scholarly journals A Comparative Study of Symmetrical Cockcroft-Walton Voltage Multipliers

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Mohsen Ruzbehani
Keyword(s):  
Comparative Study ◽  
High Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Voltage Level ◽  
Voltage Multiplier ◽  
Voltage Ratio ◽  
Voltage Stress ◽  
Cost Of Construction

Decades after invention of the Cockcroft-Walton voltage multiplier, it is still being used in broad range of high voltage and ac to dc applications. High voltage ratio, low voltage stress on components, compactness, and high efficiency are its main features. Due to the problems of original circuit, reduction of output ripple and increase of accessible voltage level were the motivations for scientist to propose new topologies. In this article a comparative study on these voltage multipliers was presented. By simulations and experimental prototypes, characteristics of the topologies have been compared. In addition to the performances, components count, voltage stress on the components, and the difficulty and cost of construction are other factors which have been considered in this comparison. An easy to use table which summarized the characteristics of VMs was developed, which can be used as a decision mean for selecting of a topology based on the requirements. It is shown that, due to the application, sometimes a simple and not very famous topology is more effective than a famous one.

scholarly journals Novel High-Efficiency High Step-Up DC–DC Converter with Soft Switching and Low Component Voltage Stress for Photovoltaic System

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1112
Author(s):  
Yu-En Wu ◽  
Jyun-Wei Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Leakage Inductance ◽  
Power Switch ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Voltage Stress ◽  
Voltage Doubler

This study developed a novel, high-efficiency, high step-up DC–DC converter for photovoltaic (PV) systems. The converter can step-up the low output voltage of PV modules to the voltage level of the inverter and is used to feed into the grid. The converter can achieve a high step-up voltage through its architecture consisting of a three-winding coupled inductor common iron core on the low-voltage side and a half-wave voltage doubler circuit on the high-voltage side. The leakage inductance energy generated by the coupling inductor during the conversion process can be recovered by the capacitor on the low-voltage side to reduce the voltage surge on the power switch, which gives the power switch of the circuit a soft-switching effect. In addition, the half-wave voltage doubler circuit on the high-voltage side can recover the leakage inductance energy of the tertiary side and increase the output voltage. The advantages of the circuit are low loss, high efficiency, high conversion ratio, and low component voltage stress. Finally, a 500-W high step-up converter was experimentally tested to verify the feasibility and practicability of the proposed architecture. The results revealed that the highest efficiency of the circuit is 98%.

scholarly journals Single-switch high-efficiency hybrid boost–Ćuk DC/DC converter with high-voltage gain and low-voltage stress

2020 ◽  
Vol 13 (12) ◽  
pp. 2538-2546
Author(s):  
António Manuel Santos Spencer Andrade ◽  
Tiago Miguel Klein Faistel ◽  
Ronaldo Antonio Guisso
Keyword(s):  
High Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Voltage Stress

scholarly journals A Quadratic Boost Converter with Voltage Multiplier Cell to Increase Voltage Gain

2021 ◽  
Vol 7 (03) ◽  
pp. 76-79
Author(s):  
P.Rangeela and Dr.A.RubyMeena
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Boost Converter ◽  
Voltage Gain ◽  
Loop Control ◽  
Voltage Multiplier ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Integral Controller ◽  
Proportional Integral Controller

The high step up dc-dc converter with a quadratic boost converter with voltage multiplier cell (VM) to achieve a high voltage gain in the continuous conduction mode (CCM). To increase higher voltage gain, lower voltage stress on diodes and capacitors and requiring smaller inductors with reduced number of components. Quadratic Boost DC-DC converters are mainly used in applications like HEVs and EVs vehicles. The purpose of boost converter is to charge a low-voltage (12 V) battery during boost mode and to assist the high-voltage 200V battery. In this implementation, closed-loop control in high voltage side is implemented using PI (proportional integral) controller.

scholarly journals A Quadratic Boost Converter with Voltage Multiplier Cell to Increase Voltage Gain

