Power conversion apparatus

摘要

A DC link is provided, which includes a capacitor connected in parallel to an output of a converter circuit, and outputs a pulsating DC link voltage. An inverter circuit is provided, which converts an output of the DC link to AC by switching, and supplies the AC to a motor connected thereto. A controller is provided, which controls switching of the inverter circuit so that motor currents pulsate in synchronization with pulsation of a power-supply voltage. The controller controls the switching of the inverter circuit in accordance with a load of the motor or an operational state of the motor, and reduces pulsation amplitude of the motor currents.

主权项

1. A power conversion apparatus comprising:
a converter circuit configured to perform full-wave rectification of a power-supply voltage of an AC power supply; a DC link including a capacitor connected in parallel to an output of the converter circuit and configured to output a pulsating DC voltage; an inverter circuit configured to convert an output of the DC link to AC by switching, and supplies the AC to a motor connected thereto; and a controller configured to control the switching so that currents of the motor pulsate in synchronization with pulsation of the power-supply voltage, wherein the controller controls the switching in accordance with reduction in a load of the motor, and reduces pulsation amplitude of the currents.