3303 Reduction of Cogging Torque on the DC Blushless Motor for EPS

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  • 3303 EPS用DCブラシレスモータのコギングトルク低減(OS0 交通・物流一般,一般講演)

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This project studied the low cogging torque DC blushless motor for EPS system that would not cause steering feel to decline even when the vehicle was operated with a low steering angle at high vehicle speeds. The magnitude of cogging torque was predicted using FEM analysis. However, there was the large difference between FEM analysis and actuality. We analyzed this difference theoretically with a formula of cogging frequency and inspected the mechanism with the actual motor. As a result, if the connections were uniform at all of the junctions between the stator cores, the cogging torque target could be achieved.

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