Method and apparatus for monitoring and controlling a synchronous electric machine
AssigneeGM Global Technology Operations LLC
InventorsMilun Perisic, Silva Hiti, Constantin C. Stancu, Peter J. Savagian
Life of this patent
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Abstract
Controlling a synchronous electric machine includes determining a rotor field current of a wound rotor of the synchronous electric machine and determining a time-rate change in field flux linkage. A rotor field voltage is determined based upon the time-rate change in the field flux linkage, and a rotor field resistance is determined based upon the rotor field voltage and the rotor field current. A rotor temperature is determined based upon the rotor field resistance. Operation of the synchronous electric machine is controlled responsive to a torque command and the rotor temperature.
Claims13
Method for controlling a synchronous electric machine, comprising:
- determining rotor field current of a wound rotor of the synchronous electric machine;
- determining a time-rate change in a field flux linkage;
- determining a rotor field voltage based upon the time-rate change in the field flux linkage;
- determining a rotor field resistance based upon the rotor field voltage and the rotor field current;
- determining a rotor temperature based upon the rotor field resistance;
- and
- controlling operation of the synchronous electric machine responsive to a torque command and the rotor temperature.
Method for controlling a synchronous electric machine, comprising:
- determining rotor field current of a wound rotor of the synchronous electric machine;
- determining a time-rate change in a field flux linkage;
- determining a rotor field voltage based upon the time-rate change in the field flux linkage;
- determining a rotor temperature based upon the rotor field voltage and the rotor field current;
- and
- controlling operation of the synchronous electric machine responsive to the rotor temperature.
Method for controlling a wound rotor synchronous electric machine, comprising:
- monitoring a rotor field current of the wound rotor;
- estimating a time-rate change in a field flux linkage;
- determining a rotor field voltage based upon the time-rate change in the field flux linkage;
- determining a rotor field resistance based upon the rotor field voltage and the rotor field current;
- determining a rotor temperature based upon the rotor field resistance;
- and
- controlling operation of the wound rotor synchronous electric machine responsive to the rotor temperature and a torque command.
Dependencies are inferred from the claim text.