JP4586176B2 - Power supply device, electronic device, abnormality detection method and abnormality detection program - Google Patents

Description

The present invention relates to a power supply device used in a large-scale information processing system or the like, and more particularly to a power supply device that can detect an abnormality in a power supply path of the power supply device.

  Computer systems are becoming increasingly large-scale, and a system in which a plurality of computer devices are mounted at a high density, such as a blade server system, is often used for building a mission-critical business system. In order to operate such a large-scale computer system, a power supply device capable of supplying a stable voltage even at a large current is indispensable.

  When power is supplied from a power supply device to an electronic device such as a computer device, a plurality of connectors inevitably intervene on the power supply system. At that time, a problem is voltage drop (voltage drop) due to contact resistance of the connector. Particularly in recent computer devices, since the power required for operation has been lowered and the current has been increased, even if a slight voltage drop occurs due to a poor connector fitting or disconnection of a power supply cable, the computer device It tends to cause malfunction of internal logic.

  Therefore, conventionally, when power is supplied to an electronic device, the value of the output voltage at the output end of the power supply module unit and the supply voltage in the vicinity of the electronic device (especially the logic unit) are directly measured, thereby detecting a voltage drop. is doing.

  Incidentally, for example, the following technology is disclosed as a power supply device that avoids problems in the voltage system and supplies stable electric power to an electronic device. Patent Document 1 discloses a power supply circuit that compares an input voltage and an output voltage with a reference voltage, respectively, and prevents its own oscillation. Patent Document 2 discloses a power supply circuit that detects the number of times that an on / off switch and a load are in an open state and turns off the on / off switch. Patent Document 3 discloses a power supply circuit that measures the voltage of a load and detects an overvoltage associated with disconnection. Patent Document 4 discloses a power supply circuit that detects a differential voltage from a load voltage and detects an operation abnormality from the asymmetry of the differential voltage.

Japanese Patent Laid-Open No. 03-145927 Japanese Patent Laid-Open No. 10-123296 JP-A-11-225429 JP 2007-192615 A

  As described above, the number of devices mounted in the casing of an electronic device is increasing and the density is increasing. For this reason, it is already difficult to measure the supply voltage inside the electronic device. Moreover, as the number of devices increases, the types of voltages that the power supply device must supply also increase. Therefore, there are more and more objects to be measured, and it takes a lot of time to measure all of them.

  In addition, even if it is once confirmed that all the mounted products are mounted in the electronic equipment and there is no problem with the supply voltage to them, it is necessary to replace all of the mounted products again by simply replacing a part of the mounted products. It is necessary to check the supply voltage. This point is also very complicated.

  Incidentally, the above-mentioned patent documents 1 to 4 do not detect the voltage drop due to the contact resistance or the like of the connector, and thus do not solve the above problem.

  An object of the present invention is to provide a power supply device, an electronic device, an abnormality detection method, and an abnormality detection program capable of efficiently detecting a voltage drop without measuring a supply voltage inside a complicated electronic device. It is in.

In order to achieve the above object, a power supply apparatus according to the present invention is a power supply apparatus that supplies power to a load, and includes a voltage source, connection means for connecting the voltage source and the load, a voltage source, A voltage for detecting a difference value between the first voltage value at the first voltage measurement point between the connection means and the second voltage value at the second voltage measurement point between the connection means and the load. A difference detection unit, and a current value detection unit that is inserted between the voltage source and the connection unit to detect a current value between the voltage source and the load, and an appropriate range of the difference value is determined according to the current value. A voltage drop value table to be determined and a comparison operation circuit that determines that an abnormality has occurred when the difference value is outside the determined appropriate range are provided .

In order to achieve the above object, an electronic apparatus according to the present invention is characterized by operating by receiving power from the power supply device according to any one of claims 1 to 3 .

