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PRECHARGING A HIGH-VOLTAGE BUS USING A VOLTAGE-REGULATED POWER SUPPLY

  • US 20100001582A1
  • Filed: 07/01/2008
  • Published: 01/07/2010
  • Est. Priority Date: 07/01/2008
  • Status: Active Grant
First Claim
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1. A precharge system for use in a vehicle, the precharge system comprising:

  • a first energy source having a first terminal and a second terminal, wherein the first energy source has a first voltage equal to a potential difference between the first terminal and the second terminal;

    a bus having a first rail and a second rail, wherein the bus has a second voltage equal to a potential difference between the first rail and the second rail;

    a first contactor coupled between the first terminal and the first rail;

    a second contactor coupled between the second terminal and the second rail; and

    a controller coupled to the first energy source, the bus, the first contactor, and the second contactor, the controller being configured to;

    activate the second contactor; and

    thereafter activate the first contactor if the magnitude of a difference between the first voltage and the second voltage is less than a threshold tolerance.

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