DRIVE SYSTEMS DRIVE SYSTEMS. Assoc. Prof. Dr. H. İbrahim OKUMUŞ. Karadeniz Technical University

Size: px
Start display at page:

Download "DRIVE SYSTEMS DRIVE SYSTEMS. Assoc. Prof. Dr. H. İbrahim OKUMUŞ. Karadeniz Technical University"

Transcription

1 DRIVE SYSTEMS Assoc. Prof. Dr. H. İbrahim OKUMUŞ Engineering Faculty Electrical & Electronics Engineering Department 1

2 Contents of the course : Drive systems Conventional electric drives Modern electric drives (With power electronic converters) Components in electric drives Components in electric drives Overview of AC and DC drives Classification of IM drives Elementary principles of mechanics Motor steady state torque-speed characteristic Load steady state torque-speed characteristic Thermal considerations Torque-speed quadrant of operation DC motor drives AC motor drives 2

3 References 1. Vas P., "Sensorless Vector and Direct Torque Control", 1998, Oxford University Press 2. Mohan N., Undeland T.M., Robbins W.P., " Power Electronics; Converters, Applications and Design", 1995, John Wiley and Sons, Inc. 3. Wildi T., "Electrical Machines, Drives, and Power Systems", 1991, Sperika Enterprises Ltd. 4. Pillai S.K. "Fist Course on Electrical Drives", 1982, Wiley Eastern LTD 5. Hancock N.N, "Elektrik Power Utilization ", 1967, Si Isaac Pitman and Sons Ltd. 6. Bose B.K., "Power Electronics and AC Drives", 1986, Printice Hall 7. Dubley G.K., "Power Semiconductor Controlled Drives", 1989, Printice Hall 8. Subrahmanyam V., "Thyristor Control of Electric Drives", 1986, Tata McGrawHill 9. Murphy J.M., "Thyristor Control of AC Motors", 1973, Pergamon Press 10. Sen P.C., "Thyristor DC Drives", 1981, John Willey and Sons Ltd. 11. Gross H., "Electrical Drives for Machine Tools", 1983, Siemens 12. Halıcı Kemal, "Elektrik Motorlari ile Tahrik", 1969, Yildiz Universitesi 13. Unalan E., "Elektrikle Tahrik", 1967, ITU 14. Kaynak O., "Tahr'k Sistemleri", 1986, Bogazici Universitesi 15. Badur O., "Elektrik Kumanda Devreleri", 1978, MEB Yayini 16. Asik E., "Bantli Konveyorler", TMMOB Makine Muhendisleri Odasi Yayini (Yayin No:98) 17. Akpınar S., Sürücü Sistemleri Ders Notları 18. Okumuş H. İ., Sürücü Düzenekleri Ders Notları 19. Allahverdiyev Z., Elektrikte Tahrik Ders Notları 3

4 Course web page: notlar12

5 Electrical Drives Drives are systems employed for motion control Require prime movers Drives that employ electric motors as prime movers are known as Electrical Drives

6 Electrical Drives About 50% of electrical energy used for drives Can be either used for fixed speed or variable speed 75% - constant speed, 25% variable speed (expanding) MEP 1522 will be covering variable speed drives

7 Example on VSD application Constant speed Variable Speed Drives Supply motor valve pump Power In Power out Power loss Mainly in valve

8 Example on VSD application Constant speed Variable Speed Drives valve Supply motor pump Supply PEC motor pump Power In Power out Power In Power out Power loss Mainly in valve Power loss

9 Example on VSD application Constant speed Variable Speed Drives valve Supply motor pump Supply PEC motor pump Power In Power out Power In Power out Power loss Mainly in valve Power loss

10 Conventional electric drives (variable speed) Bulky Inefficient inflexible

11 Modern electric drives (With power electronic converters) Small Efficient Flexible

12 Modern electric drives Utility interface Renewable energy Machine design Speed sensorless Machine Theory Inter-disciplinary Several research area Expanding Non-linear control Real-time control DSP application PFC Speed sensorless Power electronic converters

13 Components in electric drives e.g. Single drive - sensorless vector control from Hitachi

14 Components in electric drives e.g. Multidrives system from ABB

15 Components in electric drives Motors DC motors - permanent magnet wound field AC motors induction, synchronous (IPMSM, SMPSM), brushless DC Applications, cost, environment Power sources DC batteries, fuel cell, photovoltaic - unregulated AC Single- three- phase utility, wind generator - unregulated Power processor To provide a regulated power supply Combination of power electronic converters More efficient Flexible Compact AC-DC DC-DC DC-AC AC-AC

16 Components in electric drives Control unit Complexity depends on performance requirement analog- noisy, inflexible, ideally has infinite bandwidth. digital immune to noise, configurable, bandwidth is smaller than the analog controller s DSP/microprocessor flexible, lower bandwidth - DSPs perform faster operation than microprocessors (multiplication in single cycle), can perform complex estimations

17 Overview of AC and DC drives Extracted from Boldea & Nasar

18 Overview of AC and DC drives DC motors: Regular maintenance, heavy, expensive, speed limit Easy control, decouple control of torque and flux AC motors: Less maintenance, light, less expensive, high speed Coupling between torque and flux variable spatial angle between rotor and stator flux

19 Overview of AC and DC drives Before semiconductor devices were introduced (<1950) AC motors for fixed speed applications DC motors for variable speed applications After semiconductor devices were introduced (1950s) Variable frequency sources available AC motors in variable speed applications Coupling between flux and torque control Application limited to medium performance applications fans, blowers, compressors scalar control High performance applications dominated by DC motors tractions, elevators, servos, etc

20 Overview of AC and DC drives After vector control drives were introduced (1980s) AC motors used in high performance applications elevators, tractions, servos AC motors favorable than DC motors however control is complex hence expensive Cost of microprocessor/semiconductors decreasing predicted 30 years ago AC motors would take over DC motors

21 Classification of IM drives (Buja, Kamierkowski, Direct torque control of PWM inverter-fed AC motors - a survey, IEEE Transactions on Industrial Electronics, 2004.

22 Elementary principles of mechanics v x Newton s law F m M F f F m F f d Mv dt Linear motion, constant M v 2 d d x Fm Ff M M 2 dt dt Ma First order differential equation for speed Second order differential equation for displacement

23 Elementary principles of mechanics Rotational motion T e, m T l J - Normally is the case for electrical drives T e T l d J dt m With constant J, T e T l J d dt m J d 2 dt 2 First order differential equation for angular frequency (or velocity) Second order differential equation for angle (or position)

24 torque (Nm) DRIVE SYSTEMS speed (rad/s) Elementary principles of mechanics For constant J, d J dt d dt m m T e d Tl J dt Torque dynamic present during speed transient Angular acceleration (speed) m The larger the net torque, the faster the acceleration is Doç.Dr. H. İbrahim OKUMUŞ Drive 0.22 Systems Web: 10 5

25 Elementary principles of mechanics Combination of rotational and translational motions r F l M F e r T e, T l v F e F l dv M dt T e = r(f e ), T l = r(f l ), v =r T e T l r 2 d M dt r 2 M - Equivalent moment inertia of the linearly moving mass

26 Elementary principles of mechanics effect of gearing Motors designed for high speed are smaller in size and volume Low speed applications use gear to utilize high speed motors Motor T e m Load 1, T l1 m1 n 1 J 2 J 1 n 2 m2 Load 2, T l2

27 Elementary principles of mechanics effect of gearing Motor T e m Load 1, T l1 m1 n 1 J 2 m2 J 1 n 2 Load 2, T l2 Motor T e m Equivalent Load, T lequ J equ J 1 a 2 2 J T lequ = T l1 + a 2 T l2 2 J equ a 2 = n 1 /n 2

