基于PWM长线驱动系统模型的变频器输出端RLC滤波器设计  

Design of Inverter Output RLC Filter Based on the Model of PWM Long Drive System

作　　者：姜艳姝[1] 于晓洋[1] 齐路路[1] 

机构地区：[1]哈尔滨理工大学自动化系,黑龙江省哈尔滨市150080

出　　处：《中国电机工程学报》2010年第36期93-97,共5页Proceedings of the CSEE

基　　金：黑龙江省教育厅基金项目(11511062)~~

摘　　要：在远距离脉宽调制(pulse width modulation,PWM)驱动系统中,RLC滤波器常用在变频器输出端来抑制电机端的过电压现象。但是,有关RLC滤波器参数的设计方法研究较少。研究一种综合考虑电缆长度、电缆电感、电感电抗、电压反射系数等参数的RLC滤波器参数的设计方法。首先建立基于传输线理论的远距离PWM驱动系统模型,得出该系统的传递函数,然后分析加入RLC滤波器后的系统模型及其传递函数,在此基础上,得出考虑电缆参数的RLC滤波器的传递函数,进而得出滤波器参数的设计方法。仿真和实验验证了所提设计方法的有效性。Resistance-inductance-capacitance（RLC） filters are usually used at the inverter side to suppress over-voltage phenomena at the motor terminal in long distance pulse width modulation（PWM） driving system.However,there is little clear optimal method to determine the filter parameters.In this paper,a filter design method was proposed which the parameters such as cable length,cable inductance,cable capacitance,reflection coefficient,were considered synthetically.Firstly,the model of the long distance PWM driving system was founded based on transmission theory and its transfer function was educed,then the model with RLC filter was also founded and its transfer function was educed.Thus,the transfer function of RLC filter was established considering cable parameters,and the filter design method was obtained.The validity of the proposed design method was supported by simulation and experimental results.

关 键 词：过电压 传输线理论 RLC滤波器 电缆参数 

分 类 号：TM464[电气工程—电器]