A novel sensorless direct torque control for matrix converter-fed IPM synchronous machine

A new sensorless direct torque control scheme for matrix converter-fed interior permanent magnet synchronous machine is investigated in this paper. Comparing to the classical DTC, the proposed scheme features in low ripples in torque and flux, fixed switching frequency and unity input power factor. Moreover, it significantly reduces the harmonics in the input current even with a small input filter. An adaptive observer is used for the joint estimation of stator flux and rotor speed. The sensorless DTC drive is capable of exhibiting high dynamic and steady-state performance. Experimental results confirm the effectiveness of the proposed method.

[1]  A. Tani,et al.  The use of matrix converters in direct torque control of induction machines , 1998, IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200).

[2]  I. Boldea,et al.  Polygonal Flux Modulation (pfm) In A.c. Drives , 1998, Proceedings of the 6th International Conference on Optimization of Electrical and Electronic Equipments.

[3]  Frede Blaabjerg,et al.  A Class of Speed-Sensorless Sliding-Mode Observers for High-Performance Induction Motor Drives , 2009, IEEE Transactions on Industrial Electronics.

[4]  Frede Blaabjerg,et al.  Comparative study of adaptive and inherently sensorless observers for variable-speed induction-motor drives , 2006, IEEE Transactions on Industrial Electronics.

[5]  M. F. Rahman,et al.  A Modified Direct Torque Control for a Matrix Converter-Fed Interior Permanent Magnet Synchronous Machine Drive , 2006 .

[6]  M.F. Rahman,et al.  A novel direct torque control for interior permanent magnet synchronous machine drive system with low ripple in torque and flux-a speed sensorless approach , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[7]  M.F. Rahman,et al.  A modified direct torque control for matrix converter drives , 2008, 2008 Australasian Universities Power Engineering Conference.