Title:
MOTOR DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/079960
Kind Code:
A1
Abstract:
A multiphase pre-driver circuit (40) of a motor drive device is operated by a voltage supplied from a battery (15), and drives a plurality of switching elements (61-66) of an inverter (60). A plurality of motor relays (71, 72, 73) constituted by semiconductor switching elements are each installed between an inter-arm connection point (Nu, Nv, Nw) of each phase and each phase winding (81, 82, 83) of a multiphase motor, and block a current from the multiphase motor (80) side to the inverter (60) side when the motor relays are off. The multiphase pre-driver circuit (40) has a charge pump (43) for boosting the voltage of the battery (15). An output terminal of the charge pump (43) is connected to a gate of the motor relay (71, 72, 73) of each phase. When the charge pump (43) is in operation, the motor relay (71, 72, 73) of each phase is turned ON by an output voltage of the charge pump (43), except when there is a command from a control unit (30).
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Inventors:
NAGURA KOKI (JP)
KABUNE HIDEKI (JP)
KABUNE HIDEKI (JP)
Application Number:
PCT/JP2022/038969
Publication Date:
May 11, 2023
Filing Date:
October 19, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02M7/48; H02P27/06
Foreign References:
| JP2017118641A | 2017-06-29 | |||
| JP2018078498A | 2018-05-17 |
Attorney, Agent or Firm:
HATTORI & PARTNERS (JP)
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