Extreme Brutal and Simply Bench Power Supply Project /Statron/

[001]

Hi!
Very detalised project here https://www-user.tu-chemnitz.de/~heha/basteln/Konsumg%C3%BCter/Statron/

Any opinions?

[Wolfgang]

This is how I made my first power supplies some decades ago. Stability was everything, ensured by a "fat" output capacitor creating a dominant loop pole so low that any other time constants had no choice to make it unstable.

A side effect was a sort of "electronic Widlarization", especially for the higher voltage versions. If a test circuit misbehaved and decided to go low-ohmic for whatever reason, the output cap would just dump a few or even a few ten Joules into it, causing the culprit to enter the eternal electronic hunting grounds immediately. Smaller circuit would even evaporate leaving a clueless operator behind. Happened once with a 400V supply.

[001]

This is how I made my first power supplies some decades ago. Stability was everything, ensured by a "fat" output capacitor creating a dominant loop pole so low that any other time constants had no choice to make it unstable.

A side effect was a sort of "electronic Widlarization", especially for the higher voltage versions. If a test circuit misbehaved and decided to go low-ohmic for whatever reason, the output cap would just dump a few or even a few ten Joules into it, causing the culprit to enter the eternal electronic hunting grounds immediately. Smaller circuit would even evaporate leaving a clueless operator behind. Happened once with a 400V supply.

Great answer!
But sorry for my english. What   "electronic hunting" means? 
You say "cap would just dump a few or even a few ten Joules into it"
No way to limit current isnt`it?

[MK14]

Great answer!
But sorry for my english. What   "electronic hunting" means? 

They (seem to) mean that the component is killed/destroyed, damaged beyond further use.
Analogous to hunting/killing animals in a hunting ground.

By the excessive current/energy.

[mfro]

Great answer!
But sorry for my english. What   "electronic hunting" means? 

They (seem to) mean that the component is killed/destroyed, damaged beyond further use.
Analogous to hunting/killing animals in a hunting ground.

By the excessive current/energy.

A German phrase that probably does not translate well if you did not read Karl May's Winnetou as a child. When native Indians died there, they went to the "happy hunting grounds".

[2N3055]

Great answer!
But sorry for my english. What   "electronic hunting" means? 

They (seem to) mean that the component is killed/destroyed, damaged beyond further use.
Analogous to hunting/killing animals in a hunting ground.

By the excessive current/energy.

A German phrase that probably does not translate well if you did not read Karl May's Winnetou as a child. When native Indians died there, they went to the "happy hunting grounds".

LOL Winnetou.... Man, that was long time ago....!!

[Wolfgang]

This is how I made my first power supplies some decades ago. Stability was everything, ensured by a "fat" output capacitor creating a dominant loop pole so low that any other time constants had no choice to make it unstable.

A side effect was a sort of "electronic Widlarization", especially for the higher voltage versions. If a test circuit misbehaved and decided to go low-ohmic for whatever reason, the output cap would just dump a few or even a few ten Joules into it, causing the culprit to enter the eternal electronic hunting grounds immediately. Smaller circuit would even evaporate leaving a clueless operator behind. Happened once with a 400V supply.

Hi,

your English is probably OK, mine is not. As explained in later posts, the "eternal hunting grounds" were a term for a place where the indians that passed away were going to. I used an analogy for electronic components.

Now about the output cap. The purpose of this is to supply a dead short for all AC voltages, hence it does *not* have a resistor in series to limit current. The side effect is that in case a load circuit causes a short, all the caps charge is dumped into this circuit.
For the energy contained in a cap you have the well known formula of C*U^2/2. So, 100uF at 400V gives 8 Joules, a bit too much for a lot of circuits.


Great answer!
But sorry for my english. What   "electronic hunting" means? 
You say "cap would just dump a few or even a few ten Joules into it"
No way to limit current isnt`it?