Electricity: motive power systems – Battery-fed motor systems
Patent
1991-03-27
1992-01-28
Ro, Bentsu
Electricity: motive power systems
Battery-fed motor systems
318599, 318257, H02P 729
Patent
active
050846582
ABSTRACT:
A motor speed control system for a vehicle is provided. The control system includes an electric motor connected to a power coupling element for delivering electrical energy to the motor in response to a control signal. A sensor produces a current signal in response to the magnitude of the current flowing through the motor. An accelerator pedal produces a command signal in response to a desired vehicle speed. A microprocessor receives the command signal and responsively delivers a pulse width modulated control signal to the power coupling element. The control signal has a duty cycle in a range between a minimum and predefined value. Additionally, the microprocessor receives the current signal and increases the duty cycle of the control signal by a predetermined amount beyond the predefined value in response to the received current signal.
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Nielsen Bruce A.
Pickering William
Caterpillar Industrial Inc.
Masterson David M.
Ro Bentsu
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