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

• Published in: IEEE transactions on industrial electronics (1982) Vol. 57; no. 9; pp. 2946 - 2953
• Main Authors: van der Giet, M, Lange, E, Corrêa, D A P, Chabu, I E, Nabeta, S I, Hameyer, K
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.09.2010; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Acoustic noise of electrical machines; Acoustics; Circuit simulation; Computational modeling; Computer simulation; Coupling circuits; field-circuit coupling numerical simulation; Finite element method; finite-element method (FEM); Geometry; Joining; Magnetic analysis; Magnetic domains; Mathematical analysis; Mathematical models; Motors; Poles; Reluctance; Reluctance motors; Shape; Stress; Studies; switched reluctance motor (SRM); Torque
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2010.2051935

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.