CN201113549Y - Power backup system - Google Patents

Abstract

The utility model relates to an electric power redundant system, this electric power redundant system comprises an instantaneous power supply system and a power source switching unit, its purpose is for improving the structure that traditional uninterrupted power system can't directly provide electric power, this electric power redundant system is connected with a normality power supply system at least, when this normality power supply system output power is unusual, this instantaneous power supply system and this normality power supply system's output is connected to this electric power source switching unit of this electric power redundant system, and select to provide the electric power of drive load by this normality power supply system when normality power supply system normally operates, and then produce the action of a switching power supply system when outage, voltage instability or this normality power supply system work are unusual, select to maintain the power supply with this instantaneous power supply system, keep a period of sustainable work of load.

Description

Power backup system

technical field

A power backup system, especially a backup system that changes the power output structure and combines with a power supply to ensure the normal operation of the system.

Background technique

If the computer equipment encounters power failure or power instability, the system will be shut down abnormally or data will be damaged, and in severe cases, the body will be damaged, resulting in inestimable losses. To avoid this situation, the power supply of the computer equipment can be connected to The traditional uninterruptible power supply system (Uninterruptable Power Supply, UPS), and use the power provided by the traditional uninterruptible power supply system to make the power supply continue to maintain the computer equipment to work, so as to allow the computer equipment to save the normal shutdown time; while the traditional uninterruptible power supply The connection structure between the system and the power supply is shown in Figure 1. When the city power is normally supplied, the power supply has an AC input terminal 11 to obtain AC power. The control unit 15 controls at least one switching element 17 to adjust the converted power of a transformer 14, and outputs it through a back-end rectifying unit 16, and the traditional uninterruptible power system 60 is also connected to the city power, and sequentially passes through the uninterruptible power system 60 An AC/DC converter 601, a charging circuit 604, a battery 605, a boost circuit 603 and a DC/AC converter 602 are used to charge the battery 605 after converting the input AC power into DC power. When the power is in the city, the DC output from the battery 605 is boosted and then converted into AC and output to the AC input terminal 11 of the power supply, so that the power supply can still rely on the uninterruptible power supply system 60 when there is a power failure or power instability. However, the traditional structure needs to output power through the power supply, and sudden voltage changes or voltage instability often cause damage to the power supply. If the power supply is damaged by abnormal input power , even if the uninterruptible power system takes over the city power as the power source of the power supply when it starts to operate, the power supply cannot normally drive the load because the power supply has been damaged; therefore, the traditional structure also needs to be improved to achieve It can ensure the normal output of the power supply.

Utility model content

In view of the above-mentioned shortcomings to be improved, the primary purpose of the present invention is to provide a backup system that can maintain the working power of the load when the power is cut off, the power is abnormal, or the power supply is damaged.

The utility model is an electric power backup system, which is connected to at least one normal power supply system, and when the output power of the normal power supply system is abnormal, an action of switching the power supply system is generated to maintain power supply, wherein the electric power backup system includes:

The instantaneous power supply system includes a power conversion unit and a backup power source, and the power conversion unit is connected to the backup power source;

The power source switching unit has a voltage judgment circuit, a power switch controlled by the voltage judgment circuit, and a voltage output terminal. The power source switching unit is connected to the normal power supply system and the instantaneous power supply system at the same time. One end of the power switch is normally Connected to the normal power supply system, the voltage judging circuit obtains the output voltage of the normal power supply system through the connection of the power switch and outputs it through the voltage output terminal. After the voltage judging circuit detects that the normal power supply system outputs an abnormal voltage, a The switching signal controls one end of the power switch to switch to the instantaneous power supply system, and the instantaneous power supply system provides power to the voltage output end.

Preferably, the normal power supply system obtains alternating current and converts and outputs direct current.

Preferably, the normal power supply system is a power supply.

Preferably, the power source switching unit is embedded in the power supply.

Preferably, the power conversion unit of the instantaneous power supply system includes at least one DC/DC converter, the DC/DC converter receives DC power and converts it to output DC power to the power source switching unit.

Preferably, the backup power source of the instantaneous power supply system includes a DC/DC converter, a charging circuit, an energy storage element, a switch for receiving the switching signal to switch the connection position, and the charging circuit is connected to the DC/DC converter for DC input , and obtain direct current to charge the energy storage element, one end of the switch is normally connected to the DC/DC converter, and is triggered by the switching signal to switch to the energy storage element, and the other end of the switch is connected to the power at the back end The conversion unit, wherein the energy storage element is a battery.

Preferably, the backup power source of the instantaneous power supply system includes an AC/DC converter, a charging circuit, an energy storage element, a switch for receiving the switching signal to switch the connection position, and the charging circuit is connected to the AC/DC converter for AC input , and obtain direct current to charge the energy storage element, one end of the switch is normally connected to the AC/DC converter, and is triggered by the switching signal to switch to the energy storage element, and the other end of the switch is connected to the power at the back end The conversion unit, wherein the energy storage element is a battery.

Description of drawings

Figure 1 is a block diagram of a traditional uninterruptible power system application structure.

Fig. 2 is the block diagram of embodiment structure of the present utility model.

Fig. 3 is a block diagram of a preferred implementation structure of the present utility model.

Detailed ways

Relevant detailed description and technical content of the present utility model, now with regard to coordinating accompanying drawing, explain as follows:

Please refer to Fig. 2, which is a block diagram of the structure of an embodiment of the utility model, the utility model is a power backup system, the power backup system is at least connected to a normal power supply system, and the normal power supply system can be It is a power supply 1, the power supply 1 has an AC input terminal 11, a front rectification unit 12, a power factor correction unit 13, a transformer 14, a bandwidth control unit 15, a switching element 17 and a rear End rectification unit 16, the power backup system is composed of an instantaneous power supply system 2 and a power source switching unit 3, the power source switching unit 3 is connected to at least one power supply 1 and the instantaneous power supply system 2, the instantaneous power supply system 2 It can receive a direct current input, convert it and output it to the power source switching unit 3, and the normal selection of the power source switching unit 3 is powered by the normal power supply system, through at least one voltage output terminal at the rear end of the power source switching unit 3 31 output, and when the mains supply is abnormal or the power supply 1 is damaged and the output of the normal power supply system is abnormal, the power source switching unit 3 switches and selects the instantaneous power supply system 2 to temporarily provide power, so that the power source switching unit 3 The connected load will not lose power immediately.

Please refer to Fig. 3, which is a block diagram of a preferred implementation structure of the present utility model, the normal power supply system is a power supply 1, and the power source switching unit 3 includes a voltage judging circuit 32, a circuit controlled by the voltage The power switching switch 33 of the judging circuit 32 and the voltage output terminal 31, and the instantaneous power supply system 2 includes a backup power source 20 and a power conversion unit 21, and one end of the power switching switch 33 is normally connected to the power supply 1, and judge whether its output voltage is normal by the voltage judging circuit 32, and drive at least one load by the voltage output terminal 31 output by the conduction of the power switch 33; the backup power of the instantaneous power supply system 2 The source 20 includes an AC input terminal 11, an AC/DC converter 201, a charging circuit 202, an energy storage element 203, and a switching switch 204. The AC/DC converter 201 and the power supply 1 can be connected to the market in the same way. The alternating current provided by electricity is converted by the AC/DC converter 201 and the charging circuit 202 charges the energy storage element 203, and one end of the switching switch 204 is switched and connected between the AC/DC converter 201 and the energy storage element 203, And the other end of the switch 204 is connected to the power conversion unit 21 at the rear end, the power conversion unit 21 is a DC/DC converter 211, wherein the switch 204 is connected to the AC/DC converter 201 in normal state, the AC The power output by the /DC converter 201 is transmitted to the DC/DC converter 211 through the switch 204, and is also transmitted to the charging circuit 202 to charge the energy storage element 203, and the switch 204 is connected and controlled by the The power source switching unit 3; therefore, when the AC power provided by the commercial power is interrupted, the voltage judging circuit 32 of the power source switching unit 3 detects that the normal power supply system outputs an abnormal voltage, and then generates a switching signal Vs to control the power switching switch One end of 33 is switched to the instantaneous power supply system 2, the power switch 33 is immediately connected to the DC/DC converter 211 of the instantaneous power supply system 2, and the switching signal Vs output by the voltage judging circuit 32 simultaneously triggers the backup power source 20 The switching switch 204 of the switch is switched and connected to the energy storage element 203, and the power provided by the energy storage element 203 is supplied to the load after passing through the DC/DC converter 211 and the power source switching unit 3; if the power source switching unit 3 senses If the abnormal voltage is caused by the damage of the power supply 1, the power source switching unit 3 switches and connects the instantaneous power supply system 2, and at the same time commands the switching switch 204 to switch and connect the energy storage element 203, and the normal input AC power continues The energy storage element 203 is charged through the AC/DC converter 201 and the charging circuit 202 , so that the instantaneous power supply system 2 can temporarily provide power to the voltage output terminal 31 to maintain load operation.

The backup power source 20 of the instantaneous power supply system 2 can also change the AC/DC converter 201 into a DC/DC converter to receive a DC power instead; the power source switching unit 3 can be further embedded in the power supply 1, and make the power supply 1 have a connection end for the instantaneous power supply system 2 to connect to the power source switching unit 3, and the energy storage element 203 is a battery.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. In the above embodiments, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (9)

1. an electric power standby system is connected with at least one normality electric power system, and the action that produces the switching electric power system when described normality electric power system output power is unusual is characterized in that to keep power supply described electric power standby system comprises:

Instantaneous electric power system (2) comprises power conversion unit (21) and redundant power source (20), and described power conversion unit (21) connects described redundant power source (20);

Power source switch unit (3), have voltage and judge loop (32), be controlled by described voltage and judge the power change-over switch (33) and the voltage output end (31) in loop (32), described power source switch unit (3) connects described normality electric power system and described instantaneous electric power system (2) simultaneously, one end normality of described power change-over switch (33) is connected in described normality electric power system, described voltage judgement loop (32) is obtained the output voltage of described normality electric power system by the described power change-over switch of connection (33) and is exported via described voltage output end (31), after described voltage judges that described normality electric power system output abnormality voltage is detected in loop (32), then produce switching signal and control an end of described power change-over switch (33) and switch to described instantaneous electric power system (2), provide electrical power to described voltage output end (31) by described instantaneous electric power system (2).

2. electric power standby system according to claim 1 is characterized in that, the normality electric power system obtains alternating current and changes output DC.

3. electric power standby system according to claim 2 is characterized in that, described normality electric power system is power supply unit (1).

4. electric power standby system according to claim 3 is characterized in that, described power source switch unit (3) is embedded in the described power supply unit (1).

5. electric power standby system according to claim 1, it is characterized in that, the power conversion unit (21) of described instantaneous electric power system (2) comprises a DC-DC converter (211) at least, and described DC-DC converter (211) receives direct current output DC described power source switch unit (3) extremely through changing after.

6. electric power standby system according to claim 1, it is characterized in that, the redundant power source (20) of described instantaneous electric power system (2) comprises DC-DC converter, charge circuit (202), energy-storage travelling wave tube (203), receive described switching signal and switch the diverter switch (204) of link position, described charge circuit (202) connects the DC-DC converter of direct current input, and obtain direct current described energy-storage travelling wave tube (203) is charged, one end normality of described diverter switch (204) is connected in described DC-DC converter, switch to described energy-storage travelling wave tube (203) and triggered by described switching signal, the other end of described diverter switch (204) is connected in the power conversion unit (21) of rear end.

7. electric power standby system according to claim 6 is characterized in that, described energy-storage travelling wave tube (203) is a battery.

8. electric power standby system according to claim 1, it is characterized in that, the redundant power source (20) of described instantaneous electric power system (2) comprises AC/DC converter (201), charge circuit (202), energy-storage travelling wave tube (203), receive described switching signal and switch the diverter switch (204) of link position, described charge circuit (202) connects the AC/DC converter (201) of alternating current input, and obtain direct current described energy-storage travelling wave tube (203) is charged, one end normality of described diverter switch (204) is connected in described AC/DC converter (201), switch to described energy-storage travelling wave tube (203) and triggered by described switching signal, the other end of described diverter switch (204) is connected in the power conversion unit (21) of rear end.

9. electric power standby system according to claim 8 is characterized in that, described energy-storage travelling wave tube (203) is a battery.

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