In order to achieve the above object, an abnormality detection method according to the present invention is a method for detecting the occurrence of an abnormality in a power supply device having a voltage source and connection means for connecting the voltage source and a load, A voltage measurement step of measuring a first voltage value at a first voltage measurement point between the source and the connection means and a second voltage value at a second voltage measurement point between the connection means and the load. A voltage difference detection step for detecting a difference value between the first voltage value and the second voltage value; a current value measurement step for detecting a current value between the voltage source and the load simultaneously with the voltage measurement step; An appropriate range determining step for determining an appropriate range of the difference value according to the value, and a comparison operation step for determining that an abnormality has occurred in the power supply apparatus when the difference value is outside the determined appropriate range. And

In order to achieve the above object, an abnormality detection program according to the present invention includes a voltage source, a power source including a voltage source, and a connection unit that connects the voltage source and a load. A voltage measurement process for measuring a first voltage value at a first voltage measurement point between the connection means and a second voltage value at a second voltage measurement point between the connection means and the load; A voltage difference detection process for detecting a difference value between the first voltage value and the second voltage value; a current value measurement process for detecting a current value between the voltage source and the load simultaneously with the voltage measurement process; And an appropriate range determination process for determining an appropriate range of the difference value according to the present invention and a comparison calculation process for determining that an abnormality has occurred in the power supply apparatus when the difference value is outside the determined appropriate range. To do.

  Since the present invention is configured to detect the abnormality by taking the difference between the voltages at both ends of the connecting means as described above, it is possible to easily detect the abnormality of the voltage drop. As a result, it is possible to efficiently detect a voltage drop without measuring a supply voltage inside a complicated electronic device, and an unprecedented superior power supply device, electronic device, abnormality detection method, and abnormality detection program Can be provided.

  FIG. 1 is a block diagram showing a configuration of an electronic apparatus 1 according to the first embodiment of the present invention. The power supply module 30 is connected to a load 50 such as a computer device via a connector 40 and supplies constant voltage power. The power supply control unit 20 controls the power supply module 30 to supply a correct supply voltage to the load 50. The power control unit 20 is further connected to a host control device 10 that monitors the power module 30. Here, the power supply control unit 20 and the power supply module 30 are collectively regarded as the power supply device 2.

  In addition, the connector 40 is drawn as resistance in the meaning that a voltage drop generate | occur | produces with the contact resistance of the connector 40 in FIG. In FIG. 1, only one system of power supply modules 30 monitored by the host control device 10 is depicted. However, in practice, a plurality of power supply control units 20 can be connected to the host control device 10. The power supply module 30 can be monitored.

  The power supply module 30 outputs the voltage generated by the voltage source 36 from the power supply path 35 to the load 50 via the connector 40. At that time, the sense resistor 31 is inserted on the power supply path 35 so as to be in series with the connector 40 and the load 50, and the output current detection circuit 32 measures the voltage across the sense resistor 31. The output current detection circuit 32 detects the current value of the power feeding path 35 from the resistance value of the sense resistor 31 and the voltage at both ends, and inputs the detected current value to the comparison operation circuit 21 of the power supply control unit 20. Since the method of detecting the current value with this configuration is known, explanations using mathematical formulas are omitted.

  A local voltage detection line 33 is branched from a point between the sense resistor 31 and the connector 40 and connected to the + terminal of the voltage drop value calculation circuit 34. On the other hand, the remote voltage detection line 42 is branched from a point between the connector 40 and the load 50 and connected to the negative terminal of the voltage drop value calculation circuit 34. The remote voltage detection line 42 is connected to the power supply module 30 via the connector 41. The connector 41 may be housed in the same connector housing as the connector 40 or may be a separate connector housing.

  The difference between the voltage detected by the local voltage detection line 33 and the voltage detected by the remote voltage detection line 42 means a voltage drop value generated by the contact resistance of the connector 40. The voltage drop value calculation circuit 34 detects this difference with an operational amplifier and inputs it to the comparison operation circuit 21 of the power supply control unit 20.

  The comparison operation circuit 21 determines whether or not the voltage drop value is an appropriate value from the current value detected by the output current detection circuit 32 and the voltage drop value detected by the voltage drop value calculation circuit 34. .

