Position Estimation in Switched Reluctance Motor Drives Using the First Switching Harmonics Through Fourier Series

Position estimation using only active phase voltage and current is presented to perform high-accuracy position sensorless control of a switched reluctance motor (SRM) drive. By extracting the amplitude of the first switching harmonic terms of phase voltage and current for a pulsewidth modulation period through the Fourier series, flux linkage and position are estimated without external hardware circuitry, such as a modulator and a demodulator, resulting in increasing cost, as well as large position estimation error produced when the motional back electromotive force is ignored near zero speed. Hence, the proposed position estimation scheme covers the entire speed range, including the standstill under various loads, and it has high-resolution information depending on switching frequency. A two-phase SRM drive system, consisting of an asymmetrical converter and a conventional closed-loop proportional-integral current controller, is utilized to validate the performance of the proposed position estimation scheme in comprehensive operating conditions. The estimated values very closely track the actual values in dynamic simulations and experiments. It is shown that the proposed position estimation scheme using the Fourier series is sufficiently accurate and works satisfactorily at various operating points.

[1]  R. Krishnan,et al.  Whither motor drives: A case study in switched reluctance motor drives , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[2]  Mario Pacas,et al.  Encoderless Predictive Direct Torque Control for Synchronous Reluctance Machines at Very Low and Zero Speed , 2008, IEEE Transactions on Industrial Electronics.

[3]  Wei Hua,et al.  Inductance characteristics of 3-phase flux-switching permanent magnet machine with doubly-salient structure , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[4]  Muhammed Fazlur Rahman,et al.  Sensorless Sliding-Mode MTPA Control of an IPM Synchronous Motor Drive Using a Sliding-Mode Observer and HF Signal Injection , 2010, IEEE Transactions on Industrial Electronics.

[5]  I. Husain,et al.  Low level amplitude modulation based sensorless operation of a switched reluctance motor , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[6]  S. K. Panda,et al.  Waveform detection technique for indirect rotor-position sensing of switched-reluctance motor drives. II. Experimental results , 1993 .

[7]  Mehrdad Ehsani,et al.  A novel approach to auto-calibrating sensorless switched reluctance motor drive , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[8]  Barry W. Williams,et al.  Online Modeling for Switched Reluctance Motors Using B-Spline Neural Networks , 2007, IEEE Transactions on Industrial Electronics.

[9]  Iqbal Husain,et al.  Rotor position sensing in switched reluctance motor drives by measuring mutually induced voltages , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[10]  B. Fahimi,et al.  Development of 4-quadrant sensorless control of SRM drives over the entire speed range , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[11]  R. Krishnan,et al.  Sensorless control of single switch based switched reluctance motor drive using neural network , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[12]  Adrian David Cheok,et al.  High robustness and reliability of fuzzy logic based position estimation for sensorless switched reluctance motor drives , 2000 .

[13]  Jafar Soltani,et al.  Adaptive Input–Output Feedback-Linearization-Based Torque Control of Synchronous Reluctance Motor Without Mechanical Sensor , 2010, IEEE Transactions on Industrial Electronics.

[14]  Debiprasad Panda,et al.  Reduced Acoustic Noise Variable DC-Bus-Voltage-Based Sensorless Switched Reluctance Motor Drive for HVAC Applications , 2007, IEEE Transactions on Industrial Electronics.

[15]  J.H. Lang,et al.  A simple motion estimator for variable-reluctance motors , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[16]  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.

[17]  R. Krishnan,et al.  Two Phase SRM With Flux Reversal Free Stator: Concept, Analysis, Design and Experimental Verification , 2006 .

[18]  Jin-Woo Ahn,et al.  A Simple Nonlinear Logical Torque Sharing Function for Low-Torque Ripple SR Drive , 2009, IEEE Transactions on Industrial Electronics.

[19]  Bernard Multon,et al.  Sensorless rotor position analysis using resonant method for switched reluctance motor , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[20]  Barry W. Williams,et al.  High-performance current control for switched reluctance motors based on on-line estimated parameters , 2010 .

[21]  I. Husain,et al.  Elimination of discrete position sensor and current sensor in switched reluctance motor drives , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[22]  Ned Mohan,et al.  Dynamic Modeling, Experimental Characterization, and Verification for SRM Operation With Simultaneous Two-Phase Excitation , 2006, IEEE Transactions on Industrial Electronics.

[23]  Roland J. Hill,et al.  Detection of Rotor Position in Stepping and Switched Motors by Monitoring of Current Waveforms , 1985, IEEE Transactions on Industrial Electronics.

[24]  P. Kjaer,et al.  A new sensorless method for switched reluctance motor drives , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[25]  R. Arumugam,et al.  Real-Time Verification of AI Based Rotor Position Estimation Techniques for a 6/4 Pole Switched Reluctance Motor Drive , 2007, IEEE Transactions on Magnetics.

[26]  Babak Fahimi,et al.  An Autocalibrating Inductance Model for Switched Reluctance Motor Drives , 2007, IEEE Transactions on Industrial Electronics.

[27]  M. Ehsani,et al.  New modulation encoding techniques for indirect rotor position sensing in switched reluctance motors , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[28]  N. Ertugrul,et al.  A model free fuzzy logic based rotor position sensorless switched reluctance motor drives , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[29]  I. Husain,et al.  Four quadrant and zero speed sensorless control of a switched reluctance motor , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[30]  Patrick Guillaume,et al.  Induction motor dynamic and static inductance identification using a broadband excitation technique , 1998 .

[31]  Jan A. Melkebeek,et al.  Rotor-Position Estimation of Switched Reluctance Motors Based on Damped Voltage Resonance , 2010, IEEE Transactions on Industrial Electronics.

[32]  Ibrahim H. Al-Bahadly,et al.  Examination of a Sensorless Rotor-Position-Measurement Method for Switched Reluctance Drive , 2008, IEEE Transactions on Industrial Electronics.

[33]  S. K. Panda,et al.  Waveform detection technique for indirect rotor-position sensing of switched-reluctance motor drives. I. Analysis , 1993 .

[34]  Roberto Cárdenas,et al.  Sensorless Control for a Switched Reluctance Wind Generator, Based on Current Slopes and Neural Networks , 2009, IEEE Transactions on Industrial Electronics.

[35]  Jeffrey H. Lang,et al.  State observers for variable-reluctance motors , 1990 .

[36]  Alberto Tenconi,et al.  Temperatures Evaluation in an Integrated Motor Drive for Traction Applications , 2006, IEEE Transactions on Industrial Electronics.