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A Novel Multi-material Topology Optimization Method for Multi-segmented Permanent Magnet motors
Yuki Hidaka
Nagaoka University of Technology, Japan
This paper presents a novel multi-material topology optimization method for multi-segmented permanent magnet motors. In the proposed method, optimization process is divided into two stages. In the first step, multi-material topology optimization, in which magnetization vector of each magnet element is defined stochastically, is performed to determine the rough magnet arrangement. In the second step, the geometry obtained in the first step is used as the initial solution, and detailed design is performed. To validate the effectiveness, the proposed method is applied to the shape optimization problem of a multi-segmented permanent magnet motor.
A Topology Optimization of on-chip Planer Inductor Based on Evolutional on/off Method and CMA-ES
Takahiro Sato, Kota Watanabe
Muroran Institute of Technology, Japan
This paper presents a topology optimization of on-chip planar inductors based on evolutional on/off method and CMA-ES. The conductor shape of the inductor is expressed through the spatially-smooth function and its variables are optimized by CMA-ES. It is shown that the resultant inductor shape is varied depending on the given specifications.
Study on Torque Ripple Reduction Effect of Asymmetric Flux Barrier in Concentrated Winding IPM Motor by Topology Optimization and Frozen Permeability Method
Shunsuke Yamamoto, Shoki Nakagoshi, Yuki Hidaka
Nagaoka University of Technology / Japan
In this paper, topology optimization and the frozen permeability method is used to verify the effect of asymmetric flux barriers on torque ripple reduction. Although an interior permanent magnet motor with an asymmetric flux barrier has been proposed in previous studies, the number of references is limited and the mechanism is unclear. In this paper, the geometry of symmetric and asymmetric flux barriers is optimized using topology optimization. Torque analysis is then performed for the obtained optimized geometry, and the frozen permeability method is used to separate the cogging torque and the load torque. The torque separation results reveal the torque ripple reduction effect due to offsetting of cogging and load torque, which has not been reported in previous studies.