An Asymmetric Half-Bridge Resonant Converter Having a Reduced Conduction Loss for DC/DC Power Applications With a Wide Range of Low Input Voltage

Jeong, Yong Hwan; Kim, Jae-Kuk; Lee, Jae-Bum; Moon, Gun-Woo

doi:10.1109/tpel.2016.2639069

Cited by 71 publications

(39 citation statements)

References 22 publications

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“…Thus, the total LED load 2 comprises two LED strings in parallel where each string contains 12 LEDs in series. After computing L BBcrit with two loads from (21), the value of inductor L BB is chosen little higher than L BBcrit as 50μH.…”

Section: Calculation Of Resonant Elementsmentioning

confidence: 99%

“…In Alonso et al, half‐bridge inverter with DC blocking capacitor is used as LED driver, where inductance is varied to control the LED illumination. In Jeong et al and Lin et al, buck‐boost integrated isolated asymmetrical half‐bridge resonant converter is presented, which is suitable for wide input voltage variations. When the power processed is small and isolation is not necessary, non‐isolated converters are preferred for easier implementation and less cost.…”

Section: Introductionmentioning

confidence: 99%

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A buck‐boost integrated high gain non‐isolated half‐bridge series resonant converter for solar PV/battery fed multiple load LED lighting applications

Veeramallu

Porpandiselvi

Narasimharaju

2019

Circuit Theory & Apps

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Summary Solar photovoltaic (SPV) or battery fed multiple load LED lighting applications are gaining importance these days, which require independent voltage regulation and dimming control. Half‐bridge resonant converters are mostly used due to their simple structure. In this paper, a buck‐boost integrated high gain non‐isolated symmetrical half‐bridge series resonant converter is proposed for multiple load LED lighting applications. With the aid of integrated buck‐boost operation, the output voltage can be regulated below and above the nominal input voltage effectively and can produce twice the gain as compared with classical half‐bridge converters. Frequency modulation is implemented for output voltage regulation. Pulse width modulation (PWM) dimming has been adopted for illumination control. The proposed driver results in several advantages such as low cost, compact size, improved efficiency due to soft‐switching, simple control, independent dimming, and effective operation for multiple loads. Thus, the proposed non‐isolated driver configuration is well suited for SPV/battery fed multiple load LED lighting applications. The proposed configuration is tested with single LED load of 22 W and dual‐LED loads of 22 W and 43 W. There is an excellent consensus between the simulation and the experimental outcomes.

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Section: Calculation Of Resonant Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A buck‐boost integrated high gain non‐isolated half‐bridge series resonant converter for solar PV/battery fed multiple load LED lighting applications

Veeramallu

Porpandiselvi

Narasimharaju

2019

Circuit Theory & Apps

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“…However, the output voltage of solar panels and wind turbine generators is variable with the wide variation, due to the output voltage value, is related to solar intensity or wind speed. The classical two-stage or three-stage converters are usually adopted [1][2][3] to overcome the wide voltage variation problem of solar panels and or wind turbine generators, and also provide the stable output voltage. Unfortunately, the classical two-stage or three-stage circuit topologies have high power losses and low efficiency.…”

Section: Introductionmentioning

confidence: 99%

Phase-Shift PWM Converter with Wide Voltage Operation Capability

Lin

2019

Electronics

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A soft switching three-level pulse-width modulation (PWM) converter is presented for industrial electronics with wide voltage range operation, such as solar power or fuel cell applications. Phase shift PWM scheme is used on the input-side to accomplish the zero voltage turn-on on power switches and improve the converter efficiency. Three-level diode-clamp circuit topology is adopted in the presented circuit to lessen the voltage ratings on active devices for high voltage applications. Three sub-circuits with the different turns-ratio of transformers can be selected in the presented converter in order to achieve 10:1 (V in,max = 10V in,min ) wide input voltage operation when compared to the conventional multilevel converter. The proposed circuit is a single-stage converter instead of two-stage converter to realize wide voltage operation. Therefore, the presented converter has less component counts. Finally, the design procedure and experiments with a 300W laboratory circuit are presented and discussed to confirm the circuit analysis and converter performance.Electronics 2020, 9, 47 2 of 20 ZVS converters [24][25][26][27][28] can further eliminate the switching losses for medium voltage applications. However, the wide voltage operation is seldom discussed and investigated in conventional three-level soft switching converters. The input voltage range of the three-level converter that is discussed in [20][21][22][23][24][25][26][27][28] is less than 4:1 voltage range operation. For some wind power or solar power applications, the input voltage of DC converters might be greater than 6:1 or 8:1 voltage range, i.e., V in,max ≥ 6 or 8 V in,min .A ZVS three-level DC/DC converter is discussed and then investigated to have 10:1 (80 V~800 V) wide input voltage operation and ZVS operation on active devices. The presented three-level converter has three winding turns and three auxiliary switches on the output-side to achieve wide voltage range operation. Three auxiliary switches on the secondary-side are active or inactive and three different turns-ratio of the isolated transformer are connected to the output load based on the input voltage value. Thus, three equivalent sub-circuits can be operated in the proposed converter to achieve wide voltage operation. Three-level neutral-point diode-clamp converter is adopted on the input-side to have the advantages of low voltage rating and soft switching operation on active devices and increase circuit efficiency. The phase shift PWM operation is used to control the active devices of three-level converter. The leading-leg switches are easily turned on under ZVS operation. The presented circuit has less component counts with better circuit efficiency to achieve 10:1 wide voltage operation when compared to conventional two-stage DC converters. The proposed converter has much wider input voltage operation range as compared to conventional single-stage DC converters with 2:1 or 4:1 voltage range (10:1 voltage range from 80 V~800 V). The paper is organized, as follows. Section 2 discusses ...