28 SPEED Motor steady state torque-speed characteristic Synchronous mch Induction mch Separately / shunt DC mch Series DC TORQUE By using power electronic converters, the motor characteristic can be change at will

29 Load steady state torque-speed characteristic Frictional torque (passive load) SPEED T~ 2 T~ C T~ Exist in all motor-load drive system simultaneously In most cases, only one or two are dominating Exists when there is motion TORQUE Coulomb friction Viscous friction Friction due to turbulent flow

30 Load steady state torque-speed characteristic Constant torque, e.g. gravitational torque (active load) SPEED Gravitational torque Vehicle drive TORQUE T e T L gm F L T L = rf L = r g M sin

31 Load steady state torque-speed characteristic Hoist drive Speed Torque Gravitational torque

32 Load and motor steady state torque At constant speed, T e = T l Steady state speed is at point of intersection between T e and T l of the steady state torque characteristics Torque T e T l Steady state speed r3 r1 r r2 Speed

33 Torque and speed profile speed (rad/s) 100 Speed profile t (ms) The system is described by: T e T load = J(d/dt) + B J = 0.01 kg-m2, B = 0.01 Nm/rads-1 and T load = 5 Nm. What is the torque profile (torque needed to be produced)?

34 Torque and speed profile speed (rad/s) 100 T d J dt B e T l t (ms) 0 < t <10 ms Te = 0.01(0) (0) + 5 Nm = 5 Nm 10ms < t <25 ms Te = 0.01(100/0.015) +0.01( t) + 5 = ( t) Nm 25ms < t< 45ms Te = 0.01(0) (100) + 5 = 6 Nm 45ms < t < 60ms Te = 0.01(-100/0.015) ( t) + 5 = t

35 Torque and speed profile speed (rad/s) 100 Speed profile Torque (Nm) t (ms) torque profile t (ms)

36 Torque and speed profile Torque (Nm) 70 J = kg-m2, B = 0.1 Nm/rads-1 and T load = 5 Nm t (ms) -65 For the same system and with the motor torque profile given above, what would be the speed profile?

37 Thermal considerations Unavoidable power losses causes temperature increase Insulation used in the windings are classified based on the temperature it can withstand. Motors must be operated within the allowable maximum temperature Sources of power losses (hence temperature increase): - Conductor heat losses (i 2 R) - Core losses hysteresis and eddy current - Friction losses bearings, brush windage

38 Thermal considerations Electrical machines can be overloaded as long their temperature does not exceed the temperature limit Accurate prediction of temperature distribution in machines is complex hetrogeneous materials, complex geometrical shapes Simplified assuming machine as homogeneous body Ambient temperature, T o p 1 Input heat power (losses) Thermal capacity, C (Ws/ o C) Surface A, (m 2 ) Surface temperature, T ( o C) p 2 Emitted heat power (convection)

39 Thermal considerations Power balance: dt C dt p 1 p 2 Heat transfer by convection: p2 A(T T o ), where is the coefficient of heat transfer Which gives: d 1 T dt A T C p C With T(0) = 0 and p 1 = p h = constant, T ph A 1 e t /, where C A

40 Thermal considerations T p h A ph T A 1 e t / Heating transient T(0) T t T T(0) e t / Cooling transient t

41 Thermal considerations The duration of overloading depends on the modes of operation: Continuous duty Load torque is constant Continuous over extended duty period multiple Steady state temperature Short reached time intermittent duty Periodic intermittent duty Nominal output power chosen equals or exceeds continuous load T p 1n p 1n A Losses due to continuous load t

42 Thermal considerations Short time intermittent duty Operation considerably less than time constant, Motor allowed to cool before next cycle Motor can be overloaded until maximum temperature reached

43 Thermal considerations Short time intermittent duty p 1s p 1 p1n T p 1s A T max p 1n A t 1 t

44 Thermal considerations Short time intermittent duty T p p 1s 1n 1 p A1 e p1 n p1s t1/ t 1 / 1n p1s 1 1e e t / A 1 t 1 T max p 1n A T p A 1s t / 1 e t 1 t

45 Thermal considerations Periodic intermittent duty Load cycles are repeated periodically Motors are not allowed to completely cooled Fluctuations in temperature until steady state temperature is reached

46 Thermal considerations Periodic intermittent duty p1 heating coolling heating coolling heating coolling t

47 Thermal considerations Periodic intermittent duty Example of a simple case p 1 rectangular periodic pattern p p n = 100kW, nominal power M = 800kg = 0.92, nominal efficiency T = 50 o C, steady state temperature rise due to p n 1 p o pn 1 9kW Also, A 180 W / C T 50 1 If we assume motor is solid iron of specific heat c FE =0.48 kws/kg o C, thermal capacity C is given by C = c FE M = 0.48 (800) = 384 kws/ o C Finally, thermal time constant = /180 = 35 minutes

48 Thermal considerations Periodic intermittent duty Example of a simple case p 1 rectangular periodic pattern For a duty cycle of 30% (period of 20 mins), heat losses of twice the nominal, x 10 4

49 Torque-speed quadrant of operation 2 T -ve +ve P m -ve T +ve 1 +ve P m +ve T 3 4 T -ve -ve P m +ve T +ve -ve P m -ve

50 4-quadrant operation m T e m T e Direction of positive (forward) speed is arbitrary chosen Direction of positive torque will produce positive (forward) speed Quadrant 2 Forward braking Quadrant 3 Reverse motoring Quadrant 1 Forward motoring Quadrant 4 Reverse braking T e T m T e m

51 Ratings of converters and motors Torque Transient torque limit Power limit for transient torque Continuous torque limit Power limit for continuous torque Maximum speed limit Speed

52 Steady-state stability

53 DC MOTOR DRIVES

54 Contents Introduction Trends in DC drives Principles of DC motor drives Modeling of Converters and DC motor Phase-controlled Rectifier DC-DC converter (Switch-mode) Modeling of DC motor Closed-loop speed control Cascade Control Structure Closed-loop speed control - an example Torque loop Speed loop Summary

55 INTRODUCTION DC DRIVES: Electric drives that use DC motors as the prime movers DC motor: industry workhorse for decades Dominates variable speed applications before PE converters were introduced Will AC drive replaces DC drive? Predicted 30 years ago DC strong presence easy control huge numbers AC will eventually replace DC at a slow rate

56 Introduction DC Motors Advantage: Precise torque and speed control without sophisticated electronics Several limitations: Regular Maintenance Heavy Sparking Expensive Speed limitations

57 Introduction DC Motors - 2 pole Rotor Stator

58 Introduction DC Motors - 2 pole X X Armature reaction Armature mmf produces flux which distorts main flux produce by field X X X Mechanical commutator to maintain armature current direction

59 Introduction Armature reaction Flux at one side of the pole may saturate Zero flux region shifted Flux saturation, effective flux per pole decreases Armature mmf distorts field flux Large machine employs compensation windings and interpoles

60 Introduction R a L a L f R f + i a + i f + V t _ e a _ V f _ v t R a i a L di a dt e a v f R f i f L di f dt Te k t i a Electric torque e a k E Armature back e.m.f.

