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This paper presents the optimum design of the brushless DC motor to minimize the material cost considering the fluctuation of the raw materials cost. The fluctuated cost data of the raw materials, which are assumed to be gathered some period, are reflected to the stochastic optimum design process. The constraint of the BEMF characteristics is also considered by the tolerance of the design variables...
The incomplete magnetization is a frequently occurring phenomenon during the magnetizing process of magnets in precision motors because they use ring magnets which are not segmented. Even a small variance of the incomplete magnetization can make critical changes in the characteristics of motors like cogging torque profiles and the cogging torque profiles play an important part in reducing the noise...
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