Author Topic: A quick question about the Rigol DP832 power supply.  (Read 2507 times)

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Offline Spork Schivago

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A quick question about the Rigol DP832 power supply.
« on: May 06, 2015, 02:37:43 PM »
Hello,

I just ordered a Rigol DP832 power supply the other day.  It should be here tomorrow.  I was reading through the manual to try and get an idea of how to use it and I came across a warning I don't really understand.   I've just started learning how to design my own circuits and haven't gotten very far.   I fix computers for a living though and I'm sure I can find a use for this power supply in my repair work along with the circuits I'm building to learn how they all work.  Anyways, here's the part in the manual that I don't really follow:

Do Not Provide Power for the Active Load.
In order to avoid the anti-irrigation current which leads to the power control loop out
of control and damages the powered device, this power supply can only provide
power for the pure load without the current output function.

Could someone please explain to me what this means?  Thanks!
 

Offline Skimask

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Re: A quick question about the Rigol DP832 power supply.
« Reply #1 on: May 06, 2015, 03:17:08 PM »
What page is that on?  I can't find it in my manual...
I didn't take it apart.
I turned it on.

The only stupid question is, well, most of them...

Save a fuse...Blow an electrician.
 

Offline rob77

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Re: A quick question about the Rigol DP832 power supply.
« Reply #2 on: May 06, 2015, 03:22:35 PM »
it means you MUST NOT pump power into the supply - the supply can only provide current, can't sink current. e.g. you must not connect a load which is powered from other source as well.
 

Offline rf-loop

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Re: A quick question about the Rigol DP832 power supply.
« Reply #3 on: May 06, 2015, 06:32:11 PM »
it means you MUST NOT pump power into the supply - the supply can only provide current, can't sink current. e.g. you must not connect a load which is powered from other source as well.

Battery is also current source.
If practice and theory is not equal it tells that used application of theory  is wrong or the theory itself is wrong.
It is much easier to think an apple fall to the ground than to think that the earth and the apple will begin to move toward each other and collide.
 

Offline rob77

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Re: A quick question about the Rigol DP832 power supply.
« Reply #4 on: May 06, 2015, 07:31:42 PM »
it means you MUST NOT pump power into the supply - the supply can only provide current, can't sink current. e.g. you must not connect a load which is powered from other source as well.

Battery is also current source.

ONLY if the voltage of the battery is higher than the rigol's output ;)
 

Offline rf-loop

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Re: A quick question about the Rigol DP832 power supply.
« Reply #5 on: May 06, 2015, 11:50:14 PM »
it means you MUST NOT pump power into the supply - the supply can only provide current, can't sink current. e.g. you must not connect a load which is powered from other source as well.

Battery is also current source.

ONLY if the voltage of the battery is higher than the rigol's output ;)

I believe it is true with all power sources in this context.
« Last Edit: May 06, 2015, 11:53:04 PM by rf-loop »
If practice and theory is not equal it tells that used application of theory  is wrong or the theory itself is wrong.
It is much easier to think an apple fall to the ground than to think that the earth and the apple will begin to move toward each other and collide.
 

Offline Spork Schivago

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Re: A quick question about the Rigol DP832 power supply.
« Reply #6 on: May 07, 2015, 02:51:11 AM »
What page is that on?  I can't find it in my manual...

Page III, at the very end.
 

Offline Spork Schivago

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Re: A quick question about the Rigol DP832 power supply.
« Reply #7 on: May 07, 2015, 02:53:05 AM »
Thank you guys!   I really appreciate the explanation.  I might of tried it one day if I was trying to get higher voltage or current than what the Rigol supplied.
 

Offline Neuromodulator

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Re: A quick question about the Rigol DP832 power supply.
« Reply #8 on: December 25, 2015, 12:57:05 AM »
So as I understand it basically means current should only move from + to -. I found that when I charged a cap and turned the PS channel off, it discharged the cap, so I guess that kind of stuff should be avoided as I understand it. This would also mean that trying to charge a battery would be a bad idea too, unless i plug it when the channel is on.

I suppose a diode solves all this.
 


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