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Current equalizing circuit of remote direct-current power supply

A remote power supply and circuit technology, applied in the field of DC remote power supply, can solve the problems affecting the stability and service life of the system, the large fluctuation range of the output voltage of the system, and the low current sharing accuracy of the current sharing circuit, so as to enhance the stability. And the effect of service life, improving current sharing accuracy, and stabilizing output voltage

Inactive Publication Date: 2013-06-26
SHENZHEN WEILIN JINLONG COMM TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The current sharing accuracy of the existing current sharing circuit is not high, and the output voltage fluctuation range of the system is large, which cannot meet the requirements, which affects the stability and service life of the system

Method used

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  • Current equalizing circuit of remote direct-current power supply
  • Current equalizing circuit of remote direct-current power supply
  • Current equalizing circuit of remote direct-current power supply

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Embodiment Construction

[0013] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] figure 1 It is a schematic diagram of a current equalizing circuit provided by the present invention.

[0015] figure 2 is the current sampling diagram; figure 2 To sample the output current of the module, the sampling resistor is R19, and the obtained sampling signal is IS1.

[0016] image 3 is the enlarged view of the current signal;

[0017] Figure 4 is the current comparison output graph; Figure 4 U3 in the circuit is TL431, and the left half of the circuit gets a reference voltage VR1, and the current sampling signal IS1 is input...

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Abstract

The invention provides a current equalizing circuit of a remote direct-current power supply. Via double control of software and hardware, a sampling error of current is eliminated; via revising optimization of software, current equalizing precision among modules is improved, and output voltage of a system is stabilized. The technical scheme includes that a CPU (central processing unit) control end is added, via comparison amplifying of equalized current calculated by a CPU and sampled current, and via the double control of the software and the hardware, the sampling error of the current is eliminated, the current equalizing precision among the modules is improved, and the output voltage of the system is stabilized. Compared with the prior art, the current equalizing circuit of the remote direct-current power supply has the advantages that higher current equalizing precision is realized, the output voltage of the system is stabilized, stability of the system is enhanced, and service life of the system is prolonged.

Description

technical field [0001] The invention relates to the technical field of DC remote power supply, in particular to a current equalizing circuit. Background technique [0002] DC remote power supply is more and more widely used as a power supply method to solve the construction of mobile base stations, EPON and indoor and outdoor computer rooms. The DC remote power supply is composed of two parts: the local end and the remote end. Composite optical cables, twisted-pair cables or power cables are sent to the remote end to provide stable, reliable and economical power supply for communication equipment that is inconvenient to connect to local electricity or unstable in power supply. The communication equipment and the transmission distance require that the local power supply part of the remote power supply system needs to provide a large power output, usually up to several kilowatts. Considering the stability of the system, it is also required that the power supply needs to have a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10
Inventor 王晓波
Owner SHENZHEN WEILIN JINLONG COMM TECH
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