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D. Ashok* et al. (IJITR) INTERNATIONAL JOURNAL OF INNOVATIVE TECHNOLOGY AND RESEARCH Volume No.4, Issue No.5, August – September 2016, 4181-4183. A Unique Modulator For Boost Regulator To Reduce The Voltage Stress D.ASHOK G.M
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  D. Ashok* et al. (IJITR) INTERNATIONAL JOURNAL OF INNOVATIVE TECHNOLOGY AND RESEARCH Volume No.4, Issue No.5, August –  September 2016, 4181-4183.   2320  – 5547 @ 2013-2016 http://www.ijitr.com All rights Reserved. Page | 4181 A Unique Modulator For Boost Regulator To Reduce The Voltage Stress D.ASHOK M.Tech Student, Dept of EEE Indur Institute Of Engineering & Technology Siddipet, T.S, India G.MALLESH KUMAR Assistant Professor, Dept of EEE Indur Institute Of Engineering & Technology Siddipet, T.S, India ASHRAD MOHAMMED Associate Professor, Dept of EEE Indur Institute Of Engineering & Technology Siddipet, T.S, India V.HARINATH Assistant Professor, Dept of EEE Indur Institute Of Engineering & Technology Siddipet, T.S, India  Abstract: The APS control can be used to lessen the current force on switches see how to avoid load as the traditional interleaving control can be used to help keep better performance in heavy load. This paper looks into a manuscript pulse width modulation (PWM) plan for 2-phase interleaved boost ripper tools with current multiplier for fuel cell power system by mixing alternating phase shift (APS) control and traditional interleaving PWM control. To be able to reduce output fuel cell stack output current ripple or even the electricity/electricity ripper tools input current ripple, whether passive filter or active filter may be used, however, this will raise the complexity from the system. The boundary condition for swapping between APS and traditional interleaving PWM control comes. In line with the aforementioned analysis, a complete power range control mixing APS and traditional interleaving control is suggested. Loss breakdown analysis can also be given look around the efficiency from the ripper tools. Finally, it's verified by experimental results. The whole process of a switching cycle from the ripper tools could be split into six stages at boundary condition that the current force on switch is going to be bigger than 1 / 2 of the output current with traditional interleaving control.    Keywords:   Boost Converter; Fuel Cell; Interleaved; Loss Breakdown; Voltage Multiplier; I.   INTRODUCTION Fuel cell is among promising choices because of its  benefits of zero emission, low noise, greater power density, and being easily modularized for portable  power sources, electric automobiles, distributed generation systems, etc. A higher step-up electricity/electricity ripper tools is required for that system. The electricity/electricity ripper tools will produce a high frequency input current ripple that will lessen the existence duration of the fuel cell stack. High step-up ratio could be accomplished by mixing classical boost ripper tools with switched inductors, combined inductors, high-frequency transformer, or switched capacitor [1] [2]. They are able to obtain high step-up ratio rich in efficiency, low-current stress, and occasional electromagnetic interference. To be able to reduce output fuel cell stack output current ripple or even the electricity/electricity ripper tools input current ripple, whether passive filter or active filter may be used, however, this will raise the complexity from the system. Actually, interleaving the electricity/electricity ripper tools can help to eliminate the input current ripple from the electricity/electricity ripper tools. An interleaved  boost ripper tools with current multiplier was suggested. The ripper tools proven in Fig. 2 are capable of low-current stress within the power  products, which boosts the conversion efficiency. However, this really is only true in heavy load once the current stress from the power products might increase if this works in discontinuous passing mode [3]. This paper looks into a manuscript PWM  plan for 2-phase interleaved boost ripper tools with current multiplier for fuel cell power system by mixing APS and traditional interleaving PWM control. The APS control can be used to lessen the current force on switches see how to avoid load as the traditional interleaving control can be used to help keep better performance in heavy load. The  boundary condition for swapping between APS and traditional interleaving PWM control comes. In line with the aforementioned analysis, a complete  power range control mixing APS and traditional interleaving control is suggested. Loss breakdown analysis can also be given look around the efficiency from the ripper tools. Finally, it's verified by experimental results. Fig.1.Block diagram of proposed system  D. Ashok* et al. (IJITR) INTERNATIONAL JOURNAL OF INNOVATIVE TECHNOLOGY AND RESEARCH Volume No.4, Issue No.5, August –  September 2016, 4181-4183.   2320  – 5547 @ 2013-2016 http://www.ijitr.com All rights Reserved. Page | 4182 II.   PROPOSED SYSTEM The assumption is that components within the ripper tools are perfect, both capacitor C1 and C2 are big enough, and duty cycle is under .5. The whole process of a switching cycle from the ripper tools could be split into six stages at boundary condition that the current force on switch is going to be bigger than 1 / 2 of the output current with traditional interleaving control. The boundary constraint with traditional interleaving control made the decision. Because the switching period TS and also the input inductor L are made at nominal operation in continuous passing mode (CCM), the constraint is dependent upon duty cycle D and also the load R. Exactly why there's two  parts within the boundary constraint would be that the duty cycle D varies using the load once the ripper tools works in DCM. For any given application, the current gain from the electricity/electricity ripper tools is