Author: Jaeckle, H.     [Jäckle, H.]
Paper Title Page
THPO011 Practical Experience with Self-optimizing, High Dynamic Control of Accelerator Magnet Power Supplies 3355
 
  • H. Jäckle
    PSI, Villigen, Switzerland
  • F. Jenni, X.H. Ke
    FHNW, Windisch, Switzerland
 
  In 1999, the first fully digitally controlled magnet power supplies were commissioned at PSI (Paul Scherrer Institute, Switzerland). Today, approximately 1000 of them are in use at PSI and a multiple of that worldwide. An extended PI structure is used for control. PI control is very effective and simple to use but the attainable dynamic performance is usually limited by the higher order characteristics of the output filter and the load. For the future we expect increasing requirements from highly dynamic applications, such as beam orbit feedback systems and fast scanning magnets for proton irradiation of tumors. Therefore, a self-optimizing power supply control system was developed in collaboration with the University of Applied Sciences Northwestern Switzerland. It is based on the second generation of PSI digital power electronics controller, which allows more complex control algorithms and higher sampling rates. This paper presents the achieved dynamic performance of the new control structure for various types of power supplies and magnets and compares them with the dynamic performance obtained using standard PI control.