In this paper, we review some major research results in Traveling Wave Tubular Linear Induction Motors technology, based on 'open literature"publications, which were obtained in the world in the last decades. One database analysis shows that coil launchers are covered in 68 of over 1000 electromagnetic launcher papers published, referred to 53 of them in this paper. The research program includes studies of history, types, applications, theories and analysis, design, and power conditioning of coil launchers with emphasising on traveling wave induction (Linear Induction Launcher) one. In the theories and analysis section, a preview i s given of current sheet model, current filament model, finite element method, and wavelet transform. In the design section, local and global optimisation algorithms and designing results is reviewed. In the fmal section, we review power conditioning of Capacitor Driven Coilguns and Generator Driven Coilguns, and concepts of "Magnetic Flux Compression" for generating pulses required to efficiently drive the coil launchers and LLDouMc+Fed Induction Launchers".
A bidirectional DC-DC converter with high power density is proposed in this paper. The presented converter provides power transfer in both directions only with adjusting phase-shift angle. Zero voltage switching (ZVS) in both turn on and turn off moments of all switches is the major capability of the converter that makes it suitable for high-power applications. ZVS of the converter is provided without any auxiliary devices. High-frequency transformers are employed in the converter structure to match the converter two sides voltage. Moreover, the transformer leakage inductance along with external auxiliary inductance acts as energy storage in power transfer from one side of the converter to the other side. Steady-state operation of the converter is analysed. ZVS criteria for the proposed converter are studied and finally, experimental measurement results of laboratory-scale prototype are presented.
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