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Old 20th December 2012, 02:40 AM   #1
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Default Variable load device

I am looking for circuit or part that will actively route a high energy sine wave in the following manner:

Device/Part has constant input power wave A
Device/Part output Branch A1 receives main power on a variable load
Device/Part output Branch A2 receives A-A1 residual power

What should I be looking at?
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Old 20th December 2012, 03:40 AM   #2
DUG is offline DUG  Canada
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All I can suggest is that you should look at giving more details so you may get a meaningful answer to your questions.

I could suggest an answer that would be correct but might not be what you are looking for.

A circulator.

Circulator - Wikipedia, the free encyclopedia

Question answered.

Was that what you were looking for?
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Old 20th December 2012, 03:56 AM   #3
Minion is offline Minion  Canada
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possibly use a rheostat which are basicly high power potentiometer/Variable resistor ..... You could use one to vary the load resistance on a power amp output ...... That is if I understand your question correctly ......
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Old 20th December 2012, 03:58 AM   #4
Enzo is offline Enzo  United States
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Solid state amps or tube?


Let me try a guess. You want to take an amp putting out say 100 watts and run it through a thing that lets you send some amount to a dummy load and the rest to a speaker? You'd need something related to an L-pad maybe. SHows the amp a constant impedance but output is variable.

There you go, two L-pads on the same shaft, one wired reverse of the other. One for each load.
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Old 20th December 2012, 11:27 AM   #5
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Thanks all for your input but it looks like DUG has understood my need the best. The electrical function required was described in the first post and it didn't specify an amplifier but hinted at line/load conditioning. The device/part needs to immediately route low frequency AC power on demand to one main branch output A1 while allowing the remaining power to be used on a subjugated residual branch output A2 with minimal loss ideally represented as A=A1+A2 and A2=A-A1 where A1 is described as a variable load.

Last edited by gmaslin; 20th December 2012 at 11:35 AM.
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Old 20th December 2012, 11:56 AM   #6
DF96 is offline DF96  England
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Not sure what you mean by 'constant input power' - whatever is driving this automatically adjusts its voltage to deliver the same power whatever the load? Do you really mean constant input voltage?

If you want a useful answer then you will have to give us more information. At present we don't understand the question, and some of us may suspect that you don't understand the question either.
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Old 20th December 2012, 02:32 PM   #7
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Seems like the electrical equivalent to a differential drive. E
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Old 20th December 2012, 04:42 PM   #8
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DF96
Yes, the wave pulse is constant and ideally should be used completely and no, I don't believe it will work automatically because the main branch will use from 1-95% of the total power output. The output must be differential because one branch is critical and variable and the other is not. The design MUST be able to make this power allocation in real time (less than 50 milliseconds) or it will not work properly. What leads you to conclude that I don't know what I mean?

mickeymoose
If what you mean is some kind of torque distributor, then yes, I need the main branch to use only as much of the power as it needs and the residual branch to take up what's left without competing with the main branch. The voltage will be constant so all that is left to do is insure that none of the current goes untapped.

Last edited by gmaslin; 20th December 2012 at 04:48 PM.
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Old 20th December 2012, 05:19 PM   #9
DF96 is offline DF96  England
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Quote:
Originally Posted by gmaslin
What leads you to conclude that I don't know what I mean?
Statements like this:
Quote:
Yes, the wave pulse is constant and ideally should be used completely
You appear to be mixing up power and voltage, and may in addition be trying to treat a low frequency problem as though it is an RF problem.

As I said, we need more information. What exactly are you trying to achieve?

Last edited by DF96; 20th December 2012 at 05:19 PM. Reason: typo
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Old 20th December 2012, 08:12 PM   #10
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DF96
Voltage is factor of power, where did you see me confuse the two? As I stated earlier, I have an AC power source that is fixed at a given voltage. I need a way to branch it so that one output has demand control and the other doesn't. My objective seems plain to me, what are you having trouble understanding? In addition, we are in the ELF realm so why bring up RF?
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