Got to love car power amplifiers.
1mm, how much power do you require in your transformer and at what primary voltage? Maybe you can get away with a power op-amp? Maybe a few transistors? We have no clue as to what you are trying to do.
This post is related to the following posts:
Using toroidal power transformer in high-frequency application.
https://www.eevblog.com/forum/index.php?topic=2469.0Adj. +/-60V to +/-70V DC Power Supply.
https://www.eevblog.com/forum/index.php?topic=2457.0AC Constant Current Source (2Apk-pk, 10~20kHz) - Possible?
https://www.eevblog.com/forum/index.php?topic=2149.0My ultimate goad is to build an AC source which is capable of supplying a 10kHz 1.0A sinusoidal current (peak-to-peak) to an inductive load (R=0.5ohm, L=4mH).
At 10kHz, the impedance is Z = 0.5 + 2*pi*10000*0.004 = 251.83ohm.
At 10kHz, a peak-to-peak voltage of 251.83V (or, 89.05Vrms) is required to push 1.0Apkpk sinusoidal current through the load.
To my knowledge, there is no power opamp or integrated power audio amplifier IC in the market which is able to provide such a high output voltage.
Thus, I plan to connect a transformer to the output of a low voltage but high power amplifier (e.g. the output of high power integrated audio amplifier IC, or the output of commercial audio amplifier unit) to step up the voltage to the desired level.
Let's say the maximum rms voltage supplied by a commercial audio amplifier unit is 45Vrms.
Thus, I need a transformer with a step-up transformation ratio of at least two (2).
For a transformation ratio of two, the power amplifier must be able to supply a current of at least 2.0Apkpk (or, 0.707Arms) to the transformer primary winding at 10kHz.
Toroidal core will be used to construct the transformer.
Kindly advise.