Control of a brushless motor
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United States of America Patent
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Sep 1, 2015
Grant Date -
Oct 20, 2011
app pub date -
Apr 13, 2011
filing date -
Apr 16, 2010
priority date (Note) -
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Abstract
A method of controlling a brushless motor that includes exciting a winding of the motor with a voltage, and freewheeling the winding when current in the winding exceeds a threshold or after the winding has been excited for a timeout period. The timeout period is adjusted in response to a change in one of the voltage and the motor speed. Additionally, a control system that implements the method, and a motor system that incorporates the control system.
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