iosr-JEEE   International Conference on Emerging Trends in Engineering & Management

Abstract: Information about the relative stability of a control system is of paramount importance for any design problem. In this paper two algebraic criteria for the relative stability analysis of linear time-invariant systems are formulated. When the relative stability analysis is done based on the damped frequency of oscillation, characteristic equations with complex coefficients arise. These complex coefficients are used in two different ways to form the Modified Routh's tables for the two schemes named as Sign Pair Criterion I and Sign Pair Criterion II .It is found that the proposed algorithms offer computational simplicity compared to other algebraic methods and is illustrated with suitable examples.
Keywords - Stability analysis, complex coefficients, Sign pair criterion, Routh's Table, Relative stability

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Abstract: This paper proposes a new closed loop bridgeless single phase AC-DC pseudoboost converter based
electronic ballast is introduced for compact fluorescent lamps (CFL). Compared to existing topologies of single
phase bridgeless system the proposed topology has benefits of closed loop error checking, lesser components,
higher power density and lesser conduction losses due to the absence of an input diode in the current path
during each stage of switching cycle which in turn results in an improved thermal management property[1]-[8].
Proposed topology is designed to work in resonant mode to achieve automatic power factor correction close to
that of unity in a simpler and effective manner.

[1] B. Su, J. Zhang, and Z. Lu, "Totem-pole boost bridgeless PFC rectifierwith simple zero-current detection and full-range ZVS operating
at theboundary of DCM/CCM," IEEE Trans. Power Electron., vol. 26, no. 2,pp. 427–435, Feb. 2011
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conduction andswitching losses," IEEE Trans. Ind. Appl., vol. 47, no. 2, pp. 873–881,Mar./Apr. 2011.
[4] AshishShrivastavaand Bhim Singh, "Improved Power Quality Based Electronic Ballast for aFluorescent Lamp with Constant DC Link
Voltage,"Asian Power Electronics Journal, Vol. 6, No. 1, Oct 2012.
[5] FariborzMusavi, Wilson Eberle, William G.Dunford,"A Phase-Shifted Gating Technique With Simplified Current Sensing for the
Semi-Bridgeless AC–DC Converter,"IEEE Trans. Power Electron., vol. 62, no. 4, pp. 775–780, May 2013.
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Abstract: This paper proposes a new Nine Level Inverter for a photovoltaic system. The nine- level inverter is configured using a capacitor selection circuit and a full-bridge power converter, connected in cascade. Since the output of PV array is very low, a DC –DC converter is used to boost the output of PV array. The DC-DC power converter consists of DC-DC boost converter and a transformer to convert the output voltage of the PV array into three independent voltage sources with multiple relationships. The capacitor selection circuit in the nine-level inverter converts the three output voltage sources of DC–DC power converter into a four-level DC voltage, and the full-bridge power converter further converts this four-level DC voltage into a nine-level AC voltage. In this way, the proposed system can generates a sinusoidal output current that is in phase with the utility voltage and is fed into the utility.

[1] R. Dugan, T. McDermott, "Distributed generation," IEEE Ind. Appl. Mag., vol. 8, no. 2, pp. 19-25, Mar./Apr. 2002.
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voltage control," IEEE Trans. Ind. Informat., vol. 8, no. 2, pp. 241–254, May. 2012.
[3] N. Mohan, T. M. Undeland, and W. P. Robbins, "Power Electronics Converters, Applications and Design", Media Enhanced 3rd
ed. New York,NY, USA: Wiley, 2003.
.[4] J.-M. Shen, H. L. Jou, and J. C. Wu, "Novel transformer-less grid connected power converter with negative grounding for
photovoltaic generation system," IEEE Trans. Power Electron., vol. 27, no. 4, pp. 1818– 1829, Apr. 2012.
[5] Jinn-Chang Wu, Member, IEEE, and Chia-Wei Chou," A Solar Power Generation System With a Seven-Level Inverter", IEEE
Trans. on power electronics, vol. 29, no. 7, july 2014

