抄録
We present a model in the frequency domain of the dynamic characteristics of magnetic actuators with a C-shaped stator of solid iron core without leakage flux. First, with eddy current effects, simple approximations are proposed with half-power of frequency and a complex number to a theoretical magnetic reluctance based on a two-dimensional analysis. Magnetic hysteresis effects are considered in a simple way on the assumptions that the static hysteresis loop is approximated by an elliptical function and applicable to the dynamics in its original form. The dynamic characteristics of the incremetal magnetic flux and coil-current are obtained through the magnetic circuit theory with the variation of a working air-gap. To check the model, the numerical frequency responses are compared with the experimental results when the working air-gap is fixed.
