Fuel Cell Generation System With a New Active Clamping Current-Fed Half-Bridge Converter

Jang, Su-Jin; Won, Chung-Yuen; Lee, Byoung-Kuk; Hur, Jin

doi:10.1109/tec.2006.874208

Cited by 160 publications

(32 citation statements)

References 12 publications

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“…In the steady state, the difference between the increment of i Lr in interval 1 and 3 is the input current I L . The time interval T M3 (t 2 , t 3 ) can be calculated as (7).…”

Section: Steady-state Analysismentioning

confidence: 99%

“…The current-fed twoinductor boost converter (CF-TIBC), which is derived from the duality principle in 1993 by using a transformer-coupled half-bridge converter, is suitable for these applications [4,5]. The CF-TIBC has inherent high reliability and a step-up characteristic, and it can obtain a high input current rating and low input current ripple because the input current flows into the two separated inductors [4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…The voltage spike occurs due to the reverse recovery current of secondary diodes and unavoidable transformer leakage inductance; this is the reason why the conventional CF-TIBC is limited to a switching frequency and power rating. To address these problems, additional snubbers or active clamp circuits have been researched [6][7][8]21]. However, these methods lead to rising production cost and complications of the circuit and deteriorating reliability of the system.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of a Current-fed Two Inductor Bi-directional DC/DC Converter using Resonance for a Wide Voltage Range

Noh¹,

Kim²,

Kim³

et al. 2016

Journal of Electrical Engineering and Technology

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-In this paper, a current-fed two-inductor bi-directional DC/DC converter using resonance (CF-TIBCR) and its design method are proposed. The CF-TIBCR has characteristics of low current ripple and a high current rating because of two separated inductors. Also, it achieves zero voltage switching for all switches and zero current switching for switches of a low voltage stage by using the resonant tank. Besides, a voltage spike problem in conventional current-fed converters is solved without the need for an additional snubber or clamping circuits. As a result, the CF-TIBCR features high step-up and high efficiency. Since the proposed converter has difficulty achieving the softswitching condition when the converter requires the low voltage transfer ratio, a method that varies the number of resonant cycles is adopted to extend the output voltage range with satisfying the softswitching condition. The principles of the operation characteristics are presented with a theoretical analysis, and the proposed converter is verified through results of an experiment using a laboratory prototype.

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“…In the steady state, the difference between the increment of i Lr in interval 1 and 3 is the input current I L . The time interval T M3 (t 2 , t 3 ) can be calculated as (7).…”

Section: Steady-state Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis and Design of a Current-fed Two Inductor Bi-directional DC/DC Converter using Resonance for a Wide Voltage Range

Noh¹,

Kim²,

Kim³

et al. 2016

Journal of Electrical Engineering and Technology

Self Cite

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“…Recently, the ripple current generated from the fuel cells has been issued even in residential and vehicle power applications because this ripple current can propagate through the system, and such a ripple current effect may shorten the fuel cell life and cause a frequent trip due to overcurrent and even harmonics problems. The ripple current suppression is mentioned in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The slide mode control theory was initially carried out for variable structure systems (VSS) [3].…”

Section: Introductionmentioning

confidence: 99%

Elimination of Chattering by Control Strategy Based on the Multiphase Sliding Model Control for Efficient Power Conversion in a DC-DC Circuit

Chen

Kim

2017

Energies

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Abstract:In this paper, a multiphase sliding mode (MPSM) control method with a master-slave structure is proposed and analyzed in order to suppress ripples at input terminals or output terminals in DC/DC converter applications. With the proposed MPSM, the switching frequency of a multiphase DC/DC converter does not need to be operating such a high switching frequency as adopted in a conventional sliding mode control-based DC/DC converter. As a result, switching power losses could be reduced in this converter. Another advantage of this proposed method is that the master-slave multiphase slide control loop could figure out a proper phase shift between each switching phase of a DC/DC converter instead of precalculated phase shift. The proposed concepts are proven by the PSIM computer simulations and the feasibility of the proposed concepts is validated through the test experiments.

