Controller for AC electric motor
AssigneeFuji Electric Co., Ltd.
InventorHirokazu Tajima
Life of this patent
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Abstract
A controller for an AC electric motor includes an acquirer that acquires at least one of a frequency of an output voltage of a power converter and an estimated value of a rotational speed of the AC electric motor, and a frequency component remover that removes a predetermined frequency component from an acquired value by feedforward control, using the acquired value acquired by the acquirer as an input value.
Claims10
A controller for an AC electric motor that controls driving of the AC electric motor based on a voltage command value set based on one of a torque command value and a speed command value for driving the AC electric motor and a current detection value at which a current that flows to the AC electric motor during the driving of the AC electric motor is detected, comprising:
- a power converter that drives the AC electric motor;
- an acquirer that acquires at least one of a frequency of an output voltage of the power converter and an estimated value of a rotational speed of the AC electric motor based on the voltage command value and the current detection value;
- and
- a frequency component remover for performing feedforward control so that a predetermined frequency component is removed from an acquired value acquired by the acquirer as an input value.
A controller for an AC electric motor that controls driving of the AC electric motor based on a voltage command value set based on one of a torque command value and a speed command value for driving the AC electric motor and a current detection value at which a current that flows to the AC electric motor during the driving of the AC electric motor is detected, comprising:
- a control unit;
- and
- a power converter that drives the AC electric motor,
- wherein the control unit acquires at least one of a frequency of an output voltage of the power converter and an estimated value of a rotational speed of the AC electric motor based on the voltage command value and the current detection value, and removes a predetermined frequency component from an acquired value by feedforward control based on the acquired value.
Dependencies are inferred from the claim text.