artificial load question

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yef smith

Joined Aug 2, 2020
1,446
Hello,I need to test the ability of my system to deliver varios pulses from 2A -80A and 50V 300ns pulses to a load.
Two questions:
1.One way I thought is to use the following resistor type,but its 200W and I dont know how it can handle very high pulses.

2.is the an artificial load device that i could set him to be "5 ohm" for example and it will handle the power pulses which would come to it?
Is the some device (not very expensive that could do that?
Thanks.
https://www.digikey.ie/en/products/...hm-electronic-co-ltd/HoRX-200W-20R-5/28007308
 

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wayneh

Joined Sep 9, 2010
18,087
Hello,I need to test the ability of my system to deliver varios pulses from 2A -80A and 50V 300ns pulses to a load.
Two questions:
1.One way I thought is to use the following resistor type,but its 200W and I dont know how it can handle very high pulses.

2.is the an artificial load device that i could set him to be "5 ohm" for example and it will handle the power pulses which would come to it?
Is the some device (not very expensive that could do that?
Thanks.
https://www.digikey.ie/en/products/...hm-electronic-co-ltd/HoRX-200W-20R-5/28007308
80A at 50V = 4000 watts

I'd be tempted to use high wattage (500W?) incandescent lightbulbs in parallel. You'll get a visual feedback and the bulbs are purpose-built to safely dissipate their rated wattage, and to survive the brief inrush current before the filament heats up.

300ns isn't a lot of time. You need to think about the duty cycle - how often such a pulse comes along.

A fuse rated to 50A might well survive a short pulse to 80A as long as it has time to recover. The fuse manufacturers publish detailed tables showing how time and current combinations affect time to blow.
 

MisterBill2

Joined Jan 23, 2018
27,164
Before we (Others and myself) spend any time evaluating this challenge, I suggest providing a much mire detailed description of the project and the load.

That specification could easily be the detonator for a nuclear weapon, or a "railgun". Both of those are not allowed on this forum.
EDITED ADDITION:
Some voltage AND current specifications of the different pulses, and what impedance load they would be intended to drive.
A "dead-short" load will accept any voltage any current "pulse"but will be the correct test for the pulse generating system. So, very seriously, we need to know the voltage and intended current of the typical pulses that would be delivered by the system you need to test.

Otherwise, random guesses .
 
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