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Investigation on Explosive Magnetic Generator of Frequency

Author: ZhaoBo
Tutor: ChenDongQun
School: National University of Defense Science and Technology
Course: Physical Electronics
Keywords: MFCG Magnetic frequency generator Broadband radiation
CLC: TN782
Type: Master's thesis
Year: 2010
Downloads: 42
Quote: 0
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Abstract

Magnetic flux compression the magnetic frequency generator (EMGF) A burst magnetic compression generator (EMCG) device directly drive capacitive loads broadband radiation device. Explosive driving the armature to compress the magnetic field, and the explosives can be converted into electromagnetic energy and LCR oscillation in the loop is formed, and then radiated out through an antenna (or solenoid). EMGF as a direct drive device, its small size, light weight, low cost and running costs, according to some reported in the literature, it is able to generate broadband or ultra-wideband electromagnetic radiation. In this paper, both from the theoretical and experimental aspects of direct feed type and indirectly feed EMGF of a preliminary study. In theory, analysis EMGF equivalent circuit model, expounded on the principle EMGF current oscillation process. The analysis calculated various loss EMGF running and explain the measures to be taken in the design process. The inductance, resistance and other parameters of the apparatus are calculated, the calculation will be non-ohmic loss is equivalent to the ohmic losses. PSpice simulation software on the device during the operation of circuit simulation, the simulation results of the output parameters of the feeding current, the load current and load voltage, basically consistent with the experimental results. Based on previous experience and theoretical calculations, experimental design and processing two types of EMGF. Improved experimental conditions and measurement systems, in particular, to establish and improve the the broadband radiation measurement system and successfully used in the experiment, several experiments prove the experimental environment safety, accurate delay control charging and discharging system stable and reliable measuring system. Design and test a several EMGF device is divided into feed directly and indirectly feed two the indirect feed device with a 23 nF and 10 pF capacitive load directly fed electrical device capacitive load of 10 pF. All the devices in an outer diameter of approximately 130 mm, a length of about 200 mm. Two types of EMGF measured with a waveform similar to the shape of relevant literature, the two devices running time of approximately 25μs, the oscillation time for the load current and radiation is approximately 15μs. Indirect feed EMGF typical experiment, the charge storage capacitor 2 kV, the maximum value of the load current is 2.2 A, the radiation field intensity maximum of approximately 598 V / m at 10 m distance apparatus, the oscillation frequency of the radiation 12.5 MHz range. Fed directly electric EMGF storage capacitor charging 3 kV, the maximum value of about 0.8 A to give the output load current, means in the distance of 10 m obtained radiation field strength maximum of about 209 V / m, the radiation oscillation frequency within the range of 12.5 MHz . The peak current and peak radiation field stronger than indirect feed a small electric EMGF. The two EMGF device performance is stable and reliable, repeatable, validated EMGF able to generate broadband electromagnetic radiation \found a larger load capacitance able to to cause new EMGF high-frequency radiation mechanism. Forward will require a more theoretical and experimental study.

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