Application Research of Small and Medium-Sized Three-Phase Asynchronous Motor Energy Efficiency Testing System

The promotion of energy-efficient motor is a trend in the development of modern industry, with the improvement of motor efficiency requirements, the corresponding energy efficiency testing technology must continue to progress. Comparing with traditional analog or digital instrument manual detection methods of energy efficiency, GB/T 1032 test method to a series of type tests on the motor being tested to determine the efficiency of the loss and then the motor efficiency is calculated based on the application of the technology energy feedback energy-saving efficiency test system as a platform. The automatic test system uses a DC motor as measured motor load, at the same time as a generator. DC motor will issue of electric power gave back to the power grid, realize the assessment process of high efficiency energy saving. Experiments show that, the maximum efficiency of the motor about in the vicinity of 70% rated power, active power from the grid absorption system accounted for only about 20% of the tested motor capacity, thereby saving electric energy.