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OverUnity Research > Electrical / Electronic Theory and Learning Center > Learning Center Miscellaneous > 4500 VDC MOSFETS ?
2024-11-27, 18:50:29
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Author Topic: 4500 VDC MOSFETS ?  (Read 1538 times)
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img  Grumpy
4500 VDC MOSFETS ? « on: 2022-07-07, 00:21:10 »

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https://www.mouser.com/new/ixys/ixys-4500vmosfet-mosfet/

 IXYS 4500V High Voltage Power MOSFETs

pretty expensive, but interesting...
   
img  F6FLT
Re: 4500 VDC MOSFETS ? « Reply #1 on: 2022-07-07, 07:53:24 »
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Impressive!   O0
I love the electronics industry. It makes components that I wouldn't have even dreamed of 10 years ago.


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"Open your mind, but not like a trash bin"
   
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Re: 4500 VDC MOSFETS ? « Reply #2 on: 2022-07-07, 19:13:05 »

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Triggering a MOSFET with a @N3904 transistor in avalanche mode (see attached file).

Building a pulse generator for 4kv appears to be possible.

Edit: attached file
« Last Edit: 2022-07-08, 17:56:38 by Grumpy »
   
img  gyula
Re: 4500 VDC MOSFETS ? « Reply #3 on: 2022-07-07, 23:58:55 »
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I came across this manufacturer some years ago on the web, they manufacture really high voltage rated solid state switches like thyristors, MOSFETs, IGBTs, also now in Silicon Carbide tech. 
   
https://www.behlke.com/    https://www.behlke.com/productlines.htm   The prices are surely high and sent by request.  The ON resistances are much lower.

There is this paper from 1991 on a fast 8 kV switch using stacked MOSFETs and components of that era, maybe the principle can be used to build such HV solid state switches still less expensively for 4-5 kV than a dedicated single 4-5 kV device itself costs.
 http://bromine.cchem.berkeley.edu/grppub/frbm2.pdf 

Gyula
   
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Re: 4500 VDC MOSFETS ? « Reply #4 on: 2022-07-08, 00:01:38 »
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Quote from: Grumpy on 2022-07-07, 19:13:05
Triggering a MOSFET with a @N3904 transistor in avalanche mode (see attached file).

Building a pulse generator for 4kv appears to be possible.

No file attached?
   
img  AlienGrey
Re: 4500 VDC MOSFETS ? « Reply #5 on: 2022-07-08, 08:38:16 »
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Do you mean this post I posted on Dally thread ?
Its on page 1476 !

Sil
   
img  AlienGrey
Re: 4500 VDC MOSFETS ? « Reply #6 on: 2022-07-08, 08:47:50 »
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Also you dont have to use the PW chip device you can do it with a NE555
The problem with Mos Fets is it's capacitance and to get 1000 volt devices
you have to totem-pole them one way or another  C.C and if one goes pop they all go pop  :'(

Another way is to use ultra fast VHF transistors again Enjoykin 2 published a circuit on the Dally thread
over on Over Unity. I'm sure you can find it I did have it on a slide but some troll has  found a way of converting
JPG files to crud via a vbs file that's now doing the rounds so be aware!
   
img  Grumpy
Re: 4500 VDC MOSFETS ? « Reply #7 on: 2022-07-08, 17:57:40 »

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I edited my post to attached the article by Baker.

Sorry, I've never looked at the Dally thread to see what it is about...
   
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Re: 4500 VDC MOSFETS ? « Reply #8 on: 2022-07-11, 20:56:40 »

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I ordered a couple of these 4500v MOSFETs to try building and pulse generator using a 2N3904 or FMMT411 as an avalanche transistor trigger.

Should make for some serious fun!
   
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