Ultra-high-efficiency 3000-watt dipolar three-phase asynchronous motor

Abstract

An ultra-high-efficiency 3000-watt dipolar three-phase asynchronous motor comprises a stator and a rotor. The external diameter and the internal diameter of each of the stator and the rotor, the core length and the number, the shape and the size of punching sheet slots are optimized and reasonably designed to enable loss of a stator winding, a rotor winding and a core to be greatly reduced, and with the 3000-watt output power, compared with the existing like products, the ultra-high-efficiency 3000-watt dipolar three-phase asynchronous motor has the advantages that rotational speed is increased from 2868r / min to 2920r / min; total electric energy loss is decreased from 619.2w to 384.1w, and energy is saved by 37.97%; energy conversion efficiency is greatly increased from 82.9% to 88.7%, is increased by 5.8% and is 1.6% higher than the highest international grade standard of 87.1%; and since a central line of a stator cramp slot is designed to penetrate through the middles of two of the stator punching sheet slots, radial electromagnetic force waves in air gaps are weakened, electromagnetic vibration is reduced, and electromagnetic noise is reduced.

Description

technical field [0001] The invention relates to a motor, in particular to a super-efficient 3000-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] At present, most of the 3000 watt 2-pole three-phase asynchronous motors used in the market are of IE1 level, and their energy conversion efficiency is 81.5%. Meet the current needs of developing a low-carbon economy

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