US 12,126,277 B2
Control device for power conversion apparatus
Yoshinori Tsuruma, Tokyo (JP); and Kenta Yamabe, Tokyo (JP)
Assigned to TMEIC CORPORATION, Chuo-ku (JP)
Appl. No. 17/755,018
Filed by TMEIC Corporation, Chuo-ku (JP)
PCT Filed Oct. 5, 2020, PCT No. PCT/JP2020/037759
§ 371(c)(1), (2) Date Apr. 19, 2022,
PCT Pub. No. WO2022/074716, PCT Pub. Date Apr. 14, 2022.
Prior Publication US 2022/0385210 A1, Dec. 1, 2022
Int. Cl. H02M 7/53 (2006.01); H02M 1/08 (2006.01); H02M 1/12 (2006.01); H02M 7/539 (2006.01); H02M 1/00 (2006.01)
CPC H02M 7/539 (2013.01) [H02M 1/08 (2013.01); H02M 1/126 (2013.01); H02M 1/0009 (2021.05)] 4 Claims
OG exemplary drawing
 
1. A control device for a power conversion apparatus, the power conversion apparatus having a power converter, a filter, and a switch connected between a DC power supply and an AC power supply in series in order from the DC power supply, the control device comprising:
a calculation unit configured to calculate, from a value of an AC current flowing between the power converter and the filter and a value of impedance of the filter, an estimated value for AC power to be outputted by the power converter; and
a control unit configured to control an action of the power converter in a state where the switch is open such that a difference between a target value for AC power and the estimated value falls within an allowable range set in advance, the target value being calculated based on a value of an AC current flowing between the filter and the switch and a value of an AC voltage applied between the switch and the AC power supply, the control unit being configured to close the switch when the difference between the target value and the estimated value falls within the allowable range set in advance.