An improved direct torque control for matrix converter driven interior permanent magnet synchronous motor

This paper presents an improved direct torque control (DTC) scheme based on indirect space vector modulation (ISVM) for matrix converter drives. Independent closed-loop control of both torque and stator flux is achieved by using two proportional-integral (PI) controllers. The reference voltages generated by the two PI controllers are provided for an ISVM unit which replaces the switching tables in the basic DTC scheme. The proposed DTC scheme is characterized by reduced torque and flux ripples, unity input power factor and sinusoidal input/output waveforms, while maintaining constant switching frequency and fast torque dynamics. To preserve the DTC transient merits, the ISVM is switched to an over modulation mode when the reference voltage exceeds the saturation point for PI regulators. Otherwise, the other two linear modulation modes, utilizing medium and maximum line-to-line voltages respectively, will be employed to improve the steady-state performance in the different range of output voltage.

[1]  Antoni Arias,et al.  The Use of Small Voltage Vectors of Matrix Converters in Direct Torque Control of Induction Machines , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[2]  José R. Rodríguez,et al.  Matrix converters: a technology review , 2002, IEEE Trans. Ind. Electron..

[3]  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).

[4]  A. Alesina,et al.  Analysis and design of optimum-amplitude nine-switch direct AC-AC converters , 1989 .

[5]  Frede Blaabjerg,et al.  An improved DTC-SVM method for matrix converter drives using a deadbeat scheme , 2006 .

[6]  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).

[7]  D. Xiao,et al.  Direct Torque Control for Interior Permanent Magnet Synchronous Motors Using Matrix Converters , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[8]  Kai-Chao Yao,et al.  Direct Torque Control for a Matrix Converter Based on Induction Motor Drive Systems , 2007, Second International Conference on Innovative Computing, Informatio and Control (ICICIC 2007).

[9]  Frede Blaabjerg,et al.  Evaluation of modulation schemes for three-phase to three-phase matrix converters , 2004, IEEE Transactions on Industrial Electronics.

[10]  Frede Blaabjerg,et al.  An Improved DTC-SVM Method for Sensorless Matrix Converter Drives Using an Overmodulation Strategy and a Simple Nonlinearity Compensation , 2007, IEEE Transactions on Industrial Electronics.

[11]  D. Borojevic,et al.  Space vector modulated three-phase to three-phase matrix converter with input power factor correction , 1995 .

[12]  S. Munk-Nielsen,et al.  A novel loss reduced modulation strategy for matrix converters , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).