Power supply system, control method, and program

Abstract

To provide a power supply system that can prevent system failures in a power supply system with multiple redundant power supplies.SOLUTION: The power supply system is redundant and includes multiple power supplies. The power supply system includes control means. The control means: when at least one of the multiple power supplies stops causes operating power supplies among the multiple power supplies to change a threshold value of an overcurrent detection value flowing to the operating power supplies from a first threshold value to a second threshold value and also causes a load to suppress currents flowing through loads of the multiple power supplies; and when the stopped power supply is restored, causes the operating power supplies to change the threshold value of the overcurrent detection value from the second threshold value to the first threshold value, and also causes the load to stop suppressing currents by the load.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a power supply system, a control method, and a program. [Background technology]

[0002] Computerization is progressing in various fields. When handling computerized information, a device is needed to process the computerized information, and the device needs a power source. Patent documents 1 to 3 disclose related technologies, such as redundant power supplies and power supply systems equipped with multiple power supplies. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 05-260654 [Patent Document 2] JP 2014-048972 A [Patent Document 3] Patent Publication No. 2022-091497 Summary of the Invention [Problem to be solved by the invention]

[0004] In a power supply system having a plurality of redundant power supplies, when at least one of the plurality of power supplies stops, the power that the stopped power supply supplied to the load is compensated for by the operating power supply without stopping, and an overcurrent occurs in the operating power supply, which may result in a system failure of the power supply system. In this way, the reliability of the power supply system may decrease in the power supply system having a plurality of redundant power supplies. Therefore, a technology capable of suppressing a system failure of the power supply system having a plurality of redundant power supplies is required.

[0005] An object of each aspect of the present disclosure is to provide a power supply system, a control method, and a program that can solve the above-mentioned problems. [Means for solving the problem]

[0006] In order to achieve the above object, according to one aspect of the present disclosure, a power supply system includes: A redundant power supply system including a plurality of power supplies, comprising: a control means, when at least one of the plurality of power supplies stops, for changing a threshold value of an overcurrent detection value flowing through an operating power supply among the plurality of power supplies from a first threshold value to a second threshold value different from the first threshold value, the operating power supply, and for causing the load to suppress a current flowing through a load of the plurality of power supplies; and, when a stopped power supply is restored, for changing a threshold value of the overcurrent detection value from the second threshold value to the first threshold value, the operating power supply, and for causing the load to stop suppressing a current by the load, the first threshold value being a value smaller than the second threshold value; and, when a current flowing through the load exceeds the first threshold value and is equal to or smaller than the second threshold value, the control means changes the threshold value of the overcurrent detection value from the second threshold value to the first threshold value, the operating power supply, and for causing the load to stop suppressing a current by the load. .

[0007] In order to achieve the above object, according to another aspect of the present disclosure, a control method includes: A control method executed by a redundant power supply system including a plurality of power supplies, the method including, when at least one of the plurality of power supplies stops, changing a threshold of an overcurrent detection value flowing through an operating power supply among the plurality of power supplies from a first threshold to a second threshold, the operating power supply, and causing the load to suppress a current flowing through a load of the plurality of power supplies, and when a stopped power supply is restored, changing a threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power supply, and causing the load to stop suppressing the current by the load, when the current flowing through the load exceeds the first threshold and is equal to or less than the second threshold, changing the threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power supply, and causing the load to stop suppressing the current by the load, the first threshold being a value smaller than the second threshold. .

