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1

Single input LC series resonant converter based high brightness light emitting diode driver with ZVS

Udumula Ramanjaneya Reddy

Journal of Power Technologies

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2021

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Vol. 101, nr 1

54--61

EN

This work proposes a high brightness light emitting diode (HB-LED) driver circuit based on a full-bridge LC series resonant converter with series DC bus for low power applications with a dimming feature. The proposed configuration consists of full-bridge LC series resonant converter with a series DC bus. The idea behind the concept is to supply the light emitting diode (LED) threshold voltage directly from the constant DC bus - and the control voltage, which is used for current regulation, is supplied through a full-bridge LC resonant converter. Since the control voltage responsible for current regulation is only processed by the full-bridge series resonant converter, the conduction loss is less even if several LED strings are connected to the same converter. The proposed HB-LED driver is characterized by low switching loss, reduced component count, high efficiency, and reduction of output electrolytic capacitor. Further, double pulse width modulation (DPWM) dimming control is designed and used to control the average output currents. The proposed high brightness light emitting diode (HB-LED) driver circuit based on a full-bridge LC series resonant converter is simulated using Orcad/PSpice software. The theoretical analysis and predictions of the proposed full-bridge series resonant converter-based HB-LED driver is in close agreement with the results obtained.

2

A buck-boost controlled full bridge LED driver with zero-voltage switching

Ramakrishnareddy Ch. Kasi, Kumar K. Ranjith, Kalavathi M. Surya

Journal of Power Technologies

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2021

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Vol. 101, nr 1

62--69

EN

A full bridge driver circuit with modulated input voltage using buck-boost converter for LED lighting systems is proposed. A dc voltage source, which is in series, processes portion of lamp power without conversion. Small controlled power is supplied through full bridge circuit. In the proposed configuration, current stress of switches in full bridge is greatly reduced. In addition, zero-voltage switching (ZVS) is accomplished in full bridge devices. Input voltage variations can be compensated to maintain constant LED lamp current. All LED lamps are dimmed simultaneously using on-off control. The circuit description and analysis are discussed in detail and it is validated experimentally.

3

A novel quasi-resonant ZVS boost converter with tapped inductor

Dawidziuk Jakub, Harasimczuk Michał

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2021

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Vol. 69, nr 1

art. no. e136043

EN

The purpose of this paper is to propose a model of a novel quasi-resonant boost converter with a tapped inductor. This converter combines the advantages of zero voltage quasi-resonant techniques and different conduction modes with the possibility of obtaining a high voltage conversion ratio by using a tapped inductor, which results in high converter efficiency and soft switching in the whole output power range. The paper contains an analysis of converter operation, a determination of voltage conversion ratio and the maximum voltage across power semiconductor switches as well as a discussion of control methods in discontinuous, critical, and continuous conduction modes. In order to verify the novelty of the proposed converter, a laboratory prototype of 300 W power was built. The highest efficiency η = 94.7% was measured with the output power Po = 260 W and the input voltage Vin = 50 V. The lowest efficiency of 90.7% was obtained for the input voltage Vin = 30 V and the output power Po = 75 W. The model was tested at input voltages (30–50) V, output voltage 380 V and maximum switching frequency 100 kHz.

4

Single switch quasi-resonant ZVS converter with tapped inductor

Harasimczuk M., Borchert A.

Przegląd Elektrotechniczny

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2018

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R. 94, nr 3

44-48

EN

This paper presents a quasi-resonant zero-voltage switching boost converter with tapped inductor. Thanks to the use of a tapped inductor, a high voltage gain is achieved. A resonant circuit ensures that the converter transistor is switched at zero voltage. Soft transistor switching enables increase of converter operation frequency. The control is done by pulse width modulation and constant turn off time of the transistor. The softswitching technique enables the converter to operate at higher frequencies. We provide a detailed discussion of the operation of the converter and present its control characteristics. Next, we discuss the importance of optimally choosing the values of resonant elements. Finally, the results of laboratory tests are presented.

PL

Artykuł przedstawia quasi-rezonansowy przekształtnik podwyższający napięcie z dławikiem dzielonym przełączany przy zerowym napięciu. Wykorzystanie dławika dzielonego umożliwia uzyskanie wysokiego współczynnika wzmocnienia napięciowego. Obwód rezonansowy zapewnia przełączanie tranzystora przekształtnika przy zerowym napięciu. Miękkie przełączanie tranzystora daje możliwość zwiększenia częstotliwości pracy przekształtnika. W artykule szczegółowo omówiono pracę przekształtnika, została wyprowadzona jego charakterystyka sterowania. Omówiono zasadę optymalnego doboru wartości elementów rezonansowych. Artykuł kończy się przedstawieniem wyników badań laboratoryjnych potwierdzających prawidłowe działanie przekształtnika.

5

SiC-based phase-shift dual half bridge DC-DC converter as a key component of multilevel cascaded MV converters

Adamowicz M., Strankowski P., Pietryka J., Szewczyk J., Guziński J.

Przegląd Elektrotechniczny

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2014

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R. 90, nr 9

203-210

EN

The paper describes SiC-based dual half bridge (DHB) DC-DC converter considered as a key component of high frequency isolated multilevel cascaded medium voltage converters. Two topologies of bi-directional DC-DC converters: the resonant half-bridge DC-DC converter and the phase-shift DHB converter are compared in the paper. Experimental results of SiC-based 50 kHz DHB DC-DC converter are presented in the paper.

PL

W artykule przedstawiono dwukierunkową izolowaną przetwornicę półmostkową DC-DC z izolacją realizowaną za pomocą transformatora wysokiej częstotliwości jako proponowany podstawowy moduł funkcjonalny kaskadowych przekształtników średniego napięcia. Porównano dwie topologie izolowanych przetwornic półmostkowych DC-DC: rezonansową oraz ze sterowaniem przesunięciem fazowym napięć strony pierwotnej i wtórnej transformatora. Przedstawiono analizę oraz wyniki eksperymentalne przetwornicy półmostkowej DC-DC z przyrządami SiC pracującej z częstotliwością 50kHz.

6

Analysis of high-frequency ZVS (zero voltage switched) multiresonant converters

Szychta E., Szychta L.

Archives of Transport System Telematics

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2014

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Vol. 7, iss. 3

57--63

EN

The paper presents chosen issues of multiresonant ZVS DC/DC converters for use in transport devices. It provides results of mathematical analysis, simulation and experimental testing of selected multiresonant ZVS DC/DC conversion circuits. The paper explores the theory of the multiresonant DC/DC conversion circuits in consideration of single-transistor topologies. In the end conclusions are presented.

7

Analiza rezonansowego falownika klasy E

Szychta E.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Elektryka

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2005

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Z. 42

353-370

PL

W artykule omówiono rezonansowy falownik ZVS przeznaczony do pracy z częstotliwością 100 kHz. Obwód rezonansowy falownika poddano analizie matematycznej z wykorzystaniem metody zmiennych stanu. Przedstawiono wyniki badań symulacyjnych w oparciu o programy: SIMULINK oraz Simplorer.

EN

The paper presents an one-phase resonant ZVS inverter using MOSFET transistor, designed to operate at frequency of 100 kHz. The resonant circuit have been analysed. Results of inverter simulation tests using SIMULINK and Simplorer software have been discussed.