| The nonlinear and non-uniform distribution of the magnetic induction intensity in the working air gap of electrodynamic shakers causes the distortion of the excitation waveform, which affects the reproduction of the actual working conditions. Considering the leakage flux, a mathematical analytical model of the excitation magnetic field strength of a 3t electrodynamic shaker is established, and the corresponding relationship between the magnetic induction strength of the working air gap and the excitation current in the excitation coil, the magnet steel material of the magnetic circuit structure, and the dimensions of the magnetic circuit structure is extracted; a simulation and analysis model of the excitation magnetic field of the electrodynamic shaker is constructed by using Maxwell software, and the nonlinear distribution of the magnetic induction strength of the working air gap is analyzed under the influence of different excitation currents, magnet steel materials, and working air gaps of different heights and widths. analyzed the nonlinear characteristics of the working air gap magnetic induction intensity of the electrodynamic shaker under the influence of different excitation currents, magnet steel materials and different heights and widths of the working air gap, and obtained the nonlinear relationships between the excitation current in the excitation coil and the working air gap magnetic induction intensity, different magnet steel materials and the working air gap magnetic induction intensity, and the working air gap magnetic induction intensity and the range of the homogeneous intervals; and through the electrodynamic shaker excitation magnetic field leakage measurement test Verify the correctness of the simulation and analysis model of electrodynamic shaker excitation magnetic field constructed by Maxwell software; provide theoretical and data references for reducing the nonlinear and non-uniform distribution influence of the magnetic induction strength of the working air gap, avoiding the reproduction of the actual working conditions affected by the distortion of the electrodynamic shaker's excitation waveforms, and realizing the design and optimization of the electrodynamic shaker's excitation magnetic field. |
