Permanent-magnet coupling control method and permanent-magnet speed regulator

Abstract

The invention provides a permanent-magnet coupling control method and a permanent-magnet speed regulator. The method comprises a permanent-magnet coupling speed regulator. The permanent-magnet speed regulator comprises a conductor rotor, a permanent-magnet rotor and an operation mechanism. The conductor rotor of the permanent-magnet coupling speed regulator is in the form of a conductor disc or a conductor ring. The permanent-magnet rotor of the permanent-magnet coupling speed regulator comprises two iron disc supports or two iron ring supports, wherein the two iron disc supports or the two iron ring supports are symmetrically arranged on the two sides of the conductor rotor. One side of the iron disc supports or the iron ring supports, positioned closer to the conductor rotor, is provided with permanent magnets, and the permanent magnets are alternately arranged in the polarity alternation manner. The permanent magnets are kept in the coupling state to be not in contact with the conductor disc or the conductor ring. Through changing the relative positions of the two iron disc supports or the two iron ring supports along the circumferential direction, the positional angles of the magnetic poles of the permanent magnets on the iron disc supports or two iron ring supports on the two sides of the conductor rotor relative to the circumferential direction can be changed, so that the coupling strength of a conductor-cutting magnetic field can be regulated. Through changing the induced eddy current inside the conductor disc or the conductor ring, the torque caused by the conductor disc or the conductor ring of the conductor rotor under the effect of the coupling strength-adjustable magnetic field can be changed. Therefore, the speed regulation of the transmission is realized.

Description

technical field [0001] The invention relates to a frequency converter, in particular to a permanent magnet coupling control method and a permanent magnet governor, belonging to the technical field of consumption reduction and energy saving. Background technique [0002] At present, frequency converters are widely used in the field of motor speed regulation. The control method is to change the input voltage frequency of the motor to control the speed of the motor and load. With the help of the high-efficiency and controllable advantages of power electronic devices, the AC power supply is adjusted by rectification, filtering, and inversion, and then changed into a voltage whose amplitude and frequency meet the requirements of the motor's working conditions, so as to optimize the operating efficiency of the motor and achieve energy saving and emission reduction etc. purpose. [0003] However, there are the following disadvantages in using the frequency converter to adjust the...

AI Technical Summary

Problems solved by technology

[0005] 2. Power electronic devices are high-precision components, poor adaptability to changes in the surrounding environment, sensitive to external factors, easy to damage, and limited service life

[0007] 4. The frequency converter is assembled between the motor and the power supply, which cannot change the status quo of the hard connection between the motor and the load, and cannot remove the influence of the vibration of the motor and load on the life of the transmission system

These permanent magnet coupling speed governors regulate the torque and speed by adjusting the axial position of the conductor rotor and the permanent magnet rotor, that is, adjusting the action area between the conductor rotor and the permanent magnet rotor. Many problems, reducing the practicality

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