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Patent Searching and Data


Title:
DIRECT POWER CONVERTER AND CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/066867
Kind Code:
A1
Abstract:
According to the present invention, an input power factor of this direct power converter is improved. The present invention controls the direct power converter comprising: a converter which rectifies a single-phase AC voltage, converts AC power to DC power, and outputs first instantaneous power; a power buffer circuit which transfers power between the converter and a DC link and buffers the power with a second instantaneous power; and an inverter which converts a DC voltage in the DC link to a second AC voltage and outputs the converted AC voltage. A period during which a current flowing from the converter to the power buffer circuit continuously flows for less than half a cycle of the AC voltage when an average value of third power input to the inverter, fourth power output by the inverter, or first instantaneous power is less than a first threshold, is longer than that that when the average value of the third power, the fourth power, or the first instantaneous power is equal to or more than a second threshold that is equal to or more than the first threshold.

Inventors:
SAKAKIBARA KENICHI (JP)
Application Number:
PCT/JP2019/036885
Publication Date:
April 02, 2020
Filing Date:
September 20, 2019
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
International Classes:
H02M7/48; H02M7/12
Foreign References:
JP2018061422A2018-04-12
JP2003189689A2003-07-04
JP2010136492A2010-06-17
JP2016082680A2016-05-16
JP6265297B12018-01-24
JP5874800B12016-03-02
Other References:
"Single-Phase Twice voltage PFC Converter for air conditioner", IEEJ TRANSACTIONS ON INDUSTRY APPLICATIONS, vol. 119, no. 5, 1999
See also references of EP 3859963A4
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
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