Serially connected electricity supply power supply for multi-stage depressed collector traveling wave tube

Abstract

The invention relates to a serially connected electricity supply power supply for a multi-stage depressed collector traveling wave tube. The serially connected electricity supply power supply comprises a primary voltage converter, wherein the output end of the primary voltage converter is connected with a primary coil N0 of a multi-winding high-voltage transformer T1, N secondary coils of the multi-winding high-voltage transformer are respectively connected with the input ends of N rectification filter circuits, the output positive ends and the output negative ends of every two adjacent rectification filter circuits are connected, the output positive end of the first rectification filter circuit is connected with a tube body of the traveling wave tube, the output negative ends of the first to (N-1)th rectification filter circuits are connected with the (N-1) collectors of the traveling wave tube, the output negative end of the N-th rectification filter circuit is connected with the cathode of the traveling wave tube, and the output end of a voltage sampling circuit is connected with the feedback signal input end of the primary voltage converter. The serially connected electricity supply power supply has the advantages that secondary power supplies share one converter, the voltage output speed of each stage of power supply maintains consistency, the reliability is high, the secondary power supplies are connected in series and are superimposed, and the voltage withstanding value of an output filtering capacitor is reduced, so that the size of the whole power supply is greatly reduced, and the power density is high.

Description

technical field [0001] The invention relates to the technical field of radar transmitters, in particular to a series-connected power supply for multi-stage step-down collecting pole traveling wave tubes. Background technique [0002] Traveling wave tubes are widely used in radar, electronic countermeasures, satellite communications and other fields. In order to improve the efficiency of traveling wave tubes, it is an effective method to use multi-stage step-down collectors. At present, two-stage and three-stage step-down There are two main power supply methods for voltage collector traveling wave tubes and step-down collector traveling wave tubes: parallel power supply and series power supply. [0003] Among them, the parallel power supply is that the cathode and collector of the traveling wave tube are powered by independent power supplies, the common end of the power supply is connected to the cathode of the traveling wave tube, and each power supply works independently of...

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Problems solved by technology

[0003] Among them, the parallel power supply is that the cathode and collector of the traveling wave tube are powered by independent power supplies, the common end of the power supply is connected to the cathode of the traveling wave tube, and each power supply works independently of each other; the disadvantage is that due to the independent power supply, Its volume is large, and secondly, because the power supplies of all levels of the collector float on the cathode potential, the output withstand voltage requirements are high, and the closed-loop sampling of the power supply needs to adopt high-voltage isolation measures, and its implementation is complicated and the cost is high

Series power supply uses multiple independent power supplies in series, and the highest voltage obtained after series connection supplies power to the cathode, and the remaining power supplies supply power to each collector of the traveling wave tube according to the collector voltage requirements of the traveling wave tube; the disadvantage is that when the working ratio of the traveling wave tube When it changes, the power supply of the collector will change accordingly, which will cause the cathode voltage after series superposition to also change. For the traveling wave tube transmitter, the power accuracy and stability of the cathode of the traveling wave tube generally require higher High, and the accuracy and stability of the collector power supply can be an order of magnitude lower than that of the cathode power supply. Therefore, when the load changes in series power supply, in order to meet the stability and accuracy of the cathode voltage, the remaining groups of power supplies must also meet high precision and high Stability requirements increase cost and implementation difficulty

[0004] It can be seen that the series power supply method and the parallel power supply method have their own advantages and disadvantages, and the series power supply method is easier to implement, but both have a common disadvantage: both have multiple independent power supplies, and the volume and weight are relatively large. In the case of strict weight restrictions, it is difficult to use these two power supply methods

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