×

OPTIMAL CONTROL SYSTEM FOR AN ELECTRIC MOTOR DRIVEN VEHICLE

  • US 3,630,304 A
  • Filed: 11/28/1969
  • Issued: 12/28/1971
  • Est. Priority Date: 11/28/1969
  • Status: Expired due to Term
First Claim
Patent Images

1. In a vehicle driven over terrain by an electrical motor which receives power from a battery under control of a throttle, the improvement comprising:

  • means for establishing a throttle voltage in response to the setting of the throttle representative of the desired vehicle speed, tachometer means driven by said electrical motor for generating a tachometer voltage representative of the actual speed of said vehicle, slope sensing means for establishing a terrain voltage representative of the terrain slope, means to which said throttle, tachometer and terrain voltages are applied for establishing a control voltage representative of the control effect required to attain the speed specified by said throttle setting, means for comparing said control voltage with said tachometer voltage for establishing a motor drive signal when said control voltage exceeds said tachometer voltage and for producing a regenerative sigNal when said tachometer voltage exceeds said control voltage, means enabled responsive to said motor drive signal for applying current from said battery to said electric motor in an amount determined by said control signal, and means enabled responsive to said regenerative signal for applying charging voltage from said electric motor to said battery in an amount determined by said control signal.

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