Query: Performance Analysis of Non-Isolated DC-DC Boost Converter

Candidate papers:

abstract: High step up DC DC converters are increasingly required in many industrial applications. Conventional topologies operate at extreme duty cycle, high semiconductor voltage stress, switching loss, and diode reverse recovery problems. This study presents a new non isolated high gain, boost converter operating with a modest duty cycle by integrating a coupled inductor and switched capacitor technique. Importantly, the structure of the high voltage side, together with the switched capacitor, reduces the voltage stress of the power switch to less than one third of the output voltage, which in turn helps to reduce the conduction loss by using a low on resistance (R ds on switch. The diode voltage stress is less than the output voltage which facilitates faster recovery. Furthermore, the converter employs a passive clamp circuit to recycle the leakage energy. The main switch achieves zero current switching (ZCS) turn on performance and all diodes achieve (ZCS) turn off reducing reverse recovery related losses. As a result, the circuit exhibits high efficiency performance; which is essential for most modern power electronic applications. In this study, the operational principle and performance characteristics of the proposed converter is presented and validated experimentally with a 250 W, 20V input voltage/190V output voltage prototype circuit.
author_names: Musbahu Muhammad

Matthew Armstrong

Mohammed A Elgendy
title: Analysis and implementation of high gain non isolated DC DC boost converter
year: 2017

abstract: In this paper a non isolated dc dc boost converter is described having high voltage gain ability. The proposed high gain boost converter, unlike the conventional boost converter offers high voltage conversion at low duty ratio, thus have high comparative efficiency. The proposed dc dc boost converter is based on the voltage lift (VL) technique, in which input voltage is boosted in step by step manner. A detailed analysis of proposed boost dc dc converter for non ideal model is presented. The performance of proposed converter is compared with the conventional boost converter in term of different parameters, viz. number of elements, voltage gain ratio, and switch stress. The proposed dc dc converter has advantages over conventional one and is suitable for renewable energy resources (RES) applications, especially solar and wind energy. The results obtained both for proposed and conventional converters in MATLAB(r)/Simulink environment is validated through the lab scaled developed prototype.
author_names: Nazia Rahman

Umme Aiman

Md Shahbaz Alam

Mohd Rizwan Khalid

Adil Sarwar

Mohammad Syed Jamil Asghar
title: A Non Isolated DC DC Boost Converter with High Gain Ability for Renewable Energy Sources Applications
venue: 2020 International Conference on Decision Aid Sciences and Application (DASA)
year: 2020

abstract: This article introduces "A high voltage gain non isolated DC DC converter based on inductors for Microgrid application." This converter presents high voltage gain without penalty of high duty ratio. The presented converter employs two single inductors, both are charging in parallel and discharging in series. The steady state analysis of proposed converter is shown in section IV. The simulation of proposed converter 17V/182V is developed in MATLAB Simulink to check the feasibility and performance of the converter.
author_names: Vishwesh Anand Sahasrabudhe

Swapnil Y Gadgune

Viraj B Savakhande
title: Implementation of Non isolated DC DC Boost Converter based on Inductor for DC Microgrid Application
venue: 2019 International Conference on Communication and Electronics Systems (ICCES)
year: 2019

abstract: In this paper, a non isolated multi input multi output dc dc boost converter is proposed. This converter is used to implant alternative energy sources in electric vehicles. However, advantages of different sources of energy are achievable by the implant energy sources. This converter has many outputs with different voltage levels, which can be interfaced with multilevel inverters. In this converter, the load power can be distributed flexibly between input sources, so that a proper control for charging and discharging of energy storages by other input sources can be achieved in a better manner. Using a multilevel inverter can lead to reduction of voltage harmonics, which in turn, reduces the torque ripple of electric motors in electric vehicles. A Small signal model for each operation mode is extracted to design the converter control system. A unique sliding mode control with output filter in a smooth manner is used to regulate the bidirectional converter. By using this control strategy stability analysis can be made for both the step up and step down operating modes of the converter. In this paper the two types of bidirectional dc dc converters cascade buck boost capacitor in the middle and cascade buck boost inductor in the middle are compared and their performance is analyzed based on the parameters such as requirements of devices, switches and components rating, control strategy, and performance analysis for use in plug in electric and hybrid electric vehicles. The simulation and experimental results are provided for both converter types and the validity of the proposed converter and its stability and the control performance are verified for different operating conditions. Keyword: Cascaded buck boost; DC DC converters; electric vehicle; hybrid power system; multi input multioutput (MIMO) small signal modeling;
author_names: J Ramprabu

