PLC based power factor correction of 3-phase Induction Motor

2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES) Pub Date : 2016-07-04 DOI:10.1109/ICPEICES.2016.7853637

R. Jain, Shashank Sharma, M. Sreejeth, Madhusudan Singh

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引用次数: 8

Abstract

A Programmable Logic Controller (PLC) based power factor correction method for a 3-phase Induction Motor (IM) through switching of shunt capacitors is proposed in this paper. A 3 phase IM has a low power factor (pf) at no load as it draws large magnetizing current and the active power delivered to the motor is low, which is utilized to overcome the no-load losses. The PLC based power factor improvement algorithm is developed and implemented on a 3 Phase laboratory prototype IM coupled to a DC generator and the effectiveness of the algorithm is tested under no-load and loaded condition. Based on the instantaneously measured value of power factor, the PLC switches the appropriate bank of capacitors into the circuit depending on the load condition to improve the pf. Large scale use of PLC in industrial automation, adaptability, simple implementation and economics justified its selection as the switching controller. A significant improvement in power factor under different loading conditions is observed.

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基于PLC的三相异步电动机功率因数校正

提出了一种基于可编程控制器(PLC)的三相异步电动机功率因数校正方法，通过并联电容的开关进行功率因数校正。三相IM在空载时具有低功率因数(pf)，因为它会产生大的磁化电流，并且传递给电机的有功功率很低，这被用来克服空载损耗。开发了基于PLC的功率因数改进算法，并在与直流发电机耦合的三相实验室样机上实现了该算法，并在空载和有载条件下测试了算法的有效性。PLC根据功率因数的瞬时测量值，根据负载情况将相应的电容器组切换到电路中，以提高功率因数。PLC在工业自动化中的大规模应用，适应性强，实现简单，经济实惠，是选择其作为开关控制器的合理选择。在不同的负载条件下，功率因数有显著的提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES)

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