Simulation of Capacitor Charging Power Supply for Pulsed Tea Co2 Laser

The paper describes the simulation of high voltage capacitor charging power supply (CCPS) which will be used to charge the primary capacitor bank (4.5µF) up to 3 - 5kV which will be further used to charge the main capacitor bank (38nF) up to 50kV (maximum). The capacitor bank will be discharged through a gaseous medium using high voltage thyratron and will be used to operate pulsed Transversely Excited Atmosphere Carbon-dioxide (TEA CO2) lasers at 200 Hz repetition rate. A high frequency series resonant converter topology has been adopted for the CCPS. This topology provides zero current switching (ZCS) which reduces switching losses, allows higher frequency operation and increases compactness of the power supply which overall increases the efficiency of the system. The output current of power supply is limited by variable frequency control technique. The simulations are carried out in ORCAD PSPICE, version 10.5. Simulation of results for series resonant converter based capacitor charging power supply has been carried out to prove the validity of theoretical analysis.