61 Introduction Armature circuit: V t R a i a L di a dt e a In steady state, V t R a I a E a Therefore steady state speed is given by, k V T t k 2 Three possible methods of speed control: R a T T Field flux Armature voltage V t Armature resistance Ra e

62 Introduction k V T t R a k 2 T T e Vt k T T L Varying V t V t Requires variable DC supply T e

63 Introduction k V T t R a k 2 T T e Vt k T T L Varying V t V t Requires variable DC supply T e

64 Introduction V t (k T ) RaTe k T Varying V t T L Constant T L Requires variable DC supply T e

65 Introduction V t V t V t (k T (k ) T ) I RaTe k a T R a Varying V t V t,rated Constant T L I a R a base

66 Introduction k V T t R a k 2 T T e Varying R a Vt k T T L R a Simple control Losses in external resistor T e

67 Introduction k V T t R a k 2 T T e Varying Vt k T T L Not possible for PM motor Maximum torque capability reduces T e

68 Introduction Armature voltage control : retain maximum torque capability Field flux control (i.e. flux reduced) : reduce maximum torque capability For wide range of speed control 0 to base armature voltage, above base field flux reduction Armature voltage control Field flux control T e Maximum Torque capability base

69 Introduction T e Maximum Torque capability base

70 Introduction P T e Constant torque Constant power P max base 0 to base armature voltage, above base field flux reduction P = E a I a,max = k a I a,max P max = E a I a,max = k a base I a,max 1/

71 MODELING OF CONVERTERS AND DC MOTOR POWER ELECTRONICS CONVERTERS Used to obtain variable armature voltage Efficient Ideal : lossless Phase-controlled rectifiers (AC DC) DC-DC switch-mode converters(dc DC)

72 Modeling of Converters and DC motor Phase-controlled rectifier (AC DC) 3-phase supply + V t i a Q2 Q1 Q3 Q4 T

73 Modeling of Converters and DC motor Phase-controlled rectifier 3- phase supply + V t 3-phase supply Q2 Q3 Q1 Q4 T

74 Modeling of Converters and DC motor Phase-controlled rectifier F1 R1 3-phase supply R2 + V a - F2 Q2 Q3 Q1 Q4 T

75 Modeling of Converters and DC motor Phase-controlled rectifier (continuous current) Firing circuit firing angle control Establish relation between v c and V t i ref + - current controller v c firing circuit controlled rectifier + V t

76 Modeling of Converters and DC motor Phase-controlled rectifier (continuous current) Firing angle control linear firing angle control v t 180 v c v v c t 180 V a 2V m v c cos 180 v t Cosine-wave crossing control v c v cos s V a 2V m v v c s

77 Modeling of Converters and DC motor Phase-controlled rectifier (continuous current) Steady state: linear gain amplifier Cosine wave crossing method Transient: sampler with zero order hold converter T G H (s) T 10 ms for 1-phase 50 Hz system 3.33 ms for 3-phase 50 Hz system

78 Modeling of Converters and DC motor Phase-controlled rectifier (continuous current) T d Output voltage Control signal Cosine-wave crossing T d Delay in average output voltage generation 0 10 ms for 50 Hz single phase system

79 Modeling of Converters and DC motor Phase-controlled rectifier (continuous current) Model simplified to linear gain if bandwidth (e.g. current loop) much lower than sampling frequency Low bandwidth limited applications Low frequency voltage ripple high current ripple undesirable

80 Modeling of Converters and DC motor Switch mode converters T1 + V t - Q2 Q3 Q1 Q4 T

81 Modeling of Converters and DC motor Switch mode converters T1 T2 D1 D2 + V t - Q2 Q1 Q3 Q4 Q1 T1 and D2 T Q2 D1 and T2

82 Modeling of Converters and DC motor Switch mode converters T1 D1 + V t - D3 T3 Q2 Q3 Q1 Q4 T T4 D4 D2 T2

83 Modeling of Converters and DC motor Switch mode converters Switching at high frequency Reduces current ripple Increases control bandwidth Suitable for high performance applications

84 Modeling of Converters and DC motor Switch mode converters - modeling + V dc V dc v tri v c q 1 q 0 when v c > v tri, upper switch ON when v c < v tri, lower switch ON

85 Modeling of Converters and DC motor Switch mode converters averaged model T tri v c q d d 1 T tri t T t tri qdt t T on tri V dc V t V t 1 T tri dt 0 tri V dc dt dv dc

86 -V tri,p Modeling of Converters and DC motor Switch mode converters averaged model d V tri,p v c d 0.5 v 2V c tri,p V t 0.5V dc V 2V dc tri,p v c

87 Modeling of Converters and DC motor Switch mode converters small signal model V t (s) V 2V dc tri,p v c (s) 2-quadrant converter V t (s) V V dc tri,p v c (s) 4-quadrant converter

88 Modeling of Converters and DC motor DC motor separately excited or permanent magnet v t i a R a L a di a dt e a T e T l J d dt m T e = k t i a e e = k t Extract the dc and ac components by introducing small perturbations in V t, i a, e a, T e, T L and m ac components ~ ~ di v~ dt ~ T ~ k ( i ) a t ia R ~ a L a e a e~ e e k E E a ( ~ ) dc components V t I a R T k e a E I E a E e k E a T ~ e T ~ L B ~ d( ~ ) J dt B( ) T e T L

89 Modeling of Converters and DC motor DC motor small signal model Perform Laplace Transformation on ac components ~ ~ di v~ dt a t ia R ~ a L a e a V t (s) = I a (s)r a + L a sia + E a (s) T ~ e k E ~ ( i a ) T e (s) = k E I a (s) e~ e k E ( ~ ) E a (s) = k E (s) T ~ e T ~ L B ~ d( ~ ) J dt T e (s) = T L (s) + B(s) + sj(s)

90 Modeling of Converters and DC motor DC motor small signal model T l (s) (s) Va R a sl a - I a (s) T e (s) k 1 (s ) T + B sj k E

91 Cascade control structure CLOSED-LOOP SPEED CONTROL position speed controller controller + + * * T* torque controller converter Motor tacho k T The control variable of inner loop (e.g. torque) can be limited by limiting its reference value It is flexible outer loop can be readily added or removed depending on the control requirements 1/s

92 CLOSED-LOOP SPEED CONTROL Design procedure in cascade control structure Inner loop (current or torque loop) the fastest largest bandwidth The outer most loop (position loop) the slowest smallest bandwidth Design starts from torque loop proceed towards outer loops

93 CLOSED-LOOP SPEED CONTROL Closed-loop speed control an example OBJECTIVES: Fast response large bandwidth Minimum overshoot good phase margin (>65 o ) Zero steady state error very large DC gain BODE PLOTS METHOD Obtain linear small signal model Design controllers based on linear small signal model Perform large signal simulation for controllers verification

94 CLOSED-LOOP SPEED CONTROL Closed-loop speed control an example Permanent magnet motor s parameters Ra = 2 B = 1 x10 4 kg.m 2 /sec k e = 0.1 V/(rad/s) V d = 60 V La = 5.2 mh J = 152 x 10 6 kg.m 2 k t = 0.1 Nm/A V tri = 5 V f s = 33 khz PI controllers Switching signals from comparison of v c and triangular waveform

95 CLOSED-LOOP SPEED CONTROL Torque controller design v tri q T c + Torque controller + V dc q k t DC motor T e (s) + - Torque controller Converter V V dc tri,peak V a (s) R a sl a T l (s) I a (s) T (s) k e - 1 (s ) T B sj + k E

96 Phase (deg) DRIVE SYSTEMS Magnitude (db) CLOSED-LOOP SPEED CONTROL Torque controller design Open-loop gain 150 Bode Diagram From: Input Point To: Output Point compensated k pt = 90 k it = compensated Frequency (rad/sec)

97 CLOSED-LOOP SPEED CONTROL Speed controller design Assume torque loop unity gain for speed bandwidth << Torque bandwidth * + Speed T* 1 T 1 controller B sj Torque loop

