Will the bleed resistors enable a shorter path to ground or not?

[Baluncore]

You have sufficient info to last a couple of days. You must slow down and learn to think. If you need data, there is more on the other side of Google. Youtube is your enemy.

I have work to do, you are asking too many questions.

 

[checkmatescott]

wont that half bridge work on its own because the the connections that go to the load oscillate making for the transformer primary winding excite and the all i have to do is put is put in square wave 50hz with the arduino

 

[Baluncore]

wont that half bridge work on its own because the the connections that go to the load oscillate making for the transformer primary winding excite and the all i have to do is put is put in square wave 50hz with the arduino

The lack of punctuation makes it hard to guess what you are suggesting.

If the primary of the transformer has a series capacitor, then you can use a half-bridge driven resonant converter topology. But that has a different transformer coupling and load circuit. Power can be increased again by using a full H-bridge with a resonant link.

I don't think you need power though, as the efficiency of a drone motor, friction-driving a generator, that runs an inverter, all to run an oven fan, will get quite warm. Losses in that chain will be greater than 50%, and you don't want it to melt the rubber.

 

[checkmatescott]

Is there a way to upload a video? I'm working on my machine today. I understand you have imagination but its a different thing when you see it running there is no chance of the rubber melting, it's a flywheel. I will be looking through the Application Note AN-978 and the data sheet in more detail today. Bassically, all I want to achieve at the moment, is this part of my project. My machine creates a constant DC output, i want to convert this DC voltage to AC at 50hz. Dont worry to much about efficiency I understand that it seems pointless, but its what I want to do. The DC will be around 55volts and I want 55volts AC to then go into a transformer with a turn ratio of 1:4.182 so that on the output side of the transformer will be 230v AC out. Is it possible for you to help me out with a method of doing this. Any comment welcomed, cheers
Scott

 

[Baluncore]

I do not watch videos, it is a waste of time and of bandwidth.

 

[checkmatescott]

okay, so going back to yesterdays conversation i think the best option may be to use an arduino with 4 digital outputs to control some IR2103 chips (half-bridge's) with N-Channel MOSFETs in a manner that can be manipulated into giving me an alternating current where the 55v will be switched at 50hz thus arriving at the AC desired.

 

[checkmatescott]

i would use a inverter from the web but they all seem to invert 12v and i need to invert 55v

 

[Baluncore]

okay, so going back to yesterdays conversation i think the best option may be to use an arduino with 4 digital outputs to control some IR2103 chips (half-bridge's) with N-Channel MOSFETs in a manner that can be manipulated into giving me an alternating current where the 55v will be switched at 50hz thus arriving at the AC desired.

That was not a question, it was a statement of intent.
I do not disagree.

You do not need permission to stop procrastinating.
Just go ahead and do it.

 

[checkmatescott]

thanks for the confirmation

 

[checkmatescott]

So I guess what i meant in my statment of intent was that I wanted a responce of something along the lines of "thats correct, this is how to wire it up....." can you give me a responce with something along those lines please? i just want to make sure I'm doing it right is there any software that you can recommend so that I might be able to simulate what I'm trying to do?

 

[DaveE]

is there any software that you can recommend so that I might be able to simulate what I'm trying to do?

LTSpice

 

[checkmatescott]

ok I have spice, does it have IC's integrated in/with the software?

 

[checkmatescott]

to be honest I kind of need spoon feeding a little bit to get me through this next part of my project

why skeptical?

 

[checkmatescott]

the mechanical flywheel in my case is equivalent to a low-pass-filter in electrical terms dunno if you've ever come accross maybe you might find the different analogys of some interest https://lpsa.swarthmore.edu/Analogs/ElectricalMechanicalAnalogs.html

 

[checkmatescott]

anyway that software is EPIC, I can't thank you enough

 

[DaveE]

ok I have spice, does it have IC's integrated in/with the software?

Read the online instructions. Less typing, more study. In our service/support department the favorite acronym was RTFM; which BTW, you would never say to a customer.

But, yes some. IC manufacturers will often give you spice models. But that only works for people that can search the web and find answers themselves.

 

[DaveE]

https://www.analog.com/en/search.html?q=lt1160

 

[TonyStewart]

Do not trust a simple schematic unless you know the credentials of who did it. When there are specs like max 60V ask why and get component specs and examine the interface. Trustworthy designs come from TI, Analog Deices, Microchip, Hitachi, Toshiba, etc. This is just a rookie undergraduate example. Using DO NOT EXCEED (DNE) levels is not a good design practice. Use the values in the tables where it is guaranteed. U1 is DNE 22V This also would exceed Vgs(max).

If this is your 1st attempt , it is impossible to design anything and have it work without failure and it will cost much more than buying one. But you may learn tools in the process. I recommend fast learners buy one then analyze it for load impedance ratio error and noise. Then learn how that works. It's simple resistor divider Ohms Law. The voltage drop load regulation error is the same % ratio of impedances for small values. Obviously 50% drop they are equal 1:1

 

[checkmatescott]

Ok I think I understand that, so which should I choose ir2103 or lt1160 in your opinion? are there any books that you recommend for learning?

 

[checkmatescott]

so the vgs of the P-channel mosfets cannot go above -20v and and the chips are rated for 18v so must not exceed that.

 

[checkmatescott]

I need to choose the N-channel mosfets, how do I do this correctly?

 

[checkmatescott]

so these are the N chan fets that i have settled on

IRFP4668​

I am still unclear how to make "The two halves a whole" or how to wire it up. As far as I can work out, the N chan fets are used as high side switches. The drain is connected to the supply voltage in my case it will be 55v and source to load. The gate needs the correct vgs to turn it on then I was looking at direct drive, level shifted drive, or bootstrap gate drive. In the picture you provided its a bootstrap driver and I suppose the logic in pins are important can I please have some guidance. Thanks again!

 

[checkmatescott]

can you teach me how to use google effciently for example when you search that initial image and cross checked with the internet?

 

[checkmatescott]

what is personal speculation

 

[checkmatescott]

can you draw me a diagram of where and how to place components to at least give me a clue, in the form of a very rough schematic plase

 

[checkmatescott]

so I've RTFM and i would like a walkthrough of how it works an explaination or description, push in the right direction, without degree level knowledge. Treat me as a layman can anyone shed some light!

 

[DaveE]

can you teach me how to use google effciently for example when you search that initial image and cross checked with the internet?

Probably not.

 

[checkmatescott]

ok what, is it like this?

 

[checkmatescott]

logging off for the night, my eyes are gone cyas

 

[berkeman]

Thread is on "pause" for a bit...

 

[berkeman]

Thread is on "pause" for a bit...

Whelp, it turns out that this newbie is an accomplished hacker of a number of things, and proud of it. He is now gone, and this thread will remain closed. Sorry that you spent so much time trying to help this "Help Vampire", but his intentions were not good. Thanks folks.