CONTROL APPARATUS OF THREE-PHASE AC MOTOR
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United States of America Patent
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Issued Date -
Dec 7, 2023
app pub date -
May 24, 2023
filing date -
Jun 1, 2022
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Abstract
A position control apparatus detects currents of processing object phases which flow through the three-phase AC motor, applies offset compensation processing to current detected values of the processing object phases based on offset compensation amounts, and controls the three-phase AC motor based on the current detected values of the processing object phases after the offset compensation processing. Processing of obtaining the offset compensation amounts includes processing of obtaining a Fourier coefficient of a frequency component of a torque ripple based on a torque command value signal, processing of obtaining torque amplitude components of the processing object phases, and processing of obtaining the offset compensation amounts with respect to the processing object phases based on the torque amplitude components of the processing object phases.
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