TWI591472B - Universal power supply system - Google Patents

Description

Universal power supply system

The invention relates to a power supply system, in particular to a power supply system for an industrial computer or a server.

Generally, industrial computers or servers must operate for a long time, so high-power power supply systems or power supply systems with backup power supplies are required, and because the power requirements of industrial computers or servers produced by various computer factories are different. Therefore, a general power supply system manufacturer provides a modular power supply system 50 in response to an order of different power supply power requirements. Referring to FIG. 9 and FIG. 10, it includes: a casing 51, which includes two The backplane module 52 is fixed to the side of the casing 51 and includes a plurality of DC power sources and communication ports 521 and a monitoring circuit 522. Each of the DC power sources and communication modules 521 includes a power source. The input and output ports 521a and a communication port 521b are electrically connected to the communication port 521b. The monitoring circuit includes a plurality of enable control terminals S _EN1 and S _EN2 and a plurality of current detecting terminals I _S1 and I _{S2 .} And setting a complex current threshold value and an over power threshold; the plurality of AC/DC power supply 53 is inserted into the casing 51 from the other side of the casing 51, and The DC power output terminals DC/OUT1 and DC/OUT2 of the AC/DC power supply 53 are connected to the DC power input/output port 521a of the corresponding DC power source and communication port 521, and are connected to the port by the communication port (IIC1, IIC2). The monitoring circuit 522 of the backplane module 51 and the plurality of DC power module boards 54 are inserted into the casing 51 from the other side of the casing 51, wherein each DC power module board 54 includes a corresponding The DC power supply of the backplane module 52 and the terminal 埠 of the communication 埠521 are obtained to obtain the DC power output from the AC/DC power supply 53 and output to a DC power supply of a specific voltage level, and then output, and the EN and current output are enabled. The terminal I _{SENSE is} respectively connected to the communication port 521b of the DC power source and communication port 521, so that the current output current of the DC power source module 54 is compared with the preset current threshold value by the monitoring circuit 522, and if it is greater than the current threshold value, The DC power supply module 54 that _{enables the} control terminal to control the over-current of S _EN1 and S _{EN2 is} no longer enabled to avoid over-current burnout.

The modular power supply system 50 is mainly configured to install an AC/DC power supply 53 having the same wattage or different wattages in a casing 51, and the backplane module 52 can be used with a DC power supply according to requirements. The module board 54 outputs the DC power source converted by the AC/DC power supply unit 53 via the DC power supply module 54 in series or in parallel, or the DC power supply of one of the DC power supply module boards 54 is used as the backup power source. use. Moreover, the monitoring circuit 522 of the backplane module 52 monitors whether the output current of the plurality of DC power module boards 54 is overcurrent compared to the current threshold, and if so, the DC power module board 54 that controls the overcurrent is no longer Enable, provide over-current protection (OCP). Furthermore, since the backplane module further provides over-power protection (OPP), that is, the monitoring circuit is in the parallel output mode, if the modular power supply system 50 provides 500W of DC power, The power of two AC and DC power supplies is 500W, and each AC/DC power supply output is 250W. At this time, the monitoring circuit sets 500W as the power to monitor whether the power is over-powered. The threshold value, once one of the AC and DC power supplies is damaged, is directly supplied by another 500W, so the power threshold of the backplane module can be fixed when two power supplies of the same wattage are used.

Due to the standardization of the design, the above modular power supply system 50 or the different wattage modular power supply system 50 may be used, and different wattage AC/DC power supplies may be used, and the AC/DC power supply may be fixed. In the case. Therefore, when the modular power supply system 50 is repaired, one of the 500W AC/DC power supplies is mistakenly replaced with an 875W AC/DC power supply. At this time, the backplane module detects two AC/DC power supplies. When the power supplies (500W, 875W) are different, they will not enter the parallel share mode (current share), and one of them will be the main power supply (Master) and the other will be the standby power supply (slave). The main power supply is powered by the other, and the other is not powered. If the 875W is selected as the main power supply, the power threshold of the backplane module is still 500W, which causes over-power loss.

