Single-layer short isometric winding of 48-slot 4-pole three-phase asynchronous motor

Abstract

The invention relates to a single-layer short isometric winding of a 48-slot 4-pole three-phase asynchronous motor, belongs to the field of the structural design of motors, and aims at providing the single-layer short isometric winding which is capable of improving motor efficiency and saving wires, and is convenient to wind and simple in embedding the wires. All the pitches, shapes and sizes of coils in the single-layer short isometric winding of the 48-slot 4-pole three-phase asynchronous motor are the same. The pitches of the coils are 9, and the wires are embedded on the single-layer short isometric winding in an overlapping method, and the single-layer short isometric winding is connected in a salient pole connection method and is suitable for manufacturing and maintenance of the three-phase asynchronous motor provided with a stator which is provided with 48 slots and 4 poles. According to the single-layer short isometric winding of the 48-slot 4-pole three-phase asynchronous motor, the length of the end portion of the winding is shortened through changing of the pitches of the coils so as to shorten the total length of the coils and reduce stator resistance, and consequently copper consumption of the stator is reduced. Meanwhile, fifth subharmonics and seventh subharmonics severely affected in a magnetic field of the motor are significantly reduced, the phenomena of magnetic leakage are reduced, and consequently stray losses are lessened. Moreover, efficiency and performance of the motor are effectively improved, and compared with an existing single-layer winding, the wires are saved by about 15% and production efficiency is improved by 30%.

Description

technical field [0001] The invention belongs to the field of motor structure design, and mainly relates to a three-phase asynchronous motor, especially a winding of a 48-slot, four-pole three-phase asynchronous motor. Background technique [0002] According to reports, as a general industrial equipment, electric motors consume nearly 60% of my country's electricity resources every year. With the enhancement of people's awareness of energy saving and environmental protection, countries around the world have successively issued energy efficiency standards. my country also enforced the GB18613-2012 "Energy Efficiency Limits and Energy Efficiency Grades of Small and Medium-Sized Three-phase Asynchronous Motors" on September 1, 2012. Therefore, The development and development of high-efficiency motors is an inevitable trend of social development, and it is also the need for enterprises to participate in market competition. Three-phase asynchronous motors are widely used in variou...

AI Technical Summary

Problems solved by technology

The single-layer stator winding types of the existing 48-slot 4-pole three-phase asynchronous motor include single-layer stacked type and single-layer concentric type, but these two winding types are difficult to reduce stator copper loss and stray loss

Images