Motor control current sensor loss of assist mitigation for electric power steering

  • US 9,809,247 B2
  • Filed: 01/26/2016
  • Issued: 11/07/2017
  • Est. Priority Date: 01/30/2015
  • Status: Active Grant
First Claim
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1. A power steering system comprising:

  • a torque modifier module that generates a modified torque command in response to a current sensor fault, a magnitude of the modified torque command changes over a time period; and

    a feedforward selection module that applies a dynamic feedforward compensation to a motor current command, the dynamic feedforward compensation based on motor inductance and motor-circuit resistance, thereby generating a motor voltage that is applied to a motor of the power steering system, the dynamic feedforward compensation modifies a frequency response of the power steering system, the motor current command is based on the modified torque command.

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