JP6970009B2 - Redundant power supply system, power supply device, test execution device, test method, and test program - Google Patents

Description

The present invention relates to a technique for supplying electric power to an electric device.

In the present specification, a power source for supplying electric power to a load (the whole of one or more electric devices) by a plurality of electric power supply devices (power supply units) is referred to as a "centralized power source".

Compared to the case where a separate power supply is prepared for each electric device, the centralized power supply can reduce the number of power supply devices by power leveling and increase the conversion efficiency of output power to input power. It has the effect of being able to do it.

The centralized power supply often has a configuration of "n + m redundant power supply" (hereinafter, also simply referred to as "redundant power supply") in order to improve the fault tolerance against failure in each power supply device. In the present specification, the n + m redundant power supply means that when at least n (n: natural number) power supply devices are required for load operation, the load is normally loaded by n + m (m: natural number) power supply devices. When 1 to m of the n + m power supply devices fail, the load is operated by the non-failed power supply device of the n + m power supply devices. The n + m redundant power supply is customarily referred to as "n + n redundant power supply", but in the present specification, it is referred to as n + m redundant power supply.

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

Patent Document 1 discloses an example of a power supply technology having a backflow prevention mechanism. The power supply redundancy circuit of Patent Document 1 is a power supply redundancy 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 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 wraparound current from other power supplies connected in parallel.

Japanese Unexamined Patent Publication No. 2010-220304

For example, a case where 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 redundancy circuit of Patent Document 1, if neither of the two power supply units has failed 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 the power supplied, the same power as before the failure occurred is supplied. That is, in the power supply redundant circuit of Patent Document 1, even if one of the power supply units of the two power supply units fails, the load can be operated normally. However, in the power supply redundancy circuit of Patent Document 1, if only one of the two power supply units fails at first, and if the other power supply unit fails in the middle, the same power as before the failure occurs in the other power supply unit. Cannot be supplied. That is, in the power supply redundant circuit of Patent Document 1, if both of the two power supply units fail, the load cannot be operated normally.

Even if each power supply unit is not completely out of order at first and is operating normally at first glance, the power supply redundancy circuit of Patent Document 1 may not be able to operate the load normally on the way. For example, first, one of the two power supply units can supply 50% or less of the power required for the operation of the load, but supplies more than 50% of the power required for the operation of the load. It shall have an impossible failure (partial failure). Further, it is assumed that the other power supply unit does not have a failure at first. In this case, first, each power supply unit can supply 50% of the power required for the operation of the load, so that the power supply redundant circuit can operate the load normally. However, if the power supply unit that did not have the failure first fails on the way, the power supply unit with the partial failure cannot supply 100% of the power required for the operation of the load, so that the power supply redundancy circuit loads the load. It cannot be operated normally.

Usually, it is difficult to diagnose such a partial failure during the 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 the failure when the power supply unit is not operating. Inspecting the power supply unit (power supply device) at an appropriate frequency during non-operation has a problem of reducing service usability and increasing maintenance man-hours.

The present invention has been made in view of the above problems, and an object of the present invention is to inspect a failure in a power supply device included in a redundant power supply system during operation of the redundant power supply system.

In one aspect of the present invention, the redundant power supply system supplies a stabilized power supply unit that converts input power into a DC power having an output voltage value, and a DC power converted by the stabilized power supply unit, and loads the load. The absolute value of the backflow prevention part that prevents the backflow of DC power on the side of the load and the absolute value of the load side voltage value on the load side of the backflow prevention part is lower than the rated voltage for operating the load and the load is operated. A comparator that outputs an alarm signal when it is less than or equal to the absolute value of a predetermined reference voltage value that can be used, and the current absolute value of the output voltage value to the stabilized power supply unit when the start signal of the voltage drop test is received. It is considered that when the voltage drop control to drop the voltage from the voltage is started and the alarm signal is output by the comparator, or the absolute value of the output voltage value reaches the voltage at which the load cannot be operated. At that time, it includes a test control means for stopping the voltage drop control and transmitting a voltage drop test result signal indicating whether or not an alarm signal is output during the voltage drop control. For each combination of multiple power supply devices connected in parallel to each other and all combinations of the minimum power supply devices required to operate the load, the voltage drops to all the power supply devices not included in each combination. The test start signal is transmitted, and the 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 the received voltage drop test result signal is received. A test execution device that outputs the result of the voltage drop test based on the above is provided.

