Motor drive controller and method for controlling motor
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United States of America Patent
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Aug 28, 2018
Grant Date -
Sep 22, 2016
app pub date -
Mar 15, 2016
filing date -
Mar 17, 2015
priority date (Note) -
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Abstract
A motor drive controller includes: an advance-angle reference voltage generator that generates an advance-angle reference voltage; a back electromotive voltage comparator that generates phase signals of phases at a cross timing of the advance-angle reference voltage and back electromotive voltages of phases of a motor; and a controller that operates to perform a process including: detecting a rotation speed of the motor based on the phase signals of the phases; increasing the advance-angle reference voltage when the rotation speed moves from a high speed to a low speed; and decreasing the advance-angle reference voltage when the rotation speed moves from a low speed to a high speed.
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