Abstract Synchronous reluctance motor (SynRM) has simple structure, low cost and high temperature resistance. However, its efficiency, power factor and other performance need to be improved. Direct torque control (DTC) can improve the torque response of SynRM. In this paper, space vector modulation (SVM) technology is used to improve the performance of traditional DTC. The control model is established on the a-b axis and only one PI controller is added. While maintaining the advantages of traditional DTC, such as simple control structure and fast torque response, the track of the stator flux linkage is more similar to a circle, thereby effectively reducing the torque ripple. In addition, considering the influence of saturation, the maximum torque per-ampere (MTPA) strategy is introduced to the improved DTC. The motor is controlled accurately to further reduce copper losses. The simulation and experimental results show that the control strategy has good performance. The SynRM presents fast speed and torque responses, small torque ripple and smooth flux track under the control.
Xu Xinyuan,Wang Yunchong,Shen Jianxin. Direct Torque Control-Space Vector Modulation Control Strategy of Synchronous Reluctance Motor Based on Maximum Torque Per-Ampere[J]. Transactions of China Electrotechnical Society, 2020, 35(2): 246-254.
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