Motor drive device and electric vehicle system
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United States of America Patent
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Jan 24, 2023
Grant Date -
N/A
app pub date -
Sep 12, 2019
filing date -
Oct 15, 2018
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor drive device includes a power conversion circuit that drives an AC motor and a controller that controls the power conversion circuit. The controller includes a command current calculation unit generating a command current according to command torque for the AC motor and a current control unit that performs feedback control for adjusting a current applied to the AC motor to the command current. The controller also includes a control gain setting unit that calculates a control gain used for the feedback control based on the command torque and sets the calculated control gain in the current control unit. The control gain setting unit performs control such that a time from a decrease of an absolute value of the command torque to switching of the control gain is longer than a time from an increase of the absolute value of the command torque to switching of the control gain.
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