The design was for kilowatts, but you were only testing 100 watt. Obviously, the energy stored in the full capacitance was capable of destroying the MOSFETS. When doing initial testing you should have been using much less storage capacitance after the line rectifier. You were warned.as I switch the power on the lightbulb in the ac mains barely glows for a little while might have been the split second then I hear a crak noise and the light bulb lights fully.
So you have no 7812 = +12V regulated floating supply, but instead use a 24 volt zenner clamp? Do you have a limiting resistor before the zenners ? Does that explain why the half-bridge driver may be unable to correctly drive the MOSFET gates?the device is not run from a 7812, its run from a small transformer , rectifier , and two 12 volt zeners in series., in other words from a regulated 24 volt supply.
That is the case.could it be that if the IR2110 gets supplied by 22 or at most say 23 volts DC it would also drive the mosfet with that voltage level?
What is this? The zenner or the 7812? Where does that average 500mA come from? Only current pulses are needed when MOSFETs are switching. Resistor with Zener must carry current maximum needed over the full cycle. It will waste energy whenever current is below peak of cycle, = very poor for power pulses.One question though, ok the zener regulator isnt that effective but since this is a linera regulator wouldn't it produce quite some heat considering it would have to drop bit more than 10 volts on an average of 500mA?
Buy on specification, not a guess of quality. The quality of your circuit construction is nowhere near as high as quality of Vishay products.Or maybe the Vishay products are less quality ?
When one mosfet is on the other has full voltage of -162V to +162V = 324V total.Also I see some good high current but lower voltage rated devices.Now heres a question , for example if I used a 50a 200v device for both mosfets in the half bridge , as long as the deadime is kept in check and no spikes occur , the devices should work because the voltage any of the device has to whitstand is only half the rectified mains so about 162 volts in my case.I do realize the device would have a higher chance of failing under some unwanted events like spikes from the primary or else but what do you think?
A zener regulator with a series resistor is less efficient than a 7815 since the series resistor with the zener is ALWAYS conducting. A 7815 will not operate in this manner. The 7815 only wastes power when there is current passing through it.One question though, ok the zener regulator isnt that effective but since this is a linera regulator wouldn't it produce quite some heat considering it would have to drop bit more than 10 volts on an average of 500mA?
or maybe it has some advanced little circuitry inside and that's not the case.
There are plenty of linear power supplies out there that are high current supplies. 50 amps is not uncommon.Because usually when I imagine a classical linear regulator I see a half conducting BJT which then is only suited to low current applications due to the excessive heating.
Why not look into a 317 adjustable regulator if your source does not have the 7812? Even a 7805 can be used as an adjustable regulator. Changing a design may be acceptable when you consider all of the consequences.by this i was reffering to the 7812.I think of buying the 7815 because 15 volts is in the acceptable voltage level for a mosfets gate and mainly because the 7812 is not in my store but the 7815 is.after all ive been driving my mosfets with 20 volts and they have stood except for the fairchilds which took a bit more than those 20 and lost the game, 15 vmax should be good.i will see if i can get the 12 volt version but if not ill go with the 15v one.
My photo of a picture in Tiroler Volkskunstmuseum, unknown 17thC European artist, there are several copies and later versions by different people.oh and by the way I see you are a bit eccentric yourself or atleast that's the impression one would get from you r avatar picture which I assume is painted by Salvador Dali, maybe some other not sure ,
Let me and the Museum know if you work out who the artist was. She was well ahead of her time.Will check out his works.
You can also wire it like an adjustable regulator. We know that the regulator will do what it needs to in order to get 5 volts between the ground pin and the output pin. So if we make a voltage divider between the output and ground and tie the ground PIN to the node between the resistors of our voltage divider the output voltage will be determined by the ratio of the resistors in the divider.7805? but the last two digits indicate it's a 5v regulator?