Abstract：The traditional central 60° synchronous modulation has poor dynamic performance, because its switching sequence is based on Fourier analysis of the steady-state voltage. Based on basic principles research and simulation, this paper points out the key question of special pulse-width modulation dynamic performance is that stator harmonic currents is consecutive or not. Comparison of existing related solutions, a central 60° synchronous modulation based on PMSM (permanent magnet synchronous motor) stator flux trajectory control is proposed. In this method, the PMSM stator flux is the object for observation and control. Switching sequences of conventional method is modified based on the error value between calculated flux and observed flux. Then, continuity of the current trajectory and the stator flux trajectory is guaranteed, the system dynamic performance will be better. A detailed flow chart of the control signal transmission is given. Calculated and observed method of flux is determined. Based on the definition and formula of key variables, basic rules of the switching sequence amendment are proposed. The method is verified by simulation and experiment.
方晓春, 原佳亮, 赵冬, 林飞, 杨中平. 基于永磁同步电机定子磁链轨迹跟踪间60°同步调制动态性能优化[J]. 电工技术学报, 2015, 30(10): 108-114.
Fang Xiaochun, Yuan Jialiang, Zhao Dong, Lin Fei, Yang Zhongping. The Central 60° Synchronous Modulation Based on Permanent Magnet Synchronous Motor Stator Flux Trajectory Control. Transactions of China Electrotechnical Society, 2015, 30(10): 108-114.
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