JP2014212634A - Simple deterioration determination method and simple deterioration determination device of power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a function of simply determining the deterioration state of a power supply device.SOLUTION: A device for a simple deterioration determination method for a power supply device includes: an information communication device that is electrically connected to an output terminal of the power supply device; a detection device that detects a voltage/current from the output terminal of the power supply device; and a communication device that is connected to the information communication device and monitors the status of the information communication device. The detection device measures a rush current of the output terminal of the power supply device when the power supply device is powered on, calculates a polynomial on the basis of the measured rush current, and transfers the calculated polynomial and the ID of the information communication device to the communication device. The communication device extracts a predetermined polynomial of the power supply device, which corresponds to the transferred ID of the information communication device, from a storage unit, calculates a difference between the extracted predetermined polynomial and transferred polynomial, generates a comparison result on the basis of the difference, and displays a comparison result.

Description

  The present invention relates to a simple degradation determination method for a power supply apparatus that supplies power to an information communication apparatus and a simple degradation determination apparatus for a power supply apparatus.

  In recent years, with the progress of the information society, one or more information communication devices are installed in many ordinary houses and offices. The information communication apparatus refers to, for example, an ONU (Optical Network Unit) and an ADSL (Asymmetric Digital Subscriber Line) modem.

  An information communication device installed in a general home or a small office is applied and connected to a power supply device (for example, an AC adapter) including a power conversion device that converts alternating current into direct current or converts alternating current into alternating current. The life of the power supply device depends on the deterioration state and the life of the components of the power supply device. Therefore, it is difficult to accurately grasp the deterioration status and life of components of the power supply device, and it is difficult to clearly understand the deterioration status and life of the power supply device.

  The components of the power supply device are composed of, for example, rectifying aluminum electrolytic capacitors, and the deterioration of the aluminum electrolytic capacitors is directly related to the deterioration of the power supply device. The deterioration of the aluminum electrolytic capacitor starts from the time when the aluminum electrolytic capacitor is manufactured. Further, the deterioration of the aluminum electrolytic capacitor occurs when the impregnated electrolytic solution permeates the sealing rubber and the internal electrolytic solution evaporates with time. When an aluminum electrolytic capacitor deteriorates, its capacitance decreases, ESR (Equivalent Series Resistance) increases, and the loss angle tangent increases. When the aluminum electrolytic capacitor is a component constituting the power supply device, the impedance from the input point or the output point of the power supply device changes and the power supply characteristics also change due to a decrease in the capacitance of the aluminum electrolytic capacitor and an increase in ESR.

  The life of the aluminum electrolytic capacitor is defined as reaching the life when the capacitance or loss tangent of the aluminum electrolytic capacitor deviates from the standard value. The life of an aluminum electrolytic capacitor is greatly affected by the usage conditions of the aluminum electrolytic capacitor. When used in a normal smoothing circuit, heat generation due to temperature and ripple current is a factor that greatly determines the lifetime. Further, in applications where high humidity and vibration are continuously applied, and applications where charging and discharging are frequently performed, it is necessary to consider the durability under the use conditions of the aluminum electrolytic capacitor (see Non-Patent Document 1).

  Information communication devices and power supply devices are often rented to users from ISPs (Internet Service Providers) and are utilized after being rented back. Conventionally, however, there is no information for determining how the power supply device is in use, and utilization is determined only by the date of manufacture of the power supply device. Therefore, even if the power supply device is in a good use state and can sufficiently withstand reuse and utilization, it has been discarded because the use state of the power supply device until the utilization decision is not known. In addition, depending on the usage conditions of the power supply device, the parts may deteriorate earlier than the expected life, and the life of the power supply device may be reached so that power cannot be normally supplied to the information communication device. There was a case of declining.