Abstract: This paper presents an Isolated Two Stage Power Factor Corrected (PFC) Converter as a costeffective solution for low-power BLDC motor drive applications. An approach of speed control of the BLDC motor by controlling the dc link voltage of the voltage source inverter (VSI) is used by the proposed PFC converter. The first stage consists of a canonical switching cell converter which is an ac-dc converter. The second stage consists of a flyback converter which provides isolation for the drive. A two stage PFC converter is designed to operate in discontinuous inductor current mode (DICM) to provide an inherent PFC at ac mains. An open loop control method using PIC microcontroller and 555 timer is used here for the control action of the converter. The performance of the proposed drive is evaluated over a wide range of DC link voltage with improved power quality at ac mains. The performance of the proposed drive is simulated in MATLAB/Simulink environment.
Keywords— BLDC motor, Canonical switching cell converter, Continuous conduction mode, discontinuous inductor current mode (DICM), Flyback converter, power factor corrected (PFC)

[1]. Vashist Bist and Bhim singh "A PFC based BLDC motor drive using a canonical switching cell converter", IEEE transactions
on Industrial informatics Vol 10, No 2 May 2014.
[2]. Vashist Bist and Bhim singh "A Unity power factor Bridgeless isolated Cuk converter- fed brushless DC motor drive" IEEE
transactions on industrial electronics vol 62, No 7 July 2015.
[3]. Vashist Bist, Student Member IEEE and Bhim Singh, Fellow, IEEE "An Adjustable-Speed PFC Bridgeless Buck–Boost
Converter-Fed BLDC Motor Drive" IEEE 2014.
[4]. Y. Chen, C. Chiu, Y. Jhang, Z. Tang, and R. Liang, "A driver for the single-phase brushless dc fan motor with hybrid winding
structure," IEEE Trans. Ind. Electron., vol. 60, no. 10, pp. 4369–4375, Oct. 2013.
[5]. Vashist Bist, Student Member IEEE and Bhim Singh, Fellow, IEEE "A Brushless DC Motor Drive with Power Factor
Correction using Isolated-Zeta Converter IEEE 2013.
[6]. Vashist Bist, Student Member IEEE and Bhim Singh, Fellow, IEEE "PFC Cuk Converter Fed BLDC Motor Drive IEEE 2013.

Abstract: Due to recent developments in the area of power electronics, semi-conductor based inverters have been widely used in variable frequency drive applications. The speed control of various industrial drives is achieved by controlling the power semi-conductor switches in the inverters. Three phase inverters with six switches- Six Switch Three Phase Inverter (SSTPI) have been conventionally used over years. In order to reduce the switch count and thereby switching losses Four Switch Three Phase Inverters (FSTPI) have been
introduced. In this paper, a closed loop speed control of SSTPI and FSTPI fed PMSM based on SVPWM is presented. Compared to conventional PWM techniques, SVPWM is the most promising technology in the field of variable frequency drives.

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Abstract: In this paper, a voltage-boosting converter based dual output switched mode power supply is presented. This converter is a combination of KY and synchronous BUCK-BOOST converter. High voltage gain is enhanced by using coupled inductor with turns ratio and one charging pump. The output current of the converter is non pulsating, hence the voltage stress across the output capacitor is very less. The proposed Switched mode power supply is specially designed for low power applications as it is having a KY Buck-Boost converter front end. As multiple outputs at low power levels are obtained, it can be used for low power applications with a high efficiency. Transformer is being used for energy storage and transfer device in SMPS. The converter has only two switch which is controlled using a voltage follower approach. The advantages of the SMPS are high efficiency, improved power factor and reduced number of components. The proposed concepts have been verified using MATLAB simulations.
Keywords: Buck-Boost converter, Charging pump, Coupled inductor, KY converter, switched mode power supply

[1] R. W. Erickson and D. Maksimovic, Fundamentals of Power Electronics, 2nd ed. Norwell, MA, USA: Kluwer, 2001.
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Abstract: This paper develops a novel single switch step up converter adopting switched capacitor cell for renewable energy generation applications. By integrating the advantages of resonant conversion and switched capacitor cell topology energy efficient high voltage gain can be achieved. Single switch topology will reduce the cost of conversion and complexity of control circuits. The circuit topology consisting of resonant converter 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. Integration of switched capacitor cell topology will boost the output voltage. The basic idea of switched capacitor cell is that, when the switch is off, the energy released from the inductor is used to charge the capacitors in parallel. When the switch is on, the capacitors are connected in series to supply the load.

