Document Type : Research Article
Authors
1
Department of Electrical Engineering, Shahrood University of Technology, Shahrood, Iran
2
Faculty of Electrical and Robotic Engineering, Shahrood University of Technology
Abstract
In this paper, a novel method to design and optimization of a 1.5 kW, 4-pole, 36-slot salient-pole permanent magnet synchronous machine (SPPMSM) based on a three-step skewed pole shoe method to reduce the output torque ripple and the cogging torque is investigated. In the first step, an initial model of the SPPMSM is designed, simulated, and verified through the Finite-Element method (FEM). The simulation results ensure the electromagnetic performance of the initial model of the 1.5 kW, 4-pole, 36-slot SPPMSM at any operating conditions. Next, a novel method to re-design and optimize the 1.5 kW, 4-pole, 36-slot SPPMSM based on a three-step skewed pole shoe shape is presented.. The significant results obtained from the optimized model of the 1.5 kW, 4-pole, 36-slot SPPMSM is as: The output average torque and the air gap flux density are increased approximately by 12.65% and 3.33%, respectively compared to the initial design of the 1.5 kW, 4-pole, 36-slot SPPMSM. The torque ripple is an important parameter in the design of the 1.5 kW, 4-pole, 36-slot SPPMSM, and so, is decreased by about 16.03% and it is equal to 10.41% in comparison with the initial model which is equal to 12.41%. The cogging torque in the initial model of the 1.5 kW, 4-pole, 36-slot SPPMSM is equal to 0.036 N.m and with a 19.44% reduction, in the optimized model, it is 0.029 N.m. And finally, the Back-EMF voltage of the 1.5 kW 4-pole, 36-slot SPPMSM is improved by 1.27% compared to the initial design model.
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