Abstract
Establishing the analytical model for accurately predicting the transmitted torque of the permanent magnet eddy current coupler (PMEC) with double conductor rotors is very important to study the nonlinear transmission performance of the PMEC. In this paper, based on magnetic equivalent circuit (MEC) approaches, considering the effects of permanent magnet (PM) end leakage, side leakage, and back iron saturation, the 3D magnetic field model of the PMEC is established. Based on the magnetic field model, combined with Faraday’s law and Ampere’s law, the 3D nonlinear model of the PMEC is established. The proposed model adopts the Jenei method to describe the inductance limited eddy current field. The theoretical data, 3D finite element method (FEM) data, and experimental data are compared. The research shows that the predicted value of the analytical model matches well with the torque obtained by 3D FEM and experiments in the range of 0-100% slip, with an error less than 5.3% observed. Finally, the influence of structural parameters on the transmission performance of the PMEC is studied by using the proposed model.
Highlights
Large-scale rotating equipment is the important power equipment in many areas, such as electric industry, iron & steel industry, petrochemical industry, transportation, and so on
The research shows that the predicted value of the analytical model matches well with the torque obtained by 3D finite element method (FEM) and experiments in the range of 0-100% slip, with an error less than 5.3% observed
The influence of structure parameters on the transmission of the permanent magnet eddy current coupler (PMEC) is studied by 3D FEM
Summary
Large-scale rotating equipment is the important power equipment in many areas, such as electric industry, iron & steel industry, petrochemical industry, transportation, and so on. In order to solve the problem of alignment, researchers have successfully explored a nonphysical contact transmission technology It is magnetically coupled technology [3,4,5,6]. Li Z et al study the magnetic field, eddy current, and torque of the PMEC by the 3D FEM. Compared with experiment and FEM, the validity of the model was verified under 8% slip [25,26,27]. Wang J et al study the transmission performance of the PMEC by the MEC, and accurate prediction torque was obtained at 10% slip [28, 29]. Compared with the 3D FEM and experiment, the validity of the proposed model is verified, and the influence of sensitive parameters.
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