文档介绍：三相异步电动机节能保护器的设计
摘要
三相交流异步电动机的节能一直是电机领域探究的热点,非凡是近几年来全国出现电力供给紧张的局面,使得对交流异步电动机的节能设备的探究和推广更为迫切。但目前市面上的节能设备普遍存在成本过高的现象,这在一定程度上阻碍了异步电动机节能设备的推广使用。本文从分析异步电动机的功率损失入手,阐述了三相异步电动机Δ-Y切换降压运行的工作特性、节能原理、节电效果、节能保护器应采取的抗干扰办法以及其它应注重的新问题。并在此基础上提出了一整套单片机控制的三相异步电动机Y/Δ切换节能保护器的设计方案,获得了较高的性价比。并针对传统电动机Y/Δ切换节能保护器在Y/Δ切换点四周发生频繁切换的新问题,提出手动现场整定临界负载率和切换时间的解决办法。最后,制作出了一台试验样机并进行了性能测试,实验结果表明,样机达到了预期的控制性能和节能效果,验证了方案的可行性。本文还在实验结果的基础上进行了深入的分析和讨论,为进一步完善本方案提出了改进的方向和办法。
关键词:异步电动机节能Y/△切换单片机
The Design of Three-phase Asynchronous Motor Protection
Abstract
Three-phase AC induction motor is the motor in the field of energy saving has been exploring the hot and extraordinary in recent years the country and the power supply tension, makes the AC induction motor energy saving devices and promote a more urgent inquiry. Energy-saving equipment available in the market but widespread phenomenon of high cost, which to some extent, hindered the induction motor promote the use of energy-saving equipment. From the analysis of induction motor starting power loss to explain the three-phase asynchronous motor Δ-Y switch step-down operation of job characteristics, energy principles, energy-saving effect, energy conservation should take anti-jamming devices and other measures should focus on new issues . And puts forward a set of puter-controlled induction motor Y / Δ switching energy protector design, get a higher cost. And traditional motor Y / Δ switching energy protector in Y / Δ frequent switching occurs around the switching point of the new problems raised manually setting the scene critical load rate and switching time solutions. Finally, make out a test prototype and carried out performance testing, test results show that the prototype to achieve the expected control performance and energy saving effect, verify the feasibility. This is also the basis of experimental results conducted in-depth analysis and discussion, in order to further improve the program proposed to improve the direction and approach.
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