[0008] In order to achieve the above object, according to another aspect of the present disclosure, a program includes: A computer of a redundant power supply system including a plurality of power supplies is caused to, when at least one of the plurality of power supplies stops, change a threshold of an overcurrent detection value flowing through an operating power supply among the plurality of power supplies from a first threshold to a second threshold, the operating power supply, and cause the load to suppress a current flowing through a load of the plurality of power supplies; when a stopped power supply is restored, change a threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power supply, and cause the load to stop suppressing the current by the load; and when a current flowing through the load exceeds the first threshold and is equal to or less than the second threshold, change the threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power supply, and cause the load to stop suppressing the current by the load, the first threshold being a value smaller than the second threshold. . Effect of the Invention

[0009] According to each aspect of the present disclosure, in a power supply system including a plurality of redundant power supplies, system downtime of the power supply system can be suppressed. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating an example of a configuration of a power supply system according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a diagram illustrating an example of a processing flow of a power supply system according to an embodiment of the present disclosure. [Diagram 3] FIG. 11 is a diagram showing an example of a processing flow of a power supply system according to another embodiment of the present disclosure. [Figure 4] FIG. 1 is a diagram illustrating a minimum configuration of a power supply system according to an embodiment of the present disclosure. [Diagram 5] FIG. 11 is a diagram illustrating an example of a processing flow of a power supply system with a minimum configuration according to an embodiment of the present disclosure. [Figure 6] FIG. 1 is a schematic block diagram illustrating a configuration of a computer according to at least one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiments will be described in detail with reference to the drawings. <Embodiment> (Power supply system configuration) A power supply system 1 according to an embodiment of the present disclosure will be described with reference to the drawings. The power supply system 1 is a redundant power supply system configured with multiple power supplies. Even if a malfunction occurs in one of the multiple power supplies and the power supply system 1 is unable to supply current to the load, the power supply system 1 can suppress unnecessary interruptions in the supply of power to the load.

[0012] 1 is a diagram showing an example of a configuration of a power supply system 1 according to an embodiment of the present disclosure. The power supply system 1 includes power supplies 10a and 10b, a current detection circuit 20, a load 30, and a control circuit 40, as shown in FIG.

[0013] The power supply 10a is a first power source that supplies power to the load 30. The power supply 10a can supply the necessary power to the load 30 by itself (i.e., in this case, even without the power supply 10b). The power supply 10b is a second power source that supplies power to the load 30. The power supply 10b can supply the necessary power to the load 30 by itself (i.e., in this case, even without the power supply 10a). In other words, the power supply system 1 shown in FIG. 1 is a system with redundant power supplies, including the power supplies 10a and 10b that can supply the necessary power to the load 30 by themselves. The power supplies 10a and 10b are sometimes collectively referred to as power supplies 10. Each of the power supplies 10 receives power from the outside and is turned on when it receives an on signal, which is a signal that turns it on, from the control circuit 40. Each of the power supplies 10 is turned off when it does not receive power from the outside or when it receives an off signal, which is a signal that turns it off, from the control circuit 40.

[0014] The current detection circuit 20 detects a current flowing from the power supply 10 to the load 30. The load 30 is a load to which the power supply 10 supplies power. An example of the load 30 is a logic unit that executes logical operations.

[0015] The control circuit 40 checks whether each of the power supplies 10 is stopped or not. In addition, the control circuit 40 outputs an ON signal to the power supply 10, which is a signal for turning the power supply 10 on. In addition, the control circuit 40 outputs an OFF signal to the power supply 10, which is a signal for turning the power supply 10 off.

[0016] In addition, the control circuit 40 receives a current monitor signal from the current detection circuit 20. The current monitor signal is a signal that indicates the current value measured by the current detection circuit 20.

[0017] Moreover, when one of the power supplies 10 stops, the control circuit 40 outputs an overcurrent value change signal to the power supplies 10 that are in operation, and outputs a load suppression signal to the load 30. Then, the control circuit 40 starts counting time. That is, the control circuit 40 starts measuring the passage of time. The overcurrent value change signal is a signal that changes the threshold of the overcurrent detection value in the power supply of the destination between a first threshold and a second threshold. The first threshold is a current value at which the power supply 10 goes into an abnormal state due to a temperature rise and stops if the current continues to flow. The second threshold is a current value at which the power supply 10 does not go into an abnormal state and does not stop for a certain period of time even if the current exceeds the first threshold. The load suppression signal is a signal that instructs the load 30 to suppress the current consumption to the rated current of one of the power supplies 10.

