摘要
针对PWM整流器中传统滞环电流控制方法因固定环宽而引起的功率管的开关频率变换剧烈、频率低时跟踪性差、频率高时开关损耗大等问题,对PWM整流器的电路拓扑、滞环电流控制方法下的电压环、电流环以及三相锁相环的工作原理进行了研究,对滞环电流的控制过程进行了归纳,提出了一种新型的电流自跟踪PWM控制策略,并对这种控制策略的作用机理进行了详尽的阐释。然后利用Matlab对电流自跟踪控制算法进行了系统仿真,同时又以数字信号处理器-DSP28035为核心,搭建了软、硬件平台,进行了实验验证。研究结果表明,电流自跟踪控制策略的输入电压与输入电流同相位,实际电流能够快速跟踪参考电流,能够实现功率因数校正,该种控制策略具有可行性和有效性。
Aiming at the problem which was the fixed width of the PWM control method of hysteresis current,which had cause several problems,such as the switch＇s frequency changing greatly,the real current could not fast track the given current when the frequency was low、the switch would consume a lot of power when the frequency was high,and so on. The rectifier＇s topology、the principle of current loop and voltage loop,which under the control method of hysteresis current and the principle of three phase locked loop had been studied. the control procedure also had been distilled. A new PWM control method of current automatic tracking was proposed,then the mechanism of this control strategy being detailed explanation. So not only the software-Matlab being used to simulate the control process,but also the digital signal processor-DSP28035 also being used to verify it. The results indicate that the input current and the input voltage has the same phase,the real current can fast track the current which was given,it can realize power factor correction.Furthermore,it proves the effectiveness and the feasibility of this control strategy.
出处
《机电工程》
CAS
2015年第4期557-560,共4页
Journal of Mechanical & Electrical Engineering
基金
广东省重大科技专项计划资助项目(2011AA080402010)
关键词
PWM整流器
电流自跟踪
控制策略
rectifier of pulse width modulation
current automatic tracking
control strategy
作者简介
周庆刚（1986-），男，河南南阳人，主要从事整流及逆变方面的研究．E-mail：1009828238@qq．com