Therefore, in terms of power supply manufacturers, the power supply and DC power supply module boards used in the modular power supply system have been commercialized, and it is not necessary to redesign the circuit or the circuit board as long as it responds to different power supply requirements or power output. The form can be customized to the backplane module.

However, current power supply manufacturers have difficulty in clearly identifying power supply or DC power supply specifications due to the use of a commercial power supply and a DC power supply module board, resulting in errors in assembling the modular power supply system. For example, the DC power module board is plugged into the wrong DC power supply on the backplane module; in addition, the modular power supply system still has to customize the backplane module, resulting in an inefficient improvement in production efficiency; So, so The modular architecture of the grouped power supply system still needs to be improved.

In view of the technical defects of the above existing power supply system, the main object of the present invention is to provide a universal power supply system and a universal backplane module thereof.

The main technical means used to achieve the above purpose is that the universal power supply system includes: a casing; a backplane module is fixed to the casing, and includes a plurality of DC power sources and communication ports and a monitoring device. a circuit; wherein the monitoring circuit is electrically connected to the plurality of DC power sources and communication ports, and includes a plurality of enabling control terminals, a plurality of current detecting terminals, and a plurality of specification identification terminals, and a specification comparison table is built therein, wherein the specification comparison table is The utility model comprises a plurality of DC power supply module board models and corresponding current threshold values; a plurality of AC/DC power supply units are fixed in the casing, wherein the DC output terminals of the AC/DC power supply are connected to the corresponding DC power supply The power supply and output port of the communication port; and the plurality of DC power supply module boards are fixed in the casing, and are respectively inserted into the DC power supply and communication port of the backplane module, and each DC power supply module board includes There is a specification setting circuit and a specification identification signal end, and the specification identification signal end is electrically connected to the specification identification end of the monitoring circuit, and the monitoring circuit reads each DC The specification signal of the source module board is compared with the specification table of the DC power module board and its corresponding current threshold value, and the enabling end of the DC power module board is electrically connected to the corresponding corresponding to the monitoring circuit. Enable the control terminal, again Its current output terminal is connected to a current detecting end corresponding to the monitoring circuit.

It can be seen from the above that the DC power module board with the same external dimensions further includes a specification setting circuit. When the backplane module is plugged into the module, the specification identification signal end outputs an identification signal to the backplane module. The monitoring circuit of the group; since the monitoring circuit has a specification comparison table built therein, the identification signal transmitted from each DC power supply module board inserted thereon can be inserted into the comparison specification table. The model specifications of each DC power module board, the monitoring circuit automatically sets the current threshold value of each DC power module board as the monitoring point of the overcurrent protection; thus, when all the DC power module boards are inserted into the backplane After the corresponding DC power output of the module is input, the backplane module can automatically detect the current specifications of all DC power module boards, and automatically monitor whether each DC power module board exceeds its corresponding current threshold value, without Different backplane modules are specially designed using different DC power module boards.

The present invention further provides a general-purpose power supply system, comprising: a casing; a backplane module fixed in the casing, comprising a plurality of DC power sources and communication ports and a monitoring circuit; The monitoring circuit is electrically connected to the plurality of DC power sources and communication ports, and includes a plurality of specification identification ends, and has a specification comparison table built therein. The specification comparison table includes a plurality of AC/DC power supply specifications and corresponding power thresholds. The plurality of AC/DC power supplies are fixed in the casing, wherein the DC output terminals of the AC/DC power supplies are connected to the power input and output ports of the corresponding DC power supply and communication ports, and the AC and DC power supplies are provided. The system includes a specification setting circuit and a specification identification signal end for electrically connecting to the corresponding specification detection end of the monitoring circuit; The plurality of DC power module boards are fixed in the casing, and each DC power module board is inserted into the corresponding DC power supply and communication port of the backboard module.

