Application of ON/OFF method to new conceptual design of magnetic devices

Norio Takahashi (Electrical and Electronic Engineering Department, Okayama University, Okayama, Japan)



The purpose of the paper is to show that how a new magnetic circuit, which the paper could not imagined beforehand, may be obtained using a newly developed ON/OFF topology optimization method by applying it to the design of magnetic head and motor.


ON/OFF optimization technique combined with finite element method.


It is shown that 3-D topology optimization of SPT head, in which the recording head is increased and the leakage flux is decreased, is possible using the proposed method. The optimization of IPM motor with the minimum torque ripple and the maximum toque is also examined.


3-D ON/OFF optimization method applied to practical problems considering the nonlinearity and rotation of rotor, etc.



Takahashi, N. (2013), "Application of ON/OFF method to new conceptual design of magnetic devices", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 32 No. 6, pp. 1943-1954.

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