An axial magnetic flux permanent magnet eddy current coupler electromagnetic torque analysis algorithm

Abstract

The invention provides an axial magnetic flux permanent magnet eddy current coupler electromagnetic torque analysis algorithm. The algorithm is characterized by firstly calculating the equivalent average magnetic conductivity [mu]eq of back iron of a conductor; determining the specific forms of various coefficients correlating with the number of times of harmonic n in field domain magnetic vector potential expressions of the conductor and the back iron thereof; then calculating an eddy current transverse effect correction factor k's; finally obtaining an electromagnetic torque value under the given air gap and slip ratio. The axial magnetic flux permanent magnet eddy current coupler electromagnetic torque analysis algorithm gives full consideration to the factor that the transverse effect correction factor changes with the speed (slip), the establish theoretical modeling is approximate to actual conditions, and permanent magnet eddy current coupler electromagnetic torques under various working conditions can be predicted accurately.

Description

technical field [0001] The invention relates to an electromagnetic torque analysis algorithm of an axial magnetic flux permanent magnet eddy current coupling. Background technique [0002] The permanent magnet eddy current coupling not only has the advantages of remarkable energy saving effect and high process control precision, but also has the advantages of no electromagnetic harmonics, good vibration reduction effect, low total cost, low maintenance cost, long service life, overload protection and soft start / soft Braking and other characteristics have broad application prospects in many industrial fields such as metallurgy, chemical industry, electric power, water supply and mining. The permanent magnet eddy current coupling is mainly composed of a permanent magnet rotor and a conductor rotor. The conductor rotor is usually composed of a smooth-surfaced circular copper disc and a back iron disc. The axial flux permanent magnet eddy current coupling installs the permanent...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an electromagnetic torque analysis algorithm for axial magnetic flux permanent magnet eddy current couplings, which solves the problem in the prior art that the transverse effect correction applicable to various speed (slip) conditions cannot be effectively given Factor expression, resulting in a large deviation between the torque calculation result and the actual value at high speed (slip), and the contribution of the conductor back iron to the electromagnetic torque is usually ignored, which also has a certain difference from the actual situation.

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