Resonant link inverters for trapezoidal flux electrically commutated machines

摘要: To increase their usability wind and kinetic-tidal generators Electric Vehicles (EVs) require efficient conversion between mechanical electrical energy. The brushless dc machine (BLDCM) is entirely suitable for such a task, to exemplify its use this thesis details high efficiency energy generator test system. maximise the yield it uses low solidity turbine, an transmission system, BLDCM generator, maximum power point tracker. cogging torque also addressed. Measured results are presented, with measured of water-turbine being 30%in real-world conditions. Although converter, requires electronic control; soft-switched Actively Clamped Resonant DC Link Inverter (ACRLI) ideal choice such. This complete mathematical analysis ACRLI topology, develops formulae all important voltages, currents, timing. A list loss major components, including MOSFET clamp device, presented. These can be used optimally design ACRLIs, optimal 10 kW EV described. Since inductor in problematic, addresses large ferritecored design, analysing hysteresis eddy current core Litz wire conduction loss. An but non-realisable shown, followed by near-optimal, realisable economical very design; was fabricated accordance resonant link operation, less than 20W 10kW inverter, consistent theory. BLDCM’s applicability general field has been questioned due rectangular versus speed characteristic. modify characteristic voltage booster could used. provide boosting addition few main one rectifier grade thyristor, thus creating Link-Boost (ACRL-BI) topology. new topology analysed along thyristor dv=dt snubber, control method minimum switching frequency, novel driver interface use. kWACRL-BI prototype built boost operation shown.