In this study, a motor was developed with a target output of 55kW and IE5-level efficiency. To reduce harmonic losses that increase at high speeds, a low-loss structure using amorphous metal was investigated. The rotor adopts an IPM structure, and the core shape was designed as durable via stress analysis. A prototype was developed with the aforementioned structure, and the fundamental performance of the motor was evaluated to verify the validity of the design. An efficiency of 95% was confirmed at 20kr/min and 55kW, and thereby, the target efficiency was achieved.
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