JP2019118205A - Redundant power supply system, power supply device, test execution device, test method, and test program - Google Patents

Abstract

To provide a redundant power supply system in which a failure in a power supply device included in the redundant power supply system can be inspected.SOLUTION: A power supply device 100 includes: a stabilization power source unit 110; a backflow prevention unit 120; a comparator 140 that outputs an alarm when an output voltage is lower than a rated voltage for operating a load 300 and is equal to or lower than a prescribed voltage which can operate the load; and test control means 150 that lowers the output voltage when a voltage lowering test is started, that stops lowering of the output voltage when the alarm is output or when the output voltage reaches a voltage which cannot operate the load, and that transmits a signal indicative of whether or not the alarm has been output. Regarding the plurality of power supply devices connected in parallel with one another and all combinations of the minimum number of the power supply devices required to operate the load, a test execution device causes all the power supply devices not included in each of the combinations to start the voltage lowering test, and outputs the result of the test.SELECTED DRAWING: Figure 2

Description

  The present invention relates to techniques for supplying power to electrical devices.

  In the present specification, a power supply that supplies power to a load (one or more electric devices as a whole) by a plurality of power supply devices (power supply units) will be referred to as a “central power supply”.

  In the centralized power supply, compared to the case where individual power supplies are prepared for individual electrical devices, the number of power supply devices can be reduced by power leveling, and the conversion efficiency of output power to input power can be improved. It has the effect of being able to

  Centralized power supplies often adopt an "n + m redundant power supply" (hereinafter, also simply referred to as "redundant power supply") configuration in order to enhance fault tolerance in individual power supply devices. In the present specification, the n + m redundant power supply means that when the load requires at least n (n: natural number) power supply devices, the load is normally generated by the n + m (m: natural number) power supply devices. When the power supply devices of 1 to m out of the n + m power supply devices fail, the load is operated by the non-failed power supply devices of the n + m power supply devices. The n + m redundant power supply may be customarily referred to as an "n + n redundant power supply", but is referred to herein as an n + m redundant power supply.

  In a centralized power supply or redundant power supply, since a plurality of power supply devices are connected in parallel with each other, each power supply device has a mechanism for preventing the flow of current from the other power supply devices (hereinafter referred to as "backflow prevention mechanism") Often referred to as

  Patent Document 1 discloses an example of a power supply technology having a backflow prevention mechanism. The power supply redundant circuit of Patent Document 1 is a power supply redundant circuit in which a plurality of power supply units are connected in parallel to a load. Each power supply unit includes a MOS (Metal Oxide Semiconductor) transistor, a comparison determination circuit, and a control circuit. The MOS transistor is inserted in the power supply path from the power supply (DC (Direct Current) -DC converter) to the load. The comparison and determination circuit compares and determines the magnitude relationship between the terminal voltage on the load side of the MOS transistor and the terminal voltage on the power supply side of the MOS transistor. The control circuit controls on / off of the MOS transistor based on the comparison determination result by the comparison determination circuit. As a result of the above configuration, the power supply redundant circuit of Patent Document 1 prevents a sneak current from another power supply connected in parallel.

JP, 2010-220304, A

  A case where, for example, a 1 + 1 redundant power supply is configured by the power supply redundant circuit of Patent Document 1 will be described. In the power supply redundant circuit of Patent Document 1, even if one of the two power supply units does not fail at first, even if one of the power supply units fails, the power supply unit that has not failed is supplied by the failed power supply unit. By increasing the supplied power by the amount of power, the same power as before the failure is supplied. That is, in the power supply redundant circuit of Patent Document 1, even if one of the two power supply units fails, the load can be operated normally. However, in the power supply redundant circuit of Patent Document 1, if only one of the two power supply units fails at first, if the other power supply unit fails on the way, the same power as before the failure occurrence in the other power supply unit Can not supply. That is, in the power supply redundant circuit of Patent Document 1, when both of the two power supply units fail, the load can not be operated normally.

  Even if each power supply unit is not completely broken at first and operates normally at first glance, the power supply redundant circuit of Patent Document 1 may not be able to normally operate the load halfway. For example, first, one of the two power supplies can supply 50% or less of the power required to operate the load, but supply more than 50% of the power required to operate the load. Suppose that it has a failure (partial failure) that is impossible. Also, it is assumed that the other power supply unit has no failure at first. In this case, first, since each power supply unit can supply 50% of the power required for the operation of the load, the power supply redundant circuit can operate the load normally. However, if the power supply unit that did not have a failure first fails on the way, the power supply redundant circuit can not provide the load because the power supply unit with the partial failure can not supply 100% of the power required for the operation of the load. It can not be operated normally.

  Usually, it is difficult to diagnose such a partial failure at the time of operation of the power supply unit. Therefore, in the power supply redundant circuit of Patent Document 1, it is necessary for each power supply unit to inspect a failure when the power supply unit is not operating. Conducting the inspection of the power supply unit (power supply device) at an appropriate frequency at the time of non-operation has a problem of causing a decrease in service availability and an increase in maintenance man-hours.

  The present invention has been made in view of the above problems, and has as its main object to inspect a failure in a power supply device included in a redundant power supply system at the time of operation of the redundant power supply system.

  In one aspect of the present invention, a redundant power supply system includes: a stabilized power supply unit converting input power into DC power having an output voltage value; and supplying DC power converted by the stabilized power supply unit to a load The reverse current prevention unit for preventing the reverse current of the DC power on the side of the load and the absolute value of the load-side voltage value on the load side of the reverse current prevention unit have an absolute value lower than the rated voltage for operating the load and operate the load The comparator that outputs an alarm signal when it is less than or equal to the absolute value of the predetermined reference voltage that can be used and the absolute value of the output voltage at the stabilized power supply unit when the voltage drop test start signal is received Start the voltage drop control to lower the voltage from the voltage of the voltage of the comparator, and when the alarm signal is output by the comparator, or the absolute value of the output voltage value reaches a voltage at which it is impossible to operate the load. Test control means for stopping voltage drop control and transmitting a result signal of a voltage drop test indicating whether an alarm signal is output during voltage drop control. And all the power supplies not included in each combination for each combination in all combinations of the plurality of power supply devices connected in parallel with each other and the minimum necessary power supply device for operating the load. The start signal of the voltage drop test is sent to the device, and the result signal of the voltage drop test according to the sent signal of the voltage drop test is received from all the power supply devices not included in each combination, and the received voltage drop is received. The test execution device outputs the result of the brownout test based on the test result signal.

