Improved active power factor correction circuit using a fully soft-switched boost converter

Saha, Shib Sankar; Majumdar, B. C.; Biswas, Sujit K.

doi:10.1049/iet-pel.2010.0079

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…Conventional hard-switched pulse-width modulated (PWM) converters suffer from the drawbacks of high switching loss, high device stress and objectionable EMI, if operated with high switching frequency. Soft-switching PWM techniques have been successfully used by many researchers (Jiang et al, 2013(Jiang et al, , 2014Lin, 2017;Patil et al, 2011;Qian et al, 2016;Saha, 2011;Saha et al, 2011) to make modern switch mode power supply (SMPS) more compact with large power to volume ratio by high switching frequency operation and simultaneously maintaining high efficiency. The switching devices of soft-switching converters change their state, either when the voltage across them is zero (zero-voltage switching, ZVS) or when the current through them is zero (zero-current switching, ZCS).…”

Section: Introductionmentioning

confidence: 99%

Soft-switched high step-up DC/DC boost converter for distributed generation

Saha

2021

IJPELEC

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Conventional boost converters are practically operated with maximum voltage gain of 5, as an extremely large duty cycle in excess of 80% results in reverse recovery problem of boost diode and large conduction losses in power devices, inductors and filter capacitors. High step-up boost converters, as required in distributed generation systems using green energy sources, are nowadays drawing prime attention of power electronics engineers. In recent years, wide research is going on to operate the switching devices under soft-switched condition, so that, the converters can be made more compact by operating at high switching frequency and simultaneously maintaining high efficiency. In present work, a new soft-switched high step-up coupled-inductor boost converter is proposed to meet the demands of distributed generation systems. Performance of the proposed converter is verified by a prototype laboratory model and behaviour of the converter is found to confirm the theoretical analysis.

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Section: Introductionmentioning

confidence: 99%

Soft-switched high step-up DC/DC boost converter for distributed generation

Saha

2021

IJPELEC

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“…These efficient high power converters usually require continuous current mode (CCM) operation in grid-tied applications [7]. The high power density and efficiency requirement can be fulfilled by increased switching frequency [8,9]. However, drawbacks associated with switching frequency including switching losses and electromagnetic interference (EMI) must be addressed.…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Ali¹,

Jiang²,

Khan³

et al. 2020

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The increased power density, reduced switching losses with minimum electromagnetic interference (EMI), and high efficiency are essential requirements of power converters. To achieve these characteristics, soft power converters employing soft switching techniques are indispensable. In this paper, a ZCS/ZVS PWM AC/DC converter topology has been emphasized, which finds applications in high power systems such as automobile battery charging and renewable energy systems. This converter scheme maintains zero current and zero voltage switching conditions at turn on and turn off moments of semiconductor switches, respectively and soft operation of rectifier diodes that lead to negligible switching and diode reverse recovery losses. Moreover, it improves power quality and presents high input power factor, low total harmonic distortion of the input current (THD I ) and improved efficiency. The validity of theoretical analysis of the proposed converter has been carried out experimentally on a 10 kW laboratory prototype. Experimental results prove that the soft switching operation of the semiconductor switches and diodes is maintained at 98.6% rated load efficiency. In addition, the performance evaluation has been performed by comparative analysis of the proposed converter with some prior art high power AC/DC converters. Efficiencies of the proposed and prior art high power topologies have been determined for different load conditions. The highest efficiency, power factor and lower THD I of the proposed converter topology complies with international standards.

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“…Step-up converter is widely used in industry when it is required to create a higher regulated voltage. The conventional applications are fuel cell [1,2], photovoltaic system [2][3][4][5][6][7], high-efficiency converter [7,8], high power application [9][10][11][12], battery charger [6,13] and powerfactor-correction circuit [6,9,10,[13][14][15][16]. In today's modern applications, it is essential to enhance the converter efficiency and its power-density.…”

Section: Introductionmentioning

confidence: 99%

New resonant LCL boost converter

Jabbari¹,

Barati²

2014

IET Power Electronics

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This study presents a new soft-switching resonant step-up converter. An auxiliary high-frequency resonant LC tank along with a switch constitute the auxiliary network added to the classic pulse width modulation (PWM) boost converter. Size of the main inductor of boost converter is also reduced, so that in conjunction with the auxiliary LC tank forms an LCL resonant network. This network provides zero-current switching (ZCS) conditions for both switches independent from the load-current and operating voltages. The converter can operate at ZCS in discontinuous conduction mode, continuous conduction mode (CCM) and deep-CCM depending on the switching frequency; and, at deep-CCM, the current stresses are minimised. Experimental results from a 100 W/100 kHz laboratory prototype verify the integrity of the presented theoretical analysis.

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Improved active power factor correction circuit using a fully soft-switched boost converter

Cited by 9 publications

References 11 publications

Soft-switched high step-up DC/DC boost converter for distributed generation

Soft-switched high step-up DC/DC boost converter for distributed generation

Bulletin of the Polish Academy of Sciences: Technical Sciences

New resonant LCL boost converter

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