The modified air gap torque method to determine the efficiency coefficient of squirrelcage induction motor was presented. The results of a continuation of work on the application of the method to estimate the efficiency coefficient also are shown.
The verification of the proposed method on a few selected motors of small power are presented in this article
DETERMINATION OF THE EFFICIENCY COEFFICIENT OF A SQUIRREL-CAGE MOTOR USING THE MODIFIED AGT METHOD
This article presents a modified Air Gap Torque (AGT) method for determining the efficiency coefficient of a squirrel-cage induction motor. The results of research, which are a continuation of work on the application of the AGT method for estimating the efficiency coefficient, are also presented. The article verifies the proposed method on several selected low-power motors.
1. INTRODUCTION
Squirrel-cage induction motors are widely used in various industrial applications. These engines usually operate below nominal values because they are oversized in relation to the power-driven machinery and equipment. In many cases, these motors are powered by inverters to change the rotor speed. Under such conditions, the motor efficiency varies as a function of not only the load but also the supply voltage and frequency. Economic considerations related to the lowering of energy consumption in industrial processes make it expedient to act in the direction of monitoring the engine operating efficiency ratio, and (…)
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