Is SiC a Game Changer-CPES?-The Center for Power Electronics Systems-TUTORIAL CONGRESSO BRASILEIRO DE POTÊNCIA 2015-COBEP2015-SOUTHERN POWER ELECTRONIC CONFERENCE

 

Abstract

Over the last two decades there has been much exhilaration about the anticipated transformation of power electronics that SiC devices would bring, which has been accompanied by tremendous efforts by governments and companies around the developed world to meet those expectations. The successful commercial use of SiC Schottky diodes over the last ten years has helped improve efficiency and reduce size of power converters in several applications, but only in the last couple of years, several SiC active switching devices became commercially available at reasonable cost and volume. CPES has been involved all along in characterizing the newest SiC devices and evaluating their potential to change existing applications and open completely new ones.

CPES-The Center for Power Electronics Systems (CPES), with annual research expenditures of $6-7 million dollars, is dedicated to improving electrical power processing and distribution that impact systems of all sizes – from battery-operated electronics to vehicles to regional and national electrical distribution systems.

VIEW FULL TUTORIAL:http://www.cobepspec2015.ufc.br/wp-content/uploads/2015/12/t1.pdf

DEVELOPMENT OF 30KVA INVERTER USING SIC MOSFET FOR 180◦C AMBIENT TEMPERATURE OPERATION Feng Qi1, Miao Wang, Longya Xu, Bo Zhao, Zhe Zhou 1The Ohio State University, USA -Smart Grid Research Institute of SGCC, China

DEVELOPMENT OF 30KVA INVERTER USING SIC MOSFET

FOR 180◦C AMBIENT TEMPERATURE OPERATION

Feng Qi1, Miao Wang1, Longya Xu1, Bo Zhao2, Zhe Zhou2

1The Ohio State University, USA

2Smart Grid Research Institute of SGCC, China

COBEP 2015 : 2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC)

Abstract

 A 30kVA SiC MOSFET inverter is developed for 180°C ambient temperature operation.The entire inverter system is designed for high temperature (HT) except the DSP control circuit in room temperature environment. Power structure is designed using SiC MOSFETs, HT capacitors and a liquid cooling plate. The gate drivers with protections and power structure are placed in HT environment of 180○C. The prototype inverter has been built and successfully tested in 180○C environment at 30kVA for accumulative 5 hours without any problems.

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https://www.mediafire.com/file/gpd9w5bf75g7815/DEVELOPMENT+OF+30KVA+INVERTER+USING+SIC+MOSFET550.pdf/file

LLC DC to DC 공진 컨버터의 고주파 변압기 최적화 설계에 관한 연구 A study on an optimal design of the high frequency transformer in LLC DC to DC resonant converter -Jong-Hae Kim

 LLC DC to DC 공진 컨버터의 고주파 변압기 최적화 설계에 관한 연구 A study on an optimal design of the high frequency transformer in LLC DC to DC resonant converter 김 종 해* 

★ Jong-Hae Kim* 

 Abstract 

This paper presents an optimal design of the slim type high frequency transformer used in the LLC DC to DC resonant converter for 65-inch UHD-TV with the rated power of 315W. This paper also performs an optimal design of the slim type high frequency through core loss analysis, AC winding loss analysis, and optimization design of the winding arrangement of the LLC resonant transformer. Particularly, the high-efficiency and slim type high frequency transformer based on the obtained results from theoretical analysis in this paper is constructed in the interleaved and vertical winding structures of its transformer to realize the winding method of automatic type and minimize AC winding loss. The primary and secondary windings of the slim type high frequency transformer the vertical winding structure proposed in this paper used the Litz-wire windings, PCB and copper plate windings, respectively. Finally, an optimal design of the slim type high frequency transformer proposed in this paper was carried out through the experimental results to confirm the validity of theoretical analysis based on the simulation results using Maxwel

j.inst.Korean.electr.electron.eng.Vol.27,No.4,587~600,December 2023 논문번호 23-04-31 https：//doi.org/10.7471/ikeee.2023.27.4.587l 2D and 3D tool.

