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公开(公告)号：US20240283384A1
公开(公告)日：2024-08-22
申请号：US18651235
申请日：2024-04-30
Applicant: DENSO CORPORATION
Inventor： KOKI NAGURA , HIDEKI KABUNE
CPC classification number: H02P25/186 , H02P27/06 , H02P2201/07
Abstract: A motor driver includes an inverter, a multiphase pre-driver circuit, a controller and motor relays. The inverter includes pairs of an upper-arm switching element and a lower-arm switching element being connected in series between a ground line and a power supply line, and supplies power to a multiphase motor by converting direct current power of a battery. The multiphase pre-driver circuit drives the upper-arm and lower-arm switching elements. The controller commands the multiphase pre-driver circuit to drive the switching elements, and controls electrical conduction from the inverter to the multiphase motor. The motor relays interrupt a current flowing from the multiphase motor to the inverter during an off state. The multiphase pre-driver circuit includes a charge pump. The motor relays are turned on by an output voltage of the charge pump during an operation of the charge pump in a situation apart from that the controller provides an instruction.
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公开(公告)号：US20240283374A1
公开(公告)日：2024-08-22
申请号：US18651298
申请日：2024-04-30
Applicant: DENSO CORPORATION
Inventor： KOKI NAGURA , HIDEKI KABUNE
IPC: H02M7/5387 , H02M1/08 , H02M1/12
CPC classification number: H02M7/5387 , H02M1/08 , H02M1/126
Abstract: A power converter is connected between a power supply line and a ground line, and the power supply line is connected to a battery. The power converter supplies converted power to a load by converting direct current power of the battery. A control circuit controls the power converter by a voltage applied from the battery. A reverse-connection protective relay is connected to the ground line, and interrupts a current flowing from the ground line to the power supply line via the power converter in a case where the battery is connected in a reverse direction. A voltage required for turning on the reverse-connection protective relay is applied to a gate of the reverse-connection protective relay in a case where the battery is connected in a forward direction, and is not applied to the gate of the reverse-connection protective relay in a case where the battery is connected in the reverse direction.
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公开(公告)号：US20240258947A1
公开(公告)日：2024-08-01
申请号：US18630865
申请日：2024-04-09
Applicant: DENSO CORPORATION
Inventor： KOKI NAGURA , HIDEKI KABUNE
CPC classification number: H02P27/06 , B62D5/04 , H02J7/0063 , H02J2207/20 , H02P2201/07
Abstract: A power converter of a load drive device is provided between a power supply line and a ground line connected to the battery, and converts a direct-current power of the battery and supplies it to a load. A booster circuit boosts a voltage of the battery supplied via the power supply line. A post-boost capacitor is charged with a boosted voltage by the booster circuit. A specific regulator operates a target circuit when a voltage equal to or higher than a lower limit value is applied via a power supply path. At least the voltage charged in the post-boost capacitor is applied to the specific regulator.
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