COP 20.00 (2000%) Times, Reactive Power Energy Source Generator,

[listener191]

Hi Mario,

This is a photo showing current waveform with light bulb load, about the same 31W.

Not sure whats happening with the negative charge waveform?

Barry

[listener191]

All, appologies for that last photo, forgot to reduce it.

Hi Mario,

The negative charge  waveform distortion was another failed MOSFET..shorted!

Don't know what the problem is now, these are 650V 10A devices.

Barry

[magpwr]

All, appologies for that last photo, forgot to reduce it.

Hi Mario,

The negative charge  waveform distortion was another failed MOSFET..shorted!

Don't know what the problem is now, these are 650V 10A devices.

Barry

hi listener191,

To fix/modify thread -The photo just needs to be re uploaded with the smaller size eg:pbrush to shrink photo to 30% on both axis.Do uncheck old photo with similar name.

[popolibero]

Hi Barry,


thanks for the pics, man that photo is so big I can't even fit the scope shot on my screen to look at it ha ha .
I see you are using some big caps, that means quite some current pulses, check the SOA curve of your mosfet on the data sheet. Maybe the current is too high for too long for them to handle it.
I don't think we will see reduced consumption on the amplifier, even if the circuit works correctly and gives back almost all it takes, because the amp is a source which doesn't work like a generator (or line which is the same). But once you feel comfortable and your circuit works well maybe you can give it a shot on the line and see what you power meter says about the input with regards to what the load is consuming.
I've ordered the components to build your control circuit.


regards,
Mario

[Farmhand]

Hi Mario,

The current probe (clamp on)  is between the load and the switches.

The load is 208 ohm and has an inductance of 249mH

I found the problem that was destroying the MOSFET's. I am using 60uF non polarized caps and I have two more sets of these
but I decided to place 660uF electrolytics  in place to make a large increase in capacitance. The problem occured as the range of
my timing adjustment allows the charge period to be moved into the opposite phase and the electrolytics were shorting when
this happened. I have reverted to non polarized.

Barry

Hi Barry, How come you are using an inductive load ? The load should be resistive so as to dissipate energy and consume real
power for the output. I suggest a large non inductive resistor then you can get load power measurements as well with no
need for power factor calculations.

A non inductive load might help preserve the switches as well. It could be the current surge trying to charge a totally discharged
relatively large capacitor with no current restriction or it could be the inductive load wreaking havoc on solid state switches.

The initial current into a totally discharged 470 uF capacitor from a 120 or 240 volt supply would be significant. like a momentary short.

Just be careful not to measure the power charging the capacitors as output as well as the power when they discharge, the power
consumed by the resistive load only is the output. And to get an accurate input just use a sine wave inverter for the input then
you can measure the DC out of the battery.. Although It would not surprise me if the inverter was destroyed anyway.

Go well.