Boost Converter with Coupled Inductors and Buck-Boost Type of Active Clamp

Wu, T.-F.; Lai, Yu-Ting; Hung, J.-C.; Chen, Yaow-Ming

doi:10.1109/pesc.2005.1581655

Cited by 81 publications

(121 citation statements)

References 3 publications

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“…Moreover, cascading of several conventional boost converters may give higher output voltage but, it requires a larger volume and weight of the capacitance increases. This lowers the efficiency of the system and it is also expensive [7,8]. The voltage lift technique [9,10] may give high gain but the main switch suffers a high transient current and hence the conduction loss is also increased.…”

Section: Mathematical Modeling Of Mic Con-vertermentioning

confidence: 99%

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Investigation of High gain MIC power converter for multicrystal PV module employing fuzzy logic technique

Vengatesh¹,

Rajan²

2016

Automatika

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Original scientific paperA Mutual Inductive Coupled (MIC) DC-DC power converter circuit for Photo-Voltaic (PV) system employing fuzzy logic based maximum power point tracking is presented in this research paper. The proposed DC-DC converter has been modelled and simulated using Matlab-simulink environment for obtaining high gain. The mutually coupled inductor uses one core instead of two or more, which reduces size of the converter. A passive regenerative snubber is exploited for absorbing the energy of stray inductance and also the capacitors are charged in parallel and discharged in series through the mutual coupled inductor for achieving high voltage gain of this converter. The voltage gain characteristics of the MIC converter have been studied for various coupling coefficient, turns ratio of two-winding mutual inductor and duty cycle. Moreover, PV system is conveniently interfaced with proposed power converter for maximizing the solar energy yield and analysed by employing Perturb & Observe (P&O) and fuzzy logic based MPPT algorithms under various operating conditions. The obtained results reveal that, the fuzzy controller provides good improvement in tracking of maximum power and helps to extract considerable amount of additional solar energy from a PV module as compared with P&O algorithm.Key words: Photo-Voltaic system, Perturb & Observe algorithm, Mutual -Inductive Core, Fuzzy Logic Control.Istraživanje pretvarača sa spregnutim me uinduktivitetom za više-kristalne fotonaponske sustave s velikim pojačanjem korištenjem neizrazite logike. U ovome radu prikazan je DC-DC pretvarač sa spregnutim me uinduktivitetom (MIC) za fotonaponske (PV) sustave izveden uz praćenje optimalne radne točke korištenjem neizrazite logike. Predloženi DC-DC pretvarač modeliran je i simuliran korištenjem Matlab-simulink okruženja za velika pojačanja. Spregnuti me uinduktivitet koristi jednu jezgru umjesto dvije ili više njih, što umanjuje veličinu pretvarača. Pasivna regenerativna prigušnica je korištena za apsorpciju energije lutajućih struja te su kondenzatori punjeni u paraleli i pražnjeni u seriji kroz spregnuti me uinduktivitet u svrhu ostvarivanja velikog naponskog pojačanja pretvarača. Karakteritike naponskog pojačanja MIC pretvarača su proučavane za različite koeficijente spregnutosti, omjer zakretaja dvostruko namatanih me uinduktiviteta i trajanje ciklusa. Nadalje, PV sustav je prigodno povezan s predloženim pretvaračem za optimiranje doprinosa solarne energije i analiziran korištenjem algoritma perturbiranja & razmatranja (P&O) te MPPT algoritma zasnovanog na neizrazitoj logici za različite uvjete rada. Rezultati prikazuju da neizraziti regulator pruža napredak u praćenju optimalne radne točke i pomaže pri izlučivanju zamjetne količine dodatne solarne energije iz PV modula u usporedbi s P&O algoritmom.

