JP2019122048A - Inrush current control system, inrush current control method, and terminal device - Google Patents

Abstract

To provide an inrush current control system capable of reducing false detection of excess current due to inrush current.SOLUTION: An inrush current control system 1 including a plurality of terminal devices 3 through which inrush current generated due to power activation flows and a monitoring device 4 monitoring the plurality of terminal devices, in which the monitoring device sends an instruction to supply the inrush current to each terminal device, and the terminal device starts a timer circuit 21c that measures the timing of the inrush current injection based on the supplying instruction, and supplies the inrush current at a predetermined timing.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an inrush current control system in which an inrush current is generated by power supply to a terminal device.

  Conventionally, in a power supply system including a plurality of power supply systems configured with a plurality of terminal devices, for example, a plurality of totalizer terminals (see Patent Document 1 below) that sell and pay back voting tickets for public competition, the breakers of the terminal devices are Operate the circuit breaker at the polling place or operate the main circuit breaker of the entire building while the power is on (on). By such an operation, power supply (power supply) to the terminal device is performed. When power is supplied to the respective terminal devices simultaneously in such a power supply system, an inrush current is generated (see Patent Document 1).

Unexamined-Japanese-Patent No. 2002-215833

  If power is supplied to the terminals all at once, the inrush current of each terminal does not have a problem within the specified value, but since the inrush current of each terminal is generated at the same time, there is a problem of causing a malfunction of the primary overcurrent detection circuit of the system. In addition, turning the breaker on and off tends to cause the breaker to break easily, resulting in an increase in repair costs.

  An object of the present invention is to provide an inrush current control system capable of reducing an erroneous current detection due to an inrush current.

  In order to achieve the above object, the present invention is an inrush current control system comprising a plurality of terminal devices through which inrush current generated by power-on flows and a monitoring device monitoring the plurality of terminal devices, The monitoring device transmits an instruction to apply the inrush current to each terminal device, and the terminal device starts a timer circuit that measures the timing of applying the inrush current based on the instruction to apply, and the inrush occurs at a predetermined timing. It is characterized in that current is supplied.

  In the inrush current control system according to the present invention, it is a preferable aspect that the terminal device performs the inrush current when the started timer circuit times out.

  In the inrush current control system according to the present invention, it is a preferable aspect that the terminal transmits a response to the effect that the inrush current has been applied to the monitoring device after the inrush current has been applied.

  Further, in the rush current control system according to the present invention, the monitoring device issues the closing instruction for each group of the plurality of grouped terminals, and after receiving the response from all the terminal devices in the group, or predetermined It is a preferable aspect to transmit the introduction instruction to the terminal device of another group after the passage of time.

  In the rush current control system according to the present invention, when the monitoring device does not receive the response from all the terminal devices in the group and the predetermined time has elapsed, the monitoring device does not receive the response from the terminal device. It is a preferable aspect to display a screen to the effect that there was no such response.

  Further, the present invention is a terminal device through which inrush current generated by turning on the power flows, and a power receiving unit for receiving the inrush current, and an instruction for closing the inrush current are received from the monitoring device, and based on the closing instruction. The measurement apparatus is characterized by comprising: a measurement unit that measures a timing of injection of the inrush current; and a current input unit that supplies the inrush current to the main power supply circuit according to the measurement result.

  Further, the present invention is a rush current control method in a rush current control system, comprising: a plurality of terminal devices through which inrush current generated by power-on flows; and a monitoring device monitoring the plurality of terminal devices, The monitoring device sends an instruction to apply the inrush current to each of the terminal devices, and the terminal device starts a timer circuit that measures the timing of applying the inrush current based on the instruction to apply, and the predetermined timing is the timing. And a step of injecting inrush current.

  According to the present invention, it is possible to reduce over current erroneous detection due to inrush current.

It is a figure showing an example of the rush current control system in an embodiment. It is a figure which shows an example of the hardware constitutions of the terminal device in embodiment. It is a figure showing an example of functional composition of a terminal unit in an embodiment. It is a figure which shows an example of the hardware constitutions of the monitoring apparatus in embodiment. It is a sequence chart which shows an example of a sequence of rush current control of a rush current control system in an embodiment. It is a figure which shows an example of the error display screen of the monitoring apparatus in embodiment. It is a flowchart which shows an example of the rush current control processing flow of the terminal device in embodiment. It is a flowchart which shows an example of the rush current control processing flow of the monitoring apparatus in embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a diagram showing an example of a rush current control system in the embodiment. As shown in FIG. 1, the rush current control system 1 includes a breaker 2 (2a, 2b, 2c, 2d, 2e, 2f) and a terminal device (hereinafter referred to as a terminal) 3 (3a, 3b, 3c, 3d) , And the monitoring device 4. When the rush current control system 1 supplies power to the terminal 3 at the same time, AC (Alternating Current) is used to reduce false detection of overcurrent due to the rush current and to reduce the frequency of failures due to turning on / off of the breaker 2. It controls so that the timing of the inrush current at the time of supply does not overlap. Details of the control will be described later.

