US 12,081,127 B2
Power conversion device
Yu Kawai, Tokyo (JP); and Hirokazu Nakabayashi, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/619,604
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Aug. 21, 2019, PCT No. PCT/JP2019/032678
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2021/033295, PCT Pub. Date Feb. 25, 2021.
Prior Publication US 2022/0368232 A1, Nov. 17, 2022
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/1582 (2013.01) [H02M 1/0058 (2021.05); H02M 3/1586 (2021.05)] 8 Claims
OG exemplary drawing
 
1. A power conversion device comprising:
a switching circuit to receive an input voltage to output an output voltage, the switching circuit including a reactor;
a signal generator to generate a switching signal of a switching element included in the switching circuit based on a first instruction value;
a current controller to generate a second instruction value based on a deviation between a current target value and the current flowing through the switching circuit such that the current flowing through the switching circuit approaches the current target value;
an operation mode detector to detect an operation mode of the switching circuit based on the first instruction value; and
a compensator to adjust the second instruction value so as to compensate a gain that is a ratio between the deviation and an amount of a change in the current of the switching circuit,
wherein the compensator is configured to adjust the second instruction value so as to suppress a change in the gain based on the operation mode detected by the operation mode detector, and outputs the first instruction value, and the current flowing through the switching circuit is determined using the input voltage, the output voltage, the first instruction value, and reactance of the reactor.