On Aug 28, 4:02*pm, wrote:
On Aug 27, 12:40*pm, raypsi wrote:





finally came across an article by VK3HZ that describes how to make a
microwave oven inverter PS work, as a stand alone supply.
the link is:www.users.bigpond.net.au/dwsmith/hv_inverter.pdf

It's only regulated from the primary side. And you can make it put out
anything from 2000 to 4000 VDC. but at 1300 watts.

So all I have to do is load down the primary to fake out the regulator
into seeing 1300 watts, Or run class A.

The output or the input still has to be filtered

There's an opto coupler that has to see a 110hz square wave, according
to VK3HZ, that'll keep the supply running full tilt as long as there
is power supplied to the inverter.

73
n8zu

If the circuit can be driven from 555 osc perhaps the pulse width can
be controlled from a feedback voltage taken off the output of the
power supply.
I am thinking adding a small winding to the transformer rectifying and
filtering it and supplying this back to control the pulse width of
your osc.

JImmie- Hide quoted text -

- Show quoted text -

I was the OP of the origonal thread about the inverter power supplies.
I was actually more interested in learning about the design of the
power supplies so I could possibly build one from scratch. With the
right information this may be easier to do than to modify one from a
microwave oven. I am very grateful for the information. I have a
couple of the Panasonic power supplies unfortunately they dont work
but maybe I can repair them now that I have a schematic. Information
on the transformer would be a good thing to have as I am sure it could
be optimized for the desired output voltage and current needed for an
amateur amplifier.

With the current transformer on the front end I am guessing this may
be the feedback path for regulation. That is to say the power supply
is being controlled by the amount of current that is being drawn on
the input side of the power supply. If this is the case maybe this
input can be taken of the out put of the power supply and then the
supply could be voltage regulated instead of being power regulated.


Jimmie