Patent ID: 11888388
Assignee: SANDEN CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 0:
1. An electric compressor control device that controls a the electric compressor that has a motor mounted in a vehicle, comprising:
an interlock loop annexed to a connector for connecting the electric compressor to a high-voltage power supply,
an inverter output circuit that converts DC power supplied from the high-voltage power supply to AC power to drive the motor;
a smoothing capacitor connected between the inverter output circuit and the connector,
a voltage detection device that detects a voltage between a power line and a ground line of the connector,
wherein the control device detects connection/disconnection of the connector on the basis of a state of the interlock loop, and in the case where disconnection of the connector is detected, the control device implements a forced discharge operation by controlling the inverter output circuit so as to forcibly discharge, through a winding of the motor, the residual charge accumulated in the smoothing capacitor,
wherein on the basis of an output of the voltage detection device, the control device starts again the forced discharge operation by changing the discharge route in the case where a voltage between the power line and the ground line does not drop to a predetermined value even after the forced discharge operation is implemented.