Switching Strategy Development, Dynamic Model, and Small Signal Analysis of Current-Fed Cockcroft-Walton Voltage Multiplier

Rajaei, Amirhossein; Shahparasti, Mahdi; Nabinejad, Ali; Niazi, Yousef; Guerrero, Josep M.

doi:10.1109/ojpel.2021.3128066

Cited by 5 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The expected voltage gain of the ML converter at duty ratios k 1 = 0.35 and k 2 = 0.25 is calculated by using (24) which is equal to 11.29. Figure 18a shows the obtained waveform of v out , v in , i L , and i out , where the input voltage is 40 V. It can be observed that the inductor L current is increased in mode-I and -II, decreased to zero in mode-III, and remains zero till the start of the next mode-I.…”

Section: Discontinuous Conduction Mode Validation-simulation Resultsmentioning

confidence: 99%

“…Moreover, the current and voltage ratings of the components and devices also need to be higher as the total number of stages increases. Revolution in converter research leads to the invention of the switched capacitor converters as a replacement for the cascaded converters, which can provide both step-up/down voltage conversion ratios [23,24]. In the conventional switched capacitor method, generally, the number of active switches (two or more for one capacitor) is greater to charge the capacitor and discharge the capacitor into the load.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New Multi-Leg Converter for DC Microgrid with Two Duty Cycles

Bhaskar

Almakhles

2022

Processes

View full text Add to dashboard Cite

In recent times, important contributions and the incorporation of renewable sources, such as photovoltaic, fuel cells, etc., are the main reasons for the popularity of DC microgrids. Integrating renewable sources into the microgrid requires high-voltage, high-efficiency DC-to-DC converters. Without modification, traditional converters are not suitable for achieving the required voltage in microgrid applications, due to the requirement for a large duty cycle, inductor resistance, voltage rating of switches, reverse recovery of the diode, high current rating inductors, etc. Various converters based on the circuitry of voltage multipliers, switched inductors/capacitors, coupled inductors, transformers, etc., have been proposed in the literature and have their drawbacks. In this paper, to realize significant voltage gain with two duty cycle controls, a new multi-leg (ML) converter is recommended as a solution for use in DC microgrids. The converter is designed by incorporating multiple legs into the boost converter. The implications of the proposed converter are reduced device voltage stress, small inductors and capacitors, two-duty cycle control, triple mode operation, single-stage conversion, etc. The proposed converter’s power circuits, mode of operation, and design equations of the converter are presented. The non-ideal model of the proposed converter is discussed, and efficiency is analyzed. The effect of unequal insurance on the operation of the converter is discussed. Comparative studies of converters are provided to draw attention to the benefits of the converter. The results of the experiments are shown to prove that the analysis and performance of the converter are correct. The discontinuous mode of operation and unequal inductance case of the converter are studied with the help of a simulation model.

show abstract

Section: Discontinuous Conduction Mode Validation-simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New Multi-Leg Converter for DC Microgrid with Two Duty Cycles

Bhaskar

Almakhles

2022

Processes

View full text Add to dashboard Cite

show abstract

“…𝑐𝑜𝑠(𝜃 1 ) + 𝑐𝑜𝑠(𝜃 2 ) + 𝑐𝑜𝑠(𝜃 3 ) + 𝑐𝑜𝑠(𝜃 4 ) +𝑐𝑜𝑠(𝜃 5 ) + 𝑐𝑜𝑠(𝜃 6 )=6𝑚 𝑎 𝑐𝑜𝑠(3𝜃 1 ) + 𝑐𝑜𝑠(3𝜃 2 ) + ⋯ + 𝑐𝑜𝑠(3𝜃 6 ) = 0 … … … … = 0 𝑐𝑜𝑠(13𝜃 1 ) + 𝑐𝑜𝑠(13𝜃 2 ) + ⋯ + 𝑐𝑜𝑠(13𝜃 6 ) = 0 (17) Eventually, for different modulation coefficient of 𝑚 𝑎 , different conducting angles can be obtained. THD is calculated based on the following equation [12]:…”

Section: Modulation Strategymentioning

confidence: 99%

“…Switched-capacitor (SC) multi-level inverters are proposed as a solution to address the mentioned problems for conventional MLIs and reduced device count methods [16], [17]. These inverters use capacitors as a substitute for DC voltage sources and have advantages such as high-power density and high voltage gain.…”

Section: Introductionmentioning

confidence: 99%

“…SCMLIs have many practical applications, such as battery charge stabilization, high voltage gain converters, renewable energy systems, fuel cells, energy harvesting, Internet of Things (IoT) systems, and electric cars (EVs) [16], [17]. However, there is still room for improvement in terms of reducing voltage stress on components, reducing input current spikes, and improving voltage gain and output voltage control.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Switched-Capacitor Multi-Level Inverter With Variable Voltage Gain Based on Current-Fed Dickson Voltage Multiplier

Niazi,

Rajaei,

Tehrani

et al. 2023

IEEE Access

Self Cite

View full text Add to dashboard Cite

A voltage boost switched-capacitor multi-level inverter (SCMLI) structure is planned which is able to control the voltage gain. The structure is based on Current-fed Dickson Voltage Multiplier (CFDVM). The CFDVM at the input stage limits the capacitor peak current and increases the voltage gain compared to other SCMLIs. Furthermore, high frequency operation significantly reduces the size of capacitors. The other main advantage is the same output impedance at all the voltage levels due to similar capacitor values and output current path. Selective Harmonic Elimination (SHE) technique is applied to improve output power quality. The operation principles and modulation strategy are described and the converter relations are derived. Also, the relations for component selection, capacitor voltage ripple and system efficiency are included. Comparative research of the suggested converter with similar state of the art converters is provided which shows that the proposed SCMLI has fewer power switches, gate drivers, and voltage sources. Furthermore, analysis of the cost function shows the economic nature of the proposed SCMLI. A 13-level laboratory prototype is built to verify the effectiveness of the suggested SCMLI.INDEX TERMS Multi-level inverter, Switched-capacitor converter, Dickson voltage multiplier.

show abstract

Dynamic performance analysis of DC–DC boost converter with one- and two-voltage multiplier cells for high voltage gain and voltage regulation

Appikonda,

Kaliaperumal

2024

Electr Eng

View full text Add to dashboard Cite

Switching Strategy Development, Dynamic Model, and Small Signal Analysis of Current-Fed Cockcroft-Walton Voltage Multiplier

Cited by 5 publications

References 22 publications

New Multi-Leg Converter for DC Microgrid with Two Duty Cycles

New Multi-Leg Converter for DC Microgrid with Two Duty Cycles

A Switched-Capacitor Multi-Level Inverter With Variable Voltage Gain Based on Current-Fed Dickson Voltage Multiplier

Dynamic performance analysis of DC–DC boost converter with one- and two-voltage multiplier cells for high voltage gain and voltage regulation

Contact Info

Product

Resources

About