Minimização de Sobretensão em Motores de Indução empregando Drives PWM com cabos longos (Overvoltage Minimization in Induction Motors employing Long Cable PWM Drives)

Paulo André Santos (paulo.andre@portal.sp.senai.br)1, José Alberto Torrico Altuna (jose.torrico@ufabc.edu.br)2, Ivan Roberto Santana Casella (ivan.casella@ufabc.edu.br)2, Alfeu Joãozinho Sguarezi Filho (alfeu.sguarezi@ufabc.edu.br)2, Carlos Eduardo Capovilla (carlos.capovilla@ufabc.edu.br)2


1Serviço Nacional de Aprendizagem Industrial
2Universidade Federal do ABC

This paper appears in: Revista IEEE América Latina

Publication Date: Sept. 2015
Volume: 13,   Issue: 9 
ISSN: 1548-0992


Abstract:
The employment of PWM drives in induction motors control has been widely used in industry. However, in some applications in hazardous areas, such as drilling, the PWM drive cannot be physically close to the motor, being necessary the use of long cable drives. This fact leads to the generation of overvoltage peaks on the induction motor terminals, which can cause interference in the speed control, reduction of equipment lifetime, or even, permanent damages. In this context, this work presents alternatives to minimize the overvoltage effect based on the use of transformers and analyzes the performance of the speed control of each proposed technique.

Index Terms:
PWM Drives, Induction Motor, Scalar V/f Control, Long Cable, Overvoltage   


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