Ultra-wide-range input power conversion device under strong interference conditions

Abstract

The present invention discloses an ultra-wide-range input power conversion device under strong interference conditions, and belongs to the power conversion device. The ultra-wide-range input power conversion device comprises a bleeder circuit, wherein the bleeder circuit comprises an AC power supply with a wide input range under strong interference, a first decoupling inductor, a graphite gap, a second decoupling inductor and a multi-layer voltage-sensitive device; an isolation side over-voltage protection circuit, wherein the isolation side over-voltage protection circuit comprises a gas discharge tube, a common mode inductor and a bidirectional transient suppression tube; a voltage stabilizing / voltage limiting circuit, wherein the voltage stabilizing / voltage limiting circuit comprises a voltage control circuit and a hysteresis classification controller; a DC-DC power conversion circuit, wherein the DC-DC power conversion circuit comprises a first stage DC-DC module, a second stage DC-DC module, and an output protection switch; and an output protection circuit. According to the device disclosed by the present invention, power conversion in a wide input range of 20:1 under strong interference conditions can be achieved, a multi-mode and multi-level interference suppression technology is used, and it is ensured that the power supply will not be damaged even if it is directly disturbed by lightning, so that the overall anti-interference and change bearing capacity in the wide input range of a power supply system can be improved.

Description

technical field [0001] The invention belongs to a power conversion device, in particular to an ultra-wide range input power conversion device under strong interference conditions. Background technique [0002] With the rapid development of the national economy, there are more and more electrical equipment used in the field environment, such as various field environmental monitoring, equipment monitoring equipment, transmission line monitoring equipment, etc. In these special external environments, there is often no power supply network to provide power for them. It is necessary to use some special methods to harvest other forms of energy from the surrounding environment of electrical equipment, such as taking power from sunlight, wind, electromagnetic waves, high-voltage power supply lines, and ultra- Lightning protection ground wires for high-voltage transmission lines, etc. [0003] This type of power supply method has two main problems. One is that it is very vulnerable ...

AI Technical Summary

Problems solved by technology

[0004] At present, the vast majority of field power supply equipment only uses basic one-level or two-level anti-interference components to suppress the interference of the power supply, which can play a protective role in the general form of space interference, but for those completely exposed to the wild, or even directly suffer For some power supply devices struck by lightning, it cannot play a protective role

Most of the existing power conversion devices have relatively narrow restrictions on the input voltage range. The input voltage range of the general power supply is mostly ±20% of the rated voltage, and some wide-range power supplies can only reach 2:1 or 4:1. It can be seen that some special-purpose power supplies that have been reported to work under the input range of 10:1 have a very wide input adaptability, but these power supplies still cannot meet the dynamic range requirements in some special applications. , it is easy to damage the power supply

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