Permanent magnet rotating coupling induction type asynchronous speed regulation system of axial magnetic field structure

Abstract

The permanent magnet rotation coupling induction asynchronous speed regulation system with axial magnetic field structure is a permanent magnet rotation coupling induction automatic speed regulation system adopting the principle of asynchronous motor model, which has the advantages of isolating impact load, anti-low voltage blocking, high efficiency and energy saving, etc. , can be widely used in small and medium-sized motor drive and power transmission fields that require automatic speed regulation and high safety requirements. Its features are: the system consists of a permanent magnet rotary induction type asynchronous coupler body 1, a servo worm gear reduction mechanism 2, a cam-type stroke ejection adjustment mechanism 3, an automatic controller 4 and an AC asynchronous motor 5, which are integrated and installed to form electromechanical integration Structure: under the control of the automatic controller 4, the AC asynchronous motor 5 drives the permanent magnet rotor disc 1‑1 and the induction rotor disc 1‑2 to run asynchronously in the same direction, and the servo worm gear reduction mechanism 2 drives the cam type stroke ejection adjustment mechanism 3 Realize linear reciprocating motion to adjust the air gap length δ between the two rotor disks, so as to automatically adjust the output speed n 2 .

Description

technical field [0001] The invention is a permanent magnet rotation coupling induction type asynchronous speed regulation system with an axial magnetic field structure. It is a permanent magnet rotation coupling induction type automatic speed regulation system adopting the principle of an asynchronous motor model. It has the functions of isolating impact load and resisting low voltage blocking , high efficiency and energy saving, etc., can be widely used in small and medium-sized motor drive and power transmission fields that require automatic speed regulation and high safety requirements. Background technique [0002] At present, a large number of AC asynchronous motors (including 380V / 660V low-voltage motors and 3KV / 6KV medium-voltage motors) are used in industrial and mining enterprises. The conventional AC asynchronous motor drive system cannot achieve smooth speed adjustment, but most industrial loads often It also requires the drive system to have variable speed adjust...

AI Technical Summary

Problems solved by technology

[0002] At present, a large number of AC asynchronous motors (including 380V / 660V low-voltage motors and 3KV / 6KV medium-voltage motors) are used in industrial and mining enterprises. The conventional AC asynchronous motor drive system cannot achieve smooth speed adjustment, but most industrial loads often It also requires the drive system to have variable speed adjustment capability; the emergence of AC motor frequency conversion speed regulation technology has effectively solved the problem of load speed regulation, so it has been widely used in a large number of industrial fields; but frequency conversion technology also has its specific defects: first, low The power loss of frequency band inverters is large, which can easily lead to vicious accidents such as heating and burning; second, the inverter is very sensitive to voltage shocks and fluctuations caused by power grids, loads, and even lightning, and often locks up due to instantaneous low-voltage surges Protection, causing the motor drive system to shut down due to lack of power, which will lead to major safety accidents that cause fatal large-scale hosts to stop in some industrial occasions with high safety requirements (for example: coal feeders, powder feeders, etc. in thermal power plants) Auxiliary machines, fluid pumps for large reactors in chemical plants, air supply systems for steelmaking and ironmaking blast furnaces in iron and steel plants, etc.); third, the maintenance cost of frequency conversion technology is very high (professional maintenance personnel are generally required), and the required working environment is very Harsh (generally requires air conditioning to work at constant temperature); Fourth, the service life of the inverter is limited, generally only about 5 years

The above magnetic circuit structure and circuit structure are mixed and intertwined with each other, and there is no independent magnetic field path and current path. This structural defect causes the torque and power transmitted by the permanent magnetic coupling speed governor to be greatly limited, and makes the permanent magnetic coupling governor. The heating phenomenon of the magnetic coupling governor is very serious

In fact, in the industrial field that has been used, the heating problem of this type of permanent magnetic coupler has always been its fatal flaw, and a special radiator has to be installed, and there are even special measures such as water cooling.

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