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US 2017/0363408 A1Published application
System and method for determining rotor position offset of an electric machine
AssigneeFord Global Technologies, LLC
InventorsMichael W. DEGNER, Shailesh Shrikant KOZAREKAR, Daniel Richard LUEDTKE
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Abstract
A method according to an exemplary aspect of the present disclosure includes, among other things, detecting a position, including a polarity, of a rotor to detect incorrect rotor position offset of an electric machine without generating torque or motion within the electric machine.
Claims20
A method, comprising:
- detecting a position and a polarity of a rotor of an electric machine without generating torque or motion within the electric machine, wherein the step of detecting includes:
- sensing an angular position of the rotor with a sensor;
- determining an alignment and a polarity of a direct axis of the rotor;
- and
- comparing the position and the polarity of the direct axis to the angular position to determine an incorrect rotor position offset.
2 more elements
A rotor position offset detection system, comprising:
- an electric machine having a rotor;
- a sensor that monitors a position of said rotor;
- a control unit in communication with said sensor;
- and
- an inverter in communication with said control unit, said control unit configured to compare information from said sensor with feedback from said inverter to detect an incorrect rotor position offset of said rotor.
2 more elements
A method, comprising:
- detecting an incorrect rotor position offset of a rotor of an electric machine without generating torque or motion within the electric machine, wherein detecting the incorrect rotor position offset includes employing a voltage command tracking method.
Dependencies are inferred from the claim text.