  In one aspect of the present invention, a power supply apparatus includes: a stabilized power supply unit that converts input power into DC power having an output voltage value; and supplies the DC power converted by the stabilized power supply unit to a load The reverse current prevention unit for preventing the reverse current of the DC power on the side of the load and the absolute value of the load-side voltage value on the load side of the reverse current prevention unit have an absolute value lower than the rated voltage for operating the load and operate the load The comparator that outputs an alarm signal when it is less than or equal to the absolute value of the predetermined reference voltage that can be used and the absolute value of the output voltage at the stabilized power supply unit when the voltage drop test start signal is received Starting the voltage drop control to lower the voltage from the voltage above, when the alarm signal is output by the comparator, or when the absolute value of the output voltage value reaches a voltage that makes it impossible to operate the load. Test control means for stopping voltage drop control and transmitting a result signal of voltage drop test indicating whether an alarm signal is output during voltage drop control when deceiving Prepare.

  In one aspect of the present invention, the test execution device supplies a stabilized power supply unit that converts input power into DC power having an output voltage value, and supplies DC power converted by the stabilized power supply unit to a load, and The reverse current prevention unit for preventing the reverse current of the DC power on the side of the load and the absolute value of the load-side voltage value on the load side of the reverse current prevention unit have an absolute value lower than the rated voltage for operating the load and operate the load The comparator that outputs an alarm signal when it is less than or equal to the absolute value of the predetermined reference voltage that can be used and the absolute value of the output voltage at the stabilized power supply unit when the voltage drop test start signal is received Starting when the alarm signal is output by the comparator, or when the absolute value of the output voltage value reaches a voltage at which it is impossible to operate the load. Test control to stop the voltage drop control and to transmit the result signal of the voltage drop test indicating whether the alarm signal is output during the voltage drop control. Means connected to the plurality of power supply devices connected in parallel with each other, and all combinations not included in each combination for each combination in all combinations of the minimum required power supply devices for operating the load The start signal of the voltage drop test is transmitted to the power supply devices of the above, and the result signal of the voltage drop test corresponding to the start signal of the voltage drop test is received from all the power supply devices not included in each combination and received. The result of the voltage drop test is output based on the result of the voltage drop test.

  In one aspect of the present invention, a test method of a power supply apparatus includes: supplying a stabilized power supply unit that converts input power to DC power having an output voltage value; and DC power converted by the stabilized power supply unit to a load. Also, the absolute value of the load-side voltage value on the load side of the backflow prevention section that prevents the reverse flow of DC power on the load side and the load side of the reverse flow prevention section is lower in absolute value than the rated voltage for operating the load. A plurality of power supply devices connected in parallel with each other, including a comparator that outputs an alarm signal when the absolute value of the predetermined reference voltage value that can operate is less than or equal to the predetermined value and test control means; A testing method of a power supply device in a redundant power supply system including an execution device, comprising: when the start signal of the voltage drop test is received by the power supply device, the stabilized power supply unit Initiating voltage drop control to lower the current value from the current value, and when the alarm signal is output by the comparator, or the absolute value of the output voltage value has reached a voltage at which it is impossible to operate the load Test control procedure for stopping the voltage drop control and transmitting the result signal of the voltage drop test indicating whether the alarm signal is output during the voltage drop control. And the test execution device transmits a start signal of the brownout test to all the power supply devices not included in each combination, for each combination of all the combinations of the minimum necessary power supply devices for operating the load. , A voltage drop test result signal corresponding to the transmitted voltage drop test start signal is received from all the power supply devices not included in each combination, and based on the received voltage drop test result signal. And it outputs the result of the voltage drop test Te.

  In one aspect of the present invention, a test program of a power supply device or a non-transitory storage medium storing such a test program converts a input power into a DC power having an output voltage value, and While supplying the DC power converted by the stabilized power supply unit to the load and preventing the backflow of the DC power on the load side, the absolute value of the load-side voltage value on the load side of the backflow prevention unit is A comparator that outputs an alarm signal when the absolute value is lower than a rated voltage for operating the load and is less than or equal to an absolute value of a predetermined reference voltage value capable of operating the load; A start signal of a brownout test to a computer provided in a power supply apparatus in a redundant power supply system including a plurality of power supply apparatuses connected in parallel with one another and a test execution apparatus Starting the voltage drop control to reduce the absolute value of the output voltage value from the current voltage to the stabilized power supply unit when receiving it, and when the alarm signal is output by the comparator, or the absolute value of the output voltage value is When it is considered that the voltage which can not operate the load is reached, the voltage drop indicating that the alarm signal is output during the voltage drop control is stopped and the voltage drop is indicated. And transmitting a test result signal to execute a test control process.

  In one aspect of the present invention, a test program of a test execution apparatus or a non-transitory storage medium storing such a test program converts a input power into a DC power having an output voltage value; While supplying the DC power converted by the stabilized power supply unit to the load and preventing the backflow of the DC power on the load side, the absolute value of the load-side voltage value on the load side of the backflow prevention unit is A comparator that outputs an alarm signal when the absolute value is lower than a rated voltage for operating the load and is less than or equal to an absolute value of a predetermined reference voltage value capable of operating the load; In order to operate a load in a computer provided in a test execution device in a redundant power supply system including a plurality of power supply devices connected in parallel with one another and a test execution device Low limit For each combination in all combinations of required power supply devices, the start signal of the brownout test is transmitted to all the power supplies not included in each combination, and the voltage according to the start signal of the brownout test transmitted A signal indicating the result of the drop test is received from all the power supply devices not included in each combination, and a process of outputting the result of the drop test based on the received result signal of the drop test is executed.

  According to the present invention, it is possible to inspect a failure in the power supply apparatus included in the redundant power supply system at the time of operation of the redundant power supply system.

It is a block diagram showing an example of composition of a redundant power supply system in a 1st embodiment of the present invention. It is a block diagram which shows an example of a structure of the electric power supply apparatus in the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the electric power supply apparatus in the 1st Embodiment of this invention. It is a graph explaining the operation | movement in case the load side voltage value is maintained by the other electric power supply apparatus at the time of the voltage drop test in an electric power supply apparatus. It is a graph explaining the operation | movement when the load side voltage value is not maintained by another electric power supply apparatus at the time of the voltage drop test in an electric power supply apparatus. It is a flowchart which shows operation | movement of the test execution apparatus in the 1st Embodiment of this invention. It is a table | surface explaining the 1st operation example of the redundant power supply system in the 1st Embodiment of this invention. It is a table | surface explaining the 2nd operation example of the redundant power supply system in the 1st Embodiment of this invention. It is a table | surface explaining the 3rd operation example of the redundant power supply system in the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of the redundant power supply system in the 2nd Embodiment of this invention. It is a block diagram which shows an example of a structure of the electric power supply apparatus in the 2nd Embodiment of this invention. It is a block diagram which shows the 1st structural example of the electric power supply apparatus in the 2nd Embodiment of this invention. It is a block diagram which shows the 2nd structural example of the electric power supply apparatus in the 2nd Embodiment of this invention. It is a block diagram which shows an example of the hardware configuration which can implement | achieve the electric power supply apparatus in each embodiment of this invention, a test execution apparatus, a server, or BMC.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and the description thereof will be appropriately omitted.
First Embodiment
A first embodiment of the present invention, which is the basis of each embodiment of the present invention, will be described.

