摘要
五相永磁电机传统直接转矩控制(direct torque control,DTC)方法存在转矩与磁链脉动过大以及相电流谐波畸变率较高的问题,而利用空间电压矢量调制技术的DTC方法,其实现过程较为复杂、运算量大且参数调节难度增加。为解决上述问题,该文提出了一种基于三次谐波抑制的改进型DTC策略,该策略充分考虑了五相电机所特有的三维子空间,可在保持电机良好动态响应性能的同时,有效减小转矩和磁链脉动,并大幅降低相电流的三次谐波含量。同时,该策略保持了DTC运算简便和结构简洁的初衷。仿真和实验结果证明了理论分析的正确性及所提控制策略的可行性。
Traditional direct torque control （DTC） has many problems such as high harmonic distortion of phase current and significant ripples both on torque and flux linkage in five-phase permanent magnet motor drive, while the DTC based on space vector modulation technique suffers from the heavy computation and the difficulty of realization and parameter adjustment. To solve these problems, a DTC strategy based on third-harmonic suppression of five-phase permanent magnet motor was proposed in this paper. The proposed strategy fully considered the three dimensional subspace of the five phase motor, which can effectively reduce the ripples of torque and flux and the third harmonic content of phase current while ensuring excellent dynamic performance of the DTC system. Besides, the proposed strategy maintained the original intention of DTC, including the simple operation and concise structure. The simulation and experimental results verify the theoretical analysis of the proposed control strategy.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第14期4212-4221,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(61273154
51407086)
江苏省杰出青年基金(BK20130011)
江苏省高校自然科学研究重大项目(15KJA470002)
江苏省高校优势学科项目~~
关键词
五相永磁电机
直接转矩控制
三次谐波抑制
转矩脉动
动态性能
five phase permanent magnet motor
direct torque control （DTC）
third-harmonic suppression
torque ripple
dynamic performance
