Novel Voltage Trajectory Control for Field-Weakening Operation of Induction Motor Drives

This paper proposes a new voltage trajectory control for the field-weakening operation of induction motor drives. The presented method does not require a lookup table and reduces the parameter sensitivity. Moreover, the dc-link voltage utilization can be extended such that the voltage can reach the hexagon trajectory of the space vector of the voltage. The difference between the switching period and the summation of active switching times for inverter pulsewidth modulation control is used for field-weakening control. As the summation of the active switching times is less than its switching period, constant torque is retained. In contrast, the field-weakening control is considered. Smooth and automatic transition between two field-weakening regions can be achieved by the calculated q-axis current subjected to the voltage, current, and maximum pullout torque constraints. Experimental and simulation results will be presented to fully support the claims.

[1]  Seung-Ki Sul,et al.  Maximum torque control of an induction machine in the field weakening region , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[2]  Y. S. Lai.  Machine Modeling and Universal Controller for Vector-Controlled Induction Motor Drives , 2002, IEEE Power Engineering Review.

[3]  Seung-Ki Sul,et al.  Voltage control strategy for maximum torque operation of an induction machine in the field weakening region , 1994, Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics.

[4]  Seung-Ki Sul,et al.  Voltage control strategy for maximum torque operation of an induction machine in the field-weakening region , 1997, IEEE Trans. Ind. Electron..

[5]  R. S. Wieser.  Optimal rotor flux regulation for fast accelerating induction machines in the field weakening region , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[6]  D. Casadei,et al.  Stator Flux Vector Control of Induction Motor Drive in the Field Weakening Region , 2008, IEEE Transactions on Power Electronics.

[7]  H. Grotstollen,et al.  Field weakening of induction motors in a very wide region with regard to parameter uncertainties , 1996, PESC Record. 27th Annual IEEE Power Electronics Specialists Conference.

[8]  Lennart Harnefors,et al.  Optimum-seeking field weakening control of induction motor drives , 2000 .

[9]  G. Gallegos-Lopez,et al.  Current Control of Induction Machines in the Field-Weakened Region , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[10]  X. Xu,et al.  Selecting the flux reference for induction machine drives in the field weakening region , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[11]  D. Hyun,et al.  Maximum torque control of stator flux-oriented induction machine drive in the field weakening region , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[12]  Seung-Ki Sul,et al.  Transient torque maximizing strategy of induction machine in field weakening region , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[13]  H. Abu-Rub,et al.  Maximum Torque Production in Rotor Field Oriented Control of an Induction Motor at Field Weakening , 2007, 2007 IEEE International Symposium on Industrial Electronics.

[14]  D. Casadei,et al.  A Robust Method for Field Weakening Operation of Induction Motor Drives with Maximum Torque Capability , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[15]  Lennart Harnefors,et al.  Torque-maximizing field-weakening control: design, analysis, and parameter selection , 2001, IEEE Trans. Ind. Electron..

[16]  D. Casadei,et al.  Field-weakening control schemes for high-speed drives based on induction motors: a comparison , 2008, 2008 IEEE Power Electronics Specialists Conference.

[17]  H. Abu-Rub,et al.  Sensorless Control of Induction Motors for Maximum Steady-State Torque and Fast Dynamics at Field Weakening , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[18]  H. Grotstollen,et al.  Control of induction motor with orientation on rotor flux or on stator flux in a very wide field weakening region-experimental results , 1996, Proceedings of IEEE International Symposium on Industrial Electronics.

[19]  J. Holtz,et al.  Rotor Oriented Nonlinear Controlsystem of Induction Motors Operatingat Field Weakening , 2007, IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society.

[20]  H. Abu-Rub,et al.  Speed sensorless nonlinear control of induction motor in the field weakening region , 2008, 2008 13th International Power Electronics and Motion Control Conference.