×

Electric throttle and motor control circuitry

  • US 5,414,792 A
  • Filed: 01/27/1994
  • Issued: 05/09/1995
  • Est. Priority Date: 01/27/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A motor control circuit that provides efficient control over a direct current electric motor by translating the mechanical position of a manipulable throttle into a current flow from a direct current power source, comprising:

  • a Hall Effect throttle position transducer;

    a throttle signal amplifier circuit for amplifying and conditioning athrottle signal from said Hall Effect transducer;

    a reverse condition sensor for modifying said throttle signal in response to a reverse condition in a vehicle propelled by said electric motor;

    a voltage regulator circuit;

    a pulse width modulation (PWM) circuit for generating a first square waveform wherein the duration of each square wave pulse is inversely related to a voltage level of said throttle signal;

    an inhibitor circuit for sensing an absence of an operational voltage and for canceling said first square waveform upon said absence or upon sensing an over-voltage condition;

    an invertor circuit for inverting said first square waveform and converting it to a second square waveform; and

    at least one MOSFET circuit acting as a current switch to regulate a flow of current through said electric motor, said MOSFET circuit controlled by said second square waveform.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×