98 Phase (deg) DRIVE SYSTEMS Magnitude (db) CLOSED-LOOP SPEED CONTROL Speed controller Open-loop gain 150 Bode Diagram From: Input Point To: Output Point 100 k ps = compensated k is = compensated Frequency (Hz)

99 CLOSED-LOOP SPEED CONTROL Large Signal Simulation results Speed Torque

100 CLOSED-LOOP SPEED CONTROL DESIGN EXAMPLE SUMMARY Speed control by: armature voltage (0 b ) and field flux ( b ) Power electronics converters to obtain variable armature voltage Phase controlled rectifier small bandwidth large ripple Switch-mode DC-DC converter large bandwidth small ripple Controller design based on linear small signal model Power converters - averaged model DC motor separately excited or permanent magnet Closed-loop speed control design based on Bode plots Verify with large signal simulation

Mathematical Modeling and Dynamic Simulation of a Class of Drive Systems with Permanent Magnet Synchronous Motors

Mathematical Modeling and Dynamic Simulation of a Class of Drive Systems with Permanent Magnet Synchronous Motors Applied and Computational Mechanics 3 (2009) 331 338 Mathematical Modeling and Dynamic Simulation of a Class of Drive Systems with Permanent Magnet Synchronous Motors M. Mikhov a, a Faculty of Automatics,

More information

Electrical Drives 1. Week 1: Introduction to drive systems

Electrical Drives 1. Week 1: Introduction to drive systems Electrical Drives 1 Week 1: Introduction to drive systems What Do we mean by Electrical Drive System? It is the study of the electric system involving controlling electric motors in both steady state and

More information

Application Information

Application Information Moog Components Group manufactures a comprehensive line of brush-type and brushless motors, as well as brushless controllers. The purpose of this document is to provide a guide for the selection and application

More information

Motors and Generators

Motors and Generators Motors and Generators Electro-mechanical devices: convert electrical energy to mechanical motion/work and vice versa Operate on the coupling between currentcarrying conductors and magnetic fields Governed

More information

SYNCHRONOUS MACHINES

SYNCHRONOUS MACHINES SYNCHRONOUS MACHINES The geometry of a synchronous machine is quite similar to that of the induction machine. The stator core and windings of a three-phase synchronous machine are practically identical

More information

Power Electronics. Prof. K. Gopakumar. Centre for Electronics Design and Technology. Indian Institute of Science, Bangalore.

Power Electronics. Prof. K. Gopakumar. Centre for Electronics Design and Technology. Indian Institute of Science, Bangalore. Power Electronics Prof. K. Gopakumar Centre for Electronics Design and Technology Indian Institute of Science, Bangalore Lecture - 1 Electric Drive Today, we will start with the topic on industrial drive

More information

The Basics of Permanent Magnet Motor Operations

The Basics of Permanent Magnet Motor Operations COURSE# - 1 The Basics of Permanent Magnet Motor Operations By George Holling COURSE# - 2 Introduction Introduction The physics of permanent magnets Basic PM motor operating principles Basic motor parameters

More information

DIRECT torque control (DTC) of induction motors has

DIRECT torque control (DTC) of induction motors has 76 IEEE POWER ELECTRONICS LETTERS, VOL. 3, NO. 2, JUNE 2005 Constant and High Switching Frequency Torque Controller DTC Drives C. L. Toh, N. R. N. Idris, Senior Member, IEEE, and A. H. M. Yatim, Senior

More information

Experiment 1 The DC Machine

Experiment 1 The DC Machine Experiment 1 The DC Machine ECEN 4517 R. W. Erickson and D. Maksimovic The purpose of this experiment is to become familiar with operating principles, equivalent circuit models, and basic characteristics

More information

USER MANUAL DC TORQUE MOTOR

USER MANUAL DC TORQUE MOTOR USER MANUAL DC ORQUE MOOR he present manual shows an opportunity for the servomechanisms builders of choosing the DC torque motors, with high performances, low price and immediate delivery. ICE SA Department

More information

Wave Shaping Of Current Using PWM Rectifiers

Wave Shaping Of Current Using PWM Rectifiers International Journal of Engineering and Technical Research (IJETR) Wave Shaping Of Current Using PWM Rectifiers Mahasweta Bhattacharya, Ashish Srivastava Abstract The paper presents the modeling and analysis

More information

Speed Control Methods of Various Types of Speed Control Motors. Kazuya SHIRAHATA

Speed Control Methods of Various Types of Speed Control Motors. Kazuya SHIRAHATA Speed Control Methods of Various Types of Speed Control Motors Kazuya SHIRAHATA Oriental Motor Co., Ltd. offers a wide variety of speed control motors. Our speed control motor packages include the motor,

More information

With Zero Emission and Human Powered Vehicles

With Zero Emission and Human Powered Vehicles Powering the Future With Zero Emission and Human Powered Vehicles Antoni Garcia Espinosa UPC CONTROL OF BRUSHLESS PERMANENT MAGNET MACHINES (BLDC) Powering the Future With Zero Emission and Human Powered

More information

ABB drives. Technical guide No. 1 Direct torque control - the world s most advanced AC drive technology

ABB drives. Technical guide No. 1 Direct torque control - the world s most advanced AC drive technology ABB drives Technical guide No. 1 Direct torque control - the world s most advanced AC drive technology 2 Direct torque control Technical guide No. 1 Technical guide No. 1 Direct torque control - the world

More information

What is Field Oriented Control and what good is it?

What is Field Oriented Control and what good is it? What is Field Oriented Control and what good is it? Using brushless servo motors and drives in your next new product? You have probably seen the buzzwords: 'Trapezoidal', 'Sinusoidal', and 'Field Oriented

More information

8 Speed control of Induction Machines

8 Speed control of Induction Machines 8 Speed control of Induction Machines We have seen the speed torque characteristic of the machine. In the stable region of operation in the motoring mode, the curve is rather steep and goes from zero torque

More information

CNC Machine Control Unit

CNC Machine Control Unit NC Hardware a NC Hardware CNC Machine Control Unit Servo Drive Control Hydraulic Servo Drive Hydraulic power supply unit Servo valve Servo amplifiers Hydraulic motor Hydraulic Servo Valve Hydraulic Servo

More information

Direct Current Motors

Direct Current Motors Direct Current Motors DC MOTORS The DC machine can operate as a generator and as a motor. Chap 5. Electrical Machines by Wildi, 6 e Lecturer: R. Alba-Flores Alfred State College Spring 2008 When a DC machine

More information

APPLICATION NOTE - 017

APPLICATION NOTE - 017 APPLICATION NOTE - 017 PWM Motor Drives Theory and Measurement Considerations Pulse Width Modulated (PWM) power electronic techniques represent a large and increasing proportion of modern power electronics.