In one aspect of the present invention, the power supply device supplies a stabilized power supply unit that converts input power into DC power having an output voltage value, and a DC power converted by the stabilized power supply unit to the load, and also loads the load. The absolute value of the backflow prevention part that prevents the backflow of DC power on the side of the load and the absolute value of the load side voltage value on the load side of the backflow prevention part is lower than the rated voltage for operating the load and the load is operated. A comparator that outputs an alarm signal when it is less than or equal to the absolute value of a predetermined reference voltage value that can be used, and the current absolute value of the output voltage value to the stabilized power supply unit when the start signal of the voltage drop test is received. It is considered that when the voltage drop control to drop the voltage from the voltage is started and the alarm signal is output by the comparator, or the absolute value of the output voltage value reaches the voltage at which the load cannot be operated. At that time, it is provided with a test control means for stopping the voltage drop control and transmitting the result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control.

In one aspect of the present invention, the test execution device supplies a stabilized power supply unit that converts an input power into a DC power having an output voltage value, and a DC power converted by the stabilized power supply unit, and loads the load. The absolute value of the backflow prevention part that prevents the backflow of DC power on the side of the load and the absolute value of the load side voltage value on the load side of the backflow prevention part is lower than the rated voltage for operating the load and the load is operated. A comparator that outputs an alarm signal when it is less than or equal to the absolute value of a predetermined reference voltage value that can be used, and the current absolute value of the output voltage value to the stabilized power supply unit when the start signal of the voltage drop test is received. It is considered that the voltage drop control that gradually drops from the voltage of A test control means for stopping the voltage drop control and transmitting a voltage drop test result signal indicating whether or not an alarm signal was output during the voltage drop control. All power supplies not included in each combination for each combination of all combinations of power supply devices that are connected to multiple power supply devices that are connected in parallel to each other and that are the minimum required to operate the load. The voltage drop test start signal is transmitted to the device, and the 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 the received voltage drop is received. Test result Outputs the voltage drop test result based on the signal.

In one aspect of the present invention, the test method of the power supply device supplies a stabilized power supply unit that converts input power into DC power having an output voltage value, and a DC power converted by the stabilized power supply unit to the load. At the same time, the absolute value of the backflow prevention unit that prevents the backflow of DC power on the load side and the load side voltage value on the load side of the backflow prevention unit is lower than the rated voltage for operating the load and the load. A plurality of power supply devices connected in parallel to each other, including a comparator that outputs an alarm signal when the voltage is equal to or less than an absolute value of a predetermined reference voltage value capable of operating the test control means, and a test. It is a test method of the power supply device in the redundant power supply system equipped with the execution device, and when the power supply device receives the start signal of the voltage drop test, the absolute value of the output voltage value is sent to the stabilized power supply unit at present. It was considered that when the voltage drop control to lower the voltage was started and the alarm signal was output by the comparator, or the absolute value of the output voltage value reached a voltage at which the load could not be operated. At that time, a test control procedure for stopping the voltage drop control and transmitting a voltage drop test result signal indicating whether or not an alarm signal was output during the voltage drop control, and a test execution device. By, for each combination in all combinations of the minimum required power supply devices to operate the load, a voltage drop test start signal is transmitted to all the power supply devices not included in each combination, and the transmitted voltage drop is transmitted. The voltage drop test result signal corresponding to the test start signal is received from all the power supply devices not included in each combination, and the voltage drop test result is output based on the received voltage drop test result signal.

In one aspect of the present invention, the test program of the power supply device or the non-temporary storage medium in which the test program is stored includes a stabilized power supply unit that converts input power into DC power having an output voltage value. The absolute value of the backflow prevention unit that supplies the DC power converted by the stabilized power supply unit to the load and prevents the backflow of the DC power on the load side and the load side voltage value on the load side of the backflow prevention unit is It includes a comparator that outputs an alarm signal when the absolute value is lower than the rated voltage for operating the load and is equal to or less than the absolute value of a predetermined reference voltage value capable of operating the load, and a test control means. When a voltage drop test start signal is received by a computer equipped with multiple power supply devices connected in parallel with each other and a power supply device in a redundant power supply system equipped with a test execution device, the output is output to the stabilized power supply unit. When the voltage drop control that lowers the absolute value of the voltage value from the current voltage is started and the alarm signal is output by the comparator, or the absolute value of the output voltage value is the voltage at which the load cannot be operated. When it is considered that the voltage drop control has been reached, the voltage drop control is stopped, and the result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control is transmitted. Execute the test control process.

