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Controller for switching main power supply

A technology of control device, main and backup power supply, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of abnormal load power supply, large forward voltage drop, low voltage, etc., to achieve easy heat dissipation and improve reliability. , the effect of reducing pressure drop and loss

Inactive Publication Date: 2007-06-20
HUAWEI TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a switching circuit for main and standby power supplies, aiming to solve the problem of overvoltage after the circuit is combined due to the large forward voltage drop when the main and standby power supplies are isolated by diodes in the prior art multi-channel low-voltage circuit power supply system. Low, the problem of abnormal power supply to the load

Method used

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  • Controller for switching main power supply
  • Controller for switching main power supply
  • Controller for switching main power supply

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention more clear, 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.

[0045] The invention adopts the low-voltage drop components as the isolation device for the main circuit power supply and the backup power supply, forms a low-voltage drop isolation circuit with other circuit components, and realizes the isolation of the main circuit power supply and the backup power supply. By comparing the voltage difference between the main power supply and the backup power supply and the combined output voltage, the on and off of the isolation device is controlled, and the main power supply and the backup power supply are switched flexibly to ensure the normal operation of th...

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Abstract

The invention is concerned with circuit control field to afford a kind of switch control equipment for main backup power. The main switch and control unit controls the open and close to power supply circuit of main electrical source, according to the press different of pressure of main electrical source and export pressure of combined way. The backup switch and control unit controls the open and close to backup electrical source gateway, according to the press different of pressure of main electrical source and reference pressure. The said main switch and control unit and backup switch and control unit each owns one low dropout switch components. It takes active switch as switch component of main backup electrical source to advance action of switch and reduce voltage drop and waste. It is fit for low press circuit to realize the same insulation action as a diode. It realizes the uninterruptible switch of two electrical sources, improves the dependability of system and the radiating of all components is easy.

Description

technical field [0001] The invention belongs to the field of circuit control, in particular to a switching control device for main and standby power supplies. Background technique [0002] In a low-voltage two-way or multi-way power supply system, the main power supply usually supplies power to the load. If the main power supply fails and cannot supply power to the load, switch to the backup power supply, and the backup power supply supplies power to the load. Both the main power supply and the backup power supply use diodes as isolation modules to prevent the backup power from flowing back into the main power supply after the main power supply fails. [0003] Figure 1 shows the composition of a main-standby power switching circuit that adopts diode isolation in a multi-channel power supply system, and the circuit includes multiple main-circuit power supplies and a backup power supply. When diodes are used to isolate the main power supply and backup power supply, when the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
Inventor 吴建权
Owner HUAWEI TECH CO LTD
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