  The configuration in the present embodiment will be described.

  FIG. 1 is a block diagram showing an example of the configuration of a redundant power supply system according to a first embodiment of the present invention.

  The redundant power supply system 600 of the present embodiment includes a plurality of power supply devices 100, a load 300, and a test execution device 510.

  The plurality of power supply devices 100 are connected in parallel to the load 300. The plurality of power supply devices 100 are centralized power supplies that form a redundant configuration for the load 300. The power supply device 100 is, for example, an A / D (AC / DC: Alternating Current to Direct Current) converter, or a D / D (DC / DC: Direct Current to Direct Current) converter.

  The load 300 is one or more optional electrical devices operable by the plurality of power supply devices 100. The electrical device is, for example, a server, a peripheral device, or a BMC (Baseboard Management Controller).

  The test execution device 510 causes the power supply device 100 to execute a voltage drop test (described later). The test execution device 510 includes a test execution unit 500. The test execution device 510 may be any one of the plurality of power supply devices 100. The test execution unit 510 may be included in the load 300.

  FIG. 2 is a block diagram showing an example of the configuration of the power supply device according to the first embodiment of the present invention.

  The power supply apparatus 100 includes a stabilized power supply unit 110, a backflow prevention unit 120, a comparator 140, and a test control unit 150. However, the power supply device 100 itself (in particular, the backflow prevention unit 120, the reference voltage value 130, and the test control unit 150) operates independently of the presence or absence of the output by the power supply device 100.

  The stabilized power supply unit 110 converts the input power 200 into DC power having an output voltage value Vr.

  The backflow prevention unit 120 supplies the DC power converted by the stabilized power supply unit 110 to the load 300 and prevents backflow of the DC power on the load 300 side of the power supply device 100.

  The comparator 140 outputs the alarm signal Valarm when the absolute value of the load-side voltage value Vout on the load 300 side of the backflow prevention unit 120 is equal to or less than the absolute value of the predetermined reference voltage value 130 (Vref). The reference voltage value Vref is a voltage whose absolute value is lower than the rated voltage for operating the load 300 and which is capable of operating the load 300. Here, the reference voltage value Vref may be a voltage value obtained by adding a predetermined margin to the lowest voltage value capable of operating the load 300.

The test control unit 150 controls the stabilized power supply unit 110 based on the test control signal from the test execution unit 510 and the alarm signal Valarm from the comparator 140. The test control unit 150
I) starting the voltage drop control to lower the absolute value of the output voltage value Vr from the current voltage to the stabilized power supply unit 110 when the start signal of the voltage drop test is received,
II) When the alarm signal Valarm is output by the comparator 140 or when it is considered that the absolute value of the output voltage value Vr has reached a voltage at which the load 300 can not be operated, To stop and
III) transmitting a voltage drop test result signal indicating whether the alarm signal Valarm is output during the voltage drop control (the voltage drop test has failed). In the above I), the absolute value of the output voltage value Vr is the load until the termination of the voltage drop control actually exerts an effect even when the voltage drop control is suspended in the above II) It is assumed that 300 is gradually lowered within the range of normal operation.

The test execution unit 500
IV) For each combination of all the combinations of power supply devices 100 required to operate load 300,
i) Send a start signal of the brownout test to all the power supply devices 100 not included in each combination;
ii) receiving a voltage drop test result signal corresponding to the transmitted voltage drop test start signal from all the power supply devices 100 not included in each combination;
V) Output the result of the voltage drop test based on the received signal of the voltage drop test.

  The operation in this embodiment will be described.

  FIG. 3 is a flowchart showing the operation of the power supply device according to the first embodiment of the present invention. Note that the flowchart shown in FIG. 3 and the following description are an example, and the processing order may be switched, the processing may be returned, the processing may be repeated, or the processing may be canceled halfway according to the processing to be obtained as appropriate. .

  First, the power supply apparatus 100 receives a start signal of the voltage drop test (step S110).

  Next, the power supply device 100 starts voltage reduction control to reduce the absolute value of the output voltage value Vr from the current voltage to the stabilized power supply unit 110 (step S120).

  Subsequently, the power supply device 100 determines whether the alarm signal Valarm is output by the comparator 140 (step S130). If the alarm signal Valarm is output by the comparator 140 (step S130: Yes), the power supply apparatus 100 proceeds to step S150. If the alarm signal Valarm is not output by the comparator 140 (step S130: No), the power supply apparatus 100 proceeds to step S140.

  Subsequently, the power supply device 100 determines whether the absolute value of the output voltage value Vr is considered to have reached a voltage at which the load 300 can not be operated (step S140). If the power supply device 100 determines that the absolute value of the output voltage value Vr has reached a voltage at which the load 300 can not be operated (step S140: Yes), the process proceeds to step S150. If it is considered that the absolute value of the output voltage value Vr has not reached the voltage at which the load 300 can not be operated (step S140: No), the power supply device 100 proceeds to step S130. return.

  Subsequently, the power supply device 100 cancels the voltage drop control (step S150). As a result, the output voltage value Vr recovers to the voltage value before the start of the voltage drop test.

  Subsequently, the power supply apparatus 100 transmits, to the test execution apparatus 510, a result signal of the voltage drop test indicating whether the alarm signal Valarm is output during the voltage drop control (the voltage drop test has failed). Do.

  FIG. 4 is a graph for explaining the operation when the load-side voltage value is maintained by another power supply device at the time of the voltage drop test in the power supply device.

  As shown in FIG. 4, since a certain power supply device 100 starts the voltage drop test at time t1, the output voltage value Vr gradually decreases.

  As shown in FIG. 4, at the time of the voltage drop test in the power supply apparatus 100, the load-side voltage value Vout is maintained by the other power supply apparatus 100, so that the alarm signal Valarm is not output even after time t2. .

  As shown in FIG. 4, at the time of the voltage drop test in the power supply apparatus 100, since the load-side voltage value Vout is maintained by the other power supply apparatus 100, it is assumed that the output voltage value Vr becomes almost 0. Also at time t3, the alarm signal Valarm is not output.

  FIG. 5 is a graph for explaining the operation in the case where the load side voltage value is not maintained by another power supply device at the time of the voltage drop test in the power supply device.

  As shown in FIG. 5, since a certain power supply apparatus 100 starts the voltage drop test at time t1, both the load-side voltage value Vout and the output voltage value Vr gradually decrease.

  As shown in FIG. 5, the load voltage value Vout is not maintained by the other power supply devices 100 during the voltage drop test in the power supply device 100, so the load voltage value Vout exceeds the reference voltage value Vref at time t2. , Alarm signal Valarm is output.

  As shown in FIG. 5, when the alarm signal Valarm is output, the voltage drop test is stopped. Therefore, at time t4, both the load side voltage value Vout and the output voltage value Vr become the voltage before the voltage drop test. Return. Here, if the time required from the output of the alarm signal Valarm to the termination of the voltage drop test can not be ignored, the reference voltage value Vref may be set to a voltage value including a predetermined margin.

