Title :
Development of a Compact 450-kJ Pulsed-Power-Supply System for Electromagnetic Launcher
Author :
Liu, Yi ; Lin, Fuchang ; Dai, Ling ; Zhang, Qin ; Lee, Li ; Han, Yongxia ; Li, Wenting ; Lu, Wanxin
Author_Institution :
Dept. of High Voltage Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
A 450-kJ pulsed-power supply (PPS) for electromagnetic launcher has been built up. It consists of six 75-kJ pulse forming units (PFUs). Each PFU is composed of a 75-kJ capacitor (1000 /12.2 kV), a thyristor stack as main switch, a diode stack as crowbar, a specific pulse-shaping inductor , and a coaxial cable. The peak value of the output current of one PFU is 85 kA with a peak time of 190 . The influencing factors of overvoltages on the series thyristor valves are studied by experiments and simulations based on PSCAD/EMTDC. A proper protection is used to prevent the series thyristor valves from being damaged by overvoltage when a switch is turned on. At the end, the total discharge currents of the PPS test with a short-circuit load and a railgun load are presented, respectively.
Keywords :
electromagnetic launchers; power capacitors; pulsed power supplies; thyristor applications; PFU; PPS test; PSCAD-EMTDC simulations; capacitor; coaxial cable; compact pulsed power supply system; crowbar; current 85 kA; diode stack; discharge currents; electromagnetic launcher; energy 45 kJ; energy 75 kJ; pulse forming units; railgun load; series thyristor valves; short-circuit load; specific pulse-shaping inductor; switch; thyristor stack; Electromagnetic launcher (EML); metalized polypropylene film capacitor; pulse forming unit (PFU); shaping inductor; thyristor;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2010.2050339
