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AssigneeHitachi-Johnson Controls Air Conditioning, Inc.
InventorsDongsheng LI, Yoshitaka IWAJI, Yasuo NOTOHARA, Yuuji YAMAMOTO
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The purpose of the present invention is to suppress current distortion due to load-side AC voltage, magnetic saturation (nonlinear) characteristics of a motor, etc., in a power conversion device and a motor drive device. A power conversion device for performing power conversion between an AC power supply and a DC loader between DC power supplies is provided with: an inverter circuit; a current detection means for detecting the AC current of the AC power supply; a voltage controller for generating a command voltage for the inverter circuit on the basis of an AC current signal detected by the current detection means; and a correction unit having a gain with respect to a specific frequency and correcting the command voltage on the basis of the AC current signal. The correction unit is configured to correct the command voltage that has been output from the voltage controller.
A power conversion device that performs power conversion between an alternating-current source and one of a direct-current load and a direct-current power supply, comprising:
-4. (canceled)
A motor drive device having an inverter circuit to convert a direct voltage into an alternating voltage and current detection means for detecting an alternating current as output from the inverter circuit, the motor drive device comprising:
-10. (canceled)
Dependencies are inferred from the claim text.