Method for monitoring health of an electric machine
AssigneeGE Aviation Systems LLC
InventorsGuanghua Wang, Jason Randall Gulley, Lili Zhang, James Patrick Mahle, Xiaochuan Jia
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Abstract
A method for monitoring the health of an electric power train or electric machine thereof are disclosed herein. The method includes imaging a rotor at a start of a spin down process to determine a first rotor temperature, and imaging the rotor at an end of or after the spin down process to determine a second rotor temperature to determining a rotor temperature reduction. A maximum rotor temperature can be determined as a summation of the temperature after the spin down process and the rotor temperature reduction, which can be used to indicate the health of the electric power train or the electric machine.
Claims20
A method of imaging an electric machine, the method comprising:
- rotating a rotor spaced from a stator to generate an electric current;
- slowing rotation of the rotor during a spin down process;
- imaging the rotor at a start of the spin down process to determine a first rotor temperature;
- imaging the rotor at an end of the spin down process to determine a second rotor temperature;
- determining a rotor temperature reduction as a difference between the first rotor temperature and the second rotor temperature;
- imaging the rotor after the end of the spin down process to determine a third rotor temperature;
- and
- determining a maximum rotor temperature as a summation of the third rotor temperature and the rotor temperature reduction.
Dependencies are inferred from the claim text.