VIEW FULL TEXT:

https://www.mediafire.com/file/8lztogjj0ey6kdh/A+study+on+an+optimal+design+of+the+high+frequency+transformer+in+LLC+DC+to+DC+resonant+converter.pdf/file

ORIGINAL SOURCE:https://ikeee.jams.or.kr/co/locale.kci?lang=en_US

단상 태양광 발전용 고효율 벅부스트 하프브리지 인버터 A High-efficiency Buck-boost Half-bridge Inverter for Single-phase Photovoltaic Generation-Hyung-Min Ryu

단상 태양광 발전용 고효율 벅부스트 하프브리지 인버터 A High-efficiency Buck-boost Half-bridge Inverter for Single-phase Photovoltaic Generation 류 형 민* ★ Hyung-Min Ryu*

 j.inst.Korean.electr.electron.eng.Vol.27,No.4,450~455,December 2023

 Abstract 

Among single-phase photovoltaic inverters that can avoid excessive leakage current caused by the large parasitic capacitance of photovoltaic panels, a boost converter followed by a half-bridge inverter is the simplest and has the smallest leakage current. However, due to the high DC-link voltage, the rated voltage of the switching devices is high and the switching loss is large. This paper proposes a new circuit topology which can operate as a buck-boost inverter by adding two bidirectional switches to the output side of the half-bridge inverter instead of removing the boost converter. By reducing two stages of power conversion through the high-voltage DC-link to one stage, power loss can be reduced without increasing costs and leakage current. The feasibility of the proposed circuit topology is verified by computer simulation and power loss calculation.

 VIEW FULL TEXT:https://www.mediafire.com/file/k51fa1gx4e6wuv6/A+High-efficiency+Buck-boost+Half-bridge+Inverter+for+Single-phase+Photovoltaic+Generation-Hyung-Min+Ryu.pdf/file

Analysis and design of –PID controller for a quadrotor in the frequency domain- Alhassan Dodo Adamou Soudeize* , Ji-Sun Park* , Ho-Lim Choi*-j.inst.Korean.electr.electron.eng.Vol.28,No.3,253~260,September 2024

 Analysis and design of –PID controller for a quadrotor in the frequency domain Alhassan Dodo Adamou Soudeize*, Ji-Sun Park*, Ho-Lim Choi*

 Abstract 

In this paper, we propose an -PID controller for the altitude control of the quadrotor from the ground by considering the mass of the AR Drone and external disturbance. The first part consists of modeling the quadrotor and carrying out the system analysis with the proposed controller and the second part consists of carrying out the experiment in the lab to show that our control method along with the analysis coincides with the experiment.

 

VIEW FULL PAPER: https://www.mediafire.com/file/79yizbm64eli4sz/Analysis+and+design+of+–PID+controller+for+a+quadrotor+in+the+frequency+domain.pdf/file

Quadcopter stabilization by using PID controllers- Luis E. Romero, David F. Pozo, Jorge A. Rosales Universidad de Las Américas, Escuela Politécnica Nacional

 Quadcopter stabilization by using PID controllers Luis E. Romero1, David F. Pozo2, Jorge A. Rosales3 1 Escuela Politécnica Nacional, Ladrón de Guevara E11 - 253, Quito, Ecuador, EC170127. 2 IEEE Member, Universidad de Las Américas, Av. De los Granados E12-41 y Colimes esq., Quito, Ecuador, EC170125. 3 IEEE Member, Escuela Politécnica Nacional, Ladrón de Guevara E11 - 253, Quito, Ecuador, EC170127. Autores para correspondencia: luiseduromp@hotmail.com, david.pozo@udla.edu.ec, andres.rosales@epn.edu.ec Fecha de recepción: 21 de septiembre de 2014 - Fecha de aceptación: 17 de octubre de 2014 

 RESUMEN 

En este trabajo se presenta la estabilización de un cuadricóptero mediante el uso de controladores PID para la regulación de sus 4 movimientos básicos: ángulos de alabeo, cabeceo, guiñada y altitud. La estabilización del sistema se realiza a partir de un modelo simplificado que facilita la implementación de controladores en un sistema SISO, demostrando efectividad dentro de un rango de ±10° para los ángulos de alabeo y cabeceo y rango completo en guiñada y altitud. El módulo del controlador PID es diseñado para ser usado en cuadricópteros comerciales y ha sido implementado en base a sensores inerciales y ultrasónicos. Además, el sistema cuenta con una interface para observar el desempeño de la aeronave durante el vuelo.

