Patent ID: 11894790
Assignee: NIDEC TOSOK CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H | IPC H

Claim 0:
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.