Magnetic gear device with improved transmission stability

Abstract

The invention discloses a magnetic gear device with improved transmission stability. The magnetic gear device comprises an inner rotor, a magnetism-adjusting ring and an outer stator which are arranged coaxially from inside to outside, wherein an inner-layer air gap exists between the inner stator and the magnetism-adjusting ring; an outer-layer air gap exists between the magnetism-adjusting ringand the outer stator; the inner stator comprises an inner yoke and an inner permanent magnet; the inner permanent magnet is attached to the surface of the inner yoke; the outer stator comprises an outer permanent magnet, a coil and an external yoke; the outer permanent magnet comprises a plurality of same permanent magnets; the plurality of permanent magnets constructing the outer permanent magnetare uniformly attached to an inner surface of the outer yoke at equal intervals in a non-eccentrical manner; a slot is formed in a gap between every two permanent magnets on an inner side of the outer yoke; the coil is arranged in the slots to form an exciting winding; both the inner permanent magnet and the outer permanent magnet are magnetized in a radial direction; and during working, the inner rotor and the magnetism-regulating ring rotate along the same direction, the outer stator is fixed, and the coil is electrified. Through adoption of the magnetic gear device, the transmission stability and torque density of the magnetic gear device can be improved, and the device mass is lowered.

Description

technical field [0001] The invention belongs to the technical field of low-speed high-torque transmission, and more specifically relates to a magnetic gear device for improving transmission stability. 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. Affected by the performance of permanent magnets and the topology of magnetic gears in the early stage, the utilization rate of permanent magnet materials and the torque density of magnetic gears are very low. [0003] Conventional magnetic gear units such as image 3 As shown in (b), the inner and outer air gaps are uniform air gaps, and the inner and outer permanent magnets are radially magnetized. Ge...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects and improvement needs of the prior art, the present invention provides a magnetic gear device with improved transmission stability, aiming to solve the problem of low transmission stability in the existing magnetic gear device

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