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Topological Shape Optimization of Permanent Magnet in Voice Coil Motor Using Level Set Method

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2 Author(s)
Jangwon Lee ; Sch. of Mechatron., Gwangju Inst. of Sci. & Technol., Gwangju, South Korea ; Semyung Wang

In this paper, a voice coil motor is optimized using the single-phase and the multi-phase level set method, and the magnetic saturation effect is considered in the optimization. The normal velocities on the moving boundaries are calculated by a design sensitivity analysis (DSA) using the adjoint variable method (AVM). In the first numerical example using a C-core actuator, the level set based optimization is compared with conventional topology optimization. In the second numerical example of the voice coil motor, optimizations using the single-phase and the multi-phase level set method are performed to maximize the Lorentz force on the moving coil by means of the optimal shapes of the permanent magnet and the ferromagnetic material in a design domain.

Published in:

Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 2 )