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Боль, Юрген
01.04.13
Кандидатская
2003
Санкт-Петербург
141 с. : ил
Стоимость:
499 руб.
SAINT-PETERSBURG STATE POLYTECHNIC UNIVERSITY
Electromechanical Faculty Electro-Physics and High-Voltage-Techniques Special Subject 05.14.12, High-Voltage-Techniques Assistance: Prof. Dr. V. Titkov
Investigations of Closing Switches based on Spark Gaps with Extremely High Repetition Rates and Potential Electromagnetic Compatibility Applications
Juergen Rolf Bohl
List of Contents
1 Introduction
1.1 Status of Technology
1.2 Phenomenological Observations and Delimitation
of the Work
1.3 New Aspects of the Work
1.4 Objectives
2 Literature
2.1 Pulsed Power Technology
2.1.1 General Applications
2.1.2 Spark Gap Operation
2.1.3 General Static Spark Gap Analysis
2.2 High Voltage Switches for Pulsed Power Applications
2.2.1 Vacuum and Gas Filled Switches
2.2.1.1 Spark Gap
2.2.1.2 Cold Cathode Switching Tube
2.2.1.3 Krytron
2.2.1.4 Sprytron
2.2.1.5 Thyratron
2.2.1.6 Ignitron
2.2.1.7 Vacuum Discharge
2.2.2 Solid State Devices
2.2.2.1 Thyristor
2.2.2.2 GTO-Thyristor
2.2.2.3 MOSFET
2.2.2.4 Insulated Gate Bipolar Transistor (IGBET)
2.2.2.5 Photo-Conductive Switches
Pacte
2.2.2.6 Advantages and Disadvantages of
Semiconductor Switches
2.3 High Power Generators - Transmission Line Generators
2.3.1 Blumlein Generator
2.3.2 Self-Matched Transmission Line Generators
2.3.3 Pulse Forming Network (PFN) Marx Generators
2.4 Spark Gap Applications in Various Technologies
2.4.1 Transmitter Technology
2.4.2 Radar Technology
2.5 Conclusion
3 Electrical Model of the Fast Switching Device
3.1 Time Dependent Resistance of the Spark Gap
3.2 Modelling with Constant Current Source
3.3 Modelling with Constant Voltage Source and
Charging Resistor
3.4 Cascading of several Fast Switching Devices
3.5 Discussion of Numerical Simulation Results
4 Experimental Investigations
4.1 Test Set for Electrical Investigations
4.2 Macroscopic Experimental Investigations
4.2.1 Objectives
4.2.2 Test Matrix
4.2.3 Characteristic Macroscopic Electrical Test Results
4.2.4 Test Parameter Dependencies
4.2.5 Electron Emission Mechanisms
4.2.6 Electro-Technical Model of PRR with two Modes
These devices offer great flexibility and can be manufactured to meet the demands of specific applications, which may require alternative output pulse width, output impedance or higher output voltage.
Table 2.3.2-1 describes the performance of a typical self-matched transmission line generator used in the pulse power technology.
Table 2.3.2-1: Characterisation of a typical self-matched generator
TLG(S)-02, SAMTECH, Co., UK
Maximum Output Voltage: 70kV (O/C load)
Output Impedance: 5Q to 50Q
Pulse Width: 250ns - 500ns
Pulse Rise Time: 25ns
Maximum Output Current: 8kA
Maximum Energy/Pulse: 60J
Pulse Repetition Rate: 1Hz
2.3.3 Pulse Forming Network (PFN) Marx Generators
PFN Marx generators are suitable for moderate to low energy applications (10-100J), including high speed triggering and drivers for x-ray or microwave generators [27].
PFN Marx generators produce a rectangular output pulse. They possess a well-defined output impedance, which depends upon the number of stages, and a pulse duration dependent upon the length of transmission line comprising each stage. These devices can be operated at pulse repetition rates of a few tens of Hz.
A spark gap column is used as the switching element. This means that the generator can be operated simply by pneumatic control. In situations where
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