  FIG. 2 is a graph showing an appropriate range of the current value I detected by the output current detection circuit 32 disclosed in FIG. 1 and the voltage drop value Vd detected by the voltage drop value calculation circuit 34. The appropriate range of the voltage drop value Vd is represented by a range from the minimum value Vdmin to the maximum value Vdmax. With respect to the current value I, not only the median value Vdcnt of the appropriate range of the voltage drop value Vd but also the width of the minimum value Vdmin to the maximum value Vdmax changes linearly.

  The comparison operation circuit 21 stores the relationship shown in FIG. 2 as a voltage drop value table 22 in advance. At that time, the comparison operation circuit 21 may store the calculation formula representing the graph of FIG. 2 or may store the numerical value of the appropriate range of the voltage drop value corresponding to the current value as it is.

  FIG. 3 is a flowchart in which the operation of the comparison operation circuit 21 disclosed in FIG. 1 determines whether or not the voltage drop value is an appropriate value. Note that the operation content of each step according to the flowchart shown in FIG. 3 may be configured as software so that it is executed as a program that operates on a computer included in the comparison operation circuit 21 in advance, or hardware by analog operation or the like. You may comprise.

  When the operation is started (step S100), the comparison operation circuit 21 acquires the current value input from the output current detection circuit 32 (step S101), and acquires the voltage drop value input from the voltage drop value calculation circuit 34 (step S101). Step S102). Subsequently, the appropriate range of the voltage drop value corresponding to the current value acquired in step S101 is acquired from the voltage drop value table 22 (step S103).

  It is determined whether or not the voltage drop value acquired in step S102 is included in the appropriate range acquired in step S103 (step S104). If it is appropriate, the process returns to step S101 and the process is repeated. If not appropriate, predetermined predetermined measures are taken (step S105), and the process is terminated (step S106). The predetermined measures here include, for example, issuing an alarm, stopping the power supply to the power supply path 35, or reporting the occurrence of an abnormality in the power supply path 35 to the host controller 10.

  As a result, it is possible to recognize the occurrence of an abnormality such as abnormal heat generation at the connecting portion or occurrence of an excessive power supply drop on the power supply path, and take appropriate measures. In addition, by reporting this information to the host control device 10 and displaying it, it is possible to easily grasp the occurrence of an abnormality even in a large-scale power supply device. This contributes to improving the reliability of a large-scale electronic device in which computer devices are mounted at high density.

  Of course, in order to grasp the occurrence of the abnormality, the supply voltage inside the complicated device is not measured. In addition, since it is possible to grasp the occurrence of an abnormality for each of the mounted products in the electronic device, even if a part of the mounted product is replaced, it is supplied to all the mounted products that have not been replaced. There is no need to redo the voltage measurement.

  FIG. 4 is a block diagram showing a configuration of an electronic apparatus 201 according to the second embodiment of the present invention. Since most of the electronic device 201 has the same configuration as that of the electronic device 1 according to the first embodiment of the present invention described above, the same reference numeral is assigned to the same component, and the description thereof is omitted. To do. The only difference is the configuration for detecting the current value inside the power supply module 30. On the power supply path 35, not the sense resistor 31 but the choke coil 231 is inserted in series with the connector 40 and the load 50.

  A resistor 232 and a capacitor 233 connected in series are connected in parallel with the choke coil 231, and the output current detection circuit 32 detects the voltage across the capacitor 233. The output current detection circuit 32 detects the current value of the power feeding path 35 from the characteristic values of the choke coil 231, the resistor 232, and the capacitor 233 and the voltage across the capacitor 233, and the detected current value is supplied to the power supply control unit 20. To the comparison operation circuit 21. Since the method of detecting the current value with this configuration is known, explanations using mathematical formulas are omitted.

  By adopting this configuration, the second embodiment of the present invention can suppress the influence of high-frequency components accompanying rapid voltage and current changes in the detection of the current value. Except this point, the second embodiment is the same as the first embodiment.