2021 ◽  
Vol 7 (03) ◽  
pp. 76-79
Author(s):  
P.Rangeela and Dr.A.RubyMeena
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Boost Converter ◽  
Voltage Gain ◽  
Loop Control ◽  
Voltage Multiplier ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Integral Controller ◽  
Proportional Integral Controller

The high step up dc-dc converter with a quadratic boost converter with voltage multiplier cell (VM) to achieve a high voltage gain in the continuous conduction mode (CCM). To increase higher voltage gain, lower voltage stress on diodes and capacitors and requiring smaller inductors with reduced number of components. Quadratic Boost DC-DC converters are mainly used in applications like HEVs and EVs vehicles. The purpose of boost converter is to charge a low-voltage (12 V) battery during boost mode and to assist the high-voltage 200V battery. In this implementation, closed-loop control in high voltage side is implemented using PI (proportional integral) controller

A High-Voltage ZVZCS DC--DC Converter With Low Voltage Stress

2008 ◽  
Vol 23 (6) ◽  
pp. 2630-2647 ◽  
Author(s):  
Ting-Ting Song ◽  
Huai Wang ◽  
H.S.-H. Chung ◽  
S. Tapuhi ◽  
A. Ioinovici
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Voltage Stress

scholarly journals High Step-up Coupled Inductor Inverters Based on qSBIs

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3032 ◽  
Author(s):  
Hongchen Liu ◽  
Xi Su ◽  
Junxiong Wang
Keyword(s):  
Steady State ◽  
High Voltage ◽  
Low Voltage ◽  
Duty Ratio ◽  
Voltage Gain ◽  
Passive Components ◽  
Steady State Analysis ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Working Principle

In this paper, two types of high step-up coupled inductor inverters based on qSBIs (quasi- switched boost inverters) are proposed. By applying the coupled inductor to the qSBIs, the voltage gain of the proposed inverter is regulated by turn ratio and duty ratio. Thus, a high voltage gain can be achieved without the circuits operating at the extreme duty cycle by choosing a suitable turn ratio of the coupled inductor. In addition, the proposed circuits have the characteristics of continuous input current and low voltage stress across the passive components. A boost unit can be added to the proposed inverters for further improvement of the voltage gain. In this paper, the working principle, steady state analysis, and the comparisons of the proposed inverter with other impedance-source inverters are described. A 200 W prototype was created and the experimental results confirm the correctness of the analysis in this paper.

scholarly journals A Modified High Voltage Gain SEPIC Based DC-DC Converter with Continuous Conduction Mode

2020 ◽  
Vol 6 (12) ◽  
pp. 268-274
Author(s):  
G.Vijaykumar and Dr.V.Geetha
Keyword(s):  
High Voltage ◽  
High Efficiency ◽  
Input Voltage ◽  
Voltage Gain ◽  
Pv System ◽  
Operating Modes ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
High Output Voltage ◽  
High Output

A high voltage gain modified SEPIC converter is proposed in this paper. This proposed converter has many advantages i.e., high output voltage, lower voltage stress, high efficiency, voltage gain is high without any coupled inductor and transformer, continuous input current. Thus, there is no overshoot voltage at turn-off process for switches. By using single switches, the CCM mode operation can be easily controlled by this converter, so control system is simple and also wide output values is obtained only by modifying the duty cycle. This modified converter has lower components than conventional converter. The operating modes and design of modified converter are discussed. The output power of this converter is 6 watts. By this converter, this converter capable of developing the two and half times of input voltage. The PV system also used this converter to develop high voltage gain. This high voltage gain is achieved by using MATLAB/SIMULIMK platform.

A High-Voltage DC-DC Converter with Low-Voltage Stress and Output Current Tripler

2006 ◽  
Author(s):  
Ting-ting Song ◽  
H.S.H. Chung ◽  
A. Ioinovici
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Output Current ◽  
Voltage Stress

A high speed, low voltage to high voltage level shifter in standard 1.2 V 0.13 μm CMOS

2008 ◽  
Vol 55 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Bert Serneels ◽  
Michiel Steyaert ◽  
Wim Dehaene
Keyword(s):  
High Voltage ◽  
High Speed ◽  
Low Voltage ◽  
Voltage Level ◽  
Level Shifter
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