JP2011188635A - Wall outlet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wall outlet which protects a power supply system connected to a load device where a short-circuit fault occurs, and prevents the short-circuit fault from affecting a load device where no short-circuit fault occurs. <P>SOLUTION: The wall outlet includes a plurality of power supply systems, and a plurality of receptacles which are connected to the plurality of power supply systems, respectively, and into which plugs provided at one ends of power cables are inserted, respectively. Externally supplied current is branched into the plurality of power supply systems to be output to the plugs inserted in the receptacles. Power is supplied to load devices connected to the other ends of the power cables with the plugs. Each of the power supply systems has a breaker which when the value of a current flowing through the power supply system exceeds a predetermined current value, starts cutting off the current, and a current limiting unit which allows a current to pass toward the load device. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an outlet for connecting a load device and supplying electric power to a connected load device.

  In a power supply system that supplies power to a load device that operates with direct current, an alternating current of a commercial power source is converted into a direct current, and power is supplied to the load device with the converted direct current.

  FIG. 3 is a block diagram illustrating an example of a configuration of a power feeding system that supplies power by a direct current to a load device that operates with direct current.

  The power supply system shown in FIG. 3 is connected to the DC power supply device 130 by a commercial power supply 110, a rectifier 120 that converts the alternating current of the commercial power supply 110 into a direct current and outputs the direct current, a DC power supply device 130, and a power supply cable 140. Outlet 150 and information processing devices 170-1 and 170-2, which are load devices connected to the outlet 150, are provided.

  An insertion plug (not shown) is provided at one end of each of the power cables 160-1 and 160-2, and the insertion plug is inserted into the plug receptacles 153-1 and 153-2. Thereby, the information processing apparatuses 170-1 and 170-2 connected to the other ends of the power cables 160-1 and 160-2 and the outlet 150 are connected. Further, hereinafter, a simple current means a direct current.

  In the power supply system shown in FIG. 3, the current output from the rectifying device 120 is supplied to the outlet 150 via the power supply cable 140 through the DC power supply device capacitor 131 of the DC power supply device 130. In the example illustrated in FIG. 3, the current supplied to the outlet 150 is branched into two power feeding systems. The branched currents are connected to the power cables 160-1 and 160-2 via the wiring protection circuit breakers 151-1 and 151-2 and the plug receivers 153-1 and 153-2 in each power feeding system. The information is sent to the information processing apparatuses 170-1 and 170-2. In the information processing apparatuses 170-1 and 170-2, current is sent to the information processing apparatus units 172-1 and 172-2 while charging the input capacitors 171-1 and 171-2.

  FIG. 4 is a diagram for explaining a situation when a short circuit accident occurs in the information processing device unit 172-1 of the power feeding system illustrated in FIG. In addition, a short circuit accident includes a ground fault accident, for example.

  When a short circuit accident occurs in the information processing device unit 172-1, the power supply system of the outlet 150 is connected from the rectifier 120, the DC power supply device capacitor 131, and the input capacitor 171-2 as indicated by the arrows in FIG. Overcurrent flows to the information processing apparatus 170-1.

  At this time, the information processing apparatus 170-1 is disconnected from the power feeding system by the operation of the circuit breaker 151-1 for wiring protection. Thereby, the electric power feeding system to information processor 170-1 is protected.

  Here, for example, Patent Document 1 discloses a technique for protecting a power feeding system from an excessive current.

  In the technique disclosed in Patent Document 1, redundancy is given to the number of capacitors constituting a capacitor housing box connected to a power supply device that supplies power to a communication facility by direct current. Furthermore, a circuit is provided that suppresses an inrush current that occurs during replacement of the components in the capacitor housing box. As a result, communication troubles associated with replacement work of components in the capacitor housing box are avoided.

JP 2006-196406 A

  In the power supply system as shown in FIGS. 3 and 4, a circuit breaker for wiring protection is provided for each power supply system. In this case, as described above, the load device in which the short circuit accident has occurred is disconnected from the power supply system connecting the load device. Therefore, normally, it is unlikely that the short circuit accident will affect the load device in which the short circuit accident has not occurred.

  Here, consider a case where the outlet 150 is installed in the rack in which the information processing apparatuses 170-1 and 170-2 are accommodated to branch the current.

  In this case, the distance between the current branch point and the load device (information processing devices 170-1 and 170-2) is very short, and the impedance between the information processing device 170-1 and the information processing device 170-2 is very low. Becomes smaller.

  Therefore, as in the case described above, when a short circuit accident occurs in the information processing device unit 172-1, the discharge rate from the input capacitor 171-2 is very fast, and the wiring protection circuit breaker 151-1 starts operating. Before, the voltage value of the input terminal of the information processing apparatus 170-2 rapidly decreases. As a result, the information processing apparatus 170-2 in which no short circuit accident has occurred may stop.

  That is, there is a problem in that the influence of the short circuit accident is exerted on the load device in which the short circuit accident has not occurred.