  FIG. 6 is a flowchart showing the operation of the test execution apparatus in the first embodiment of the present invention. Note that the flowchart shown in FIG. 6 and the following description are an example, and the processing order may be switched, the processing may be returned, the processing may be repeated, or the processing may be canceled halfway according to the processing to be obtained as appropriate. .

  First, the test execution device 510 acquires information on the redundant configuration of the power supply device 100 (step S210). Here, the information on the redundant configuration is, for example, that the power supply apparatus 100 configures the n + m redundant power supply in the redundant power supply system 600, the parameters (n and m) in the n + m redundant power supply, and the voltage drop test for each power supply apparatus 100. It includes the destination (address) etc. when transmitting the start signal etc. The power supply devices 100 may have different supplyable powers.

  Next, the test execution apparatus 510 executes the procedure up to immediately before step S250 below for each combination of the power supply apparatus 100 that is the minimum necessary to operate the load 300 (step S220). Here, each combination is, for example, any one of all combinations related to the n power supply devices 100 when the power supply device 100 configures an n + m redundant power supply in the redundant power supply system 600.

  Subsequently, the test execution device 510 transmits a start signal of the brownout test to all the power supply devices 100 not included in each combination (step S230).

  Subsequently, the test execution device 510 receives a voltage drop test result signal from all the power supply devices 100 not included in each combination (step S240). Here, in the voltage drop test, the result signal fails (NG) when the alarm signal Valarm is output, and is successful (OK) when the alarm signal Valarm is not output.

  When the procedure from step S220 to immediately before step S250 ends for all combinations in step S220, the test execution apparatus 510 outputs the result of the voltage drop test based on the received result signal of the voltage drop test. Here, the result of the voltage drop test is failure (NG) when the alarm signal Valarm is output in any of the voltage drop tests, and when the alarm signal Valarm is not output in any of the voltage drop tests. Assume that it is successful (OK). Also, the result of the brownout test may include information identifying a normal (non-faulty) power supply device 100.

  As described above, the redundant power supply system 600 outputs the power of all the power supply devices 100 not included in each combination for each combination of all the combinations of the power supply devices 100 necessary for operating the load 300. A voltage drop test is started to gradually reduce the absolute value of the voltage value Vr from the current voltage. Then, the redundant power supply system 600 cancels the started voltage drop test when the absolute value of the load-side voltage value Vout becomes less than or equal to the absolute value of the predetermined reference voltage value Vref. Here, since the reference voltage value Vref is a voltage whose absolute value is lower than the rated voltage for operating the load 300 and the load 300 can be operated, the load 300 can continue its operation. Then, when the absolute value of the load-side voltage value Vout becomes equal to or less than the absolute value of the predetermined reference voltage value Vref, the redundant power supply system 600 lowers the absolute value of the output voltage value Vr in the voltage drop test. It is determined that one of the power supply devices 100 is broken. Here, detectable faults may include the partial faults described above. On the other hand, if the absolute value of load-side voltage value Vout does not fall below the absolute value of predetermined reference voltage value Vref, redundant power supply system 600 reduces the absolute value of output voltage value Vr in the voltage drop test. It is determined that the power supply apparatus 100 which has not been failed has not failed.

  Subsequently, a first operation example of the redundant power supply system 600 will be described.

  FIG. 7 is a table for explaining a first operation example of the redundant power supply system according to the first embodiment of the present invention. Here, the redundant power supply system 600 includes four power supply devices 100 (P1, P2, P3, and P4), and the power supply device 100 configures a 3 + 1 redundant power supply. In FIG. 7, in the first column, the timing at which each voltage drop test is performed, and in the second to fifth columns, each power supply device 100 (P1, P2, P3, P4) drops the voltage in each voltage drop test. It indicates whether it is possible (Yes) or not (No). Further, in FIG. 7, the sixth column shows whether or not the series of voltage drop tests have failed (NG), and the seventh column shows the power supply apparatus 100 which is confirmed to be normal as a result of the voltage drop test. .

  Since the power supply apparatus 100 constitutes a 3 + 1 redundant power supply, the combination of the power supply apparatus 100 necessary to operate the load 300 is any combination of three.

  At timing T1, the power supply P1 is voltage-dropped, and the other power-supply devices P2, P3 and P4 are not voltage-dropped. At this time, the alarm signal Valarm was not output. Therefore, the power supply devices P2, P3 and P4 are normal.

  At timing T2, the power supply P2 is voltage-dropped, and the other power supplies P1, P3, and P4 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, one of the power supply devices P1, P3 and P4 has failed.

  At timing T3, the voltage of the power supply device P3 is reduced, and the voltage of the other power supply devices P1, P2, and P4 is not reduced. At this time, the alarm signal Valarm was output. Therefore, any one of the power supply devices P1, P2, P4 has failed.

  At timing T4, the power supply P4 is voltage-dropped, and the other power-supply devices P1, P2 and P3 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, one of the power supply devices P1, P2, P3 has failed.

  As a result of the voltage drop test at timings T1 to T4, it is output that the power supply device P1 has failed and the power supply devices P2, P3, and P4 are normal.

  Subsequently, a second operation example of the redundant power supply system 600 will be described.

  FIG. 8 is a table for explaining a second operation example of the redundant power supply system according to the first embodiment of the present invention. Here, the redundant power supply system 600 includes four power supply devices 100 (P1, P2, P3, and P4), and the power supply device 100 configures a 2 + 2 redundant power supply. In FIG. 8, the first column indicates the timing at which each voltage drop test is performed, and the second to fifth columns cause the power supply devices 100 (P1, P2, P3, P4) to drop the voltage in each voltage drop test. It indicates whether it is possible (Yes) or not (No). Further, in FIG. 8, the sixth column shows whether or not the series of voltage drop tests failed (NG), and the seventh column shows the power supply apparatus 100 which is confirmed to be normal as a result of the voltage drop test. .

  Since the power supply apparatus 100 constitutes a 2 + 2 redundant power supply, the combination of the power supply apparatus 100 required to operate the load 300 is any combination of two.

  At timing T1, the power supply devices P1 and P2 are voltage-dropped, and the other power supply devices P3 and P4 are not voltage-dropped. At this time, the alarm signal Valarm was not output. Therefore, the power supply devices P3 and P4 are normal.

  At timing T2, the power supply devices P2 and P3 are voltage-dropped, and the other power supply devices P1 and P4 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, one of the power supply devices P1 and P4 has failed.

  At timing T3, the power supply devices P3 and P4 are voltage-dropped, and the other power supply devices P1 and P2 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, one of the power supply devices P1 and P2 has failed.

  At timing T4, the power supply devices P1 and P4 are voltage-dropped, and the other power supply devices P2 and P3 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, either of the power supply devices P2 and P3 has failed.

