Novel axial coreless motor rotor structure and heat dissipation method thereof

Abstract

The invention discloses a novel axial coreless motor rotor structure and a heat dissipation method thereof. The structure comprises a plurality of permanent magnets annularly distributed on back iron along the radial direction, an air gap is arranged between two adjacent permanent magnets, a U-shaped iron pole is inserted in the air gap between every two adjacent permanent magnets, and air slots formed by the U-shaped parts of all the U-shaped iron poles face the back iron. The U-shaped iron poles are filled between every two adjacent permanent magnets in the rotor disc of the motor to improve the air gap flux density waveform of the axial coreless motor, so that the distortion rate of the air gap flux density waveform of the motor is reduced, the waveform of counter electromotive force of the motor is also improved, and the distortion rate is reduced. Meanwhile, the composite phase-change material is filled in the air slots added with the U-shaped iron poles, so heat generated by the motor rotor can be absorbed, the temperature of the motor rotor is reduced, and the demagnetization risk of the permanent magnets is reduced.

Description

technical field [0001] The invention relates to the technical field of electric motors, and more specifically, relates to a novel axial ironless electric motor rotor structure and a heat dissipation method thereof. Background technique [0002] Axial ironless motors Since the motor stator adopts ironless technology, the motor stator is composed of one or several PCB boards. Due to the use of PCB boards, compared with iron core motors, the overall weight of ironless motors is lighter. , and saves the complicated winding process. However, there are a series of problems when using a PCB board as a motor stator. For example, since the stator of an axial ironless motor has no iron core, the air gap length is much larger than that of an ironcore motor. The longer air gap length of the motor leads to more magnetic flux leakage of the axial ironless motor, and there are many harmonics in the air gap flux density waveform, which leads to an increase in the distortion rate of the ai...

AI Technical Summary

Problems solved by technology

The longer air gap length of the motor leads to more magnetic flux leakage of the axial ironless motor, and there are many harmonics in the air gap flux density waveform, which leads to an increase in the distortion rate of the air gap flux density waveform

The increase of the distortion rate of the air-gap magnetic flux density waveform leads to an increase in the distortion rate of the back electromotive force waveform of the motor, the deterioration of the output power quality of the motor, and the loss of the motor increases and the efficiency decreases

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