A Simplified Torque Calculation Method for Axial Flux Permanent Magnet Eddy Current Couplings
A technology of permanent magnet eddy current and calculation method, which is applied in electromechanical transmission devices, electromechanical devices, electrical components, etc., and can solve problems such as inability to take into account induced current, large torque calculation results, and system errors
Active Publication Date: 2019-03-22
NANJING INST OF TECH
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[0005] The purpose of the present invention is to provide a simplified axial flux permanent magnet eddy current coupling torque calculation method to solve the problem in the prior art that the influence of induced current cannot be effectively taken into account in the magnetic circuit model, resulting in torque There is a large systematic error in the calculation results
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[0055] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of this patent can be more easily understood by those skilled in the art, so that the protection scope of the present invention can be defined more clearly.
[0056] Such asfigure 1 As shown, the structure diagram of the axial flux permanent magnet eddy current coupling applied to the method of the present invention; the permanent magnet eddy current coupling is mainly composed of a permanent magnet rotor and a conductor rotor, and the permanent magnet rotor consists of several pairs of The permanent magnet 1 of the magnetic pole and the back iron plate 2 of the permanent magnet are formed, and the conductor rotor is composed of a circular copper plate 3 with a smooth surface and a conductor back iron plate 4 .
[0057] Such as figure 2 As shown, the actual permanent magnet eddy current coupling (including permane...
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The invention provides a simplified method for calculating the torque of an axial flux permanent-magnet eddy-current coupler. The method includes: building 1 / 2 magnetic circuit models corresponding to a pair of magnetic poles of the permanent-magnet eddy-current coupler according to a symmetrical relation and a conductor eddy-current reaction field; calculating permanent magnet magnetomotive force Fm, main flux magnetic resistance Rm, Ra and Rc and leakage flux magnetic resistance R11 and R12 according to the design parameters of the permanent-magnet eddy-current coupler; calculating the effective flux phie passing a conductor area; calculating the electromagnetic force and torque generated by a conductor rotor. The method has the advantages that the magnetomotive force generated by conductor induction currents is introduced into the magnetic circuit models, corresponding leakage magnetic branch circuits are built, the influence of main flux on induction currents is considered effectively, and the leakage flux between adjacent permanent magnet magnetic poles and between the permanent magnet and the back iron of the permanent magnet is considered; the built magnetic circuit models are close to the actual flux and eddy current distribution conditions of the permanent-magnet eddy-current coupler, and the torque calculation models based on the magnetic circuit method are high in accuracy under a normal steady-state condition.
Description
technical field [0001] The invention relates to a simplified torque calculation method of an axial magnetic flux permanent magnet eddy current coupling. Background technique [0002] The permanent magnet eddy current coupling has the advantages of remarkable energy saving effect and high process control precision. It 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 control. It has broad application prospects in many industrial fields. [0003] At present, the analysis and prediction of the torque characteristics of the permanent magnet eddy current coupling are basically realized through the calculation process of the electromagnetic field. The calculation methods for solving the field equation mainly include the analytical method and the finite element method, and finally the power, electromagnetic force, and electromagnetic torque are ob...
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IPC IPC(8): H02K51/00
CPCH02K51/00
Inventor 王坚蒋春容李宏胜
Owner NANJING INST OF TECH