JP2010119271A - Converter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a converter for easily controlling a plurality of power supply systems and saving power. <P>SOLUTION: The converter for controlling power supply systems of a plurality of apparatuses includes: a DC-DC converter circuit 14 (converter circuit) for converting a voltage value of input power into one or more voltage values; a plurality of output terminals 12A, 12B and 13A, 13B; relay sections 18, 19; a control circuit 10 for controlling opening and closing of the relay sections 18, 19; outside contact point signal receiving sections 20, 21 for inputting an operation stop signal ST1 or an operation start signal MT1 of each of the apparatuses; and a network connecting section 24. The control circuit 10 opens or closes the relay sections 18, 19 based on the operation stop signal ST1 or the operation start signal MT1, or a power supply interrupting signal ST2 or a power supply start signal MT2 to interrupt the power supply or supply power to the plurality of apparatuses. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a converter device.

  Patent Document 1 discloses a table tap. This table tap can perform power supply ON / OFF control by operating a model switch for power control of home appliances that do not have a network function, and can be easily installed.

JP 2004-30930 A (summary, paragraph 0001, etc.)

  When using the table taps as shown in Patent Document 1 for devices operating on a factory line, for example, one each must be prepared for each power supply system to which those devices are connected. In addition, a model switch must be set in advance so that each device connected to the power supply system is energized or disconnected. In particular, in a factory with a large site, setting with these model switches is very complicated, leading to human error and increasing time costs.

  The present invention has been made under such a background, and an object thereof is to provide a converter device that easily controls a plurality of power supply systems and saves power.

  One aspect of the present invention is a converter device that controls a power supply system of a plurality of devices, an input terminal to which power is input, and a converter circuit that converts the voltage value to one or more voltage values different from the voltage value of the power. A plurality of output terminals for outputting the voltage converted by the converter circuit, a relay unit disposed in part or all between the converter circuit and the plurality of output terminals, and a plurality of devices by controlling opening and closing of the relay unit A control circuit for controlling the power supply system, an external contact signal receiving unit for inputting an operation stop signal or an operation start signal for each device, and a network connection unit for enabling power supply control to each device from the outside , The control circuit is the operation stop signal or operation start signal received by the external contact signal receiver, or the power supply cutoff signal or power supply start signal received by the network connection unit In which open and close the relay unit performs Blocked or power supply supplying power to a plurality of devices based.

  In addition, the control circuit includes a current sensor that detects power input from the input terminal and a display unit that displays a current value of power detected by the current sensor, and the control circuit includes a current value of power detected by the current sensor. When the current reaches a predetermined current upper limit value, it is preferable to open the relay unit and to interrupt the power supply or display on the display unit that the power used is exceeded.

  The plurality of output terminals are preferably configured as terminal blocks.

  According to the present invention, it is possible to provide a converter device that easily controls a plurality of power supply systems and saves power.

(First embodiment)
The configuration of the converter device according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a schematic configuration of a converter device 1 according to the first embodiment of the present invention.

  As shown in FIG. 1, the converter device 1 includes a control circuit 10, an input terminal 11, output terminals 12A, 12B, 13A, and 13B as terminal blocks, a DC / DC converter circuit 14, and current sensors 15A and 15B. The relay units 18 and 19, the external contact signal input units 20 and 21, the display unit 22, the DIP switch 23, and the network connection unit 24 are main components.

  The control circuit 10 is a circuit that controls the entire converter device 1, and opens and closes the relay units 18 and 19 based on signals from external contact signal input units 20 and 21, a dip switch 23, and a network connection unit 24 described later. Do. That is, the control circuit 10 determines which one of the relay units 18 and 19 to be controlled by an input signal from the external contact signal input unit 20, makes an energized state by closing the target contact, and shuts off by opening it. And Further, the control circuit 10 displays the current value of the DC power input from the DC power supply (not shown) through the input terminal 11 and converted by the DC / DC converter circuit 14 as the value detected by the current sensors 15A and 15B. To the unit 22. Further, the control circuit 10 controls the opening and closing of the relay units 18 and 19 based on a predetermined current upper limit value, thereby adjusting the power supply to each power supply system of the output terminals 12A, 12B, 13A, and 13B. ing. Specifically, the control circuit 10 opens the relay units 18 and 19 to cut off the power supply when the current value detected by the current sensors 15A and 15B exceeds the current upper limit value, or A message indicating that the current upper limit value has been exceeded is displayed on the display unit 22.

