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Hello, I am planning to make an H bridge for an inverter, and i have these IGBT drivers, can i use them to drive mosfets? My frequency is 15KhZ - 66uS period.
https://www.infineon.com/dgdl/Infineon-2EDL05x06xx-DS-v02_07-EN.pdf?fileId=db3a30433e30e4bf013e3c649ffd6c8b
In the data sheet it says...
Could i keep burning my mosfets because of a very low gate resistor? I use 4.7Ohms and i saw the same mosfet with 40Ohms and 10ohms. My mosfet is IRF3205
So i put everything back to a UPS with my transformer and i saw somethin weird. This ups is Modified sinewave and the pulses at the fets were like this. 5ms ON 15ms OFF with dead time of 5ms...isnt that a bit too much? It works like this but 1/4 of the period for dead time isnt a waste of energy...
So i found the schematic of the UPS i took the transformer from. I saw it has some resistors and capacitors coming from the drain. Do you think is some kind of snubber or its just for noise?
As you can see it was working like this, simple push pull topology and i keep burn my mosfets. The...
I dont quite understand this, could you explain to me why should i add more dead time? And shouldnt i feed the same signal to the mosfets? The must act like sink source right? So why not put signal 1 to A and D ?
Assuming i have and H bridge with N-Mosfets, If i give the compliment of signal 1 to C and the 2 to D with more dead time, how will the signals be in sync? Dont mosftets A and D have to be open the same time? If one delays what will happen?
Hey,
I have 2 signals with spwm and plenty of dead time between them. What i saw about H Bridge is I must feed the one signal to the A and D mosfets and the other to B and C mosfets. Will this work this way assuming i have 100+uS between the signals?
Why use split bobbin transformer? The...
(Crude paint graph warning)
No, i didn't short anything. I left everything open. I measured One time between 1 and 2 and the second time between 2 and 3. The black wire stayed connected i just changed the red one.
When i measured the total inductance 1 - 3 i measured around 50uH
I measured center tap to the other two. Common to ct and then i changed.
My meter is pretty basic, it automaticaly measures. It says F=506khz the voltage is 5V. I cant choose those settings.
So this is my waveform. This is what i feed in my mosfets(amplified to 12v with my mosfet driver). This is the almost max pwm (meaning more pulses and longer in the period) and as you can see there is more than enough time between the pulses for the mosfets to be on and off. Around 150uS. What...
Ok so i tried something, i made the new PCB and i noticed something. When i had one mosfet in like, half swtching, the transformer was working "fine", it didnt get burned or hot or anything. i tried both windings each every time. I even put a lighbulb and it lighted up. Later i put both...
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