Characteristic Improvement of a Bridgeless PFC Converter by using SiC SBDs Joon-Hyeok Jeon, Sin-Su Kyoung, Hee-Jun Kim Powercubesemi, Inc., Hanyang University

 

Characteristic Improvement of a Bridgeless PFC Converter by using SiC SBDs Joon-Hyeok Jeon, Sin-Su Kyoung, Hee-Jun Kim Powercubesemi, Inc.*, Hanyang University 

Abstract – This paper is a Bridgeless PFC with SiC SBD It is about improving the characteristics of the converter, using the topology characteristics The characteristics of SiC SBD were applied to the maximum. SiC SBD reverse recovery It has been verified that there is almost no loss, and this results in Improvement, achieved 94.58% maximum efficiency and 0.99 high power factor By doing so, it was confirmed that the characteristics of the converter were improved.

LINK: http://apeclab.hanyang.ac.kr/home/publication/pub_down.php?num=216

Review:Uninterruptible Power Supply(UPS)System Muhammad Aamir,Kafeel Ahmed Kalwar,Saad Mekhilef Power Electronics and Renewable Energy Research Laboratory(PEARL),Department of Electrical Engineering,University of Malaya,Kuala Lumpur Malaysia

 

Review:Uninterruptible Power Supply(UPS)system Muhammad Aamir,Kafeel Ahmed Kalwar,Saad Mekhilef Power Electronics and Renewable Energy Research Laboratory(PEARL),

Department of Electrical Engineering,University of Malaya,Kuala Lumpur Malaysia 

 ABSTRACT 

Uninterruptible Power Supplies (UPS) have reached a mature level by providing clean and uninterruptible power to the sensitive loads in all grid conditions. Generally UPS system provides regulated sinusoidal output voltage, with low total harmonics distortion (THD), and high input power factor irrespective of the changes in the grid voltage. This paper provides comprehensive review of UPS topologies, circuit configurations, and different control techniques used in the UPS system. A comparison based on the performance, size, cost, and efficiency of the system is presented. Different hybrid energy source UPS system and new generation UPS system for smart grid and micro-grid has been explained. Finally the paper describes performance evaluation of UPS system and explains different aspects that are to be considered for choosing a suitable UPS system by the user.

LINK:

https://www.sciencedirect.com/science/article/pii/S1364032115017189/pdfft?casa_token=CAhGpV1vf0kAAAAA:qIINtvDCKQuVUla54P-Fi2MRpu-XzgfpeetZatBYFAfAgrlzGLvM1crzA_T6mOpjXFjhy8rgxqXv&md5=3018776ba9a1c27100329454b265708b&pid=1-s2.0-S1364032115017189-main.pdf

LINK FULL PAPER:

 https://umexpert.um.edu.my/public_view.php?type=publication&row=NTEzNzU%3D

DESENVOLVIMENTO DE UPS TRIFASICA DE ALTO RENDIMENTO UTILIZANDO MOSFETS DE CARBONETO DE SILICIO AUTOR WENDELL DA CUNHA ALVES PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA ELETRICA UNIVERSIDADE FEDERAL DE MINAS GERAIS BRASIL

Resumo 

Com o constante aumento do consumo de energia no mundo, a eficiência dos sistemas e equipamentos está se tornando cada vez mais importante. A UPS é um equipamento que fornece alimentação segura e confiável para sistemas de carga crítica, ou seja, sistemas em que uma interrupção do fornecimento pode levar a perdas econômicas ou até mesmo humanas. A UPS de dupla conversão é a classe UPS mais completa em termos de proteção da carga, regulação, desempenho e confiabilidade, no entanto, tem menor rendimento e maior custo por causa de seu elevado número de conversores eletrônicos de energia. Os dispositivos de Carbeto de Silício estão emergindo como uma oportunidade para construir conversores eletrônicos com maior eficiência e maior densidade de potência. O objetivo principal deste trabalho é projetar um conversor trifásico c.a.-c.c.-c.a. usando Carbeto de Silício para aplicações de UPS de dupla conversão. Para maximizar a eficiência e minimizar o custo, uma comparação é feita para guiar a seleção das topologias de conversor utilizadas. A comparação é feita sob duas condições de operação. Ao final da comparação, dois conversores c.a.-c.c.-c.a. com boa relação custo-benefício são propostos, um para cada condição. Em seguida, um dos conversores propostos é projetado, simulado e construído. As metodologias para dimensionar e escolher os principais componentes de hardware são descritas em detalhes. A operação do conversor e sua técnica de controle são validadas por meio de simulações no software PSIM. Os resultados experimentais obtidos com o protótipo comprovam o alto rendimento alcançável com MOSFETs de Carbeto de Silício. 