  Note that the connection between the power supply module 30 and the load 50 in the present invention is not limited to the connector 40. For example, in the case of connection by a bus bar or a cable, it is possible to detect a voltage drop due to looseness of screw tightening of the bus bar or cable disconnection by applying the method of the present invention.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

  It can be used in a power supply device that supplies electric power of voltage to an electronic device. In particular, it is suitable for a large-scale electronic device in which a large number of devices are mounted at high density, or an electronic device in which there are many opportunities to insert and remove connectors on the power supply path.

It is a block diagram which shows the structure of the electronic device which concerns on the 1st Embodiment of this invention. 2 is a graph showing an appropriate range of a current value I detected by an output current detection circuit disclosed in FIG. 1 and a voltage drop value Vd detected by a voltage drop value calculation circuit; 2 is a flowchart illustrating an operation in which the comparison operation circuit disclosed in FIG. 1 determines whether or not a voltage drop value is an appropriate value. It is a block diagram which shows the structure of the electronic device which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic device 2 Power supply device 10 Host control device 20 Power supply control part 21 Comparison operation circuit 22 Voltage drop value table 30 Power supply module 31 Sense resistor 32 Output current detection circuit (current value detection means)
33 Local voltage detection line 34 Voltage drop value calculation circuit (voltage difference detection means)
35 Power supply path 36 Voltage source 40 Connector (connecting means, on power supply path)
41 Connector (Remote voltage detection line)
42 Remote voltage detection line 50 Load 201 Electronic device 231 Choke coil (impedance)
232 resistor 233 capacitor

Claims (6)

A power supply device for supplying power to a load,
A voltage source;
Connection means for connecting between the voltage source and the load;
A first voltage value at a first voltage measurement point between the voltage source and the connection means; a second voltage value at a second voltage measurement point between the connection means and the load; provided with a voltage difference detecting means for detecting a difference value,
A current value detecting means that is inserted between the voltage source and the connecting means and detects a current value between the voltage source and the load;
A voltage drop value table for determining an appropriate range of the difference value according to the current value;
A comparison operation circuit that determines that an abnormality has occurred when the difference value is outside the determined appropriate range;
Power supply unit characterized by being equipped with . The current value detection means detects a current value between the voltage source and the load by measuring a voltage across a sense resistor inserted between the voltage source and the connection means. The power supply device according to claim 1 . The current value detection unit detects a current value between the voltage source and the load by measuring a voltage across an impedance inserted between the voltage source and the connection unit. The power supply device according to claim 1 . An electronic apparatus that operates by receiving power from the power supply device according to any one of claims 1 to 3 . A method for detecting the occurrence of an abnormality in a power supply device having a voltage source and connection means for connecting the voltage source and a load,
A first voltage value at a first voltage measurement point between the voltage source and the connection means and a second voltage value at a second voltage measurement point between the connection means and the load. A voltage measurement process to be measured;
A voltage difference detection step of detecting a difference value between the first voltage value and the second voltage value;
A current value measuring step of detecting a current value between the voltage source and the load simultaneously with the voltage measuring step;
An appropriate range determining step of determining an appropriate range of the difference value according to the current value;
And a comparison operation step of determining that an abnormality has occurred in the power supply apparatus when the difference value is out of the determined appropriate range. In a power supply device having a voltage source and connection means for connecting the voltage source and a load, the computer device included in the power supply device includes
A first voltage value at a first voltage measurement point between the voltage source and the connection means and a second voltage value at a second voltage measurement point between the connection means and the load. Voltage measurement processing to measure,
A voltage difference detection process for detecting a difference value between the first voltage value and the second voltage value;
A current value measurement process for detecting a current value between the voltage source and the load simultaneously with the voltage measurement process;
An appropriate range determination process for determining an appropriate range of the difference value according to the current value;
An abnormality detection program for executing a comparison calculation process for determining that an abnormality has occurred in the power supply apparatus when the difference value is out of the determined appropriate range.

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