  The rush current control system 1 can be used for various applications, for example, it sells a voting ticket for public competition (horse racing, race, racing, auto racing, etc.) and sells a lottery ticket such as a totalizeta system which refunds money, It is possible to use in the system etc which pays back. In addition, rush current control system 1 is not limited to the above-mentioned system, and composition of rush current control system 1 is not limited to this, and may contain other composition. Each configuration will be described below.

  The breaker 2 is operated to supply power to the terminal 3 and is hierarchically configured as shown in FIG. 1, for example. That is, the breakers 2b, 2c and 2d are connected below the breaker 2a which is the origin of the rush current control system 1, and the breakers 2e and 2f are connected below the breaker 2b. Therefore, even if the breaker 2a and the breaker 2b are in the ON state (energized state) where power can be supplied, the terminal 3 does not start because the power is not supplied unless the breakers 2e and 2f are in the ON state.

  The network configuration 5b including the lower breakers 2e and the breakers 2f of the breaker 2b is the same as the network configurations 5c and 5d including the lower breakers 2 of the breakers 2c and 2d, and these network configurations are, for example, predetermined areas. Will be placed in For example, in the case of the tollizeta system, a plurality of voting places (voting place terminals) for releasing and repaying a voting ticket are divided into a plurality of groups, and one grouped group constitutes one network. Hereinafter, a network configuration 5b including the lower breakers 2 (2e, 2f) of the breaker 2b will be described as an example.

  A plurality of terminals 3 (3a to 3d) are connected to the breakers 2e and 2f, respectively. For example, when the rush current control system 1 is activated (the breakers 2a and 2b are turned on), the breaker 2e is subordinate Power is supplied to a certain terminal 3 (3a, 3b, etc.). As a result, inrush current flows in the terminal 3.

  The breakers 2e and 2f included in at least the lower network configuration 5b may always be in the on state. As a result, it is possible to save the trouble of switching on and off the lower-side breaker 2 (for example, dozens of breakers) and to reduce a failure due to the switching operation.

  The terminals 3 are connected under the breaker 2 and are activated by the power supply from the breaker 2, and for example, about 50 units are connected under the breaker 2e and the breaker 2f, respectively. Although a plurality of terminals 3 are connected under one breaker 2, one terminal 3 is connected under one breaker 2 according to the operation, such as wanting to control each terminal 3 individually. It may be of any configuration.

  The terminal 3 has an inrush current delay circuit 21 which prevents the timing of the inrush current from overlapping with the main power supply circuit 20 as described later. Details will be described later.

  The monitoring device 4 monitors the terminal 3 and supplies inrush current to the terminal 3 (or each group constituted by a plurality of terminals 3 as described later) so that the inrush current does not specifically overlap. Give instructions. If the monitoring device 4 receives from the terminal 3 (or all the terminals 3 in the group as described later) a response to the effect that the main power circuit 20 of the terminal 3 has received an AC after the closing instruction, the other terminal 3 ( Alternatively, as described later, the instruction to apply inrush current is given to another group).

  When the predetermined time (timer) has elapsed, the monitoring device 4 instructs the other terminals 3 (or another group as described later) to apply inrush current without receiving a response from the terminal 3. You may go.

  That is, the monitoring apparatus 4 issues an insertion instruction for each group of the plurality of grouped terminals 3, and inputs the information to the terminals 3 of other groups after receiving responses from all the terminals 3 of the group or after a predetermined time has elapsed. Send instructions

  In addition, when the monitoring device 4 does not receive a response from the terminal 3 even after a predetermined time has elapsed, it displays a screen indicating that there is no response. That is, the monitoring device 4 does not receive a response from all the terminals of the group, and when a predetermined time has elapsed, displays a screen indicating that there is no response from a terminal which has not received a response. An example of a display screen indicating that there is no response will be described later.

  In this example, although there are only one monitoring device 4 in the network configuration 5b, there may be more than one. In that case, each monitoring device 4 monitors a group of terminals 3 grouped in advance. Further, instead of providing the monitoring device 4 for each network configuration, one monitoring device 4 may be provided in the entire inrush current control system 1. That is, one monitoring device 4 may monitor all the terminals 3 of the inrush current control system 1.

