High voltage pulsecharger for precision high voltage pulse application

Pulse power supply systems producing high current, short pulses has a key role in injection and extraction systems in Synchrotron Radiation Sources (SRS) as well as in LASERS. These systems require high voltage power supplies to charge pulse power system capacities to required voltage in a time available between pulses. Pulse charging is a compact, reliable and proven technique to deliver required charge in short time to charge pulse power capacities. Basically in pulse charging, charge transfer from low voltage capacitor to high voltage capacitor is achieved using a step-up transformer in a single pulse. Power supply has been developed to charge a 60 nF capacitor bank to 60 kV in 300 μs at 25 Hz. A Phase-Shifted PWM based power supply is used for charging the low voltage capacitors. The paper describes the critical aspects of design and performance evaluation of the H.V. pulse charging power supply. (author)