Jing-jin Electric Technologies Co., Ltd.

Fuxiang Wan

Dongping Gu

Yuxia Qu

Renjun Dong

Gabriel Gallegos

Shuanglai Dong

Lingling Tan

An insulation monitoring electric circuit of an electric-motor controller, includes: a first voltage sampling circuit and a second voltage sampling circuit; the first voltage sampling circuit is connected to an input anode (+VBUS) of a busbar, an input cathode (PGND) of the busbar and a busbar-voltage sampled-signal (HV_VDC) line, and a busbar-voltage sampled-signal (HV_VDC) line is connected to the electric-motor controller; the second voltage sampling circuit is connected to the input anode (+VBUS) of the busbar, the input cathode (PGND) of the busbar and an insulation-voltage sampled signal (HV_VDC) line, and an insulation-voltage sampled signal (HV_VISO) line is connected to the electric-motor controller; and the electric-motor controller is configured to compare a busbar-voltage value gathered by the first voltage sampling circuit and an insulation-voltage value gathered by the second voltage sampling circuit, and when the busbar-voltage value and the insulation-voltage value are different, emit an insulation monitoring alarming signal.

Insulation monitoring circuit for motor controller

The present disclosure discloses an IGBT driving circuit for an electric-motor controller and an electric-motor controller. The IGBT driving circuit includes: a function safety circuit provided on a driver board of the electric-motor controller, and a detection feedback circuit and a pulse-width-modulation (PWM) buffer circuit that are connected to the function safety circuit. The detection feedback circuit is configured to detect an IGBT module of the electric-motor controller, and when a specified malfunction of the IGBT module is detected, send a specified-malfunction signal to the function safety circuit. The function safety circuit is configured to judge according to a preset malfunction treating rule and the received specified-malfunction signal, and then output a corresponding controlling signal to the PWM buffer circuit. The PWM buffer circuit is configured to generate according to the corresponding controlling signal a PWM signal that drives the IGBT module, to control ON/OFF of the IGBT module to protect the IGBT module. The technical solutions of the present application have multiple functions of protection, which improves the stability and the safety of the IGBT, and has quick action and timely protection.

IGBT drive circuit for motor controller, and motor controller

The present disclosure provides an electric-power supplying device, wherein the device includes: an isolation driving unit, including a high-voltage-side winding and a low-voltage-side winding, configured to transform a high-voltage input from a high-voltage power supply into a low-voltage output; a high-voltage inputting unit, including a first switch part that is connected in series to the high-voltage-side winding of the isolation driving unit; an output controlling unit, including a first terminal that is connected to the low-voltage-side winding of the isolation driving unit, a second terminal for receiving an output enabling signal from external, and a third terminal for outputting a low-voltage power-supply electric power when the output enabling signal is high; a switch regulating unit, configured to output a switch regulating signal to the first switch part of the high-voltage inputting unit; a high-voltage starting-up unit, including a first end that is connected to the high-voltage power supply, and a second end that is connected to the switch regulating unit, configured to supply a starting-up voltage to the switch regulating unit; and an auxiliary-power-supply unit, including a first end that is coupled to the low-voltage-side winding of the isolation driving unit, and a second end that is connected to the switch regulating unit, configured to supply an electric power to the switch regulating unit.

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Beijing, China

Fuxiang Wan