Efficiency Measurements in Induction Motors: Comparison of Standards

PROJECT TITLE :

Efficiency Measurements in Induction Motors: Comparison of Standards

ABSTRACT:

Recently, given the requirement to cut back the emission of greenhouse result gases and limiting the steady increase in energy demand, were have proposed new standards of potency levels of electrical motors. From them are outlined potency categories, that verify the boundaries for therefore known as Normal Efficiency Motors, High Efficiency, Efficiency Premium, etc. Most countries, therefore, have established legal restrictions on the utilization of motors with low potency. A small error in the motor efficiency measurement might result in an incorrect categorization. During this sense recently have been revised standards that establish testing procedures. Each one, in turn, provides different alternatives more or less accurate to estimate the motor potency based mostly on the tools that are included (dynamometer torque sensor, windings temperature measurement, etc.). In this paper a comparison of a number of the foremost commonly used standards for the motor potency measurement is presented. The comparison is made in reference to the therefore-known as direct method, where the input and output power of a motor is directly measured with a strict management of ambient (laboratory), engine temperature and feeding conditions. The comparisons enable conclusions concerning the probable errors in the application of every normal.

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