| 摘要 |
A DC link (3) is provided, which includes a capacitor (3a) connected in parallel to an output of a converter circuit (2), and outputs a pulsating DC link voltage (v dc ). An inverter circuit (4) is provided, which converts an output of the DC link (3) to AC by switching, and supplies the AC to a motor (7) connected thereto. A controller (5) is provided, which controls switching of the inverter circuit (4) so that motor currents (i u , i v , and i w ) pulsate in synchronization with pulsation of a power-supply voltage (v in ). The controller (5) controls the switching of the inverter circuit (4) in accordance with a load of the motor (7) or an operational state of the motor (7), and reduces pulsation amplitude of the motor currents (i u , i v , and i w ). |
