A study of constantly-sampled high power factor converters using error-tracking mode PWM scheme for control method

摘要

A single-phase high power factor converter applying the constantly-sampled Error-Tracking Mode PWM scheme with feed-forward control of the load current is investigated. A fabricated 1kW, ac 100V input, dc200V output converter using this control scheme successfully demonstrated both high speed dc voltage response and low distortion of the ac input current. The measured efficiency, power factor and THD are 95%, 1.0 and 2.0% respectively. The obtained equivalent circuit is in good agreement with the theoretically predicted one.