In one aspect of the present invention, the test program of the test execution device or the non-temporary storage medium in which the test program is stored includes a stabilized power supply unit that converts input power into DC power having an output voltage value. The absolute value of the backflow prevention unit that supplies the DC power converted by the stabilized power supply unit to the load and prevents the backflow of the DC power on the load side and the load side voltage value on the load side of the backflow prevention unit is It includes a comparator that outputs an alarm signal when the absolute value is lower than the rated voltage for operating the load and is equal to or less than the absolute value of a predetermined reference voltage value capable of operating the load, and a test control means. In all combinations of the minimum required power supply devices to operate the load on the computer provided by the test execution device in the redundant power supply system equipped with multiple power supply devices connected in parallel with each other and the test execution device. For each combination, the voltage drop test start signal is transmitted to all the power supply devices not included in each combination, and the voltage drop test result signal corresponding to the transmitted voltage drop test start signal is included in each combination. It receives from all the power supply devices and outputs the result of the voltage drop test based on the received voltage drop test result signal.

According to the present invention, there is an effect that a failure in the power supply device included in the redundant power supply system can be inspected when the redundant power supply system is operated.

It is a block diagram which shows an example of the structure of the redundant power supply system in 1st Embodiment of this invention. It is a block diagram which shows an example of the structure of the power supply device in 1st Embodiment of this invention. It is a flowchart which shows the operation of the power supply device in 1st Embodiment of this invention. It is a graph 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. It is a graph explaining the operation when 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. It is a flowchart which shows the operation of the test execution apparatus in 1st Embodiment of this invention. It is a table explaining the 1st operation example of the redundant power supply system in 1st Embodiment of this invention. It is a table explaining the 2nd operation example of the redundant power supply system in 1st Embodiment of this invention. It is a table explaining the 3rd operation example of the redundant power supply system in 1st Embodiment of this invention. It is a block diagram which shows an example of the structure of the redundant power supply system in the 2nd Embodiment of this invention. It is a block diagram which shows an example of the structure of the power supply device in the 2nd Embodiment of this invention. It is a block diagram which shows the 1st structural example of the electric power supply device in 2nd Embodiment of this invention. It is a block diagram which shows the 2nd structural example of the electric power supply device in 2nd Embodiment of this invention. It is a block diagram which shows an example of the hardware composition which can realize the power supply device, the test execution device, the server, or BMC in each embodiment of this invention.

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

The configuration in this embodiment will be described.

FIG. 1 is a block diagram showing an example of the configuration of a redundant power supply system according to the 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 to each other in parallel with respect to the load 300. The plurality of power supply devices 100 are centralized power sources having a redundant configuration with respect to 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 arbitrary electrical devices that can be operated by a plurality of power supply devices 100. The electric 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 device 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 device 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 (particularly, the backflow prevention unit 120, the reference voltage value 130, and the test control unit 150) operates independently of the presence or absence of output by the power supply device 100.

The regulated 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 also prevents the backflow of the DC power on the load 300 side of the power supply device 100.

The comparator 140 outputs an 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 having an absolute value lower than the rated voltage for operating the load 300 and 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 minimum voltage value at which the load 300 can be operated.

The test control unit 150 controls the regulated power supply unit 110 based on the test control signal from the test execution device 510 and the alarm signal Valarm from the comparator 140. The test control unit 150
I) When the start signal of the voltage drop test is received, the regulated power supply unit 110 starts the voltage drop control to lower the absolute value of the output voltage value Vr from the current voltage.
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 cannot be operated, the voltage drop control is performed. To stop and
III) The result signal of the voltage drop test indicating whether or not the alarm signal Valarm was output (the voltage drop test failed) during the voltage drop control is transmitted. In the above I), the absolute value of the output voltage value Vr is a load until the cancellation of the voltage reduction control is actually effective even when the voltage reduction control is stopped in the above II). It is assumed that the 300 is gradually lowered within the range in which it can operate normally.

The test execution unit 500
IV) For each combination of all combinations of the minimum power supply device 100 required to operate the load 300
i) Send a voltage drop test start signal to all power supply devices 100 not included in each combination.
ii) The result signal of the voltage drop test corresponding to the transmitted voltage drop test start signal is received 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 voltage drop test result signal.

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. The flowchart shown in FIG. 3 and the following description are examples, and the processing order may be changed, the processing may be returned, the processing may be repeated, or the processing may be stopped in the middle, depending on the desired processing. ..

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

Next, the power supply device 100 starts the voltage drop control for lowering the absolute value of the output voltage value Vr from the current voltage with respect to the regulated power supply unit 110 (step S120).