It can be seen from the above that the present invention is to provide an AC/DC power supply with the same external dimensions with a specification setting circuit. When a plurality of AC/DC power supply devices are connected to the backplane module, the monitoring circuit detects that the power supply is currently being supplied. The AC/DC power supply, so the monitoring circuit reads the identification circuit of the AC/DC power supply responsible for supplying the power supply, and outputs the identification signal to determine the model specification, and the monitoring circuit sets the AC power supply for supplying the power supply. The power threshold is used as a monitoring point for over-power protection; thus, when all AC/DC power supplies are connected to the backplane module, the backplane module can automatically detect the AC/DC power supply currently responsible for supplying power. Model specifications, and automatically set the power threshold for power protection, without having to design different backplane modules for different DC power supplies.

Referring to FIG. 1 and FIG. 2, a first preferred embodiment of the universal power supply system 10 of the present invention includes: a casing 11 including two opposite side openings; The group 12 is fixed to the side of the casing 11 and includes at least a DC power supply and communication port 121 and a monitoring circuit 122. The monitoring circuit 122 is electrically connected to the at least DC power supply and communication port 121. Each DC power supply and communication unit 121 includes a power input/output port 121a and a communication port 121b. The communication system includes at least a uniform energy control terminal S _EN1 , S _EN2 , at least one current detecting terminal I _S1 , I _S2 and at least one The specification identifies the terminals V _ID1 and V _ID2 and has a specification comparison table. In the embodiment, the specification comparison table includes the model specifications and corresponding voltage values and corresponding current thresholds; the plurality of AC and DC power supplies The device 13 is inserted into the casing 11 from the other side of the casing 11, wherein the DC output terminals DC/OUT1 and DC/OUT2 of the AC/DC power supply 13 are connected to the corresponding DC power supply and communication port. 121 power output 埠121a And at least the power supply module board 14 is inserted into the casing 11 from the other side of the casing 14 and is respectively inserted into the DC power supply and communication port 121 of the backboard module 12, and each The DC power module board 14 includes a specification setting circuit 143 and a specification identification signal terminal V ₁ , V ₂ . The specification identification signal terminals V ₁ and V ₂ are electrically connected to the specification identification terminal V _{ID1 of} the monitoring circuit 122, V _ID2 , and the enabling terminals DD1_EN, DD2_EN of the DC power module board 14 are electrically connected to the enabling control terminals S _EN1 , S _EN2 corresponding to the monitoring circuit 122 , and the current output terminals DD1_Ise1 , DD2_Ise2 are connected thereto The current detecting terminal corresponding to the monitoring circuit 122. Moreover, as shown in FIG. 4, each DC power supply module board 14 includes a controller 141, a DC power output terminal DD1_Vout, and a current output circuit; wherein the output current circuit includes a current detector (resistor R _S ) and a differential amplifier 142, the two input terminals of the differential amplifier 142 are connected to the two ends of the current detector R _S , and the current detector R _S is serially connected between the DC voltage output terminal DD1_Vout and the DC power output 埠 DD1 In order to detect the current output current DD1_Ise1 of the DC power module board.

In addition, referring to FIG. 3, it is a second preferred embodiment of the universal power supply system 10 of the present invention, which is substantially the same as the first preferred embodiment, but each AC/DC power supply 13 also includes There is a specification setting circuit and a specification identification signal terminal V ₃ , V ₄ , and the monitoring circuit 122 further includes a plurality of specification identification terminals V _ID3 and V _ID4 to identify the model specifications of each AC/DC power supply 13 and The built-in specification comparison table reads its corresponding power threshold value by model specification. In addition, the monitoring circuit may separately include a plurality of standard identification terminals V _ID3 and V _ID4 , and only determine the model specifications of the AC/DC power supply 13 without separately setting the current threshold value of each DC power module board 14 . The specification identifies the terminals V _ID1 and V _ID2 . However, the monitoring circuit 122 has an AC/DC power supply that detects the current output of the complex AC/DC power supply, and uses the power critical point corresponding to the specification model of the AC/DC power supply currently being output as the monitoring point.

