Novel zero-current-transition PWM converters

Hua, Guichao; Yang, E.X.; Jiang, Yan; Lee, F.C.

doi:10.1109/pesc.1993.472073

Cited by 181 publications

(82 citation statements)

References 18 publications

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“…A new class of soft-switching converter was proposed by Hua (1992), namely ZVT PWM converters. These converters use a few additional elements placed in a parallel path with the main power circuit providing zero voltage commutation for the main switch without additional voltage and current stresses.…”

Section: Principles Of Operationmentioning

confidence: 99%

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A family of improved ZVT PWM converters using an auxiliary resonant source

Martins

Pinheiro

et al. 2003

Sba Controle & Automação

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This paper presents a novel family of Zero Voltage Transition (ZVT) DC-DC PWM Converters that uses a resonant circuit as auxiliary commutation source to control the current through the auxiliary switch without additional current stresses on main devices. The improved ZVT commutation cell enables the main switch to be turned on and off at Zero Voltage Switching (ZVS) and the auxiliary switch to be turned on and off at Zero Current Switching (ZCS) from zero to full-load.

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Section: Principles Of Operationmentioning

confidence: 99%

“…Although ZVT is a well-accepted technique, several ZVT commutation cells proposed in the literature suffer drawbacks such as: Hua (1992), Streit (1991);…”

Section: Introductionmentioning

confidence: 99%

A family of improved ZVT PWM converters using an auxiliary resonant source

Martins

Pinheiro

et al. 2003

Sba Controle & Automação

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“…High switching losses furthermost reduce the power-handling capabilities of the converters hence reducing their life span and causing limited efficiency. Also transition intervals take long time and cause conduction losses over one switching cycle [3]. …”

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confidence: 99%

“…When the main switch turns ON, reverse recovery current of the diode flows across the main diode and results in the occurrence of a short circuit between the main switch and the diode. The auxiliary switch turns OFF by hard switching and their parasitic capacitors discharge through the switches [3], [10] [7]. In the conventional zero-voltage transition (ZVT)-PWM converter [2], the main switch turns ON with ZVT perfectly by means of a snubber cell.…”

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A Simulation Study of Active Snubber Cell for A PWM DC-DC Boost Converter

SAMREEN¹,

Sundar²

2014

IJAREEIE

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This paper introduces a study of a new boost converter with an active snubber cell which is developed to overcome most of the drawbacks of conventional zero-voltage transition (ZVT) and zero-current transition (ZCT) converters. In the proposed work, the EMI noise is reduced by increasing the power density and efficiency of the pulse width modulation. In this converter, the snubber cell and all semiconductor devices will operate at soft switching even at higher switching frequencies. Further, additional current and voltage stress across the main and auxiliary components is limited. Simplicity in structure, ease of control and soft switching are the main advantages of the circuit. The results of the proposed topology are studied in detail through simulation and results are presented with a high efficiency of 98%. The proposed work demonstrates the feasibility of the converter through simulation results. KEYWORDS:Boost Converter, Snubber cell, zero-current transition, zero-voltage transition. I.INTRODUCTIONSwitching frequency plays an important role in the operation of the converters. PWM dc-dc converters with high frequencies have been widely used in various power electronic applications such as power factor correction, battery charging, and renewable energy applications because of their high power density, fast transient response, and ease and simplicity in control. However, due to high-frequency operation switching losses occur, and has higher electromagnetic interference (EMI), and poor converter efficiency [1]. Switching losses and EMI noises of PWM converters are mainly generated during turn-on and turn-off switching transients [2].Conventional converters operate with hard switching or traditional switching and are known as hard switching converters. During turn ON period, the voltage across the switch tends to increase and the current tends to decrease, which results in some switching losses. Similarly during turn OFF period the voltage tends to increase and the current tends to decrease across the switch. Again it leads to some switching losses. Recently, switch-mode power supplies have become smaller and lighter due to higher switching frequency. However, higher switching frequency causes lots of periodic losses at turn ON and turn OFF, resulting in increasing losses of the whole system. Operating at high frequency with traditional hard switching pulse-width-modulation (PWM) converters is limited because of substantial switching loss. Again it leads to some switching losses that adversely affect the efficiency of operation. High switching losses furthermost reduce the power-handling capabilities of the converters hence reducing their life span and causing limited efficiency. Also transition intervals take long time and cause conduction losses over one switching cycle [3].

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Single Phase Soft Switching Techniques Power Factor Correction Converter

Anjappa¹,

Naresh

Ramesh

et al. 2014

Lecture Notes in Electrical Engineering

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This paper proposes a dual mode used to control a single phase soft switching boost power factor correction converter (PFC) developed with a new active snubber circuit. The soft switched boost power factor correction converter has merits of less voltage and current stresses, improved efficiency and reduced switching losses. Thus the cost and complexity of the converter is reduced. The dual mode controller combines both continuous conduction mode (CCM) and critical conduction mode (CRM). The simulation results declare high efficiency and optimum power factor for wide range of varying loads.

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Novel zero-current-transition PWM converters

Cited by 181 publications

References 18 publications

A family of improved ZVT PWM converters using an auxiliary resonant source

A family of improved ZVT PWM converters using an auxiliary resonant source

A Simulation Study of Active Snubber Cell for A PWM DC-DC Boost Converter

Single Phase Soft Switching Techniques Power Factor Correction Converter

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