Performance comparison between unipolar and bipolar excitations in switched reluctance machine with sinusoidal and rectangular waveforms

In this paper, the electromagnetic performance of switched reluctance machines (SRMs) with unipolar and bipolar excitations, either sinusoidal or rectangular current waveforms, is investigated in terms of torque capability and torque ripple, iron loss etc. By employing a cost effective standard 3-phase full bridge inverter, both rectangular and sinusoidal bipolar excitations are implemented. Compared with unipolar and rectangular bipolar excitations, the torque ripple and iron loss are significantly reduced with sinusoidal bipolar excitation, albeit with reduced torque capability. Experiments on a prototype 6/4 SRM are carried out to demonstrate the advantages of sinusoidal bipolar excitation.

[1]  X.D. Xue,et al.  Optimization and Evaluation of Torque-Sharing Functions for Torque Ripple Minimization in Switched Reluctance Motor Drives , 2009, IEEE Transactions on Power Electronics.

[2]  T.J.E. Miller,et al.  Nonlinear theory of the switched reluctance motor for rapid computer-aided design , 1990 .

[3]  C.Y. Wu,et al.  Analysis and reduction of vibration and acoustic noise in the switched reluctance drive , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[4]  D. Panda,et al.  Mutual Coupling and Its Effect on Steady-State Performance and Position Estimation of Even and Odd Number Phase Switched Reluctance Motor Drive , 2007, IEEE Transactions on Magnetics.

[5]  Robert D. Lorenz,et al.  Modeling of a saturated switched reluctance motor using an operating point analysis and the unsaturated torque equation , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[6]  Z.Q. Zhu,et al.  Analysis of average torque in switched reluctance motor with unipolar and bipolar excitations based on an improved Fourier series model , 2010, 2010 IEEE Vehicle Power and Propulsion Conference.

[7]  Babak Fahimi,et al.  Bipolar Switched Reluctance Machines: A Novel Solution for Automotive Applications , 2005, IEEE Transactions on Vehicular Technology.

[8]  Ali Emadi,et al.  Novel Switched Reluctance Machine Configuration With Higher Number of Rotor Poles Than Stator Poles: Concept to Implementation , 2010, IEEE Transactions on Industrial Electronics.

[9]  S. K. Sahoo,et al.  Iterative learning-based high-performance current controller for switched reluctance motors , 2004, IEEE Transactions on Energy Conversion.

[10]  Jin-Woo Ahn,et al.  A three-phase switched reluctance motor with two-phase excitation , 1999 .

[11]  T.J.E. Miller,et al.  Torque prediction using the flux-MMF diagram in AC, DC, and reluctance motors , 1996 .

[12]  N. C. Sahoo,et al.  Determination of current waveforms for torque ripple minimisation in switched reluctance motors using iterative learning: an investigation , 1999 .

[13]  R. Deodhar,et al.  Dc-link capacitance requirement and noise and vibration reduction in 6/4 switched reluctance machine with sinusoidal bipolar excitation , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[14]  Zi-Qiang Zhu,et al.  Electrical Machines and Drives for Electric, Hybrid, and Fuel Cell Vehicles , 2007, Proceedings of the IEEE.

[15]  Chi-Yao Wu,et al.  Acoustic noise cancellation techniques for switched reluctance drives , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[16]  Kemal Leblebicioglu,et al.  Optimum geometry for torque ripple minimization of switched reluctance motors , 2000 .

[17]  Iqbal Husain,et al.  Torque ripple minimization in switched reluctance motor drives by PWM current control , 1996 .

[18]  Zaiping Pan,et al.  Analytical Model for Predicting Maximum Reduction Levels of Vibration and Noise in Switched Reluctance Machine by Active Vibration Cancellation , 2011, IEEE Transactions on Energy Conversion.

[19]  B. Fahimi,et al.  Investigation of electromagnetic force components in SRM under single and multiphase excitation , 2005, IEEE Transactions on Industry Applications.

[20]  Mehdi Moallem,et al.  Predicting the torque of a switched reluctance machine from its finite element field solution , 1990 .