Palavras-chave: UPS. Carbeto de Silício. Conversores eletrônicos. Projeto. Alto rendimento

LINK:https://www.ppgee.ufmg.br/defesas/1583M.PDF

A SiC MOSFET Based High Efficiency Interleaved Boost Converter for More Electric Aircraft Haider Zaman†, Xiancheng Zheng, Mengxin Yang, Husan Ali, and Xiaohua Wu,School of Automation, Northwestern Polytechnical University, Xi’an, China

A SiC MOSFET Based High Efficiency Interleaved Boost Converter for More Electric Aircraft Haider Zaman†, Xiancheng Zheng*, Mengxin Yang*, Husan Ali*, and Xiaohua Wu* †,*School of Automation, Northwestern Polytechnical University, Xi’an, China

Abstract Silicon Carbide (SiC) MOSFET belongs to the family of wide-band gap devices with inherit property of low switching and conduction losses. The stable operation of SiC MOSFET at higher operating temperatures has invoked the interest of researchers in terms of its application to high power density (HPD) power converters. This paper presents a performance study of SiC MOSFET based two-phase interleaved boost converter (IBC) for regulation of avionics bus voltage in more electric aircraft (MEA). A 450W HPD, IBC has been developed for study, which delivers 28V output voltage when supplied by 24V battery. A gate driver design for SiC MOSFET is presented which ensures the operation of converter at 250kHz switching frequency, reduces the miller current and gate signal ringing. The peak current mode control (PCMC) has been employed for load voltage regulation. The efficiency of SiC MOSFET based IBC converter is compared against Si counterpart. Experimentally obtained efficiency results are presented to show that SiC MOSFET is the device of choice under a heavy load and high switching frequency operation.

Key words: High Power Density (HPD), Interleaved Boost Converter (IBC), More Electrical Aircraft (MEA), Peak Current Mode Control (PCMC), Silicon Carbide (SiC)

LINK:https://jpels.org/digital-library/manuscript/file/15794/03_JPE-17-06-083.pdf

Analysis and Implementation of a New Single Switch, High Voltage Gain DC-DC Converter with a Wide CCM Operation Range and Reduced Components Voltage Stress Babak Honarjoo*, Seyed M. Madani†, Mehdi Niroomand*, and Ehsan Adib

 

Analysis and Implementation of a New Single Switch, High Voltage Gain DC-DC Converter with a Wide CCM Operation Range and Reduced Components Voltage Stress Babak Honarjoo*, Seyed M. Madani†, Mehdi Niroomand*, and Ehsan Adib

Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran

Abstract This paper presents a single switch, high step-up, non-isolated dc-dc converter suitable for renewable energy applications. The proposed converter is composed of a coupled inductor, a passive clamp circuit, a switched capacitor and voltage lift circuits. The passive clamp recovers the leakage inductance energy of the coupled inductor and limits the voltage spike on the switch. The configuration of the passive clamp and switched capacitor circuit increases the voltage gain. A wide continuous conduction mode (CCM) operation range, a low turn ratio for the coupled inductor, low voltage stress on the switch, switch turn on under almost zero current switching (ZCS), low voltage stress on the diodes, leakage inductance energy recovery, high efficiency and a high voltage gain without a large duty cycle are the benefits of this converter. The steady state operation of the converter in the continuous conduction mode (CCM) and discontinuous conduction mode (DCM) is discussed and analyzed. A 200W prototype converter with a 28V input and a 380V output voltage is implemented and tested to verify the theoretical analysis.

Key words: Coupled inductor, High step-up voltage gain, Single switch, Switched capacitor, Low voltage stress

LINK:  https://jpels.org/digital-library/manuscript/file/15793/02_JPE-17-04-091.pdf

INDUSTRIAL UPS WITH WIDE BANDGAP (WBG) POWER TRANSISTOR devices enable smaller, lighter-weight and more efficient systems

Today’s designers are forced to achieve higher power density and higher efficiency, but the standard Silicon topologies are limited in their high frequency operation capabilities. GaN and SiC are more efficient, more thermally stable, and certainly more capable for use in power devices that demand more load or higher frequencies at higher temperatures than Silicon.

Enter a GaN soft-switching transformer-less online UPS topology which enables significant size reduction by operating efficiently at high switching frequencies using GaN power devices. See Figure 5, at right.

The proposed UPS employs standard GaN half-bridge structures with a common-neutral between the input and output and is able to achieve zero-voltage switching (ZVS) operation, in the boundary conduction mode, with no additional complex circuit design. This design employs a new control methodology for the UPS that has a dual-mode digital controller for the input PFC rectifier stage. The digital controller regulates the output voltage of the converter across both resistive and reactive loads.

