Superefficient 4000W two-pole three-phase asynchronous motor

Abstract

A superefficient 4000W two-pole three-phase asynchronous motor comprises a stator and a rotator. Outer diameter, inner diameter and iron core length of the stator and the rotator and amount, groove shape and size of stamping grooves are optimally and rationally designed, so that stator winding loss, rotator winding loss and iron core loss are greatly lowered. On the premise of a same output power as 4000W, compared with similar products, the superefficient 4000W two-pole three-phase asynchronous motor has the advantages that rotation speed is increased by 49r / min from 2890r / min to 2939r / min, total power loss quantity is decreased from 726.0W to 464.7W, 35.99% of energy is saved, and energy conversion efficiency is increased by 5.0% from 84.6% to 89.6% and 1.5% higher than the highest international grade standard 88.1%, so that the energy conversion efficiency is greatly improved. In addition, the centerline of cramp grooves of the stator is designed as penetrating through the middle of two grooves of the stamping grooves of the stator, so that radial electromagnetic waves in air gaps are weakened, electromagnetic vibration is reduced, and electromagnetic noise is lowered.

Description

technical field [0001] The invention relates to a motor, in particular to a super-efficient 4000-watt 2-pole three-phase asynchronous motor. Background technique [0002] The motor has a history of nearly 200 years since its inception, and the three-phase asynchronous motor has a history of more than 100 years. At present, it is widely used in various industries such as industry, agriculture, forestry, animal husbandry, and various fields of life. The necessary equipment in industrial production and people's life, but at the same time it has also become the electrical equipment that consumes the most energy in production and life, so how to make the motor energy-saving and environmentally friendly has become an important issue in front of people. China is the largest power consumer in Asia, and is also the developing country with the most serious power shortage in the world. Since 1992, China's annual power generation and power consumption have ranked second in the world. Mo...

AI Technical Summary

Problems solved by technology

[0003] At present, the Y2 series three-phase asynchronous motor is commonly used in the Chinese market. This motor includes two parts: the stator and the rotor. The stator core is made of stator punches made of silicon steel sheets. Stator windings are embedded in the slots, and rotor shafts are fitted with rotor poles made of silicon steel sheets laminated by rotor punches. There are closed loops formed by rotor windings on the rotor poles; when the stator is fed with current, the generated magnetic lines of force pass through The rotor, and induce current in it, the current in the short-circuit ring hinders the change of magnetic flux, resulting in a phase difference between the magnetic flux generated by the short-circuit ring part and the non-short-circuit ring part, thus forming a rotating magnetic field; There is relative motion between the magnetic field and the induced electromotive force and current, and the rotating magnetic field and the rotor have a relative speed, and interact with the magnetic field to generate electromagnetic torque, which makes the rotor rotate and realizes the conversion of electrical energy and mechanical energy; under full load conditions Under normal circumstances, the efficiency of the motor is generally high, usually around 80%; however, once the load drops, the efficiency of the motor will drop significantly, because the selection of the motor is based on the power required by the maximum possible load and the worst working condition. Certainly, the load rate of most motors is 50% to 60% in most of the running time, so the efficiency in actual operation is relatively low

[0004] Most of the 4,000-watt 2-pole three-phase asynchronous motors currently on the market are IE1 grades, and their energy conversion efficiency is 83.1%, and there are also a small number of IE2 grades, whose energy conversion efficiency has risen to 85.8%, but their energy-saving effect is still not enough. Meet the current needs of developing a low-carbon economy

Images