Insulation Life Span of Low-Voltage Electric Motors—A Survey

Vanessa Neves Höpner and Volmir Eugênio Wilhelm
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Vanessa Neves Höpner: Instituto Federal Catarinense, Araquari 89245-000, Santa Catarina, Brazil
Volmir Eugênio Wilhelm: Programa de Pós-Graduação em Métodos Numéricos em Engenharia, Centro Politécnico, Universidade Federal do Paraná, Curitiba 81530-900, Paraná, Brazil

Energies, 2021, vol. 14, issue 6, 1-32

Abstract: The use of static frequency converters, which have a high switching frequency, generates voltage pulses with a high rate of change over time. In combination with cable and motor impedance, this generates repetitive overvoltage at the motor terminals, influencing the occurrence of partial discharges between conductors, causing degradation of the insulation of electric motors. Understanding the effects resulting from the frequency converter–electric motor interaction is essential for developing and implementing insulation systems with characteristics that support the most diverse applications, have an operating life under economically viable conditions, and promote energy efficiency. With this objective, a search was carried out in three recognized databases. Duplicate articles were eliminated, resulting in 1069 articles, which were systematically categorized and reviewed, resulting in 481 articles discussing the causes of degradation in the insulation of electric motors powered by frequency converters. A bibliographic portfolio was built and evaluated, with 230 articles that present results on the factors that can be used in estimating the life span of electric motor insulation. In this structure, the historical evolution of the collected information, the authors who conducted the most research on the theme, and the relevance of the knowledge presented in the works were considered.

Keywords: electric motor insulation; partial discharge; dielectric breakdown (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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