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                Suzhou Electric Appliance Research Institute
                期刊号: CN32-1800/TM| ISSN1007-3175

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                基于占空比调↘制的新型十八扇区直接转矩∑ 研究

                来源:电工电气发布时间:2020-07-16 14:16 浏览次数:37
                基于占空不过比调制的新型十八扇区直接转矩研殿主走到面前盘膝而坐究
                 
                吴中豪,周洁敏,李涛,朱紫涵
                (南京航△空航天大学 民航学院,江苏 南京 211000)
                 
                    摘 要:传统永磁绝对可以让我同步电机直@ 接转矩控制稳态运行时,存在定子磁链幅值和电磁转矩脉动较大的问题。分析了■有效电压矢量对于定子磁链和转矩控制效果的不平衡问题,基于扇区细分的思告诉他们想,并结合三电平逆变器新增的6个有效@电压矢量,提出了新型十八扇区直接转矩怎么样控制♀方法,以此来改善电压矢量≡的控制效果。针对传统〇直接转矩控制中,由于整个采样周期施加同一电压↓矢量而带来的过补偿问♀题,采用占空比调制减小转矩脉微微一愣动。与传统直∮接转矩控制效果进行仿真对比,验证了所〓提新型控制策略减小定子磁链和电磁转矩波动的有◥效性。
                    关键词:永磁同步电机;直接转矩控制;占空比调制
                    中图分类号:TM341     文献标识码:A     文章编号:1007-3175(2020)07-0013-06
                 
                New Eighteen-Sector Direct Torque Control Based on Duty Ratio Modulation
                 
                WU Zhong-hao, ZHOU Jie-min, LI Tao, ZHU Zi-han
                (College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211 000, China)
                 
                    Abstract: In the traditional direct torque control (DTC) of permanent magnet synchronous motor (PMSM) in steady state operation, the ripple of stator flux linkage amplitude and electromagnetic torque is large.In this paper, the unbalance problem of the effect of active voltage vectors on stator flux linkage and torque control is analyzed.Based on the idea of sector subdivision, combined with the six new active voltage vectors added by the three-level inverter, a new eighteen-sector direct torque control method is proposed to improve the control effect of voltage vectors.For the overcompensation problem caused by the voltage vector acting on a whole sampling period in DTC, the duty ratio modulation (DRM) method is used to reduce the torque ripple.Compared with the control effect of traditional direct torque, the effectiveness of the proposed new control strategy to reduce the ripple of stator flux linkage and electromagnetic torque is verified.
                    Key words: permanent magnet synchronous motor; direct torque control; duty ratio modulation
                 
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