Sensorless control of inverter-fed induction motor drives

Abstract Sensorless control is considered to be a lower cost alternative than the position or speed encoder-based control of induction motors. Two popular sensorless control methods, namely, the model reference adaptive system (MRAS) and the Luenberger observer (LO) methods are compared for speed and torque control characteristics. They are also compared against the well-known vector control principle. For the drive system simulated, the torque and speed obtained from sensorless control are almost identical to those obtained from the vector control method. However, the torque ripple for the sensorless methods is observed to be higher than vector control-based method. The MRAS method introduces higher torque ripple when compared to the Luenberger observer. In addition, speed estimation methods employed in sensorless control are more sensitive to motor parameter variations.

[1]  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,.

[2]  C. C. Chan,et al.  Adaptive decoupling control of induction motor drives , 1990 .

[3]  van der Arjan Schaft,et al.  Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society, 1998 , 1998 .

[4]  K. Matsuse,et al.  Speed sensorless field oriented control of induction motor with rotor resistance adaptation , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[5]  Bimal K. Bose,et al.  Modern Power Electronics and AC Drives , 2001 .

[6]  K. Matsuse,et al.  Robust field oriented induction motor drives based on disturbance torque estimation without rotational transducers , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[7]  Joachim Holtz.  Sensorless position control of induction motors-an emerging technology , 1998, IEEE Trans. Ind. Electron..

[8]  Francesco Profumo,et al.  Comparison of different schemes without shaft sensors for field oriented control drives , 1994, Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics.

[9]  Mark Sumner,et al.  Dynamic performance limitations for MRAS based sensorless induction motor drives. Part 1: Stability analysis for the closed loop drive , 1996 .

[10]  Longya Xu,et al.  A mutual MRAS identification scheme for position sensorless field orientation control of induction machines , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[11]  L. Ben-Brahim,et al.  Survey of speed sensorless controls for IM drives , 1998, IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200).

[12]  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.

[13]  Robert D. Lorenz.  Tuning of Field-Oriented Induction Motor Controllers for High-Performance Applications , 1986, IEEE Transactions on Industry Applications.

[14]  Mark Sumner,et al.  Dynamic performance limitations for MRAS based sensorless induction motor drives. Part 2: Online parameter tuning and dynamic performance studies , 1996 .

[15]  Peter Vas,et al.  Sensorless vector and direct torque control , 1998 .

[16]  Scott D. Sudhoff,et al.  Analysis of Electric Machinery and Drive Systems , 1995 .

[17]  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.