, why use flyback topology ?
many books have mentioned , The flyback topology practical power below 150W , detailed the cause , however ,power inverter, is rarely profiling , I try to do the instructions . Parse the switch , magnetic devices , capacitors from three aspects .
lower switch (MOSFET). Assuming the input voltage constant 60V, situation , ibid . Appropriate, flyback ,Grid tie inverter, forward , half-bridge selection mosfet withstand voltage with flow through maximum rms current of the mosfet from two aspects .
visible fantasy situation , three topological differences are not body had the lower mosfet conduction losses ( Watch out half-bridge applications two power mosfet ) , switch to another loss , switching loss , the derivation of the formula see EXEL documents . Assuming enlightened off a similar loss , inductance is infinite , then figuring the formula is as follows
flyback
The positive shock
half-bridge
can be seen from the formula , in only for the case of an input voltage point optimization , the flyback switching losses , with the half-bridge does not forward differences , which is the limit flyback high power applications a cause, http://www.gridtieinverter.de/
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