Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2006-11-02
2009-02-10
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S400340, C318S459000
Reexamination Certificate
active
07489097
ABSTRACT:
A method of controlling a brushless direct current motor without a position sensor. The motor includes a plurality phase windings adapted to be energized by an active inverter circuit that synchronously applies drive voltages through a plurality of phases to produce drive currents in the phase windings. Back electromotive force voltages are detected when the inverter circuit is inactive for sensorless detection of motor position.
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Fu Zhenxing
Li JingChuan
Weinschenker Lars
Bayerische Motoren Werke Aktiengesellschaft
Chrysler LLC
Daimler AG
Duda Rina I
GM Global Technology Operations Inc.
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