  The present invention provides an outlet that protects a power supply system connected to a load device in which a short-circuit accident has occurred and that can prevent the influence of a short-circuit accident from affecting a load device in which a short-circuit accident has not occurred. The purpose is to provide.

In order to achieve the above object, an outlet of the present invention includes a plurality of power supply systems and a plurality of plug receptacles connected to each of the plurality of power supply systems and into which plugs provided at one end of the power cable are respectively inserted. The power supplied from the outside by branching the current supplied from the outside to each of the plurality of power feeding systems and outputting the current to the plug inserted in the plug receptacle In the outlet that supplies power to the load device connected to the other end of the cable,
Each of the plurality of power feeding systems is
A circuit breaker that starts to interrupt the current when the current value of the current flowing through the power supply system exceeds a predetermined current value;
A current limiting unit that allows a current in a direction to the load device to pass among the current flowing through the power feeding system.

  Since the present invention is configured as described above, when a short-circuit accident occurs, the voltage value at the input terminal of the load device where the short-circuit accident has not occurred before the circuit breaker for wiring protection starts operation. A sudden drop can be avoided.

  Therefore, it is possible to protect the power supply system connecting the load device in which the short circuit accident has occurred, and to avoid the influence of the short circuit accident on the load device in which the short circuit accident has not occurred. This is an effect that can be realized regardless of the load capacity of the load device.

It is a block diagram which shows the structure of one Embodiment of the electric power feeding system to which the outlet socket of this invention is applied. It is a figure for demonstrating an example of the plug receptacle shown in FIG. 1, and the insertion plug inserted in a plug receptacle. It is a block diagram which shows an example of a structure of the electric power feeding system which supplies electric power with a direct current to the load apparatus which operate | moves by direct current. It is a figure for demonstrating a mode when a short circuit accident generate | occur | produces in the information processing apparatus unit of the electric power feeding system shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an embodiment of a power supply system to which an outlet of the present invention is applied.

  The power supply system of the present embodiment includes a commercial power supply 10, a rectifier 20, a DC power supply 30, a power outlet 50, and information processing devices 70-1 and 70-2 that are load devices. In addition, although the information processing apparatus is mentioned here as an example of the load apparatus, the load apparatus is not limited to the information processing apparatus.

  The rectifier 20 converts the alternating current of the commercial power supply 10 into a direct current and outputs the direct current to the direct current power feeder 30.

  The DC power supply device 30 includes a DC power supply device internal capacitor 31 and a DC power supply device internal circuit breaker 32, and supplies the current output from the rectifying device 20 to the outlet 50 via the power supply cable 40.

  The outlet 50 has two power feeding systems, and the current supplied from the DC power feeding device 30 is branched into two power feeding systems. The two power feeding systems are provided with circuit breakers 51-1 and 51-2 for protection of wiring and diodes 52-1 and 52-2 serving as current limiting units. In each of the two power feeding systems, the wiring protection circuit breaker and the diode are connected in series. The outlet 50 includes plug receptacles 53-1 and 53-2 for connecting the outlet 50 and the information processing apparatuses 70-1 and 70-2.

  The circuit breakers 51-1 and 51-2 for wiring protection start to block the current when the current value of the current flowing through each power feeding system exceeds a predetermined current value. The predetermined current value is, for example, the rated current value of the information processing devices 70-1 and 70-2.

  The diodes 52-1 and 52-2 pass current in the direction from the DC power supply device 30 to the information processing devices 70-1 and 70-2 in the respective power supply systems.

  Each of the plug receptacles 53-1 and 53-2 is connected to each of the two power feeding systems. Moreover, the plugs provided at the respective one ends of the power cables 60-1 and 60-2 are inserted into the plug receivers 53-1 and 53-2, respectively.

  FIG. 2 is a diagram for explaining an example of the plug receivers 53-1 and 53-2 shown in FIG. 1 and plugs inserted into the plug receivers 53-1 and 53-2.

  As shown in FIG. 2, plugs 61-1 and 61-2 are provided at one ends of the power cables 60-1 and 60-2, respectively. Here, it is assumed that the plug 61-1 is inserted into the plug receiver 53-1, and the plug 61-2 is inserted into the plug receiver 53-2. Then, the current branched into the two power supply systems is output to the plug 61-1 inserted in the plug receiver 53-1, and to the plug 61-2 inserted in the plug receiver 53-2. Is output. As a result, power is supplied to the information processing apparatus 70-1 connected to the other end of the power cable 60-1 provided with the plug 61-1. Similarly, electric power is supplied to the information processing device 70-2 connected to the other end of the power cable 60-2 provided with the plug 61-2.

  FIG. 2 shows an example in which the plug is provided with two protrusions and the two protrusions of the plug are inserted into the two holes of the plug receiver. The shape of the holes is not limited to the shape shown in FIG.

  Referring to FIG. 1 again, each of the information processing apparatuses 70-1 and 70-2 has the functions of the input capacitors 71-1 and 71-2 and the information processing apparatuses 70-1 and 70-2. Information processing device units 72-1 and 72-2 are provided.

