A program was conducted to develop a state-of-the-art, electronically commutated motor specifically designed for propulsion of electric vehicles with increased range, reduced energy consumption, and reduced life-cycle costs compared with conventional systems. The program was accomplished in two phases involving development and test of (1) a functional model breadboard converter and a rare-earth-cobalt, permanent-magnet (PM) motor, and (2) an engineering model converter and PM motor suitable for vehicle installations. The converter and motor achieved an 88 percent peak efficiency, a maximum output of 26 kW at 26,000 rpm, and a continuous rating of 15 kW. The system also regenerated power to the source during braking, with a demonstrated peak power available at the converter terminals of approximately 26 kW at 88 percent efficiency. Major conclusions included: (1) the SAE J227a(D) driving cycle efficiency for the converter/motor is 86 to 88 percent when energy available for recovery at the converter terminals is included; (2) the converter initial cost is approximately five time that of the permanent magnet motor, but can be reduced by means of LSI logic and integrated liquid-cooled semiconductor packages; and (3) an electronically commutated motor with a liquid-cooded converter will operate reliably without service or maintenance for the life of a passenger vehicle. (ERA citation 08:032005)
Lightweight Electronically Commutated DC Motor for Electric Passenger Vehicles
1982
95 pages
Report
Keine Angabe
Englisch
Electronically Commutated dc Motors for Electric Vehicles
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