摘要
对直流调速系统运行时出现振荡的各种原因进行了全面的分析,包括速度调节器与电流调节器参数不当、速度反馈信号与速度给定信号纹波大、主回路输出电压波形缺相或脉动分量大、直流电动机电刷接触不良、电动机空载或轻载时电流断续、负载转动惯量较大等7个方面。针对每个方面存在的具体问题,提出了相应的改进措施来消除系统的振荡。对直流调速系统起动时出现振荡的原因进行了分析,提出了给系统设定两个输入电压(给定电压与退饱和电压),在起动过程中进行恰当切换,达到消除起动时振荡的的目的。给出了相应的电路,并对电路的工作原理进行了分析。
On the DC speed regulating system, different kinds of cause of operation time oscillation are analyzed, which contain seven aspects such as the speed regulator and current regulator parameter unmerited, speed feedback signal and setting signal ripple large,main circuit output voltage wavefoim open-phase or flutter component large, DC motor brush contact badness,DC motor no or small load time current uncontinuity,larger load moment of inertia. Aiming at each aspect existent concretion question,relevant improved measure is presented for eliminating its oscillation. On the DC speed regulating system,cause of start time oscillation is also analyzed. Idea of intercalating two input voltage （setting voltage and exiting saturation voltage）for the system and exact switch in the system start process is pointed, for the eliminating start time oscillation. Relevant circuit and its principle are analyzed.
出处
《电气传动自动化》
2007年第3期26-27,34,共3页
Electric Drive Automation
基金
湖南省教育厅科研基金资助项目(03C272)
关键词
直流调速系统
运行振荡
起动振荡
DC speed regulating system
operation time oscillation
start time oscillation
