Study Of High-Efficiency Induction Motor Based On Simulation

Compared to developed countries, the utilization rate of energy still has a larger gap in China. In order to improve the energy utilization efficiency and realize energy saving and emission reduction, an important way is to vigorously promote the application of high-efficiency induction motors, which can not only save electric energy, reduce the enterprise production cost, but also can reduce carbon emissions to produce good social benefits. The research of high efficiency induction motors is an urgent task.The point of this paper is how to optimize the electromagnetic design of induction motors. That is how to reduce the harmonic in induction motors in order to lower the losses and improve the efficiency. Firstly, the research status of induction motors in domestic and foreign is introduced briefly. Then, the principles and calculation methods of various losses are discussed. Then, three methods are proposed to optimize the induction motors. Finally, the summery and prospect is put forward.The method in Third Chapter is mainly used to optimize low-efficiency induction motors(Y-180L-4as sample). According to the principle of low harmonic windings, the forms and the numbers of turns of windings are optimized to reduce the harmonic content in the air-gap, so as to reduce loss and improve efficiency. In Fourth Chapter, by comparing the mechanical parameters and operation performances between inefficient induction motors (with Y-180L-4as the prototype) and high performance induction motors (with Y2-180L-4as the prototype), the influence of various mechanical parameters on the losses is analyzed and the main factors is the rotor slot type and the number of rotor slots to influence motor operation performance. Fifth Chapter is mainly to optimize the design of the rotor slots in induction motors (with Y2-180L-4as the prototype) in order to reduce the tooth harmonic content. The rotor slots are tilted along the radial to make the motor magnetic circuit relatively uniform, while avoiding the rotor slot skew and reducing the process requirements.