US 12,413,140 B2
Power converter and control method for power converter
Hiroya Natsuhara, Tokyo (JP); Isao Kezobo, Tokyo (JP); Tatsuya Mori, Tokyo (JP); Chiaki Fujimoto, Tokyo (JP); Atsushi Ito, Kobe (JP); and Yusuke Takarada, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 18/269,339
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Apr. 14, 2021, PCT No. PCT/JP2021/015384
§ 371(c)(1), (2) Date Jun. 23, 2023,
PCT Pub. No. WO2022/219733, PCT Pub. Date Oct. 20, 2022.
Prior Publication US 2024/0136915 A1, Apr. 25, 2024
Prior Publication US 2024/0235379 A9, Jul. 11, 2024
Int. Cl. H02M 1/32 (2007.01); B62D 5/04 (2006.01); H02M 1/00 (2006.01); H02M 1/084 (2006.01); H02M 7/48 (2007.01); H02M 7/537 (2006.01); H02M 7/5387 (2007.01)
CPC H02M 1/325 (2021.05) [H02M 1/0009 (2021.05); H02M 1/084 (2013.01); H02M 7/537 (2013.01); B62D 5/0487 (2013.01); H02M 1/32 (2013.01); H02M 7/48 (2013.01); H02M 7/5387 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power converter comprising:
a multiphase inverter circuit comprising a plurality of switching elements;
a plurality of current sensors each configured to detect a current of a respective phase of the inverter circuit and output a value of the current detected;
a terminal voltage detector configured to detect a voltage of each terminal of a load connected to the inverter circuit and output a value of the voltage detected;
a switching element drive circuit configured to control the plurality of switching elements of the inverter circuit according to a switching pattern given;
a fault detector configured to detect a fault in the inverter circuit or the plurality of current sensors; and
a fault identifier configured to, after the fault detector detects the fault, switch the switching pattern to be given to the switching element drive circuit according to types of faults detectable by the fault detector, and perform fault identification processing of identifying a type and a location of the fault in the inverter circuit or the plurality of current sensors based on the value of the current detected by at least one of the plurality of current sensors or the value of the voltage detected by the terminal voltage detector during the control according to the switching pattern.