DECOUPLED CONTROL TECHNIQUES FOR DUAL FLYING CAPACITOR BRIDGE POWER SUPPLIES OF LARGE SUPERCONDUCTIVE MAGNETS.

The authors show that the dual flying capacitor (DFC) circuit can be decomposed into two elementary single flying capacitor (SLC) circuits which can be controlled independently. The discovery of this decoupled control concept is the origin of several new control strategies which significantly improve the performance of DFC power supplies. Microcomputer controllers containing the decoupled control algorithm were tested on a DFC system simulator. The results show that time optimal load coil current and voltage control is now achievable by a robust bang-bang control technique. Furthermore, load coil current ripple and voltage spectrum can be independently controlled, while following an arbitrary reference signal. The DFC bridge, with the decoupled controllers, is a high-performance power supply candidate for superconductive magnets of fusion reactors, particle accelerators and other systems.

DECOUPLED CONTROL TECHNIQUES FOR DUAL FLYING CAPACITOR BRIDGE POWER SUPPLIES OF LARGE SUPERCONDUCTIVE MAGNETS. Academic Article