scholarly journals Modeling and Control of Solar PV System with Closed Loop ZVS Resonant SEPIC Converter

This paper pledges with replication and portrayal of a zero voltage switching of SEPIC for the purpose of photovoltaic application. A source of energy is given by photovoltaic panel. A impose capacitor and an supporting switch are coupled. A supporting inductors and combined inductors are second-hand to accomplish ripple less current of input then Zero voltage switching method of the supporting switches with head switch. The dynamic fix strategy and the technique of voltage multiplier are practical to the conventionalist converter of SEPIC to support the addition of voltage, compact down the worries of voltage of the diode and matchless quality switches. Moreover, with utilizing essentialness among the inductor's blasting and voltage multiplier circuit's capacitor, Diode's of output ZCS strategy is accomplished and its inverse recuperation trouncing be broadly consolidated. charge to the power semiconductor gadget's delicate exchanging correspondence and improved the proposed system. The realistic speculative assessment has been affirmed through an example of 80W and 100KHz converter. What's more, determined ability of anticipated converter has been accomplished an expense of 94.8% at the most elevated yield control.

Mathematical analysis and stability prediction of soft switched isolated dc-dc converter is presented in this paper. Half bridge dc-dc converter is an attractive topology for low voltage applications due to its simplicity, lower cost, improved reliability and enhanced dynamic performance. Both power semiconductor switches of the proposed isolated converter operate asymmetrically under Zero Voltage Switching (ZVS) to achieve high efficiency and low voltage stress. Furthermore, the ringing resulted from the oscillation between the transformer leakage inductance and the junction capacitance of two switches is eliminated. Conversion efficiency is also improved by providing synchronous rectifier with very small output filter. The operating principle, state space analysis and control strategy of proposed converter is explained with small signal model. Experimental results are presented to explain the zero voltage switching capability and stability features of proposed converter.


Author(s):  
Pavel Purgat ◽  
Soumya Bandyopadhyay ◽  
Zian Qin ◽  
Pavol GAE Bauer

2014 ◽  
Vol 573 ◽  
pp. 143-149
Author(s):  
N. Ismayil Kani ◽  
B.V. Manikandan ◽  
Prabakar Perciyal

—This The Pulse Width Modulation (PWM) DC-to-AC inverter has been widely used in many applications due to its circuit simplicity and rugged control scheme. It is however driven by a hard-switching pulse width modulation (PWM) inverter, which has low switching frequency, high switching loss, high electro-magnetic interference (EMI), high acoustic noise and low efficiency, etc. To solve these problems of the hard-switching inverter, many soft-switching inverters have been designed in the past. Unfortunately, high device voltage stress, large dc link voltage ripples, complex control scheme and so on are noticed in the existing soft-switching inverters. This proposed work overcomes the above problems with simple circuit topology and all switches work in zero-voltage switching condition. Comparative analysis between conventional open loop, PI and fuzzy logic based soft switching inverter is also presented and discussed. Keywords—Zero voltage switching, Inverter, Dc link, PI controller, Fuzzy logic system control ,Modulation strategy, Soft switching


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