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Method and system for controlling start of a permanent magnet machine

United States Patent

October 28, 2003
View the Complete Patent at the US Patent & Trademark Office
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Method and system for controlling a permanent magnet machine are provided. The method provides a sensor assembly for sensing rotor sector position relative to a plurality of angular sectors. The method further provides a sensor for sensing angular increments in rotor position. The method allows starting the machine in a brushless direct current mode of operation using a calculated initial rotor position based on an initial angular sector position information from the sensor assembly. Upon determining a transition from the initial angular sector to the next angular sector, the method allows switching to a sinusoidal mode of operation using rotor position based on rotor position information from the incremental sensor.
Walters; James E. (Carmel, IN), Krefta; Ronald John (Noblesville, IN)
Delphi Technologies, Inc. (Troy, MI)
09/ 932,197
August 17, 2001
This invention was made with U.S. Government support through Definitized Subcontract C-HEV-5A under MRI/CHRYSLER Subcontract No. ZAN-6-16334-01 under PRIME CONTRACT NO. DE-AC36-83CH10093 awarded by the Department of Energy, and in accordance with the terms set forth in said contracts, the U.S. Government may have certain rights in the invention.