Effective Constitutive Model of Grain-oriented Fe-Si Laminations Core under Orthogonal Magnetization

The mechanism of variable inductor based on orthogonal magnetization was discussed. The experiment and simulation showed that the dc bias field makes the hysteresis loop "shearing" and reduces the enclosed area. Hence the effective permeability decreases with increasing dc bias field. By comparing the shearing hysteresis caused by orthogonal magnetization with escalator, an effective anisotropic energy has been incorporated into the existing isotropic model equations. It has proved that effective constitutive model can adequately described the hysteresis and harmonic characteristic caused by orthogonal magnetization.