scholarly journals Analysis and design of LCS resonant cell based enhanced zero-voltage transition DC-DC boosting converter

2019 ◽  
Vol 16 (1) ◽  
pp. 105-121
Author(s):  
Anandh Nagarajan ◽  
Sekaran Fusic
Keyword(s):  
Dynamic Performance ◽  
Salient Feature ◽  
Peak Current ◽  
Current Stress ◽  
Load Variations ◽  
Analysis And Design ◽  
Switching Performance ◽  
Source Current ◽  
Zero Voltage ◽  
Load Conditions

An enhanced zero-voltage transition boosting converter (EZVTBC) is introduced here which belongs to higher-order family. It exhibits lower source current and load voltage ripples and also it maintains better voltage gain with respect to traditional step-up converter. The zero-voltage transition is attained with an aid of a LCS resonant cell integrating Lr - Cr resonance tank network along with an extra switch. LCS resonant cell is the modified version of conventional ZVT switch cell and the salient feature of this cell is to eliminate peak current stress and conduction losses of main switch as this remains a predominant problem in hard-switched boost converter and it also improves efficiency. Initially, time domain expressions of EZVTBC are derived using Kirchhoff?s laws for different operational stages to predict the resonant transition phenomenon. The simulation is progressed in PSIM software in order to verify its soft-switching performance on a 12 - 24 V, 30 W converter and also dynamic performance of the converter has been studied with line and load variations. It is found that for rated load conditions, efficiency of the soft-switched converter is improved 5 to 10% approximately and resulted in 97%. Moreover the peak current stress and conduction losses were eliminated.

Analysis and Design of a Robust RF MEMS Switch

2012 ◽  
Author(s):  
Ibrahim Chamseddine ◽  
Hadi Kasab ◽  
Maya Antoun ◽  
Tawfiq Dahdah ◽  
Mohammed Mirhi ◽  
...  
Keyword(s):  
Failure Modes ◽  
Rf Mems ◽  
Dielectric Breakdown ◽  
Rf Switch ◽  
Switching Speed ◽  
Analysis And Design ◽  
Electrostatically Actuated ◽  
Mems Switch ◽  
Switching Performance ◽  
Contact Adhesion

A MEMS RF switch is expected to undergo 10 billion switching cycles before failure. Until complete physical explanation for these failure modes that include contact adhesion, damping effects, stiction, increases in resistance with time, dielectric breakdown, and electron trapping is fully established, the technology’s numerous advantages cannot be harvested reliably and efficiently. This paper investigates prospective solutions to problems in switch designs by proposing a new design for the switch. We consider the new design from different perspectives: dynamic, electric, fluidic, etc. It is billed to overcome the difficulties and involves the implementation of liquid metal contact electrostatically actuated to ensure the same switching performance, with prolonged life span, and robust switching speed.

The Analysis and Design of Hydraulic Pressure-Reducing Valves

1967 ◽  
Vol 89 (2) ◽  
pp. 301-308 ◽  
Author(s):  
C. Y. Ma
Keyword(s):  
Dynamic Analysis ◽  
Characteristic Curve ◽  
Dynamic Performance ◽  
Static Characteristic ◽  
Hydraulic Pressure ◽  
Loop Gain ◽  
Gain Function ◽  
Time Constants ◽  
Static And Dynamic Characteristics ◽  
Analysis And Design

This paper presents the static and dynamic characteristics of single-stage pressure-reducing valves and establishes design criteria. The dynamic analysis was accomplished using frequency-response techniques. A simplified loop gain function is developed for the valve and consists of a loop gain constant and two dominant time constants. The static characteristic curve and dynamic analysis were verified experimentally. A relationship between static and dynamic performance is also given.

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