[1]. W. Li and X. He, ―Review of nonisolated high-step-up dc/dc convertersin photovoltaic grid-connected applications,‖ IEEE
Trans. Ind. Electron.,vol. 58, no. 4, pp. 1239–1250, Apr. 2011.
[2]. . Lee, T. Liang, and J. Chen, ―Isolated coupled-inductor-integrated dc–dcconverter with nondissipativesnubber for solar energy
applications,‖IEEE Trans. Ind. Electron., vol. 61, no. 7, pp. 3337–3348, Jul. 2014.
[3]. D. Meneses, F. Blaabjerg, O. Garcia, and J. A. Cobos, ―Reviewand comparison of step-up transformerless topologies for
photovoltaicAC—Module application,‖ IEEE Trans. Power Electron., vol. 28, no. 6,pp. 2649–2663, Jun. 2013.
[4]. M. Prudente, L. L. Pfitscher, G. Emmendoerfer, E. F. Romaneli, and R. Gules, ―Voltage multiplier cells applied to non-isolated
dc–dc converters,‖ IEEE Trans. Power Electron., vol. 23, no. 2, pp. 871–887, Mar. 2008.
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Abstract: In this paper, a novel transformerless high voltage gain dc converter supplying single phase full bridge inverter is proposed. The proposed topology contains a converter section and an inverter section. The converter utilizes input parallel output series configuration for providing a much higher voltage gain without adopting an extreme large duty cycle. The converter also reduces the voltage stress of both active switches and diodes and finally reduces both switching and conduction losses. The converter features automatic uniform current sharing without adding extra circuitry or complex control methods. Closed loop PI controller is used to control the error and achieves the desired output voltage for the converter section. The converter section is followed by a single phase full bridge inverter.

[1] Ching-Tsai Pan,Chen-Feng Chuang, and Chia-Chi Chu "A Novel Transformer-less Adaptable Voltage Quadrupler DC Converter
with Low Switch Voltage Stress" IEEE Transactions On Power Electronics, Vol. 29, No. 9, September 2014
[2] W. Li and X. He, "Review of non-isolated high step-up DC/DC converters in photovoltaic grid-connected applications," IEEE
Trans. Ind. Electron., vol. 58, no. 4, pp. 1239–1250, Apr. 2011.
[3] C. M. Wang, "A novel ZCS-PWM flyback converter with a simple ZCS PWM commutation cell," IEEE Trans. Ind. Electron.,
vol. 55, no. 2, pp. 749–757, Feb. 2008.
[4] J. M. Kwon and B. H. Kwon, "High step-up active-clamp converter with input-current doubler and output-voltage doubler for
fuel cell power systems," IEEE Trans. Power Electron., vol. 24, no. 1, pp. 108–115, Jan. 2009.
[5] R. J. Wai, W. H. Wang, and C. Y. Lin, "High-performance stand-alone photovoltaic generation system," IEEE Trans. Ind.
Electron., vol. 55, no. 1, pp. 240–250, Jan. 2008.

Abstract: This paper presents a dc-dc boost converter and dc-ac inverter combination. Dc-dc boost converter topology is based on the three state switching cell with high voltage gain. The converter section is analyzed considering the operation in continuous conduction mode and in the overlapping mode. The converter section supplies input to a single phase full bridge inverter with sinusoidal pulse width modulation control. The closed loop PI control for the converter section adds to its advantages. Both the advantages of the converter and inverter section are combined in the proposed topology. Several topologies where high voltage dc-dc conversion and dc- ac inversion are initially investigated. Comparison of the control system is done before selecting the control for the converter section. The simulated results are presented to validate the theoretical analysis.

Keywords - Boost converter, High voltage gain, PI control, Single phase full bridge inverter, Three state switching cell.

[1] O. Lopez-Santos, L. Martinez-Salamero, G. Garcia, H. Valderrama-Blavi and D. O. Mercuri, "Efficiency analysis of a sliding-mode
controlled quadratic boost converter", IET Power Electron., vol. 6, no. 2, pp. 364– 373, 2013.
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Abstract: This project proposes an improved transformer less high step-up dc-dc converter using Cockcroft Walton voltage multiplier. The low input DC voltage is boost up by a boost inductor in DC-DC converter and the proposed circuit performs the inverter operation. The n-stage CW-voltage multiplier is applying low input AC voltage to high output DC voltage. It provides continuous input current with low ripple, high voltage gain, reduced switching losses, low voltage stress on the switches, diodes and capacitors and also improving efficiency of the converter. The power switches having two independent frequencies.

[1] Chung-Ming Young, Ming-Hui Chen, "Cascade Cockcroft–Walton Voltage Multiplier Applied to Transformerless High Step-Up
DC–DC Converter" IEEE Trans. Power Electronics., vol29, no. 2, pp. 789–800, Feb. 2014.
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