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GENICHI TAGUCHI developed statistical methods for quality improvement of engineering products,
marketing, etc. This method is called Taguchi method that more recently applied to engineering and
applied science. The Taguchi experiment design method for optimal design to mitigate cogging torque of a
surface permanent magnet (SPM) motor is used in this article. In this paper, an efficient algorithm to the
solutions for shape of PM is proposed and applied to optimize the shape of PMs in a surface-mounted PM
motor to reduce the cogging torque. Finally, Simulation results are presented that indicates the reduction
of magnitude of cogging torque.