[0018] Furthermore, if the current flowing through the load 30 does not become equal to or less than the first threshold within a certain period of time, the control circuit 40 turns off the power supply 10. Furthermore, if the current flowing through the load 30 becomes equal to or less than the first threshold within a certain period of time, the control circuit 40 returns the threshold of the overcurrent detection value to the first threshold.

[0019] (Processing performed by the power supply system) Fig. 2 is a diagram showing an example of a processing flow of the power supply system 1 according to an embodiment of the present disclosure. The processing flow of the power supply system 1 shown in Fig. 2 shows processing performed by the power supply system 1 when a state changes from one in which the power supply 10a and the power supply 10b are both operating to one in which the power supply 10a or the power supply 10b is stopped. Next, the processing performed by the power supply system 1 will be described with reference to Fig. 2.

[0020] Each of the power supplies 10 receives power from the outside. Also, each of the power supplies 10 receives an ON signal from the control circuit 40. Then, each of the power supplies 10 changes from an OFF state to an ON state. When each of the power supplies 10 changes to the ON state, it generates power. Each of the power supplies 10 supplies the generated power to the load 30 via the current detection circuit 20.

[0021] The load 30 can operate with a current that can be passed by either the power supply 10a or the power supply 10b. However, in the event of load concentration or load fluctuation in the load 30, the current may exceed the current that can be passed by either the power supply 10a or the power supply 10b. Here, it is assumed that both the power supply 10a and the power supply 10b are operating normally, there is no overcurrent, and the load is driven normally.

[0022] Here, it is assumed that one of the power supply 10a or the power supply 10b has stopped. Here, it is assumed that the power supply 10b has stopped. The control circuit 40 receives a current monitor signal from the current detection circuit 20. The control circuit 40 determines whether or not the current value indicated by the received current monitor signal (i.e., the current value of the current flowing through the load 30) exceeds a first threshold value (step S1).

[0023] When the control circuit 40 determines that the current value indicated by the current monitor signal is equal to or less than the first threshold value (NO in step S1), the control circuit 40 returns to the process of step S1. When the control circuit 40 determines that the current value indicated by the current monitor signal exceeds the first threshold value (YES in step S1), the control circuit 40 outputs an overcurrent value change signal to the operating power supply 10a, which changes the threshold value of the overcurrent detection value from the first threshold value to the second threshold value, and outputs a load suppression signal to the load 30. Each of the power supplies 10 has a signal indicating whether it is operating or stopped, and the control circuit 40 can determine that the power supply 10a is operating and the power supply 10b is stopped by receiving the signal from each of the power supplies 10.

[0024] The power supply 10a receives an overcurrent value change signal for changing the threshold of the overcurrent detection value from the first threshold to the second threshold from the control circuit 40. In response to the received overcurrent value change signal, the power supply 10a changes the threshold of the overcurrent detection value from the first threshold to the second threshold (step S2).

[0025] Furthermore, the load 30 receives a load suppression signal from the control circuit 40. In response to the received load suppression signal, the load 30 suppresses its operation so that the current flowing through the load 30 becomes equal to or less than a first threshold value (step S3).

[0026] The control circuit 40 starts counting time as an overcurrent change timer (step S4). The control circuit 40 receives a current monitor signal from the current detection circuit 20. The control circuit 40 determines whether or not the current value indicated by the received current monitor signal exceeds a first threshold value (step S5).

[0027] When the control circuit 40 determines that the current value indicated by the current monitor signal is equal to or less than the first threshold value (NO in step S5), it resets the overcurrent change timer (step S6). That is, when the control circuit 40 determines that the current value indicated by the current monitor signal is equal to or less than the first threshold value, it sets the counting time to zero.

[0028] In addition, when the control circuit 40 determines that the current value indicated by the current monitor signal is equal to or lower than the first threshold value (NO in step S5), it outputs an overcurrent value change signal to the operating power source 10a to change the threshold value of the overcurrent detection value from the second threshold value to the first threshold value, and outputs a signal to the load 30 to cancel the load suppression signal.