  In the power supply system shown in FIG. 1, the current output from the rectifying device 20 is supplied to the outlet 50 via the power supply cable 40 through the capacitor 31 in the DC power supply device of the DC power supply device 30. The current supplied to the outlet 50 is branched into two power feeding systems. The branched currents are connected to the circuit breakers 51-1 and 51-2, the diodes 52-1 and 52-2, the plug receivers 53-1 and 53-2, and the plugs 61-1 in each power feeding system. , 61-2, and sent to the information processing devices 70-1 and 70-2 connected to the power cables 60-1 and 60-2. In the information processing devices 70-1 and 70-2, current is sent to the information processing device units 72-1 and 72-2 while charging the input capacitors 71-1 and 71-2.

  The operation when a short circuit accident occurs in the information processing device unit 72-1 shown in FIG. 1 will be described below. In addition, a short circuit accident includes a ground fault accident, for example.

  When a short circuit accident occurs in the information processing device unit 72-1, an overcurrent flows from the rectifier 20 and the DC power supply inner capacitor 31 to the information processing device 70-1 through the power supply system of the outlet 50.

  At this time, a current also flows from the input capacitor 71-2 of the information processing device 70-2, but this current is prevented from flowing out by the diode 52-2. Therefore, the information processing device 70-1 is disconnected from the power feeding system by the operation of the wiring protection circuit breaker 51-1 without the voltage value of the input terminal of the information processing device 70-2 suddenly decreasing.

  As described above, in the present embodiment, each of the plurality of power feeding systems of the outlet 50 includes the circuit breaker 51 for wiring protection that starts to block the current when the current value of the current flowing through the power feeding system exceeds a predetermined current value. -1 and 51-2, and diodes 52-1 and 52-2 that pass a current in a direction toward the information processing devices 70-1 and 70-2 among currents flowing through the power feeding system.

  As a result, when the short circuit accident occurs, the voltage value at the input terminal of the information processing apparatus in which the short circuit accident has not occurred can be prevented from suddenly dropping before the circuit breaker for wiring protection starts operation. it can.

  Therefore, it is possible to protect the power supply system connected to the information processing apparatus in which the short circuit accident has occurred, and to avoid the influence of the short circuit accident on the information processing apparatus in which the short circuit accident has not occurred. This is an effect that can be realized regardless of the load capacity of the information processing apparatus.

  In the present embodiment, the number of power feeding systems is two, but the number of power feeding systems is not limited to two. Further, since the number of information processing devices can be changed according to the number of power supply systems, the number of information processing devices is not limited to two.

  Further, in the present embodiment, the case where a diode is used as an example of the current limiting unit has been described. However, the current limiting unit is not limited to the diode as long as current in only one direction is allowed to pass.

  Further, as in this embodiment, even if power is supplied to the load device via a diode, there is no increase in loss compared to the case where no diode is provided, and a highly efficient power supply system can be maintained.

  Further, when there is another DC power supply device connected to the rectifier 20, even when a short-circuit accident occurs in the load device connected to the DC power supply device 30, the other DC power supply device is shut off in the DC power supply device. The device can be avoided from operating. That is, it is possible to prevent the load device connected to the other DC power supply device from going down.

  In addition, the power energy for operating the DC power supply circuit breaker 32 (for example, a fuse) and the wiring protection circuit breakers 51-1 and 51-2 is supplied from the rectifier 20 as in the case of not using a diode. Supplied. For example, when there is another DC power supply device connected to the rectifier 20, power energy is also supplied from a capacitor in the DC power supply device of the other DC power supply device. Therefore, in this embodiment, it is not necessary to change the capacity and output capacity of the output capacitor (not shown) of the rectifier 20 compared to the case where no diode is interposed.

DESCRIPTION OF SYMBOLS 10 Commercial power supply 20 Rectifier 30 DC power feeder 31 Capacitor in DC power feeder 32 Circuit breaker in DC power feeder 40 Power supply cable 50 Outlet 51-1, 51-2 Circuit breaker 52-1, 52-2 Diode 53- DESCRIPTION OF SYMBOLS 1,53-2 Plug receptacle 60-1, 60-2 Power cable 61-1, 61-2 Plug 70-1, 70-2 Information processing apparatus 71-1, 71-2 Input capacitor 72-1, 72 -2 Information processing unit

Claims (3)

A plurality of power feeding systems, and a plurality of plug receptacles connected to each of the plurality of power feeding systems and into which insertion plugs provided at one end of the power cable are respectively inserted; By branching to each of a plurality of power feeding systems and outputting to the insertion plug inserted into the plug receptacle, power is supplied to the load device connected to the other end of the power cable provided with the insertion plug. At the outlet to be supplied,
Each of the plurality of power feeding systems is
A circuit breaker that starts to interrupt the current when the current value of the current flowing through the power supply system exceeds a predetermined current value;
An outlet having a current limiting unit that allows a current in a direction to the load device to pass among currents flowing through the power feeding system. The outlet according to claim 1,
The circuit breaker and the current limiting unit are outlets connected in series. In the outlet according to claim 1 or 2,
The current limiting unit is an outlet that is a diode.

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