The inverter (DC/AC) stage is also operated in dual-mode, and a digital controller regulates the output voltage of the converter across resistive and reactive loads. This converter architecture is capable of delivering 1-kVA of output power while maintaining unity power factor at its input. This GaN-based 1-kVA online UPS is operated using the proposed control technique in Reference 1, and is designed, built, and tested. The prototype UPS, operated up to 2MHz, achieved a power density of 26.4W/in3.

References 

1-Control of a GaN-Based High-Power-Density Single-Phase Online Uninterruptible Power Supply, Danish Shahzad, Saad Pervaiz, Nauman Zaffar, Khurram K. Afridi, IEEE 2019

2- Performance Comparison of 1200V Silicon and SiC devices for UPS Application, James McBryde, Arun Kadavelugu, Bobby Compton, Subhashish Bhattacharya, Mrinal Das, Anant Agarwal, IEEE 2010

LINK ORIGINAL:https://gan-sic-power.richardsonrfpd.com/applications/application-industrial-ups/

Go Real: Power Electronics From Simulations to Experiments in Hours Versatile experimental tool for next generation engineers by Qing-Chang Zhong, Yeqin Wang, Yiting Dong, Beibei Ren, and Mohammad Amin

Go Real: Power Electronics From Simulations to Experiments in Hours Versatile experimental tool for next generation engineers by Qing-Chang Zhong, Yeqin Wang, Yiting Dong, Beibei Ren, and Mohammad Amin 

 The only constant is change—power systems worldwide are going through a paradigm change from centralized generation to distributed generation; transportation systems are being electrified; and billions of lives in thirdworld countries are awaiting low-cost sustainable electricity. Control and power electronic technologies are two common enablers to address these grand challenges. Empowering next-generation engineers with hands-on skills in control and power electronics has become a priority for global higher education. However, setting up a suitable experimental system requires time, effort, and a broad range of expertise. This article aims to help researchers, university professors, graduate students, and engineers lower the barriers to go real from simulations to experiments for various power electronic systems and improve the efficiency and productivity of research, development, and education. It shows that it is possible to obtain experimental results within hours after completing simulations by adopting the SYNDEM Smart Grid Research and Educational Kit, which is a reconfigurable, opensource, multifunctional power electronic converter with the capability of directly downloading codes from MATLAB/Simulink. This minimizes the time, cost, and efforts needed to develop hardware systems and re - moves the burden of coding. After briefly introducing the SYNDEM kit and highlighting the automatic code generation capability, two case studies will be illustrated: an ac motor drive and a dc-dc-ac converter for an integrated PV-storage system.

LINK ENCONTRADO EN LA WEB:

https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2020/index.php?startid=52#/p/52

Development of AC–DC Converter with 10V and 10,000A Output for Sintering -Koji Orikawa,Jun-ichi Itoh-Nagaoka University of Technology

 

Development of AC–DC Converter with 10-V and 10,000-A Output for Sintering Koji Orikawa∗ Student Member, Jun-ichi Itoh∗ Member-Nagaoka University of Technology

(Manuscript received Dec. 30, 2011, revised June 3, 2012) IEEJ Journal of Industry Applications Vol.1 No.3 pp.164–171 

 This paper discusses a high-efficiency AC–DC converter developed for implementation under low-voltage and high- current conditions for sintering applications. First, the circuit configuration and the control principle for the proposed low-voltage, high-current AC–DC converter are described. The proposed system consists of four 2,500-A units of the AC–DC converter connected in parallel. The input current harmonics are suppressed by using multiple transformers on the input side. Further, imbalance issues in the transformer parameters and the output wiring are discussed. The proposed system demonstrates that each individual circuit yields a balanced 2,500-A output. In addition, loss analysis shows that the power loss on the secondary rectifier is 49% and is dominated by semiconductor loss. Furthermore, it is shown that by implementing a MOSFET synchronous rectifier, instead of a Schottky barrier diode, the loss reduces by 35%. Finally, the input current harmonics are reduced by using multiple transformers, and the validity of this result is demonstrated.

