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Proceedings ArticleDOI: 10.1109/ICCPEIC.2015.7259484

Analysis of high voltage gain DC-DC boost converter for renewable energy applications

22 Apr 2015-pp 0320-0324
Abstract: This paper proves worth with a single switch (non-isolated) with less duty cycle, with reduced voltage stress and lower voltage rating of MOSFET having less R DS -ON, reduced switching loss, a very high voltage gain has been achieved. The topology proposed works the same, under any change in load conditions. The modes of operation and the steady state analysis of the proposed dc-dc converter topology has been discussed and derived. The theoretical voltage gain has been proved with simulation results using PSIM simulation software for the proposed converter topology.

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Topics: Forward converter (66%), Ćuk converter (65%), Boost converter (64%) ...read more
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Journal ArticleDOI: 10.1515/IJEEPS-2017-0250
Abstract: Abstract In this paper, a non-isolated buck-boost dc/dc converter with only one switch is presented. The proposed converter consists of one switch in the input side (S), four inductors, four diodes, six capacitors and a capacitor in the output side (Co). In fact, the combination of the inductor, diode and capacitor leads voltage level is increased. Actually, the voltage stress on power switch is decreased for higher power limits at various duty-cycles by combining these components. Therefore, conduction losses can be reduced by using a switch with lower resistance RDS(ON). Another advantage of the proposed converter is that the normalized voltage stress on diodes is low. As a result, the efficiency of proposed converter is high. In order to investigate the competences of the proposed converter, comparison results with other structures are provided. The principle of operation, theoretical analysis and the experimental prototype of proposed converter in about 120 W with operating at 25 kHz are provided.

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Topics: Buck–boost converter (65%)

9 Citations


Proceedings ArticleDOI: 10.1109/ICEAST.2018.8434428
04 Jul 2018-
Abstract: Currently, there are a lot of renewable energy potential research focusing on the potential of photovoltaic and fuel cell. However, the main problem in photovoltaic and fuel cell application is only able to generate low output voltage. In order to increase the voltage, converter device is required before applied to the load. The dc-dc boost converter is one kind of converter which used for increasing output voltage. However, a conventional boost converter is only optimally worked in 2–3 times conversion rate of the input voltage, so this converter can not supply the load with high voltage rate. This research implements high voltage gain converter based on B×B topology for fuel cell application. The advantages of high voltage gain dc-dc boost converter is having conversion rate and high efficiency also has a simple implementation and it will be compatible to be applied in renewable energy sources with dc low voltage, such as photovoltaic and fuel cell. From the implementation results, the high gain dc-dc converter can improve the voltage gain about 4.5 times and able to be implemented with fuel cell application.

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Topics: Boost converter (72%), Low voltage (60%), High voltage (56%) ...read more

3 Citations

References
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Journal ArticleDOI: 10.1109/TPEL.2002.807188
Abstract: Many applications call for high step-up DC-DC converters that do not require isolation. Some DC-DC converters can provide high step-up voltage gain, but with the penalty of either an extreme duty ratio or a large amount of circulating energy. DC-DC converters with coupled inductors can provide high voltage gain, but their efficiency is degraded by the losses associated with leakage inductors. Converters with active clamps recycle the leakage energy at the price of increasing topology complexity. A family of high-efficiency, high step-up DC-DC converters with simple topologies is proposed in this paper. The proposed converters, which use diodes and coupled windings instead of active switches to realize functions similar to those of active clamps, perform better than their active-clamp counterparts. High efficiency is achieved because the leakage energy is recycled and the output rectifier reverse-recovery problem is alleviated.

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Topics: Converters (55%), Charge pump (54%), Leakage (electronics) (52%) ...read more

938 Citations


Open accessJournal ArticleDOI: 10.1109/63.65013
01 Jan 1991-
Abstract: Compared to basic converter topologies (buck, boost, buck-boost, Cuk, etc.), pulse-width modulation (PWM) converters with quadratic DC conversion ratios, M(D)=D/sup 2/, M(D)=D/sup 2//(1-D) or M(D)=D/sup 2//(1-D)/sup 2/, offer a significantly wider conversion range. For a given minimum ON-time and, consequently, for a given minimum duty ratio D/sub min/, D/sup 2/ in the numerator of M(D) yields a much lower limit on the minimum attainable conversion ratio. By applying a systematic synthesis procedure, six novel single-transistor converter configurations with quadratic DC conversion ratios are found. The simpler, single-transistor realization is the most important advantage over the straightforward cascade of two basic converters. As far as conversion efficiency is concerned, it is clear that a single-stage converter is usually a better choice than a two-stage converter. The quadratic converters proposed are intended for applications where conventional single-stage converters are inadequate-for high-frequency applications where the specified range of input voltages and the specified range of output voltages call for an extremely large range of conversion ratios. >

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Topics: Ćuk converter (57%), Boost converter (55%), Buck converter (54%) ...read more

