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From the constant-speed variable-output motor driving test result of an interior permanent-magnet synchronous motor for a pump drive, we observed that there was an additional loss factor, which was not previously considered. Furthermore, a 3-D finite-element method analysis was performed to investigate the cause of the additional electromagnetic loss. Accordingly, it was confirmed that there was an...
This study confirmed that unexpected additional eddy current loss may occur in rotor's retaining plate, which is commonly applied to the Permanent Magnet Synchronous Motor(PMSM) rotor structure. In the study, it performs a comparison between the analysis value and the test value of the variable output PMSM motor's efficiency characteristic according to output power. In the process, it is inferred...
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