Variable-frequency control electromagnetic torsion coupler and use thereof

Abstract

The invention relates to a variable-frequency speed-regulating magnetic torque coupler which is characterized in that: the coupler comprises a shell, and an inner rotor mechanical axis and an outer rotor mechanical axis are arranged in the shell; the inner rotor mechanical axis is connected with an inner rotor which is supported on a static bearing frame of the inner rotor, and the outer rotor mechanical axis is connected with an outer rotor which is supported on the static bearing frame of the outer rotor; an electromagnetic coupling working air gap is formed between the inner rotor and the outer rotor; the outer rotor is internally provided with an armature winding which is connected with a group of three-phase static electric brushes by three drainage slipping rings; the three-phase static electric brush is connected with the output end of a frequency converter, and the input end of the frequency converter is connected with a three-phase alternating-current electric fence. As a variable-frequency speed-regulating technology is introduced in a simple electric transmission system, non-contact torque transmission and stepless speed regulation between two rotary mechanical shafts can be realized by utilizing the principle of variable-frequency motors. The variable-frequency speed-regulating magnetic torque coupler can be widely applied to transmission systems.

Description

technical field [0001] The invention relates to an electric transmission device, in particular to a frequency conversion speed regulation electromagnetic torque coupling for electric transmission and energy conversion and its application. Background technique [0002] Transmission technology is one of the basic technologies in many application fields such as industrial and agricultural production, energy extraction, transportation and national defense equipment. In order to maximize the working performance of related equipment in various application fields, it is often necessary to realize stepless speed regulation in the process of power transmission. For example, on the premise that the speed of the input shaft is basically unchanged, it is hoped that the speed of the output shaft of the transmission can be adjusted arbitrarily within a certain range, or conversely when the speed of the input shaft changes within a certain range, the speed of the output shaft can be basica...

AI Technical Summary

Problems solved by technology

Traditional mechanical transmissions such as gearboxes and belts usually have a fixed input / output ratio, which is difficult to directly meet the requirements of stepless speed regulation

The hydraulic coupling can smoothly change the transmission speed ratio by adjusting the pressure and flow of the liquid, but when the transmission speed ratio is large, the working efficiency of this type of device is significantly reduced, and the number of mechanical and hydraulic components used in the hydraulic coupling is relatively large. Many, involving the rotary sealing problem of the high-pressure hydraulic system, sensitive to materials and working environment, short operating life, and relatively large maintenance workload; the composite electric drive system is essentially composed of two motors, one of which is used as a generator , convert all or part of the mechanical power of the input shaft into electrical power, and another motor converts the electrical power into mechanical power. There may be some form of mechanical connection between the two motors, and part of the mechanical power is transmitted to reduce the The amount of electric power that needs to be converted, but the mechanical and electrical structure of the compound electric drive system is relatively complex, large in size, high in cost, and is subject to certain restrictions in actual use; simple electric drive systems, such as electromagnetic slip clutches, have relatively soft Mechanical characteristics, by adjusting the amplitude of its excitation current, the speed of the load can be changed, but similar to the hydraulic coupler, when the speed range is large, its working efficiency is significantly reduced

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