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The main target of this paper is optimizing the slot-opening shift for cogging torque reduction in BLDC motors. In a slot-opening shift method there is no skew, therefore the known drawbacks of the skewing is prevented. In the first part of the paper the slot-opening shift method for a BLDC motor is discussed. In this case, it is desired to find a method for cogging torque reduction without deteriorating...
The aim of this paper is to present optimal design process and optimized model of transverse flux rotary motor. Especially the stator and rotor tooth shapes are optimized to reduce cogging torque. Design of experiment and response surface methodology are used as an optimization method and all the experimental samples are obtained from 3-dimensional finite element analysis. After having a series of...
In this paper, the method with different pole arc combination was adopted to reduce the cogging torque in PMDC motors. To minimize the cogging torque, a global optimization algorithm (zooming algorithm) and the finite element method (FEM) are combined to find the best pole arc combination. The Fourier coefficient of the square of magnetic flux density is analyzed to determine the feasible region from...
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