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 a high speed motor each of which have been fabricated using samarium cobalt permanent magnet material.
- Prepared for Presentation at Soc. Of Automotive Engr. Intern. Congr. And Exposition, Detroit, 23-27 Feb. 1981.
Department of the NavyThe Pentagon
Washington, DC United States 20350
- Maslowski, E A
- Publication Date: 1981
- Pagination: 18 p.
- TRT Terms: Cobalt; Direct current; Electric power conditioning; Electric vehicles; Engine performance; Engines; Fabrication; Magnets; Motors; Thyristors; Vehicle design; Vehicle power plants
- Uncontrolled Terms: Samarium
- Old TRIS Terms: Commutation; Engine design; Power conditioning; Propulsion system performance
- Subject Areas: Design; Energy; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety; I95: Vehicle Inspection;
- Accession Number: 00337030
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: NASA-TM-81654, E-657
- Contract Numbers: DE-AI01-77CS-51044
- Files: TRIS
- Created Date: Jun 12 1981 12:00AM