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

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

Subsequently, the power supply device 100 stops 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 device 100 transmits a voltage drop test result signal indicating whether or not the alarm signal Valarm is output (voltage drop test failed) during the voltage drop control to the test execution device 510. do.

FIG. 4 is a graph illustrating an operation when the load side voltage value is maintained by another power supply device during a voltage drop test in the power supply device.

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

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

As shown in FIG. 4, during the voltage drop test in the power supply device 100, the load side voltage value Vout is maintained by the other power supply device 100, so that it is assumed that the output voltage value Vr becomes almost 0. Even at time t3, the alarm signal Voltage is not output.

FIG. 5 is a graph illustrating an operation when the load side voltage value is not maintained by another power supply device during a voltage drop test in the power supply device.

As shown in FIG. 5, since a certain power supply device 100 has started the voltage drop test at time t1, both the load side voltage value Vout and the output voltage value Vr are gradually lowered.

As shown in FIG. 5, since the load side voltage value Vout is not maintained by the other power supply device 100 during the voltage drop test in the power supply device 100, the load side voltage value Vout exceeds the reference voltage value Vref at time t2. , The alarm signal Voltage 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 are set to the voltage before the voltage drop test. return. Here, if the time required from the output of the alarm signal Valarm to the cancellation of the voltage drop test cannot 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 device according to the first embodiment of the present invention. The flowchart shown in FIG. 6 and the following description are examples, and the processing order may be changed, the processing may be returned, the processing may be repeated, or the processing may be stopped in the middle, depending on the desired processing. ..

First, the test execution device 510 acquires information regarding the redundant configuration of the power supply device 100 (step S210). Here, the information regarding the redundant configuration includes, for example, that the power supply device 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 to each power supply device 100. Includes the destination (address) when transmitting the start signal and the like. The electric power that can be supplied to each of the electric power supply devices 100 may be different from each other.

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

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

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

When the procedure from step S220 to immediately before step S250 is completed for all the combinations in step S220, the test execution device 510 outputs the result of the voltage drop test based on the received voltage drop test result signal. 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. It shall be successful (OK). Further, the result of the voltage drop test may include information for identifying a normal (non-failed) power supply device 100.

As described above, the redundant power supply system 600 outputs each combination in all combinations of the minimum power supply devices 100 required for operating the load 300 in all the power supply devices 100 not included in each combination. A voltage drop test is started in which the absolute value of the voltage value Vr is gradually lowered 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 600 cancels the started voltage drop test. Here, since the reference voltage value Vref is a voltage having an absolute value lower than the rated voltage for operating the load 300 and capable of operating the load 300, the load 300 can continue to operate. 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 is reduced in the absolute value of the output voltage value Vr in the voltage drop test. It is determined that any of the power supply devices 100 is out of order. Here, the detectable failure may include the above-mentioned partial failure. On the other hand, when the absolute value of the load-side voltage value Vout does not become equal to or less than the absolute value of the predetermined reference voltage value Vref, the redundant power supply system 600 reduces the absolute value of the output voltage value Vr in the voltage drop test. It is determined that the power supply device 100 that has not been failed is not out of order.

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

FIG. 7 is a table illustrating 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, P4), and the power supply device 100 constitutes a 3 + 1 redundant power supply. In FIG. 7, the first column indicates the timing at which each voltage drop test is executed, and the second to fifth columns decrease the voltage by each power supply device 100 (P1, P2, P3, P4) in each voltage drop test. Indicates whether it is (Yes) or not (No). Further, in FIG. 7, the sixth column shows whether or not a series of voltage drop tests have failed (NG), and the seventh column shows the power supply device 100 confirmed to be normal as a result of the voltage drop test. ..

Since the power supply device 100 constitutes a 3 + 1 redundant power supply, the minimum combination of the power supply devices 100 required for operating the load 300 is any combination of three units.

At the timing T1, the power supply device 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 the timing T2, the power supply device P2 is voltage-dropped, and the other power supply devices P1, P3, and P4 are not voltage-dropped. At this time, the alarm signal Valarm was output. Therefore, any one of the power supply devices P1, P3, and P4 is out of order.

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

At the timing T4, the power supply device 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, any one of the power supply devices P1, P2, and P3 is out of order.

As a result of the voltage drop test of the 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 illustrating 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, P4), and the power supply device 100 constitutes a 2 + 2 redundant power supply. In FIG. 8, the first column indicates the timing at which each voltage drop test is executed, and the second to fifth columns decrease the voltage by each power supply device 100 (P1, P2, P3, P4) in each voltage drop test. Indicates whether it is (Yes) or not (No). Further, in FIG. 8, the sixth column shows whether or not a series of voltage drop tests have failed (NG), and the seventh column shows the power supply device 100 confirmed to be normal as a result of the voltage drop test. ..

