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US 9,318,991 B2Granted
Electric motor frequency modulation system
AssigneeThe Boeing Company
InventorsChristopher Pete Benson, Douglas C. Cameron, Peng Zeng
Life of this patent
Estimating the term…
Abstract
A method and apparatus for controlling an electric motor. A switching frequency meeting a desired operating condition is identified from information relating to operation of the electric motor. A switching of a current supplied to the electric motor with the switching frequency identified is controlled.
Claims20
An apparatus comprising:
- a controller configured to identify a switching frequency meeting a desired operating condition from information relating to operation of an electric motor and control switching of a current supplied to the electric motor with the switching frequency identified;
- wherein the switching frequency is identified based on a motor load, a controller temperature, a controller temperature rate of change, a stator temperature, and a stator temperature rate of change.
An electric motor system comprising:
- an electric motor;
- and
- a controller configured to:
- receive information relating to heat generated by an operation of the electric motor;
- identify a switching frequency meeting a desired operating temperature from the information relating to the heat generated by the operation of the electric motor;
- and
- control switching of a current supplied to the electric motor with the switching frequency identified;
- wherein the switching frequency is identified based on a motor load, a controller temperature, a controller temperature rate of change, a stator temperature, and a stator temperature rate of change.
5 more elements
A method for controlling an electric motor comprising:
- identifying a switching frequency meeting a desired operating condition from information relating to operation of the electric motor;
- and
- controlling switching of a current supplied to the electric motor with the switching frequency identified;
- wherein the switching frequency is identified based on a motor load, a controller temperature, a controller temperature rate of change, a stator temperature, and a stator temperature rate of change.
1 more element
Dependencies are inferred from the claim text.