[0029] The power supply 10a receives an overcurrent value change signal for changing the threshold of the overcurrent detection value from the second threshold to the first threshold from the control circuit 40. In response to the received overcurrent value change signal, the power supply 10a changes the threshold of the overcurrent detection value from the second threshold to the first threshold (step S7).

[0030] Furthermore, the load 30 receives a signal to cancel the load suppression signal from the control circuit 40. In response to the received signal to cancel the load suppression signal, the load 30 returns the suppressed operation to the operation before the suppression. In other words, the load 30 stops suppressing the operation (step S8).

[0031] Furthermore, when the control circuit 40 determines that the current value indicated by the current monitor signal exceeds the first threshold value (YES in step S5), it determines whether the current value indicated by the current monitor signal exceeds the second threshold value (step S9).

[0032] If the control circuit 40 determines that the current value indicated by the current monitor signal exceeds the second threshold value (YES in step S9), it determines that an overcurrent that makes it impossible to continue operation has occurred, and outputs an off signal to the power supply 10a that is in operation.

[0033] The power supply 10a receives an off signal from the control circuit 40. In response to the received off signal, the power supply 10a turns off (step S10). When the power supply 10a turns off, the power supply system 1 stops.

[0034] Furthermore, when the control circuit 40 determines that the current value indicated by the current monitor signal is equal to or less than the second threshold value (NO in step S9), it determines whether the overcurrent change timer has exceeded a certain time (step S11).When the control circuit 40 determines that the overcurrent change timer has not exceeded the certain time (NO in step S11), it returns to the process of step S5.

[0035] Furthermore, when the control circuit 40 determines that the overcurrent change timer has not exceeded the certain time (YES in step S11), it determines that an overcurrent that makes it impossible to continue operation has occurred, and outputs an OFF signal to the operating power supply 10a. The power supply 10a receives the OFF signal from the control circuit 40. The power supply 10a then executes the process of step S10, i.e., enters the OFF state in response to the received OFF signal.

[0036] (Specific examples) As a specific example, it is assumed that each of power supply 10a and power supply 10b operates at a rated current of 10 amperes, and the processing of power supply system 1 when load 30 operates at a maximum current of 10 amperes will be described.

[0037] Here, the current value at which an abnormality-induced shutdown occurs within a few seconds in each of power supply 10a and power supply 10b is assumed to be 12 amperes. In this case, if the current flowing through load 30 is 10 amperes to 12 amperes, an abnormality-induced shutdown will not occur within a few seconds. Regarding the thresholds for the overcurrent detection value in power supply 10a and power supply 10b, the first threshold is set to 10 amperes and the second threshold is set to 12 amperes.

[0038] When the load 30 is operating at a maximum current of 10 amperes or more, if one of the power sources 10a or 10b stops, a current of a first threshold value (10 amperes) or more flows through the load 30. When the current flowing through the load 30 exceeds the first threshold value (10 amperes), the control circuit 40 changes the overcurrent detection value to a second threshold value (12 amperes).

[0039] If the current flowing through the load 30 is 11 amperes, the control circuit 40 outputs a load suppression signal to the load 30 to suppress the current flowing through the load 30 to a first threshold value (10 amperes) or less.

[0040] Thereafter, if the load 30 drops to 10 amperes or less within a few seconds, the operating power supply 10a or power supply 10b is kept on to continue operation of the power supply system 1. However, if the load 30 does not drop to 10 amperes or less within a few seconds, the operating power supply 10a or power supply 10b is switched off to stop the power supply system 1 in order to avoid a stop due to an abnormality in the operating power supply 10a or power supply 10b.

[0041] If the current flowing through the load 30 is 13 amperes, this exceeds the second threshold (12 amperes), and so the power supply system 1 is stopped by turning off the power supply 10a or 10b that is in operation.