decided. After which, the minimum duty cycle that may maintain low-current stress in primary power products with traditional interleaving control will be presented [4]. Within our 1-kW prototype design, the input current from the ripper tools is 86-107 V, and also the output current from the ripper tools is 700 V. The current gain will be different from n1 = 6.54 to n2 = 8.14, and so the circuit parameters at  boundary conditions Kcrit will be different from Kcrit1 = .013 to Kcrit2 = .0083. Based on the  principle of APS, APS control is suggested to resolve the sunshine load trouble with duty cycle under .5. Using the load growing, the job cycle is going to be elevated too. Once the duty cycle is elevated to .5, the APS control is going to be modified to become traditional interleaving control with halved switching frequency. Based on  previous analysis, the minimum duty cycle to attain low-current force on switches with traditional interleaving control is under .5. Therefore, you'll be able to combine both APS control and traditional interleaving control to manage the ripper tools for full power range operation. The swapping between your APS control and traditional interleaving control in the region Dm1 = D = Dm2 is accomplished by discovering the current stress from the switch S1. To have better dynamic  performance operation, dual loop control is adopted, where the inner current loop would be to control the input inductor current as the outer current loop would be to control the output current. Kip and Kii would be the PI controller parameters from the inner current loop, while Kvp and Kvi would be the PI controller parameters from the outer current loop. As the price of fuel cell continues to be high, you should increase the efficiency from the power ripper tools for fuel cell- based power system to be able to reduce its operation cost while increasing the effective use of fuels. Therefore, loss breakdown analysis is required. The nominal power the ripper tools is 1 kW for loss breakdown analysis and prototype setup, and also the input current is 100 V as the output current is 700 V with switching frequency. The ripper tools may also be employed in boundary  passing mode (BCM) at nominal load with input current ripple ratio (r = .6) and also the inductor L1 and L2 is 714.3 µH. The inductor is made using the amorphous core. The primary areas of losing likewise incorporate the passing loss (Pcon S ) from the IGBT. The experimental results at  boundary condition, that is in compliance using the theoretical waveform [5]. The experimental answers are provided to verify the prior analysis. To be able to test the dynamic performance from the ripper tools with fuel cell as input, the ripper tools are attached to the creation of the PEMFC. Once the load differs from 3478 O to 1658 O, the output current from the fuel cell will differs from 99.1 to 93.7 V, the control plan will swap from APS control to traditional interleaving control, the current stress of power switches keeps 1 / 2 of the output current throughout load variation, and also the output current from the ripper tools keeps 700 V in stable operation underneath the two load. Therefore, the suggested APS control can boost the lifetime and longevity of capacitors C1 and C2. The control plan will swap from traditional interleaving control to APS control, and also the current stress of power switches keeps 1 / 2 of the output current too. Therefore, the control plan suggested within this paper could achieve halved current force on switches when swapping between traditional interleaving control and APS control. III.   CONCLUSION To be able to reduce output fuel cell stack output current ripple or even the electricity/electricity ripper tools input current ripple, whether passive filter or active filter may be used, however, this will raise the complexity from the system. The  boundary condition comes after stage analysis within this paper. The boundary condition classifies the operating states into two zones, i.e., Zone A and Zone B. The standard interleaving control can be used in Zone some time APS control can be used in Zone B. And also the swapping function is accomplished with a logic unit. The whole process of a switching cycle from the ripper tools could be split into six stages at boundary condition that the current force on switch is going to be bigger than 1 / 2 of the output current with traditional interleaving control. Using the suggested control  plan, the ripper tools are capable of low current force on switches in most power selection of the  burden that is verified by experimental results. IV.   REFERENCES [1] S. Lee, P. Kim, and Sewan Choi, “High step-up soft-switched converters using  D. Ashok* et al. (IJITR) INTERNATIONAL JOURNAL OF INNOVATIVE TECHNOLOGY AND RESEARCH Volume No.4, Issue No.5, August –  September 2016, 4181-4183.   2320  – 5547 @ 2013-2016 http://www.ijitr.com All rights Reserved. Page | 4183 voltage multiplier cells,” IEEE Trans. Power Electron., vol. 28, no. 7, pp. 3379  –  3387, Jul. 2013. [2] S. K. Mazumder, R. K. Burra, and K. Acharya, “A ripple -mitigating and energy-efficient fuel cell power-conditioning system,” IEEE Trans. Power Electron., vol. 22, no. 4, pp. 1437  –  1452, Jul. 2007. [3] L. Wuhua, F. Lingli, Z. Yi, H. Xiangning, X. Dewei, and W. Bin, “Highstep -up and high-efficiency fuel-cell power-generation system with activeclamp flyback-forward converter,” IEEE Trans. Ind. Electron., vol. 59, no. 1, pp. 599  –  610, Jan. 2012. [4] R. Gules, L. L. Pfitscher, and L. C. Franco, “An interleaved boost DC–  DC converter with large conversion ratio,” in Proc. IEEE Int. Symp. Ind. Electron., 2003, pp. 411  –  416. [5] G. Fontes, C. Turpin, S. Astier, and T. A. Meynard, “Interactions between  fuel cells and power converters: Influence of current harmonics on a fuel cell stack,” IEEE Trans. Power Electron., vol. 22, no. 2, pp. 670  –  678, Mar. 2007.
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