A Modified of DTC Control Applied to Novel FI- PMA-SynRM for Torque Ripple Reduction

In this paper, an improved direct torque control (DTC) for novel flux intensifying permanent magnet assisted synchronous reluctance motor (FI-PMa-SynRM) is developed to reduce the torque- and flux-ripple. The salient feature of FI- PMa-SynRM is the ability to enhance the output torque and prevent PM from demagnetization although the PM amount utilized is minimum. To reach such feature, the maximum torque per ampere (MTPA)-based DTC control should be applied to FI-PMa-SynRM firstly, and the torque ripple is also investigated. T o reduce the torque ripple, the effect of stator flux errors is eliminated in the calculations of amplitude of voltage command, which is composited in the space vector modulation (SVM). The proposed DTC is comparatively investigated with the existing DTC in both computer simulation and experimental validation. The results validate that the modified DTC model achieves better torque ripple reduction and that on the other hand, dynamic response of modified DTC is lower than that of the conventional DTC.

[1]  Wenxin Huang,et al.  Maximum Torque per Ampere Control Based on Active Flux Concept for DTC of IPMSMs , 2018, 2018 IEEE Energy Conversion Congress and Exposition (ECCE).

[2]  Lixin Tang,et al.  A novel direct torque control scheme for interior permanent magnet synchronous machine drive system with low ripple in torque and flux, and fixed switching frequency , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[3]  Yen-Shin Lai,et al.  A New Approach to Direct Torque Control of Induction Motor Drives for Constant Inverter Switching Frequency and Torque Ripple Reduction Yen-Shin Lai, Member, IEEEand Jian-Ho Chen , 2001 .

[4]  Longya Xu,et al.  A sensorless direct torque control technique for permanent magnet synchronous motors , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[5]  Min-Fu Hsieh,et al.  Torque Enhancement for a Novel Flux Intensifying PMa-SynRM Using Surface-Inset Permanent Magnet , 2019, IEEE Transactions on Magnetics.

[6]  Gilbert Hock Beng Foo,et al.  A Simple Duty Cycle Control Strategy to Reduce Torque Ripples and Improve Low-Speed Performance of a Three-Level Inverter Fed DTC IPMSM Drive , 2017, IEEE Transactions on Industrial Electronics.

[7]  Yongchang Zhang,et al.  A Novel Duty Cycle Control Strategy to Reduce Both Torque and Flux Ripples for DTC of Permanent Magnet Synchronous Motor Drives With Switching Frequency Reduction , 2011, IEEE Transactions on Power Electronics.

[8]  Yongchang Zhang,et al.  A Simple Method to Reduce Torque Ripple in Direct Torque-Controlled Permanent-Magnet Synchronous Motor by Using Vectors With Variable Amplitude and Angle , 2011, IEEE Transactions on Industrial Electronics.

[9]  Xingyu Wang,et al.  Duty Ratio Modulation Strategy to Minimize Torque and Flux Linkage Ripples in IPMSM DTC Systems , 2017, IEEE Access.

[10]  Yuan Ren,et al.  Reduction of Both Harmonic Current and Torque Ripple for Dual Three-Phase Permanent-Magnet Synchronous Machine Using Modified Switching-Table-Based Direct Torque Control , 2015, IEEE Transactions on Industrial Electronics.