Facilitation for Load Based Energy Savings in Three-phase Squirrel Cage Induction Motors

摘要

Electrical motors use a significant amount of electricity. Increasing the motor efficiency has an impact on the reduction of energy consumption. There have been efforts to increase motor efficiency over the past decade that have led to the development of premium efficiency motors. The motor efficiency decreases under conditions of low load factor. It is important to match the motor power with that required for the application that it serves, as this will increase operational efficiency. Accurate load determination methods, such as input power measurement, are time-consuming and have safety hazards that need to be mitigated. The development of a method that aids the sizing of electric motors that is simple to use, economical, safe, and accurate, is important. This article reports on data collected during fifteen energy assessments conducted at a variety of manufacturing facilities using the motor load monitoring method as well as the stroboscope method. An analysis of the data was conducted to determine the relationship that exists between the motor load factors determined by the slip method and the input power measurement method so that the prediction of accurate load factors can be made based on the results obtained by the slip method. The model is built and validated based on statistical principles.