 Keywords: sintering, low-voltage high-current, synchronous rectifier

LINK:https://www.jstage.jst.go.jp/article/ieejjia/1/3/1_164/_pdf/-char/en

A novel MPPT algorithm considering solar photovoltaic modules and load characteristics for a single stage standalone solar photovoltaic system Hwa-Dong Liu , Chang-Hua Lin , and Shiue-Der Lu-Department of Electrical Engineering, National Taiwan University of Science and Technology

 

A novel MPPT algorithm considering solar photovoltaic modules and load characteristics for a single stage standalone solar photovoltaic system Hwa-Dong Liu , Chang-Hua Lin , and Shiue-Der Lu-Department of Electrical Engineering, National Taiwan University of Science and Technology 

Abstract

 This paper proposes a novel maximum power point tracking (MPPT) algorithm that is combined with the advanced three-point weight comparison method (ATPWC) and MPPT limit detect (LD) mechanism and applied to a single stage standalone solar photovoltaic system. The boost converter is connected to the inverter and filter to deliver single-phase AC 110VAC/60 Hz to the load. The MPPT LD detects when the system does not need MPPT based on the solar photovoltaic module’s (SPV module) Rpv and load Ro. In addition, this study performs actual measurements for validation, in which the proposed algorithm is used in the built single-stage standalone solar photovoltaic system and compared with theATPWC, three- point weight comparison method (TPWC), and conventional perturbation and observation (P&O) for MPPT efficiency. The result shows that the proposed algorithm is better than the other three algorithms. When the system is under a heavy load (Rpv > Ro), the overall system efficiency is 80%, while the efficiency under a non-heavy load (Rpv  Roº is 99%. Keywords: MPPT limit detect, advanced three-point weight comparison method, single stage standalone solar photovoltaic system 

Classification: Power devices and circuits

LINK: https://www.jstage.jst.go.jp/article/elex/17/11/17_17.20200099/_pdf/-char/en

ESS 기능을 갖는 하이브리드 UPS-Hybrid UPS with Energy Storage System Function Seung-Beom Lim✝ and Soon-Chan Hong-School of Electronics and Electrical Engineering, Dankook University

LINK: http://www.koreascience.or.kr/article/JAKO201419553341244.pdf

The Transactions of the Korean Institute of Power Electronics, Vol. 19, No. 3, June 2014

Practical Design Methodology of Dual Active Bridge Converter as Isolated Bi-directional DC-DC Converter for Solid State Transformer Hyun-Jun Choi, Won-Bin Lee, and Jee-Hoon Jung

 Solid State Transformer를 위한 양방향 Dual Active Bridge DC-DC 컨버터의 설계 기법 최현준1, 이원빈1, 정지훈✝

Practical Design Methodology of Dual Active Bridge Converter as Isolated Bi-directional DC-DC Converter for Solid State Transformer Hyun-Jun Choi1, Won-Bin Lee1, and Jee-Hoon Jung

 Abstract 

Proper design guides are proposed for a practical dual-active bridge (DAB) converter based on the mathematical model on the steady state. The DAB converter is popular in bidirectional application due to its zero-voltage capability and easy bidirectional operation for seamless control, high efficiency, and performance. Some design considerations are taken to overcome the limitation of the DAB converter. The practical design methodology of power stage is discussed to minimize the conduction and switching losses of the DAB converter. Small-signal model and frequency response are derived and analyzed based on the generalized average method, which considers equivalent series resistance, to improve the dynamics, stability, and reliability with voltage regulation of the practical DAB converter. The design of closed-loop control is discussed by the derived small-signal model to obtain the pertinent gain and phase margin in steady-state operation. Experimental results of a 3.3 kW prototype of DAB converter demonstrate the validity and effectiveness of the proposed methods. 

Keywords: SST(Solid State Transformer), DAB(Dual Active Bridge) converter, BDC(Bi-Directional Converter), ZVS(Zero Voltage Switching), Small signal model, 2 pole 1 zero(2P1Z) controller

LINK: http://www.itfind.or.kr/admin/getFile.htm?identifier=02-004-170802-000009

Low Cost and High Performance Single Phase UPS Using a Single-Loop Robust Voltage Controller Jun-Keun Ji†, Dae-Kwan Ku*, and Seung-Beom Lim** †Department of Electrical Engineering, Soonchunhyang University, Asan, Korea

Low Cost and High Performance Single Phase UPS Using a Single-Loop Robust Voltage Controller Jun-Keun Ji†, Dae-Kwan Ku*, and Seung-Beom Lim** †

Department of Electrical Engineering, Soonchunhyang University, Asan, Korea *VCTech Co., Ltd., R&D Center, Gunpo, Korea **EON Co., Ltd., R&D Center, Anyang, Korea

