Variable link sensorless brushless direct current motor controller for space and hardened applications
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United States of America Patent
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Sep 13, 2016
Grant Date -
Aug 28, 2014
app pub date -
Feb 22, 2013
filing date -
Feb 22, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A sensorless motor controller includes a variable link control, including a radiation-hardened field programmable gate array (FPGA) and a back electromotive force (EMF) decoder circuit. The back EMF decoder infers the position of a rotor of the motor. A filter on the decoder conditions the back EMF signal and has multiple cutoff frequencies which can be dynamically controlled by the FPGA in order to compensate for phase shift in the back EMF signal. The FPGA also controls a variable DC link and its digital speed control loop.
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