Sensorless Commutation Control of Switched Reluctance Motor

This paper addresses control of commutation of switched reluctance (SR) motor without the use of a physical position detector. Rotor position detection schemes for SR motor based on magnetisation characteristics of the motor use normal excitation or applied current /voltage pulses. The resulting schemes are referred to as passive or active methods respectively. The research effort is in realizing an economical sensorless SR rotor position detector that is accurate, reliable and robust to suit a particular application. An effective and reliable means of generating commutation signals of an SR motor based on inductance profile of its stator windings determined using active probing technique is presented. The scheme has been validated online using a 4-phase 8/6 SR motor and an 8-bit processor.

Authors:



References:
[1] Mvungi NH, Lahoud MA and Stephenson JM, ''A New Sensorless Position Detection Detector for SR Drives'', Proceedings of the 4th International Conference on Electrical Machines and Drives, 1989, pp. 249-252. [2] Mvungi NH, and Stephenson JM, ''Accurate Sensorless Rotor Position Detection in an SR Motor'', Proceedings European Power Electronics Conference, 1992, vol. 1, pp390-393. [3] Suresh G, Fahami B, and Ehsani M, ''Improvement of the Accuracy and Speed Range in Sensorless Control of Switched Reluctance Motors'', Proceedings of the 33rd Industrial Applications Conference, The 1998 IEEE, vol. 1, pp771-777. [4] Ray WF, and Al-Bahadly IH, ''Sensorless Method for Determining the Rotor Position of Switched Reluctance Motor Drive'', Proceedings of the 29th Industrial Applications Conference, The 1994 IEEE, pp13-17. [5] Panda D, and Ramanarayanan V, ''Sensorless Control of Switched Reluctance Motor Drive with Self Measured Flux-Linkage Characteristics'', Proceedings of the 31st Power Electronics Specialist Conference, 2000 IEEE vol 3, pp1569-1574. [6] Bellini A, Filippetti F, Franceschini G, Tassoni C and Vas P, ''Position Sensorless Control of a SRM Drive Using ANN-Techniques'', Proceedings of the 33rd Industrial Applications Conference, The 1998 IEEE, vol. 1, pp709-714. [7] Nagel NJ, and Lorenz RD, ''Rotating Vector Methods for Sensorless, Smooth Torque Control of a Switched Reluctance Motor Drive'', Proceedings of the 33rd Industrial Applications Conference, The 1998 IEEE, vol. 1, pp723-730 [8] Young IW, Shin JW, and Kim YS, ''The Rotor Speed and Position Sensorless Control of Switched Reluctance Motor Using the Adaptive Observer'', Proceedings of the 34th Industrial Applications Conference, The 1999 IEEE, vol. 1, pp533-538. [9] Yang IW and Kim YS, ''Rotor Speed and Position sensorless control of a Switched Reluctance Motor Using the Binary Observer'', IEE Proceedings Electrical Power Application, Vol. 147 part 3, May 2000, pp220-226. [10] Lumsdaine A and Lang JH, ''State Observer for Variable Reluctance Motors'', IEEE Transactions, 1990, vol IE-37 part 2, pp133-142. [11] Thompson KR, Acarnely PP and French C, ''Rotor Position Detection in a Switched Reluctance Drive Using Recursive Least Squares'', IEEE Transactions on Industrial Electronics, vol. 47 part 2 April 2000, pp368-379.