US 11,736,025 B2
Electrical power conversion apparatus
Kei Hayase, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Sep. 29, 2021, as Appl. No. 17/488,943.
Claims priority of application No. 2020-188415 (JP), filed on Nov. 12, 2020.
Prior Publication US 2022/0149742 A1, May 12, 2022
Int. Cl. H02M 3/335 (2006.01); H02M 1/088 (2006.01); H02M 1/32 (2007.01); H02M 1/42 (2007.01); H02M 7/48 (2007.01); H02M 7/219 (2006.01); H02M 5/458 (2006.01); H02M 7/537 (2006.01); H02M 7/5387 (2007.01)
CPC H02M 3/33573 (2021.05) [H02M 1/088 (2013.01); H02M 1/327 (2021.05); H02M 1/4233 (2013.01); H02M 5/4585 (2013.01); H02M 7/219 (2013.01); H02M 7/48 (2013.01); H02M 7/537 (2013.01); H02M 7/5387 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An electrical power conversion apparatus, comprising:
an alternating current/direct current converter for converting alternating current power from an alternating current power source into direct current power;
a direct current/direct current converter, being connected on a direct current side of the alternating current/direct current converter, for performing voltage conversion of direct current power thereon;
a direct current capacitor, being connected between the alternating current/direct current converter and the direct current/direct current converter, for smoothing electric power therebetween; and
a control circuit for controlling the alternating current/direct current converter and the direct current/direct current converter, the electrical power conversion apparatus, wherein
the control circuit is configured to:
generate an output current instruction of the direct current/direct current converter by performing superposition of an alternating current instruction, taking on a minimum value at a zero-crossing phase of the alternating current power source and taking on a maximum value at a peak phase thereof, on a direct current instruction, and
perform an output control on the direct current/direct current converter by using the output current instruction,
wherein the electrical power conversion apparatus further comprises a direct current capacitor temperature acquisition device for acquiring ambient temperature of the direct current capacitor, and
wherein the control circuit is further configured to determine an amplitude of said alternating current instruction in accordance with temperature information obtained from the direct current capacitor temperature acquisition device.