High Step-Up 3-Phase Rectifier with Fly-Back Cells and Switched Capacitors for Small-Scaled Wind Generation Systems

Wang, Yifeng; Yang, Lu; Wang, Chengshan; Li, Wei; Qie, Wei; Tu, Shijie

doi:10.3390/en8042742

Cited by 13 publications

(10 citation statements)

References 33 publications

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“…The system is difficult to use for analyses (eight differential equations and 16 topologies) and is less efficient than the converter presented in [17]. In a similar vein, a converter coupling several cells of flyback converters with switched capacitors was proposed in [16,21] Although this application considerably increases the voltage, the model is complex for the same reasons noted above, and its analysis and control design are difficult to use.…”

Section: Introductionmentioning

confidence: 99%

Slope Compensation Design for a Peak Current-Mode Controlled Boost-Flyback Converter

et al. 2018

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Peak current-mode control is widely used in power converters and involves the use of an external compensation ramp to suppress undesired behaviors and to enhance the stability range of the Period-1 orbit. A boost converter uses an analytical expression to find a compensation ramp; however, other more complex converters do not use such an expression, and the corresponding compensation ramp must be computed using complex mechanisms. A boost-flyback converter is a power converter with coupled inductors. In addition to its high efficiency and high voltage gains, this converter reduces voltage stress acting on semiconductor devices and thus offers many benefits as a converter. This paper presents an analytical expression for computing the value of a compensation ramp for a peak current-mode controlled boost-flyback converter using its simplified model. Formula results are compared to analytical results based on a monodromy matrix with numerical results using bifurcations diagrams and with experimental results using a lab prototype of 100 W.

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Section: Introductionmentioning

confidence: 99%

Slope Compensation Design for a Peak Current-Mode Controlled Boost-Flyback Converter

et al. 2018

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“…This converter is composed by four semiconductors and eight energy storage elements, which difficulties the analysis, and also reports lower efficiencies than the converter studied in [3]. In [2,7], it is proposed the coupling of one or several cells of flyback converters with switched capacitors. Although these applications considerably increase the voltages, the complexity of the model is high, due to the great number of semiconductors and energy storage elements.…”

Section: Introductionmentioning

confidence: 99%

Slope Compensation Design for a Peak Current-Mode Controlled Boost-Flyback Converter

Muñoz¹,

Gallo²,

Angulo³

et al. 2018

Preprint

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Power converters with coupled inductors are very promising due to the high efficiency and high voltage gain. Apart from the aforementioned advantages, the boost-flyback converter reduces the voltage stress on the semiconductors. However, to obtain good performance with high voltage gains, the controller must include two control loops (current and voltage), and a compensation ramp. One of the most used control techniques for power converters is the peak current-mode control with compensation ramp. However, in the case of a boost-flyback converter there is no mathematical expression in the literature, to compute the slope of the compensation ramp. In this paper, a formula to compute the slope of the compensation ramp is proposed in such a way that a stable period-1 orbit is obtained. This formula is based on the values of the circuit parameters, such as inductances, capacitances, input voltage, switching frequency and includes some assumptions related to internal resistances, output voltages, and some other electrical properties related with the physical construction of the circuit. The formula is verified numerically using the saltation matrix and experimentally using a test circuit.

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“…In [10,11], the switched capacitor based converter is applied to a battery management system to decrease the system size and to solve the problem of the flat voltage curve of some types of lithium-ion batteries. In [12], a switched capacitor based AC-DC converter suitable for small-scale wind power generation systems is proposed to obtain both rectification and high voltage gain.…”

Section: Introductionmentioning

confidence: 99%

A Switched Capacitor Based AC/DC Resonant Converter for High Frequency AC Power Generation

Cheng

2015

Energies

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Abstract:A switched capacitor based AC-DC resonant power converter is proposed for high frequency power generation output conversion. This converter is suitable for small scale, high frequency wind power generation. It has a high conversion ratio to provide a step down from high voltage to low voltage for easy use. The voltage conversion ratio of conventional switched capacitor power converters is fixed to n, 1/n or −1/n (n is the switched capacitor cell). In this paper, A circuit which can provide n, 1/n and 2n/m of the voltage conversion ratio is presented (n is stepping up the switched capacitor cell, m is stepping down the switching capacitor cell). The conversion ratio can be changed greatly by using only two switches. A resonant tank is used to assist in zero current switching, and hence the current spike, which usually exists in a classical switching switched capacitor converter, can be eliminated. Both easy operation and efficiency are possible. Principles of operation, computer simulations and experimental results of the proposed circuit are presented. General analysis and design methods are given. The experimental result verifies the theoretical analysis of high frequency AC power generation.

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High Step-Up 3-Phase Rectifier with Fly-Back Cells and Switched Capacitors for Small-Scaled Wind Generation Systems

Cited by 13 publications

References 33 publications

Slope Compensation Design for a Peak Current-Mode Controlled Boost-Flyback Converter

Slope Compensation Design for a Peak Current-Mode Controlled Boost-Flyback Converter

Slope Compensation Design for a Peak Current-Mode Controlled Boost-Flyback Converter

A Switched Capacitor Based AC/DC Resonant Converter for High Frequency AC Power Generation

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