US 11,894,790 B2
Motor driving control substrate and motor-driven oil pump
Yusaku Seki, Kanagawa (JP)
Assigned to NIDEC TOSOK CORPORATION, Kanagawa (JP)
Filed by NIDEC TOSOK CORPORATION, Kanagawa (JP)
Filed on Dec. 14, 2020, as Appl. No. 17/120,272.
Claims priority of application No. 2019-238197 (JP), filed on Dec. 27, 2019.
Prior Publication US 2021/0203265 A1, Jul. 1, 2021
Int. Cl. H02M 1/34 (2007.01); H02P 27/06 (2006.01); H02P 29/02 (2016.01); H02P 29/00 (2016.01)
CPC H02P 29/00 (2013.01) [H02P 27/06 (2013.01); H02P 29/02 (2013.01); H02M 1/34 (2013.01); H02M 1/348 (2021.05)] 2 Claims
OG exemplary drawing
 
1. A motor driving control substrate comprising:
a first-phase switching element pair comprising a pair of switching elements connected in series and configured to individually turn on/off outputs of a first phase in a three-phase power supply;
a second-phase switching element pair comprising a pair of switching elements connected in series and configured to individually turn on/off outputs of a second phase in the three-phase power supply;
a third-phase switching element pair comprising a pair of switching elements connected in series and configured to individually turn on/off outputs of a third phase in the three-phase power supply; and
a snubber circuit,
wherein the snubber circuit comprises parallel snubber circuit connected in parallel with each of the first-phase switching element pair, the second-phase switching element pair, and the third-phase switching element pair,
wherein the number of the parallel snubber circuits is at least three, and
wherein each of the at least three parallel snubber circuits comprises a plurality of snubber capacitors that are connected in parallel and have different electrostatic capacitances.