More information

Brush DC Motor Basics. by Simon Pata Business Unit Manager, Brushless DC

Brush DC Motor Basics. by Simon Pata Business Unit Manager, Brushless DC thinkmotion Brush DC Motor Basics by Simon Pata Business Unit Manager, Brushless DC Ironless DC Motor Basics Technical Note Brushed DC ironless motors are found in a large variety of products and applications

More information

Technical Guide No. 100. High Performance Drives -- speed and torque regulation

Technical Guide No. 100. High Performance Drives -- speed and torque regulation Technical Guide No. 100 High Performance Drives -- speed and torque regulation Process Regulator Speed Regulator Torque Regulator Process Technical Guide: The illustrations, charts and examples given in

More information

Modelling, Simulation and Performance Analysis of A Variable Frequency Drive in Speed Control Of Induction Motor

Modelling, Simulation and Performance Analysis of A Variable Frequency Drive in Speed Control Of Induction Motor International Journal of Engineering Inventions e-issn: 78-7461, p-issn: 319-6491 Volume 3, Issue 5 (December 013) PP: 36-41 Modelling, Simulation and Performance Analysis of A Variable Frequency Drive

More information

Manufacturing Equipment Modeling

Manufacturing Equipment Modeling QUESTION 1 For a linear axis actuated by an electric motor complete the following: a. Derive a differential equation for the linear axis velocity assuming viscous friction acts on the DC motor shaft, leadscrew,

More information

EE 402 RECITATION #13 REPORT

EE 402 RECITATION #13 REPORT MIDDLE EAST TECHNICAL UNIVERSITY EE 402 RECITATION #13 REPORT LEAD-LAG COMPENSATOR DESIGN F. Kağan İPEK Utku KIRAN Ç. Berkan Şahin 5/16/2013 Contents INTRODUCTION... 3 MODELLING... 3 OBTAINING PTF of OPEN

More information

ELECTRIC GENERATORS FOR DIRECT COUPLED HIGH SPEED TURBO GENERATORS IN DISTRIBUTED POWER SYSTEMS

ELECTRIC GENERATORS FOR DIRECT COUPLED HIGH SPEED TURBO GENERATORS IN DISTRIBUTED POWER SYSTEMS ELECTRIC GENERATORS FOR DIRECT COUPLED HIGH SPEED TURBO GENERATORS IN DISTRIBUTED POWER SYSTEMS Jay G. Vaidya Electrodynamics Associates, Inc. 409 Eastbridge Drive, Oviedo, FL 32765 ABSTRACT This paper

More information

2. A conductor of length 2m moves at 4m/s at 30 to a uniform magnetic field of 0.1T. Which one of the following gives the e.m.f. generated?

2. A conductor of length 2m moves at 4m/s at 30 to a uniform magnetic field of 0.1T. Which one of the following gives the e.m.f. generated? Extra Questions - 2 1. A straight length of wire moves through a uniform magnetic field. The e.m.f. produced across the ends of the wire will be maximum if it moves: a) along the lines of magnetic flux

More information

LOSSELESS STARTING METHOD FOR THE WOUND ROTOR INDUCTION MOTOR

LOSSELESS STARTING METHOD FOR THE WOUND ROTOR INDUCTION MOTOR LOSSELESS STARTING METHOD FOR THE WOUND ROTOR INDUCTION MOTOR Sergiu Ivanov Mihai Rdulescu University of Craiova, Romania INDA Craiova Faculty of Electrical Engineering 30, Mr#e#ti Street 107, Decebal

More information

DIRECT CURRENT GENERATORS

DIRECT CURRENT GENERATORS DIRECT CURRENT GENERATORS Revision 12:50 14 Nov 05 INTRODUCTION A generator is a machine that converts mechanical energy into electrical energy by using the principle of magnetic induction. This principle

More information

Control circuit. gathering and reporting fault messages. carrying out of protective functions for the frequency converter and motor.

Control circuit. gathering and reporting fault messages. carrying out of protective functions for the frequency converter and motor. Control circuit The control circuit, or control card, is the fourth main component of the frequency converter and has four essential tasks: control of the frequency converter semi-conductors. data exchange

More information

INSTRUMENTATION AND CONTROL TUTORIAL 2 ELECTRIC ACTUATORS

INSTRUMENTATION AND CONTROL TUTORIAL 2 ELECTRIC ACTUATORS INSTRUMENTATION AND CONTROL TUTORIAL 2 ELECTRIC ACTUATORS This is a stand alone tutorial on electric motors and actuators. The tutorial is of interest to any student studying control systems and in particular

More information

Principles of Adjustable Frequency Drives

Principles of Adjustable Frequency Drives What is an Adjustable Frequency Drive? An adjustable frequency drive is a system for controlling the speed of an AC motor by controlling the frequency of the power supplied to the motor. A basic adjustable

More information

Drivetech, Inc. Innovations in Motor Control, Drives, and Power Electronics

Drivetech, Inc. Innovations in Motor Control, Drives, and Power Electronics Drivetech, Inc. Innovations in Motor Control, Drives, and Power Electronics Dal Y. Ohm, Ph.D. - President 25492 Carrington Drive, South Riding, Virginia 20152 Ph: (703) 327-2797 Fax: (703) 327-2747 ohm@drivetechinc.com

More information

Fundamentals of Power Electronics. Robert W. Erickson University of Colorado, Boulder

Fundamentals of Power Electronics. Robert W. Erickson University of Colorado, Boulder Robert W. Erickson University of Colorado, Boulder 1 1.1. Introduction to power processing 1.2. Some applications of power electronics 1.3. Elements of power electronics Summary of the course 2 1.1 Introduction

More information

FAULT DIAGNOSIS OF INDUCTION MOTOR

FAULT DIAGNOSIS OF INDUCTION MOTOR FAULT DIAGNOSIS OF INDUCTION MOTOR Sanjana Malhotra, Associate Professor Manav Rachna College of Engineering, Faridabad, India M. K. Soni, Executive Director Manav Rachna International University, Faridabad,

More information

HIGH SPEED PERMANENT MAGNET SYNCHRONOUS MOTOR / GENERATOR DESIGN FOR FLYWHEEL APPLICATIONS

HIGH SPEED PERMANENT MAGNET SYNCHRONOUS MOTOR / GENERATOR DESIGN FOR FLYWHEEL APPLICATIONS HIGH SPEED PERMANENT MAGNET SYNCHRONOUS MOTOR / GENERATOR DESIGN FOR FLYWHEEL APPLICATIONS Aleksandr Nagorny, Ph.D. National Research Council Outline Introduction Selection of the Rated Point The major

More information

PRODUCTS DC MOTORS BLPM MOTORS AC MOTORS CONTROLLERS

PRODUCTS DC MOTORS BLPM MOTORS AC MOTORS CONTROLLERS D R I V E S Y S T E M S PRODUCTS DC MOTORS BLPM MOTORS AC MOTORS CONTROLLERS The vision of Iskra Avtoelektrika is to be: One of the world's leading manufacturers of electric motors and controllers for

More information

DC GENERATOR THEORY. LIST the three conditions necessary to induce a voltage into a conductor.

DC GENERATOR THEORY. LIST the three conditions necessary to induce a voltage into a conductor. DC Generators DC generators are widely used to produce a DC voltage. The amount of voltage produced depends on a variety of factors. EO 1.5 LIST the three conditions necessary to induce a voltage into

More information

AC Drive Theory and Application

AC Drive Theory and Application AC Drive Theory and Application Application Guide AP4145E Effective May 28 Introduction Adjustable Frequency AC Drive System Description An adjustable frequency AC drive system consists of an ordinary

More information

VFD 101 Lesson 4. Application Terminology for a VFD

VFD 101 Lesson 4. Application Terminology for a VFD VFD 101 Lesson 4 Application Terminology for a VFD This lesson covers the application terminology associated with a Variable Frequency Drive (VFD) and describes each term in detail. When applying a Variable

More information

ELECTRICAL ENGINEERING

ELECTRICAL ENGINEERING ELECTRICAL ENGINEERING The master degree programme of Teacher Training in Electronical Engineering is designed to develop graduates competencies in the field of Curriculum Development and Instructional

More information

FREQUENCY CONTROLLED AC MOTOR DRIVE

FREQUENCY CONTROLLED AC MOTOR DRIVE FREQUENCY CONTROLLED AC MOTOR DRIVE 1.0 Features of Standard AC Motors The squirrel cage induction motor is the electrical motor motor type most widely used in industry. This leading position results mainly

