A polar coordinate-oriented method of identifying rotor flux and speed of induction motors without rotational transducers

In this paper, we propose a novel method of identifying rotor flux and speed of induction motors without rotational transducers. Our identification method does not involve any pure integration, which has been a main source of performance deterioration in most prior works. This is made possible by formulating the identification problem in the polar coordinate frame. It does not contain any parameters which need be re-tuned according to hardware configurations or operating conditions. Moreover, the motor speed does not have to vary slowly for the convergence of our flux and speed estimator. Various experimental results as well as a rigorous convergence analysis are presented to demonstrate the practical use and generality of our identification method. For our experimental work, we have built a prototype drive system, in which all algorithms for control and identification are implemented digitally on a digital signal processor.

[1]  Robert Joetten,et al.  Control Methods for Good Dynamic Performance Induction Motor Drives Based on Current and Voltage as Measured Quantities , 1983, IEEE Transactions on Industry Applications.

[2]  In-Joong Ha,et al.  Control of induction motors for both high dynamic performance and high power efficiency , 1992, IEEE Trans. Ind. Electron..

[3]  Tadashi Fukao,et al.  Robust speed identification for speed sensorless vector control of induction motors , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[4]  H. Kubota,et al.  DSP-based speed adaptive flux observer of induction motor , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[5]  Shinji Doki,et al.  Implementation of speed-sensor-less field-oriented vector control using adaptive sliding observers , 1992, Proceedings of the 1992 International Conference on Industrial Electronics, Control, Instrumentation, and Automation.

[6]  P. C. Sen,et al.  Decoupling control of induction motor drives , 1988 .

[7]  Seung-Ki Sul,et al.  Speed sensorless vector control of an induction motor using an extended Kalman filter , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[8]  H. van der Broeck,et al.  Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors , 1986, 1986 Annual Meeting Industry Applications Society.

[9]  T. Ohtani,et al.  Vector control of induction motor without shaft encoder , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[10]  C. Schauder,et al.  Adaptive speed identification for vector control of induction motors without rotational transducers , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[11]  H. Tajima,et al.  Speed sensorless field orientation control of the induction machine , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[12]  R.G. Harley,et al.  Evaluation of various slip estimation techniques for an induction machine operating under field oriented control conditions , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[13]  Alexander Kusko,et al.  Control Means for Minimization of Losses in AC and DC Motor Drives , 1983, IEEE Transactions on Industry Applications.

[14]  C. A. Desoer,et al.  Nonlinear Systems Analysis , 1978 .

[15]  I. Takahashi,et al.  Sensorless speed control of an induction motor with no influence of resistance variation , 1997, Proceedings of Power Conversion Conference - PCC '97.

[16]  R. Marino,et al.  Adaptive input-output linearizing control of induction motors , 1993, IEEE Trans. Autom. Control..

[17]  Seung-Ki Sul,et al.  Speed sensorless vector control of induction motor using extended Kalman filter , 1994 .

[18]  K. Matsuse,et al.  Speed sensorless field oriented control of induction machines using flux observer , 1994, Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics.

[19]  Takeshi Furuhashi,et al.  Adaptive Sliding Observers for Induction Motor Control , 1991 .

[20]  Shinji Doki,et al.  Adaptive sliding observers for direct field-oriented control of induction motor , 1990, [Proceedings] IECON '90: 16th Annual Conference of IEEE Industrial Electronics Society.

[21]  X. Xu,et al.  Implementation of direct stator flux orientation control on a versatile DSP based system , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[22]  George C. Verghese,et al.  Observers for flux estimation in induction machines , 1988 .

[23]  In-Joong Ha,et al.  Control of induction motors via feedback linearization with input-output decoupling , 1990 .

[24]  Z. Krzeminski,et al.  Nonlinear Control of Induction Motor , 1987 .

[25]  Yoshihiro Murai,et al.  Waveform Distortion and Correction Circuit for PWM Inverters with Switching Lag-Times , 1987, IEEE Transactions on Industry Applications.

[26]  N.R. Klaes.  Parameters identification of an induction machine with regard to dependencies on saturation , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.