Novel Technologies for Design and Analysis of Switching Mode Power-Supply Circuit Based on Solitary Electromagnetic Wave Theory

The novel solitary electromagnetic wave (SEMW) theory and the novel design methodologies of the switching mode power supply circuit (SMPC) are presented. The SEMW theory was developed as a basic theory of the design of all kinds of the switching mode circuit including SMPC by fusing the physics of semiconductor, nonlinear undulation, and electromagnetic wave. When the SEMW theory is used, the electromagnetic analysis of SMPC becomes possible by using only the real parameters based on the physics. The technologies of the low impedance lossy line (LILL) which is used to the DC line and the matched impedance lossy line (MILL) which is used to the switching line are also presented. They are effective for suppressing the electromagnetic interference. SMPC can be reconfigured to the quasistationary state closed circuit (QSCC) by applying LILL and MILL in accordance with the SEMW theory. No electromagnetic interference exist in QSCC. The buck converter which is one of the most popular DC-DC converters is presented as an example of the method for being reconfigured to QSCC. The conventional design tools which includes SPICE based on the AC circuit theory will be effective for the design and analysis of the inside circuit of QSCC. 1. Introduction The SMPC can be considered to be a kind of the oscillators and of the high performance power MOSFET is comparable to that of the MOSFET of LSI. The switching frequency of almost AC-DC converters is lower than 150？kHz because the disturbance at the mains port of ITE is limited at the frequency band of between 150？kHz and 30？MHz by IEC. In addition, SMPS generates the the large radiated disturbance that is lower than a few hundred mega-hertz. For this, the snubber, many kinds of filter, and the partial resonant circuit have been used [1–3], and the technology of the spread spectra clock has been applied [4]; however, the cost and the size will be increased by these measures. SMPC is a kind of the AC circuit, which is defined by the electromagnetism as the circuit of the EMW. EMW is generated when the electric field or the magnetic field is changed. EMW can travel at quasilight speed through the insulator of the transmission line. According to the Ampère’s circuital law in the electromagnetism, AC current is defined as line integral of the magnetic field around the wire. It has been believed that the switching voltage wave of SMPC consists of many harmonic waves by the idea of the Fourier transform. It is very convincing mathematically. However, this idea should be denied because the switching voltage shape is formed by