Hello Max,you can used DC-DC converter with swiching freq from 38-40khz,then you can use your pic to generate your pwm signal.
Hi againCan u elaborate more the two methods, SPWM method and link inverter ? Why DC-DC converter will not include any feed back??? Then how can it be constant 400V DC with change of load ?
Hi again
Both are the same .
and about feed back , you'll not need it , for simple loads , but if your load is unknown , because of out put filter that is at butter worth family , if your load become higher than normalized impedance the out put wave of last stage will go to the higher amplitudes , and you should take a DC feed back from out put to your first stage .
Best Wishes
Goldsmith
After some study I hv decided to design a 1000 Watt pure sine wave inverter. I need advice from the Power Electronics Experts (LOL!) in this forum for the following issues.... Smiley
1) I have chosen to use 12V DC >>> PUSH-PULL>>> 400V DC >>> SWITCHING H-BRIDGE>>> 220V AC WITH HARMONICS >>> FILTERING >>> 220V AC PURE SINE WAVE ( pls advice if it is correct or not or any other better idea)
2) pls advice the switching frequency both in DC-DC and DC-AC stage.
3) What should I chose in both stage? IGBT or MOSFET ? I m finding hard-one to chose any of them
4) Should I use FULL BRIDGE topology in DC-DC stage instead of PUSH-PULL ?
5) I want to use gate driver IC for driving 4 MOSFET/IGBT in (400V DC >>> SWITCHING H-BRIDGE>>> 220V AC WITH HARMONICS ) ? pls suggest which IC should I use ..
6) Any other concept for designing pure sine wave inverter instead of (12V DC >>> PUSH-PULL>>> 400V DC >>> SWITCHING H-BRIDGE>>> 220V AC WITH HARMONICS>>> FILTERING >>> 220V AC PURE SINE WAVE)
w8ing for your ans guys ......
selecting mosfets , is instead of your frequency .please suggest some MOSFETs for both the stages DC-DC and DC-AC as u r very much experienced ... and how can I identify fake parts ???
Dear TahmidFor the DC-DC stage, you can parallel multiple IRF3205s. Each has a high current rating and low RDS(on), so paralleling will increase current capacity and decrease RDS(on) further.
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