All solid-state pulsed power generator with semiconductor and magnetic compression switches

Conventional pulsed power sources using gas switches suffer from short lifetime, low PRF and expensive maintenance cost. Many all solid-state generator topologies have been developed to replace them. Marx modulator utilizing IGBTs as main switches has many advantages, such as variable pulse length and PRF, snubberless operation, inherent redundancy. However, the relatively slow turn-on speed of IGBT influences the pulse rise time of the Marx modulator. In this paper, a newly developed all solid-state pulsed power generator is proposed. This generator consists of a Marx modulator based on IGBT half bridge modules and a magnetic pulse sharpening circuit, which is employed to compress the rising edge of the Marx output pulse. The pulse sharpening circuit is composed of two magnetic compression switches and one peaking capacitor. The experimental results demonstrated the effectiveness of pulse sharpening. The design of IGBT drive circuits and magnetic switches is introduced in detail in this paper.

[1]  M.P.J. Gaudreau,et al.  Solid state radar modulators , 2000, Conference Record of the 2000 Twenty-fourth International Power Modulator Symposium.

[2]  J. Kolar,et al.  Active gate control for current balancing in parallel connected IGBT modules in solid state modulators , 2008, 2007 16th IEEE International Pulsed Power Conference.

[3]  R.L. Cassel.  An all Solid State Pulsed Marx Type Modulator for Magnetrons and Klystrons , 2005, 2005 IEEE Pulsed Power Conference.

[4]  Jian Qiu,et al.  Repetitive and High Voltage Marx Generator Using Solid-state Devices , 2007, IEEE Transactions on Dielectrics and Electrical Insulation.

[5]  Hidenori Akiyama,et al.  An all-solid-state pulsed power generator using a high-speed gate-turn-off thyristor and a saturable transformer , 2002 .

[6]  Jian Qiu,et al.  An all solid-state pulsed power generator based on Marx generator , 2007 .

[7]  A. Krasnykh,et al.  A solid state Marx type modulator for driving a TWT , 2000, Conference Record of the 2000 Twenty-fourth International Power Modulator Symposium.

[8]  G.H. Rim,et al.  Repetitive Nanosecond All-Solid-State Pulse Generator Using Magnetic Switch and SOS Diodes , 2005, 2005 IEEE Pulsed Power Conference.

[9]  G.E. Dale.  Pulsed modulator for an IEC neutron source , 2007, 2007 16th IEEE International Pulsed Power Conference.