Study on the Novel Technologies for Design and Analysis of Switching Mode Power-Supply Circuit (SMPC) Based on Solitary Electromagnetic Wave Theory | Chapter 5 | Current Approaches in Engineering Research and Technology Vol. 7

 

The novel solitary electromagnetic wave (SEMW) theory and the design methodologies of the switching mode power-supply circuit (SMPC) are presented. The novel SEMW theory which was developed by fusing semiconductor physics, nonlinear undulation physics, and electromagnetic wave (EMW) physics is the basic theory of the circuit design of all kinds of switching mode circuits (SMC) including SMPC. When the SEMW theory is used, the electromagnetic analysis of SMPC becomes possible by using only parameters that are in accordance with the physics without using the equivalent circuit which is formed by the arbitrary idea. The low impedance lossy line (LILL) and the matched impedance lossy line (MILL) are also presented. They are the typical technologies that were developed based on the SEMW theory. LILL is effective for suppressing the electromagnetic noise and the spike on the unregulated DC line (UDCL) and the regulated DC line (RDCL) on SMPC, and an ideal DC source is provided to the switching device by it at a short distance. The MILL is effective for suppressing the electromagnetic noise and the spike on the switching DC line (SDCL) on SMPC. SMPC can be reconfigured to the quasi-stationary state closed circuit (QSCC) by applying LILL and MILL. LILL and MILL will provide the boundary condition for the electromagnetic analysis of SMC. 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. Normally, the electromagnetic effect and the inductive element of the wire can be ignored on QSCC. When the accurate analysis of the transmission delay of the wire is necessary, the easy method using the element of the capacitance and the resistance can be applied like a design method of on-chip interconnect. As a result, it can say that the conventional AC circuit theory and the circuit simulator such as SPICE were the effective methods of being utilizable on QSCC because the switching time of the device was quite long at this time when these theories and the tools were developed. The state space averaging method for the analysis of the stability control of SMPS will become more reliable when SMPS is reconfigured to QSCC.

 

Author(s) Details

Hirokazu Tohya
ICAST, Inc., 1-26-11 Kinugaoka, Hachioji City, Tokyo, 192-0912, Japan.

 

Please see the book here:- https://doi.org/10.9734/bpi/caert/v7/1239

Analytical Solution to a Duffing Equation with Time Delay | Chapter 3 | Research Updates in Mathematics and Computer Science Vol. 4

In the present paper we give an elementary method in order to solve a delayed Duffing equation. The results are compared with the Runge-Kutta numerical solution.

Author(s) Details:

Alvaro H. Salas S.,
Fizmako Research Group, Universidad Nacional de Colombia, Colombia.

Please see the link here: https://stm.bookpi.org/RUMCS-V4/article/view/14097

Determination of the Vibratory Damping Ratio: A Methodological Review | Chapter 3 | Research and Developments in Engineering Research Vol. 9

 The affiliate devoted to making such judgment is critical and important for protecting structures and society during an earthquake.  This unit seeks to explain the different mathematical and tangible theorems connected to the production of literal expressions, accessible the techniques for calculating the vibratory dampen ratio, and form these techniques more accessible. The dampen ratio is a dimensionless measure describing by what method oscillations in a system decay afterwards a disturbance. Many systems exhibit oscillatory performance when they are disturbed from their position of changeless equilibrium. Vibration damping is an essential limit to reduce the dynamic answers of structures. Among the main arrangements studied in this member, the free vibration attenuation design seems expected easy to implement but requires a new device to capture the answers. In addition to this device, the other plans require other supplies for the vibration of bureaucracy and the transformation of the responses in the commonness domain.

Author(s) Details:

Nkibeu Jean Bertin,
Laboratory Engineering Civil and Mechanics, National Advanced School of Engineering, The University of Yaoundé 1, Cameroon.

Charly Julien Nyobe,
Laboratory Engineering Civil and Mechanics, National Advanced School of Engineering, The University of Yaoundé 1, Cameroon and Department of Civil Engineering, Advanced Technical Teachers Training College, The University of Douala, Cameroon.

Moussa Sali,
Department of Civil Engineering, Advanced Technical Teachers Training College, The University of Douala, Cameroon and Mechanics Laboratory, Advanced Technical Teachers Training College, The University of Douala, Cameroon.

Madja Doumbaye Jerémie,
Laboratory Engineering Civil and Mechanics, National Advanced School of Engineering, The University of Yaoundé 1, Cameroon and Department of Civil Engineering, National Advanced School of Public Works, Cameroon.

Please see the link here: https://stm.bookpi.org/RADER-V9/article/view/12226