 ABSTRACT

 This work presents the stabilization of a quadcopter by using PID controllers to regulate its four basic movements: roll, pitch, yaw angles, and altitude. The stabilization of the system is made from a simplified model which makes easier the implementation of controllers on a SISO system, showing effectiveness within a range of ±10° for a roll and pitch angles and a full range on yaw angle and altitude. The PID controller module is designed to be used with commercial quadcopters and it has been implemented using inertial and ultrasonic sensors. Furthermore, the system also features a wireless interface to observe the aircraft performance during the flight.

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https://publicaciones.ucuenca.edu.ec/ojs/index.php/maskana/article/view/585/509

An Improved Carrier-Based Discontinuous PWM Method with Phase-Current THD Reduction for Vienna Rectifier 비엔나 정류기의 상전류 THD 저감을 위한 개선된 불연속 변조 기법 Minseong Kim ․ Juyeon Lee ․ June-Seok Lee-The Transactions of the Korean Institute of Electrical Engineers, vol. 73, no. 12, pp. 2255~2263, 2024

 An Improved Carrier-Based Discontinuous PWM Method with Phase-Current THD Reduction for Vienna Rectifier 

 비엔나 정류기의 상전류 THD 저감을 위한 개선된 불연속 변조 기법 

 Minseong Kim ․ Juyeon Lee ․ June-Seok Lee 

 Abstract 

This paper proposes an improved CB-DPWM(Carrier-Based Discontinuous Pulse Width Modulation) method for the Vienna rectifier. The conventional CB-DPWM methods clamp the reference voltage to zero during intervals where the Vienna rectifier's normal operating condition is not met due to the offset voltage for DPWM operation. However, these additional clamping intervals cause an increase in the phase current THD(Total Harmonic Distortion). In this paper, an improved CB-DPWM method is proposed to reduce the phase current THD of the Vienna rectifier by minimizing intervals where the reference voltage is zero. Furthermore, neutral point voltage control can be applied in the non-clamping regions to mitigate fluctuations in the neutral point voltage. Consequently, the proposed method can enhance the phase current THD while maintaining the advantage of reducing switching losses. The effectiveness of the proposed method is verified through simulations and experimental results.

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http://journal.auric.kr/AURIC_OPEN_temp/RDOC/kiee01/kieet_202412_015.pdf

Design of Single-Phase PLL with DC Offset Rejection DC 오프셋 제거 성능을 갖는 단상 PLL 설계 Chan-Gi Lee ․ Kwang-Woon Lee ․ Sang-Il Kim-The Transactions of the Korean Institute of Electrical Engineers, vol. 73, no. 12, pp. 2231~2238, 2024

 Design of Single-Phase PLL with DC Offset Rejection DC

오프셋 제거 성능을 갖는 단상 PLL 설계 Chan-Gi Lee ․ Kwang-Woon Lee ․ Sang-Il Kim 이찬기* ․ 이광운** ․ 김상일 

 Abstract 

To control grid-connected inverters, grid synchronization is essential, and a Phase-Locked Loop (PLL) technique is commonly applied for this purpose. Among various PLL techniques, the Second Order Generalized Integrator (SOGI)-PLL is widely used due to its robustness against external noise. However, when the grid voltage contains a DC offset, the SOGI-PLL exhibits steady-state error, which is a limitation. To address this issue, this paper applies the Cascade SOGI (CSOGI)-PLL, which has a robust characteristic against DC offsets. Applying the CSOGI-PLL requires designing the parameters of a fourth-order transfer function and tracking the grid frequency by adjusting the resonant frequency. In this paper, a simplified design method using a second-order system for the damping coefficient of the CSOGI with a complex transfer function is proposed. A separate PLL is employed to update the resonant frequency of the CSOGI in response to rapid frequency variations, and frequency limitation and anti-windup control are applied to ensure stability during transients. To validate the effectiveness of the proposed method, simulations and experiments were conducted.