  A DC power supply (not shown) is connected to the input terminal 11, and devices (not shown) are connected to the output terminals 12A, 12B, 13A, and 13B as terminal blocks via cables. Devices that always require power supply are connected to the output terminals 12A and 13A, and devices that do not necessarily require power supply are connected to the output terminals 12B and 13B. In the present embodiment, a device (not shown) is assumed to be a device driven by power supply such as a robot, a servo, an encoder, a fan, or the like used in a factory line.

  The DC / DC converter circuit 14 is a multi-output converter circuit that converts a voltage value of DC power supplied from a DC power supply (not shown) into a plurality of different DC power voltage values. In this embodiment, the set voltage of the output terminals 12A and 12B is different from the set voltage of the output terminals 13A and 13B (for example, the set voltage of the output terminals 12A and 12B is 5 V, and the set voltage of the output terminals 13A and 13B). Is 12V). The DC / DC converter circuit 14 also supplies power to the control circuit 10.

  The relay unit 18 is disposed between the DC / DC converter circuit 14 and the output terminal 12B, and the opening and closing of the contacts is controlled by the control circuit 10 described above. The relay unit 19 is arranged between the DC / DC converter circuit 14 and the output terminal 13B, and the control circuit 10 described above controls the opening and closing of the contacts. The relay units 18 and 19 are normally turned on (contacts are closed), and DC power is supplied from a DC power source (not shown) to each device (not shown) connected to the output terminals 12B and 13B. Is done. When the relay units 18 and 19 are turned off (contacts are open), the DC power from the DC power source (not shown) to each device (not shown) connected to the output terminals 12B and 13B is supplied. Supply is cut off.

  The external contact signal input units 20 and 21 are communication interfaces that receive an operation stop signal ST1 or an operation start signal MS1 to each device (not shown) connected to the output terminals 12A, 12B, 13A, and 13B via cables. It is. For example, when the device is a robot, it receives a servo motor operation stop signal ST1 for operating the robot, or receives a robot arm operation stop signal ST1. The operation stop signal ST1 and the operation start signal MS1 may be used as a signal for opening and closing the relay unit 28 for controlling power supply from the AC battery 27 to the target device 29 as shown in FIG. When the external contact signal input units 20 and 21 receive an operation start signal for each device (not shown), it is necessary to supply power before starting each device.

  The dip switch 23 is composed of a very small slide switch. Further, the ON / OFF state of the DIP switch 23 is made to correspond to the digital level LOW / Hi, which is read by the control circuit 10 when the converter device 1 is turned on, and the opening and closing times of the relay units 18 and 19 determined in advance. Can be set. Here, the predetermined opening and closing times of the relay units 18 and 19 can close the contacts only during, for example, the operation time of the factory line (for example, 8 hours from 9 am to 5 pm).

  The network connection unit 24 is a connection unit for controlling the power supply system from the remote terminal 25 via the relay unit 26. For example, the network connection unit 24 may be configured to arrange a network agent card, a LAN card, and a USB terminal. Here, the network includes a local area network (LAN), a wide area network (WAN), the Internet, and the like. The remote terminal 25 logs in to the converter device 1 using a protocol such as SNMP (Simple Network Management Protocol) or TELNET, and forcibly supplies power to the devices connected to the output terminals 12B and 13B. The power supply cutoff signal ST2 to be turned off or the power supply start signal MT2 to be forcibly turned on is output.

