Drive control device of a brushless DC motor
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United States of America Patent
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Nov 21, 2017
Grant Date -
Aug 11, 2016
app pub date -
Feb 3, 2016
filing date -
Feb 9, 2015
priority date (Note) -
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Abstract
A drive control device of a motor includes a comparison unit for comparing a first voltage value, which increases or decreases depending on a current value obtained in an inverter unit of the motor, with a reference voltage value, and an arithmetic processing unit for determining presence or absence of an overcurrent based on a comparison result of the comparison unit. The arithmetic processing unit includes a first terminal and a second terminal. The comparison result of the comparison unit is inputted to the first terminal. The second terminal receives the input of the first voltage value and outputs an operation confirmation signal to the comparison unit at predetermined timings. The arithmetic processing unit determines an overcurrent state based on the first voltage value and determines a state of the first terminal based on an output timing of the operation confirmation signal from the second terminal.
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