JP 05-056629 A Japanese Patent Laid-Open No. 08-223904 Japanese Patent No. 3666680

“Technical note: How to use aluminum electrolytic capacitors well”, Nippon Chemi-Con Corporation, http://www.chemi-con.co.jp/catalog/pdf/al-j/al-sepa-j/001-guide/al -technote-j-130101.pdf

  Therefore, for example, in Patent Document 1, an expected life setting circuit that corrects an expected life of a component with a signal indicating an operation state such as an ambient temperature of the component of the power supply or an output current of the power supply, and an operation time of each component A time integration circuit that integrates time, a circuit that compares the expected life of the component after correction and the integrated value of the operation time of the component, and resets the integration value of the time integration circuit to zero each time the component is replaced A reset circuit, and when the integrated value of the operating time of the component exceeds the expected life of the component corrected with the signal indicating the operating state of the component, a signal prompting the replacement of the component A component deterioration detection circuit that outputs to an information display has been proposed.

  The prior art described in Patent Document 1 is a mechanism that time-integrates the operation time of each component in the operating state of the power supply device and promotes replacement of the component when the integrated value of the operation time exceeds the expected life. However, since it is a large-sized device that is applied to a medium to large capacity device of several hundred watts to several hundred kW such as UPS (Uninterruptible Power Supply), there is a problem that it takes a large mounting space. Further, the cost per device is high, and there is a problem that it is not practical to apply to a compact and inexpensive power supply device such as an AC adapter.

  On the other hand, in Patent Literature 2 and Patent Literature 3, the means for detecting the factor that affects the deterioration of the components of the power conversion device is a factor that affects the deterioration of the power conversion device itself and the components of the power conversion device due to operation. The means for detecting the physical quantity and calculating the substantial deterioration amount calculates the actual deterioration amount of the power conversion device based on the physical quantity that causes the detected deterioration, and calculates the total actual deterioration amount. The means accumulates the calculated substantial deterioration amount to calculate the total substantial deterioration amount, and the means for storing the maintenance management information stores at least the power converter and the expected life for each component of the power conversion device. The comparison means compares the total substantial deterioration amount with the expected life, and when the display means exceeds the expected life, the life of the power conversion device and the components of the power conversion device is calculated as the life of the power conversion device. Power converter to notify the use who have been proposed.

  The prior art described in Patent Document 2 and Patent Document 3 is a mechanism for calculating the deterioration amount of the aluminum electrolytic capacitor by paying attention to the substantial deterioration amount of components such as the aluminum electrolytic capacitor in the power supply device. However, since it is necessary to measure the capacitance of the aluminum electrolytic capacitor in order to improve the accuracy, there is a problem that it may be costly to improve the accuracy of calculating the actual deterioration amount.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a function for easily determining a deterioration state of a power supply apparatus that supplies power to an information communication apparatus.

  Means for solving the above-mentioned problems are means for measuring output power characteristics (current characteristics, voltage characteristics, impedance characteristics at start-up) of the power supply apparatus (AC adapter), means for transmitting the measured signals to the center apparatus, , Means for storing the initial characteristics of the power supply device, means for comparing the initial characteristics of the power supply device with the measured characteristics, means for comparing the difference between the comparison results and the set value, and the result of the comparison is the set value It is characterized in that a means for issuing a warning when exceeding the above and a means for displaying the received warning are provided, and deterioration is easily diagnosed.

  In order to achieve such an object, the present invention provides an information communication device electrically connected to an output terminal of a power supply device and a voltage / voltage from the output terminal of the power supply device. A simple degradation determination method for a power supply device comprising: a detection device that detects a current; and a communication device that is connected to the information communication device and monitors the status of the information communication device, wherein the detection device includes: The inrush current of the output terminal of the power supply device is measured when power is turned on, a polynomial is calculated based on the measured inrush current, and the calculated polynomial and the ID of the information communication device are transferred to the communication device Then, the communication device extracts a predetermined polynomial of the power supply device corresponding to the transferred ID of the information communication device from a storage unit, and calculates a difference between the extracted predetermined polynomial and the transferred polynomial. Calculation And generates a comparison result based on said difference, and displaying the comparison result.