(Second Embodiment)
Then, the structure of the converter apparatus which concerns on the 2nd Embodiment of this invention is demonstrated based on FIG. FIG. 2 is a block diagram showing a schematic configuration of a converter apparatus 1A according to the second embodiment of the present invention. The converter device 1A according to the second embodiment of the present invention is provided with an AC / DC converter circuit 14A instead of the DC / DC converter circuit 14 shown in FIG. Yes. Moreover, it has the structure which has provided the relay parts 18 and 19 in all the power supply systems of 1 A of converter apparatuses. In the second embodiment, a device that cannot be stopped on holidays is connected to the output terminal 12C, and a device that may be stopped on holidays is connected to the output terminal 13C. In addition, the same code | symbol is attached | subjected to the function similar to 1st Embodiment, and description is abbreviate | omitted.

  The AC / DC converter circuit 14A is a multi-output converter circuit that converts the voltage value of AC power input from a commercial power supply (not shown) to the input terminal 11 into a plurality of different DC power voltage values. The AC / DC converter circuit 14A supplies power to the control circuit 10 in the same manner as the DC / DC converter circuit 14 of FIG. Note that the AC / DC converter circuit 14A is constituted by, for example, a rectifier circuit. In converter device 1A, operation stop signal MS1 is input to external contact signal receiver 20, and operation stop signal ST1 is input to external contact signal receiver 21. However, both the operation stop signal MS1 and the operation stop signal ST1 may be input to either of the external contact signal receiving units 20 and 21.

  According to the converter devices 1 and 1A having the above-described configuration, the relay units 18 and 19 are opened and closed by the control circuit 10 and power is supplied to necessary devices for a necessary time. Can be easily controlled and power can be saved. For example, power is always supplied to devices (for example, encoders, CPUs, etc.) that always require power supply connected to the output terminals 12A, 13A, 12C, and connected to the output terminals 12B, 13B, 13C. For devices that do not always require power supply (for example, fans), power is supplied only during a specific time zone on weekdays, and the power supply is cut off by opening the contacts of the relay units 18 and 19 on holidays. Thus, unnecessary power can be cut.

  In the converter device 1 described above, the relay unit 18 is provided between the DC / DC converter circuit 14 and the output terminal 12A, while the relay unit 18 is provided between the DC / DC converter circuit 14 and the output terminal 12B. By not having the configuration, it is possible to divide into a power system that can be stopped and a power system that cannot be stopped. Therefore, such a configuration can perform finer control than a configuration having a normal DC / DC converter circuit and an AC / DC converter circuit.

  In addition, the converter devices 1 and 1A display the current value detected by the current sensor 15 on the display unit 22, and when the predetermined current upper limit value is exceeded, the power supply is cut off or a warning message is displayed. Since it is displayed on the unit 16, it is possible to easily grasp the current value that is currently used, and to perform appropriate power management based on the detected current value.

  Moreover, since the converter devices 1 and 1A constitute the output terminals 12A, 12B, 12C, 13A, 13B, and 13C as terminal blocks, the converter devices 1 and 1A are devices that require a large current, such as devices used in a factory line. Can respond.

  Further, since the converter devices 1 and 1A include the network connection unit 24, it is possible to remotely control a plurality of power supply systems, and even if this device is installed in a vast site, the converter device 1 The power supply system corresponding to each device can be easily ON / OFF-controlled without moving for direct operation.

  In addition, since converter device 1A includes AC / DC converter circuit 14A, the same effect as converter device 1 can be obtained even when AC power is supplied.

  Although one embodiment of the present invention has been described above, the present invention can be variously modified in addition to this. This will be described below.