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:http://journal.auric.kr/AURIC_OPEN_temp/RDOC/kiee01/kieet_202412_012.pdf

FOUR-LEVEL THREE-PHASE INVERTER WITH REDUCED COMPONENT COUNT FOR LOW AND MEDIUM VOLTAGE APPLICATIONS V Sree Lakshmi, PG Scholar, Dept of EEE, JNTUA CEA, Ananthapuramu, Andhra Pradesh, India. : J Suresh, Research Scholar, Dept of EEE, JNTUA CEA, Ananthapuramu, Andhra Pradesh, India. : Dr R Kiranmayi, Professor, Dept of EEE, JNTUA CEA, Ananthapuramu, Andhra Pradesh, India. :

 FOUR-LEVEL THREE-PHASE INVERTER WITH REDUCED COMPONENT COUNT FOR LOW AND MEDIUM VOLTAGE APPLICATIONS

 V Sree Lakshmi, PG Scholar, Dept of EEE, JNTUA CEA, Ananthapuramu,Andhra Pradesh, India. 

 J Suresh, Research Scholar, Dept of EEE, JNTUA CEA, Ananthapuramu, Andhra Pradesh, India. :

 Dr R Kiranmayi, Professor, Dept of EEE, JNTUA CEA, Ananthapuramu, Andhra Pradesh, India. 

 ABSTRACT 

This paper proposes a novel three-phase topology with a reduced component count for low and medium-voltage systems. It requires three bidirectional switches and twelve unidirectional switches for producing four-level voltages without using flying capacitors or clamping diodes, reducing the size, cost, and losses. Removing flying capacitors and clamping diodes allows it to simplify control algorithms and increase the reliability, efficiency, and lifetime. A modified low-frequency modulation (LFM) scheme is developed and implemented on the proposed topology to produce a staircase voltage with four steps. Further, a level-shifted pulse width modulation (LSPWM) is used to reduce the filter size and increase the output voltage controllability. In this study, a voltage balancing control algorithm is executed to balance the DC-link capacitor voltages. The performance of the proposed topology is numerically demonstrated and experimentally validated on an in-house test setup. Within the framework, the power loss distribution in switches and conversion efficiency of the proposed circuit are studied, and its main features are highlighted through a comparative study.

VIEW FULL TEXT: http://www.journal-iiie-india.com/1_dec_23/10.2_dec.pdf

100kW-Class SiC Inverter Design for Series Hybrid Electric Propulsion System of Military Vehicle-Seok-Hwan Moon ․ Sang-Soo Park ․ Sang-Yong Kim ․ Jin-Uk Kim ․ Jun-Ha Hwang ․ Jin-Su Gwon

Abstract 

This paper proposes the design process of an inverter for 100kW-class military vehicle applying SiC-MOSFET. The SIC-MOSFET was selected in consideration of the performance and ease of design of the SIC-MOSFET, and the gate driver, DC-link capacitor, and heat sink were designed in consideration of the fast switching characteristics of the SIC-MOSFET and EMI noise. The designed SIC-MOSFET inverter was verified performance of the switching device through Double Pulse Test experiments and the performance of the inverter was verified by dynamo experiments. The Transactions of the Korean Institute of Electrical Engineers, vol. 73, no. 11, pp. 1958~1966, 2024

VIEW FULL TEXT: http://journal.auric.kr/kiee/ArticleDetail/RD_R/433766

LINK2: https://www.mediafire.com/file/nfvvqh37sa7dfxl/kieet_202411_014+(1).pdf/file

