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Power supply for an in-flight entertainment system

Discussion in 'Power Electronics' started by adhi17895, Mar 11, 2019.

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  1. adhi17895

    adhi17895

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    Mar 11, 2019
    I am currently designing a power supply unit for an in-flight entertainment system. I am kind of new at this, so I dont know how to design the pcb layout for the power supply. Is it the normal layout as for power supplies or is it something different?. Secondly, where does the input for the power supply connect to?. i know it connects to an AC source of the generator, but how does it connect?. If anybody dealing with avionics power supply, please help me out in this.
     
  2. Alec_t

    Alec_t

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    Welcome to EP!
    There isn't a 'normal' layout. There are probably as many layout variations as there are designers/builders of power supplies.
    The fact that you are asking about how it connects is a concern. If you're not familiar with avionics layouts/connections, how will you make sure that anything you build won't cause interference with already-installed avionics? This could be safety-critical.
     
  3. adhi17895

    adhi17895

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    Mar 11, 2019
    Im building the power supply according to the specifications of the aircraft. I know the design and how to make a power supply. But I just wanted to know whether there is a particular layout for an aircraft power supply which I now know there isn't. I have just started work in a startup, and they want me to design a power supply for powering the IFE. I know it is on the side of saftey-critical, but it would be helpful if there is any extra things to be noted while designing it.
     
  4. Alec_t

    Alec_t

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    I'm surprised those specs don't set out all the connector parameters.
     
  5. dave9

    dave9

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    With all due respect, I get the feeling you are not yet ready to be hooking things up to an airplane's electrical system. :)

    The first step would be familiarizing yourself with that electrical system so you can answer your own question.

    Since I don't know anything about avionic electrical, I can only speculate that you may need to determine if the generator is sufficiently sized to handle this additional electrical load, and if so, put the extra capacity into the battery charging circuit if it doesn't also have enough reserve capacity, then look at what the reserve capacity is on the battery itself and whether it needs upgraded, and look at a cutoff circuit if the engine were to lose power so this add-on is not drawing power away if/when it is critically needed for something else (or is that ALL powered by a separate turbine?). I'd imagine the cutoff could be something as simple as a normally open relay powered closed by the generator but again I know nothing about avionics electrical systems and regulations which is probably where this should all start.

    I doubt it's going to be "layout" per se, as much as the robustness of the design including the temperature tolerance, PCB, connectors, wires, vibration resistance, etc. though this is a non-critical system so fault tolerance seems the main issue.
     
    Last edited: Mar 11, 2019
    davenn likes this.
  6. davenn

    davenn Moderator

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    totally agree with @dave9

    @adhi17895 .... this really does seem to be way out of your league .... I suggest a few years of university electronic engineering
    followed by a few more years of avionics training


    thread closed
     
    weddingceleb likes this.
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