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General Design Formulas

(Using Sinusoidal Wave Forms)

 
N = 3.489 E x 106 (Turn)
        Bm f Ac Ks

H = 0.4947 N I (Oersted)
               l

Bm = 3.489 E x 106 (Gauss)
           N f Ac Ks

l = 3.192 x 106 m N2 Ac Ks (Henry)
                      l

E = 2.866 x 107 Bm N Ac Ks (Volt)

m = B (Gauss / Oersted)
      H

  N = Number of turns in winding
Bm = Max. flux density, gauss
E = RMS sine wave voltage of winding
H = Magnetizing force, oersted
L = Inductance, Henry
m = Permability, (CGS system) gauss/oersted
f = Since wave frequency, hertz
Ac = Core cross section area
(center leg width x stack height) inch²
Ks = Lamination stacking factor
(Ks x Ac = effective core area)
I = Current, ampere
l= Mean length of flux path, inch


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