Made a transformer purely by hand, it's amazing

 

Design and Implementation of Interleaved Vienna Rectifier with Greater than 99%

 Design and Implementation of Interleaved Vienna Rectifier with Greater than 99%

CPES-高温运行50kW SiC 三相 AC-DC 变换器设计-CPES-High Temperature Operation 50kW SiC Three-Phase AC-DC Converter Design

 

Electromagnetic theory, calculation and application I - [Beijing Institute of Technology] - Professor Sheng Xinqing

ABB UPS PARA APLICAÇÕES EM DATA CENTER COM CARGAS INTELIGÊNCIA ARTIFICIAL-DCD CONNECT SÃO PAULO BRASIL

 

HIGH VOLTAGE SEMINAR Advantages of 650V GaN FETs for 800V Power Converters-ENG. RAMANAN NATARAJAN TEXAS INSTRUMENT

 

Power supply expert course advanced edition: charge pump/surge protection circuit

 

 MIT OpenCourseWare

Lecture 19: Inverters, Part 3 17 de jul. de 2024 MIT 6.622 Power Electronics, Spring 2023 MIT 6.622 Power Electronics, Spring 2023 Instructor: David Perreault

BASIC STATE SPACE MODEL PWM CONVERTER IN CCM -ShanghaiTech University=PROFESSOR WANG HAOYU

 

Power Electronic Converter Modeling and Control - ShanghaiTech University - Power Electronics Technology - Electrical Engineering - Electronic Information Engineering - Power Management Technology

U-shaped high-frequency transformer HIGH VOLTAGE

 

Using a U-shaped high-frequency transformer that is more efficient than the E-shaped one, a 15KV plasma lighter can be made, which can melt iron wires

STATE SPACE EXAMPLE: NON-IDEAL BUCK-BOOST -"Modeling and Control of Power Electronic Converter"Shanghai Tech University Professor Wang Haoyu

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IGBT-"Modeling and Control of Power Electronic Converters" Lecturer: Wang Haoyu Course-Shanghai Tech University Professor Wang Haoyu

 

IGBT-"Modeling and Control of Power Electronic Converters" Lecturer: Wang Haoyu Course-Shanghai Tech University Professor Wang Haoyu

（加拿大博主报道）中国如何建造天宫空间站- How China built the Tiangong space station

（加拿大博主报道）中国如何建造天宫空间站- How China built the Tiangong space station

Power Electronics Technology】Xi'an Jiaotong University丨BASIC PRINCIPLES OF PWM CONTROL-PART-3

 

Power Electronics Technology】Xi'an Jiaotong University丨BASIC PRINCIPLES OF PWM CONTROL-PART-3

Power Electronics Technology】Xi'an Jiaotong University丨PWM CONTROL-PART-2

 

Power Electronics Technology】Xi'an Jiaotong University丨PWM CONTROL-PART-2

Power Electronics Technology】Xi'an Jiaotong University丨BASIC PRINCIPLES OF PWM CONTROL-PART-1

 

Power Electronics Technology】Xi'an Jiaotong University丨BASIC PRINCIPLES OF PWM CONTROL-PART-1

【Power Electronics Technology】Xi'an Jiaotong University-INTRODUCTION

【Power Electronics Technology】Xi'an Jiaotong University丨Contains courseware-COMMON PROBLEMS OF POWER ELECTRONICS

 

Power Electronics Research-HIGH FREQUENCY INVERTER AND RECTIFIER

Protective earthing and protective zero connection in power system

 Protective earthing and protective zero connection in power system

Mean Well 1200W Inverter Disassembly

 

芯仙方案2200W双向AC-DC逆变器参考设计解析：具备UPS功能，可适用48V电池储能-Xinxian Solution 2200W Bidirectional AC- DC Inverter Reference Design

 This bidirectional inverter is a three-active bridge design, using two NXP MC56F81768MLH digital signal controllers for overall control. MPS and Nanochip drivers are used to drive the switch tubes. The battery-side switch tube is from Infineon, model IPP023N10N5, the high-voltage MOS tube is from Optoelectronics, model SJMN099R60ZSW, and the IGBT is from Trino, model TGH40N65F2DS.

