The Double Discontinuous Mode Operation of a Converter: A Method for Soft Switching

Sadarnac, Daniel; Abida, W.; Karimi, Charif

doi:10.1109/tpel.2003.823171

Cited by 12 publications

(6 citation statements)

References 9 publications

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“…The proposed converter is composed of controlling devices, a step-up inductor L r , and a snubber capacitor C r used in similar way for the conventional converter. Furthermore, the current flowing through the inductor L r is controlled to be discontinuous [6,7], then the turn-on operation of the switches S 1 and S 2 becomes to be ZCS. The turn-off of the switches is also operated with ZVS by the partial resonant operation.…”

Section: Configuration and Operation Principle Of Proposed Convertermentioning

confidence: 99%

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A new boost dc-dc converter of high efficiency by using a partial resonant circuit

Kwak

2009

IEICE Electron. Express

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This paper presents a new boost dc-dc converter with high efficiency by using a partial resonant circuit. The switching devices in the proposed converter are operated by a soft-switching technique (ZCS; zero current switching, or ZVS; zero voltage switching) of a new partial resonant circuit. The partial resonant circuit makes use of a step-up inductor and a loss-less snubber capacitor. The switching control technique is simplified for the switches to drive in constant switching frequency with PWM (pulse width modulation). The results are that the switching power loss is very low and the system efficiency is high.

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Section: Configuration and Operation Principle Of Proposed Convertermentioning

confidence: 99%

“…The partial resonant operation makes ZCS or ZVS for the control switches without switching losses so called "soft-switching" [3,4,5]. The switching control technique of the proposed converter is simplified for the switches to drive in constant switching frequency [4,6].…”

Section: Introductionmentioning

confidence: 99%

A new boost dc-dc converter of high efficiency by using a partial resonant circuit

Kwak

2009

IEICE Electron. Express

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“…In discontinuous mode, the input ac current becomes a quasi sinusoidal waveform in proportion to the magnitude of input ac voltage under constant switching frequency with PWM. The control circuit for the DCM converter eliminate-es the complicated circuit control requirement and reduces the number of components [4]- [5]. Moreover, in this mode, the turn-on of chopper switching devices occurs at zero current, that is, zero current switching.…”

Section: Introductionmentioning

confidence: 99%

A Study on Isolated DCM Converter for High Efficiency and High Power Factor

Kwak¹

2010

Journal of Electrical Engineering and Technology

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-This paper is studied on a novel buck-boost isolated converter for high efficiency and high power factor. The switching devices in the proposed converter are operated by soft switching technique using a new quasi-resonant circuit, and are driven with discontinuous conduction mode (DCM) according to pulse width modulation (PWM). The quasi-resonant circuit makes use of a step up-down inductor and a loss-less snubber capacitor. The proposed converter with DCM also simplifies the requirement of control circuit and reduces a number of control components. The input ac current waveform in the proposed converter becomes a quasi sinusoidal waveform in proportion to the magnitude of input ac voltage under constant switching frequency. As a result, it is obtained by the proposed converter that the switching power losses are low, the efficiency of the converter is high, and the input power factor is nearly unity. The validity of analytical results is confirmed by some simulation results on computer and experimental results.

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“…The DCM control method is used by a large number of converters, because the control circuit and technique of DCM are simple. Also in discontinuous mode, the ac input current is nearly sinusoidal waveform with the constant duty cycle switching [4,5]. Another merit of this mode is that turn on of switches in converter occurs at zero current switching (ZCS).…”

Section: Introductionmentioning

confidence: 99%

“…As a result of these, the converter brings on low efficiency. To improve these, a large number of soft switching topologies included resonant circuits have been proposed [5,6,7,8]. But these topologies increase number of switching device in circuit and complicate sequence of switching operation.…”

Section: Introductionmentioning

confidence: 99%

Novel PFC ac-dc converter of high efficiency used in 2kW fire electric installation

Kwak¹

2007

IEICE Electron. Express

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Abstract:This paper proposes a novel power factor correction (PFC) ac -dc converter of high efficiency used in fire electric installation operated with generally rated power 2 kW. The input current waveform in proposed converter is got to be sinusoidal waveform in proportion to magnitude of ac input voltage under constant duty cycle switching. The proposed converter is driven with discontinuous conduction mode (DCM), and then the control circuit requirement is simple. As results of these, the input power factor is nearly unity and the control method is simple. Also the switching devices in converter are operated with soft switching by partial resonant method. The results are that the switching power loss is very low and the efficiency of converter is high. The validity of analytical results is confirmed from some simulative results on computer and experimental results.

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The Double Discontinuous Mode Operation of a Converter: A Method for Soft Switching

Cited by 12 publications

References 9 publications

A new boost dc-dc converter of high efficiency by using a partial resonant circuit

A new boost dc-dc converter of high efficiency by using a partial resonant circuit

A Study on Isolated DCM Converter for High Efficiency and High Power Factor

Novel PFC ac-dc converter of high efficiency used in 2kW fire electric installation

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