A Novel Radiating Rib Structure in Switched Reluctance Motors for Low Acoustic Noise

Vibration and acoustic noise limit the application of switched reluctance motors (SRMs). Because the radial vibration of the stator is the primary source of the acoustic noise of SRMs, the modal analysis of the stator vibration is an important and effective way to reduce the acoustic noise. In this paper, we construct eight computational models by varying the structural forms, height, quantity, and shape of radiating ribs to investigate the influence of radiating ribs on the mechanical resonant frequencies, under the condition of the same amount of radiating rib material. We apply three-dimensional finite-element modal analysis to accurately analyze these models. Finally, we derive an optimal structure of the radiating rib to lower the acoustic noise level of SRMs and dissipate heat.

[1]  Pragasen Pillay,et al.  Analysis of mounting effects on vibrations of switched reluctance motors , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..

[2]  Wu Jian-hua.  STUDY ON THE STATOR MODE SHAPES AND NATURAL FREQUENCIES OF SWITCHED RELUCTANCE MOTOR BASED ON REAL STRUCTUAL MODEL , 2004 .

[3]  K.R. Rajagopal,et al.  Calculation of the flux-linkage characteristics of a switched reluctance motor by flux tube method , 2005, IEEE Transactions on Magnetics.

[4]  P. Pillay,et al.  An investigation into vibration in switched reluctance motors , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[5]  Pragasen Pillay,et al.  Impact of stator windings and end-bells on resonant frequencies and mode shapes of switched reluctance motors , 2002 .

[6]  X.D. Xue,et al.  Trigonometry-Based Numerical Method to Compute Nonlinear Magnetic Characteristics in Switched Reluctance Motors , 2006, IEEE Transactions on Magnetics.

[7]  Jawad Faiz,et al.  Finite-element analysis of a switched reluctance motor under static eccentricity fault , 2006, IEEE Transactions on Magnetics.

[8]  M.J. Kamper,et al.  Finite-Element Time-Step Simulation of the Switched Reluctance Machine Drive Under Single Pulse Mode Operation , 2007, IEEE Transactions on Magnetics.

[9]  Jeffrey H. Lang,et al.  The origin and reduction of acoustic noise in doubly salient variable-reluctance motors , 1992 .

[10]  W. Cai,et al.  Analytical formulae for calculating SRM modal frequencies for reduced vibration and acoustic noise design , 2001, IEMDC 2001. IEEE International Electric Machines and Drives Conference (Cat. No.01EX485).

[11]  R. Krishnan,et al.  Steady-state analysis of the variable-speed switched-reluctance motor drive , 1989 .

[12]  Iqbal Husain,et al.  Radial force calculation and acoustic noise prediction in switched reluctance machines , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[13]  P. Pillay,et al.  Young's modulus for laminated machine structures with particular reference to switched reluctance motor vibrations , 2004, IEEE Transactions on Industry Applications.

[14]  Pragasen Pillay,et al.  Low vibration design of SRMs for automotive applications using modal analysis , 2001, IEMDC 2001. IEEE International Electric Machines and Drives Conference (Cat. No.01EX485).

[15]  Pragasen Pillay,et al.  Resonance frequencies and mode shapes of switched reluctance motors , 1999, IEEE International Electric Machines and Drives Conference. IEMDC'99. Proceedings (Cat. No.99EX272).

[16]  C. Grabner,et al.  Analytical and numerical approaches for the prediction of resonance frequencies of a switched reluctance machine , 2004 .