Assemble a mosfet module for hundreds of kiloamperes

[v48371]

I need to make a switching power supply with a conversion frequency of about 100 kHz with a supply voltage of about 12V and a current consumption of hundreds of thousands of Amps and this is no joke. I need to use MegaJoules of energy per pulse, and the most compact solution is batteries.
I don't want to waste time, this is expensive time of my life, during which I could earn money, clean the house or prepare firewood. “Do better, the worst comes naturally” is a principle of life and I created the topic not for jokes.
My budget is limited and I need to use inexpensive mosfets connected in parallel. I need a ready-made working diagram.
100kHz, 12V, 100kA

 

[ChrisP58]

What is the output voltage of the supply?
What are the actual power requirements of the load being powered?

 

[ronsimpson]

IXTN660N04T4 Here is a MOSFET. Don't get too excited about "600A". I have pulsed them to 600 but not used them for seconds at that current.
IRL40SC228 I have used these or something very similar.

We need much more information about the pulse you want. I have reached 2000A at 1000V.

 

[alec_t]

What supply do you have that can source 1.2 megawatts?

 

[danadak]

Early part of my career I operated a 5 MW Nuc Reactor, that had a 100% transient capability.

That should suffice


Regards, Dana.

 

[eTech]

I need to make a switching power supply with a conversion frequency of about 100 kHz with a supply voltage of about 12V and a current consumption of hundreds of thousands of Amps and this is no joke. I need to use MegaJoules of energy per pulse, and the most compact solution is batteries.
100kHz, 12V, 100kA

The supply would consume more power than it could output unless its 100% efficient (and it won't be).

 

[Papabravo]

The supply would consume more power than it could output unless its 100% efficient (and it won't be).

Only an unlimited budget would have a chance of getting close to 80-90% efficient.

 

[Beau Schwabe]

The 100kHz is gonna get you ... with as many mosfets as you will need, there will be gate capacitance that you will need to overcome as well as parasitic capacitance across the S-D transistor terminals.

So to put this in perspective, I deal with Bitcoin miners ... Each miner (240V ) draws about 16 amps or 3500 Watts ... So for a 1 Mega Watt system that would be roughly 300 Miners ... We get that kind of power from Natural gas generators on site at a well site. .... And you said you want cheap?.... None of that is cheap, the generator alone costs $200k and for a generator that's a deal.

 

[v48371]

In general, I need a correct connection diagram specifically for IRLR8726 mosfets. I am sure that if they are filled with a coolant, for example liquid isobutane (boiling at -11 degrees), they will give 1 kA. The cost of 100 pieces can be about $ 50. I can get a lot of amperes from a fuel cell.

 

[ZipZapOuch]

What supply do you have that can source 1.2 megawatts?

He said "batteries" in his first post.

...and the most compact solution is batteries.

then he said...

I can get a lot of amperes from a fuel cell.

I can't wait to hear what he says next.

 

[v48371]

Everything is correct. They don't help military developments on any forum. I also don’t want to communicate further.

 

[ZipZapOuch]

Look up COIL laser.

 

[Papabravo]

Everything is correct. They don't help military developments on any forum. I also don’t want to communicate further.

Who are they do you suppose? aaand the speculators run wild!

 

[schmitt trigger]

Early part of my career I operated a 5 MW Nuc Reactor, that had a 100% transient capability.

That should suffice


Regards, Dana.

Sounds like a naval reactor

 

[Nigel Goodwin]

Sounds like a naval reactor

Everyone seems to think we are in a very safe part of the country, as regards nuclear reactors - totally missing that nuclear reactors for submarines are manufactured by Rolls Royce at Derby, and there's been one running there for years.

 

[alec_t]

I am sure that if they are filled with a coolant, for example liquid isobutane (boiling at -11 degrees), they will give 1 kA.

How will you fill them? They're not hollow !
Per the datasheet the IRLR8726 has an Rds(on) of 5.8mOhm. So 1kA would drop 5.8V and the dissipation would be 5.8kW. That's a tad above the rated 38W at a case temperature of 100*C.

 

[ronsimpson]

I need a correct connection diagram specifically for IRLR8726 mosfets.

If you don't know how to connect a MOSFET you have bigger problems than the MOSFET.
There are many different ways to use a transistor. With out knowing what you are really doing we are only guessing what you want. I know you will never tell us.

 

[Beau Schwabe]

"Everything is correct. They don't help military developments on any forum. I also don’t want to communicate further." - ... And we should all be alarmed that military development is requesting information from the forum. ... just sayin

 

[ZipZapOuch]

He's from Ukraine. They are looking for any help/inspiration can get.

 

[MrAl]

I need to make a switching power supply with a conversion frequency of about 100 kHz with a supply voltage of about 12V and a current consumption of hundreds of thousands of Amps and this is no joke. I need to use MegaJoules of energy per pulse, and the most compact solution is batteries.
I don't want to waste time, this is expensive time of my life, during which I could earn money, clean the house or prepare firewood. “Do better, the worst comes naturally” is a principle of life and I created the topic not for jokes.
My budget is limited and I need to use inexpensive mosfets connected in parallel. I need a ready-made working diagram.
100kHz, 12V, 100kA

Hi,

"Ready-made working diagram". Wow, 100kA, 100kHz, you're asking for everything and then some.

This is a problem for an experience engineer with a lot of experience in power circuit design. I've actually done this very thing for a number of years and still absorbing new ideas and techniques yet I'm not sure even I would want to attempt something like this. The issues are 100kA and 100kHz. 100kA is a lot of drain-source current, and 100kHz is a top limit for many power converters. This means you will be at the edge of some of the technologies with this. What I am saying is you need to hire an engineering firm this is not a hobby project.

You can't imagine the problems that will crop up with something like this. I'm not even sure I want to list them. There are techniques and methods that are needed to be understood fully to get something like this to work, and some of those techniques and methods would only be known by personnel that have actually worked in the power control industry for some time. This would be considered insider information; things that you never hear about unless you work in that industry and thus have no idea about as of yet. That's why you need someone who has dealt with this in detail for a number of years and has demonstrated actual success over time.

So, this should not be a question about HOW to create a circuit, it's should really be about WHO to hire. It's not just a circuit we are talking about here either. It's about a physical construction. Special attention to physical layout would be a very important point.

So, start asking about who to hire not how to make a circuit. I don't usually bet on anything, but I seriously doubt you'll ever pull this off without some serious help from people who already know all the ins and outs of a complex design like this.

I'll list a few of the problems if you really want to think about it, but I doubt it will do any good because there's almost no way you will be able to deal with them all anyway by yourself.

If I am sounding very negative about this then I feel I have done my job for today in helping others with their electrical/electronic circuits and circuit theory