More information

Electrical Power & Machines

Electrical Power & Machines d.c. Machines a.c. Single & Three Phase Machines Dissectible Machines Single & Three phase Transformers Measurement & Control Power Electronics Conventional & Virtual (PC based) Instrumentation Renewable

More information

Development of the Induction Motor for Machine Tool Spindles and Servo Amplifier SANMOTION S

Development of the Induction Motor for Machine Tool Spindles and Servo Amplifier SANMOTION S New Products Introduction Development of the Induction Motor for Machine Tool Spindles and Servo Amplifier SANMOTION S Takashi Sekiguchi Masahiro Kidou Yuusuke Shimura Yuji Ide Masahisa Koyama Michio Kitahara

More information

Current Loop Tuning Procedure. Servo Drive Current Loop Tuning Procedure (intended for Analog input PWM output servo drives) General Procedure AN-015

Current Loop Tuning Procedure. Servo Drive Current Loop Tuning Procedure (intended for Analog input PWM output servo drives) General Procedure AN-015 Servo Drive Current Loop Tuning Procedure (intended for Analog input PWM output servo drives) The standard tuning values used in ADVANCED Motion Controls drives are conservative and work well in over 90%

More information

Lab 8: DC generators: shunt, series, and compounded.

Lab 8: DC generators: shunt, series, and compounded. Lab 8: DC generators: shunt, series, and compounded. Objective: to study the properties of DC generators under no-load and full-load conditions; to learn how to connect these generators; to obtain their

More information

Tamura Open Loop Hall Effect Current Sensors

Tamura Open Loop Hall Effect Current Sensors Tamura Open Loop Hall Effect Current Sensors AC, DC, & Complex Currents Galvanic Isolation Fast Response 50kHz small signal frequency bandwidth Quality & Reliability RoHs compliance Overview The following

More information

Harmonics and Noise in Photovoltaic (PV) Inverter and the Mitigation Strategies

Harmonics and Noise in Photovoltaic (PV) Inverter and the Mitigation Strategies Soonwook Hong, Ph. D. Michael Zuercher Martinson Harmonics and Noise in Photovoltaic (PV) Inverter and the Mitigation Strategies 1. Introduction PV inverters use semiconductor devices to transform the

More information

Harmonic Drive acutator P r e c i s i o n G e a r i n g & M o t i o n C o n t r o l

Harmonic Drive acutator P r e c i s i o n G e a r i n g & M o t i o n C o n t r o l D C S e r v o S y s t e m s RH Mini Series Total Motion Control Harmonic Drive acutator P r e c i s i o n G e a r i n g & M o t i o n C o n t r o l Precision Gearing & Motion Control DC SERVO ACTUATORS

More information

Design and Analysis of Switched Reluctance Motors

Design and Analysis of Switched Reluctance Motors Design and Analysis of Switched Reluctance Motors İbrahim ŞENGÖR, Abdullah POLAT, and Lale T. ERGENE Electrical and Electronic Faculty, İstanbul Technical University, 34469, Istanbul, TURKEY sengoribrahim@gmail.com,

More information

CHAPTER 3 INDUCTION MOTOR AND DIFFERENT SPEED CONTROL METHODS

CHAPTER 3 INDUCTION MOTOR AND DIFFERENT SPEED CONTROL METHODS CHAPTER 3 INDUCTION MOTOR AND DIFFERENT SPEED CONTROL METHODS Page No 3.1 Introduction 58 3.2 Three Phase Induction Motor 58 3.2.1 Stator 60 3.2.2 Rotor 60 3.2.3 Working principle of three phase induction

More information

HOW TO DRIVE DC MOTORS WITH SMART POWER ICs

HOW TO DRIVE DC MOTORS WITH SMART POWER ICs HOW TO DRIVE DC MOTORS WITH SMART POWER ICs by Herbert Sax There are many ways to control DC motors. Open-loop current control acts directly on torque and thus protects the electronics, the motor and the

More information

The Synchronous Machine

The Synchronous Machine Experiment No. 5 The Synchronous Machine Synchronous ac machines find application as motors in constant speed applications and, when interfaced to the power source with a variable-frequency converter system,

More information

EN 206: Power Electronics and Machines

EN 206: Power Electronics and Machines EN 206: Power Electronics and Machines Electric Drives Suryanarayana Doolla Department of Energy Science and Engineering Indian Institute of Technology Bombay email: suryad@iitb.ac.in September 14, 2011

More information

General Purpose Permanent Magnet Motor Drive without Speed and Position Sensor

General Purpose Permanent Magnet Motor Drive without Speed and Position Sensor General Purpose Permanent Magnet Motor Drive without Speed and Position Sensor Jun Kang, PhD Yaskawa Electric America, Inc. 1. Power consumption by electric motors Fig.1 Yaskawa V1000 Drive and a PM motor

More information

8 Application of d.c. motors

8 Application of d.c. motors 8 Application of d.c. motors Some elementary principles of application alone are dealt with here. The focus is on the mechanical equation of dynamics which is reproduced here once again. T M T L = J dw

More information

Principles and Working of DC and AC machines

Principles and Working of DC and AC machines BITS Pilani Dubai Campus Principles and Working of DC and AC machines Dr Jagadish Nayak Constructional features BITS Pilani Dubai Campus DC Generator A generator consists of a stationary portion called

More information

Chapter 3: AC and DC Motors DC Motors: General Principles of Operation 83. Most DC motors also carry one of three duty ratings:

Chapter 3: AC and DC Motors DC Motors: General Principles of Operation 83. Most DC motors also carry one of three duty ratings: Chapter 3: AC and DC Motors DC Motors: General Principles of Operation 83 Amps/field amps: designations for armature and field winding amps, respectively. These ratings are needed when programming the

More information

How to Turn an AC Induction Motor Into a DC Motor (A Matter of Perspective) Steve Bowling Application Segments Engineer Microchip Technology, Inc.

How to Turn an AC Induction Motor Into a DC Motor (A Matter of Perspective) Steve Bowling Application Segments Engineer Microchip Technology, Inc. 1 How to Turn an AC Induction Motor Into a DC Motor (A Matter of Perspective) Steve Bowling Application Segments Engineer Microchip Technology, Inc. The territory of high-performance motor control has

More information

EDUMECH Mechatronic Instructional Systems. Ball on Beam System

EDUMECH Mechatronic Instructional Systems. Ball on Beam System EDUMECH Mechatronic Instructional Systems Ball on Beam System Product of Shandor Motion Systems Written by Robert Hirsch Ph.D. 998-9 All Rights Reserved. 999 Shandor Motion Systems, Ball on Beam Instructional

More information

CHAPTER 3 ANALYSIS OF SWITHCHED MODE PWM INVERTER

CHAPTER 3 ANALYSIS OF SWITHCHED MODE PWM INVERTER 31 CHAPTER 3 ANALYSIS OF SWITHCHED MODE PWM INVERTER 3.1 INTRODUCTION Fixed DC power can be converted into AC power at desired output voltage and frequency by using a power electronics circuit, called

More information

Variable Frequency Drives

Variable Frequency Drives Purchasing Tips Analyse the System as a Whole Variable Frequency Drives Since the process of converting incoming power from one frequency to another will result in some losses, energy savings must always

More information

Power supplies. EE328 Power Electronics Assoc. Prof. Dr. Mutlu BOZTEPE Ege University, Dept. of E&E

