Induction motor provided with cast copper rotor

Abstract

The invention relates to an induction motor provided with a cast copper rotor. The induction motor comprises a stator, a rotor and a rotating shaft, wherein the rotor is located in the stator, an air gap is reserved between the stator and the rotor, the stator comprises stator teeth, stator slots, armature windings and a stator yoke, and the rotor comprises a rotor iron core, guide bars and an end ring. The induction motor is innovatively characterized in that the armature windings adopt a single and double layer winding, upper and lower conductors of the same phase in a short-pitch winding are combined to form a single-layer winding, upper and lower conductors of different phases form a double-layer winding, end parts of the conductors are connected together in a shape of end parts of the concentric double-layer winding, and the single and double layer winding is formed; each guide bar of the rotor adopts a novel concentric arc structure with wide top and narrow bottom, and upper and lower bottoms of each guide bar take the axis of a rotating shaft as circle centers. The starting performance can be improved, copper for stator winding and rotor mouse cages is saved, the motor temperature rise is reduced, and the motor efficiency is improved.

Description

technical field [0001] The invention relates to an induction motor, in particular to a cast copper rotor induction motor used in electric vehicles. Background technique [0002] With the rapid development of the economy, my country's automobile sales show a sustained and rapid growth. Since 2009, my country has continued to become the world's largest automobile production and sales country. As of 2014, the number of fuel vehicles in my country has exceeded 250 million, of which 140 million are automobiles. At the same time, the continuous growth of car ownership has brought a huge burden to the environment. As the use of automobiles continues to grow, the pollution caused by its exhaust emissions directly leads to the deterioration of the environment. This year, more than half of the cities in the country have been shrouded in smog for a long time. The air quality in some cities has reached the level of serious pollution, and the greenhouse effect has intensified. Theref...

AI Technical Summary

Problems solved by technology

[0007] However, as the driving motor of electric vehicles, compared with other types of motors, the traditional cast aluminum rotor induction motor also has the disadvantages of lower power density and lower efficiency. In order to overcome these disadvantages, research and development of higher power density and higher efficiency The induction motor imperative

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