  At timing T5, the power supply devices P2 and P4 are voltage-dropped, and the other power supply devices P1 and P3 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, one of the power supply devices P1 and P3 has failed.

  At timing T6, the power supply devices P1 and P3 are voltage-dropped, and the other power supply devices P2 and P4 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, either of the power supply devices P2 and P4 has failed.

  As a result of the voltage drop test at timings T1 to T6, it is output that the power supply devices P1 and P2 have failed and the power supply devices P3 and P4 are normal.

  Subsequently, a third operation example of the redundant power supply system 600 will be described.

  FIG. 9 is a table for explaining a third operation example of the redundant power supply system according to the first embodiment of the present invention. Here, the redundant power supply system 600 includes four power supply devices 100 (P1, P2, P3, and P4), and the power supply device 100 configures a 2 + 2 redundant power supply. In FIG. 9, the first column indicates the timing at which each voltage drop test is performed, and the second to fifth columns cause the power supply devices 100 (P1, P2, P3, and P4) to drop the voltage in each voltage drop test. It indicates whether it is possible (Yes) or not (No). Also, in FIG. 9, the sixth column shows whether or not the series of voltage drop tests failed (NG), and the seventh column shows the power supply apparatus 100 that was confirmed as a result of the voltage drop test. .

  Since the power supply apparatus 100 constitutes a 2 + 2 redundant power supply, the combination of the power supply apparatus 100 required to operate the load 300 is any combination of two.

  At timing T1, the power supply devices P1 and P2 are voltage-dropped, and the other power supply devices P3 and P4 are not voltage-dropped. At this time, the alarm signal Valarm was not output. Therefore, the power supply devices P3 and P4 are normal.

  At timing T2, the power supply devices P2 and P3 are voltage-dropped, and the other power supply devices P1 and P4 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, one of the power supply devices P1 and P4 has failed.

  At timing T3, the power supply devices P3 and P4 are voltage-dropped, and the other power supply devices P1 and P2 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, one of the power supply devices P1 and P2 has failed.

  At timing T4, the power supply devices P1 and P4 are voltage-dropped, and the other power supply devices P2 and P3 are not voltage-dropped. At this time, the alarm signal Valarm was not output. Therefore, the power supply devices P2 and P3 are normal.

  At timing T5, the power supply devices P2 and P4 are voltage-dropped, and the other power supply devices P1 and P3 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, one of the power supply devices P1 and P3 has failed.

  At timing T6, the power supply devices P1 and P3 are voltage-dropped, and the other power supply devices P2 and P4 are not voltage-dropped. At this time, the alarm signal Valarm was not output. Therefore, the power supply devices P2 and P4 are normal.

  As a result of the voltage drop test at timings T1 to T6, it is output that the power supply device P1 has failed and the power supply devices P2, P3 and P4 are normal.

As described above, in the redundant power supply system 600 according to the present embodiment, all the power supplies not included in each combination for each combination in all the combinations of the power supply devices 100 that are the minimum required to operate the load 300. In the device 100, a voltage drop test is started to reduce the absolute value of the output voltage value Vr from the current voltage. Then, the redundant power supply system 600 cancels the started voltage drop test when the absolute value of the load-side voltage value Vout becomes less than or equal to the absolute value of the predetermined reference voltage value Vref. Here, since the reference voltage value Vref is a voltage whose absolute value is lower than the rated voltage for operating the load 300 and the load 300 can be operated, the load 300 can continue its operation. Then, when the absolute value of the load-side voltage value Vout becomes equal to or less than the absolute value of the predetermined reference voltage value Vref, the redundant power supply system 600 lowers the absolute value of the output voltage value Vr in the voltage drop test. It is determined that one of the power supply devices 100 is broken. On the other hand, if the absolute value of load-side voltage value Vout does not fall below the absolute value of predetermined reference voltage value Vref, redundant power supply system 600 reduces the absolute value of output voltage value Vr in the voltage drop test. It is determined that the power supply apparatus 100 which has not been failed has not failed. Therefore, the redundant power supply system 600 of the present embodiment has an effect that it is possible to inspect a failure in the power supply apparatus included in the redundant power supply system at the time of operation of the redundant power supply system.
Second Embodiment
Next, a second embodiment of the present invention will be described, based on the first embodiment of the present invention. In the redundant power supply system according to the present embodiment, in addition to the voltage drop test, an output stop test is also performed. Also, the test execution device is a BMC, the load includes a BMC and a server, and the input power is alternating current. Further, in the present embodiment, the internal configuration and operation of the power supply device will be described in more detail.

  The configuration in the present embodiment will be described.

  FIG. 10 is a block diagram showing an example of the configuration of a redundant power supply system according to the second embodiment of the present invention.

  The redundant power supply system 605 according to the present embodiment includes a plurality of power supply devices 105 and a load 305.

  The plurality of power supply devices 105 are connected in parallel to the load 305. The plurality of power supply devices 105 are centralized power supplies that form a redundant configuration (for example, an n + m redundant configuration) with respect to the load 305.

  The load 305 includes one BMC 515 operable by a plurality of power supply apparatuses 105 and one or more servers 410.

  The BMC 515 causes the power supply device 105 to execute a brownout test. The power supply device 105, the BMC 515, and the server 410 are connected to one another in accordance with the IPMI standard (Intelligent Platform Management Interface standard). Here, the IPMI standard is extended so as to be able to transmit and receive a start signal of a voltage drop test and a signal as a result of the voltage drop test.

  The BMC 515 includes a test execution unit 505.

  For example, the test execution unit 505 designates an address A of a certain power supply apparatus 105, and transmits a control signal indicating a start command “D0h” (hexadecimal notation) of a voltage drop test. Then, the test execution unit 505 designates the address A of the power supply device 105, and transmits a control signal representing the result acquisition command “D1 h” (hexadecimal notation) of the result of the voltage drop test. Then, the power supply apparatus 105 sends to the test execution unit 505 a response “0b” (binary notation) indicating that the voltage drop test is successful or a response “1b” (binary number) indicating that the voltage drop test has failed. Send (inscription).

  FIG. 11 is a block diagram showing an example of the configuration of the power supply device according to the second embodiment of the present invention.

  The power supply device 105 includes an A / D conversion unit 115, an Oring-FET 125, an Oring control unit 126, a comparator 140, and an MCU (Micro Controller Unit) 156.

  The A / D conversion unit 115 converts the input power 200 (here, AC power) into DC power having an output voltage value Vr.

  The Oring-FET 125 and the Oring control unit 126 supply the DC power converted by the A / D conversion unit 115 to the load 305 and prevent backflow of the DC power on the load 305 side of the power supply device 105.

  The MCU 156 includes a test control unit 155. The MCU 156 is, for example, a microprocessor. The MCU 156 may include a plurality of microprocessors.