Referring to FIG. 4, it is an illustration of the first preferred embodiment of the present invention, that is, the monitoring circuit 122 is only connected to the DC power module board 14, wherein the specification setting circuit 143 of the DC power module board 14 is For a voltage dividing circuit R1, R2, the voltage dividing circuit 143 is connected to a reference voltage Vref, and the serial connection node V1 is connected to the specification identification terminal V _{ID1 of} the monitoring circuit 122. In this example, the lower resistor R2 of the voltage dividing circuit can be externally connected, that is, one end of the upper resistor R1 is connected to the reference voltage Vref, and the other end is connected to the specification identification signal terminal V1, and the specification identifying the signal terminal V1 is further An external lower resistor R2 is connected at one end, and the other end of the lower resistor R2 is grounded. Since the resistance values of the upper and lower resistors R1 and R2 are fixed, the monitoring circuit 122 can identify the voltage of the terminal V _ID1 according to the specification, compare the voltage of the specification comparison table, and compare the model with the corresponding current according to the model. The threshold is set and the current threshold is set to the current threshold of the DC power module board 14.

Please refer to FIG. 5, which is another illustration of the first preferred embodiment of the present invention, which adds another DC power module board 14 than the above description. In this example, the specification setting circuit 143 of the two DC power supply module boards 14 are all voltage dividing circuits R1/R2 and R3/R2, and the reference voltages Vref connected to the two voltage dividing circuits are the same; The monitoring circuit 122' can make the resistance values of the upper resistors R1 and R3 selected by the two-component voltage circuits R1/R2 and R3/R2 different, so the monitoring circuit 122' can identify the terminals V _ID1 and V _ID2 at the second specification. Read different voltages, and then compare the voltages of the specification comparison table respectively. If any of them meets, further read the current threshold value of the corresponding model, and set the current threshold value of each DC power module board 14; Therefore, the current threshold value of each DC power module board 14 can be automatically set as a monitoring point of the overcurrent protection.

Similarly, the above description can also be applied to the second preferred embodiment of the present invention; wherein the monitoring circuit 122' can further include a specification comparison table including an AC/DC power supply model specification and a power threshold value thereof. The specification setting circuit of each AC/DC power supply 13 is also a voltage dividing circuit. By setting the same reference voltage and selecting the upper resistance of different resistance values, the specifications of each AC power supply can be obtained, and then compared with the specification. The table obtains the current model specifications of the AC power supply, and then reads its corresponding power threshold according to the model specifications to set the monitoring point for the over-power protection function.

In order for the monitoring circuit 122' to identify the DC power module board specification by the voltage level of the specification identification end, thereby setting a suitable current threshold value, as shown in FIG. 6, the plurality of specification identification circuits 143 can use the same divided piezoelectricity. Road, but the connected reference voltages Vref1, Vref2 are not the same.

Referring to FIG. 7 , it is a further example of the first preferred embodiment of the present invention. Each specification setting circuit 143 ′ includes a plurality of voltage dividing circuits, and each voltage dividing circuit is connected to different high and low references. The voltages Vref1 and Vref2 output voltage signals of different height and low levels to the monitoring circuit 122', and the specification circuit of the monitoring circuit 122' corresponding to each specification setting circuit 143' also includes a plurality of specifications. Identifying the sub-terminals V _ID11 , V _ID12 , V _ID21 , and V _ID22 to respectively connect to the series node of the corresponding voltage dividing circuit, and smoothly read the high and low voltage signals of each specification setting circuit 143 ′; in this example, each The specification setting circuit 143' includes a two-divided voltage circuit. If Vref1>Vref2, the two-standard identification sub-terminals V _ID11 and V _{ID12 of} the monitoring circuit read from the first specification setting circuit 143', and the _zero- voltage level signal is read. The other two types of identification sub-terminals V _ID21 and V _ID22 read the _0th and 1st voltage rate bit signals from the read second specification setting circuit 143'; that is, the monitoring circuit 122' can identify the voltage of the terminal according to the plurality of specifications. Level signal Identify the model of each of the DC power module board.

