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Electronically commutated dc motors for electric vehiclesA 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.
Document ID
19810006949
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Maslowski, E. A. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1981
Subject Category
Energy Production And Conversion
Report/Patent Number
E-657
NASA-TM-81654
DOE/NASA/51044-14
Report Number: E-657
Report Number: NASA-TM-81654
Report Number: DOE/NASA/51044-14
Meeting Information
Meeting: Soc. of Automotive Engr. Intern. Congr. and Exposition,
Location: Detroit, MI
Country: United States
Start Date: February 23, 1981
End Date: February 27, 1981
Accession Number
81N15464
Funding Number(s)
CONTRACT_GRANT: DE-AI01-77CS-51044
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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