  The test control unit 155 controls the A / D conversion unit 115 based on the test control signal from the BMC 515 and the alarm signal Valarm from the comparator 140.

  The test control unit 155 includes the function of the test control unit 150 in the first embodiment of the present invention.

  An output stop test in which the test control unit 155 shuts down the input power 200 or sets the absolute value of the output voltage value Vr to a voltage value sufficiently lower than the absolute value of the voltage at which the load 305 can not operate. Is also feasible.

  The test execution unit 505 includes the function of the test execution unit 500 in the first embodiment of the present invention.

  The test execution unit 505 executes the output stop test when the voltage drop test is successful. Here, the test execution unit 505 executes an output stop test corresponding to each voltage drop test after the success of each voltage drop test. Alternatively, the test execution unit 505 may collectively perform the output stop test corresponding to each successful voltage drop test after the execution of all the voltage drop tests. Some functions of the test execution unit 505 may be implemented as the test tool 400 on the server 410.

  The other configurations in the present embodiment are the same as the configurations in the first embodiment of the present invention.

  A configuration example of the power supply device in the present embodiment will be described.

  FIG. 12 is a block diagram showing a first configuration example of the power supply device in the second embodiment of the present invention.

  In the power supply device 107 in this configuration example, the A / D conversion unit 115 includes an AC switch 190, an EMI filter (Electro Magnetic Interference filter) 180, a bridge diode 170, and a PFC unit (Power Factor Correction unit) 160. And D / D conversion unit 117.

  The AC switch 190 switches the presence or absence of the input of the input power 200 to the power supply device 107.

  The EMI filter 180 is a filter circuit for eliminating electromagnetic interference.

  The bridge diode 170 is a rectifier circuit (diode bridge) that allows current to flow only to either positive or negative.

  The PFC unit 160 is a circuit (power factor improvement circuit) for bringing the power factor of the power supply close to one.

  The D / D conversion unit 117 converts the input DC power into DC power having a predetermined voltage. Note that a smoothing circuit (Rectifier) may be inserted downstream of the D / D conversion unit 117.

  In the power supply device 107, the MCU 156 includes a primary MCU 157 and a secondary MCU 158. The primary MCU 157 and the secondary MCU 158 are separated in order to electrically isolate the input side and the output side of the power supply device 107, and communicate with each other using optical signals. Here, it is assumed that the secondary MCU 158 receives the alarm signal Valarm from the comparator 140 and transmits it to the primary MCU 157. Then, it is assumed that the function of the other MCU 156 is possessed by the primary MCU 157. However, this function sharing is only an example, and other function sharing may be performed.

  The primary MCU 157 controls the D / D conversion unit 117 so as to reduce the absolute value of the output voltage value Vr during the voltage drop test (Slow_down signal). Further, the primary MCU 157 controls the AC switch 190 so as to cut off the input power 200 at the time of the output stop test (AC_ON / OFF signal).

  FIG. 13 is a block diagram showing a second configuration example of the power supply device in the second embodiment of the present invention.

  In the power supply device 109 in this configuration example, the A / D conversion unit 115 includes the EMI filter 180, the bridge diode 170, the PFC control unit 168, the PFC-FET 169, the reactance 165, the diode 166, and the capacitor 167. , D / D conversion unit 117.

  The PFC control unit 168 and the PFC-FET 169 are power factor correction circuits.

  The reactance 165, the diode 166, and the capacitor 167 constitute a boost circuit, and boosts a variable input voltage (for example, 100 to 240 volts) to a constant voltage (for example, 400 volts) regardless of the input voltage. Do.

  In the power supply device 109, the MCU 156 includes a primary MCU 159 and a secondary MCU 158.

  The primary MCU 159 controls the D / D conversion unit 117 to reduce the absolute value of the output voltage value Vr in the voltage drop test (feedback signal). In addition, the primary MCU 157 stops the operation of the PFC control unit 168 at the time of the output stop test (the absolute value of the output voltage value Vr is compared to the absolute value of the voltage at which the load 305 can not be operated). The PFC control unit 168 is controlled to set a sufficiently low voltage value (PFC_ON / OFF signal). Here, in many implementations of the PFC control unit 168, stopping the PFC control unit 168 is sufficient to compare the absolute value of the output voltage value Vr with the absolute value of the voltage at which the load 305 can not operate. Cause low voltage value.

  In this configuration example, even if it is difficult to add the AC switch 190 to the power supply device 105 due to hardware reasons, the function corresponding to the power supply device 107 can be realized by software.

  The other configurations in this configuration example are the same as the first configuration example.

  The operation in this embodiment will be described.

  Regarding the voltage drop test, the operation in the present embodiment is the same as the operation in the first embodiment of the present invention.

  The redundant power supply system 605 performs the output stop test if the brownout test is successful. In the output stop test, the power supply device 105 to be tested is completely stopped electrically or almost completely stopped electrically. Then, when the output stop test is finished, the power supply device 105 to be tested operates again. That is, the output stop test corresponds to hot-line insertion and removal of the power supply apparatus 105 except for physical insertion and removal.

  The other operations in this embodiment are the same as those in the first embodiment of the present invention.

  As described above, in the redundant power supply system 605 according to the present embodiment, all the power supplies not included in each combination for each combination in all the combinations of the power supply apparatuses 105 necessary for operating the load 305 are all included. In the device 105, a voltage drop test is started to reduce the absolute value of the output voltage value Vr from the current voltage. Then, when the absolute value of the load side voltage value Vout becomes equal to or less than the absolute value of the predetermined reference voltage value Vref, the redundant power supply system 605 cancels the started voltage drop test. Here, since the reference voltage value Vref is a voltage whose absolute value is lower than the rated voltage for operating the load 305 and the load 305 can be operated, the load 305 can continue operation. Then, when the absolute value of the load-side voltage value Vout becomes less than or equal to the absolute value of the predetermined reference voltage value Vref, the redundant power supply system 605 reduces the absolute value of the output voltage value Vr in the voltage drop test. It is determined that one of the power supply devices 105 is broken. On the other hand, when the absolute value of the load-side voltage value Vout does not fall below the absolute value of the predetermined reference voltage value Vref, the redundant power supply system 605 reduces the absolute value of the output voltage value Vr in the voltage drop test. It is determined that the power supply device 105 which has not been received has not failed. Therefore, the redundant power supply system 605 of this embodiment has an effect that it is possible to inspect a failure in the power supply apparatus included in the redundant power supply system at the time of operation of the redundant power supply system.

  In addition, the redundant power supply system 605 according to this embodiment executes the output stop test when the voltage drop test is successful. The output stop test corresponds to hot-line insertion and removal of the power supply apparatus 105 except for physical insertion and removal. Therefore, the redundant power supply system 605 according to the present embodiment has an effect that it is possible to execute a test corresponding to the hot-line insertion and removal of the power supply apparatus included in the redundant power supply system except the physical insertion and removal during the operation of the redundant power supply system. is there.

