PV educator

Flyback inverter is a device that converters the DC into AC with the use of flyback transformer. For this inverter topology no dc-dc converter is required as the dc voltage is not related to the operation.  It is simple, has less component count hence reduced cost and has advantage of isolation through transformer[4]. Let's see how it works.

Recently i was reading  a paper entitled "Weighted efficiency oriented design methodology of flyback inverter for AC photo-voltaic modules". The word weighted efficiency was new for me so i searched about it. Here is what i found about it

The question is what scheme of conduction to be used for PV grid tied flyback inverter. Either the Discontinous Conduction Mode (DCM) or the Boundary Conduction Mode (BCM). So here is the literature review for this question.

Difference between BCM and DCM

The difference between DCM and BCM is shown in the figure above. Now that it is clear that DCM has dead bands in it while BCM operates at the boundary of CCM lets have evaluation of these conduction modes.

Ok, so the problem is that PSim trail version does not allow you to have more than 1 input and 1 output while yuou perform a co simulation with simulink. The problem is enhaced further by the fact that only 6000 data points can be stored with the trial version. Here is the solution

OptiMOS MOSFET is Infineon's latest generation N-channel power MOSFETs in 200V and 250V that is optimized specially for dc-dc conversion. It is trademark registered by Infineon N-Channel Power MOSFETs that are class leading power MOSFETs for highest power density and energy efficient solutions. Ultra low gate and output charges together with lowest on state resistance in small footprint packages. They have superior reverse recovery behaviour due to body diode with low Q_RR