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US 11,894,790 B2Granted
Motor driving control substrate and motor-driven oil pump
AssigneeNidec Tosok Corporation
InventorYusaku Seki
Life of this patent
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Abstract
A control substrate capable of effectively reducing noise input to a plurality of MOSFETs is provided. The control substrate includes at least three parallel snubber circuits (132, 134, and 135). Each of the parallel snubber circuits (132, 133, and 134) is connected in parallel with each of U-phase MOSFETs (126a and 126b), V-phase MOSFETs (127a and 127b), and W-phase MOSFETs (128a and 128b).
Claims2
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.
5 more elements
Dependencies are inferred from the claim text.