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This paper presents magnetic energy propagation mode excited on nonlinear LC circuit. First, we propose an inductor whose flux is a cubic function of current. The excitation and propagation of the magnetic energy was successfully confirmed through 3-D axisymmetric finite element analysis. Next, we propose the inductor whose flux is exponential function of current. The magnetic energy propagation called soliton is successfully observed under the nonlinear LC circuit.

In three-phase AC motors, three-phase AC voltage system is essential to generate a rotating magnetic field. Threephase AC motors also require a three-phase inverter for variable speed and torque operation. In general, the number of switching devices used in three-phase inverter is not less than six and decreasing its number is difficult. This paper focuses on an LC ladder circuit consisting of linear inductors and capacitors. This paper presents a new operating method of the AC motor based on a propagating magnetic field. It is successfully excited by connecting one single-phase AC power supply to the end of the LC ladder circuit. The induction motor operated by the presented method produces torque as in general induction motors.