Little pole difference magnetic field coupling type magnetism transmission eccentricity gear pair of novel radial direction magnetic field

Abstract

Disclosed is a little pole difference magnetic field coupling type magnetism transmission eccentricity gear pair of a novel radial direction magnetic field. The little pole difference magnetic field coupling type magnetism transmission eccentricity gear pair of the novel radial direction magnetic field can be applied widely in the field of industry transmissions of wind power generation, electric automobile, vessel driving and the like. The little pole difference magnetic field coupling type magnetism transmission eccentricity gear pair of the novel radial direction magnetic field is characterized in that a stator with a 2p1 stator permanent magnet 1 are distributed in the inner hole of a machine shell 6. A magnetism transmission gear pairs are formed by planet rotors of 2p2 planet rotor permanent magnet 2 are distributed on the excircle of a planet rotor iron core5. A number difference between the pole number 2p1 and 1p2 is small. The permanent magnets on the two magnetic gear pairs penetrate through an air gap magnetic field coupling of the radial direction eccentricity, and are connected to an eccentricity structure by the little pole difference two magnetic gear pairs. A second bearing 12 and a third bearing 13 are installed on an eccentricity input shaft 3. The planet rotor iron core 5 is driven by the eccentricity input shaft 3 to revolve in autogiration around the axis. A low speed autogiration of the planet rotor is output through a pin hole type output structure.

Description

technical field [0001] The present invention is a magnetically driven eccentric gear pair with a small pole difference magnetic field coupling type radial magnetic field. It is a variable speed transmission device that utilizes magnetic gear transmission technology to realize mutual conversion between high-speed low-torque mechanical energy and low-speed high-torque mechanical energy. It directly replaces the conventional mechanical gear transmission transmission system, and is widely used in wind power generation, hydropower generation, electric vehicles, ship drive and other industrial transmission fields that require direct drive. Background technique [0002] In many transmission fields of industrial applications, it is often necessary to realize the mutual conversion of low-speed, high-torque mechanical energy and high-speed, low-torque mechanical energy. High-speed mechanical kinetic energy for power generation, electric vehicles and submarine drives need to convert th...

AI Technical Summary

Problems solved by technology

However, there are two fatal deficiencies in this magnetic gear designed based on the magnetic field modulation technology from the theoretical principle to the structural scheme: first, from a theoretical point of view, the number of poles (teeth) of the magnetic permeable grid core that plays the role of magnetic field modulation must be Satisfy the constraints, resulting in less than half of the permanent magnets of the magnetic gear being in the working state of mutual magnetic field coupling at any time during the transmission of the magnetic gear, and more than half of the permanent magnet poles are in the idle non-coupling state, that is, the utilization of rare earth permanent magnets The ratio is theoretically lower than 50%. Second, from a structural point of view, adding a magnetic grid core will inevitably make the magnetic gear pair have two air gaps, which will inevitably consume a large amount of magnetomotive force of the rare earth permanent magnet. According to the rare earth magnet According to the demagnetization characteristics of the material, if the thickness of the magnetic pole is not thickened, the magnetic flux of the permanent magnet in the coupled working state will inevitably be reduced, thereby affecting the transmitted torque.

These two major drawbacks lead to a relatively large amount of expensive rare earth materials consumed by magnetic gears based on magnetic field modulation technology

Images