Seamless and circulation-less switching system for two groups of DC (direct current) power supplies

A DC power supply and switching system technology, applied in emergency power supply arrangements, electrical components, circuit devices, etc., can solve problems such as system power failure, achieve reliable performance, solve circulating current problems and output power failure problems, and have a simple and novel structure.

Active Publication Date: 2012-03-07
ZHANGZHOU KEHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the method of "cutting off first and then putting on" is adopted, the risk of system power failure may be caused due to the switching time of the switch

Method used

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  • Seamless and circulation-less switching system for two groups of DC (direct current) power supplies
  • Seamless and circulation-less switching system for two groups of DC (direct current) power supplies
  • Seamless and circulation-less switching system for two groups of DC (direct current) power supplies

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Embodiment Construction

[0032] Examples, see figure 1 As shown, a seamless non-circulating current switching system of two sets of DC power supplies of the present invention includes positive and negative terminals used to connect with electrical equipment, a first branch circuit connected to the first DC power supply, and a first branch circuit connected to the second DC power supply. The second branch of the two DC power sources and the switching circuit 20, wherein the first DC power source is a battery DC1, the second DC power source is a battery DC2, the positive port is Vout+, and the negative port is Vout-; the first branch and the second The branches are connected in parallel and then connected between the positive and negative terminals to realize the connection between the first DC power supply, namely the battery DC1 or the second DC power supply, namely the battery DC2, and the electrical equipment; , the first switch K1 and the second switch K2 formed by DC contactors in the second branc...

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Abstract

The invention discloses a seamless and circulation-less switching system for two groups of DC (direct current) power supplies. The system comprises an anode port and a cathode port which are connected with electrical equipment, a first branch connected with a first DC power supply, a second branch connected with a second DC power supply, a switching circuit, a voltage sampling circuit, a current sampling circuit and a control module, wherein the switching circuit comprises a first switch, a second switch, a third switch and a fourth switch; the first switch and the second switch are connectedin the first branch and the second branch respectively and composed of DC contactors; the third switch and the fourth switch are composed of controllable electronic switch devices; and the third switch and the fourth switch are connected in parallel with the first switch and the second switch respectively. The system adopts DC contactors for switching and one-way conducting controllable electronic switch devices for compensation; in the automatic switching process of the DC power supplies, the problems of circulation and output power down in the switching of the DC power supplies can be effectively solved, and the seamless and circulation-less switching among the DC power supplies is realized; and the system has the characteristics of simple and novel structure and reliable performance.

Description

technical field [0001] The invention relates to the technical field of power supply switching, in particular to a seamless non-circulating current switching system of two sets of DC power supplies. Background technique [0002] With the advancement of science and technology, all walks of life have higher and higher requirements for power supply reliability. In many occasions, multiple power supply backups must be used to ensure the reliability of power supply. With the improvement of power supply reliability requirements, more and more advanced technologies and equipment are put into application in the power supply system. For example, the communication base station introduces battery master-slave backup in the hybrid backup power supply system of "mains power + diesel engine + battery" to improve the reliability of power supply. As another example, when the main unit of the UPS is abnormal in the mains and the battery inverter output, it can also introduce two sets of mast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
Inventor 陈成辉邹建忠曾奕彰
Owner ZHANGZHOU KEHUA TECH CO LTD
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