 Abstract

 Uninterruptible Power Supplies (UPSs) can be largely divided into the passive-standby, line-interactive and double-conversion methods. This paper proposes a double-conversion UPS with a low cost and high performance. This single phase UPS uses a single-loop robust voltage controller and 1-switch voltage doubler strategy PFC. The proposed UPS is composed of a single phase PFC, a half-bridge inverter, a battery charger and a battery discharger. Finally, the validity of proposed UPS was verified by various experimental tests. Key words: 1-switch voltage doubler strategy PFC, Low cost and high performance, Single phase UPS, Single-loop robust voltage controller 

 LINK  FULL PAPER:

http://www.koreascience.or.kr/article/CFKO201136262564307.page

LINK :Design of Robust Voltage Controller for Single-phase UPS Inverter 단상 UPS 인버터의 강인한 전압제어기 설계 Ku, Dae-Kwan ; Ji, Jun-Keun ; Cha, Guee-Soo ; Moon, Jun-Hee

 http://www.koreascience.or.kr/article/JAKO201128563050510.page

LINK: Hybrid UPS with Energy Storage System Function Seung-Beom Lim✝ and Soon-Chan Hong

http://www.koreascience.or.kr/article/JAKO201419553341244.pdf

3상 UPS(무정전 전원 장치), 갤럭시 VX를 소개합니다! | 슈나이더 일렉트릭 코리아

Research Institute Uninterruptible power supply UPS 75KVA (3Ø 4W 380V) PCB BOARD, IGBT, DC capacitor, AC capacitor, blower fan, fan replacement work.

 

Research Institute Uninterruptible power supply UPS 75KVA (3Ø 4W 380V) PCB BOARD, IGBT, DC capacitor, AC capacitor, blower fan, fan replacement work. 

UPS stands for Uninterruptible Power Supply. It literally serves to supply power without interruption in case of a power outage. It is mainly used for server equipment or other electronic devices that are subject to great damage in the event of a power outage, and large-capacity UPS is often used in hospitals and security equipment large-capacity servers. As a small UPS, it may be used for broadcasting equipment or fire fighting equipment.

How to check the UPS and the need for maintenance?? 

The output voltage of a UPS becomes unstable when the life of the internal capacitors or semiconductor devices of the control board is over. Since the internal parts each have a lifespan and vary depending on the usage environment, maintenance is required to ensure that the UPS can operate normally in an emergency by checking the voltage and the temperature of the condenser during normal times.

Fonte ininterrupta de energia trifásica de alto desempenho sem transformador com dupla funcionalidade do estágio de entrada e sistema de controle digital-Venturini, William Alegranci- Dissertação (Mestrado em Engenharia Elétrica) - Universidade Federal de Santa Maria, Santa Maria, 2016.

 

VENTURINI, William Alegranci. High performance three-phase transformerless uninterruptible power supply with double functionality of the input stage and digital control system. 2016. 222 f. Dissertação (Mestrado em Engenharia Elétrica) - Universidade Federal de Santa Maria, Santa Maria, 2016.

 RESUMO

 Esta dissertação de mestrado propõem uma topologia de fonte ininterrupta de energia (UPS - Uninterruptible Power Supplies) trifásica de dupla conversão sem transformador com custo reduzido e sistema de controle digital. A UPS proposta é composta por um estágio de entrada, um banco de baterias, um inversor, um circuito auxiliar e chaves de transferência. O estágio de entrada assume a função de retificador trifásico com filtro LCL em modo normal de operação da UPS e é responsável pela descarga do banco de baterias em modo bateria de operação. Esta configuração reduz o custo do sistema, pois permite que seja aproveitado um circuito disponível e dimensionado para a potência nominal da UPS para a descarga do banco de baterias. Em topologias convencionais de UPSs de dupla conversão o estágio de entrada permanece ocioso durante este modo de operação e um circuito adicional é empregado para este fim. O circuito auxiliar é formado por um indutor e um braço de interruptores e é utilizado como carregador de baterias em modo normal de operação e adicionalmente é utilizado para realizar o equilíbrio das tensões dos capacitores de barramento em modo bateria. Com esta configuração, o circuito auxiliar pode ser dimensionado para apenas uma fração da potência nominal da UPS, propiciando também a redução do custo total do sistema. As chaves de transferência alteram as configurações do estágio de entrada e do circuito auxiliar de acordo com o modo de operação da UPS. É apresentada a operação detalhada da topologia, a modelagem, a estrutura de controle digital utilizada e os resultados obtidos via simulação. Por fim, um protótipo de 20 kVA é implementado e resultados experimentais são adquiridos para a validação da metodologia de projeto empregada bem como da funcionalidade do circuito proposto.

 LINK:https://repositorio.ufsm.br/bitstream/handle/1/8594/VENTURINI%2c%20WILLIAM%20ALEGRANCI.pdf?sequence=1&isAllowed=y