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Puente Completo Desfasado

Referencia técnica sobre Puente Completo Desfasado para el diseño, integración e implementación de sistemas de energía inalámbrica.

6 minArtículo 25/50Electrónica de Potencia

Phase-Shifted Full Bridge — educational diagram — Fig.: Diagrama educativo de “Phase-Shifted Full Bridge”.

Phase-shifted full bridge (PSFB) delays one bridge leg relative to the other to control power while attempting ZVS on leading and lagging legs. Industrial WPT at higher power sometimes adopts PSFB or related variants for controlled gain into the resonant tank.

Light load often loses lagging-leg ZVS — auxiliary circuits or mode changes address that region.

01Operating regions

Heavy load: good ZVS on both legs with manageable circulating energy.
Medium load: tune dead time and magnetizing current for transitions.
Light load: add burst mode or alternate topology behavior to limit loss.

Phase-Shifted Full Bridge — supporting diagram — Fig.: Ilustración de apoyo para “Phase-Shifted Full Bridge”.

02Tank interaction

PSFB output is a modulated square wave rich in harmonics — the WPT tank selects fundamental behavior but harmonic content affects loss. Co-design filter or resonant network with phase-shift modulation limits.

03Implementation

Symmetric layout for leg inductance balance.
Current transformers or shunt sensing for per-leg diagnostics.
Validate ZVS with varying DC bus from PFC regulation.