[simpits-tech] AC dimmers and transformers

[geneb]

On Mon, 27 Oct 2014, Matt Bailey wrote:

> Question: What sort of dimmer device is typically used in old business
> jets? Just a standard triac? I'm trying to figure out exactly what is
> in my Sabreliner.
>
> Second question: how tolerant are typical aircraft AC transformers and
> power regulators to variations in frequency? For instance, I have
> 115v/400hz coming off my inverter, but it breaks down to 5v AC for
> lighting (and 26v AC for other stuff). I'm wondering how critical it is
> to maintain the 400hz frequency.

Matt, typically variable transformers are used for dimming - at least 
that's what I've found.  If you're going to use the original variable 
transformers, you'll need to feed them 400Hz.

g.


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