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Section: Mathematical Modeling Of Mic Con-vertermentioning

confidence: 99%

“…From Fig.4b it is observed that the voltage gain is less sensitive to the coupling coefficient and it can be taken as '1' which further simplifies (8) and (14) as below:…”

Section: Mathematical Modeling Of Mic Con-vertermentioning

confidence: 99%

Investigation of High gain MIC power converter for multicrystal PV module employing fuzzy logic technique

Vengatesh¹,

Rajan²

2016

Automatika

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“…Integrating coupled inductor into the non-isolated dc-dc converter by choosing a suitableturns ratio can increase the voltage gain effectively. In order to absorb the energy stored in leakage inductor, a snubber circuitry is needed which will increase circuit complexity and loss of efficiency [4]. Switched capacitor cell converters can obtain a very high voltage gain, however input current pulsation is a problem and poor load and line voltage regulation.…”

Section: Iiliterature Surveymentioning

confidence: 99%

A Novel ZVS Step up Converter for Renewable Energy Generation Applications

P¹

2015

IJAREEIE

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This paper introduces a novel ZVS step up converter especially for renewable energy generation applications. The proposed converter is consisting of single switch which operates in zero voltage and zero current. Resonant principles are opted for soft switching. High voltage gain is obtained by switched capacitor cell topology.Use of single switch will reduce the cost of conversion and complexity of control circuits. The circuit topology consisting of resonant inverter with zero voltage switching with an energy blocking diode having zero current switching. The energy blocking diode with DC output filter filters the output stage of converter. KEYWORDS:Switched capacitor, Resonant power converter, zero-current switching, zero-voltage switching, pulsewidth modulation I.INTRODUCTIONNow a days, global surface temperatures have increased drastically, because the global warming is taking place due to effluent gas emissions and increases in Carbon Monoxide. To prevent these effects, some potential solutions have evolved including energy conservation through improved energy efficiency, a reduction in fossil fuel use and an increase in environmental friendly energy sources. However, the output voltage of these sources is too low and which requires a voltage boost. In this stage, efficiency of conversion is a major concern. Efficiency in the sense minimizing the switching and conduction losses. II.LITERATURE SURVEYIn transformer isolated dc-dc converters, by increasing the turns ratio, we can boost the voltage gain. But, when we increase the turns ratio, leakage inductance will also increase, which will lead to high voltage stress and poor efficiency [1].In case of non-isolated dc-dc converter topologies, boost converter is using for voltage boost up. But duty cycle limitation is the problem associated. As duty cycle increases, inductor current ripple and turn off current of the power device will increase, which leads to large conduction loss and degraded efficiency [ 2 ]. Cascaded boost converters can increase the voltage gain, however component count will increase hence size and cost of converter also [3]. Integrating coupled inductor into the non-isolated dc-dc converter by choosing a suitableturns ratio can increase the voltage gain effectively. In order to absorb the energy stored in leakage inductor, a snubber circuitry is needed which will increase circuit complexity and loss of efficiency [4]. Switched capacitor cell converters can obtain a very high voltage gain, however input current pulsation is a problem and poor load and line voltage regulation. Incorporating switched capacitor structure into switching mode dc-dc converter is a good remedy for this problems. Hence we can dramatically increase voltage gain with an appropriate duty cycle with good voltage regulation and minimum input current pulsation [5].Pulse width modulationis the simplest method for controlling power semiconductor switches.PWM power converters can now operate at a much higher switching frequency hence reducing the size of passive co...

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“…The insulated gate bipolar transistor (IGBT) has short switching times and low on-state conduction losses, it is suitable for high blocking voltage applications. In this paper, the IGBTs are used as the main switching elements [8]. …”

Section: High Voltage Power Supplymentioning

confidence: 99%

Buck-current-fed zero current switching converter for high voltage coupled cavity

Lin

2012

IEICE Electron. Express

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This paper presents a design of buck-current-fed fullbridge zero current switching converters which are suitable for highpower high-voltage DC applications. This study shows the capability of incorporating the step-up transformer parasitic components to get the zero current turn-off characteristics for full-bridge switches. The buck stage of the converter uses pulse-width-modulation control to regulate the output voltage and the full-bridge stage operates at a constant on time mode to implement soft-switching commutations. In this study, the converter model is derived, and this model is implemented in an IsSpice circuit, which can reveal the transient characteristics of the converter. Steady state analysis of the converter is also presented. Finally, the simulation results of this converter for the application of coupled cavity traveling wave tube are given and major design issues are discussed.

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Boost Converter with Coupled Inductors and Buck-Boost Type of Active Clamp

Cited by 81 publications

References 3 publications

Investigation of High gain MIC power converter for multicrystal PV module employing fuzzy logic technique

Investigation of High gain MIC power converter for multicrystal PV module employing fuzzy logic technique

A Novel ZVS Step up Converter for Renewable Energy Generation Applications

Buck-current-fed zero current switching converter for high voltage coupled cavity

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