Electronically commutated dc motors for electric vehicles
A motor development program to explore the feasibility of electronically commutated dc motors (also known as brushless) for electric cars is described. Two different design concepts and a number of design variations based on these concepts are discussed. One design concept is based on a permanent magnet, medium-speed, machine rated at 7000 to 9000 rpm and powered via a transistor-inverter power conditioner. The other concept is based on a permanent magnet, high-speed, machine rated at 22,000 to 26,000 rpm and powered via a thyristor-inverter power conditioner. Test results are presented for a medium-speed motor and for a high-speed motor each of which have been fabricated using samarium-cobalt permanent magnet material.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- DOE Contract Number:
- AI01-77CS51044
- OSTI ID:
- 6615628
- Report Number(s):
- DOE/NASA/51044-14; CONF-810206-6; NASA-TM-81654
- Country of Publication:
- United States
- Language:
- English
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