MANUTENÇÃO DE CARREGADOR DE BATERIA DE LITIO

Electric vehicle charger repair

A Study on the 500W Class Converter for Power Supply of Ultrasonic Anti-Fouling System for Small Ships Based on Independent Power 독립전원 기반 소형 선박의 초음파 방오 시스템 전원 공급용 500W급 컨버터에 관한 연구

The Transactions of the Korean Institute of Electrical Engineers KIEE Vol. 72, No. 10, p.1173-1179 ISSN (print) :1975-8359 ISSN (online) :2287-4364 Received :15 June 2023Revised :14 September 2023Accepted :22 September 2023 DOI :http://doi.org/10.5370/KIEE.2023.72.10.1173

 A Study on the 500W Class Converter for Power Supply of Ultrasonic Anti-Fouling System for Small Ships Based on Independent Power 독립전원 기반 소형 선박의 초음파 방오 시스템 전원 공급용 500W급 컨버터에 관한 연구 김동욱 (Dong-Wook Kim) 1iD 김배성 (Bae-Sung Kim) 1iD 신덕식 (Duck‑Shick Shin) †iD

 Abstract 

An ultrasonic anti-fouling system that works to remove bio-fouling, which is organic substances attached to structures under the water surface of a ship, while the ship is anchored is proposed. In order to review the configuration and applicability of the proposed system, it is designed by analyzing the operation patterns of coastal small ships and simulating power consumption according to the operation patterns. In this paper, a 500W class converter is proposed among the proposed system. To achieve high performance, a continuous conduction mode that can reduce the size of a circuit and improve efficiency of the system is applied, a two-phase interleaved boost converter applied to schottky diode and N-MOSFET power switch which are capable of high-speed switching is designed. In addition, P&O method that is easy to implement and has a simple structure among MPPT control algorithms is applied to track the optimal operating point in the non-liner characteristics of independent power module. To verify the usefulness of the proposed system, a 500W class power converter is designed. Through simulations and experiments, the performance of the MPPT algorithm according to the solar radiation condition of the independent power module and the two-phase interleaving algorithm are verified. In particular, the MPPT efficiency of over 99.6% is confirmed even under environmental conditions where the amount of solar radiation rapidly changed from 100% to 75% and the power conversion efficiency at 500W output is confirmed to be 96.26%, confirming the usefulness of the proposed circuit.

VIEW FULL TEXT:http://journal.auric.kr/AURIC_OPEN_temp/RDOC/kiee01/kieet_202310_006.pdf

A Study on the Improvement of Stability Through Improved PLL Control Techniques Based on PFC and LLC Topology With Integrated Transformer 통합 변압기를 적용한 PFC, LLC 토폴로지 기반 개선된 PLL 제어기법을 통한 안정성 향상에 관한 연구 Yong-Jin Shin Woo-Cheol Lee

 

A Study on the Improvement of Stability Through Improved PLL Control Techniques Based on PFC and LLC Topology With Integrated Transformer 

통합 변압기를 적용한 PFC, LLC 토폴로지 기반 개선된 PLL 제어기법을 통한 안정성 향상에 관한 연구 Yong-Jin Shin Woo-Cheol Lee 

 Abstract 

This paper presents an enhanced Phase-Locked Loop (PLL) method using the Goertzel algorithm to improve the performance of Power Factor Correction (PFC) and LLC resonant converters. By eliminating the current sensor at the DC-link capacitor and allowing the LLC converter to operate within the PFC converter's frequency range, the new method ensures efficient Zero Current Switching (ZCS). Experimental and simulation results demonstrate that our approach significantly improves the power factor compared to conventional methods. This solution simplifies the circuit design, reduces overall costs, and increases system reliability.

