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Patent Searching and Data


Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/079919
Kind Code:
A1
Abstract:
Provided is a power conversion device for converting input alternating-current power supplied from an alternating-current power supply into output alternating-current power of a predetermined voltage and frequency. The power conversion device is provided with an inverter circuit for supplying the output alternating-current power to a motor, and a compensating unit for compensating harmonics of input power to the motor. The compensating unit detects a harmonics component that is generated in the input power in synchronism with the rotational speed of the motor, and causes the phase of an alternating-current voltage output from the inverter circuit to vary at the same frequency as the harmonics component so as to reduce the harmonics component.

Inventors:
MIYAJIMA TAKAYUKI (JP)
Application Number:
PCT/JP2020/039624
Publication Date:
April 29, 2021
Filing Date:
October 21, 2020
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
International Classes:
H02M7/48
Domestic Patent References:
WO2008139518A12008-11-20
Foreign References:
JP2012165634A2012-08-30
JPH0454872A1992-02-21
JP2012016276A2012-01-19
JPH05176584A1993-07-13
JP2000287481A2000-10-13
JPH1189297A1999-03-30
JP2010239681A2010-10-21
JP2009044873A2009-02-26
JP2016208668A2016-12-08
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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