  As described above, according to the present invention, it is possible to easily determine the deterioration status of the power supply apparatus that supplies power to the information communication apparatus.

It is a block diagram which shows the simple degradation determination apparatus of the power supply device concerning one Embodiment of this invention. It is a figure showing the change of the inrush current, the change of voltage rising, the change of an impedance curve, the change of a current-voltage curve on the output side of the AC adapter according to an embodiment of the present invention. It is a flowchart which shows the simple degradation determination method of the power supply device concerning one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Constitution)
FIG. 1 is a block diagram showing a simple deterioration determination device for a power supply device according to an embodiment of the present invention. An AC adapter (power supply device) 1 supplies power from a commercial input to an information communication device (load device) 2. The information communication device 2 is connected to a communication NW (Network) 3 via a communication line, and the communication NW 3 is connected to a center device (communication device) 4 via a communication line. An aluminum electrolytic capacitor can be used as a component constituting the AC adapter 1.

  The communication NW 3 is connected between the information communication device 2 and the center device 4 by a communication line. In the center device 4, the communication control unit 401 receives information transmitted from the information communication device 2.

  A simple deterioration determination apparatus for a power supply device according to an embodiment of the present invention includes a polynomial that indicates a change in inrush current output from the AC adapter 1 when the AC adapter 1 is turned on, a polynomial that indicates a change in voltage rise, and an impedance. Deterioration of the AC adapter 1 by comparing the calculated result with a predetermined polynomial stored in advance, and a test apparatus (detection apparatus) 11 that calculates a polynomial indicating a curve change and a polynomial indicating a current-voltage curve change And a determination unit 41 for determining the situation. The predetermined polynomial means, for example, a polynomial that indicates a change in inrush current, a change in voltage rise, a change in impedance curve, and a change in current-voltage curve when the AC adapter is manufactured. In FIG. 1, the center apparatus 4 further includes a determination unit 41.

  The test apparatus 11 includes a first switch 111 connected to the input-side terminal of the AC adapter 1, a second switch connected to the AC adapter 1 output terminal connected to the information communication apparatus 2, and a first switch The control unit 113 that controls ON / OFF of the switch 111 and the second switch 112 and the voltage / current of the power supplied from the AC adapter 1 to the information communication device 2 are measured, and the measured voltage / current is determined based on the measured voltage / current. A measurement unit (calculation unit) 114 that generates an analog signal, and an ADC (Analog-to-digital converter: analog digital) that converts the generated analog signal into a digital signal (for example, measurement information including a polynomial indicating a change in inrush current) Converter) 115, a communication unit (information transfer unit) 116 for transmitting the converted digital signal to the information communication device 2, and the AC adapter 1 generated in the communication center 4. To receive alerts relating to deterioration condition, and a display unit 117 for displaying a warning relating to deterioration condition of the AC adapter 1.

  The determination unit 41 receives the measurement information transmitted by the communication control unit 401 that has received the measurement information from the information communication device 2, compares the measurement information with a predetermined polynomial stored in a DB (database) 412, and calculates the difference. A first comparison unit 411 to be calculated and a second comparison unit 413 that determines that the AC adapter 1 has deteriorated when the calculated difference exceeds the threshold set by the setting unit 414.

(Operation)
FIG. 2 is a flowchart showing a simple deterioration determination method for a power supply apparatus according to an embodiment of the present invention.

  The AC adapter 1 converts AC power supplied from a commercial input into DC power, and supplies the converted DC power to the information communication device 2 through a DC power supply line.

  The control unit 113 performs ON / OFF control of the first switch 111 and the second switch 112, and transmits an ON / OFF timing signal to the measurement unit 114 (S101). Based on the instruction command of the control unit 113, the first switch 111 controls ON / OFF of the input to the AC adapter 1, and the second switch 112 controls the input from the AC adapter 1 to the information communication device 2. ON / OFF control.