Since the power supply device 100 constitutes a 2 + 2 redundant power supply, the combination of the power supply device 100, which is the minimum required to operate the load 300, is an arbitrary combination of two units.

At the 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 the 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, any of the power supply devices P1 and P4 is out of order.

At the 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, either the power supply device P1 or P2 is out of order.

At the 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 the power supply device P2 or P3 is out of order.

At the 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, any of the power supply devices P1 and P3 is out of order.

At the 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 P2 or P4 of the power supply device is out of order.

As a result of the voltage drop test of the timings T1 to T6, it is output that the power supply devices P1 and P2 are out of order 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 illustrating 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, P4), and the power supply device 100 constitutes a 2 + 2 redundant power supply. In FIG. 9, the first column indicates the timing at which each voltage drop test is executed, and the second to fifth columns decrease the voltage by each power supply device 100 (P1, P2, P3, P4) in each voltage drop test. Indicates whether it is (Yes) or not (No). Further, in FIG. 9, the sixth column shows whether or not a series of voltage drop tests have failed (NG), and the seventh column shows the power supply device 100 confirmed to be normal as a result of the voltage drop test. ..

Since the power supply device 100 constitutes a 2 + 2 redundant power supply, the combination of the power supply device 100, which is the minimum required to operate the load 300, is an arbitrary combination of two units.

At the 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 the 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, any of the power supply devices P1 and P4 is out of order.

At the 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, either the power supply device P1 or P2 is out of order.

At the 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 the 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, any of the power supply devices P1 and P3 is out of order.

At the 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 of the 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 of the present embodiment, for each combination of all the combinations of the minimum power supply devices 100 required to operate the load 300, all the power supplies not included in each combination are supplied. In the device 100, a voltage drop test for lowering the absolute value of the output voltage value Vr from the current voltage is started. 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 cancels the started voltage drop test. Here, since the reference voltage value Vref is a voltage having an absolute value lower than the rated voltage for operating the load 300 and capable of operating the load 300, the load 300 can continue to operate. 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 is reduced in the absolute value of the output voltage value Vr in the voltage drop test. It is determined that any of the power supply devices 100 is out of order. On the other hand, when the absolute value of the load-side voltage value Vout does not become equal to or less than the absolute value of the predetermined reference voltage value Vref, the redundant power supply system 600 reduces the absolute value of the output voltage value Vr in the voltage drop test. It is determined that the power supply device 100 that has not been failed is not out of order. Therefore, the redundant power supply system 600 of the present embodiment has an effect that a failure in the power supply device included in the redundant power supply system can be inspected when the redundant power supply system is operated.
(Second embodiment)
Next, a second embodiment of the present invention based on the first embodiment of the present invention will be described. In the redundant power supply system in this embodiment, an output stop test is also executed in addition to the voltage drop test. Further, the test execution device is a BMC, the load includes the BMC and the 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 this embodiment will be described.

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

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

The plurality of power supply devices 105 are connected to each other in parallel with respect to the load 305. The plurality of power supply devices 105 are centralized power sources having a redundant configuration (for example, n + m redundant configuration) with respect to the load 305.

The load 305 includes one BMC 515 and one or more servers 410 that can be operated by a plurality of power supply devices 105.

The BMC 515 causes the power supply device 105 to perform a voltage drop test. The power supply device 105, the BMC 515, and the server 410 are connected to each other in accordance with the IPMI standard (Intelligent Platform Management Interface standard). Here, the IPMI standard is extended so that a voltage drop test start signal, a voltage drop test result signal, and the like can be transmitted and received.

The BMC 515 includes a test execution unit 505.

The test execution unit 505 specifies, for example, the address A of a certain power supply device 105, and transmits a control signal representing the start command “D0h” (hexadecimal notation) of the 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 “D1h” (hexadecimal notation) of the voltage drop test. Then, the power supply device 105 informs the test execution unit 505 of the response "0b" (binary number notation) indicating that the voltage drop test is successful or the response "1b" (binary number) indicating that the voltage drop test has failed. Notation) is sent.

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 O-ring-FET 125, an O-ring 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 O-ring-FET 125 and the O-ring control unit 126 supply the DC power converted by the A / D conversion unit 115 to the load 305 and prevent the 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 according to the first embodiment of the present invention.