K Deepa
title: Performance Analysis of a Seamless Sliding Mode Control for a Non Isolated Multi Input Multi Output Bidirectional Dc Dc Boost Converter for Electric Vehicle Applications
year: 2016

abstract: This paper presents a low switching loss non isolated DC DC buck boost converter with zero current switching characteristics. The proposed circuit uses the quasi resonance method for both buck and boost operations with controlled complexity of auxiliary circuit. Both theoretical analysis and simulink simulations verify the zero current switching characteristics under PWM working state. Results show that in the buck operation, switching loss accounts for less than 0.1%0 of the total power; in the boost operation, switching loss accounts for 1.87%0. In addition, simulated voltage and current waveforms of critical parameters are in good agreement with theoretical predictions. The performance of the proposed circuit is conducive for achieving smaller and highly efficient DC DC converters.
author_names: Jiarong Han

Feng Li

Jiapeng Zheng

Zhangxiong Chen

Ling Bu

Lei Song
title: Low Switching Loss Non isolated DC DC Buck Boost Converter with ZCS Characteristics
venue: 2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA)
year: 2019

abstract: High efficiency is an important requirement from DC DC converter in DC microgrid system when integrated with renewable energy sources. This study proposes a new tri switching state non isolated high gain boost converter for 400 V DC microgrid applications. The proposed converter developed by modifying the conventional boost converter with advantageous features such as; high voltage gain operation with two different duty pulses to overcome the restriction of high duty ratio and continuous input current. Moreover, semiconductor components in the proposed converter are subjected to reduced voltage stress for a shorter duration when compared to conventional existing topologies. Steady state (with and without non idealities consideration) and performance analysis are presented to validate the viability of the proposed converter for high gain operation in grid connected systems. For experimental validation, a prototype model of the proposed converter is developed for 31 V/400 V, 500 W and operated at 50 kHz switching frequency. The converter is tested for a power range of 100 500 W for two different duty range (case: 1 k 1 kept fixed and k 2 is varied, case: 2 k 2 kept fixed and k 1 is varied) to validate the consistency in output voltage. Hardware results obtained validates superior performance and higher efficiency compared to conventional existing topologies.
author_names: Pandav Kiran Maroti

Rashid A Alammari

Mahajan Sagar Bhaskar

Mohammad Meraj

Atif Iqbal

Sanjeevikumar Padmanaban

Syed Rahman
title: New tri switching state non isolated high gain DC DC boost converter for microgrid application
venue: IET Power Electronics
year: 2019

abstract: ABSTRACT This paper proposes a transformerless/non isolated, high gain DC DC converter required to increase low voltages in renewable energy applications. The converter topology uses only a single switch with minimum voltage stress over the semiconductors. The design is obtained by integrating both the boost and the quadratic boost converter topology. Operating principles of the converter circuit topology are detailed, and the steady state performance is analysed. The design results in lower switching voltage that significantly improves the efficiency of the controlled switches. The results obtained by computer simulation demonstrate that the high voltage gain is obtained at lower values of duty ratio with an efficiency of more than 94% The merits of the proposed converter are given in comparison with other high gain DC DC converters. Finally, a laboratory model is built using the digital signal processor [dSPACE (DS 1104) to verify the converter theory. The theoretical, simulation and experimental results that indicate the claimed converter performance and capability are given.
author_names: Hussein M Waly

