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Diseño de Autoinductancia

Referencia técnica sobre Diseño de Autoinductancia para el diseño, integración e implementación de sistemas de energía inalámbrica.

6 minArtículo 26/50Diseño de Bobinas

Self-Inductance Design — educational diagram — Fig.: Diagrama educativo de “Self-Inductance Design”.

Self-inductance L characterizes energy stored in the coil's own magnetic field per ampere. In WPT, L appears in resonant frequency formulas, impedance matching, and soft-switching conditions. Transmitter and receiver each carry an L that must pair with tuning capacitors C to hit the operating band and stay there under misalignment.

L is not constant in operation — ferrite saturation, nearby metal, and temperature change L by percents that matter to high-Q systems.

01Setting L targets

Derive from chosen topology (series/parallel/LCC) and operating frequency.
Include margin for ± capacitance tolerance and L drift over temperature.
Verify L at min and max gap, not only nominal.

Self-Inductance Design — supporting diagram — Fig.: Ilustración de apoyo para “Self-Inductance Design”.

02Measurement

Use impedance analyzer at operating frequency with coil in final potting and ferrite configuration. Open-short-load calibration on the fixture. Document test frequency and amplitude — L can vary slightly with drive level near saturation.

03Adjustment methods

Turn count change (production-friendly if planned).
Ferrite shims or tile removal (last resort in field).
Switchable compensation banks on the PCB (control complexity).