Thermal and slip effects on rotor time constant in vector controlled induction motor drives

In this paper, the fast variation of rotor resistance due to winding temperature is shown. Thus, the rotor time constant in the vector controlled induction motor drives, in contrary to common belief, changes fast via temperature. Moreover, it depends on the motor slip. The slip dependency of rotor time constant is due to motor loss that is usually ignored. The iron and stray loss is introduced in the induction machine dynamic and static models and a new expression of the rotor time constant is derived, that contains the motor slip. Thus, the rotor time constant rapidly varies at load torque changes. A novel slip frequency calculation procedure is proposed that ensures the accurate and fast estimation of the valid machine rotor time constant. The above aspects have been verified by extensive simulation and experimental tests in a wide speed-torque range.

[1]  Faa-Jeng Lin,et al.  A high-performance induction motor drive with on-line rotor time-constant estimation , 1997 .

[2]  Emil Levi.  Impact of iron loss on behaviour of vector controlled induction machines , 1994 .

[3]  Gopal Dubey.  Power Semiconductor Controlled Drives , 1989 .

[4]  Slobodan N. Vukosavic,et al.  On-line tuning of the rotor time constant for vector-controlled induction motor in position control applications , 1993, IEEE Trans. Ind. Electron..

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

[6]  Kwanghee Nam,et al.  A vector control scheme for EV induction motors with a series iron loss model , 1998, IEEE Trans. Ind. Electron..

[7]  M. S. Nait Said,et al.  Induction motors direct field oriented control with robust on-line tuning of rotor resistance , 1999 .

[8]  Tsuneo Kume,et al.  High-Performance Vector-Controlled AC Motor Drives: Applications and New Technologies , 1987, IEEE Transactions on Industry Applications.

[9]  Alfonso Damiano,et al.  Induction motor drive parameters identification , 1996, V IEEE International Power Electronics Congress Technical Proceedings, CIEP 96.

[10]  R. Kerkman,et al.  A new flux and stator resistance identifier for AC drive systems , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[11]  A. Dittrich.  Parameter sensitivity of procedures for on-line adaptation of the rotor time constant of induction machines with field oriented control , 1994 .

[12]  P. K. Sen,et al.  Derating of induction motors due to waveform distortion , 1990 .

[13]  J. C. Andreas.  Energy-Efficient Electric Motors Selection and Application , 1982 .

[14]  E. Levi.  Impact of iron loss on behaviour of vector controlled induction machines , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[15]  Cursino B. Jacobina,et al.  Linear parameter estimation for induction machines considering the operating conditions , 1999 .

[16]  Thomas A. Lipo,et al.  An automated rotor time-constant measurement system for indirect field-oriented drives , 1988 .

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

[18]  T.M. Rowan,et al.  A simple on-line adaptation for indirect field orientation of an induction machine , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[19]  W. R. Finley,et al.  Copper versus aluminum-which construction is best? [induction motor rotors] , 2002 .

[20]  Russel J. Kerkman.  Steady-State and Transient Analyses of an Induction Machine with Saturation of the Magnetizing Branch , 1985, IEEE Transactions on Industry Applications.

[21]  Cursino Brandão Jacobina,et al.  Parameter sensitivity of MRAC models employed in IFO-controlled AC motor drive , 1997, IEEE Trans. Ind. Electron..

[22]  Bimal K. Bose,et al.  Power Electronics and Ac Drives , 1986 .

[23]  Paul C. Krause,et al.  Analysis of electric machinery , 1987 .

[24]  P. L. Alger,et al.  Stray-Load Losses in Polyphase Induction Maclines , 1959, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[25]  T. Green,et al.  Steady-state control of an induction motor by estimation of stator flux magnitude , 1991 .

[26]  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..

[27]  Emil Levi,et al.  Iron loss in rotor-flux-oriented induction machines: identification, assessment of detuning, and compensation , 1996 .

[28]  Iordanis Kioskeridis,et al.  Loss minimization in induction motor adjustable-speed drives , 1996, IEEE Trans. Ind. Electron..

[29]  Seung-Ki Sul.  A novel technique of rotor resistance estimation considering variation of mutual inductance , 1989 .

[30]  Lu Zhen,et al.  Sensorless field orientation control of induction machines based on a mutual MRAS scheme , 1998, IEEE Trans. Ind. Electron..

[31]  T.A. Lipo,et al.  A simple and robust adaptive controller for detuning correction in field oriented induction machines , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[32]  Cursino B. Jacobina,et al.  On-line estimation of the stator resistance of induction machines based on zero-sequence model , 2000 .

[33]  R.D. Lorenz,et al.  A simplified approach to continuous, online tuning of field oriented induction machine drives , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[34]  Matthew W. Dunnigan,et al.  A new method of rotor resistance estimation for vector-controlled induction machines , 1997, IEEE Trans. Ind. Electron..

[35]  Paul G. Cummings,et al.  Induction Motor Efficiency Test Methods , 1981, IEEE Transactions on Industry Applications.

[36]  Toshihiko Noguchi,et al.  Field-oriented control of an induction motor with robust on-line tuning of its parameters , 1997 .