Magnetic field modulating type concentric magnetic gear transmission device in Halbach magnet structure

Abstract

The invention provides a magnetic field modulating type concentric magnetic gear transmission device in a Halbach magnet structure, which comprises a shell, an outer rotor and an inner rotor, whereinthe outer rotor and the inner rotor are installed in an inner cavity of the shell and are in a cantilever type; the inner rotor comprises an inner rotor iron core and a permanent magnet, which are installed on an output shaft of the inner rotor; the outer rotor comprises an outer rotor iron core and a permanent magnet, which are installed on an output shaft of the outer rotor; a magnetic modulation ring is arranged between the permanent magnet of the inner rotor and the permanent magnet of the outer rotor; and the magnetic modulation ring comprises an iron core block and is fixed on an end plate of the shell. The magnetic gear transmission device comprises two layers of air gaps, wherein an inner-layer air gap is formed between the inner rotor and the magnetic modulation ring, and an outer-layer air gap is formed between the outer rotor and the magnetic modulation ring. The magnet structure uses a Halbach array to replace the conventional radial structure, thereby improving the magnetic density distribution of the air gaps of the magnetic gear transmission device. Because the magnetic density of the air gaps approaches to sinusoidal distribution, the detent torque of the magnetic gear transmission device in the structure is greatly reduced, thereby decreasing the vibration and noise of the magnetic gear transmission device and improving the running efficiency.

Description

technical field [0001] The invention relates to a magnetic gear transmission device, in particular to a Halbach magnet structure magnetic field modulation type concentric magnetic gear transmission device. Background technique [0002] Compared with mechanical gear transmission, magnetic gear transmission has the following advantages: 1. Only bearing friction loss and core loss, low energy loss and high efficiency; 2. High torque density per unit volume, which is 10 times that of ordinary motors ;3. Since there is no mechanical contact, there is no mechanical wear, no lubrication, high reliability and long life; 4. There is no vibration noise generated during mechanical contact; 5. The reducer will not be damaged when overloaded, and the reducer will not be damaged when overloaded Cut off the transmission relationship at any time, not only the reducer itself will not be damaged, but also the prime mover can be protected. [0003] In the existing magnetic gear transmission d...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the air-gap magnetic density waveform of the existing new magnetic gear transmission is not sinusoidal, and to provide a Halbach magnet structure magnetic field modulation type magnetic gear transmission. The positioning torque of the magnetic gear transmission with this structure reduces the vibration and noise of the magnetic gear transmission and improves the operating efficiency

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