12V DC To 220 V AC Inverter - Electronic Circuits Projects Diagrams Free

shams-_-m · 22nd March 2008, 05:44 PM

I just Made Up The Inverter Circuit That Shown Belw

Its Work Very Gd

But When I Connect Any Load There A Drop Voltage ,

So I Increase The Frequency The Drop Decrease

The Equestion ; The AC Load Like TV, PC ....

Have Any Side Effect From This Frequency ...

And Isn 't There Any Way Else To Keep The Voltage Constant

Thanx ......

Shams .........

audioguru · 22nd March 2008, 06:09 PM

The output of your inverter has a square-wave. Many electronic products won't work because their power supply works from the higher peak voltage of a sine-wave.

The circuit is too simple to regulate its output voltage.

A cheap poor quality transformer has poor voltage regulation.
Maybe your transformer is designed for 60Hz so has a small core. Then it won't work well with 50Hz.

HS3 · 7th April 2008, 02:45 AM

Today it just does not make sense to use a low frequency transformer. It makes much more sense to convert to high voltage at high frequency and then use a full or half bridge to obtain a "modified sine wave". That is what all commercial units do.

petrv · 7th April 2008, 08:50 AM

You can have a look at this AppNote from Intersil:

http://www.intersil.com/data/an/an9611.pdf

An Inverter with HIP4082 and MOSFETs

Petr

22nd March 2008, 06:09 PM	(permalink)
audioguru Experienced Member	The output of your inverter has a square-wave. Many electronic products won't work because their power supply works from the higher peak voltage of a sine-wave. The circuit is too simple to regulate its output voltage. A cheap poor quality transformer has poor voltage regulation. Maybe your transformer is designed for 60Hz so has a small core. Then it won't work well with 50Hz. __________________ Uncle $crooge

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7th April 2008, 02:45 AM	(permalink)
HS3 Experienced Member	Today it just does not make sense to use a low frequency transformer. It makes much more sense to convert to high voltage at high frequency and then use a full or half bridge to obtain a "modified sine wave". That is what all commercial units do.

7th April 2008, 08:50 AM	(permalink)
petrv Experienced Member	You can have a look at this AppNote from Intersil: http://www.intersil.com/data/an/an9611.pdf An Inverter with HIP4082 and MOSFETs Petr