Power supplies. EE328 Power Electronics Assoc. Prof. Dr. Mutlu BOZTEPE Ege University, Dept. of E&E Power supplies EE328 Power Electronics Assoc. Prof. Dr. Mutlu BOZTEPE Ege University, Dept. of E&E EE328 POWER ELECTRONICS Outline of lecture Introduction to power supplies Modelling a power transformer

More information

ENERGY TRANSFER SYSTEMS AND THEIR DYNAMIC ANALYSIS

ENERGY TRANSFER SYSTEMS AND THEIR DYNAMIC ANALYSIS ENERGY TRANSFER SYSTEMS AND THEIR DYNAMIC ANALYSIS Many mechanical energy systems are devoted to transfer of energy between two points: the source or prime mover (input) and the load (output). For chemical

More information

Dually Fed Permanent Magnet Synchronous Generator Condition Monitoring Using Stator Current

Dually Fed Permanent Magnet Synchronous Generator Condition Monitoring Using Stator Current Summary Dually Fed Permanent Magnet Synchronous Generator Condition Monitoring Using Stator Current Joachim Härsjö, Massimo Bongiorno and Ola Carlson Chalmers University of Technology Energi och Miljö,

More information

Simulation of Electric Drives using the Machines Library and the SmartElectricDrives Library

Simulation of Electric Drives using the Machines Library and the SmartElectricDrives Library Simulation of Electric Drives using the Machines Library and the SmartElectricDrives Library J.V. Gragger, H. Giuliani, H. Kapeller, T. Bäuml arsenal research, Vienna 04.09.2006 1 Contents Chapter 1: The

More information

Torque motors. direct drive technology

Torque motors. direct drive technology Torque motors direct drive technology Why Direct Drive Motors? Fast and effective Direct-drive technology in mechanical engineering is defined as the use of actuators which transfer their power directly

More information

Induction Motor Theory

Induction Motor Theory PDHonline Course E176 (3 PDH) Induction Motor Theory Instructor: Jerry R. Bednarczyk, P.E. 2012 PDH Online PDH Center 5272 Meadow Estates Drive Fairfax, VA 22030-6658 Phone & Fax: 703-988-0088 www.pdhonline.org

More information

USE OF ARNO CONVERTER AND MOTOR-GENERATOR SET TO CONVERT A SINGLE-PHASE AC SUPPLY TO A THREE-PHASE AC FOR CONTROLLING THE SPEED OF A THREE-PHASE INDUCTION MOTOR BY USING A THREE-PHASE TO THREE-PHASE CYCLOCONVERTER

USE OF ARNO CONVERTER AND MOTOR-GENERATOR SET TO CONVERT A SINGLE-PHASE AC SUPPLY TO A THREE-PHASE AC FOR CONTROLLING THE SPEED OF A THREE-PHASE INDUCTION MOTOR BY USING A THREE-PHASE TO THREE-PHASE CYCLOCONVERTER International Journal of Electrical Engineering & Technology (IJEET) Volume 7, Issue 2, March-April, 2016, pp.19-28, Article ID: IJEET_07_02_003 Available online at http:// http://www.iaeme.com/ijeet/issues.asp?jtype=ijeet&vtype=7&itype=2

More information

AND8008/D. Solid State Control Solutions for Three Phase 1 HP Motor APPLICATION NOTE

AND8008/D. Solid State Control Solutions for Three Phase 1 HP Motor APPLICATION NOTE Solid State Control Solutions for Three Phase 1 HP Motor APPLICATION NOTE INTRODUCTION In all kinds of manufacturing, it is very common to have equipment that has three phase motors for doing different

More information

BMD. Permanent Magnet AC Synchronous Motors

BMD. Permanent Magnet AC Synchronous Motors BMD Permanent Magnet AC Synchronous Motors Power, control and green solutions About us 3 Bonfiglioli, one name for a large international group. It was back in 1956 that Clementino Bonfiglioli established

More information

Wind Energy System. Functional Description and Complete System Block Diagram. Andy Brown, Basheer Qattum, Ali Gokal. Dr. Na and Dr.

Wind Energy System. Functional Description and Complete System Block Diagram. Andy Brown, Basheer Qattum, Ali Gokal. Dr. Na and Dr. Wind Energy System Functional Description and Complete System Block Diagram Andy Brown, Basheer Qattum, Ali Gokal Dr. Na and Dr. Huggins I. Introduction: In a world where resources are becoming scarce,

More information

Specifying a Variable Frequency Drive s

Specifying a Variable Frequency Drive s Specifying a Variable Frequency Drive s Put on by Bruce Reeves and Jeremy Gonzales Dykman Electrical Covering the Western US For all of your VFD and Soft Start and Motor Needs How To Specify a Variable

More information

A Simplified Approach to dc Motor Modeling for Dynamic Stability Analysis

A Simplified Approach to dc Motor Modeling for Dynamic Stability Analysis Application Report SLUA076 - July 2000 A Simplified Approach to dc Motor Modeling for Dynamic Stability Analysis Edited by Mickey McClure Power Supply Control Products ABSTRACT When we say that an electric

More information

Modern High-Efficient PM Synchronous Motors Recently developed projects. Alessandro Sartorello Hannover CUSTOM MADE CUSTOM PHILOSOPHY

Modern High-Efficient PM Synchronous Motors Recently developed projects. Alessandro Sartorello Hannover CUSTOM MADE CUSTOM PHILOSOPHY Modern High-Efficient PM Synchronous Motors Recently developed projects Alessandro Sartorello 27.04.2016 Hannover CUSTOM MADE CUSTOM PHILOSOPHY Introduction» 3-ph PWM-inverter fed PM Synchronous Motors

More information

What Is Regeneration?

What Is Regeneration? What Is Regeneration? Braking / Regeneration Manual Regeneration Overview Revision 1.0 When the rotor of an induction motor turns slower than the speed set by the applied frequency, the motor is transforming

More information

LAK DC Motors. LAK 4000 Series kw HP Nm. t-telectric.com. Catalogue-2008/11 E

LAK DC Motors. LAK 4000 Series kw HP Nm. t-telectric.com. Catalogue-2008/11 E LAK DC Motors Catalogue-2008/11 E LAK 4000 Series 112-280 1-500 kw 1-700 HP 30-4500 Nm t-telectric.com List of contents Introduction... p. 4 Options... p. 5 Application data... p. 6 Output data... p.

More information

Characteristics and Benefits

Characteristics and Benefits Defining Quality. Building Comfort. Characteristics and Benefits Characteristics and Benefits The two most common electronic devices to vary fan speed in HVAC equipment are the variable frequency drive

More information

Design of a TL431-Based Controller for a Flyback Converter

Design of a TL431-Based Controller for a Flyback Converter Design of a TL431-Based Controller for a Flyback Converter Dr. John Schönberger Plexim GmbH Technoparkstrasse 1 8005 Zürich 1 Introduction The TL431 is a reference voltage source that is commonly used

More information

Manjari Mehrotra, Dr. A.K Pandey

Manjari Mehrotra, Dr. A.K Pandey ISO 91:28 Certified Volume 2, Issue 5, November 212 Harmonics Analysis of VSI Fed Induction Motor Drive Abstract- This paper mainly focus on harmonics analysis of three phase AC supply available from three

More information

Siemens AG 2011 SINAMICS V60. The perfect solution for basic servo applications. Brochure May 2011 SINAMICS. Answers for industry.

