Freelancer profile translated to English.
Back to original languageAbout Eithel
Power electronics engineer – design of power converters / energy conversion.
With over 10 years of R&D experience, I master the complete design of static converters, from theoretical sizing to validated prototype.
My areas of expertise:
Sizing of DC-DC, AC-DC, and DC-AC converters
Mastered topologies: buck/boost, bridgeless PFC, totem-pole PFC, series/resonant LLC, full-bridge/half-bridge
On-Board Chargers (OBC) (based on GaN/SiC switches)
High industrial power (40 to 150 kW): thyristor/diode rectifiers + resonant LLC inverter for induction furnaces
Tools: LTspice, PSIM, PLECS, Altium Designer, Ansys Maxwell (magnetics)
Constraints: efficiency, EMC, thermal management (liquid/air cooling)
My added value:
I don't just limit myself to simulation. I design, I prototype, I bench test, and I deliver a functional device. Rigorous and solution-oriented, I support your projects from specification to validation.
I offer my services for:
→ Power architecture consulting
→ Converter sizing (DC-DC, PFC, LLC)
→ Efficiency simulation and optimization
→ Design review and DFMEA analysis
→ Prototype debugging assistance
Available for one-off missions or ongoing support.
Based in Nanterre – remote work.
French
Native or bilingual
English
Fluent
Italian
Fluent
Remote only
Primarily works remotely
Experience
- INDUCTION – Turin, Piémont, ItaliePower Electronics Engineer (R&D)ENERGY AND UTILITIESMarch 2015 - November 2017 (2 years and 8 months)Turin, Italy1. Diode / Thyristor Rectifiers for the AC-DC input stageObjective: convert the three-phase grid (400V AC) into a stable DC voltage to power the resonant inverter stage.Thyristor rectifier (half-controlled or fully controlled bridge) for 80-150 kW, allowing gradual DC voltage control and inrush current limitation.Contributions:Semiconductor sizing (voltage withstand, average and peak current, thermal losses).DC-link filter calculation (smoothing inductor + capacitive bus) to minimize current ripple.RC snubber design for commutation protection of thyristors.Waveform simulation using LTspice (firing angle, power factor).Result: rectifier stage validated on resistive loads up to 150 kW with current THD <8% (with passive filtering).2. Resonant LLC Converter (power stage for the furnace)Objective: supply the induction coil at high frequency (10-50 kHz) with a sinusoidal AC voltage to generate eddy currents.Topology: full-bridge inverter with series resonant circuit (LLC).Contributions:Resonant cell sizing (Lr, Cr, Lm) to ensure Zero Voltage Switching (ZVS) across the entire load range.Calculation of the transformer ratio, core selection (FeSi sheets or ferrite for HF), stranded copper winding.IGBT selection (up to 1200V) with desaturation protection.Transient regime simulation: startup, load variation (insertion of a metal part), overload protection.Thermal tests: water cooling system design (heatsink blocks on IGBTs and diodes).Result: 40 kW to 150 kW induction generators, overall efficiency (rectifier + inverter) >92% at full load.
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Education
- ENGINEERING DEGREEPolytechnic University of Turin2014