High-compatibility LED centralized DC power supply system

Abstract

The invention discloses a high-compatibility LED centralized DC power supply system, which comprises M types of N power supply modules with the same output voltage average value, N Z-source impedors, an output busbar and an LED lamp bank connected with the output busbar, wherein an output positive electrode of each power supply module is connected with an input positive electrode of the corresponding Z-source impedor in a one-to-one correspondence manner; an output negative electrode of each power supply module is connected with the input negative electrode of the corresponding Z-source impedor in a one-to-one correspondence manner; the output positive electrode of each Z-source impedor is connected with a positive electrode of the output busbar; and the output negative electrode of each Z-source impedor is connected with a negative electrode of the output busbar. According to the high-compatibility LED centralized DC power supply system, output voltage and current fluctuation of the power supply modules can be inhibited, the output ripple content of the LED power supply system is reduced, the quality of output power is improved, the circulating current phenomenon among the power supply modules can be inhibited, the loss is reduced and the compatibility, the expandability and the reliability of the LED power supply system are improved. In addition, a short circuit of the busbar is avoided when one or more power supply modules are directly connected.

Description

technical field [0001] The invention relates to the technical field of DC power supply, in particular to a highly compatible LED centralized DC power supply system. Background technique [0002] The conventional multi-module parallel high-power LED centralized DC power supply system has been more and more used in daily life, which requires each parallel power supply module to have the same power structure, sometimes in order to ensure the reliability of the LED centralized DC power supply system , and even requires that each parallel power supply module must be the same type of power supply module produced by the same manufacturer, which greatly reduces the compatibility and scalability of the multi-module parallel high-power LED centralized DC power supply system. And when a power module fails in the conventional multi-module parallel high-power LED centralized DC power supply system, the user often has to go to the original manufacturer of the module for repair and replace...

AI Technical Summary

Problems solved by technology

[0002] The conventional multi-module parallel high-power LED centralized DC power supply system has been more and more used in daily life, which requires each parallel power supply module to have the same power structure, sometimes in order to ensure the reliability of the LED centralized DC power supply system , and even requires that each parallel power supply module must be the same type of power module produced by the same manufacturer, which greatly reduces the compatibility and scalability of the multi-module parallel high-power LED centralized DC power supply system

And when a power module fails in the conventional multi-module parallel high-power LED centralized DC power supply system, the user often has to go to the original manufacturer of the module for repair and replacement, which virtually causes time and economic costs. In addition, even though the parallel power modules in the conventional multi-module parallel high-power LED centralized DC power supply system are the same type of power module produced by the same manufacturer, due to the influence of components and external environmental factors, each module The output characteristics cannot be completely consistent, and there are fluctuations in the output voltage and output current. If the power modules are directly used in parallel, a "circulation" phenomenon will inevitably occur between the power modules, resulting in a significant increase in the reliability and efficiency of the entire LED power system. reduce

In addition, when one or more parallel power supply modules have a direct connection, it will cause a short circuit on the busbar, which poses a serious threat to the safety of the LED centralized DC power supply system.

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