摘要
为了降低无位置传感器永磁同步电机矢量控制系统的复杂程度和成本,采用单电流传感器直流母线电流采样法对三相电流进行重构,并采用脉冲移位法减少电流重构盲区。针对脉冲移位引入的三相电流畸变、谐波增加以及影响滑模观测器估计转子位置角的问题,提出了改进型脉冲移位法。该改进方法通过插入补偿矢量的方式恢复了驱动信号的对称状态,降低了脉冲移位对相电流的影响。通过仿真和实验验证了改进方法的可行性与有效性。结果表明所提出的改进型脉冲移位法可改善相电流波形并提高滑模观测器对转子位置角的观测精度,相电流总谐波失真率由使用一般脉冲移位法的12.53%降低至6.21%,而转子位置角观测最大误差由0.08 rad减小至0.01 rad,有效提高了控制系统可靠性。
To minimize the complexity and cost of the vector control system of the position sensorless permanent magnet synchronous motor(PMSM),the single current sensor DC bus current sampling method is adopted to reconstruct the three-phase current,and the pulse shift method is used to reduce the blind area of current reconstruction.To address the issues of three-phase current distortion and increased harmonics,and the influence of sliding mode observer(SMO)on the rotor position angle estimation introduced by pulse shift,an improved pulse shift method is proposed.The improved method restores the symmetrical state of the drive signal by inserting a compensation vector,which can reduce the influence of the pulse shift on the phase current.The feasibility and effectiveness of the improved method are verified by simulation and experiment.The results demonstrate that the proposed method significantly improves the phase current waveform and substantially increases the accuracy of rotor position angle observation through the sliding mode observer.The total harmonic distortion(THD)of the phase current was reduced from 12.53%using the general pulse shift method to 6.21%,and the maximum error in the observation of the rotor position angle was reduced from 0.08 rad to 0.01 rad,the reliability of the control system was significantly enhanced.
作者
任天明
王妲
冯明
REN Tianming;WANG Da;FENG Ming(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《中国惯性技术学报》
北大核心
2025年第5期517-524,共8页
Journal of Chinese Inertial Technology
基金
国家重点研发计划(2022YFB3402701)。
关键词
永磁同步电机
相电流重构
无位置传感器
单电流传感器
脉冲移位法
permanent magnet synchronous motor
phase current reconstruction
position sensorless
single current sensor
pulse shift method
