Title :
Solid State Switched Modulator for Power Magnetron
Author_Institution :
CTMSP, Univ. of Sao Paulo, Sao Paulo
Abstract :
A pulsed power modulator to be used as a magnetron driver was designed, assembled and tested. The modulator setup consists basically of a 9 kV dc high voltage power supply, a resonant charging circuit, a 14 Omega and 2 mus pulse forming network, and a high voltage pulse, pulse-transformer. The pulse transformer secondary circuit provides a high voltage pulse of 40 kV to the magnetron cathode. Initially, the modulator tests were conducted using a conventional hydrogen thyratron as switching device. Then the thyratron was replaced by an IGBT module switch in order to compare the electric behavior of both switches. Finally, the paper describes not only the electric performance of two modulator circuits using the voltage and current pulse waveforms, but also it discusses some details of IGBT module gate drive circuit.
Keywords :
driver circuits; magnetrons; modulators; power semiconductor switches; power supplies to apparatus; switching circuits; thyratrons; IGBT module switch; gate drive circuit; high voltage power supply; high voltage pulse; hydrogen thyratron switching device; magnetron driver; modulator circuits; power magnetron; pulse-transformer; pulsed power modulator; resonant charging circuit; solid state switched modulator; voltage 40 kV; voltage 9 kV; Circuit testing; Magnetic modulators; Magnetic resonance; Magnetic switching; Pulse circuits; Pulse modulation; Pulse transformers; Pulsed power supplies; Solid state circuits; Switches;
Conference_Titel :
IEEE International Power Modulators and High Voltage Conference, Proceedings of the 2008
Conference_Location :
Las Vegas, NE
Print_ISBN :
978-1-4244-1534-2
Electronic_ISBN :
978-1-4244-1535-9
DOI :
10.1109/IPMC.2008.4743667
