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Method and apparatus for determining faults in an electric assist steering system

  • US 20060122796A1
  • Filed: 12/08/2004
  • Published: 06/08/2006
  • Est. Priority Date: 12/08/2004
  • Status: Active Grant
First Claim
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1. A method for determining a fault in a system including an electric motor, said method comprising the steps of:

  • determining a calculated star voltage of the electric motor;

    determining a measured star voltage of the electric motor;

    comparing said calculated star voltage to said measured star voltage of the electric motor to determine a star voltage error; and

    determining the fault in the system when said star voltage error exceeds a predetermined maximum star voltage error.

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