An improved DTC algorithm for reducing torque ripples of PMSM based on fuzzy logic and SVM

There are big ripples on current and electromagnet torque under traditional hysteresis direct torque control (HDTC) on motor drive system. To solve these problems, a fuzzy logic controller is designed to instead traditional hysteretic comparator in this paper, and zero voltage vectors are used to further reduce ripples. The torque error, the flux error and stator flux position are used to select two adjacent active vectors and its ratio of active time. Zero voltage vectors effective time is determine by the output of fuzzy logic controller based on the torque error magnitude and flux error magnitude. Arranging the inverter switching in this manner, results in fast torque response and minimum torque ripples as compared to the traditional HDTC. The simulation results have verified the effectiveness of this method.

[1]  Kayhan Gulez,et al.  Minimum Torque Ripple Algorithm with Fuzzy Logic Controller for DTC of PMSM , 2007, ICIC.

[2]  M.N. Uddin,et al.  Fuzzy-logic-controller-based cost-effective four-switch three-phase inverter-fed IPM synchronous motor drive system , 2006, IEEE Transactions on Industry Applications.

[3]  J.M. Retif,et al.  Fixed-switching-frequency DTC control for PM synchronous machine with minimum torque ripples , 2008, Canadian Journal of Electrical and Computer Engineering.

[4]  Tao Zhang,et al.  Direct torque control of permanent magnet synchronous motor using space vector modulation , 2010, 2010 Chinese Control and Decision Conference.

[5]  Frede Blaabjerg,et al.  DSP based direct torque control of permanent magnet synchronous motor (PMSM) using space vector modulation (DTC-SVM) , 2002, Industrial Electronics, 2002. ISIE 2002. Proceedings of the 2002 IEEE International Symposium on.

[6]  Mengjia Jin,et al.  A fuzzy DTC method with a SVM defuzzification to permanent magnet synchronous machine , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[7]  Jawad Faiz,et al.  A novel technique for estimation and control of stator flux of a salient-pole PMSM in DTC method based on MTPF , 2003, IEEE Trans. Ind. Electron..

[8]  B. Singh,et al.  DSP Based Implementation of Fuzzy Precompensated PI Speed Controller for Vector Controlled PMSM Drive , 2006, 2006 1ST IEEE Conference on Industrial Electronics and Applications.

[9]  Dan Sun,et al.  Fuzzy logic direct torque control for permanent magnet synchronous motors , 2004, Fifth World Congress on Intelligent Control and Automation (IEEE Cat. No.04EX788).

[10]  Lixin Tang,et al.  A novel direct torque controlled interior permanent magnet synchronous machine drive with low ripple in flux and torque and fixed switching frequency , 2004, IEEE Transactions on Power Electronics.

[11]  K. Gulez,et al.  A Novel Direct Torque Control Algorithm for IPMSM With Minimum Harmonics and Torque Ripples , 2007, IEEE/ASME Transactions on Mechatronics.

[12]  Casey B. Butt,et al.  Simplified fuzzy logic based MTPA speed control of IPMSM drive , 2003 .

[13]  T. S. Radwan,et al.  Fuzzy logic controller based cost effective 4-switch, 3-phase inverter fed IPM synchronous motor drive system , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[14]  K. W. Lim,et al.  Analysis of direct torque control in permanent magnet synchronous motor drives , 1997 .

[15]  M.A. Hoque,et al.  Simplified fuzzy-logic-based MTPA speed control of IPMSM drive , 2003, IEEE Transactions on Industry Applications.

[16]  Tian Yantao,et al.  A sensorless initial rotor position estimation scheme and an Extended Kalman Filter observer for the direct torque controlled Permanent Magnet Synchronous Motor Drive , 2008, 2008 International Conference on Electrical Machines and Systems.

[17]  J. Partanen,et al.  FEM calculation of rotor losses in a medium speed direct torque controlled PM synchronous motor at different load conditions , 2002 .