摘要
提出了以ds PIC为控制核心的交流接触器数字化控制技术.对BUCK电路进行改造作为线圈供电主回路,分别利用数字PI和流限开/关,实现了线圈电流的闭环控制,使得吸合过程的吸反力合理配合,减小触头和铁芯的弹跳与碰撞,提高电寿命.可靠吸合后,切断PWM斩波信号,转入直流低压运行,能耗小、无噪声.分断时,采用负压控制,线圈能量被快速吸收,提高了接触器的分断速度.通过PROTEUS软件对吸合、吸持和分断过程进行仿真,有助于智能控制模块的设计及控制方案的分析.相关试验结果表明,数字化控制技术改善了交流接触器各项性能指标,具有较好灵活性、通用性.
Digital control is put forward into AC contactors with dsPIC .Coil supply circuit is modified from BUCK whose current can be closed -loop in real -time by digital PI or on/off.The dynamic attraction and counterforce of contactor fit well in making to reduce the bounce or collision of contact and core , so the lifetime of AC contactors prolonged .Cutting off the PWM , keeping coil current in a low to save energy and undo noise after making stable .In breaking , the negative-voltage is adopted to enhance the break speed .Entire process of contactors are simulated by PROTEUS to guide the design of intelligent module and the analysis of control scheme .It also verified by experiments , which show that the digital control is flexibility and universality to improve the performance of AC contactors .
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2015年第5期636-641,共6页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(51277031)
