Low voltage high-power threephase asynchronous motor

Abstract

The invention relates to a low voltage high-power three-phase asynchronous motor. According to the technical scheme of the invention, a front end cover and a back end cover are installed at both ends of a motor base, a stator is installed in the motor base, and is fixed on the front end cover and the back end cover, the stator is connected with a junction box, a rotor is installed in the motor base, the front end and the back end of the rotor are installed on the front end cover and the back end cover by a front bearing and a back bearing, the front bearing and the back bearing are fixed by an external bearing cover, an internal bearing cover and a bearing retainer ring, an external fan is installed at the tail end of the rotor and is fixed by the bearing retainer ring, an external fan shield is fixed on the back end cover, and a key is installed in a key slot at the front of the rotor. The invention has the characteristics that the stator punching is made of silicon steel, a stator winding is made by adopting modified high strength polyester paint to coat circular copper wires in double-layer lap wound embedding mode, and the end part of the stator winding is coated by epoxy glass fiber tapes. The invention has reasonable stator winding, good safety, skillful complete motor structure, good heat dispersion, low running noise, high intensity and safe and smooth operation.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a low-voltage high-power three-phase asynchronous motor. Background technique [0002] Y2 series (IP54) three-phase asynchronous motors (center height H63~355) have unique appearance and obvious energy saving characteristics. With the internationalization of motor manufacturing, the development and production of low-voltage high-power motors in my country has gradually matured, and they play an important role in many industrial fields such as mining, petroleum, chemical industry, electric power, and water supply and drainage. Such an electric motor needs to change the power that can only be realized under high voltage into that it can also be realized under low voltage. In the prior art, this type of motor has the following defects: (1) There is no fan inside the motor, and a single air passage structure is adopted, so the internal heat dissipation capability of the m...

AI Technical Summary

Problems solved by technology

In the prior art, this type of motor has the following defects: (1) There is no fan inside the motor, and a single air passage structure is adopted, so the internal heat dissipation capability of the motor is poor, the temperature rises, and the insulation life is short; (2) the bearing structure is single, and high operating noise

Therefore, the use of this type of low-voltage high-power three-phase asynchronous motor is restricted

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