No. The transformer is designed for 100 KHz.  I had it wound special for me.

----- Original Message ----- 
From: "Sean Breheny" <shb7@cornell.edu>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Saturday, August 09, 2008 11:34 AM
Subject: Re: EE


> As usual I realized after I hit send that you probably just divided :)
> I should further engage brain before engaging mouth (or typing
> fingers).
>
> Hmmm...somehow, though, it sounds to me like he wants to put a 100KHz
> sine wave through a transformer designed for 50 or 60Hz. If so, I
> don't think that will work very well in terms of core losses, skin
> effect losses, winding capacitance, reduced coupling from pri to sec,
> etc.
>
> If, on the other hand, he is using 100KHz PWM to synthesize a 50Hz
> sine wave, for example, then that should work well (although the PWM
> frequency is a bit high).
>
> Sean
>
>
> On Sat, Aug 9, 2008 at 8:42 AM, Apptech <apptech@paradise.net.nz> wrote:
>>> Where did you get 16 ohms from?
>>
>> R = V/I.
>> The driver sees the load reflected via the transformer. If
>> 230 VAC causes 14 amps to flow then the AC is seeing 230/14
>> ~= 16.
>>
>> In the absence of load the actual transformer impedance will
>> be seen but it will very usually b swamped when loaded.
>>
>>
>>            Russell
>>
>>>>>> I have to drive a transformer primary at 230 VAC @ 14
>>>>>> Amps @ 100KHz.  I have not yet measured the primary
>>>>>> impedance, but I will.
>>>>
>>>> The impedance you see will be about 16 ohms - ie the
>>>> load,
>>>> more or less regardless of the transformer's unloaded
>>>> impedance.
>>>>
>>>>
>>>>        Russell
>>
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