
Final Design
- Transformer changed from 30:2 to 16:1 turns ratio:
- Halves the winding resistance
- Core loss now majority of transformer loss but total loss lower
- Slightly larger magnetizing inductance giving slightly smaller Lr -> lower inductor losses
- Increased switching frequency (e.g. 129kHz -> 155kHz at full load and 380V in)
- Semiconductor area was increased as well to lower conduction loss