Research on stress of magnetically controlled saturable reactor under practical working conditions

Due to the special structure and working mode of AC and DC excitation, the vibration of magnetically controlled saturated reactors (MCSRs) is larger than that of the ordinary ones. In order to design an appropriate damping system or vibration isolation system for MCSRs, this paper studies the stress characteristic which is the inherent reason of vibration and noise. The multi-group magnetization and magnetostrictive curves of the silicon steel under different compressive forces with different DC bias excitations are tested in this paper. Based on the measured constitutive relations, an electromagnetic-mechanical coupled numerical model for MCSRs is established. Considering the electromagnetic force and magnetostriction force, the magnetic field and stress distribution under practical working conditions are calculated for MCSRs. During the calculation, the control circuit of MCSRs is coupled to the finite element model, which provides the theoretical basis for vibration and noise reduction of MCSRs.