An automatic switching single-phase rectifier bridge series circuit

Abstract

An automatic switching single-phase rectifier bridge series circuit comprises an electromagnetic coil TA, a rectifying circuit, an integrated voltage regulator circuit and a power supply circuit which are connected with each other. The automatic switching single-phase rectifier bridge series circuit is characterized by further comprising a switching circuit. The rectifying circuit comprises a low-voltage rectifier bridge BG1 and a high-voltage rectifier bridge BG2 which are connected in series, and the low-voltage rectifier bridge BG1 is in serial connection with the input end of the high-voltage rectifier bridge BG2 and in parallel connection with the output end of the high-voltage rectifier bridge BG2 in a land shared mode. The switching circuit switches full-wave rectification of the low-voltage rectifier bridge BG1 and half-wave rectification of the low-voltage rectifier bridge BG1 and the high-voltage rectifier bridge BG2 by means of the situation whether to short the high-voltage rectifier bridge BG2. The automatic switching single-phase rectifier bridge series circuit has the advantages that full-wave rectification of the low-voltage rectifier bridge is controlled by controlling conduction of an MOS switch Q through a constant voltage comparator, when an input voltage is lower than a current-limiting threshold, energy is collected to the maximum extent, energy loss is reduced, and power supplied to a sensor is ensured under the conditions that a high-voltage line has low load and even has no load.

Description

technical field [0001] The invention relates to a voltage-limiting switching series rectifier bridge circuit, which is used for rectifying the secondary circuit in a CT power-taking circuit, provides power supply with a wide dynamic range of 1V / 40μA-20V / 50mA, and is used for installation on a 10kV-110kV high-voltage transmission and distribution circuit self-powered sensor power supply. Background technique [0002] In electric high-voltage self-powered sensors, CT induction is commonly used to take power, and the energy utilization of weak power sources with a voltage lower than 3V adopts a voltage doubler rectification method to increase the voltage amplitude to meet the input requirements of voltage-stabilizing integrated circuits, and the energy loss of weak power sources It is very large and often does not meet the power supply requirements. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies ...

AI Technical Summary

Problems solved by technology

[0002] In electric high-voltage self-powered sensors, CT induction is commonly used to take power, and the energy utilization of weak power sources with a voltage lower than 3V adopts a voltage doubler rectification method to increase the voltage amplitude to meet the input requirements of voltage-stabilizing integrated circuits, and the energy loss of weak power sources Very large, often does not meet the power supply requirements

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