problem in stabilizer design

hi
we've designed a stabilizer for industrial purposes. the design details are these:
the output voltage is 220V 50Hz. a microcontroller generates a sine wave. the sine wave applied to an op-amp amplifier and then a push pull amplifier. there is a feedback from the output of push pull to the input of the op-amp.
the output of the push pull is connected to a transformer. the output appears on the output of transformer.
everything works well. the sine wave generates and can also supply loads. but the problem is with loads which have capacitance effect. this causes the output to phase shift of output voltage.
I don't know how to fix it. probably I have to change my feedback way or change the signal generation by a pll.
please give me a solution
thanks

Hi,

the phase shift should be small. I assume <10 degree.
What is the problem? As long as you don´t use it for syncing purpose.
Voltage may also change. The maximum i expect when inductance of transformer and load capacitance generate a resonancee.

What power is it?

Klaus

I used this to create a 3phase stabilizer. the problem occurs when a capacitance load connected to a phase
now the phase between them is not 120 degrees.

Hi,

not 120 degrees.

Click to expand...

This is no good information, because 119,99 is not 120, too.


Klaus

KlausST said:

Hi,


This is no good information, because 119,99 is not 120, too.


Klaus

Click to expand...

some times we measured 100 to 110 degrees.