Sensorless position detection for a brushless direct current motor during inverter standby
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United States of America Patent
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Feb 10, 2009
Issued Date -
N/A
app pub date -
Nov 2, 2006
filing date -
Nov 2, 2006
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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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