Elimination of the stator resistance sensitivity and voltage sensor requirement problems for DFO control of an induction Machine

This paper focuses on a method for achieving robust direct field orientation control of an induction machine using a closed-loop voltage model flux observer that is insensitive to stator resistance variation and does not require voltage signal information, thereby eliminating the need for a voltage sensor. In contrast, the conventional voltage model observer topology requires voltage sensors and is highly sensitive to stator resistance variation, especially at low speed. The closed-loop sliding-mode voltage model flux observer presented here is based on current estimation error including a sliding-mode function which is a derivative of the stator flux. The newly designed sliding-mode function will not only drive the estimated current to the measured one, it will also directly give the estimation results for the terms (stator flux) replaced by the sliding-mode function. The constructed observer and chosen sliding-mode function also do not require information about parameters contained in the terms replaced by the sliding-mode function, i.e., voltage signal and stator resistance. The observer stability is verified in the paper. Simulation and experimental results are also used to illustrate features of the proposed observer.

[1]  Miran Rodic,et al.  Speed-sensorless sliding-mode torque control of an induction motor , 2002, IEEE Trans. Ind. Electron..

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

[3]  Abdelkrim Benchaib,et al.  Real-time sliding-mode observer and control of an induction motor , 1999, IEEE Trans. Ind. Electron..

[4]  Donald W. Novotny,et al.  The Influence of Motor Parameter Deviations in Feedforward Field Orientation Drive Systems , 1985, IEEE Transactions on Industry Applications.

[5]  A. Benchaib,et al.  Sliding mode input-output linearization and field orientation for real-time control of induction motors , 1999 .

[6]  Marco Tursini,et al.  Adaptive sliding mode observer for speed sensorless control of induction motors , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[7]  Athanasios N. Safacas,et al.  A new stator resistance tuning method for stator-flux-oriented vector-controlled induction motor drive , 2001, IEEE Trans. Ind. Electron..

[8]  Hu. Rehman.  Design of voltage model flux observer , 2004 .

[9]  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.

[10]  A. Vandenput,et al.  Sensorless direct field orientation at zero flux frequency , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[11]  Robert D. Lorenz,et al.  Transducerless position and velocity estimation in induction and salient AC machines , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[12]  R. Krishnan,et al.  Study of Parameter Sensitivity in High-Performance Inverter-Fed Induction Motor Drive Systems , 1987, IEEE Transactions on Industry Applications.

[13]  Rupprecht Gabriel,et al.  Field-Oriented Control of a Standard AC Motor Using Microprocessors , 1980, IEEE Transactions on Industry Applications.

[14]  Longya Xu,et al.  Fuzzy logic enhanced speed control of an indirect field oriented induction machine drive , 1995 .

[15]  R.M. Cuzner,et al.  Application of nonlinear observers for rotor position detection on an induction motor using machine voltages and currents , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[16]  X. Xu,et al.  A stator flux oriented induction machine drive , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[17]  Jin Young Choi,et al.  Flux observer with online tuning of stator and rotor resistances for induction motors , 2002, IEEE Trans. Ind. Electron..

[18]  R.D. Lorenz,et al.  Observer-based direct field orientation: analysis and comparison of alternative methods , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[19]  Vadim I. Utkin,et al.  Sliding mode control design principles and applications to electric drives , 1993, IEEE Trans. Ind. Electron..

[20]  R. Lorenz,et al.  A physically insightful approach to the design and accuracy assessment of flux observers for field oriented induction machine drives , 1992 .

[21]  H. Rehman,et al.  A flexible high performance advanced controller for electric machines , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[22]  Mark Sumner,et al.  Encoderless position estimation for symmetric cage induction machines under loaded conditions , 2001 .

[23]  Zhang Yan,et al.  Sensorless sliding-mode control of induction motors , 2000, IEEE Trans. Ind. Electron..

[24]  Longya Xu,et al.  On-line fuzzy tuning of indirect field-oriented induction machine drives , 1998 .

[25]  Robert D. Lorenz,et al.  Transducerless field orientation concepts employing saturation-induced saliencies in induction machines , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[26]  G.M. Asher,et al.  Sensorless position detection for vector controlled induction motor drives using an asymmetric outer-section cage , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[27]  Lennart Harnefors,et al.  Design and analysis of general rotor-flux-oriented vector control systems , 2001, IEEE Trans. Ind. Electron..

[28]  Mineo Tsuji,et al.  A sensorless vector control system for induction motors using q-axis flux with stator resistance identification , 2001, IEEE Trans. Ind. Electron..

[29]  Longya Xu,et al.  A new current model flux observer for wide speed range sensorless control of an induction machine , 2002 .

[30]  Mark Sumner,et al.  Suppression of saturation saliency effects for the sensorless position control of induction motor drives under loaded conditions , 2000, IEEE Trans. Ind. Electron..

[31]  Greg Asher,et al.  Sensorless speed detection of inverter fed induction motors using rotor slot harmonics and fast Fourier transform , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[32]  Hidehiko Sugimoto,et al.  Secondary Resistance Identification of an Induction-Motor Applied Model Reference Adaptive System and Its Characteristics , 1987, IEEE Transactions on Industry Applications.

[33]  Longya Xu,et al.  A new current model flux observer insensitive to rotor time constant and rotor speed for DFO control of induction machine , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[34]  Thomas A. Lipo,et al.  A Rotor Parameter Identification Scheme for Vector-Controlled Induction Motor Drives , 1985, IEEE Transactions on Industry Applications.