Design Steps for a Forward Transformer

1. Determine Primary Turns (Np): Select a core. Given minimum input voltage (Vs), on-time (Ton), and chosen flux density amplitude (ΔB, typically 0.2-0.25T for forward converters), calculate: Np = (Vs * Ton) / (Ae * ΔB) (where Ae = core cross-sectional area).

2. Determine Secondary Turns (Ns): Based on required output voltage (Vo), diode forward voltage (Vd), and primary voltage reflected to secondary (Vs * Ns/Np), calculate: Ns = (Vo + Vd) * (Np / Vs).

3. Calculate Primary Current & Wire Size: Sketch primary current waveform (reflected from secondary inductor current during switch-on). Its RMS value is: Iprms = (Ip * Vo/Vs) * sqrt[((KRP²)/3 - KRP + 1) * D]. Select primary wire based on this RMS current and current density.

4. Calculate Secondary Current & Wire Size: The secondary current waveform is the inductor current during switch-on. Its RMS value is: Isrms = Ip * sqrt[((KRP²)/3 - KRP + 1) * D]. Select secondary wire based on this RMS current and current density.

5. Design Reset Winding: Add a reset winding (typically opposite polarity to primary) to facilitate core reset via voltage clamping or other methods.

Why Golden Eagle High-Frequency Transformers Gain Customer Recognition:

1. Lean One-Piece Flow: Eliminates work-in-progress (WIP) pile-up.

2. Full Automation: Automated processes from winding and assembly to comprehensive testing.

3. Premium Materials: 100% materials sourced from globally recognized suppliers, ensuring quality from the origin.