Engineering notes, research updates, and ideas from the team building AI-assisted power electronics tools.
Why subsea inductive links trade the wet-mate connector for a different set of problems — seawater eddy loss, the frequency ceiling it imposes, pre...
Read more → 13 September 2026 · Dr. Fulong LiWhat changes when the gap grows from millimetres to a car's ground clearance — the 85 kHz operating point, double-sided LCC compensation, misalignm...
Read more → 13 September 2026 · Dr. Fulong LiHow an inductive charging pad actually works — coupling coefficient, series compensation, the efficiency ceiling set by kQ, the Qi handshake, and w...
Read more → 10 September 2026 · Dr. Fulong LiDerive thermal step response, cooling measurements and arbitrary-power temperature prediction, then fit Foster or Cauer models with explicit physic...
Read more → 10 September 2026 · Dr. Fulong LiDistinguish external thermal cycling from self-heating, define specimen temperature histories and connect package degradation to a measured stress ...
Read more → 10 September 2026 · Dr. Fulong LiMeasure steady thermal performance with controlled power and boundaries, distinguish junction-to-case from junction-to-ambient metrics and quantify...
Read more → 10 September 2026 · Dr. Fulong LiUnderstand abnormal-event test physics, energy accounting and protection limits without confusing switching characterisation with destructive robus...
Read more → 10 September 2026 · Dr. Fulong LiA complete learning map for power-device measurements, from static characteristics and double-pulse testing to thermal impedance, accelerated agein...
Read more → 10 September 2026 · Dr. Fulong LiDesign active thermal-cycling experiments, track real junction stress and distinguish package degradation from temperature and control drift.
Read more → 10 September 2026 · Dr. Fulong LiConnect operating histories, loss and thermal models to mechanism-specific life estimates, with worked calculations and correct treatment of censor...
Read more → 10 September 2026 · Dr. Fulong LiDetermine what a junction-temperature measurement represents, calibrate a temperature-sensitive electrical parameter and separate thermal behaviour...
Read more → 10 September 2026 · Dr. Fulong LiChoose electrical and environmental stresses from the failure mechanism, control the specimen conditions and distinguish persistent damage from rec...
Read more → 10 September 2026 · Dr. Fulong LiMeasure on-state resistance, output and transfer curves, threshold voltage, leakage and blocking behaviour with controlled temperature and a defens...
Read more → 10 September 2026 · Dr. Fulong LiDistinguish small-signal capacitance from switching charge, derive output charge and energy, and measure dynamic on-resistance with a controlled bi...
Read more → 10 September 2026 · Dr. Fulong LiDerive the double-pulse sequence, design the commutation fixture and extract switching energy and recovery behaviour without confusing device physi...
Read more → 16 July 2026 · Dr. Fulong LiWhy we published aipe.md — and how to use it with Claude Code, Codex, or any AI coding agent to design converters with real component data.
Read more → 19 January 2026 · Dr. Fulong LiThe architecture, energy flow and shared teaching specification for an SST built from a cascaded front end, isolated DAB modules and an AC output s...
Read more → 19 January 2026 · Dr. Fulong LiDerive amplitude-invariant Clarke and Park transforms, their coupling terms and power conventions, then obtain a basic synchronous-reference-frame ...
Read more → 19 January 2026 · Dr. Fulong LiDerive transformer turns, distinguish transfer and magnetising inductance, and connect DAB waveforms to winding, core, thermal and insulation requi...
Read more → 19 January 2026 · Dr. Fulong LiBuild the SST AC output from a two-level bridge, derive the LC-filter and dq models, and design cascaded current and voltage control before studyin...
Read more → 19 January 2026 · Dr. Fulong LiFrom one active bridge to a cascaded H-bridge front end: input-current equations, DC-link energy, modulation and capacitor-voltage balancing.
Read more → 19 January 2026 · Dr. Fulong LiConnect the three SST stages through explicit energy control, module sharing, startup states and a staged validation plan.
Read more → 19 January 2026 · Dr. Fulong LiDerive dual-active-bridge current waveforms, phase-shift power, RMS current and the low-frequency control plant, with explicit reference directions...
Read more → 19 January 2026 · Dr. Fulong LiA consistent derivation-led introduction to a dual-active-bridge converter, including phase-shift control, device stress, soft switching and labora...
Read more → 19 January 2026 · Dr. Fulong LiWhy solid-state transformers are studied for distribution, data centres, charging and microgrids, and how the application determines the conversion...
Read more → 16 December 2025 · Dr. Fulong LiWhy resonance beats hard switching — the LLC tank, FHA gain curves, ZVS, the capacitive region to avoid, and how to design and simulate one.
Read more → 15 December 2025 · Dr. Fulong LiDouble-ended topologies that drive the core both ways — how they differ in switch stress and transformer use, plus flux walking and the phase-shift...
Read more → 14 December 2025 · Dr. Fulong LiAn isolated buck — true transformer action, core reset, the duty limit, and the two-switch and active-clamp variants that fix its weaknesses.
Read more → 13 December 2025 · Dr. Fulong LiThe simplest isolated converter — coupled-inductor energy storage, turns ratio, leakage and clamps, CCM and DCM, and closed-loop design.
Read more → 12 December 2025 · Dr. Fulong LiThree converters that step up or down: the inverting Ćuk and non-inverting SEPIC and Zeta, with capacitive energy transfer and different port-curre...
Read more → 11 December 2025 · Dr. Fulong LiStep up or step down from one stage — the inverting buck-boost and its non-inverting cousin, from switching cycle to modelling, control and simulat...
Read more → 10 December 2025 · Dr. Fulong LiA practical path from the first switching cycle to modelling, feedback control, simulation, KiCad and a working buck-converter prototype.
Read more → 9 December 2025 · Dr. Fulong LiWhy small-signal models work, and how to derive a boost converter's averaged equations, operating point, transfer functions and right-half-plane zero.
Read more → 9 December 2025 · Dr. Fulong LiA practical path from the first switching cycle to modelling, feedback control, simulation, KiCad and a working boost-converter prototype.
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