High-voltage and intermediate-frequency AC/DC conversion system

Abstract

The invention relates to a high-voltage and intermediate-frequency AC / DC conversion system. The objective of the invention is to solve the technical problems of eddy current loss, differences in steady voltage output and instable output voltage in rectification of an existing high-voltage intermediate-frequency AC / DC conversion system. The high-voltage and intermediate-frequency AC / DC conversion system of the invention comprises an input rectification and filtering circuit, a power conversion circuit, an output rectification and filtering circuit, a driving circuit and a control circuit, wherein the power conversion circuit includes a power transformer and a phase-shifted full-bridge circuit which is connected with the input end of the power transformer; the input end of the output rectification and filtering circuit is connected with the power transformer; the output end of the output rectification and filtering circuit is connected with the control circuit; and the output end of the input rectification and filtering circuit and the output end of the driving circuit are correspondingly connected with the power transformer through the phase-shifted full-bridge circuit. With the high-voltage and intermediate-frequency AC / DC conversion system adopted, current leakage will not exist in the whole operation process of the circuits. Compared with the existing high-voltage and intermediate-frequency AC / DC conversion system, the high-voltage and intermediate-frequency AC / DC conversion system of the invention can better reduce the eddy current loss and enables more stable output voltage.

Description

technical field [0001] The invention relates to an AC / DC conversion system, in particular to a high-voltage intermediate-frequency AC / DC conversion system used on an aircraft. Background technique [0002] At present, the 28V low-voltage DC power supply system is mostly used in the aircraft power supply system. The main power supply for this DC voltage is mostly a permanent magnet AC generator, and the voltage on the voltage line output by the generator is mostly a three-phase AC power of several hundred volts. , the frequency of the current is several kilohertz, and the above voltage and current cannot directly supply power to the equipment on the aircraft. In order to solve the above problems, relevant technical personnel have designed an AC / DC conversion system dedicated to the above aircraft. In some systems, a high-voltage intermediate frequency AC / DC conversion module is used to convert AC power into 28.5V DC power, which together with the generator constitutes the mai...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, to meet the actual needs, and to provide a high-voltage intermediate frequency AC / DC conversion system, which aims to solve the problem of eddy current loss and output steady-state voltage in the current high-voltage intermediate frequency AC / DC conversion system. Differences, unstable output voltage, lack of protection circuits, technical problems related to large volume of system modules

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