摘要
采用小容值薄膜电容的内置式永磁同步电机驱动系统具有工作寿命长、成本低、功率密度高等优点。然而,在无电解电容系统中,直流母线电压以两倍于网侧电压的频率波动,这将会在反电势和磁链中产生大量额外频次的谐波,最终将导致无传感器控制出现较大的位置估计误差。因此,本文提出了一种应用于无电解电容系统无传感器控制的改进磁链观测器,用于估计转子位置和转速。与反电势模型相比,磁链模型中增加了一级积分环节,能在一定程度上抑制高频谐波。本文首先对无电解电容IPMSM驱动系统的特性进行分析,并确定了谐波出现的频率。其次,基于改进磁链观测器,设计了一种复合降阶准谐振滤波器来抑制磁链中的低频谐波并提取其基波分量。最后,通过实验结果验证了所提出控制策略的有效性。
The interior permanent magnet synchronous motor(IPMSM)drive using small capacitance film capacitor has the advantages of long working life,low cost,and high power density.However,the DC-link voltage fluctuates at twice the frequency of the grid-side voltage in reduced DC-link capacitance system,which will cause a lot of harmonics in the back electromotive force(BEMF)and flux linkage.Eventually this will result in a large position estimation error in sensorless control.Aiming at that,an improved flux linkage observer(FLO)applied to sensorless control was proposed to estimate the rotor position and speed.Compared to the BEMF model,an integration link was added in the flux linkage model,which could suppress the high frequency harmonics partly.The characteristics of the reduced DC-link capacitance IPMSM drive system were analyzed firstly,and the frequencies of the harmonic components were determined.Secondly,based on the FLO,a composite reduced-order quasi-resonant filter(CROQRF)was designed to suppress the low-frequency harmonics in the flux linkage and extract its fundamental component.Finally,the effectiveness of the proposed strategy was verified by experimental results.
作者
霍鲁杰
康广庆
丁文
张巍
HUO Lujie;KANG Guangqing;DING Wen;ZHANG Wei(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Xi’an Aerospace Propulsion Institute,Xi’an 710076,China;National Technology Transfer Center,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《微电机》
2025年第8期30-38,共9页
Micromotors
关键词
永磁同步电机
无电解电容
无位置传感器控制
磁链观测器
permanent magnet synchronous motor
reduced DC-link capacitance
sensorless control
flux linkage observer
作者简介
霍鲁杰(2000),男,硕士,研究方向为永磁同步电机控制;康广庆(1990),男,硕士,工程师,研究方向为电机控制;丁文(1981),男,博士,副教授,研究方向为电机设计与控制;张巍(1987),男,学士,工程师,研究方向为电机控制。
