摘要
永磁同步电机控制系统中快速稳定的电流内环是确保电机转矩控制性能的关键因素。制约电流环动、稳态性能的主要因素包括功率器件的开关频率和A/D采样、算法运算、PWM占空比更新等数字控制延时等。针对以上问题本文提出了一种基于双采样的无差拍预测电流控制方法,该方法在不增加逆变器开关频率的前提下,在三角载波的初始时刻和中间时刻进行两次A/D采样和PWM占空比更新。本文所提方法可以进一步提高系统的动、稳态性能,并通过仿真验证了该控制策略的有效性。
The fast and stable current inner loop in PMSM control system is the key factor to ensure the motor torque control performance. The main factors that restrict the dynamic stability and state performance of the current loop include the switching frequency of the power device and the digital control delay such as A/D sampling, algorithm operation, PWM duty cycle update, etc. In order to solve the above problems, this paper proposes a deadbeat predictive current control method based on double sampling and double updating. This method updates the A/D sampling and PWM duty cycle twice at the initial and intermediate time of the triangular carrier without increasing the switching frequency of the inverter. The proposed method can further improve the dynamic stability and state performance of the system, and the effectiveness of the control strategy is verified by simulation.
作者
王志强
杨明波
谢赛飞
姚波
WANG Zhi-qiang;YANG Ming-bo;XIE Sai-fei;YAO Bo(School of Artificial Intelligent,Tiangong University,Tianjin 300387;School of Electrical Engineering and Automation,Tiangong University,Tianjin 300387)
出处
《新型工业化》
2019年第12期1-6,共6页
The Journal of New Industrialization
基金
天津市自然科学基金(18JCQNJC74400)
