US 11,799,390 B2
Switching device, switching power supply apparatus, and vehicle having zero-crossing point detection time correction
Yuji Kodera, Kanagawa (JP); Yuji Shibano, Tokyo (JP); Reiji Tominaga, Kanagawa (JP); Shuji Harimoto, Kanagawa (JP); Satoshi Tomie, Osaka (JP); and Takao Miyamoto, Nara (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Mar. 29, 2021, as Appl. No. 17/215,837.
Claims priority of application No. 2020-060588 (JP), filed on Mar. 30, 2020.
Prior Publication US 2021/0305908 A1, Sep. 30, 2021
Int. Cl. H02M 7/06 (2006.01); B60L 53/22 (2019.01); H02M 7/04 (2006.01); H01H 9/56 (2006.01); H02M 1/32 (2007.01)
CPC H02M 7/062 (2013.01) [B60L 53/22 (2019.02); H01H 9/56 (2013.01); H02M 7/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A switching device provided with a plurality of power conversion circuits respectively corresponding to phases of a multiple-phase power supply as an external power supply, the switching device comprising:
a switching circuit that includes a switching relay capable of switching a connection destination of a first power conversion circuit, different from a second power conversion circuit of the plurality of power conversion circuits, between a first phase corresponding to the first power conversion circuit and a second phase of the external power supply, the second power conversion circuit corresponding to the second phase of the external power supply; and
a controller that controls an operation of the switching relay at a zero-crossing time of an AC voltage estimated based on the AC voltage,
wherein the controller calculates, based on the AC voltage, a detection delay time from a zero-crossing of the AC voltage to detection of a zero-crossing point of the AC voltage by the controller, corrects a zero-crossing point detection time at which the controller has detected the zero-crossing point of the AC voltage using the detection delay time, and controls the operation of the switching relay at a corrected zero-crossing point detection time.