Development of HTS Motor - Present Status and Future Prospect /12/4 Kazuhiko Hayashi Sumitomo Electric Industries, Ltd.

Transcription

1 CCA08 1 Development of HTS Motor - Present Status and Future Prospect /12/4 Kazuhiko Hayashi Sumitomo Electric Industries, Ltd.

2 Ship Propulsion Motor-Axial Gap Type Advantage; (1)Simple cooling system (2)Brushless system (3)Stator or Rotor can be fixed (not rotating) (4)High reliability (5)Motor power can be obtained from both end of spindle 2 HTS Field Winding Stator (HTS Armature Winding) Rotary Joint LHe, LNe Coolant Rotor (Permanent magnet or HTS Coil) LN 2 Coolant

3 365 kw HTS Motor (FY2007) Axial gap permanent magnet type SC synchronous motor Includes two 8 poles and one 6 armature HTS windings (BSCCO coil) PM (rotating field) avoids slip ling and brush, Sub-cooled LN 2 system 3 Motor flame Motor spindle LN 2 Inlet/Outlet Rotor (Field Pole) Permanent Magnet Back York Cryostat for Armature 6 HTS Coil FLC (Flux Collector) Diameter :1.2 m Length : 0.8 m Weight : 4.4 tons Power Cable Joint

4 DI-BSCCO Coil for Armature winding Iron core (FLC) 4 W V U U V W Double pancake coil (DPC) The armature composes of six iron-cored HTS windings and form 3 phases. Coil for armature is a stack of 14 double-pancake coils with DI-BSCCO. The windings are impregnated by epoxy and fixed to withstand electromagnetic force and mechanical vibration. Heat generated by AC loss (rated frequency ~ 16.7 Hz) is quickly transferred into the LN 2 through the cooling channel.

5 Specifications of 365 kw HTS Motor Trial Motor tests: Electro motive force test L to L EMF: 446 V at 250 rpm Four-quadrant operation can be accelerated smoothly Load test torque vs. current was liner small temperature rise stable operation for long time 5 Overview of 365 kw HTS Motor Output: 365 kw Rotation speed: 250 rpm Rated frequency: 16.7 Hz Rated Torque: 1.4x10 4 Nm Torque density: 1.8x10 4 Nm/m 3

6 800kW Contra Rotating Thruster 400kW-250rpm HTS Motors Gear-Less Contra-Rotating Propeller 6 Extremely Low- Noise & Vibration Cooling System The world s first SC propulsion unit for directly driving a contra-rotating propeller is presently being constructed by connecting the newly developed 365-kW HTS motor in tandem with a 50-kW HTS motor developed last year.

7 Contra Rotating Demo System 7 400kW-250rpm HTS Motors 50kW-250rpm HTS Motors

8 Acknowledgement 8 A Japanese frontier collaborative research group Organization (alphabetical order) IHI Corporation Fuji Electric Systems Co., Ltd. Hitachi, Ltd. Nakashima Propeller Co., Ltd. Niigata Power Systems Co., Ltd. Sumitomo Electric Industries, Ltd. Taiyo Nippon Sanso Corporation University of Fukui (Professor H. Sugimoto) Role Project management Electric power system design and supply Electric power system design Propeller design and supply Pod propulsion mechanical design and supply High-temperature superconducting coil design and supply Cooling system design and supply Electric and magnetic circuit design

9 Trial Manufactured Electric Vehicle 1,2 9 Electric Vehicle 1 Electric Vehicle 2

10 System Configuration 10 Conventional System Superconducting System Battery Current Motor Battery Cooler Current HTS Motor Transmission High Torque Reduction of Transmission Loss

11 Superconducting motor 11

12 Components of Superconducting Motor - Claw Pole Type DC Motor - 12 Superconductor Coil Superconducting Coil Rotor Core iron Iron core

13 Performance of the superconducting Electric Vehicle 2 13 Items Performance Maximum torque (1,500rpm) 120Nm Maximum output (3,100rpm) 31kW Maximum speed (3rd gear) 85km/h Cruising distance (at 30km/h) 60km

14 Fuel Cell Vehicle with Liquid H2 Cooled Motor) 14 Battery SMES Battery/ SMES SMES CurrentCurrent feed/ regeneration Hydrogen (Fuel) Fuel cell Current LqH 2 Hydrogen (Coolant)

15 Wire Requirements for Rotating 15 Machine DC coil (Field Winding) or AC coil (Armature Winding) --- AC case: Low AC Loss Operating Temperature As high as possible With iron core or without iron core? High temp & high field operation Coated conductor Rotating or statistics? Rotating : Good mechanical strength against electro-magnetic and centrifugal force

16 For Q&A 16

17 12.5 kw HTS motor for Demonstration (FY2005) HTS field winding type HTS Motor Pod Propulsion System 0.6mφ 0.6m 0.8mφ 2m 12.5 kw,100 rpm Propeller 1mφ (154mmφ x 16) 17 Image of Real Use

18 12.5 kw All HTS Motor (FY2005) World s first LN 2 cooled inductive-type flux control SC motor Inductors, directly connected to the spindle, were used between HTS field and HTS armature windings HTS Field Winding LN 2 in/out All HTS Motor 0.5mφ LN 2 operation 18 LN 2 in/out All HTS Coils: Field and Armature Not rotated HTS Armature Winding Inductor High reliability and less maintenance were demonstrated with this compact all HTS motor

19 DI-BSCCO Wire for Armature Coil 19 Width 4.2±0.2 mm Thickness 0.22±0.02 mm Length 1500 m max. Critical current (77K, self-field) >120 A (130A ~ 140A) Maximum tensile strength (RT) 100 MPa Maximum tensile strength (77K) 135 MPa Minimum bending diameter (RT) 70 mm Insulation Polyimide (Kapton) Excellent insulation ~ 1kV over all surface

20 Specifications (Vehicle 1) 20 Wire type Type H (polyimide film insulated) Wire Coil Motor Dimensions Critical current (Ic) Maximum tensile strength (77K) Minimum bend radius (room temperature) Shape Turns Motor type Coil refrigeration method Maximum voltage Maximum current Dimensions Weight 4.2 x 0.22 mm 140 A 150 Mpa 70 mm Inner dia.: 186 mm Outer dia.: 210 mm Width: 40 mm 186 turns / coil Series-wound DC (field superconductor) Liquid nitrogen immersion 144 V 500 A 267 (dia.) x 370 (height) mm About 70 kg

21 Performance of the superconducting electric vehicle 1 21 Vehicle Performance Items Maximum torque (1,000 rpm) Maximum output (4,500 rpm) Maximum speed (3rd gear) Cruising distance (at 30 km/hr on test site) Performance 70 Nm 18 kw Above 70 km/hr 36 km

22 Superconducting Motor Fitted Inside Vehicle 1 22

23 Test drive 23