You'll need at least 2 FETs, or you could use 4.
+bus 176
Fet1 Fet3
-------------------------------
---------------AC out
Fet2 Fet4
-bus 176
This is your standard H-bridge
The gates of Fet 3 and Fet2 can be tied together
and are pulsed complimentary with Fet1 and Fet4
You can use the SG1526 to do this.
Or you can replace Fet's 3 and 4 with capacitors
and pulse Fet 1 and 2 complimentary (make sure
you have some dead time in between turning one on
and the other off.
If you use IGBT's make sure you have anti-parallel diodes
on every device.
Rod
Rod Hower wrote:
> The problem is that you have to add a boost converter stage to step up
> the 120Vdc to 170Vdc before making 120Vac (ie, 120*1.414=169.7).
So with my 176 volt pack I just need to add a FET to turn it on/off at
60 Hz to make a crude square wave inverter? I'll have to dig up that
Home Power article...
_________
Jim Coate
1992 Chevy S-10
1970s Elec-Trak E20
http://www.eeevee.com