The test control unit 155 cuts off 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 cannot be operated. 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 an 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 execute the output stop test corresponding to each successful voltage drop test after executing all the voltage drop tests. Some functions of the test execution unit 505 may be implemented as a test tool 400 on the server 410.

Other configurations in the present embodiment are the same as those in the first embodiment of the present invention.

An example of the configuration of the power supply device in this embodiment will be described.

FIG. 12 is a block diagram showing a first configuration example of the power supply device according to 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, a PFC unit (Power Factor Correction unit) 160, and the like. It includes a D / D conversion unit 117.

The AC switch 190 switches whether or not the input power 200 is input 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 in either positive or negative direction.

The PFC unit 160 is a circuit (power factor improving circuit) for bringing the power factor of the power supply close to 1.

The D / D conversion unit 117 converts the input DC power into DC power having a predetermined voltage. A smoothing circuit (Rectifier) may be inserted in the subsequent stage 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 insulate the input side and the output side of the power supply device 107, and communicate with each other using an optical signal. 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. The function of the other MCU 156 is assumed to be possessed by the primary MCU 157. However, this division of functions is only an example, and other divisions of functions may be made.

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 according to the second embodiment of the present invention.

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

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

The reactance 165, the diode 166, and the capacitor 167 form a booster circuit to boost 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 so as to reduce the absolute value of the output voltage value Vr during the voltage drop test (Feedback signal). Further, the primary MCU 157 stops the operation of the PFC control unit 168 during the output stop test (the absolute value of the output voltage value Vr is compared with the absolute value of the voltage at which the load 305 cannot be operated. The PFC control unit 168 is controlled (PFC_ON / OFF signal) so as to make the voltage value sufficiently low). 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 cannot be operated. Causes a low voltage value.

In this configuration example, even when 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.

Other configurations in this configuration example are the same as those in 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 executes an output stop test when the voltage drop test is successful. In the output stop test, the power supply device 105 to be tested is either completely electrically stopped or almost completely electrically stopped. Then, when the output stop test is completed, the power supply device 105 to be tested operates again. That is, the output stop test corresponds to hot-swap of the power supply device 105 except for physical insertion / removal.

Other operations in the present embodiment are the same as the operations in the first embodiment of the present invention.

As described above, in the redundant power supply system 605 of the present embodiment, for each combination in all combinations of the minimum power supply device 105 required to operate the load 305, all power supplies not included in each combination are supplied. In the device 105, a voltage drop test for lowering the absolute value of the output voltage value Vr from the current voltage is started. 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 having an absolute value lower than the rated voltage for operating the load 305 and capable of operating the load 305, the load 305 can continue to operate. 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 is reduced in the absolute value of the output voltage value Vr in the voltage drop test. It is determined that any of the power supply devices 105 is out of order. On the other hand, when the absolute value of the load-side voltage value Vout does not become equal to or less than 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 that has not been failed is not out of order. Therefore, the redundant power supply system 605 of the present embodiment has an effect that a failure in the power supply device included in the redundant power supply system can be inspected when the redundant power supply system is operated.

Further, the redundant power supply system 605 of the present embodiment executes an output stop test when the voltage drop test is successful. The output stop test corresponds to hot-swap of the power supply device 105 except for physical insertion / removal. Therefore, the redundant power supply system 605 of the present embodiment has an effect that when the redundant power supply system is operated, an inspection corresponding to hot-swap of the power supply device included in the redundant power supply system can be performed except for physical insertion / removal. be.

FIG. 14 is a block diagram showing an example of a hardware configuration capable of realizing a power supply device, a test execution device, a server, or a BMC according to each embodiment of the present invention.

The power supply device (, test execution device, server, or BMC) 907 includes a storage device 902, a CPU (Central Processing Unit) 903, a keyboard 904, a monitor 905, and an I / O (Input / Output) device 908. These are connected by an internal bus 906. The storage device 902 stores the operation programs of the CPU 903 such as the test control unit 150, 155, the test execution units 500, 505, and the test tool 400. The CPU 903 controls the entire power supply device (, test execution device, server, or BMC) 907, executes an operation program stored in the storage device 902, and is executed by the I / O device 908 in the test control unit 150, 155. It executes programs such as test execution units 500 and 505 and test tool 400, and sends and receives data. The internal configuration of the power supply device (, test execution device, server, or BMC) 907 is an example. The power supply device (, test execution device, server, or BMC) 907 may have a device configuration for connecting a keyboard 904 and a monitor 905, if necessary.

