Comparative study for estimation of load and performance of electric motors for energy audit

Revista Brasileira de Engenharia Agrícola e Ambiental

Soares, Antônio Alves¹  Oliveira, Rubens Alves de¹  Campana, Saulo²  Oliveira Filho, Delly¹ 

[1] UFV;Universidade Federal de Viçosa, Viçosa

关键词: energy audit;    performance;    load and electric motors    INTRODUÇÃO Atualmente;    o fornecimento de energia elétrica brasileiro no horário de ponta;    é deficitário;    haja vista que a margem de segurança de oferta de energia é 50% inferior à observada no restante do mundo;   

DOI  :  10.1590/S1415-43662000000200018

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

This article investigates the precision of methods for the load and efficiency estimate of electric motors. The error was determined by the estimate of load and efficiency of electric motors using the arithmetic and geometric average of the currents and the arithmetic average of the power factor in each phase. The importance was shown of the determination of the decrease in the electric motors' performance due to the variation of feeder tension, when the motors' load and performance evaluation in the load condition is performed. It was verified that the estimate of the electric motors' load and performance by the arithmetic average power factor, presented results with larger errors, that is, 24.5% and 2%, respectively. These estimates by the arithmetic and geometric average current method presented similar results to each other and with percentage errors significantly inferior to the previous results, that is, 6.2% and 1%, respectively.

【 授权许可】

CC BY-NC