- Patent Title: Electrical machine and method for operating an electrical machine
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Application No.: US15859463Application Date: 2017-12-30
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Publication No.: US10574174B2Publication Date: 2020-02-25
- Inventor: Alessandro Castagnini , Darren Tremelling , Elio Alberto Perigo , Giulio Secondo , Liming Liu
- Applicant: ABB Schweiz AG
- Applicant Address: CH Baden
- Assignee: ABB Schweiz AG
- Current Assignee: ABB Schweiz AG
- Current Assignee Address: CH Baden
- Agency: Taft Stettinius & Hollister LLP
- Agent J. Bruce Schelkopf
- Main IPC: H02P31/00
- IPC: H02P31/00 ; H01F13/00 ; H02K15/03 ; H02K1/27 ; H02K1/20

Abstract:
A method for operating an electrical machine having a stator and having a rotor with permanent magnets, includes: running the electrical machine; determining, while performing the running of the electrical machine, whether the permanent magnets have been demagnetized; finding, while running the electrical machine, the q-axis responsive to a determination that the permanent magnets have been demagnetized; firing a current pulse through the stator, while running the electrical machine, when the q-axis reaches a desired position relative to a selected stator phase, wherein the current pulse is constructed to remagnetize the permanent magnets; and continuing to run the electrical machine.
Public/Granted literature
- US20190207550A1 ELECTRICAL MACHINE AND METHOD FOR OPERATING AN ELECTRICAL MACHINE Public/Granted day:2019-07-04
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