Ventilated electric motor

Abstract

The invention belongs to the technical field of electric equipment, and particularly relates to a ventilated electric motor. The ventilated electric motor comprises a base, a stator and a rotor. A front end cover and a rear end cover are arranged at two ends of the base respectively. A plurality of first air inlets are arranged at the position, close to the front end cover, of the base. A positioning shaft sleeve is arranged in the rear end cover. An air outlet is arranged at the center of the rear end cover. One end of the rotor penetrates the positioning shaft sleeve to fasten a fan coaxially. The fan is located in the air outlet. An air duct is arranged between the stator and each of the base, the front end cover, the rear end cover and the rotor. A connection component is arranged on the inner side of the base. The outer wall of the stator is in close touch connection with the connection component. The ventilated electric motor has the advantages that structures of the base, the stator and the rotor are improved, and the air ducts are reversed in the electric motor, around the stator and around the rotor, so that air cooling of the surfaces of the rotor and the stator is realized, and cooling effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of electric equipment, and in particular relates to a ventilated motor. Background technique [0002] The motor is an electric device that converts electrical energy into mechanical energy, but during use, the temperature of the motor will increase for the following reasons: [0003] 1. The coil has resistance, and the current flows through the power loss; [0004] 2. The magnetic field of the iron core has a "hysteresis loop", and a part of the magnetic energy converted from electric energy continues to be converted into heat energy; [0005] 3. There are eddy currents in the iron core, and a part of the magnetic energy transformed by electric energy becomes electric current and then heat energy; [0006] 4. There is friction between the mechanical rotating parts, and part of the kinetic energy converted from electric energy continues to be converted into heat energy; [0007] The long-term heating of th...

AI Technical Summary

Problems solved by technology

Since the windshield is a thin-walled part, when the auxiliary motor rotates to drive the fan to rotate, the thin-walled part vibrates, which will not only generate noise but also cause vibration of the main motor. How to design a self-ventilated motor structure to overcome the existence of this structure? The problem is a technical problem that those skilled in the art need to solve urgently

[0009] The disadvantage of the above structure is that this structure improves the structure of the brushed motor to realize the temperature adjustment of the brush, but the brushed motor has the defects of high noise and high power consumption, and is gradually replaced by the brushless motor; among them, The rotation speed of the ultra-high-speed permanent magnet motor is as high as tens of thousands or even hundreds of thousands of revolutions per minute, and the air friction loss and high-frequency eddy current loss of the rotor are much larger than those of ordinary motors

The disadvantage of the above two structures is that only the space between the stator and the rotor is ventilated and cooled, and the effect is not increased.

Images