POWER CONVERSION DEVICE, MOTOR DRIVE DEVICE, REFRIGERATION CYCLE DEVICE, BLOWER, AIR CONDITIONING EQUIPMENT, AND REFRIGERATION EQUIPMENT

WIPO Patent Application WO/2020/183743

A1

The purpose of the present invention is to suppress flowing current particularly in a high-load operation region in order to deal with an operation region spanning a wide range, and improve the efficiency of the system. The present invention provides a power conversion device (101) comprising: a bridge circuit (40) for rectifying AC power into DC power, the bridge circuit (40) being provided with a plurality of legs comprising an upper arm and a lower arm configured from a semiconductor switch or a diode; a capacitor (6) for smoothing the DC power; an integrated magnetic component (3) having one end connected to one end of an AC power source and the other end connected to connection points between the upper arms and the lower arms; a current detector (41) for detecting the current of the AC power source or a current correlated with the current of the AC power source; a voltage detector (31) for detecting the voltage of the DC power or a voltage correlated with the voltage of the DC power; and a control unit (11) for controlling the opening/closing of the semiconductor switch. On the basis of the value detected by the current detection unit and/or the value detected by the voltage detection unit, the control unit switches the conduction mode of the semiconductor switch and changes the current pattern flowing to the integrated magnetic component.

ARISAWA KOICHI (JP)
UEMURA KEISUKE (JP)
TAKAHARA TAKAAKI (JP)

PCT/JP2019/022780

September 17, 2020

June 07, 2019

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MITSUBISHI ELECTRIC CORP (JP)

F25B1/00; H02M7/219; H01F37/00; H02M7/12

WO2018116437A1

2018-06-28

TAKAMURA, Jun (JP)

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