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RAPID HILL HOLD AUTO-BALANCE APPARATUS AND METHOD FOR VEHICLES PROPELLED BY MAGNETIC SYNCHRONOUS MOTORS

  • US 20200136534A1
  • Filed: 09/26/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/29/2018
  • Status: Active Application
First Claim
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1. An improved method of rapidly preventing post stoppage wheel roll in electrically propelled vehicles, said method comprising the steps of:

  • receiving notification from position sensors that the rotor of the electric motor has began rotating in the opposite direction of the selected gear;

    recording the initial position of the rotor;

    applying an initial current of a pre-determined magnitude in the vector direction of the initial position of the rotor to the electric motor;

    determining the angle of rotation of the rotor rotation from when said initial current was applied to the motor until rotor ceases rotating or phase angle equals MTPA angle to determine modified current;

    engaging speed controller to produce torque equal to torque created by initial current of a pre-determined magnitude in the vector direction of the initial position of the rotor to the electric motor.

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