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“…Soft-switching is necessary to operate the converter at higher switching frequency to achieve small size, light weight and low cost converter. Although an active-clamped DC-DC current-fed converter and its analysis and design have been recently published [2] [4][5], this converter can not maintain ZVS for wide variation in supply voltage and load variations. Therefore, a modified L-L type active-clamped current-fed ZVS DC-DC converter, shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Small Signal Modeling and Closed Loop Control Design of ZVS Current-fed Half-Bridge L-L Type Dc/Dc Converter with Active-Clamp

Rathore¹,

Bhat²,

Oruganti³

2010

IJCEE

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Abstract-This I. INTRODUCTIONA high-frequency (HF) transformer isolated DC-DC converter is part of a fuel cell power conditioning system for standalone or utility interface [1][2] used to boost low fuel cell stack voltage (that can vary with fuel pressure [3]) higher than the peak of the grid or rated load voltage. This stepped up DC voltage is converted into line-frequency grid/load compatible AC power supply using an inverter stage [1][2]. Soft-switching is necessary to operate the converter at higher switching frequency to achieve small size, light weight and low cost converter. Although an active-clamped DC-DC current-fed converter and its analysis and design have been recently published [2] [4][5], this converter can not maintain ZVS for wide variation in supply voltage and load variations. Therefore, a modified L-L type active-clamped current-fed ZVS DC-DC converter, shown in Fig. 1 has been proposed for this application [6]. This converter always operates with Manuscript received September 20, 2009. This work was supported by a grant from the Natural Sciences and Engineering Research Council (NSERC) of Canada.Akshay K Rathore is with the Department of Electrical and Computer Engineering, University of Illinois, Chicago, IL 60607 USA. (phone: 312-996-9548; e-mail: arathore@ uic.edu).Ashoka K. S. Bhat is with Department of Electrical and Computer Engineering, University of Victoria, Victoria, BC V8W 3P6 Canada. (e-mail: bhat@engr.uvic.ca).Ramesh Oruganti is with the Department of Electrical and Computer Engineering, National University of Singapore, Singapore (e-mail: eleramsh@nus.edu.sg).the duty cycle of main switches greater than 50% and in continuous current mode. The two main switches S 1 and S 2 are controlled by gating signals phase-shifted by 180 o .Auxiliary switches S a1 and S a2 are gated by signals complementary to main switch gating signals. The two inductors are identical but uncoupled to each other.This front-end DC-DC converter should be controlled to produce a constant voltage at the input of the inverter for all fuel pressure values. This requires small signal modeling and closed loop control design of this converter and they are not yet reported in literature and therefore form the objectives of this paper. The peak current control requires slope compensation for stability and introduces error at high ripple currents at light load and high input voltage. Therefore, average current control of the two inductor currents is used in this paper. In literature, the current control of a single inductor and coupled inductor converter topologies are presented [7][8][9][10]. The current control of two independent (uncoupled) inductor topology was presented in [11] for active-clamped ZVS two-inductor current-fed isolated DC-DC converter. Detailed small signal analysis was presented while taking into account the effect of auxiliary clamp circuit [11] for ZVS. The series inductor current state variable was discontinuous (assuming high magnetizing inductance) and therefore, was omitted in the analysis. ...

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Fuel Cell Generation System With a New Active Clamping Current-Fed Half-Bridge Converter

Cited by 160 publications

References 12 publications

Analysis and Design of a Current-fed Two Inductor Bi-directional DC/DC Converter using Resonance for a Wide Voltage Range

Analysis and Design of a Current-fed Two Inductor Bi-directional DC/DC Converter using Resonance for a Wide Voltage Range

Elimination of Chattering by Control Strategy Based on the Multiphase Sliding Model Control for Efficient Power Conversion in a DC-DC Circuit

Small Signal Modeling and Closed Loop Control Design of ZVS Current-fed Half-Bridge L-L Type Dc/Dc Converter with Active-Clamp

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