Output Voltage Ripple Reduction in a Symmetric Multistage-Stacked Boost Architecture (MSBA) Converter

Julio C Rosas-Caro

doi:10.3390/electronics10040394

Abstract

This article proposes a different operation mode in a recently proposed converter, the multistage-stacked boost architecture (MSBA) converter working under the symmetric operation mode. The operation mode of the converter is analyzed with a modified pulse width modulation (PWM) scheme, in which the switching function of transistors is obtained from an interleaved scheme. The results show that the modified PWM results in a similar operation of the converter, with a reduced output voltage ripple, without increasing the switching frequency. A mathematical model of the converter is provided, the output voltage ripple calculation is performed in the traditional, and the modified PWM scheme, simulation, and experimental results are provided to verify the operation mode and the obtained equations.

Highlights

The power electronics field is related to the electrical energy transformation through electronic components; one of their specific fields is the development of large voltage gain dc–dc converters [1], which are important in renewable energy generation systems and other environmentally friendly applications [2], for example, in photovoltaic (PV) panels or fuel cells (FCs), in which the dc voltage that comes from the PV panel or the FC, must be increased from some dozens of volts to some hundreds of volts
multistage-stacked boost architecture (MSBA) converter working under symmetric operation mode, and it proposes a new opcurrent ripple in converters
This article analyzed the operation mode of the multistage-stacked boost architecture (MSBA) converter working under symmetric operation and proposed their operaThis article analyzed the operation mode of the multistage-stacked boost architecture tion with a modified pulse width modulation (PWM) scheme

Summary

Introduction

The power electronics field is related to the electrical energy transformation through electronic components; one of their specific fields is the development of large voltage gain dc–dc converters [1], which are important in renewable energy generation systems and other environmentally friendly applications [2], for example, in photovoltaic (PV) panels or fuel cells (FCs), in which the dc voltage that comes from the PV panel or the FC, must be increased from some dozens of volts to some hundreds of volts.There are traditional topologies, such as the buck, boost, or buck–boost converter, some of them has the capability to increase the input voltage, but the required voltage gain can be too large for traditional topologies [3], manufacturers of integrated circuits for the control of power converters, usually do not warranty their circuits can work with duty cycles larger than 0.75 or 0.8, which would limit the operation of traditional converters to voltage-gains of around five [3] (the definition of duty cycle and their relation to voltage gain will be further explained).A solution to achieve a large voltage gain is the use of transformers or coupled inductors [1], but transformer-less converters can be manufactured with available commercial components (off-the-shelves), which make them attractive, while magnetic-coupling based converters, based for example on transformers or coupled inductors, usually require the magnetic component to be designed in a custom manner. The power electronics field is related to the electrical energy transformation through electronic components; one of their specific fields is the development of large voltage gain dc–dc converters [1], which are important in renewable energy generation systems and other environmentally friendly applications [2], for example, in photovoltaic (PV) panels or fuel cells (FCs), in which the dc voltage that comes from the PV panel or the FC, must be increased from some dozens of volts to some hundreds of volts. Other solutions to achieve large voltage gain are the use of voltage multipliers combined with traditional converters [4,5,6], or quadratic topologies [7,8]

Methods

Results

Conclusion