Method for calculating transmission torque of permanent-magnet magnetic coupler

Abstract

The invention discloses a method for calculating the transmission torque of a permanent magnet magnetic coupler, and belongs to the technical field of permanent magnet transmission. The method comprises the following steps of firstly, enabling a fan-shaped eddy current region generated on a conductor disc to be equivalent to a circle, and calculating the total eddy current loss power of the conductor disc region according to the Faraday law of electromagnetic induction; and according to a topological structure of the permanent magnet magnetic coupler, establishing a magnetic circuit equivalentmodel containing the main magnetic flux, the leakage magnetic flux, the effective magnetic flux and the induced magnetomotive force; according to the design size of the permanent magnet magnetic coupler, calculating the permanent magnet magnetomotive force, the eddy current area induction magnetomotive force, the main magnetic flux magnetic resistance and the leakage magnetic flux magnetic resistance, and calculating the transmission torque of the permanent magnet coupler, and comparing the transmission torque with the result of a finite element calculation method. The method is a calculationmethod with the engineering practical application value, and is simple and is high in calculation efficiency and low in time cost.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet transmission, and relates to a method for calculating the transmission torque of a permanent magnet magnetic coupler. Background technique [0002] With the continuous improvement of industrial level and scientific and technological strength, high-end equipment in the field of major national projects has put forward higher requirements for efficient and highly reliable transmission technology. Permanent magnet coupling transmission technology is widely used in petroleum, chemical, coal, electric power and other major projects due to its advantages of high efficiency and energy saving, strong environmental adaptability, good speed regulation performance, smooth start, overload protection, low cost and low vibration interference, etc. field. Among them, permanent magnetic coupling is an important classification of permanent magnetic coupling transmission technology. The effective calculati...

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Problems solved by technology

[0004] In order to overcome the defects of the prior art, the present invention invents a method for calculating the transmission torque of a permanent magnet magnetic coupler, which improves the defects of complex modeling and low calculation efficiency of the finite element calculation method, and is based on the topology of the permanent magnet magnetic coupler characteristics, build a magnetic circuit equivalent model including the main magnetic flux, leakage magnetic flux, effective magnetic flux and induced magnetomotive force, establish the magnetic circuit equivalent model equation, solve the effective magnetic induction intensity passing through the conductor disk, and analyze it through analytical calculations. Obtain the results of the permanent magnet magnetic coupling torque transmission

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