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Battery-powered electric vehicle d.c. motor control

  • US 4,410,842 A
  • Filed: 09/22/1981
  • Issued: 10/18/1983
  • Est. Priority Date: 10/02/1980
  • Status: Expired due to Fees
First Claim
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1. A battery-powered electric vehicle d.c. motor control comprising a first potentiometer actuable by an accelerator pedal, a second potentiometer actuable by a brake pedal, motor current control means connected to control the current flow in the motor in accordance with a demand signal determined by the signals at the sliders of said potentiometers, contactor means for varying the connection configuration of the motor to provide motoring mode operation or regenerative braking mode operation, contactor control means sensitive to the signal at the slider of the first potentiometer only so as to switch the contactors to provide braking mode operation except when the accelerator pedal is depressed out of its rest position, means for generating a non-zero minimum demand signal when both pedals are in their rest positions and means for overridingly causing the contactor control means to switch the contactors to said motoring mode operation, and for cancelling said minimum demand signal in certain vehicle operating conditions.

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