Method and apparatus for controlling and switching main and backup power

A technology of main and backup power supply and main power supply, applied in the field of power supply, can solve the problems of inability to guarantee the power supply, imperfection, and no protection measures for the main power supply, and achieve the effect of effective and normal power supply and perfect switching control.

Active Publication Date: 2008-06-18
CHENGDU HUAWEI TECH
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AI Technical Summary

Problems solved by technology

[0009] The existing technology only detects the undervoltage of the main power supply through the undervoltage detection module, so that the main power supply can be switched from the main power supply to the backup power supply when the main power supply is lower than the undervoltage point, but there is no corresponding protection measure when the main power supply voltage is too high. This causes damage to the device and power supply load of the main and standby power supply switching control
As a result, the switching control of the main and standby power supplies is imperfect, and it is impossible to ensure safe power supply to the load.
[0010] It can be seen that the existing main and standby power supply switching control scheme has the disadvantage of imperfection

Method used

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  • Method and apparatus for controlling and switching main and backup power
  • Method and apparatus for controlling and switching main and backup power
  • Method and apparatus for controlling and switching main and backup power

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0031] Referring to FIG. 3 , it is a schematic structural diagram of a device for master-standby power switching control according to an embodiment of the present invention. The device includes a main power switch module 110 , an overvoltage and undervoltage detection module 120 , a backup slow start module 140 and a backup control module 130 .

[0032] The overvoltage and undervoltage detection module 120 is used to detect the overvoltage and undervoltage of the main power supply voltage input to the device, and detect the indication signal that the output voltage is normal when the voltage is normal; detect the indication signal that the output voltage is abnormal when the voltage is overvoltage or undervoltage .

[0033] The main power switch mo...

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Abstract

The invention discloses a device used for controlling the switch of a main power supply and a backup power supply. The device comprises a main circuit power switch module, an over-voltage and under-voltage detecting module, a backup starting module and a backup control module. The invention also discloses a method used for controlling the switch of the main power supply and the backup power supply. The proposal of the embodiment of invention leads to a more perfect switch control of the main power supply and the backup power supply.

Description

technical field [0001] The invention relates to power supply technology, in particular to a method and device for switching control of main and standby power supplies. Background technique [0002] In the design of electronic equipment or electronic circuits, in order to improve the reliability of equipment or system operation, it is often necessary to set a backup power supply corresponding to the main power supply; in the implementation scheme of setting the backup power supply, the switching control of the main and standby power supplies is one of the most critical technical links one. [0003] Referring to FIG. 1 , it is a schematic structural diagram of an active / standby power switching control device in the prior art. The device includes a main circuit power switch module, an undervoltage detection module, a backup circuit slow start module and a backup circuit control module. [0004] The undervoltage detection module is used to perform undervoltage detection on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCH02J9/06
Inventor 李华福陈继高
Owner CHENGDU HUAWEI TECH
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