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http://journal.auric.kr/AURIC_OPEN_temp/RDOC/kiee01/kieet_202407_014.pdf

Signals and Circuits – Baskakov-

 

About the book 

The present book is a course on signals and circuits as it is taught in the USSR. This subject figures prominently among the fundamental disciplines essential to the expertise of communication engineers. Keeping pace with overall progress in science and technology and reflecting the current trends in component design and theory, this course combines and sets forth in a systematic way the most important principles in the field of communications. In his work on the text, the author has been guided by the idea that material should be specifically tailored to the teaching practice at college. This approach has governed the selection of material and the degree of detail in its presentation: its pages contain what, as the author believes, the student can fully assimilate during the time allotted. Specific circuit types, their study and comparative analysis-all this belongs to the specialized subjects in communication engineering. This text includes a wide variety of material and a wealth of concepts and techniques which will come the student’s way for the first time. Ample space is devoted to mathematical tools of study. To link theory closer to practice, the chapters contain a great number of examples and problems giving the student deeper insight into the techniques of engineering analysis. The book was translated from Russian by V. Kuznetsov was published in 1986 by Mir Publishers

SOURCE :https://mirtitles.org/2022/02/12/signals-and-circuits-baskakov/

BOOK IN WEB:https://archive.org/details/baskakov-signals-and-circuits-mir-publishers

ALTERNATIVO ENLACE:https://www.mediafire.com/file/d3k72hu437dqoma/Baskakov+-+Signals+and+Circuits.pdf/file

反激MOS管上的波形分析，反激工作原理-Waveform analysis on flyback MOSFET, flyback working principle.

Of the many converter topologies around today, the flyback topology is one of the most frequently used. Although simple, this converter design offers great advantages for certain applications. New, more complex topologies have surfaced in recent years, but flyback converters remain a popular design choice.

Operating Modes

 Like other converters a yback converter has two operating modes; continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The two operation modes have dierent transfer equations and dierent current and voltage wave forms. Therefore, from a design point of view it is important to analyse the current and voltage that the electric components in the converter experience. Particularly the current owing through the circuit, voltage across the switch and the diode [2]. The magnetizing inductance and the load current determines the operation mode of the converter. During the analysis of the dierent conduction modes of the converter, the following assumptions will be made [5].  The converter is operating in steady state  The converter is ideal, that is the input power is equal to the output power  Leakage inductance, stray capacitors and stray resistances are neglected.

전압 직렬보상 방식 디지털 제어 교류 저전압보상기 정 강 률* Digital-Controlled AC Low-Voltage Compensator with Voltage Series Compensation Method Gang-Youl Jeong*

 

전압 직렬보상 방식 디지털 제어 교류 저전압보상기 정 강 률* Digital-Controlled AC Low-Voltage Compensator with Voltage Series Compensation Method Gang-Youl Jeong* Journal of KIIT. Vol. 21, No. 12, pp. 87-98, Dec. 31, 2023. pISSN 1598-8619, eISSN 2093-7571 87 

 Abstract 

This paper presents the digital-controlled AC low-voltage compensator with voltage series compensation method. The proposed AC low-voltage compensator compensates for the magnitude of the AC load input voltage, which is the final output voltage, with the voltage series compensation method using a power circuit topology consisting of a pulse-width modulation(PWM) AC-AC power converter and a compensating transformer. To this end, the proposed low-voltage compensator simply feeds back the magnitude of AC load input voltage through a circuit consisting of a current-type voltage transformer, a diode full-bridge rectifier, and a resistor/capacitor. Additionally, using a micom, it converts the feedback voltage to a digital value through A/D conversion and easily controls the entire system. This paper first briefly describes the operating principle of the power converter applied to the proposed low-voltage compensator and explains the control method of low-voltage compensation and the feedback method of final output voltage. Then, the driving method of the bidirectional power semiconductor switch of power converter is explained, and the implementation feasibility and good operating characteristics of the proposed low-voltage compensator are validated through the experimental results of the prototype.

