Modeling and Control System Design of Marine Controlled-Source Electromagnetic Detection Transmitter

摘要

Marine electromagnetic transmitter transmits large power variable frequency electromagnetic wave to theseabed so as to obtain the submarine structure and mineral resources. The mathematical model of controlled source circuitneeds to be established to realize closed loop control for increasing control precision and output transient performance ofthe electromagnetic wave. The operation process of controlled circuit is analyzed in continuous current mode, twoequivalent switching states of controlled source circuit are obtained through the analysis of the different states of theswitch in a switching period. A small signal equivalent model of the system is established using small rippleapproximation. For high output voltage fluctuation problem in single loop control, double loop control strategy of voltageloop and current loop is designed. The simulation and experimental results show that, the system has the advantages offast transient response speed and good regulation performance.