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Author Topic: Need help for Pure Sine Wave Inverter  (Read 5299 times)
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MAXPAYNE
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It's a little funny......


« on: March 23, 2012, 08:23:38 08:23 »

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 Sad

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)

w8 for your ans guys ...... Smiley
« Last Edit: March 23, 2012, 08:25:58 08:25 by MAXPAYNE » Logged

Whats the Craziest Project u have done lately...?
enzine
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« Reply #1 on: March 24, 2012, 12:23:56 00:23 »

Here are some tips

1) If possible increases the input voltage from 12V to 24V or 48V.
   The higher is the battery voltage, less current need to switch in stage push-pull DC 400V.
   If possible, use a PWM sinusoidal modulation in the H-bridge to increase the total efficiency (= longer battery life) and
   thus reduce the output  filter.

2) 20..50kHz  is a good choice to limit the switching losses and for a wide choice of MOSFETs, DIODEs and ferrites for transformers / inductors.

3) The driving of the MOSFET is simpler. I use IGBTs for power - voltages even higher than 3kW -1000V

4) For simplicity, I prefer the push-pull stage for DC-DC

5) There are several IC drivers to drive the arms of the bridge-H, for example, IR2110 / IR2113.
    Alternatively you can use a transformer to drive to the gates of the high side.

6) The configuration you described is "canonical" on which much literature is available.

 Finally as a last resource for learning: REVERSE ENGINEERING !!!" Grin Grin Grin Grin Grin

Good luck !

Ciao

P.S.

More tips on Topic: Sinewave Inverter With Pic:

http://www.sonsivri.to/forum/index.php?topic=362.0
« Last Edit: April 01, 2012, 07:50:04 19:50 by enzine » Logged
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