[0042] The power supply system 1 according to an embodiment of the present disclosure has been described above. The power supply system 1 is a redundant power supply system including a plurality of power supplies 10. In the power supply system 1, when at least one of the plurality of power supplies 10 stops, the control circuit 40 (an example of a control means) changes the threshold of the overcurrent detection value flowing through an active power supply among the plurality of power supplies 10 from a first threshold to a second threshold different from the first threshold, and causes the active power supply to suppress the current flowing through the load 30 of the plurality of power supplies 10, and when the stopped power supply is restored, changes the threshold of the overcurrent detection value from the second threshold to the first threshold, and causes the load 30 to stop suppressing the current by the load 30.

[0043] With this power supply system 1, in a power supply system having a plurality of redundant power supplies, it is possible to prevent a system failure of the power supply system.

[0044] The power supply system 1 according to another embodiment of the present disclosure may perform the processes of steps S12 to S14 described below in addition to the processes performed by the power supply system 1 according to one embodiment of the present disclosure. Fig. 3 is a diagram showing an example of a process flow of the power supply system 1 according to another embodiment of the present disclosure.

[0045] It is assumed that the power source 10a or the power source 10b stops when both the power source 10a and the power source 10b are operating normally. Here, it is assumed that the power source 10b has stopped. The control circuit 40 judges whether or not only one power source 10 has stopped (step S12). When the control circuit 40 judges that only one power source 10 has stopped (YES in step S12), the control circuit 40 proceeds to the process of step S1. When the control circuit 40 judges that not only one power source 10 has stopped, that is, when the control circuit 40 judges that both the power source 10a and the power source 10b are operating (NO in step S12), the control circuit 40 outputs an overcurrent value change signal to the operating power source 10a and the power source 10b, which changes the threshold of the overcurrent detection value from the second threshold to the first threshold, and outputs a signal to the load 30 to cancel the load suppression signal.

[0046] Each of the power supply 10a and the power supply 10b receives an overcurrent value change signal for changing the threshold of the overcurrent detection value from the second threshold to the first threshold from the control circuit 40. Each of the power supply 10a and the power supply 10b changes the threshold of the overcurrent detection value from the second threshold to the first threshold in response to the received overcurrent value change signal (step S13).

[0047] Furthermore, the load 30 receives a signal to cancel the load suppression signal from the control circuit 40. In response to the received signal to cancel the load suppression signal, the load 30 returns the suppressed operation to the operation before suppression. That is, the load 30 stops suppressing the operation (step S14). Then, the load 30 returns to the process of step S12.

[0048] Furthermore, in the power supply system 1 according to another embodiment of the present disclosure, when the load 30 stops suppressing the operation in step S8, the load 30 returns to the process of step S12.

[0049] Like the power supply system 1 according to an embodiment of the present disclosure, this power supply system 1 can also suppress system downs in a power supply system that includes a plurality of redundant power supplies.

[0050] The power supply system 1 according to each embodiment of the present disclosure described above has been described as having two power supplies, power supply 10a and power supply 10b. However, the power supply system 1 according to another embodiment of the present disclosure may have three or more power supplies, and one or more power supplies may be stopped.

[0051] FIG. 4 is a diagram showing a minimum configuration of a power supply system 1 according to an embodiment of the present disclosure. The power supply system 1 is a redundant power supply system including a plurality of power supplies. As shown in FIG. 4, the power supply system 1 includes a control means 100. When at least one of the plurality of power supplies stops, the control means 100 changes the threshold of an overcurrent detection value flowing through an operating power supply among the plurality of power supplies from a first threshold to a second threshold different from the first threshold, and causes the operating power supply to suppress a current flowing through a load of the plurality of power supplies, and when the stopped power supply is restored, the control means 100 changes the threshold of the overcurrent detection value from the second threshold to the first threshold, and causes the load to stop suppressing the current by the load. The control means 100 can be realized, for example, by using a function possessed by the control circuit 40 illustrated in FIG. 1.

[0052] 5 is a diagram showing an example of a processing flow of the power supply system 1 with a minimum configuration according to the embodiment of the present disclosure. Next, processing of the power supply system 1 with a minimum configuration according to the embodiment of the present disclosure will be described with reference to FIG.

