A magnetic gear device with slotted iron yoke

Abstract

The invention discloses a magnetic yoke device with a slotted iron yoke. The magnetic yoke device includes, from inside to outside, an inner rotor, a magnetic flux adjusting ring and an outer rotor; air gaps are formed between the inner rotor and the magnetic flux adjusting ring, and between the magnetic flux adjusting ring and the outer rotor; the magnetization direction of an inner rotor permanent magnet is radial magnetization; an outer rotor permanent magnet is composed of a plurality of first fan rings, and an outer rotor yoke is composed of a plurality of second fan rings, wherein a plurality of the first fan ring and the plurality of second fan rings are evenly staggered; the outer rotor permanent magnet is of a Spoke tangential polarization structure, and the magnetization direction of the outer rotor permanent magnet is tangential magnetization; the inner rotor permanent magnet and the outer rotor permanent magnet form a radial-Spoke composite polarization magnetic gear structure; the magnetic flux ring is used to modulate the magnetic pole pairs of the inner rotor permanent magnet and the outer rotor permanent magnet; the outer sides of the second fan rings have slots, and the slots do not affect the distribution of the magnetic lines; and the inner rotor permanent magnet is embedded in an outer surface of the inner rotor yoke. The magnetic yoke device can increase the high torque density, and can reduce the mass of the magnetic gear.

Description

technical field [0001] The invention belongs to the field of low-speed high-torque transmission technology, and more specifically relates to a magnetic gear device with slotted iron yokes. Background technique [0002] Mechanical gears use the meshing between adjacent gears to transmit power, which inevitably produces problems such as friction, lubrication, noise, and maintenance, while magnetic gears transmit torque through permanent magnets on non-contact shafts, which effectively avoids the shortcomings of mechanical gears. wide attention of foreign scholars. [0003] Early magnetic gears were developed on the basis of mechanical gears. Unlike mechanical gears, permanent magnets replaced the teeth of mechanical gears, but only a few adjacent permanent magnets participated in torque transmission during rotation. Permanent magnets The utilization rate of the magnetic gear is very low; and, affected by the properties of the permanent magnet material, the torque density of t...

AI Technical Summary

Problems solved by technology

However, there are also problems such as large torque fluctuations, easy fall off of permanent magnets, large amount of permanent magnets, and high requirements for processing technology.

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