Self-cooled axial flux motor

Abstract

The invention relates to the field of motors, in particular to a self-cooling axial magnetic flux motor which comprises a stator, a rotor, a rotating shaft and a machine shell, the machine shell is provided with a cavity used for containing the stator and the rotor, the rotating shaft sequentially penetrates through the stator and the rotor and then extends towards the two ends, the rotor comprises a rotor back plate, a magnetic conductive plate and magnetic steel, the rotor back plate is an open shell, and the magnetic steel is arranged in the cavity. The magnetic conductive plate is integrally in a circular ring shape, the magnetic conductive plate is arranged in a cavity of the rotor back plate, the magnetic steels are attached to the surface of one side, close to an opening of the rotor back plate, of the magnetic conductive plate, and the magnetic steels are uniformly arranged at intervals in the circumferential direction of the magnetic conductive plate. More than two fan blades are arranged on the outer side face of the bottom of the rotor back plate, the multiple fan blades are radially distributed with the geometric center of the rotor back plate as the center, the bottom space of the rotor back plate of the disc type motor is reasonably utilized, the fan and the rotor back plate are integrated, additional fans are avoided, the number of parts is reduced, and meanwhile the space is saved.

Description

technical field [0001] The invention relates to the field of motors, in particular to a self-cooling axial flux motor. Background technique [0002] The disc motor is an axial permanent magnet motor. The rotor of this motor is mainly composed of a rotor back plate, a magnetic conductive plate and a magnetic steel, wherein the magnetic steel and the magnetic conductive plate are fixed on the rotor back plate. The rotor maintains a high-speed operation for a long time during operation, and friction will occur between the rotor and the bearing, rotating shaft, oil seal, etc., and these mechanical frictions will generate a very large amount of heat. In addition, the magnetic steel of the rotor will generate eddy current loss, and the magnetic conductive plate will also generate iron loss. These losses will be converted into heat and accumulated in the rotor, causing the local heat of the rotor to be too high. If the temperature of the rotor is too high, the magnetic properties ...

AI Technical Summary

Problems solved by technology

In addition, the magnetic steel of the rotor will produce eddy current loss, and the magnetic plate will also produce iron loss. These losses will be converted into heat and accumulate in the rotor, resulting in excessive local heat of the rotor.

If the temperature of the rotor is too high, the magnetic performance of the magnetic steel will be greatly reduced, and in severe cases, the magnetic steel will be demagnetized

In addition, too high temperature will also cause deformation of parts on the rotor and unreliable fixation.

If the heat is not transferred to the outside of the motor in time, when the heat of the motor reaches a certain level, insulation breakdown will easily occur, causing the motor to burn out

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