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:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
H02M7/48; H02M7/12
Foreign References:
JP2018061422A | 2018-04-12 | |||
JP2003189689A | 2003-07-04 | |||
JP2010136492A | 2010-06-17 | |||
JP2016082680A | 2016-05-16 | |||
JP6265297B1 | 2018-01-24 | |||
JP5874800B1 | 2016-03-02 |
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
See also references of EP 3859963A4
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
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