Analysis of the dynamic and steady-state performance of Cockcroft-Walton cascade rectifiers

Bellar, M.D.; Watanabe, Edson H.; Mesquita, A.

doi:10.1109/63.145140

Cited by 72 publications

(18 citation statements)

References 3 publications

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“…5,6,[8][9][10][11][12][13] They are suitable a) Electronic mail: hezifeng@sinap.ac.cn. for calculating 50-Hz driven circuit after considering certain factors.…”

Section: Circuit Designmentioning

confidence: 99%

Characteristics of a symmetrical Cockcroft-Walton power supply of 50 Hz 1.2 MV/50 mA

Zhang

Liu

et al. 2011

Review of Scientific Instruments

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A 1.2 MV∕50 mA symmetrical Cockcroft-Walton (SCW) power supply of over 83% power efficiency, driven by 50 Hz frequency, was developed for an industrial electron beam irradiator. It is constructed by capacitors of 45 nF and 28.13 nF in the coupling column and capacitors of 18.75 nF in the smoothing column. Working status of the rectifier in high power output condition was analyzed, and the conduction angle of the rectifier was calculated. The power factor (PF) of the SCW circuit has been studied, and the equivalent condensance of the circuit has been derived. Measurements were done for the PF compensation. The surge impact during the short circuit transient process was considered in choosing the protection resistance. Test results showed that design specifications of the power supply were achieved, with the non-load voltage being up to 1.32 MV and the ratio of ripple voltage to output voltage as 9.4%.

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“…5,6,[8][9][10][11][12][13] They are suitable a) Electronic mail: hezifeng@sinap.ac.cn. for calculating 50-Hz driven circuit after considering certain factors.…”

Section: Circuit Designmentioning

confidence: 99%

Characteristics of a symmetrical Cockcroft-Walton power supply of 50 Hz 1.2 MV/50 mA

Zhang

Liu

et al. 2011

Review of Scientific Instruments

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“…The demagnetization process for the inductances L 1 , L m and L o starts. The currents through the inductances are given by (16), (17) and (18), respectively. The current in diode D b is given by (19) …”

Section: Stage 1 or Magnetizing Stage -[mentioning

confidence: 99%

“…Another high step up approach is based on the introduction of a kind of voltage multiplier bridge [16] to the standard DC-DC converter. Such topologies are somewhat derived from the Cockcroft-Walton voltage multiplier for High-Voltage Generators.…”

Section: Introductionmentioning

confidence: 99%

Very high voltage step-up Integrated Quadratic-Boost-Zeta converter

Andrade

Schuch

Martins

2015

2015 IEEE 24th International Symposium on Industrial Electronics (ISIE)

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This paper proposes an analysis of a high step-up DC/DC converter named Integrated Quadratic-Boost-Zeta converter. It is based on the combination of two well-known DC/DC converter circuits, the Isolated Zeta converter and the Quadratic-Boost converter. The aim of this paper is to analyze the voltage static gain, the voltage and current stresses on the components of the converter as well as its main features. Additionally, the derivation for three different alternative topologies is presented and their principles of operation, features and limitations are discussed. Experimental results obtained from a laboratory prototype rated at 250W and 100 kHz prove the feasibility and reliability of the proposed converters.

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“…Unfortunately, the boost topology cannot achieve a very high voltage gain in practical applications, because the extremely high duty cycle is unpractical. Therefore, in some high voltage applications, for example, X-ray medical/industry equipment, HVDC system insulator testing, electrostatic precipitators and high voltage battery charger, the boost PFC converter is a poor candidate, especially for the universal line [4,5].…”

Section: Introductionmentioning

confidence: 99%

A New Bridgeless High Step-up Voltage Gain PFC Converter with Reduced Conduction Losses and Low Voltage Stress

Lin

Wang

2018

Energies

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Bridgeless power factor correction (PFC) converters have a reduced number of semiconductors in the current flowing path, contributing to low conduction losses. In this paper, a new bridgeless high step-up voltage gain PFC converter is proposed, analyzed and validated for high voltage applications. Compared to its conventional counterpart, the input rectifier bridge in the proposed bridgeless PFC converter is completely eliminated. As a result, its conduction losses are reduced. Also, the current flowing through the power switches in the proposed bridgeless PFC converter is only half of the current flowing through the rectifier diodes in its conventional counterpart, therefore, the conduction losses can be further improved. Moreover, in the proposed bridgeless PFC converter, not only the voltage stress of power switches is lower than the output voltage, but the voltage stress of the output diodes is lower than the conventional counterpart. In addition, this proposed bridgeless PFC converter features a simple circuit structure and high PFC performance. Finally, the proposed bridgeless PFC converter is analyzed and designed in the discontinuous conduction mode (DCM). The simulation results are presented to verify the effectiveness of the proposed bridgeless PFC converter.For outputting high voltage, many conventional high step-up voltage gain PFC converters have been studied in the past decade [6][7][8][9][10][11][12][13][14][15][16]. Based on the Cockcroft-Walton (CW) structure, some high step-up voltage gain PFC converters were proposed in [6][7][8][9][10]. In [6], a three-stage CW PFC converter was proposed. This converter can achieve a high output voltage and a high PFC performance. In [7], a transformerless hybrid boost and CW PFC converter was presented. By adding the CW voltage multiplier (VM) stages, high output voltage and high power factor are obtained. A single-phase single-stage high step-up matrix PFC converter using CW-VM was proposed in [8]. By combining a four bidirectional-switch matrix converter and the CW-VM, a high step-up voltage gain is achieved. Based on [6], a more comprehensive analysis and validation were presented in [9]. Based on [9], an improved high step-up voltage gain PFC converter with soft-switching characteristic was introduced in [10]. Besides the CW structure, some efforts focused on the switched-capacitor PFC topology to produce the high output voltage [11][12][13]. In [11], a family of high-voltage gain hybrid switched-capacitor PFC converters were proposed and validated, which can achieve a high output voltage and good PFC performance. A high voltage gain PFC converter based on a hybrid boost DC-DC converter was presented in [12]. By integrating boost topology and the switched-capacitor voltage doubler, a high output voltage and nearly unity PF are produced. In [13], a hybrid single ended primary inductor converter (SEPIC) PFC converter using switched-capacitor voltage doubler was proposed, which also owns a high voltage gain and a good PFC performance. Other new PFC converter...

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Analysis of the dynamic and steady-state performance of Cockcroft-Walton cascade rectifiers

Cited by 72 publications

References 3 publications

Characteristics of a symmetrical Cockcroft-Walton power supply of 50 Hz 1.2 MV/50 mA

Characteristics of a symmetrical Cockcroft-Walton power supply of 50 Hz 1.2 MV/50 mA

Very high voltage step-up Integrated Quadratic-Boost-Zeta converter

A New Bridgeless High Step-up Voltage Gain PFC Converter with Reduced Conduction Losses and Low Voltage Stress

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