The power supply device (, 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 operation of hardware, it can also be realized by a computer (information processing device). 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 a BMC) 907 or the like. In this case, the computer reads the software program stored in the storage device 902 into the CPU 903, and executes the read software program in the CPU 903. In the case of each of the above-described embodiments, the software program includes the functions of the respective parts of the power supply device 907 or the test execution device 907 shown in FIGS. 1, 2, 10, and 11 as described above. It suffices if a feasible description is made. However, it is assumed that each of these parts includes hardware as appropriate. In such a case, the software program (computer program) can be regarded as constituting the present invention. Further, a computer-readable storage medium containing the software program can be regarded as constituting the present invention.

The present invention has been exemplified above by way of each of the above-described embodiments and modifications thereof. However, the technical scope of the present invention is not limited to the scope described in each of the above-described embodiments and modifications thereof. It will be apparent to those skilled in the art that various changes or improvements can be made to such embodiments. In such cases, new embodiments with such modifications or improvements may also be included in the technical scope of the invention. And this is clear from the matters described in the claims.

Some or all of the above embodiments may also be described, but not limited to:
(Appendix 1)
A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control for lowering the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
Power of a plurality of units connected in parallel to each other, including a test control means for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control. For each combination of the supply device and all the combinations of the power supply devices that are the minimum necessary for operating the load, the start signal of the voltage drop test is sent to all the power supply devices not included in the respective combinations. The result signal of the voltage drop test corresponding to the transmission and the transmission start signal of the voltage drop test is received from all the power supply devices not included in each of the combinations.
A redundant power supply system including a test execution device that outputs the result of the voltage drop test based on the received signal of the voltage drop test.
(Appendix 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 the minimum necessary power supply device for operating the load. The redundant power supply system according to Appendix 1, wherein the number of units is n.
(Appendix 3)
The test control means cuts off the input power or makes the absolute value of the output voltage value sufficiently lower than the absolute value of the voltage at which the load cannot be operated. The redundant power supply system according to Appendix 1 or 2, wherein the above is possible.
(Appendix 4)
The redundant power supply system according to Appendix 3, wherein the test execution device executes the output stop test when the alarm signal is not output.
(Appendix 5)
The test control means applies the absolute value of the output voltage value to the stabilized power supply unit, and even when the voltage drop control is stopped, until the voltage drop control is actually stopped. The redundant power supply system according to any one of Supplementary note 1 to 4, wherein the load is gradually reduced within a range in which the load can be normally operated.
(Appendix 6)
A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control for lowering the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
A power supply device including a test control means for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control.
(Appendix 7)
A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control that gradually lowers the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
Power of a plurality of units connected in parallel to each other, including a test control means for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control. Connected to the feeder,
For each combination of all the combinations of the power supply devices that are the minimum necessary for operating the load, the start signal of the voltage drop test is transmitted to all the power supply devices not included in each combination, and the transmission is transmitted. 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 of the combinations.
A test execution device that outputs the result of the voltage drop test based on the received signal of the voltage drop test.
(Appendix 8)
A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
A method for testing a power supply device in a redundant power supply system including a plurality of power supply devices connected in parallel to each other including a test control means and a test execution device.
By the power supply device
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control for lowering the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
A test control procedure for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control, and a test control procedure.
By the test execution device
For each combination of all the combinations of the power supply devices that are the minimum necessary for operating the load, the start signal of the voltage drop test is transmitted to all the power supply devices not included in each combination, and the transmission is transmitted. 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 of the combinations.
A test method for a power supply device, wherein the procedure for outputting the result of the voltage drop test based on the received signal of the result of the voltage drop test is performed.
(Appendix 9)
A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
A plurality of power supply devices connected in parallel to each other, including a test control means, and a computer provided with the power supply device in a redundant power supply system including a test execution device.
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control for lowering the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
A test program for a power supply device that executes a test control process for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control.
(Appendix 10)
A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
A plurality of power supply devices connected in parallel to each other, including a test control means, and a computer provided with the test execution device in a redundant power supply system including the test execution device.
For each combination of all combinations of the power supply devices that are the minimum necessary for operating the load, a voltage drop test start signal was transmitted to all the power supply devices not included in each combination. 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 of the combinations.
A test program of a test execution device that executes a process of outputting the result of the voltage drop test based on the received signal of the result of the voltage drop test.
(Appendix 11)
The redundant power supply system according to any one of Supplementary note 1 to 5, wherein the test execution device is any one of the plurality of power supply devices.
(Appendix 12)
The redundant power supply system according to any one of Supplementary note 1 to 5 included in the load.
(Appendix 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 Supplementary note 1 to 5, wherein the IPMI standard is extended so that the start signal of the voltage drop test and the result signal of the voltage drop test can be transmitted and received.
(Appendix 14)
The redundant power supply system is used for a certain combination among all the combinations in the voltage drop test.
When the alarm signal is output, it is determined in the voltage drop test that any of the power supply devices whose absolute value of the output voltage value has been lowered is out of order.
If the alarm signal is not output, any one of Supplementary note 1 to 5 for determining that the power supply device whose absolute value of the output voltage value has not been reduced in the voltage drop test is not failed. The redundant power supply system according to item 1.
(Appendix 15)
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 minimum number of power supply devices required to operate the load is set to n. The test method for the power supply device according to Appendix 8.

