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  1. X

    Non-changing current with C-EMF

    Well said @Gryd3 ! I'm just thinking of solutions to such a problem, where back-emf is present and there is a circuit has low resistance, and require high current, and needs high voltages to manage with back-emf. I think maybe a dc/dc converter could be an option :)
  2. X

    Non-changing current with C-EMF

    What does this have to do with LEDs?o_O Well I have but the most basic ones you can imagine. Hm, it really just one portion of the circuit( you can pick any) that is exposed to the magnetic field, but the idea of using a dc/dc converter is playing with my mind now, greatly! :cool: If resistance...
  3. X

    Non-changing current with C-EMF

    @Gryd3 what do you think of the idea of a dc-dc converter, that has power input of 300W controlling the voltage to 3V, and 100A?
  4. X

    Non-changing current with C-EMF

    But then again, if there is a constant resistance of 1 Ohm, and require 3V and 100A, we could use a dc convert and a 300W PS?
  5. X

    Non-changing current with C-EMF

    It's a bit mind boggling that in order to maintain the same current (100A) when back-emf is induced(2V) almost about 10,000W is needed to maintain the same current, or maybe I missed something again @Gryd3, @(*steve*) ?
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    Non-changing current with C-EMF

    Ops, well that's a lot.
  7. X

    Non-changing current with C-EMF

    Why did I assume it's impossible to solve such a problem :rolleyes:, by adding a resistor alone would work but certainly a resistor that can handle the dissipation of 200W... I mean if current is going to be 100A, and resistance is 1 Ohm.
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    Non-changing current with C-EMF

    Allowing the power source to compensate.
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    Non-changing current with C-EMF

    For my example I think a reasonable solution would be, adding a 1Ohm resistor that can handle such power.
  10. X

    Non-changing current with C-EMF

    But... then again im talking about the resistance of the circuit, where I should focus on the voltage and the internal resistance of a PS. @Gryd3 , in my example isn't the internal resistance of the PS the important factor to control V? not the circuit's resistance? I think I'm now confused.
  11. X

    Non-changing current with C-EMF

    I assumed things completely wrong.... I thought that a power source that has a supply of 300W can manipulate the voltage to the value required, and the current to the value desired. Even if the resistance of the circuit is low, because if it is low... the voltage required to sustain such current...
  12. X

    Non-changing current with C-EMF

    Gryd3, In the case of a constant current source, how can the voltage be altered without changing the resistance of the circuit? Using the example I provided, how would things work out? To maintain 100A, what would be the result, how much power is needed before back-emf, and after back-emf is...
  13. X

    Non-changing current with C-EMF

    @Steve,to increase voltage wouldn't the circuit's resistance change to increase the voltage and maintain the same current? Say we have a circuit that's resistance is 0.01 Ohms(that's the resistance of the conductors, so it should be fixed) the induced-emf(back-emf)is calculated to be 2V(it's...
  14. X

    Understanding resistance more.

    Okay, so I'm a bit confused about how resistors work. I understand they increase the resistance of circuit an all, but look at this example: We have a circuit that's resistance is 0.003Ω and a power supply of 1kW, based on ohms law we can calculate the Voltage: 1.73V so the current flowing...
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    Non-changing current with C-EMF

    This concept can be applied to all kinds of conductors, and circuits? Even circuits that carry kA, to conductor's that are quite large(busbars)etc...
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    Non-changing current with C-EMF

    A constant current source "changes" its voltage to maintain the same current right? So that the whole time current is the same? Only voltage is changing throughout the process? How long does it take to maintain current if it indeed does decrease -then-increases due to the constant current...
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    Non-changing current with C-EMF

    Ah, forgot to state that this is an experiment demonstrating how current in a conductor can be maintained in the presences of a changing magnetic flux. This is a simple diagram schematic: Therefore, we can't shield the magnetic field, and the methods of how the flux changes does not matters...
  18. X

    Non-changing current with C-EMF

    I have a circuit, that has an exterior magnetic field, that changes. Naturally, the conductor will produce an opposing EMF & an opposing current. My circuit requires, a constant current regardless of C-EMF, of course with the supply of more power. Now, how can this be solved in a general? 1)...
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