A further example of the first preferred embodiment of the present invention is shown in FIG. 8. The specification setting circuit 143 is integrated in the controller 141a corresponding to the DC power module board, that is, the controller 141a is connected. Up to the specification identification signal terminals V1, V2, and built-in specification data, which is transmitted to the monitoring circuit 122 by the PM BUS signal, and the monitoring circuit 122" directly obtains the specification data, and determines the current specification and model of the DC power supply module board 14. And read the current threshold in the specification table. Similarly, the specification setting circuit of each AC/DC power supply 13 is integrated in the corresponding secondary side controller, that is, the secondary side controller is connected to the specification identification signal terminals V3 and V4, and has built-in specifications. The data is transmitted to the monitoring circuit 122" by the PM BUS signal or the IIC signal, and the monitoring circuit 122" directly obtains the specification data, determines the current specification type of the AC/DC power supply, and reads the power value in the specification comparison table, and then The smallest of all power is used as the basis for monitoring the over-power.

Because the monitoring circuit can detect the AC and DC power supply currently responsible for power supply The supplier, so the power supply of the AC and DC power supply specification model, read the power threshold of the specification model against the specification comparison table, the power threshold is used as the monitoring point of the overpower protection function. In this way, when two 500W AC/DC power supplies are connected in parallel output mode, the monitoring circuit sets the corresponding power threshold as an over-power protection function (OPP) according to the specification model of one of the AC/DC power supplies. Power threshold. If two 875W, 500W AC/DC power supplies use 875W AC/DC power supply as the main power supply, the monitoring circuit reads the specification model of the 875W AC/DC power supply, and then compares the specifications. The power threshold of the 875W AC/DC power supply model is used as the monitoring point of the over-power protection function; otherwise, if the 500W AC/DC power supply is the main power supply; then the monitoring circuit reads 500W AC/DC. The specification of the power supply, and then the power threshold of the 500W AC/DC power supply model in the specification, is used as a monitoring point for the over-power protection function to protect the AC/DC power supply.

In summary, when all the DC power module boards are plugged into the corresponding DC power output of the backplane module, the backplane module can automatically detect the current specifications of all DC power module boards, and automatically according to the specifications. Set the monitoring point of the overcurrent protection function to monitor whether each DC power supply module board exceeds its corresponding current threshold value, and does not design different backplane modules due to different DC power supply module boards. In addition, when all AC/DC power supplies are connected to the backplane module, the backplane module can automatically detect the power specifications of all current DC power supplies, and automatically set the overpower protection function according to the specifications. Monitoring points to monitor whether the AC/DC power supply exceeds its corresponding current threshold without having to use different DC The power supply is specially designed with different backplane modules and has a foolproof function.

10‧‧‧Universal power supply system

11‧‧‧Shell

12‧‧‧ Backplane module

121‧‧‧DC Power Supply and Communication埠

121a‧‧‧Power input and output

121b‧‧‧Communication埠

122, 122', 122" ‧ ‧ monitoring circuit

13‧‧‧AC power supply

14‧‧‧DC power supply module board

141, 141a‧‧ ‧ controller

142‧‧‧Differential Amplifier

143, 143'‧‧‧Specification setting circuit

50‧‧‧Modular Power Supply System

51‧‧‧Chassis

52‧‧‧backplane module

521‧‧‧DC Power Supply and Communication埠

521a‧‧‧Power input and output

521b‧‧‧Communication埠

522‧‧‧Monitor circuit

53‧‧‧AC power supply

54‧‧‧DC power supply module board

1 is a perspective exploded view of a general-purpose power supply system of the present invention; and FIG. 2 is a circuit block diagram of a first preferred embodiment of the present invention.

