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APPARATUS FOR DISCHARGING A HIGH-VOLTAGE BUS

  • US 20170257039A1
  • Filed: 03/03/2016
  • Published: 09/07/2017
  • Est. Priority Date: 03/03/2016
  • Status: Active Grant
First Claim
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1. A power inverter electrically connected to a high-voltage DC power source via a high-voltage bus, the power inverter comprising:

  • a multi-phase inverter circuit electrically connected to positive and negative conductors of the high-voltage bus;

    a bi-stable switch electrically connected in series with a discharge resistor between the positive and negative conductors of the high-voltage bus;

    a capacitor electrically connected between the positive and negative conductors of the high-voltage bus;

    first and second trigger circuits in communication with a gate of the bi-stable switch;

    first and second contactors being controllable to electrically connect a respective one of the positive and negative conductors of the high-voltage bus to the high-voltage DC power source, wherein the first and second contactors are in communication with a respective one of the first and second trigger circuits;

    wherein the bi-stable switch is controllable to provide a low-impedance electric current flow path through the discharge resistor between the positive and negative conductors of the high-voltage bus in response to an activation signal that is communicated from one of the first and second contactors to the bi-stable switch via one of the first and second trigger circuits.

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