A variable frequency soft switching boost-flyback converter for high step-up applications

Wu, Hongfei; Xing, Yan; Sun, Kai; Ma, Xudong

doi:10.1109/ecce.2011.6064309

Cited by 9 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A boost-flyback converter includes two capacitors, two coupled inductors, two diodes and one MOSFET such that the designer may use four differential equations and eight potential topologies. The efficiency and voltage gain were improved in [30,31], by adding other primary and secondary coils, leading to the same problems described above. In a similar way, the efficenciy was improved for gains greater than eight by adding switched coupled inductors, rendering the system more complex [32].…”

Section: Introductionmentioning

confidence: 94%

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

et al. 2018

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 94%

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

et al. 2018

View full text Add to dashboard Cite

show abstract

“…DC collection, which avoids charging current issues, has attracted a lot of attention in non‐conventional energy generation like wind or PV generation system [1, 2]. High‐efficiency DC/DC converters with high and variable voltage gain play a significant role in the DC collection, which is still an attention of many researchers [3, 4].…”

Section: Introductionmentioning

confidence: 99%

Comparison of boost and LLC converter and active clamp isolated full‐bridge boost converter for photovoltaic DC system

Liu

Zheng

Wang

et al. 2018

J. eng.

View full text Add to dashboard Cite

“…Since its appearance, the boost-flyback converter has been progressively improved: in [10], it is shown that the best efficiency is achieved when the turns ratio between the coupled coils is equal to two. In [11,12], it was shown that efficiency and voltage gain can be improved adding other primary and secondary coils. In [13], efficiency of the converter is improved for gains greater than eight by adding a switched coupled inductor.…”

Section: Introductionmentioning

confidence: 99%

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

Muñoz¹,

Gallo²,

Angulo³

et al. 2018

Preprint

View full text Add to dashboard Cite

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.

show abstract

A variable frequency soft switching boost-flyback converter for high step-up applications

Cited by 9 publications

References 12 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

Comparison of boost and LLC converter and active clamp isolated full‐bridge boost converter for photovoltaic DC system

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

Contact Info

Product

Resources

About