  The measurement unit 114 measures current and voltage between the AC adapter 1 and the information communication device 2 and transmits measurement information to the communication unit 116 via the ADC 115 (S102).

  The communication unit 116 transmits the received measurement information and the ID (for example, serial number) of the information communication device 2 to the information communication device 2 (S103).

  The information communication device 2 transfers the received measurement information and the ID of the information communication device 2 to the communication control unit 401 of the center device 4 via the information communication NW3 (S104).

  The communication control unit 401 inputs the transferred measurement information and the ID of the information communication device 2 to the first comparison unit 411 (S105).

  The first comparison unit 411 receives a predetermined polynomial stored in the DB 412 and corresponding to the ID of the information communication device 2 (for example, a polynomial indicating an inrush current in an initial state when the power supply device is manufactured). The difference obtained by comparing the measurement information is transferred to the second comparison unit 413 (S106).

  The second comparison unit 413 compares the values set by the setting unit 414 and determines that the value has deteriorated if the threshold value is exceeded (S107). The second comparison unit 413 stores the determined result in the DB 412.

  The communication control unit 401 transmits the determination result to the display unit 117 of the test unit 11 via the communication NW 3 and the information communication device 2 (S108).

  The display unit 117 displays the determination result (S109).

(principle)
FIG. 3A to FIG. 3H show changes in inrush current, changes in voltage rise, changes in impedance curve, changes in current-voltage curve on the output side of the AC adapter 1 according to the embodiment of the present invention, Represents. In FIG. 3A to FIG. 3H, the solid line represents the value at the time of manufacturing the capacitor, and the dotted line represents the value at the time of determining the deterioration of the AC adapter.

  FIG. 3A shows an inrush current when the first switch 111 connected to the input side of the AC adapter 1 is turned on while the second switch 112 connected to the output side of the AC adapter 1 is turned off. FIG. 3B shows a change in voltage rise, FIG. 3C shows a change in impedance curve, and FIG. 3D shows a change in current-voltage curve. The inrush current is taken on the vertical axis in FIG. 3A, the voltage is taken on the vertical axis in FIG. 3B, and the impedance is taken on the vertical axis in FIG. 3C. Time is taken on the horizontal axis of FIGS. 3 (a) to 3 (c). In FIG. 3D, the vertical axis represents voltage, and the horizontal axis represents current.

  The solid curve shown in FIG. 3 (a) is a curve representing the inrush current at the time of manufacturing the capacitor, and the dotted curve shown in FIG. 3 (a) is a curve representing the inrush current at the time of determining the deterioration of the AC adapter. . In the first comparison unit 411 of the center device 4, each curve is expressed by a polynomial, and a polynomial indicating a solid curve shown in FIG. 3A and a polynomial showing a dotted curve shown in FIG. Calculate the difference. If the difference is greater than or equal to the threshold, the second comparison unit 413 determines that the AC adapter 1 has a lifetime.

  When the second switch 112 is turned on after the first switch 111 is turned on, FIG. 3 (e) shows the inrush current change, FIG. 3 (f) shows the voltage rise change, and FIG. g) shows the change of the impedance curve, and FIG. 3 (h) shows the change of the current-voltage curve. The inrush current is taken on the vertical axis in FIG. 3 (e), the voltage is taken on the vertical axis in FIG. 3 (f), and the impedance is taken on the vertical axis in FIG. 3 (g). Time is taken on the horizontal axis of FIG. 3 (e) to FIG. 3 (g). In FIG. 3H, the vertical axis represents voltage, and the horizontal axis represents current.

