Rapid Capacitor Charger with advanced Digital Control

Research output: Contribution to conferencePaperpeer-review

Abstract

We are reporting on the design of a compact capacitor charger with a rated output voltage of 50 kV and a power rating of 10 kJ/s. The input source is a 208V, 3-phase AC utility supply. The charger shall fit into an 19 inch, 5U enclosure. The core of the charger is a HV-power pack containing a high-frequency transformer with a nano-crystalline core, multiple output windings using litz-wire and integrated HV rectifiers. The primary of the transformer is driven by an H-bridge inverter with advanced IGBTs and matching High Power Drivers. The control is through a state-of-the-art Digital Signal Controller (DSC) with fast cycle-by-cycle Peak current mode control, leading edge blanking, and high resolution, fast, automated slope compensation for current loop stability. The DSC runs at 5X of the speed of the main processor core for ns level PWM resolution.<br>We are reporting on the design and experimental test results.
Original languageEnglish
DOIs
StatePublished - Mar 15 2022

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