Paper Details

LLC resonant frequency converter is basically a combo of series as well as parallel resonant ckt. For LCC resonantconverter it is associated with a disadvantage that, though it has two resonant frequencies, the lower resonant frequency is inZCS region[5]. For this application, we are not able to design the converter working at this resonant frequency. LLCresonant converter existed for a very long time but because of unknown characteristic of this converter it was used as a seriesresonant converter with basically a passive (resistive) load. . Here, it was designed to operate in switching frequency higherthan resonant frequency of the series resonant tank of Lr and Cr converter acts very similar to Series Resonant Converter.The benefit of LLC resonant converter is narrow switching frequency range with light load[6] . Basically, the control cktplays a very imp. role and hence 555 Timer used here provides a perfect square wave as the control ckt provides no slewrate which makes the square wave really strong and impenetrable. The dead band circuit provides the exclusive dead bandin micro seconds so as to avoid the simultaneous firing of two pairs of IGBT’s where one pair switches off and the other onfor a slightest period of time. Hence, the isolator ckt here is associated with each and every ckt used because it acts as adriver and an isolation to each of the IGBT is provided with one exclusive transformer supply[3]. The IGBT’s are fired usingthe appropriate signal using the previous boards and hence at last a high frequency rectifier ckt with a filtering capacitor isused to get an exact dc waveform .The basic goal of this particular analysis is to observe the wave forms and characteristicsof converters with differently positioned passive elements in the form of tank circuits. The supported simulation is donethrough PSIM 6.0 software tool.

Aakar Mehul Sheth, Prof. Hiren Patel, Prof. Ruchit Soni, “SIMULATED ANALYSIS OF RESONANT FREQUENCY CONVERTER USING DIFFERENT TANK CIRCUITS”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 2, Issue 8, pp. 79-85, August 2015.