Dina S M Osheba

Haitham Z Azazi

Awad E El-Sabbe
title: Design and analysis of a proposed transformerless/non isolated high gain DC DC converter for renewable energy applications
year: 2020

abstract: Summary In this paper, a simple non isolated multiple input (MI) bidirectional DC DC topology is proposed which can operate in buck, boost, or buck boost modes. The proposed topology utilizes a battery pack to realize the bidirectional power flow operation especially when the input sources are non storable ones. The excess energy of input sources can be stored in the battery and be injected to the load, when required. Simultaneous or independent power transfer of input sources is also provided. For better evaluation, the proposed topology has been compared with several recently presented novel topologies, from view point of number of inductors, capacitors, switches, and diodes. Comparison results show that the proposed topology utilizes less number of components (switches, inductors, capacitors, and current sensors) which can reduce the size, cost, and complexity of converter. Different operational modes of the proposed topology (unidirectional buck, boost, buck boost modes, and bidirectional mode) have been presented. Also, boost mode of the proposed topology has been investigated in detail, from design point of view, and generalized relationships have been proposed for calculation of critical inductance (CI) and output voltage ripple (OVR) of proposed n input boost topology. To validate proposed theoretical concepts, the proposed topology has been modeled and simulated in PSCAD/EMTDC software, and the 3 input boost version has been experimentally implemented. Simulation and experimental results confirm appropriate performance of the proposed topology.
author_names: Kazem Varesi

Seyed Hossein Hosseini

Mehran Sabahi

Ebrahim Babaei
title: Performance analysis and calculation of critical inductance and output voltage ripple of a simple non isolated multi input bidirectional DC DC converter
venue: Int. J. Circuit Theory Appl.
year: 2018

abstract: Abstract Fuel cell power conditioners often require high step up voltage gains to accommodate low input fuel cell voltages into high voltage busses. Traditional non isolated DC DC boost converters are unable to offer such as gains because of several parasitic elements and non ideal behaviour of power semiconductors and driving circuits. Moreover, paralleled converters are also desirable to simplify power up scaling and to reduce input/output current ripples. In this context, a very versatile non isolated, high step up voltage gain, interleaved boost converter is presented in this work. Steady state analysis, simulation and evaluation of different converter structures are discussed in detail. Finally, a 500 W experimental prototype for Nexa Ballard 1.2 kW fuel cell specifications has been implemented and tested to verify the performance.
author_names: Ausias Garrigos

David Marroqui

A Garcia

J M Blanes

Roberto Gutierrez
title: Interleaved, switched inductor, multi phase, multi device DC/DC boost converter for non isolated and high conversion ratio fuel cell applications
venue: International Journal of Hydrogen Energy
year: 2019

abstract: A new transformer less buck boost converter is proposed, which owns a quadratic voltage gain ratio. The proposed converter (a) has only one active switch, which makes the implementation of the gate driver and control system simpler; (b) has a quadratic voltage gain without using a transformer, which equips the designers to obtain a high voltage gain ratio and avoid the complexity of magnetic utilisations; (c) works both in step up or step down mode, while most of the existing quadratic topologies are able to work either in step up or step down mode; and (d) shares a common ground between the input and output terminals. The operating states of the proposed converter along with its steady state performance are analysed. Then, the small signal modelling and the power loss analysis are performed. A comparison shows the unique features of the converter, specifically in terms of voltage gain ratio and the count of power switches. Finally, the experimental results of a laboratory prototype, as well as the simulation results from PSIM software, are used for validation. The converter was tested in different conditions to inspect its transient response and to record its efficiency. The maximum recorded efficiencies in boost and buck modes, respectively were 94.7 and 93%
author_names: Saman A Gorji

Ali Mostaan

Hung Tran My

Mehran Ektesabi
title: Non isolated buck boost dc dc converter with quadratic voltage gain ratio
venue: IET Power Electronics
year: 2019