Driving circuit and driving method for DC motor
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United States of America Patent
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Dec 29, 2020
Grant Date -
May 16, 2019
app pub date -
Oct 31, 2018
filing date -
Nov 2, 2017
priority date (Note) -
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Abstract
An error detector generates a position error value ERR that corresponds to a difference between a position instruction value P_REF indicative of a target position of a rotor based on a clock signal CLK and a position detection value P_FB indicative of the current position of the rotor based on pulse signals EN_A and EN_B received from an encoder. A feedback controller generates a torque instruction value T_REF such that a position error value ERR approaches zero. The driving IC is capable of switching modes between a rotational driving control mode and a holding mode. Control characteristics set for the feedback controller are switched according to switching between the rotational driving control mode and the holding mode.
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