摘要
针对永磁同步电机(PMSM),在传统PI控制时易出现转速超调、冲击电流大、转速环抗负载扰动能力差等现象,通过对PMSM数学模型的推导分析以及基于PI控制理论,提出了一种基于电磁转矩的新型变结构PI(VSPI)控制方法。该方法是在传统PI控制VSPI的基础上,通过融合微分前馈控制以及引入转矩反馈量等闭环控制策略,较好地解决了转速超调以及系统的抗干扰性等问题,并给出了电磁转矩的电压电流混合观测模型结构以及计算方法,同时分析了开环增益变化给予系统稳定性的影响情况,最后通过仿真试验验证了该新型方法的可行性和有效性。
In the traditional PI speed control of permanent magnet synchronous motor(PMSM),there exists speed overshoot,large impulse current and poor anti-load-disturbance ability of speed loop.To solve these problems,a new variable structure PI(VSPI)control method based on the electromagnetic torque is proposed by deducing the mathematical model of PMSM and analyzing the PI control theory.On the basis of traditional PI control and VSPI control,the problems of speed overshoot and anti-disturbance are well solved by closed-loop control strategies such as fusing differential feedforward control and introducing torque feedback closed-loop control strategies.A voltage-current hybrid observation model and the corresponding calculation method are proposed for electromagnetic torque.Meanwhile,the influence of open-loop gain variation on system stability is analyzed in detail.Finally,the feasibility and effectiveness of the proposed method are verified by simulation.
作者
戴连盟
卢秀和
DAI Lianmeng;LU Xiuhe(College of Electrical and Electronics Engineering,Changchun University of Technology,Changchun 130012,China)
出处
《电机与控制应用》
2020年第9期22-28,共7页
Electric machines & control application
基金
吉林省科技厅科技发展计划项目(20170204038SF)。
关键词
永磁同步电机
PI控制
变结构PI控制
电磁转矩
抗负载扰动能力
permanent magnet synchronous motor(PMSM)
PI control
variable structure PI control(VSPI)
electromagnetic torque
anti-load-disturbance ability
