US 12,334,814 B2
Power converter
Kenji Fujiwara, Tokyo (JP); and Yusuke Shirouchi, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/270,488
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Feb. 25, 2021, PCT No. PCT/JP2021/006973
§ 371(c)(1), (2) Date Jun. 30, 2023,
PCT Pub. No. WO2022/180709, PCT Pub. Date Sep. 1, 2022.
Prior Publication US 2024/0063730 A1, Feb. 22, 2024
Int. Cl. H02M 1/32 (2007.01); H02M 1/00 (2007.01); H02M 7/00 (2006.01); H02M 7/483 (2007.01); H02M 7/487 (2007.01)
CPC H02M 1/327 (2021.05) [H02M 7/003 (2013.01); H02M 1/007 (2021.05); H02M 7/4835 (2021.05); H02M 7/487 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A power converter comprising:
a full-bridge inverter constituted by two arms each of which is mounted on a different module;
a main controller to drive the full-bridge inverter by switching an operation mode on a basis of a set operation ratio between a first mode and a second mode, the first mode being a mode in which a first arm of the two arms is made to perform a switching operation at a first frequency for determining output polarity and a second arm is made to perform a switching operation for PWM modulation at a second frequency higher than the first frequency, the second mode being a mode in which the second arm is made to perform a switching operation at the first frequency and the first arm is made to perform a switching operation at the second frequency; and
an operation ratio setting circuitry to set the operation ratio on a basis of a bias of a temperature rise between the modules.