Electronics > Beginners
HF transformer primary volts per turn calculation
(1/1)
gkmaia:
For the following core configuration
N27 material
Gap = 0.5mm
Total inductance factor of the core: AL = 438 nH
Effective permeability of the core: μe = 207
Relative permeability of the core material: μr = 2300ur
Frequency = 60Khz
Ae = 173 mm2
I got 0.05 volts per turn on primary. Is that calculation correct?
T3sl4co1l:
What Bmax?
I suppose it's not an insanely large core, so 100mT might be fine, 200 even (maybe not 300+ especially being closer to saturation?).
In any case, V/N = 4.44*Bmax*Ae*F, or 4.0 instead of 4.44 for square rather than sine wave (volts in RMS in either case). So around 9V/turn.
l_g, l_e (not specified) and the mu's have no bearing on this calculation; they are freely adjustable and independent of Bmax. (They set the current required to reach Bmax.)
If instead you specify a required Lpri and Isat(min), then these data are necessary.
Tim
gkmaia:
Sorry, my previous calculation was a bit wrong.
Hopefully this spreadsheet attached has improved. I am trying to keep my Bmax under 1500.
So basically the voltage I need my primary to handle is the plot attached.
Navigation
[0] Message Index
Go to full version