Sensorless position detection for a brushless direct current...

Details Sensorless position detection for a brushless direct current... Sensorless position detection for a brushless direct current...

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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