LLC谐振网络(变压器)的计算公式 - 240W

Parameters choice:

Resonance frequency:f.r =66(kHz)select a value between f.sw.min and f.sw.msx

Margin factor for Q.min value:k.marg =0.9starting value in the range: 0.80 - 0.95

Calculations:

Ideal transformer transfer ratio:n = 5.446

Maximum required gain:M.max = 1.200

Minimum required gain:M.min =0.955

Max normalized frequency:f.n.max = 1.124

AC equivalent resistance:R.ac =144.848(Ω)

Inductance ratio (L.r/L.m):λ =0.228

Minimum quality factor value:Q.zvs =0.473

Min operating frequency:f.sw.Min =45.087(kHz)In case the calculated min frequency f.sw.Min is lower Minimum normalized frequency:f.n.min =0.683or higher than the expected frequency f.sw.min , please

increase or decrease the resonance frequency f.r , unless

you accept the obtained minimum switching frequency value. Calculated resonant capacitor value:C.r =35.174(nF)

Please use the higher standard value:C.r.std =39(nF)

Transformer turn ratio:N.T = 6.035

Transformer leakage inductance:L.r =149.000(μH)

Transformer primary inductance:L.p =802.000(μH)

Primary side rms current I.prim.rms = 1.571(A)

Secondary side rms current I.sec.rms = 5.027(A)

In case the relationship: TgΦ≥ X is not verified,

choose a lower value for k.marg , and iterate the process.

enter data into cyan cells

HALF-BRIDGE RESONANT CONVERTER DESIGN: