CN201113550Y - Power supply system with backup power - Google Patents

Abstract

The utility model relates to a power supply system with backup power, which is a power supply system for converting output power, and in order to solve the problem that the conventional backup power system can not maintain output independently when power is cut off, the utility model comprises at least one power conversion device, a backup power module for outputting backup power and a power distribution unit, wherein the backup power module at least comprises an energy storage module, the power conversion device obtains the input power to generate a converted power, and the power conversion device and the backup power module are connected to the power distribution unit, wherein the first terminal of the power distribution unit is connected to the power output terminal and the second terminal receives the output of the power conversion device and the backup power module, and the output of the power conversion device and the backup power module is distributed to generate output power, so that the backup power is still maintained for a buffer time when the power conversion device is powered off or fails.

Description

Power System with Redundant Power

technical field

The utility model relates to a backup power supply system, in particular to a power output circuit with backup power.

Background technique

When the computer equipment is in operation, if the power supply source is unstable, it will cause the system to shut down abnormally or the data to be damaged, and in serious cases, it will damage the body and cause inestimable losses. To avoid this situation, computer equipment can use most A power supply unit forms a redundant power supply system (Redundant Power Supply), which includes more than two power supply subsystems, and simultaneously receives an input power to provide an output voltage to drive at least one load, and when one of them When a subsystem fails and the output is abnormal, other subsystems can share the power required by all loads, and the failed subsystem can be replaced, or the remaining subsystem can temporarily increase the output to provide the buffer time for the normal storage and shutdown of the load; and The architecture of a conventional redundant power supply system is shown in FIG. 1. The redundant power supply system is composed of two power conversion devices 2 (the basic structure of a common power supply shown in the figure) respectively forming a subsystem A and a subsystem Composed of system B, the subsystem A and subsystem B are both connected to a power input source 11 to obtain AC power, after passing through a front-end rectification unit 21 and a power factor correction unit 22, at least one switching element is controlled by a bandwidth control unit 23 24 adjusts the conversion power of a transformer 25, and outputs and drives at least one load 6 through a back-end rectification unit 26, and the end of the subsystem A and subsystem B is controlled by an output adjustment unit or a load distribution unit for each subsystem The output ratio of the above-mentioned known backup power supply system is to receive the input power from the same source, so when a power failure occurs, most subsystems of the backup power supply system also lose the power source and stop output at the same time. In order to solve the above-mentioned backup power supply The backup power system cannot provide the lack of buffer time to protect the load when the power is cut off, so the backup power system can cooperate with an uninterruptible power system 3 (as shown in Figure 2), and the known uninterruptible power system 3 is connected to the backup At the front end of the backup power system, the uninterruptible power system 3 is also connected to the city power, and one or more power conversion devices 2 are provided through the uninterruptible power system 3 in sequence. When the city power cannot be obtained, the DC power output by the battery After boosting, it is converted to AC output as the power input source 11 of the power supply, so that the power supply can still operate for a period of time relying on the power provided by the uninterruptible power system 3 when there is a power failure or power instability; however, conventional The structure of the power supply needs to output power through the power supply, and the sudden voltage change or voltage instability often causes damage to the power supply. If the power supply is damaged by abnormal input power, even if the uninterruptible power supply system 3 starts The operation replaces the mains as the power source of the power supply, and the power supply cannot normally drive the load 6 because the power supply has been damaged; therefore, the above-mentioned conventional structure also needs to be improved, so as to ensure the output of the power supply when the power is abnormal normal purpose.

In view of the defects of the above-mentioned existing redundant power supply system, the designer, based on his rich practical experience and professional knowledge in the design and manufacture of such products for many years, and with the application of academic theory, actively researched and innovated, in order to create a new type of The power system with redundant power can improve the general existing redundant power system to make it more practical. Through continuous research, design, and after repeated trial samples and improvements, the utility model with practical value is finally created.

Contents of the invention

The purpose of this utility model is to provide a power supply system with backup power, which can maintain output when the city power supply is cut off or the power supply is damaged, so as to improve the above-mentioned conventional backup power system and the backup power supply system. The assistance system is matched with the absence of the conventional uninterruptible power system.

The purpose of this utility model and the solution to its technical problems are achieved by adopting the following technical solutions. According to the utility model, a power supply system with redundant power is proposed, which is a power supply system that is electrically connected to an external power input source to convert the input power into output power and drives at least one load from at least one power output terminal. The power supply system includes There is: at least one power conversion device, which is connected to the power input source to receive the input power to generate a converted power;

At least one backup power module is connected to the power input source in parallel with respect to the power conversion device, and the backup power module includes at least one energy storage module that is normally charged by the input power to store electric energy to generate a backup power ; At least one power distribution unit is connected to the power conversion device and the backup power module and is used to determine whether the output power is the converted power or backup power to the power output terminal.

The purpose of this utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned power supply system with redundant power, the power supply system is a single power supply, the power conversion device is a transformer of the power supply, and the energy storage module is more than one battery.

The aforementioned power system with redundant power, wherein the power system includes multiple power supplies and at least one power integration backplane, and the power conversion device is at least one power supply, and the energy storage module is equipped with Set on the power integration backplane.

In the aforementioned power supply system with redundant power, the power distribution unit is a power distribution unit that detects the power used by the load and determines the output power ratio of the power conversion device and the backup power module.

In the aforementioned power supply system with redundant power, the power distribution unit is a switching conduction circuit at least having a first loop that conducts the power conversion device and a second loop that conducts the backup power module.

The aforementioned power supply system with backup power, wherein the switching conduction loop includes a power switch and a voltage judgment circuit, the first end of the power switch is connected to the power output end, the second end of the power switch The terminal is normally connected to the power conversion device to form a first circuit for outputting the converted power through the power output terminal, and the voltage judging circuit generates a switching signal representing the abnormal output voltage of the power conversion device to control the first circuit of the power switch The two terminals are switched and connected to the backup power module to form a second loop for the backup power to be output through the power output terminal.

The aforementioned power supply system with redundant power, wherein the redundant power module includes an AC/DC converter that obtains an input power from the power input source and converts the output DC power, an energy storage module, an The charging circuit for charging the energy storage module with the direct current power, a switching switch that is triggered by the switching signal and switching between the AC/DC converter and the energy storage module, and a switching switch that is turned on The power conversion is a conversion unit that outputs the backup power to the power distribution unit.

In the aforementioned power supply system with backup power, the conversion unit is a DC/DC converter.

The aforementioned power supply system with redundant power, wherein the redundant power module includes a DC/DC converter that obtains an input power from the power input source and converts the output DC power, an energy storage module, an The charging circuit for charging the energy storage module with the direct current power, a switching switch that is triggered by the switching signal and switching between the DC/DC converter and the energy storage module, and a switching switch that is turned on The power conversion is a conversion unit that outputs the backup power to the power distribution unit.

In the aforementioned power supply system with backup power, the conversion unit is a DC/DC converter.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. It can be seen from the above that in order to achieve the above purpose, the utility model provides a power supply system with redundant power, including one or more power conversion devices, at least one redundant power module that outputs a redundant power, and has a A power distribution unit, the power conversion device obtains the input power to generate a converted power, and the power conversion device is connected to the power distribution unit, the backup power module and the power conversion device are connected in parallel to the power distribution unit, the backup The power module includes at least one energy storage module, wherein one end of the power distribution unit is connected to the power output end, and the other end is normally connected to the power conversion device so that the converted power is output through the power output end, thereby integrating the power The power of the conversion device and the backup power module is used to generate an output power to drive at least one load, and when the output voltage of the power conversion device is abnormal, the backup power module can maintain power supply, and the backup power is distributed through power distribution Unit output; through the above-mentioned circuit structure, the power conversion device and the backup power module are used as power sources to ensure that the output power driving the load can still have backup power to maintain a Buffer time for graceful shutdown.

The above description is only an overview of the technical solutions of the present utility model. In order to better understand the technical means of the present utility model, it can be implemented according to the contents of the description, and in order to make the above-mentioned and other purposes, features and advantages of the present utility model better It is obvious and easy to understand. The preferred embodiments are specifically cited below, together with the accompanying drawings, and detailed descriptions are as follows.

Description of drawings

FIG. 1 is a circuit diagram of a conventional redundant power supply system.

FIG. 2 is a circuit diagram of a conventional uninterruptible power system and a redundant power supply system.

Fig. 3 is a circuit structure diagram (1) of the present utility model.

FIG. 4 is a schematic diagram of an implementation circuit of the present invention.

FIG. 5 is another implementation circuit structure diagram (2) of the present invention.

FIG. 6 is a schematic diagram of the embodiment of FIG. 5 .

FIG. 7 is a schematic diagram of another embodiment of FIG. 5 .

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the intended purpose of the invention, the specific implementation and structure of the power supply system with backup power proposed according to the utility model will be described below in conjunction with the accompanying drawings and preferred embodiments. , features and their effects are described in detail below.

Please refer to FIG. 3 , the utility model is a power supply system with redundant power, wherein the redundant system includes at least one power conversion device 2, a redundant power module 4 that outputs a redundant power, and a power distribution unit 5, wherein the power conversion device 2 can be a power supply (the basic structure of a power supply is shown in Figure 3, Figure 4 and Figure 5), as shown in the structure in Figure 3, this has a backup The power supply system of electric power is electrically connected to an external power input source 11 and a power output terminal 12 (shown in FIG. 6 and FIG. 7 ), and an input power is obtained from the power input source 11 to be input to the power conversion device 2 and the backup power Module 4, the power conversion device 2 obtains the input power and then generates a converted power output to the power distribution unit 5, the backup power module 4 is connected to the power input source 11 in parallel with the power conversion device 2, the backup The power module 4 includes at least one energy storage module 41 that is normally charged by the input power to store electric energy to generate a backup power; one end of the power distribution unit 5 is connected to the power conversion device 2 and the backup power module 4 and is used to determine that the output power is the converted power or backup power to the power output terminal 12 (shown in Figures 6 and 7) to drive at least one load 6; under normal working conditions, the power distribution unit 5 can be a The power distribution unit 53 (shown in FIG. 4 ) that detects the power used by the load to determine the output power ratio of the power conversion device 2 and the backup power module 4, detects the output power of the load 6 and adjusts each The output power of the power conversion device 2 and the backup power module 4, or the power distribution unit 5 is at least equipped with a first circuit that conducts the power conversion device 2 and a second circuit that conducts the backup power module 4 The switchable conduction loop is switched between the power conversion device 2 and the backup power module 4 to select an appropriate output device.

Please refer to FIG. 4, an implementation of the power distribution unit 5 can be a power distribution unit 53, and the power distribution unit 53 can simultaneously receive the converted power output by the power conversion device 2 and the output power of the backup power module 4. Backup power and generate an output power, and the power distribution unit 53 can distribute the power conversion device 2 by detecting the power for driving the load 6 and the output power of the power conversion device 2 and the backup power module 4 The size of the output power of the backup power module 4, its power distribution technology and theory are well known to those skilled in the art, so it will not be described in detail; the utility model can achieve power distribution by means of the above-mentioned structure function, and can temporarily maintain normal output when one of the output systems fails.

Please refer to FIG. 5, which shows another embodiment structure of the backup power module 4 and the power distribution unit 5, wherein the backup power module 4 includes at least one energy storage module 41, and further includes an AC/DC converter 42, a charging circuit 43, a switch 44 and a conversion unit, wherein the conversion unit can be a DC/DC converter 45, the AC/DC converter 42 obtains a power input source 11 Input power, and output DC power to the switch 44 and the charging circuit 43 at the same time, the charging circuit 43 obtains DC power to charge the energy storage module 41, and the first end of the switch 44 is normally connected to the AC/DC The converter 42 is converted into backup power by the AC/DC converter 42 and sent to the switch 44, and the switch 44 is switched and connected to the energy storage module 41 after being triggered by a switch signal generated by the power distribution unit 5 , the backup power is output by the energy storage module 41, the second end of the switch 44 is connected to the conversion unit, and the conversion unit receives the backup power turned on by the switch 44 and outputs it to the power distribution unit 5; the switching conduction loop of the power distribution unit 5 is composed of a power switch 51 and a voltage judgment circuit 52, wherein the first end of the power switch 51 is connected to the power output terminal 12 (shown in FIG. 6 and 7), and the second end can switch the connection position between the rear rectification unit 26 of the power conversion device 2 and the conversion unit of the backup power module 4, and the second end of the power switch 51 is normally connected to The rear rectifying unit 26 forms a first loop for the converted power to be output through the power output terminal 12 (shown in FIGS. The output terminal 12 (shown in FIG. 6 and FIG. 7 ) outputs, and after the power switch 51 is triggered by a switching signal Vs, the second end of the power switch 51 is switched and connected to the conversion unit of the backup power module 4 to form The second circuit for outputting the backup power through the power output terminal 12 (shown in FIGS. 6 and 7 ), the backup power generated by the backup power module 4 passes through the power switch 51 and the power output terminal 12 (shown in Figure 6 and Figure 7) output; and the switching signal Vs is generated by the voltage judging circuit 52 of the power distribution unit 5, the voltage judging circuit 52 is to set a working voltage reference value, and detect the input The voltage of the power switching switch 51, and when the voltage input to the power switching switch 51 is lower than the working voltage reference value, a switching signal Vs is generated, so when the back-end rectifying unit 26 normally connected to the second end of the power switching switch 51 When the output is lower than the reference value of the working voltage, the voltage judging circuit 52 generates a switch signal Vs and sends it to the power switch 51, so that the second end of the power switch 51 is switched to connect to the backup power module 4. The conversion unit, the backup power provided by the backup power module 4 maintains the work of the load 6; the above-mentioned judgment mechanism of the voltage judgment circuit 52 can use a certain voltage source to set the reference value of the working voltage, and at least one comparator Comparing the converted power and backup power with the operating voltage reference value, judging whether the converted power and backup power are higher than the operating voltage reference value, and generating the switch when one of them is lower than the operating voltage reference value Signal Vs, the above-mentioned comparison circuit is a well-known technology in this technical field, so it will not be described in detail. In addition, the voltage judging circuit 52 can also set a voltage difference reference value, and obtain the converted power and backup power The voltage difference between the two, the voltage drop of one of the two is lower than the other voltage to form a voltage difference, when the voltage difference is greater than the reference value of the voltage difference, the switching signal Vs is generated, this technology is also common in this technical field Common sense people are familiar with it, so I won't repeat it here.

Please refer to Figure 6, Figure 6 is a schematic diagram of an embodiment of the present invention, the power supply system of the present invention can be a single power supply, and the power supply is connected to at least one power input source 11 and connected to the power output terminal 12 At least one load 6 (not shown in this figure), the power supply includes various electronic components and a power conversion device 2a to convert input power, wherein the power conversion device 2a can be a transformer, and the backup power module 4 It can also be laid out in the circuit of the power supply, and has at least one energy storage module 41 in the circuit, wherein the energy storage module 41 is more than one battery; another embodiment of the present utility model Please refer to FIG. 7, the power supply system of the present utility model may include at least one power conversion device 2b connected in parallel to a power integration backplane 7, wherein the power conversion device 2b is a power supply, and the power distribution unit 5 can be laid out (layout) On a power integration backplane 7, the backup power module 4 can also be laid out on the power integration backplane 7, and the energy storage module 41 is connected to the power integration backplane 7; as mentioned above The implementation circuit architecture and implementation style can improve the deficiency of the conventional redundant power supply system (Redundant Power Supply) and provide safer power-off protection measures.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention, wherein the AC/DC converter 42 of the backup power module in the above embodiment can also be replaced by a DC/DC converter , to be compatible with DC power input, any skilled person who is familiar with this profession can use the technical content disclosed above to make some changes or modify it into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the present utility model However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims (10)

1. A power supply system with redundant power, which is a power supply system that is electrically connected to an external power input source (11) to convert the input power into output power and drives at least one load (6) by at least one power output terminal (12) , characterized in that the power system includes: At least one power conversion device (2) is connected to the power input source (11) to receive the input power to generate a converted power; At least one backup power module (4) is connected to the power input source (11) in parallel with respect to the power conversion device (2). An energy storage module (41) for generating a backup electric power from electric energy; At least one power distribution unit (5) is connected to the power conversion device (2) and the backup power module (4) and is used to determine whether the output power is the converted power or backup power to the power output terminal (12) . 2. The power supply system with redundant power according to claim 1, characterized in that the power supply system is a single power supply, and the power conversion device (2a) is a transformer of the power supply, the energy storage The module (41) is more than one battery. 3. The power supply system with redundant power according to claim 1, characterized in that the power supply system includes multiple power supplies and at least one power integration backplane (7), and the power conversion device (2b) It is at least one power supply, and the energy storage module (41) is installed on the power integration backplane (7). 4. The power supply system with backup power according to claim 1, characterized in that said power distribution unit (5) uses power for a detected load (6) to determine the power conversion device (2) and the backup power A power distribution unit (53) that assists the output power ratio of the power module (4). 5. The power supply system with redundant power according to claim 1, characterized in that said power distribution unit (5) is at least equipped with a first circuit that conducts the power conversion device (2) and conducts the The switching conduction loop of the second loop of the backup power module (4). 6. The power supply system with redundant power according to claim 5, characterized in that said switching conduction loop includes a power switch (51) and a voltage judgment circuit (52), the power switch (51 ) is connected to the power output terminal (12), and the second terminal of the power switch (51) is normally connected to the power conversion device (2) to form the converted power output through the power output terminal (12) The first loop, and the voltage judging loop (52) generates a switching signal representing the abnormal output voltage of the power conversion device (2) to control the second end of the power switching switch (51) to switch and connect to the backup power module (4) Forming a second circuit for outputting the backup power through the power output terminal (12). 7. The power supply system with redundant power according to claim 6, characterized in that said redundant power module (4) includes an input power obtained from the power input source (11) and converted to output DC power AC/DC converter (42), an energy storage module (41), a charging circuit (43) that obtains the DC power to charge the energy storage module (41), and a switching connection triggered by the switching signal A switch (44) between the AC/DC converter (42) and the energy storage module (41), and a switch (44) turned on power is converted into the backup power output to the power Conversion unit for allocation unit (5). 8. The power supply system with redundant power according to claim 7, characterized in that said converting unit is a DC/DC converter (45). 9. The power supply system with redundant power according to claim 6, characterized in that said redundant power module (4) includes an input power obtained from the power input source (11) and converted to output DC power A DC/DC converter, an energy storage module (41), a charging circuit (43) that obtains the DC power to charge the energy storage module (41), and a switch connected to the DC when triggered by the switching signal A switch (44) between the /DC converter and the energy storage module (41), and a switch (44) that converts the power turned on by the switch (44) into the backup power output to the power distribution unit (5) conversion unit. 10. The power supply system with redundant power according to claim 9, characterized in that said converting unit is a DC/DC converter (45).

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