From: Neil <picdude3@narwani.org>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Mon, 3 Feb 2020 19:43:17 -0800
Subject: Re: [EE] Power transmission
Thread-Topic: [EE] Power transmission
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Oh, wasn't thinking of transmitting at 60Hz.  I assumed I'd have an=20
oscillator driving the coil.

The method you suggest doesn't sound complicated, though it assumes a=20
known frequency first.  But I could iterate it on a spreadsheet for=20
several frequencies.
I could start all the way back from a fixed amount of input power, and=20
chart coil size vs frequency.  But I still need to figure out the next=20
stages before getting the power out the other side.

Cheers,
-Neil.




On 2/3/2020 6:31 PM, Jim wrote:
>   It seems to me that at 60 Hz (50 Hz), there would have to be a large
> number of turns to provide enough reactance to
>   keep from the line seeing a short.  So, determine a resistance value
> that you would be comfortable with, rearrange
>   the inductive reactance formula to get you the inductance value needed
> to get that reactance value at the line
>   frequency, then use a coil formula to determine the number of turns
> needed for that inductance and frequency.
>   This sounds labor intensive, but it really isn't that bad.  This is the
> way I would start outif I were doing this.
>  =20
> Regards,
>
> Jim
>
>> -------- Original Message --------
>> Subject: [EE] Power transmission
>> From: Neil <picdude3@narwani.org>
>> Date: Mon, February 03, 2020 4:40 pm
>> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
>>
>>
>> I'm tinkering with power transmission for getting power from behind a
>> wall panel to in front.  For now I'm just experimenting with the idea,
>> but I can't find much info on the relationship between coil diameter,
>> wire diameter, number of turns, frequency, and distance.
>> Anyone here know anything about this?
>>
>> Cheers,
>> -Neil.
>>
>>
>> --=20
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