Siemens AG 2011 SINAMICS V60. The perfect solution for basic servo applications. Brochure May 2011 SINAMICS. Answers for industry. The perfect solution for basic servo applications Brochure May 2011 SINAMICS Answers for industry. with 1FL5 servomotors The solution for basic servo applications There is a requirement to automate motion

More information

Motor Fundamentals. DC Motor

Motor Fundamentals. DC Motor Motor Fundamentals Before we can examine the function of a drive, we must understand the basic operation of the motor. It is used to convert the electrical energy, supplied by the controller, to mechanical

More information

Simulation and Analysis of Power Factor Correction in Electric Control System for Metal Halide High Intensity Discharge Lamps

Simulation and Analysis of Power Factor Correction in Electric Control System for Metal Halide High Intensity Discharge Lamps Advance in Electronic and Electric Engineering. ISSN 2231-1297, Volume 4, Number 2 (2014), pp. 185-192 Research India Publications http://www.ripublication.com/aeee.htm Simulation and Analysis of Power

More information

ELECTRICAL ENGINEERING

ELECTRICAL ENGINEERING EE ELECTRICAL ENGINEERING See beginning of Section H for abbreviations, course numbers and coding. The * denotes labs which are held on alternate weeks. A minimum grade of C is required for all prerequisite

More information

SPEED CONTROL OF INDUCTION MACHINE WITH REDUCTION IN TORQUE RIPPLE USING ROBUST SPACE-VECTOR MODULATION DTC SCHEME

SPEED CONTROL OF INDUCTION MACHINE WITH REDUCTION IN TORQUE RIPPLE USING ROBUST SPACE-VECTOR MODULATION DTC SCHEME International Journal of Advanced Research in Engineering and Technology (IJARET) Volume 7, Issue 2, March-April 2016, pp. 78 90, Article ID: IJARET_07_02_008 Available online at http://www.iaeme.com/ijaret/issues.asp?jtype=ijaret&vtype=7&itype=2

More information

Chopper Based Speed Control of DC Motor

Chopper Based Speed Control of DC Motor Chopper Based Speed Control of DC Motor 1 Krunal Shah, 2 Vidhi Shah, 3 Deepak Mistry 1 Assistant Professor, 2 Assistant Professor, 3 ME pursuing, Gujarat, India. Abstract: The DC motor is an attractive

More information

Welcome to this training module which looks at the hardware construction of an AC drive.

Welcome to this training module which looks at the hardware construction of an AC drive. Welcome to this training module which looks at the hardware construction of an AC drive. 1 After completing this module, you will be able to: List the main parts of an AC drive (frequency converter) and

More information

Selecting the Most Effective Current Sensing Technology

Selecting the Most Effective Current Sensing Technology www.raztec.co.nz CURRENT SENSING 27 Selecting the Most Effective Current Sensing Technology When faced with selecting the most suitable method of accurate current measurement, a design engineer is faced

More information

INDUCTION MOTOR PERFORMANCE TESTING WITH AN INVERTER POWER SUPPLY, PART 2

INDUCTION MOTOR PERFORMANCE TESTING WITH AN INVERTER POWER SUPPLY, PART 2 INDUCTION MOTOR PERFORMANCE TESTING WITH AN INVERTER POWER SUPPLY, PART 2 By: R.C. Zowarka T.J. Hotz J.R. Uglum H.E. Jordan 13th Electromagnetic Launch Technology Symposium, Potsdam (Berlin), Germany,

More information

Simulation of VSI-Fed Variable Speed Drive Using PI-Fuzzy based SVM-DTC Technique

Simulation of VSI-Fed Variable Speed Drive Using PI-Fuzzy based SVM-DTC Technique Simulation of VSI-Fed Variable Speed Drive Using PI-Fuzzy based SVM-DTC Technique B.Hemanth Kumar 1, Dr.G.V.Marutheshwar 2 PG Student,EEE S.V. College of Engineering Tirupati Senior Professor,EEE dept.

More information

CHAPTER 4 DESIGN OF INTEGRAL SLOT AND FRACTIONAL SLOT BRUSHLESS DC MOTOR

CHAPTER 4 DESIGN OF INTEGRAL SLOT AND FRACTIONAL SLOT BRUSHLESS DC MOTOR 47 CHAPTER 4 DESIGN OF INTEGRAL SLOT AND FRACTIONAL SLOT BRUSHLESS DC MOTOR 4.1 INTRODUCTION This chapter deals with the design of 24 slots 8 poles, 48 slots 16 poles and 60 slots 16 poles brushless dc

More information

Laboratory 4: Feedback and Compensation

Laboratory 4: Feedback and Compensation Laboratory 4: Feedback and Compensation To be performed during Week 9 (Oct. 20-24) and Week 10 (Oct. 27-31) Due Week 11 (Nov. 3-7) 1 Pre-Lab This Pre-Lab should be completed before attending your regular

More information

Flux Conference 2012. High Efficiency Motor Design for Electric Vehicles

Flux Conference 2012. High Efficiency Motor Design for Electric Vehicles Flux Conference 2012 High Efficiency Motor Design for Electric Vehicles L. Chen, J. Wang, P. Lombard, P. Lazari and V. Leconte University of Sheffield, Date CEDRAT : 18 October 2012 Presented by: P. Lazari

More information

48550 Electrical Energy Technology

48550 Electrical Energy Technology 48550 Electrical Energy Technology Chapter 14. Brushless DC Motors Topics to cover: 1. Introduction 2. Structures and Drive Circuits 3. Equivalent Circuit 4. Performance 5. Applications Introduction Conventional

More information

Half-Wave Rectifiers

Half-Wave Rectifiers Half-Wave Rectifiers Important Points of This Lecture Calculation of output voltage using appropriate piecewise models for diode for simple (unfiltered) half-wave rectifier Differences between calculations

More information

Functions, variations and application areas of magnetic components

Functions, variations and application areas of magnetic components Westring 18 3314 Büren Germany T +49 951 60 01 0 F +49 951 60 01 3 www.schaffner.com energy efficiency and reliability 1.1 Transformers The transformer is one of the traditional components of electrical

More information

AC vs DC Brushless Servo Motor. By John Mazurkiewicz, Baldor Electric

AC vs DC Brushless Servo Motor. By John Mazurkiewicz, Baldor Electric AC vs DC Brushless Servo Motor By John Mazurkiewicz, Baldor Electric Brushless motors are similar to AC motors since a moving magnet field causes rotor movement. Brushless motors are also similar to PM

More information

WIND TURBINE TECHNOLOGY

WIND TURBINE TECHNOLOGY Module 2.2-2 WIND TURBINE TECHNOLOGY Electrical System Gerhard J. Gerdes Workshop on Renewable Energies November 14-25, 2005 Nadi, Republic of the Fiji Islands Contents Module 2.2 Types of generator systems

More information

Enclosed continuous current (DC) motors MFA - MF. General information

Enclosed continuous current (DC) motors MFA - MF. General information General information Enclosed continuous current (dc) motors MFA (permanent magnets): - frame sizes from 56 to 80 mm, - power 0.075 to 1.3 kw. MF (wound inductors): - frame size 100 and 112 mm, - power

More information

Motor-CAD Software for Thermal Analysis of Electrical Motors - Links to Electromagnetic and Drive Simulation Models

Motor-CAD Software for Thermal Analysis of Electrical Motors - Links to Electromagnetic and Drive Simulation Models Motor-CAD Software for Thermal Analysis of Electrical Motors - Links to Electromagnetic and Drive Simulation Models Dave Staton, Douglas Hawkins and Mircea Popescu Motor Design Ltd., Ellesmere, Shropshire,

More information

Stepper Motor Drive Circuit

Stepper Motor Drive Circuit Stepper Motor Drive Circuit FEATURES Half-step and Full-step Capability Bipolar Constant Current Motor Drive Built-in Fast Recovery Schottky Commutating Diodes Wide Range of Current Control 5-1000mA Wide

More information