Figure 3 is a block diagram of a circuit of a second preferred embodiment of the present invention.

Figure 4 is a detailed circuit diagram of a first preferred embodiment of the present invention.

Figure 5 is a detailed circuit diagram of the first and second preferred embodiments of the present invention.

Figure 6 is another detailed circuit diagram of the first and second preferred embodiments of the present invention.

Figure 7 is a further detailed circuit diagram of the first and second preferred embodiments of the present invention.

Figure 8 is still another detailed circuit diagram of the first and second preferred embodiments of the present invention.

Figure 9: A stereoscopic view of an existing power supply system.

Figure 10 is a block diagram of the circuit of Figure 9.

12‧‧‧ Backplane module

121‧‧‧DC Power Supply and Communication埠

121a‧‧‧Power input and output

121b‧‧‧Communication埠

122‧‧‧Monitoring circuit

13‧‧‧AC power supply

14‧‧‧DC power supply module board

143‧‧‧Specification setting circuit

Claims (22)

A universal power supply system includes: a casing; a backplane module fixed to the casing, comprising: a plurality of DC power sources and communication ports, each of the DC power sources and communication ports respectively having a power output And a monitoring circuit electrically connecting the plurality of DC power sources and communication ports, and comprising a plurality of enabling control terminals, a plurality of current detecting terminals and a plurality of specification identifying ends, and a specification comparison table is built therein, wherein the specification is compared The watch system includes a plurality of DC power supply module board models and corresponding current thresholds; a plurality of AC and DC power supplies are fixed in the casing, wherein each power supply comprises a DC output terminal, the DC output terminal Connected to the corresponding power supply and output port of the DC power supply and communication port; and the plurality of DC power supply module boards are fixed in the casing, and are respectively inserted into the DC power supply and communication port of the backplane module, and each The DC power supply module boards respectively include: a specification setting circuit; the uniform energy end is electrically connected to the enabling control end corresponding to the monitoring circuit; and a current output end Connected to the current detecting end corresponding to the monitoring circuit; and a specification identification signal end electrically connected to the specification identification end corresponding to the monitoring circuit; wherein the monitoring circuit is read by the specification identification signal end of each DC power supply module board A specification identification signal of each DC power module board, and then the specification The comparison table compares the DC power module board models and their corresponding current thresholds, and the monitoring circuit sets the corresponding current threshold value for each DC power module board as the monitoring point of the overcurrent protection. The universal power supply system according to claim 1, wherein the specification setting circuit of each of the DC power supply module boards includes a voltage dividing circuit connected to a reference voltage, and the serial connection node is connected to the monitoring circuit. The specification identifies the end. According to the universal power supply system described in claim 2, the voltage dividing circuits of the DC power module boards are the same, but the connected reference voltages are different. According to the universal power supply system described in claim 2, the reference voltages of the DC power supply module boards are the same, but the connected voltage dividing circuits are different. According to the universal power supply system of claim 4, the resistance values of the upper resistors of the voltage dividing circuits are different. The universal power supply system according to claim 1, wherein the specification setting circuit of each of the DC power supply module boards comprises a plurality of voltage dividing circuits respectively connected to different reference voltages of high and low voltage levels; and the monitoring circuit specifications The identification terminal includes a plurality of specification identification sub-terminals for respectively connecting to corresponding voltage dividing circuits of the corresponding specification setting circuits. The universal power supply system as described in any one of claims 2 to 6, wherein the plurality of DC power supply module boards of the specification comparison table built in the monitoring circuit correspond to different voltage values. The general-purpose power supply system according to claim 7, wherein the monitoring circuit is configured to read the voltage of each specification identification end, and if the voltage of the specification comparison table is satisfied, the current value of the model corresponding to the specification comparison table voltage is determined. The value is set to the current of the DC power module board connected to the identification end of the specification. Threshold value. According to the general-purpose power supply system of claim 1, the specification setting circuit of each DC power supply module board is integrated into a controller of each DC power supply module board, and a specification data is built in the controller. The device is connected to the specification identification signal