2020. 3. 22. 19:56ㆍ카테고리 없음
Image shack hosted images require clicking on them a few times before you can view them full size; even then this one is still hard to read. Baggio2, I see you're using N-channel MOSFETs on both the high and low side of your H-bridge. While this is fairly common nowadays, the method you're using won't work.
U3A appears to be an opamp, though I can't make out what specific model. Usually, opamps are not sufficient to drive a power MOSFET's gate at more than a couple of kHz.
But let's look at what happens to Q1's drive. If Q1's source were connected to the negative rail, then the output of U3A would be able to vary Q1's gate voltage from somewhere above the negative rail to somewhere below the positive rail. An IRF540 MOSFET has a maximum Vgs of +20v/-20v.
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If your + and - rails were more than 20v apart, you would likely exceed the maximum Vgs of +20v and destroy the MOSFET. Let's look at Q2's drive. Basically, you want Q2 off if Q1 is conducting, and vice versa. However, you've connected both gates together, so they'll try to be ON together, and OFF together. If they were both conducting simultaneously, you would effectively create a direct short between your positive and negative rails.
What's not quite so obvious is that Q2 is fully OFF when Vgs=0v, and fully ON when Vgs=10v. You must always reference the gate voltage to the source terminal of the MOSFET. As things are now, you would never be able to raise Q2's gate above the positive rail, which will be a necessity in order to get Q2's source terminal near the positive rail. I'm wondering why you didn't ask your instructor for more help before now, or why you didn't start asking for help earlier. Asking for help at 21:00 on the night before it's due is a bit irresponsible, don't you think? If I DID complete it for you, then the only thing you would learn is that it's OK to be irresponsible, and that you can con someone to do your work for you at the very last minute.
However, if you take that big fat 'F' for failure, you will learn that being irresponsible is not acceptable, and that if you find yourself 'over your head' in a project, you should more diligently seek out resources to gain the understanding you need to complete the project. Failing will often teach you more than succeeding. It's what you learn that counts.