Permanent magnet speed adjuster with fixed magnetic gap

Abstract

The invention relates to a permanent magnet speed adjuster with a fixed magnetic gap, which comprises a first inner magnetic rotor, a second inner magnetic rotor and an outer magnetic rotor frame, wherein a driving shaft concentrically passes through the first inner magnetic rotor and the second inner magnetic rotor; the outer magnetic rotor frame is connected with a driven shaft; the outer magnetic rotor frame is provided with an outer magnetic rotor via a bearing; the first inner magnetic rotor and the second inner magnetic rotor are both provided with at least two first inner permanent magnets and second inner permanent magnets distributed circumferentially and uniformly along the outer circumferential surfaces; and the first inner magnetic rotor is provided with a magnetic circuit adjustment executor driving the first inner magnetic rotor to rotate relative to the second inner magnetic rotor. As the fixed magnetic gap structure is adopted, the meshing area of the speed adjuster is greatly improved, the assembly difficulty is reduced, heat generation is reduced, the speed adjustment range is increased, rare earth materials are saved, and the torque transfer capability is greatly improved. As the bearing structure is adopted, the phenomenon that as the driven shaft shocks back and forth along two directions, the driven shaft can not rotate normally along one direction to drive a load can be avoided.

Description

technical field [0001] The invention relates to a permanent magnet governor, in particular to a permanent magnet governor with a fixed magnetic gap. Background technique [0002] The permanent magnet speed governor uses the magnetic coupling speed of the permanent magnet to realize the soft (magnetic) connection between the motor and the load, without any harmonic generation affecting the power grid, and has high reliability. , Inflammable and explosive, voltage instability and lightning and other harsh environments, greatly reducing mechanical vibration, widely used in electric power, steel, metallurgy, petrochemical, papermaking, municipal, ships, irrigation and mining industries. At present, the commonly used permanent magnet governors realize the speed adjustment by adjusting the air gap. The magnetic circuit regulator consumes a lot of power, and has disadvantages such as poor torque transmission capability, high assembly difficulty, and waste of a large amount of rare ...

AI Technical Summary

Problems solved by technology

In order to solve the above problems, the patent CN201520071349 proposes a permanent magnet governor with a fixed magnetic gap, but when the first inner magnetic rotor and the second inner magnetic rotor rotate, the corresponding relationship between the first permanent magnet and the second permanent magnet The polarity of the magnetic pole is constantly switched between the same and different, which causes the driven shaft to oscillate back and forth in two directions, and cannot normally rotate in one direction to drive the load

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