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Acoustic Simulation of a Special Switched Reluctance Drive by Means of Field–Circuit Coupling and Multiphysics Simulation

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6 Author(s)
M. van der Giet ; Institute of Electrical Machines, RWTH Aachen University, Aachen, Germany ; E. Lange ; D. A. P. Correa ; I. E. Chabu
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The approach presented in this paper consists of an energy-based field-circuit coupling in combination with multiphysics simulation of the acoustic radiation of electrical machines. The proposed method is applied to a special switched reluctance motor with asymmetric pole geometry to improve the start-up torque. The pole shape has been optimized, subject to low torque ripple, in a previous study. The proposed approach here is used to analyze the impact of the optimization on the overall acoustic behavior. The field-circuit coupling is based on a temporary lumped-parameter model of the magnetic part incorporated into a circuit simulation based on the modified nodal analysis. The harmonic force excitation is calculated by means of stress tensor computation, and it is transformed to a mechanical mesh by mapping techniques. The structural dynamic problem is solved in the frequency domain using a finite-element modal analysis and superposition. The radiation characteristic is obtained from boundary element acoustic simulation. Simulation results of both rotor types are compared, and measurements of the drive are presented.

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IEEE Transactions on Industrial Electronics  (Volume:57 ,  Issue: 9 )