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Method and apparatus for a fuel cell propulsion system

  • US 6,321,145 B1
  • Filed: 01/29/2001
  • Issued: 11/20/2001
  • Est. Priority Date: 01/29/2001
  • Status: Expired due to Fees
First Claim
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1. A propulsion control system adapted for use in a fuel cell powered vehicle, said system comprising:

  • a propulsion motor;

    a fuel cell unit outputting dc electric voltage;

    a power battery outputting dc power battery voltage;

    a dc/dc boost converter receiving said dc electric voltage from said fuel cell unit, said dc/dc boost converter outputting boosted dc electric voltage;

    an inverter receiving said dc power battery voltage from said power battery and said boosted dc electric voltage from said dc/dc boost converter, said inverter outputting ac electric voltage to said propulsion motor;

    a vehicle controller receiving at least one electrical measurement input from said power battery, said vehicle controller outputting an electrical measurement reference; and

    a comparing device receiving said electrical measurement reference from said vehicle controller, said comparing device receiving an actual electrical measurement from said fuel cell, said comparing device outputting a signal to said dc/dc boost converter, whereby the power output of said fuel cell remains constant.

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