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“…Uma das principais características que diferencia os conversores ressonantes é a conexão dos elementos do circuito ressonante (também denominados de circuito tanque), sendo as configurações mais empregadas a série ressonante, a paralelo ressonante e a série paralelo ressonante [7]. Quanto ao estágio inversor de entrada, existem algumas possibilidades de implementação, como o meia ponte [5], [14], [20], [21], o ponte completa [1], tipo T [22] e push-pull [4]. Para o retificador de saída, os mais utilizados são o ponte completa com ponto médio, o ponte completa [1] e o dobrador de tensão [22].…”

Section: Introductionunclassified

“…Para eliminar a componente de nível médio nos estágios do tipo ponte completa e pushpull, é utilizado um capacitor, conectado em série com o enrolamento primário do transformador (conhecido como capacitor de desacoplamento), que efetua o bloqueio deste valor médio [27]. Porém a adição do capacitor série aumenta o número de componentes passivos [20], [21]. No que se refere ao estágio meia ponte, existem diversas propostas na literatura.…”

Section: Introductionunclassified

Conversor CC-CC Paralelo Ressonante Meia Ponte Assimétrico com Saída em Tensão

Lazzarin¹,

Barbi²,

Delvanei³

et al. 2017

Eletrônica de Potência

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dobrador de tensão. A configuração possui número reduzido de interruptores, elimina circulação de corrente média nos elementos passivos tanto no primário quanto no secundário, e pode utilizar os parâmetros intrínsecos do transformador em seu projeto, o que a torna atrativa para aplicações como fontes de alta tensão de saída.Análise das etapas de operação, característica estática, equacionamento orientado ao projeto e a implementação de comutação sob tensão nula são abordados neste artigo. O estudo do conversor é verificado através de um protótipo de 1 kW, 400 V de entrada e 400 V de saída. O conversor apresentou rendimento elevado, acima de 97%, e comutação suave numa faixa de carga acima de 60% do valor nominal. Palavras-chave - HALF-BRIDGE PARALLEL RESONANT DC-DC CONVERTER WITH ASYMMETRICAL PWMAbstract -In this research, the study of a modified HalfBridge Parallel Resonant dc-dc converter is proposed. The proposed topology operates with constant frequency and asymmetrical PWM, such as the conventional one. The topology uses a voltage doubler rectifier in output stage, which avoid the flow of DC component current in the transformer primary. This characteristic improves the transformer design and eliminates the series capacitor, which is requred in the conventional half-bridge topology. The proposed topology also integrates the transformer parasitic elements, such as the leakage inductance and the winding capacitance in the operation, achieving zero voltage switching in transformer primary side switches, over a wide load range. Theoretical analysis, commutation analysis and design guidelines are presented in the paper. Experimental results from a 1 kW prototype, 50 kHz of switching frequency, 400 V at input voltage and 400 V A origem dos elementos parasitas ao longo do conversor está relacionada com sua aplicação. No contexto de fontes chaveadas para alta tensão, é comum o uso de transformador para conferir isolação galvânica ao projeto e elevação de ganho. Devido aos aspectos construtivos do transformador, necessários para operar com alta tensão, tais como número de espiras elevado, distância entre camadas, presença de material isolante, a presença dos elementos parasitas não pode ser desprezada, em especial da indutância de dispersão e da capacitância entre enrolamentos [3], [15], [16]. Estas podem ser responsáveis por provocar sobretensões e atrasos nas transições das tensões no transformador [17]. Já em veículos elétricos, incorporar os elementos parasitas propicia operar conversores com eficiência na ordem de 97%, com alguns exemplos encontrados em [18], [19].Um conversor CC-CC ressonante pode ser representado por três grandes blocos, conforme ilustrado no diagrama da Figura 1. Uma das principais características que diferencia os conversores ressonantes é a conexão dos elementos do circuito ressonante (também denominados de circuito tanque), sendo as configurações mais empregadas a série ressonante, a paralelo ressonante e a série paralelo ressonante [7]. Quanto ao estágio inversor de entrada, existem algu...

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An Asymmetric Half-Bridge Resonant Converter Having a Reduced Conduction Loss for DC/DC Power Applications With a Wide Range of Low Input Voltage

Cited by 71 publications

References 22 publications

A buck‐boost integrated high gain non‐isolated half‐bridge series resonant converter for solar PV/battery fed multiple load LED lighting applications

A buck‐boost integrated high gain non‐isolated half‐bridge series resonant converter for solar PV/battery fed multiple load LED lighting applications

Phase-Shift PWM Converter with Wide Voltage Operation Capability

Conversor CC-CC Paralelo Ressonante Meia Ponte Assimétrico com Saída em Tensão

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