The outline of the operation of the power supply device simple deterioration determination device is shown below.
(1) The first switch 111 is turned on to measure a change in inrush current on the output side of the AC adapter 1, a change in voltage rise, a change in impedance curve, and a change in current-voltage curve.
(2) Next, the measurement unit 114 turns on the second switch 112 to measure the change in the inrush current on the output side of the AC adapter 1, the change in the voltage rise, the change in the impedance curve, and the change in the current-voltage curve. And convert each into a polynomial. The communication unit 116 transfers the converted polynomial and all measurement data to the center device 4 via the information communication device 2.
(3) The polynomial transferred by the center device 4 is compared with a predetermined polynomial, and the difference is calculated. Store the difference in the database.
(4) The difference is compared with the threshold set by the setting unit 414. If the threshold exceeds the threshold set by the setting unit 414, a warning that the AC adapter 1 has deteriorated is transferred to the display unit 117.

Note that there may be a plurality of display units that display a warning that the AC adapter 1 has deteriorated.
In another embodiment, the deterioration of the AC adapter directly affects the deterioration of components constituting the AC adapter, for example, an aluminum electrolytic capacitor, and the capacitance of the aluminum electrolytic capacitor decreases when the deterioration occurs. Therefore, since the amount of charge that can be stored in the deteriorated capacitor is reduced, the amount of inrush current that is generated when the AC adapter is turned on is considered to be lower than that at the time of manufacturing the aluminum electrolytic capacitor. For example, in the curve representing the change in inrush current shown in FIG. 3A, the peak value (i) of the inrush current when the aluminum electrolytic capacitor of the AC adapter deteriorates is the inrush at the time of manufacturing the aluminum electrolytic capacitor of the AC adapter. It becomes lower than the peak value (ii) of the current. The difference between the peak value (ii) and the peak value (i) is calculated by the first comparison unit 411. If the difference is equal to or greater than the threshold value, the second comparison unit 413 determines that the AC adapter 1 is at the end of its life. Also good.

  According to the present embodiment, it is possible to easily determine the deterioration status of the power supply apparatus that supplies power to the information communication apparatus.

1 AC adapter 2 Information communication device 3 Communication NW
4 Center device 11 Test device 41 Judgment unit 111 First switch 112 Second switch 113 Control unit 114 Measurement unit 115 ADC
116 communication unit 117 display unit 401 communication control unit 411 first comparison unit 412 DB
413 Second comparison unit 414 Setting unit

Claims (2)

An information communication device electrically connected to the output terminal of the power supply device, a detection device for detecting voltage / current from the output terminal of the power supply device, and a status of the information communication device connected to the information communication device A simple deterioration determination method for a power supply device comprising:
The detection device includes:
Measure the inrush current of the output terminal of the power supply when the power supply is turned on, calculate a polynomial based on the measured inrush current,
Transferring the calculated polynomial and the ID of the information communication device to the communication device;
The communication device
A predetermined polynomial of the power supply device corresponding to the transferred ID of the information communication device is extracted from a storage unit, a difference between the extracted predetermined polynomial and the transferred polynomial is calculated, and based on the difference To generate a comparison result
A method for determining a simple deterioration of a power supply device, wherein the comparison result is displayed. An information communication device electrically connected to the output terminal of the power supply device, a detection device for detecting voltage / current from the output terminal of the power supply device, and a status of the information communication device connected to the information communication device A simple deterioration determination device for a power supply device including a communication device,
The detection device includes:
A calculation unit that measures an inrush current of the output terminal of the power supply device when the power supply device is turned on, and calculates a polynomial based on the measured inrush current;
An information transfer unit that transfers the calculated polynomial and the ID of the information communication device to the communication device;
The communication device
A predetermined polynomial of the power supply device corresponding to the transferred ID of the information communication device is extracted from a storage unit, a difference between the extracted predetermined polynomial and the transferred polynomial is calculated, and based on the difference A comparison unit for generating a comparison result
A simple degradation determination device for a power supply device, comprising: a second display unit that displays the comparison result.

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