[0053] In the power supply system 1, which is a redundant power supply system including a plurality of power sources, when at least one of the plurality of power sources stops, the control means 100 changes the threshold of the overcurrent detection value flowing to an operating power source among the plurality of power sources from a first threshold to a second threshold different from the first threshold, and causes the operating power source to suppress the current flowing to the load of the plurality of power sources, and when the stopped power source is restored, changes the threshold of the overcurrent detection value from the second threshold to the first threshold, and causes the load to stop suppressing the current by the load (step S101).

[0054] The above has described the power supply system 1 with a minimum configuration according to an embodiment of the present disclosure. With this power supply system 1, in a power supply system including a plurality of redundant power supplies, it is possible to prevent a system failure of the power supply system.

[0055] It should be noted that the order of the processes in the embodiments of the present disclosure may be changed as long as appropriate processes are performed.

[0056] Although the embodiments of the present disclosure have been described, the above-mentioned power supply system 1, power supply 10, current detection circuit 20, load 30, control circuit 40, and other control devices may have a computer system therein. The above-mentioned process steps are stored in a computer-readable recording medium in the form of a program, and the above-mentioned process is performed by the computer reading and executing this program. Specific examples of computers are shown below.

[0057] 6 is a schematic block diagram showing the configuration of a computer according to at least one embodiment. As shown in FIG. 6, the computer 5 includes a CPU 6, a main memory 7, a storage 8, and an interface 9.

[0058] For example, the above-mentioned power supply system 1, power supply 10, current detection circuit 20, load 30, control circuit 40, and other control devices are each implemented in a computer 5. The operations of each of the above-mentioned processing units are stored in the form of a program in a storage 8. A CPU 6 reads the program from the storage 8, loads it in the main memory 7, and executes the above-mentioned processing in accordance with the program. The CPU 6 also secures storage areas in the main memory 7 corresponding to each of the above-mentioned storage units in accordance with the program.

[0059] Examples of the storage 8 include a hard disk drive (HDD), a solid state drive (SSD), a magnetic disk, a magneto-optical disk, a compact disc read only memory (CD-ROM), a digital versatile disc read only memory (DVD-ROM), and a semiconductor memory. The storage 8 may be an internal medium directly connected to the bus of the computer 5, or an external medium connected to the computer 5 via an interface 9 or a communication line. In addition, when the program is distributed to the computer 5 via a communication line, the computer 5 that receives the program may load the program into the main memory 7 and execute the above-mentioned process. In at least one embodiment, the storage 8 is a non-transitory tangible storage medium.

[0060] The program may also realize some of the functions described above. Furthermore, the program may be a file that can realize the functions described above in combination with a program already recorded in the computer system, that is, a so-called differential file (differential program).

[0061] Although some embodiments of the present disclosure have been described, these embodiments are merely examples and do not limit the scope of the disclosure. Various additions, omissions, substitutions, and modifications may be made to these embodiments without departing from the spirit of the disclosure.

[0062] Note that some or all of the above-described embodiments can be described as, but are not limited to, the following supplementary notes.

[0063] (Appendix 1) A redundant power supply system including a plurality of power supplies, a control means for, when at least one of the plurality of power sources is stopped, changing a threshold value of an overcurrent detection value flowing through an operating power source among the plurality of power sources from a first threshold value to a second threshold value different from the first threshold value, the operating power source, and causing the load to suppress a current flowing through the load of the plurality of power sources, and, when the stopped power source is restored, changing a threshold value of the overcurrent detection value from the second threshold value to the first threshold value, the operating power source, and causing the load to stop suppressing the current by the load; A power supply system comprising:

[0064] (Appendix 2) The first threshold value is This is the current value at which, if the current continues to flow through the power supply in operation, the temperature rises and the power supply in operation goes into an abnormal state and stops. 2. The power supply system of claim 1.

[0065] (Appendix 3) The second threshold value is A current value that does not cause the operating power supply to enter an abnormal state or stop for a certain period of time even if the first threshold is exceeded. 2. The power supply system of claim 1 .

