A 4-quadrant 300kW-peak high precision and bandwidth switch mode power converter for particle accelerator magnets supply

Abstract

A switch mode AC/DC-DC power conversion topology is proposed for the supply of particle accelerator correction magnets, requiring simultaneously high peak power (300kW), high bandwidths (1kHz in voltage, 300Hz in current), high current precision (10 -4 ), EMC emissions according to international standards and current/voltage reversibility (4-quadrants operation). The power part dimensioning key issues are presented, including semiconductor power cycling design, high frequency power filtering, DC-link bus stability analysis. The feedback controls strategy and suited PWM techniques are reported. Experimental results are presented and commented.

DC Powering Solutions for the Future Circular Collider: Converter Topologies, Protection, and Control

“…Here, there are also significant differences between the FCC and a conventional HVDC network. Due to the high electric fields used in klystrons, internal arcing can happen with relatively high frequency [14], leading to DC short-circuits more often than in conventional HVDC links. Under the scenario considered, where the klystrons share a common DC bus, this fault must be cleared very quickly to avoid damaging the sensitive RF equipment.…”