  In the first and second embodiments described above, a configuration in which a DC power source or a commercial power source (AC power source) (not shown) is directly connected to the input terminal 11 is employed. However, the present invention is not limited to this configuration. For example, a DC power supply or a commercial power supply (not shown) is connected to an uninterruptible power supply device or an instantaneous voltage drop protection device as a backup power supply, and those devices and one embodiment of the present invention are implemented. It is good also as a structure which connects the converter apparatuses 1 and 1A which are the forms. By adopting such a configuration, it is possible to safely stop the factory line system in the event of a power failure, and to easily restart the system when the power is restored. Specifically, when a power failure such as a momentary power failure or power failure due to lightning strikes, the system is safely stopped, and necessary facilities are backed up by an uninterruptible power supply or an instantaneous voltage drop protection device. Then, when the power supply is restored, the conversion is performed by the converter devices 1 and 1A. Also, depending on the setting, when a power failure occurs, all the power systems are shut off by converter devices 1 and 1A and then the uninterruptible power supply is stopped. When power is restored, all power systems are energized by converter devices 1 and 1A. In addition, the system can be restarted.

  In the above-described first embodiment, devices that always require power supply are connected to the output terminals 12A and 13A, and the relay units 18 and 19 are connected between the DC / DC converter circuit 14 and the output terminals 12B and 13B. However, the relay unit 18 is connected between the AC / DC converter circuit 14A and all the output terminals 12C and 13C as in the second embodiment. 19 may be provided to control all power supply systems by opening and closing the relay units 18 and 19. Further, the relay unit 18 may not be provided between the AC / DC converter circuit 14A and the output terminal 12C in the second embodiment. Furthermore, it is good also as a structure which connects the apparatus which always needs electric power supply to the output terminals 12B and 13B in the structure of 1st Embodiment.

  In the first and second embodiments described above, the power supply system is described as two systems. However, the present invention is not limited to this configuration. For example, the power supply system may be configured as three systems, four systems, or more systems. . In this case, the output terminals 12A, 12B, 13A, and 13B need to be increased in accordance with the number of power supply systems. In addition, the external contact signal receiving units 20 and 21 are configured to have two so as to have the same number as the relay units 18 and 19, but may not be the same as the number of relay units 18 and 19.

  The converter circuits (DC / DC converter circuit 14 and AC / DC converter circuit 14A) in the first and second embodiments described above are circuits that convert input power into a plurality of different voltage values. It may be a circuit that converts to a single voltage value.

It is a block diagram which shows the structure of the converter apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the converter apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

1, 1A converter device 10 control circuit 11 input terminal 12A, 12B, 12C output terminal (terminal block)
13A, 13B, 13C Output terminal (terminal block)
14 DC / DC converter circuit (converter circuit)
14A AC / DC converter circuit (converter circuit)
15A, 15B Current sensors 18, 19, 28 Relay unit 20, 21 External contact signal input unit 22 Display unit 23 Dip switch 24 Network connection unit 25 Terminal 26 Relay machine 27 AC battery ST1 Operation stop signal MS1 Operation start signal ST2 Power supply cutoff Signal MT2 Power supply start signal

Claims (3)

A converter device for controlling a power supply system of a plurality of devices,
An input terminal to which power is input;
A converter circuit for converting the voltage value into one or more voltage values different from the voltage value of the power;
A plurality of output terminals for outputting the voltage converted by the converter circuit;
A relay unit disposed in part or all between the converter circuit and the plurality of output terminals;
A control circuit for controlling the power supply system of the plurality of devices by controlling opening and closing of the relay unit;
An external contact signal receiving unit for inputting an operation stop signal or an operation start signal of each of the above devices;
A network connection unit that enables power supply control to the above devices from the outside,
The control circuit opens and closes the relay unit based on the operation stop signal or the operation start signal received by the external contact signal receiver, or the power supply cutoff signal or power supply start signal received by the network connection unit, A converter device that cuts off power or supplies power to the plurality of devices. The converter device according to claim 1,
A current sensor for detecting electric power input from the input terminal;
A display unit for displaying a current value of power detected by the current sensor;
With
When the current value of the power detected by the current sensor reaches a predetermined current upper limit value, the control circuit opens the relay unit and cuts off the power supply or exceeds the power used. A converter device characterized by displaying on the display unit. The converter device according to claim 1 or 2,
The converter device, wherein the plurality of output terminals are configured as terminal blocks.

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