Line driver for power line

Discussion in 'Wireless & RF Design' started by stephen163, Mar 29, 2010.

  1. stephen163

    Thread Starter New Member

    Nov 12, 2009
    5
    1
    Does anyone know of a suitable amplifier for driving the primary of an inductive coupler coupled to a power line (so the secondary is just one turn, i.e., the power line passing through the toroidal coupler).

    The frequencies are between 10 kHz and about 3 MHz and the supply voltage should be off batteries. The drive current, idealy, should be as high as possible - maybe a few amps. The input impedance to the power line is quite variable, but is probably between 50 ohms and 700 ohms (this is a medium voltage overhead power line) - but since the coupler is split core, it is loosely coupled to the power line.
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Is it Current transformer.
    Do you have a drawing that represent the circuit?
     
  3. stephen163

    Thread Starter New Member

    Nov 12, 2009
    5
    1
    It's a current transformer in a sense, but not quite the same as a device used to measure power frequency current, rather this is a magnetic core with the secondary as the power line (one turn) and a coil wrapped around the core such that it is magnetically coupled to the power line. It is for injecting radio frequency signals onto the line - however, because of loose coupling, the mutual reactance between the power line and primary is low, necessitating the use of a high permeability core and a higher current, therefore I need a line driver amplifier for the 10 kHz - 3 MHz range of frequencies. For this reason, I think it's ok to assume the load is mostly resistive. I thought it would be easy to find an amplifier to do this job and even though there are a lot of IC's designed for homeplug and ADSL, I haven't been able to find one that can drive a higher current.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    760
    Then ur application requires a sort of a RF transmitter.
    I donno there are DIY kits that have high power
     
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