초록 ▼

Propulsion control system and method are provided for use in vehicles including a propulsion motor that is powered by a fuel cell. The fuel cell unit produces a compatible voltage for the propulsion motor, thereby removing the need for a dc/dc boost converter. A buck/boost converter and a standard 1

Propulsion control system and method are provided for use in vehicles including a propulsion motor that is powered by a fuel cell. The fuel cell unit produces a compatible voltage for the propulsion motor, thereby removing the need for a dc/dc boost converter. A buck/boost converter and a standard 12 volt battery are used to start the fuel cell. An inverter receives dc electric voltage from the fuel cell and outputs ac electric voltage to the propulsion motor. A vehicle controller receives a voltage input from the fuel cell unit and outputs a current reference to a comparing device. The comparing device compares the current reference from the vehicle controller to an actual current of the fuel cell unit and then outputs a signal to a PI control which outputs a control signal to a fuel cell controller, whereby the power output of the fuel cell is controlled based on the actual current of the fuel cell.

대표청구항 ▼

[ I claim as my invention:] [1.]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 elect

[ I claim as my invention:] [1.]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; anda 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.