  FIG. 14 is a block diagram showing an example of a hardware configuration that can realize the power supply device, the test execution device, the server, or the BMC in each embodiment of the present invention.

  The power supply unit (or test execution unit, server or BMC) 907 includes a storage unit 902, a central processing unit (CPU) 903, a keyboard 904, a monitor 905, and an input / output (I / O) unit 908. , Which are connected by an internal bus 906. The storage device 902 stores operation programs of the CPU 903 such as the test control units 150 and 155, the test execution units 500 and 505, and the test tool 400. The CPU 903 controls the whole of the power supply apparatus (the test execution apparatus, the server, or the BMC), executes an operation program stored in the storage apparatus 902, and controls the test control units 150 and 155 by the I / O apparatus 908. It executes programs such as the test execution units 500 and 505, the test tool 400, and transmits and receives data. Note that the internal configuration of the above-described power supply apparatus (or test execution apparatus, server, or BMC) 907 is an example. The power supply device (or the test execution device, the server, or the BMC) 907 may have a device configuration that connects the keyboard 904 and the monitor 905 as necessary.

  The power supply device (a test execution device, server, or BMC) 907 in each embodiment of the present invention described above may be realized by a dedicated device, but the I / O device 908 executes communication with the outside. Other than the hardware operation, it can be realized by a computer (information processing apparatus). In each embodiment of the present invention, the I / O device 908 is, for example, an input / output unit with a power supply device (a test execution device, a server, or BMC) 907 or the like. In this case, the computer reads the software program stored in the storage device 902 to the CPU 903 and causes the CPU 903 to execute the read software program. In the case of each embodiment described above, the functions of the respective units of the power supply device 907 or the test execution device 907 shown in FIG. 1, FIG. 2, FIG. 10 and FIG. It only needs to have a feasible description. However, it is also assumed that these parts include hardware as appropriate. And, in such a case, such software program (computer program) can be understood to constitute the present invention. Furthermore, a computer readable storage medium storing such a software program can be considered to constitute the present invention.

  The present invention has been described above exemplarily by the above-described embodiments and the modifications thereof. However, the technical scope of the present invention is not limited to the scope described in the above-described embodiments and the modifications thereof. It will be apparent to those skilled in the art that various changes or modifications can be made to such embodiments. In such a case, new embodiments added with such changes or improvements can also be included in the technical scope of the present invention. And this is clear from the matter described in the claim.

Some or all of the above embodiments may be described as in the following appendices, but is not limited to the following.
(Supplementary Note 1)
A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
Starting the voltage drop control for causing the stabilized power supply unit to reduce the absolute value of the output voltage value from the current voltage when receiving a start signal of the voltage drop test;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
Test control means for transmitting a signal indicating the result of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control, and a plurality of powers connected in parallel with each other For each combination in all combinations of the supply device and the minimum required power supply device for operating the load, the start signal of the brownout test is applied to all the power supply devices not included in each combination. Transmitting, receiving the result signal of the voltage drop test according to the start signal of the voltage drop test transmitted from all the power supply devices not included in each combination;
The redundant power supply system provided with the test execution apparatus which outputs the result of the said voltage-drop test based on the received result signal of the said voltage-drop test.
(Supplementary Note 2)
When the redundant power supply system forms an n + m redundant configuration (n and m are natural numbers) with respect to the load and the power supply device, the test execution device is configured to at least the power supply device required to operate the load. The redundant power supply system according to appendix 1, wherein the number is n.
(Supplementary Note 3)
An output stop test in which the test control means shuts off the input power or sets an absolute value of the output voltage value to a voltage value sufficiently lower than an absolute value of a voltage at which the load can not operate. The redundant power supply system according to claim 1 or 2, which can be implemented.
(Supplementary Note 4)
The redundant power supply system according to claim 3, wherein the test execution device executes the output stop test when the alarm signal is not output.
(Supplementary Note 5)
The test control means controls the stabilization power supply unit until the voltage drop control is actually effective even when the voltage drop control is stopped even when the voltage drop control is stopped. The redundant power supply system according to any one of appendices 1 to 4, wherein the load is gradually lowered within a range in which the load can normally operate.
(Supplementary Note 6)
A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
Starting the voltage drop control for causing the stabilized power supply unit to reduce the absolute value of the output voltage value from the current voltage when receiving a start signal of the voltage drop test;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
And a test control means for transmitting a result signal of the voltage drop test indicating whether the alarm signal is output during the voltage drop control.
(Appendix 7)
A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
Starting the voltage drop control for causing the stabilized power supply unit to gradually reduce the absolute value of the output voltage value from the current voltage when the start signal of the voltage drop test is received;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
Test control means for transmitting a signal indicating the result of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control, and a plurality of powers connected in parallel with each other Connected to the feeder,
The start signal of the brownout test is transmitted and transmitted to all the power supply devices not included in each combination, for each combination of all the combinations of the power supply devices required to operate the load. Receiving the result signal of the voltage drop test according to the start signal of the voltage drop test from all the power supply devices not included in each combination;
A test execution device which outputs the result of the voltage drop test based on the received result signal of the voltage drop test.
(Supplementary Note 8)
A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
And a test control method for testing the power supply devices in a redundant power supply system including a plurality of power supply devices connected in parallel with each other and test control means,
By the power supply device
Starting the voltage drop control for causing the stabilized power supply unit to reduce the absolute value of the output voltage value from the current voltage when receiving a start signal of the voltage drop test;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
Transmitting a signal indicating the result of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control;
By the test execution device,
The start signal of the brownout test is transmitted and transmitted to all the power supply devices not included in each combination, for each combination of all the combinations of the power supply devices required to operate the load. Receiving the result signal of the voltage drop test according to the start signal of the voltage drop test from all the power supply devices not included in each combination;
And a step of outputting the result of the voltage drop test based on the received result signal of the voltage drop test.
(Appendix 9)
A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
A plurality of power supply devices connected in parallel to each other including test control means, and a computer provided in the power supply device in a redundant power supply system including a test execution device,
Starting the voltage drop control for causing the stabilized power supply unit to reduce the absolute value of the output voltage value from the current voltage when receiving a start signal of the voltage drop test;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
A test program of a power supply device for executing a test control process of: transmitting a result signal of the voltage drop test indicating whether the alarm signal is output during the voltage drop control.
(Supplementary Note 10)
A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
A plurality of power supply devices connected in parallel with one another including test control means, and a computer provided in the test execution device in a redundant power supply system including a test execution device,
The start signal of the brownout test is transmitted and transmitted to all the power supply devices not included in each combination for each combination of all the combinations of the power supply devices necessary for operating the load. Receiving the result signal of the voltage drop test according to the start signal of the voltage drop test from all the power supply devices not included in each combination;
A test program of a test execution device that executes processing for outputting the result of the voltage drop test based on the received result signal of the voltage drop test.
(Supplementary Note 11)
The redundant power supply system according to any one of appendices 1 to 5, wherein the test execution device is any one of the plurality of power supply devices.
(Supplementary Note 12)
The redundant power supply system according to any one of appendices 1 to 5, wherein the test execution device is included in the load.
(Supplementary Note 13)
The test execution device is a BMC (Baseboard Management Controller),
The power supply device and the test execution device are connected to each other in accordance with the IPMI standard (Intelligent Platform Management Interface standard),
The redundant power supply system according to any one of appendices 1 to 5, wherein the IPMI standard is extended so as to be able to transmit / receive the start signal of the voltage drop test and the result signal of the voltage drop test.
(Supplementary Note 14)
The redundant power supply system is configured to generate one or more combinations of all the combinations in the brownout test.
When the alarm signal is output, it is determined that any one of the power supply devices whose absolute value of the output voltage value has been reduced in the voltage drop test has failed.
If any of the power supply devices whose absolute value of the output voltage value has not been reduced in the voltage drop test is determined not to have failed if the alarm signal is not output Redundant power supply system according to item 1.
(Supplementary Note 15)
In the case where the redundant power supply system forms an n + m redundant configuration (n and m are natural numbers) with respect to the load and the power supply device, the number of the power supply devices at least required to operate the load is the n The test method of the electric power supply apparatus of Additional remark 8.

