Designing a zero voltage transition boost converter for power factor corrected modular telecom rectifiers

Jain, Nikhil; Jain, Prem C.; Joós, G.

doi:10.1049/cp:20010591

Cited by 5 publications

(4 citation statements)

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“…These two effects create a significant amount of power dissipation and high EMI related effects under high frequency hard-switch applications. To overcome these problems, several techniques have been developed, using additional components by Hui et al (1997), Jain et al (2001) and Gurunathan et al (2002).…”

Section: Introductionmentioning

confidence: 99%

“…But the requirement of two additional switches and isolated gate drive for one of the auxiliary switches increases the cost and complexity of the circuit. The approach described by Hui et al (1997), Moschopoulos et al (1999) and Jain et al (2001) uses only one auxiliary switch, but both switches operate under the soft-switched condition, using non-isolated gate drive. However, current stress of the two switches is increased in comparison to the hard-switched single switch operation.…”

Section: Introductionmentioning

confidence: 99%

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Optimized design of a fully soft-switched boost-converter suitable for power factor correction

Saha

Majumdar

Haldar

et al. 2006

International Journal of Electronics

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A fully soft-switched boost-converter using a one auxiliary switch is presented here. It uses the minimum number of components in the auxiliary circuit with minimum current stress of the main switch. Since the resonant capacitor charges only through an inductor and a diode, the circuit conduction losses are minimized. The main and auxiliary insulated gate bipolar transistor (IGBT) switches share a common emitter connection, facilitating direct drive to them. Various operating modes of the converter are presented in detail and analysed. The choice of the resonating capacitor and inductor has been done through an optimization process based on the guiding equations working under different modes. In this optimization process, emphasis has been given on minimum voltage stress on the auxiliary switch for a wide duty cycle range of operation. Based on the design, the principle of operation has been verified with computer simulation. Experimental results from a laboratory prototype with active power factor correction confirms the operation of this converter.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimized design of a fully soft-switched boost-converter suitable for power factor correction

Saha

Majumdar

Haldar

et al. 2006

International Journal of Electronics

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show abstract

“…But the conditions described with the assumptions, that the input requirement of two additional switches and isolated gate drive current Is is a constant current source (as Ls is large enough) for one of the auxiliary switch increases the cost and s complexity of the circuit. The approach described in [2]- [4] and the output V0 is constant voltage source (as CO is quite uses only one auxiliary switch, but both switches operate under large), during one switching cycle. Fig.…”

mentioning

confidence: 99%

“…G and Vcr= VO +V (4) where, V is some arbitrary voltage which will be determined during mode 7 operation. The duration of this ___.…”

mentioning

confidence: 99%

New Fully Soft-Switched Boost-Converter with Reduced Conduction Losses

Saha

Majumdar²,

Halder³

et al.

2005 International Conference on Power Electronics and Drives Systems

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A new fully soft-switched boost-converter is proposed mentioned above, but the turn-off of the single auxiliary switch here, using only one auxiliary switch. All switches used in this will not be with proper ZVS. The topology presented in [6] is converter turn on and turn off under fully soft-switched superior than others in terms of switching behaviour of the condition. The diodes also commutate softly. The converter uses switches, but the auxiliary circuit requires isolated gate drive. minimum number of components in the auxiliary circuit without additional current stress of the main switch. The circuitIn the present work, a new boost converter has been conduction losses are also minimised, since the resonant proposed using only one auxiliary switch in which all switches capacitor charging current flows only through an inductor and a operate under fully soft-switched condition without any diode. The main and auxiliary IGBT share a common emitter additional current stress of the main switch. Moreover, the connection, facilitating direct drive to them. The circuit is circuit involves minimum number of components in the path suitable for application to active power factor correction. Various for charging and discharging of resonant capacitor. Hence, the operating modes of the converter are presented and analysed. soft-switching is achieved with reduced conduction losses and The principle of operation has been verified with computer the diodes also commutate softly. Both the switches used in simulation and experimental results. this converter turn on under ZCS condition. The main switch is turned off under zero-voltage, zero-current condition. The Keywords-Boost converter; Power factor correction; soft auxiliary switch tum-off is also with zero voltage although no switching; ZVS; ZCS.capacitance is needed to be in parallel with the device. Thus, IGBTs are best suited for this application as its inherent I. INTRODUCTION parallel capacitance is very small. Here the parallel capacitor The PWM boost converter is widely used as a dc-dc required for ZVS turn-off is fulfilled by the discrete resonating converter and as a power factor correction (PFC) pre-regulator capacitor C, connected in series with the switch. for power supplies. The boost converter operated in the continuous conduction mode, is in fact the most popular II. PRINCIPLE OF OPERATION topology used in industry today for PFC. This converter, The proposed soft-switched boost converter as shown in Fig. however, has several problems due to the reverse recovery of Iuses an auxiliary network in addition to the boost inductor the boost diode and the switching losses associated with the switch. These two effects create a significant amount of power L5, boost switch S and boost diode D3. The auxiliary dissipation and high EMI in high frequency hard-switch network consists of one switch S2I one diode D2, two applications. To overcome these problems, several techniques inductors L1 and L2 and one resonant capacitor Cr. The output have been developed, using additi...

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Low loss soft switching boost converter

Park

Won

et al. 2008

2008 13th International Power Electronics and Motion Control Conference

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A new soft switching boost converter is proposed in this paper. The conventional boost converter generates switching losses at turn on and off. Because of those, the whole system efficiency is reduced. The proposed converter utilizes soft switching method using an auxiliary switch and resonant circuit. Therefore, the converter reduces switching losses lower than the hard switching. The proposed soft switching boost converter can be applied to photovoltaic system, power factor correction and so forth.

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Designing a zero voltage transition boost converter for power factor corrected modular telecom rectifiers

Cited by 5 publications

References 0 publications

Optimized design of a fully soft-switched boost-converter suitable for power factor correction

Optimized design of a fully soft-switched boost-converter suitable for power factor correction

New Fully Soft-Switched Boost-Converter with Reduced Conduction Losses

Low loss soft switching boost converter

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