Permanent magnet speed controller with fixed magnetic gap

Abstract

The invention relates to a permanent magnet speed controller with a fixed magnetic gap. The permanent magnet speed controller comprises an outer magnet rotor and an inner magnet rotor, wherein at least two outer permanent magnets are uniformly distributed along the circumferential direction of the inner circumferential surface of the outer magnet rotor; the magnetic poles of the outer permanent magnets are arranged along the radial direction, and the magnetisms of exposed magnetic pole surfaces of every two adjacent outer permanent magnets are different; at least one rotatable permanent magnet is distributed along the circumferential direction of the outer circumferential surface of the inner magnet rotor; the rotatable permanent magnet is cylindrical, and the pole N and the pole S are arranged along the diameter direction; and one end of the rotatable permanent magnet is provided with a magnetic circuit regulator. Due to the adoption of the fixed magnetic gap, the meshing area of the speed controller is greatly increased, the assembling difficulty is lowered, the heat generation is reduced, the speed control range is widened, rare earth materials are saved, the torque transfer capacity is greatly improved, the function of controlling the speed at the input and output rotating speed of 0-N% is achieved, the material consumption is reduced, the mounting space is saved, and more importantly, the convenience is brought for field installation and construction.

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

At present, the commonly used permanent magnet governors realize the speed adjustment by adjusting the air gap. The power consumption of the magnetic circuit regulator is large, and there are disadvantages such as poor torque transmission capability, high assembly difficulty, and waste of a large amount of rare earth resources.

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