  The present invention can be used in applications that provide power to electrical devices.

100, 105, 107, 109 Power supply device 110 Stabilized power supply unit 115 A / D conversion unit 117 D / D conversion unit 120 Backflow prevention unit 125 Oring-FET
126 Oring control unit 130 Reference voltage value 140 Comparator 150, 155 Test control unit 156 MCU
157, 159 Primary MCU
158 Secondary MCU
160 PFC section 165 reactance 166 diode 167 capacitor 168 PFC control section 169 PFC-FET
170 bridge diode 180 EMI filter 190 AC switch 200 input power 300, 305 load 400 test tool 410 server 500, 505 test execution unit 515 BMC
510 Test Execution Unit 600, 605 Redundant Power Supply System 902 Storage Unit 903 CPU
904 keyboard 905 monitor 906 internal bus 907 power supply device, test execution device, server, BMC
908 I / O device

Claims (10)

A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
Starting the voltage drop control for causing the stabilized power supply unit to reduce the absolute value of the output voltage value from the current voltage when receiving a start signal of the voltage drop test;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
Test control means for transmitting a signal indicating the result of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control, and a plurality of powers connected in parallel with each other For each combination in all combinations of the supply device and the minimum required power supply device for operating the load, the start signal of the brownout test is applied to all the power supply devices not included in each combination. Transmitting, receiving the result signal of the voltage drop test according to the start signal of the voltage drop test transmitted from all the power supply devices not included in each combination;
The redundant power supply system provided with the test execution apparatus which outputs the result of the said voltage-drop test based on the received result signal of the said voltage-drop test. When the redundant power supply system forms an n + m redundant configuration (n and m are natural numbers) with respect to the load and the power supply device, the test execution device is configured to at least the power supply device required to operate the load. The redundant power supply system according to claim 1, wherein the number is n. An output stop test in which the test control means shuts off the input power or sets an absolute value of the output voltage value to a voltage value sufficiently lower than an absolute value of a voltage at which the load can not operate. The redundant power supply system according to claim 1 or 2, wherein The redundant power supply system according to claim 3, wherein the test execution device executes the output stop test when the alarm signal is not output. The test control means controls the stabilization power supply unit until the voltage drop control is actually effective even when the voltage drop control is stopped even when the voltage drop control is stopped. The redundant power supply system according to any one of claims 1 to 4, wherein the load is gradually lowered within a range in which the load can normally operate. A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
Starting the voltage drop control for causing the stabilized power supply unit to reduce the absolute value of the output voltage value from the current voltage when receiving a start signal of the voltage drop test;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
And a test control means for transmitting a result signal of the voltage drop test indicating whether the alarm signal is output during the voltage drop control. A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
Starting the voltage drop control for causing the stabilized power supply unit to gradually reduce the absolute value of the output voltage value from the current voltage when the start signal of the voltage drop test is received;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
Test control means for transmitting a signal indicating the result of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control, and a plurality of powers connected in parallel with each other Connected to the feeder,
The start signal of the brownout test is transmitted and transmitted to all the power supply devices not included in each combination, for each combination of all the combinations of the power supply devices required to operate the load. Receiving the result signal of the voltage drop test according to the start signal of the voltage drop test from all the power supply devices not included in each combination;
A test execution device which outputs the result of the voltage drop test based on the received result signal of the voltage drop test. A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
And a test control method for testing the power supply devices in a redundant power supply system including a plurality of power supply devices connected in parallel with each other and test control means,
By the power supply device
Starting the voltage drop control for causing the stabilized power supply unit to reduce the absolute value of the output voltage value from the current voltage when receiving a start signal of the voltage drop test;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
Transmitting a signal indicating the result of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control;
By the test execution device,
The start signal of the brownout test is transmitted and transmitted to all the power supply devices not included in each combination, for each combination of all the combinations of the power supply devices required to operate the load. Receiving the result signal of the voltage drop test according to the start signal of the voltage drop test from all the power supply devices not included in each combination;
And a step of outputting the result of the voltage drop test based on the received result signal of the voltage drop test. A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
A plurality of power supply devices connected in parallel to each other including test control means, and a computer provided in the power supply device in a redundant power supply system including a test execution device,
Starting the voltage drop control for causing the stabilized power supply unit to reduce the absolute value of the output voltage value from the current voltage when receiving a start signal of the voltage drop test;
When the alarm signal is output by the comparator, or when it is considered that the absolute value of the output voltage value has reached a voltage at which the load can not be operated, the voltage drop control is stopped. And
A test program of a power supply device for executing a test control process of: transmitting a result signal of the voltage drop test indicating whether the alarm signal is output during the voltage drop control. A stabilized power supply unit for converting input power into DC power having an output voltage value;
A backflow prevention unit that supplies DC power converted by the stabilized power supply unit to a load and prevents backflow of DC power on the side of the load;
The absolute value of the load-side voltage value on the load side of the backflow prevention unit has an absolute value lower than the rated voltage for operating the load and an absolute value of a predetermined reference voltage value capable of operating the load A comparator that outputs an alarm signal if it is less than or equal to the value;
A plurality of power supply devices connected in parallel with one another including test control means, and a computer provided in the test execution device in a redundant power supply system including a test execution device,
The start signal of the brownout test is transmitted and transmitted to all the power supply devices not included in each combination for each combination of all the combinations of the power supply devices necessary for operating the load. Receiving the result signal of the voltage drop test according to the start signal of the voltage drop test from all the power supply devices not included in each combination;
A test program of a test execution device that executes processing for outputting the result of the voltage drop test based on the received result signal of the voltage drop test.

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