The present invention can be used in applications for supplying electric power to an electric device.

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 O-ring-FET
126 O-ring control unit 130 Reference voltage value 140 Comparator 150, 155 Test control unit 156 MCU
157, 159 Primary MCU
158 Secondary MCU
160 PFC part 165 Reactance 166 Diode 167 Capacitor 168 PFC control part 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 Device 600, 605 Redundant Power Supply System 902 Storage Device 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 regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control for lowering the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
Power of a plurality of units connected in parallel to each other, including a test control means for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control. For each combination of the supply device and all the combinations of the power supply devices that are the minimum necessary for operating the load, the start signal of the voltage drop test is sent to all the power supply devices not included in the respective combinations. The result signal of the voltage drop test corresponding to the transmission and the transmission start signal of the voltage drop test is received from all the power supply devices not included in each of the combinations.
A redundant power supply system including a test execution device that outputs the result of the voltage drop test based on the received signal of the 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 the minimum necessary power supply device for operating the load. The redundant power supply system according to claim 1, wherein the number of units is n. The test control means cuts off the input power or makes the absolute value of the output voltage value sufficiently lower than the absolute value of the voltage at which the load cannot be operated. The redundant power supply system according to claim 1 or 2, wherein the above is feasible. 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 applies the absolute value of the output voltage value to the stabilized power supply unit, and even when the voltage drop control is stopped, until the voltage drop control is actually stopped. The redundant power supply system according to any one of claims 1 to 4, wherein the load is gradually reduced within a range in which the load can be normally operated. A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control for lowering the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
A power supply device including a test control means for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control. A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control that gradually lowers the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
Power of a plurality of units connected in parallel to each other, including a test control means for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control. Connected to the feeder,
For each combination of all the combinations of the power supply devices that are the minimum necessary for operating the load, the start signal of the voltage drop test is transmitted to all the power supply devices not included in each combination, and the transmission is transmitted. 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 of the combinations.
A test execution device that outputs the result of the voltage drop test based on the received signal of the voltage drop test. A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
A method for testing a power supply device in a redundant power supply system including a plurality of power supply devices connected in parallel to each other including a test control means and a test execution device.
By the power supply device
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control for lowering the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
A test control procedure for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control, and a test control procedure.
By the test execution device
For each combination of all the combinations of the power supply devices that are the minimum necessary for operating the load, the start signal of the voltage drop test is transmitted to all the power supply devices not included in each combination, and the transmission is transmitted. 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 of the combinations.
A test method for a power supply device, wherein the procedure for outputting the result of the voltage drop test based on the received signal of the result of the voltage drop test is performed. A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
A plurality of power supply devices connected in parallel to each other, including a test control means, and a computer provided with the power supply device in a redundant power supply system including a test execution device.
When the start signal of the voltage drop test is received, the regulated power supply unit starts the voltage drop control for lowering the absolute value of the output voltage value from the current voltage.
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 cannot be operated, the voltage drop control is stopped. To do and
A test program for a power supply device that executes a test control process for transmitting a result signal of the voltage drop test indicating whether or not the alarm signal is output during the voltage drop control. A regulated power supply unit that converts input power into DC power with an output voltage value,
A backflow prevention unit that supplies DC power converted by the regulated power supply unit to the load and prevents backflow of 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 lower than the rated voltage for operating the load, and the absolute value of the predetermined reference voltage value capable of operating the load is absolute. A comparator that outputs an alarm signal when it is less than or equal to the value, and
A plurality of power supply devices connected in parallel to each other, including a test control means, and a computer provided with the test execution device in a redundant power supply system including the test execution device.
For each combination of all combinations of the power supply devices that are the minimum necessary for operating the load, a voltage drop test start signal was transmitted to all the power supply devices not included in each combination. 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 of the combinations.
A test program of a test execution device that executes a process of outputting the result of the voltage drop test based on the received signal of the result of the voltage drop test.

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