Invention Application
- Patent Title: SYSTEM AND METHOD FOR SELF-SENSING OF ELECTRIC MACHINES AND REDUCTION OF NOISE AND VIBRATION ASSOCIATED THEREWITH
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Application No.: US16698622Application Date: 2019-11-27
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Publication No.: US20200169212A1Publication Date: 2020-05-28
- Inventor: Kum-Kang Huh , Yukai Wang , Nidhishri Tapadia , Di Pan
- Applicant: General Electric Company
- Main IPC: H02P27/08
- IPC: H02P27/08 ; H02P21/22 ; H02P21/18

Abstract:
A drive system for driving an AC electric machine includes an electric machine power converter that provides a primary current excitation vector having a magnitude and angle to drive the AC electric machine. A control system separate from or incorporated into the power converter causes the power converter to inject a carrier signal to the AC electric machine that is superimposed onto the current vector and that generates a carrier response signal that has sensitivity to magnetic alignment information of the AC electric machine at its operating point, the carrier response signal providing a measurable magnetic alignment signature of the AC electric machine. The control system causes the power converter to inject the carrier signal at an injection angle between a constant flux injection angle and a constant torque injection angle, to reduce noise and/or vibration of the AC electric machine caused by the injected carrier signal.
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