Magnetic transmission eccentric gear pair with less pole difference magnetic field induction in radial magnetic field

Abstract

A less-pole-difference magnetic field induction type magnet transmission eccentric gear pair of a radial magnetic field can be widely used for industrial transmission fields such as wind power generation, electric automobiles and vessel driving. The less-pole-difference magnetic field induction type magnet transmission eccentric gear pair is characterized in that 2p1 stators of a stator permanent magnet 1 are distributed in an inner hole of a casing 6, Z2 planet rotors of a mouse cage winding conductor 2 are distributed in an uniform distribution groove of an outer periphery of a planet rotor core 5 to form a pair of magnet transmission gear pairs of the radial magnetic field, the difference between the 2p1 and the Z2 is small, two less-pole-difference magnet gear pairs are connected into an exocentric structure through an eccentric input shaft 3 with a second bearing 12 and a third bearing 13, the eccentric input shaft 3 drives the planet rotor to rotate around an axis at the rotating speed of n1, the Z2 mouse cage winding conductor 2 and an air gap permanent magnetic field have relative movement, current i2 is induced in the conductor, spin moment is produced under effects of the air gap magnetic field, the planet rotor is driven to reversely rotate around the self axis at the rotating speed of n2, and rotation is output through a hole-pin type output structure.

Description

technical field [0001] The present invention is an eccentric gear pair of a radial magnetic field magnetic transmission with less extreme difference magnetic field induction, and 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 conve...

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.

[0005] In the near future, the inventors of this case also proposed a new type of radial magnetic field with less pole difference magnetic transmission eccentric disc gear pair (201110355864.1 and 201120444409.4). This magnetic gear pair uses two different poles on the two transmission wheel pairs The permanent magnetic field of several numbers interacts and couples with each other to achieve the purpose of torque transmission and variable speed transmission. In fact, this is a concept of synchronous drive variable speed similar to the magnetic field of a synchronous motor. Up to now, no one at home and abroad has proposed the use of AC The induction principle of asynchronous motor is used to improve the working principle and specific application structure of the eccentric gear pair in magnetic transmission with less extreme difference, and the invention of such technology and structure has important practical significance for reducing the consumption of expensive rare earth permanent magnet materials

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