Permanent magnet speed regulator with fixed magnetic gap

Abstract

The invention relates to a permanent magnet speed regulator with a fixed magnetic gap, and the speed regulator comprises a first internal magnetic rotor, a second internal magnetic rotor, and an external magnet rotor frame, wherein a driving shaft coaxially passes through the first and second internal magnetic rotors, and the external magnet rotor frame is connected with a driven shaft. The external magnet rotor frame is provided with an external magnetic rotor through a bearing. In addition, one end, close to the driven shaft, of the external magnetic rotor is provided with an external magnetic rotor planetary gear. A driven shaft planetary gear is disposed between the external magnetic rotor planetary gear and the driven shaft. The speed regulator employs a fixed magnetic gap structure, so the speed regulator greatly increases the engagement area, reduces the assembly difficulty, reduces the generated heat, enlarges the range of speed regulation, saves rare earth materials, and greatly improves the capability of torque transmission. Because the speed regulator employs a planetary gear transmission structure, the speed regulator achieves a function of 0-%N speed regulation of input and output rotating speeds through changing the gear ratio of the external magnetic rotor planetary gear to the driven shaft planetary gear. In addition, the speed regulator employs a bearing structure, and prevents the continuous shaking of the driven shaft in two directions from causing that the driven shaft cannot rotate normally in one direction to drive a load.

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 continuously in two directions, and cannot normally rotate in one direction to drive the load

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