RESEARCH OF PERMANENT MAGNET GENERATOR WITH COMPENSATED REACTANCE WINDING

Transcription

1 RESEARCH OF PERMANENT MAGNET GENERATOR WITH COMPENSATED REACTANCE WINDING Authors: Vincent Monet Oleg Lyan Supervisors: Prof. dr. Eleonora Guseinovienė Boris Rudnickij Klaipeda 2013 TEI-09 Department of Electrical Engineering 1

2 THE AIM Research the type of patented PMG, which is claimed to have significant internal circuit reactance compensation by winding special coils and construction of before unseen machine Patent: Pašilis, Aleksas Alfonsas and Guseinovienė, Eleonora. Bifilar type generator or motor. LT Lithuania, March 12, Electric Machines. 2

3 THE TASKS Overview of present PMG s Review of patent Design of patented PMG Magnetic analysis Conduction of experiments Data analysis Plot of characteristics Calculation of parameters Conclusion 3

4 Overview of Present PMGs Radial-flux permanent magnet generator with Internal Rotor : Advantages : high torque/power capability, good heat conduction, cooling properties, a high efficiency and a power/weight ratio. Disadvantage: the magnets have to be implanted carefully so that the rotor does not fly apart. Applications: low and medium power, wind turbine, high power. Alxion : from to W/Kg at a rated speed of 1500 rpm. MOOG : from to W/Kg at a rated speed of 1200 rpm. As example, here is characteristics taken from the Alxion and MOOG catalogues 4

5 Overview of Present PMGs Radial-flux permanent magnet generator with External Rotor: Advantages: very efficient, low-cost, easy to manufacture. Applications: hard disk drives, small computer ventilation fans, some blowers, low-power applications such as wind generator. 5

6 Overview of Present PMGs Axial flux permanent magnet generator : The gravimetric power density of this prototype at a rated speed of 840 rpm is W/Kg Advantages: can be designed to have a higher power/weight ratio resulting of the less core material and a higher efficiency Applications : low and medium power Such as wind turbine high power. 6

7 Overview of Present PMGs (1) Stator core holder. (2) Stator core. (3) Armature winding. (4) Rotor Disk. (5) Permanent Magnet. 7

8 Patented PMG theory illustrations Figure 1. A Rod of 0,25-0,4mm silicone iron laminations. Figure 2. Attached another rod with permanent magnets. 1. Permanent magnets; 2. Wound coils; 3. Stator ferromagnetic core rods; 4. Magnetic flux direction; 5. Iron or steel nonlaminated core. 8

9 Patented PMG illustrations of construction, hybrid flux topology Figure 3. Axial section view. Figure 4. Cross section view, positioning the coils, rods and magnets..6. Plastic or other nonmagnetic magnetic material. 7. Shaft. Advantages: 1. Smallest possible air gap. 2. Core is not toroid, which is easily wound with coils. 3. Number of cores is unlimited. 4. High torque slow running machines. 9

10 Rotor Interaction with Stator 10

11 Axial Flow of Flux 11

12 Real prototype construction of patented PMG 2 rotors 80 magnets 15 Ferromagnetic rods 30 coils 12

13 Experimental Stand Stand for the no-load Stand for the load 13

14 Electric Load Schematic 14

15 EXPERIMENTAL DATA ANALYSIS 15

16 Efficiency, % Efficiency vs. Load Current Characteristic Measured Calculated ,80 Hz 56,50 Hz 44,08 Hz 28,80 Hz 22,89 Hz 17,80 Hz 14,14 Hz 11,08 Hz 8,75 Hz 0 0,0 0,5 1,0 1,5 2,0 2,5 Current, A 0,0 0,5 1,0 1,5 2,0 2,5 Current, A 16

17 Parameters of the prototype Parameters Symbol Generator types Fig. 2.7 Fig. 1.5 Table. 1.1 Load current 1,65 3,2 Output power Rated speed No-Load EMF Voltage at rated power Efficiency 92, Rated Power factor 0,69 Total mass 55 8,5 10,4 Output power per active mass 38,4 117,65 125,67 Output power per volume 138 Number of rotors 2 7 Number of poles (pair poles) 20 (10) 12 12(6) Number of coils 30 9 Number of loops per coil Active diameter 150 Rotor inertia 29,58 2,24 Phase armature resistance 8,7 8,6 Phase synchronous reactance 186,7 Phase inductance 442,

18 Conclusions & Recommendations 18

19 Conclusions & Recommendations Preliminary measured compensation of reactance is almost twice as each part of generator would separately have. Future plan for generator: Connect different types of loads for more accurate and rich analysis; Test different coil configurations; Test generator parts separately to discover the effect and describe the difference; Make a Simulink MATLAB model; Describe in equations and theory. Preliminary parameters can be modeled by a special simulation program EMS add-on for SolidWorks. 19

20 Gratitude MITA (Agency of Science, Innovation and Technology) for VP2-1.3-ŪM-05-K Inočekiai LT (Innovation checks) growing economics program for supporting project Research of innovative bifilar type electric generator or motor. EMWorks (ElectroMagneticWorks Inc.) for trial license of software EMS, a SolidWorks add-on for electromagnetic analysis and simulation studies. 20

21 Thank You for Attention 21