一种模型预测控制PMSM系统共模电压抑制策略
Common-mode voltage suppression strategy of PMSM system using model predictive control
郭玉敬 1张峻槐 1王帅 1金平1
作者信息
- 1. 河海大学 能源与电气学院,江苏 南京 211100
- 折叠
摘要
PWM共模电压干扰直接威胁逆变器驱动的电机系统安全和稳定性,针对模型预测控制的永磁同步电机系统提出了一种共模电压抑制策略,可分别采用电流扇区判定及开关函数直接控制两种方法,对死区开关管进行控制,通过改变电流续流路径,抑制共模电压幅值.建立系统的仿真模型,对抑制策略下的共模电压进行了仿真分析,并搭建了实验平台进行测量.仿真和实验数据表明,基于两种控制方法的抑制策略均可有效抑制系统共模电压,并减小单位时间内的开关次数及电流谐波含量,其中采用开关函数直接控制法的抑制效果更为显著,在不同转速下均能实现将CMV幅值抑制在Udc/6,且开关次数与传统方法相比下降约5%.
Abstract
PWM common-mode voltage(CMV)interference directly threatens the safety and stability of inverter driven motor system.According to the freewheeling principle of the switch,a CMV suppression strategy was proposed for the permanent magnet synchronous motor(PMSM)system using model predic-tive control,which can control the dead time switch tube by using two methods:current sector determina-tion and switch function direct control,and the CMV amplitude was suppressed by changing the current freewheeling path.The simulation model was established,the CMV under the suppression strategy was simulated and analyzed,and the experimental platform was implemented for measurement.The simulation and experimental results show that the proposed strategy based on the two control methods can effectively suppress the CMV and decrease the number of switches in unit time and current harmonics.Among them,the suppression effect of switching function direct control method is more significant,which sup-press the maximum value of common mode voltage at Udc/6 at different speeds,and the number of swit-ches is reduced by about 5%compared to traditional methods.
关键词
永磁同步电机/逆变器/PWM/共模电压抑制/模型预测控制/死区开关管控制Key words
PMSM/inverter/PWM/CMV suppression/model predictive control/dead band switch con-trol引用本文复制引用
基金项目
国家自然科学基金(51507051)
国家自然科学基金(51407061)
出版年
2024
NETL
NSTL
万方数据