POWER CONVERTING APPARATUS, MOTOR DRIVE APPARATUS, AND REFRIGERATION-CYCLE APPLICATION DEVICE

Abstract: a power converting apparatus includes: a rectifier unit rectifying first alternating-current power supplied from a commercial power supply; a capacitor connected to an output end of the rectifier unit; an inverter connected across the capacitor, the inverter generating second alternating-current power and outputting the second alternating-current power to a motor; a voltage detecting unit detecting a first direct-current bus voltage, the first direct-current bus voltage being a voltage across the capacitor; and a control unit including a specific frequency bandpass unit passing a defined frequency band among power-supply pulsatile components contained in the first direct-current bus voltage, the control unit controlling an operation of the inverter and the motor by using a second direct-current bus voltage, the second direct-current bus voltage being the first direct-current bus voltage after passing through the specific frequency bandpass unit.

Inventor(s): Koichi ARISAWA, Kengo KAWAUCHI, Takaaki TAKAHARA, Tomohiro KUTSUKI, Haruka MATSUO

CPC Classification: H02M7/537 (using devices of a triode or transistor type requiring continuous application of a control signal {(, and take precedence)})

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