605 Citations


Journal ArticleDOI: 10.1109/63.988825
Xiaogang Feng1, Jinjun Liu2, Fred C. Lee2Institutions (2)
Abstract: In a DC distributed power system, the interaction between individually designed power modules/subsystems may cause the instability of the whole system. In a small-signal sense, system level stability is determined by the impedance ratio Z/sub o//Z/sub i/. Here, Z/sub o/ is the output impedance of the source module/subsystem, and Z/sub i/ is the input impedance of the load module/subsystem. As a result, an effective way to prevent system instability is defining impedance specifications for modules/subsystems. This paper briefly summarizes existing works and introduces the authors' contribution in defining impedance specifications. A new forbidden region for impedance ratio Z/sub o//Z/sub i/ on the S-plane is proposed as the system stability margin requirement. Based on this proposed forbidden region, the impedance specifications of individual loads are established. Further, a very practical measurement approach is developed to examine whether or not the system stability margin requirement of the forbidden region is satisfied.

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Topics: Damping factor (63%), Impedance bridging (62%), Dual impedance (62%) ...read more

487 Citations


Journal ArticleDOI: 10.1109/63.484429
20 Jun 1994-
Abstract: Flyback derived power convertor topologies are attractive because of their relative simplicity when compared with other topologies used in low power applications. Incorporation of active-clamp circuitry into the flyback topology serves to recycle transformer leakage energy while minimizing switch voltage stress. The addition of the active-clamp circuit also provides a mechanism for achieving zero-voltage-switching (ZVS) of both the primary and auxiliary switches. ZVS also limits the turn-off di/dt of the output rectifier, reducing rectifier switching losses, and switching noise due to diode reverse recovery. This paper analyzes the behavior of the ZVS active-clamp flyback operating with unidirectional magnetizing current and presents design equations based on this analysis. Experimental results are then given for a 500 W prototype circuit illustrating the soft-switching characteristics and improved efficiency of the power converter. Results from the application of the active-clamp circuit as a low-loss turn-off snubber for IGBT switches is also presented.

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Topics: Flyback converter (68%), Flyback diode (66%), Flyback transformer (65%) ...read more

385 Citations


Open accessProceedings ArticleDOI: 10.1109/APEC.2000.822834
Laszlo Huber1, Milan M. JovanovicInstitutions (1)
06 Feb 2000-
Abstract: Present specifications for computer power supplies for networking applications call for designs with dual inputs: the universal AC-line input and the 48-V nominal DC input. In this paper, a design and evaluation of the DC-input version of a 900-W server power supply is presented. The AC-input version of this power supply is leveraged from the AC-input version by using the same output stage, and by replacing the AC front-end in the AC-input version with a DC front end which provides the same input voltage to the output stage. By adopting this design approach, it is possible to achieve design modularity, design standardization, minimize the design time, optimize utilization of resources, and minimize the cost. The DC-input version uses a cascade connection of two DC boost converters because of its superior performance compared with other topologies.

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  • Fig. 1 Block diagram of (a) ac-input version and (b) dc-input version of computer power supplies for networking applications. Note that the dc/dc output stage is the same in both versions.
    Fig. 1 Block diagram of (a) ac-input version and (b) dc-input version of computer power supplies for networking applications. Note that the dc/dc output stage is the same in both versions.
  • TABLE II MEASURED PERFORMANCE OF STAND-ALONE SECOND BOOST STAGE (Vo2 = 375 V, Po2 = 1200 W, Tamb = 24oC)
    TABLE II MEASURED PERFORMANCE OF STAND-ALONE SECOND BOOST STAGE (Vo2 = 375 V, Po2 = 1200 W, Tamb = 24oC)
  • TABLE I MEASURED PERFORMANCE OF STAND-ALONE FIRST BOOST STAGE (Vi1 = 40 V, Po1 = 1250 W, Tamb = 24oC)
    TABLE I MEASURED PERFORMANCE OF STAND-ALONE FIRST BOOST STAGE (Vi1 = 40 V, Po1 = 1250 W, Tamb = 24oC)
  • TABLE IV MEASURED PERFORMANCE OF TWO CASCADED BOOST STAGES (Vo1 = 115 V, Vo2 = 375 V Po2 = 1200 W, Tamb = 24oC)
    TABLE IV MEASURED PERFORMANCE OF TWO CASCADED BOOST STAGES (Vo1 = 115 V, Vo2 = 375 V Po2 = 1200 W, Tamb = 24oC)
  • TABLE III MEASURED PERFORMANCE OF TWO CASCADED BOOST STAGES (Vi1 = 40 V, Vo2 = 375 V Po2 = 1200 W, Tamb = 24oC)
    TABLE III MEASURED PERFORMANCE OF TWO CASCADED BOOST STAGES (Vi1 = 40 V, Vo2 = 375 V Po2 = 1200 W, Tamb = 24oC)
  • + 6

171 Citations


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