terminal. The universal power supply system of claim 9, wherein the built-in specification table of the monitoring circuit includes different model data and corresponding current thresholds. The general-purpose power supply system according to claim 10, wherein the monitoring circuit reads the specification data transmitted by the identification end of each specification, and if the model specification of the specification comparison table is satisfied, the voltage of the specification comparison table corresponds to The current threshold of the model is set to the current threshold of the DC power module board to which the specification identification terminal is connected. A universal power supply system includes: a casing; a backplane module fixed in the casing, comprising: a plurality of DC power sources and communication ports, each of the DC power sources and communication ports respectively comprising a power source The input and output ports are connected to the plurality of DC power sources and communication ports, and include a plurality of specifications identification terminals, and a specification comparison table is built in, and the specification comparison table includes a plurality of AC/DC power supply specifications. The model and its corresponding power threshold; the complex AC/DC power supply is fixed in the casing, wherein each AC/DC power supply includes a DC output terminal, and the DC output terminal is connected to the corresponding DC power supply and communication埠The power output is 埠, And each AC/DC power supply system comprises: a specification setting circuit; and a specification identification signal end electrically connected to the corresponding specification detection end of the monitoring circuit; and a plurality of DC power supply module boards fixed to the casing The DC power supply module board is inserted into the corresponding DC power supply and communication port of the backplane module; wherein the monitoring circuit reads the AC/DC power supply by the specification identification signal end of each AC/DC power supply. A specification identification signal is compared with the specification comparison table for each AC/DC power supply model and its corresponding power threshold, and the power threshold value of the AC/DC power supply responsible for supplying the power supply is set as the overpower protection. Monitoring points. The universal power supply system of claim 12, wherein the specification setting circuit of each of the AC/DC power supplies includes a voltage dividing circuit connected to a reference voltage, and the serial connection node is connected to the monitoring circuit. The specification identifies the end. According to the general-purpose power supply system described in claim 13, the voltage dividing circuits of the AC/DC power supplies are the same, but the connected reference voltages are different. According to the general-purpose power supply system described in claim 13, the reference voltages of the AC/DC power supplies are the same, but the connected voltage dividing circuits are different. According to the universal power supply system of claim 15, the resistance values of the upper resistors of the voltage dividing circuits are different. The universal power supply system of claim 12, wherein the specification setting circuit of each of the AC/DC power supplies comprises a plurality of voltage dividing circuits respectively connected to reference voltages of different high and low voltage levels; and the monitoring circuit Each specification identification end includes a plurality of specification identification sub-terminals for respectively connecting to corresponding voltage dividing circuits of corresponding specification setting circuits. The universal power supply system as described in any one of claims 13 to 17, wherein the built-in specification table of the monitoring circuit includes voltage values of various model specifications. The universal power supply system according to claim 18, wherein the monitoring circuit detects the AC/DC power supply responsible for the output of the plurality of AC/DC power supplies, and reads the specification identification terminal voltage of the AC/DC power supply responsible for the output. According to the model specification of the specification comparison table, if it is satisfied, the power threshold of the model specification is set as the monitoring point of the overpower protection function. According to the universal power supply system of claim 12, the specification setting circuit of each AC/DC power supply is integrated in a secondary side controller of each AC/DC power supply, and is built in the secondary side controller. There is a specification data, and the secondary side controller is connected to the specification identification signal end. The universal power supply system of claim 20, wherein the built-in specification table of the monitoring circuit includes different model data and corresponding power thresholds. The universal power supply system according to claim 21, wherein the monitoring circuit detects an AC/DC power supply responsible for outputting in the plurality of AC/DC power supplies, and reads a specification identification terminal voltage of the AC/DC power supply responsible for the output. According to the model specification of the specification comparison table according to the read voltage ratio, if it is satisfied, the power threshold corresponding to the self-satisfying model specification is set as the monitoring point of the over-power protection function.