期刊文献+

电机软起动控制系统中功率因数角的研究 预览 被引量:79

RESEARCH ON DISPLACEMENT ANGLE IN THE CONTROL SYSTEM OF MOTOR SOFT STARTER
在线阅读 下载PDF
收藏 分享 导出
摘要 该文研究了三相异步电动机功率因数角随转速的变化规律,根据晶闸管调压电路的工作特点,分析了电机在调压起动过程中产生电流振荡的原因.提出了在电机软起动控制系统中应实施电机功率因数角闭环控制的观点,通过分析指出:晶闸管调压电路中可控的晶闸管触发角应该由两部分组成,一部分是按预定规律调整的角度,另一部分是跟随电机功率因数角的变化而增加的动态调整角度.实验证明,该闭环控制方法有效地解决了电机软起动过程中的电流震荡问题.同时,利用实时检测到的功率因数角信息,可以实现电机的轻载节能运行功能. In this paper, the rule of displacement angle vs. speed in a three-phase induction motor is investigated. Based on the operating principle of thyristor voltage controller, the cause of phase current oscillation during soft starting with a voltage regulator, is analyzed. It is proposed that the displacement angle closed loop control should be introduced in induction motor soft starter. Through analyzing, it is pointed out that the thyristor firing angle should be composed of two parts. One is obtained from the predetermined voltage control rule, and the other is the increase of dynamic regulating angle with the variation of displacement angle. The experiments prove that the proposed closed loop control method can avoid current oscillation during soft starting, and energy saving operation of the motor under light load can be realized by using the displacement angle detection in real time.
作者 王毅 赵凯岐 徐殿国 WANG Yi, ZHAO Kai-qi, XU Dian-guo (Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China)
机构地区 哈尔滨工业大学
出处 《中国电机工程学报》 EI CSCD 北大核心 2002年第8期 82-87,共6页 Proceedings of the CSEE
关键词 软起动控制系统 功率因数角 三相异步电机 asynchronous motors thyristors displacement angle
  • 相关文献

参考文献3

  • 1Sastry V V,Prasad M R,Sivakumar T V.Optimal soft starting of voltage-cont roller-fed IM drive based on voltage across thyristor [J].IEEE Trans on Power E lectronics,1997,12(6):1041-1051. 被引量:1
  • 2Zenginobuz G,Cadirci I,Ermis M,et al.Soft starting of large induction mo tors at constant current with minimized starting torque pulsations[C].Industry Applications Conference,2000.Conference Record of the 2000 IEEE,2000,3:1593 -1604. 被引量:1
  • 3Blaabjerg F,Pedersen J K,Rise S,et al.Can soft starters help save energ y[J].IEEE Industry Magazine,1997,(9/10):56-66. 被引量:1

同被引文献408

引证文献79

二级引证文献274

投稿分析
职称考试

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