[0066] (Appendix 4) the first threshold is smaller than the second threshold, The control means When the current flowing through the load exceeds the first threshold and is equal to or less than the second threshold, changing the threshold of the overcurrent detection value from the second threshold to the first threshold in the operating power supply, and causing the load to stop suppressing the current through the load. 4. The power supply system according to claim 1 ,

[0067] (Appendix 5) A control method executed by a redundant power supply system including a plurality of power supplies, when at least one of the multiple power sources stops, changing a threshold of an overcurrent detection value flowing through an operating power source among the multiple power sources from a first threshold to a second threshold, the operating power source, and causing the load to suppress a current flowing through the load of the multiple power sources, and when the stopped power source is restored, changing a threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power source, and causing the load to stop suppressing the current; A control method comprising:

[0068] (Appendix 6) For computers with redundant power systems that include multiple power supplies, when at least one of the multiple power sources stops, changing a threshold of an overcurrent detection value flowing through an operating power source among the multiple power sources from a first threshold to a second threshold, the operating power source, and causing the load to suppress a current flowing through the load of the multiple power sources, and when the stopped power source is restored, changing a threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power source, and causing the load to stop suppressing the current; A program that executes the following. [Explanation of symbols]

[0069] 1. Power supply system 5. Computers 6. CPU 7. Main memory 8. Storage 9. Interface 10...Power supply 20. Current detection circuit 30 Load 40... Control circuit 100... Control means

Claims

1. A redundant power supply system including a plurality of power supplies, a control means for, when at least one of the plurality of power sources is stopped, changing a threshold value of an overcurrent detection value flowing through an operating power source among the plurality of power sources from a first threshold value to a second threshold value different from the first threshold value, the operating power source, and causing the load to suppress a current flowing through the load of the plurality of power sources, and, when the stopped power source is restored, changing a threshold value of the overcurrent detection value from the second threshold value to the first threshold value, the operating power source, and causing the load to stop suppressing the current by the load; Equipped with the first threshold value is smaller than the second threshold value, The control means When the current flowing through the load exceeds the first threshold and is equal to or less than the second threshold, changing the threshold of the overcurrent detection value from the second threshold to the first threshold in the operating power supply, and causing the load to stop suppressing the current through the load. Power supply system.

2. The first threshold value is This is the current value at which, if the current continues to flow through the power supply in operation, the temperature rises and the power supply in operation goes into an abnormal state and stops. The power supply system of claim 1 .

3. The second threshold value is A current value that does not cause the operating power supply to enter an abnormal state or stop for a certain period of time even if the first threshold is exceeded. The power supply system of claim 1 .

4. A control method executed by a redundant power supply system including a plurality of power supplies, when at least one of the multiple power sources stops, changing a threshold of an overcurrent detection value flowing through an operating power source among the multiple power sources from a first threshold to a second threshold, the operating power source, and causing the load to suppress a current flowing through a load of the multiple power sources; when a stopped power source is restored, changing a threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power source, and causing the load to stop suppressing the current by the load; when the current flowing through the load exceeds the first threshold and is equal to or less than the second threshold, changing the threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power source, and causing the load to stop suppressing the current by the load; Including, The first threshold value is smaller than the second threshold value. Control methods.

5. For computers with redundant power systems that include multiple power supplies, when at least one of the multiple power sources stops, changing a threshold of an overcurrent detection value flowing through an operating power source among the multiple power sources from a first threshold to a second threshold, the operating power source, and causing the load to suppress a current flowing through a load of the multiple power sources; when a stopped power source is restored, changing a threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power source, and causing the load to stop suppressing the current by the load; when the current flowing through the load exceeds the first threshold and is equal to or less than the second threshold, changing the threshold of the overcurrent detection value from the second threshold to the first threshold, the operating power source, and causing the load to stop suppressing the current by the load; Run the command, The first threshold value is smaller than the second threshold value. program.

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