VIEW FULL TEXT:  https://ki-it.com/xml/38930/38930.pdf

단일단 교류 전력변환기를 이용한 자동 교류 전압조정기-Automatic AC Voltage Regulator using the Single-Stage AC Power Converter Gang-Youl Jeong*

 

단일단 교류 전력변환기를 이용한 자동 교류 전압조정기 정 강 률* Automatic AC Voltage Regulator using the Single-Stage AC Power Converter Gang-Youl Jeong* Journal of KIIT. Vol. 20, No. 11, pp. 73-83, Nov. 30, 2022. pISSN 1598-8619, eISSN 2093-7571 73 

 Abstract 

This paper presents the automatic AC voltage regulator using the single-stage AC power converter. The proposed automatic AC voltage regulator uses a pulse-width modulation(PWM) type non-isolated single-stage step-up/down AC power converter to control and maintain the level of AC voltage on the output-side to a desired level. Since the proposed voltage regulator controls the magnitude of output voltage by using only the average of the scaling values of the output voltage fed back by a simple voltage feedback circuit without phase synchronization, the control method of output voltage is simple. Thus, the proposed voltage easily controls the entire system using a single-chip microcontroller. In this paper, first, the operating principle of the power converter of proposed voltage regulator is briefly explained, and then the feedback and control method of output voltage are described. The feasibility and operating characteristics of proposed voltage regulator are verified through the experimental results of prototype. The proposed voltage regulator can control and maintain the output-side AC voltage to a desired level by performing the step-up/down control operation accurately, and shows a fast dynamic response characteristic.

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NO-BREAK PARA APLICAÇÕES RESIDENCIAIS, COMERCIAIS E INDUSTRIAIS DE 5kW COM INTERFACE PARA PAINEL SOLAR Carlos H. G. Treviso, Aziz E. Demian Jr., André L. B. Ferreira -Universidade Estadual de Londrina - Londrina - PR -BRASIL

 

NO-BREAK PARA APLICAÇÕES RESIDENCIAIS, COMERCIAIS E INDUSTRIAIS DE 5kW COM INTERFACE PARA PAINEL SOLAR 

Carlos H. G. Treviso, Aziz E. Demian Jr., André L. B. Ferreira Universidade Estadual de Londrina - UEL CEP 86055-900, C.P. 6001, Londrina - PR -BRASIL 

 Resumo – Este artigo traz um projeto completo de um No-Break de 5kW de saída, para aplicações residenciais, comerciais e industriais, sendo uma importante contribuição para o meio acadêmico e comercial. Permite ainda a utilização de painéis solares, podendo tornar a carga em questão menos dependente da rede elétrica, além da utilização da energia limpa. Para tanto foi implementado um protótipo em campo, com banco de baterias de 48V (24 baterias de 12V/7,2A), com estimativa de autonomia de 25 minutos para carga máxima. 

 RESIDENTIAL, COMMERCIAL AND INDUSTRIAL APPLICATIONS FOR A 5kW UPS UNIT WITH INTERFACE FOR SOLAR PANNEL COUPLING

 Abstract – This article presents the complete project for a 5kW UPS unit devised, for residential, commercial and industrial applications that is an important contributing for the academic and commercial environment. It allows the use of solar panels, that can make the load less dependent on electric system and the use of clean energy. For this was implemented a prototype in field, with batteries bank of 48V (batteries of 12V/7,2A), with 25 minute estimate autonomy for maximum load.

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https://sobraep.org.br/site/uploads/2018/06/rvol14no3p8.pdf

Mathematical analysis in problems and exercises. Differential and integral calculus V. A. Sadovnichy, I. A. Vinogradova, S. N. Olehnik-Математический анализ в задачах и упражнениях. Дифференциальное и интегральное исчисление В. А. Садовничий, И. А. Виноградова, С. Н. Олехник

 

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https://www.mediafire.com/file/23s6ex2kefhhtpv/Mathematical+analysis+in+problems+and+exercises.-Математический+анализ+в+задачах+и+упражнениях.+Дифференциальное+и+интегральное+исчисление+(В.+А.+Садовничи.).pdf/file