  Next, an example of the hardware configuration of the terminal 3 in the embodiment will be described with reference to FIG. As shown in FIG. 2, the terminal 3 includes the main power supply circuit 20 and the inrush current delay circuit 21 in the power supply device of the terminal 3. The terminal 3 includes a control circuit for controlling the terminal 3 in addition to these circuits, but the description is omitted here.

  The main power supply circuit 20 includes a rush prevention circuit 20a, a rectifier circuit 20b, and a DC / DC circuit 20c. The main power supply circuit 20 is a general circuit mounted also in the power supply device of the conventional terminal 3.

  The rush prevention circuit 20a makes the rise of the voltage gentle and flows a current slowly, that is, a resistor. The rectifying circuit 20b is a (rectifying) element that allows current to flow only in a fixed direction, and converts AC (AC) into DC (Direct Current). The DC / DC circuit 20c generates the necessary voltage in the circuit.

  The rush current delay circuit 21 includes a rush prevention circuit 21a, a rectifier circuit 21b, a timer circuit 21c, and a switch (SW) 21d. The functions of the rush prevention circuit 21a and the rectification circuit 21b are the same as those of the rush prevention circuit 20a and the rectification circuit 20b described above, and therefore the description thereof is omitted.

  The timer circuit 21c starts a timer set to measure the timing of injection of the inrush current based on an instruction to supply the inrush current from the monitoring device 4, and injects the inrush current to the main power supply circuit 20 when it times out. Turn on the SW 21d. That is, the terminal 3 applies inrush current when the activated timer circuit 21c times out.

  In addition, after the SW 21 d is turned on and the inrush current is applied to the main power supply circuit 20, the timer circuit 21 c transmits a response to the effect that the inrush current is applied to the main power supply circuit 20 to the monitoring device 4. That is, the terminal 3 sends a response to the effect that the inrush current has been applied to the monitoring device 4 after the inrush current has been applied.

  The SW 21 d is a switch for supplying inrush current to the main power supply circuit 20, and is in an off state in the initial state before the inrush current flows, and is turned on by an instruction of the timer circuit 21 c to make the inrush current a main power supply circuit. Flow to 20. That is, when the rush current is received, the rush current does not flow to the SW 21 d and flows to the rush prevention circuit 21 a.

  Next, an example of a functional configuration of the terminal 3 in the embodiment will be described with reference to FIG. As shown in FIG. 3, the terminal 3 includes a power reception unit 30, a measurement unit 31, and a current input unit 32. In addition. The configuration of the terminal 3 is not limited to this, and may include other configurations.

  The power receiving unit 30 receives an inrush current from the side of the breaker 2 and corresponds to the inrush protection circuit 21a and the rectifier circuit 21b.

  The measuring unit 31 receives a rush current closing instruction from the monitoring device 4 and measures the timing of closing the rush current based on the closing instruction from the monitoring device 4 and corresponds to the timer circuit 21c.

  The current input unit 32 applies inrush current to the main power supply circuit 20 according to the measurement result by the measurement unit 31, that is, the time-out, and corresponds to the SW 21d.

  Next, an example of the hardware configuration of the monitoring device 4 in the embodiment will be described with reference to FIG. As shown in FIG. 4, the monitoring device 4 includes a CPU 40, a memory 41, a keyboard 42, a monitor 43, an I / F 44, an inrush current delay control I / F 45, and a bus 46.

  The CPU 40 reads a program (for example, a monitoring program or the like) for performing various processes of the monitoring device 4 stored in the memory 41 or the like through the bus 46 and performs various processes according to the read program.

  The memory 41 stores an application program for performing various processes of the monitoring device 4 and data required for the process of the monitoring device 4.

  The keyboard 42 is for inputting information, and is for setting, for example, a timer that counts down after transmitting an input instruction to the terminal 3 described later.

  The monitor 43 displays information, and performs, for example, an error display when a response from the terminal 3 described later is not received.

  The I / F 44 transmits and receives data (input instruction, response, and the like) via the outside (terminal 3) and the network 47.

  The inrush current delay control I / F 45 transmits an insertion instruction of the inrush current to the terminal 3 and then transmits the insertion instruction to another terminal 3 (or a group including the other terminal 3) when receiving a response. It is

The bus 46 is a path that mediates the exchange of control signals, data signals, and the like between the devices.
Next, the sequence of inrush current control of the inrush current control system 1 according to the embodiment will be described with reference to FIG.

  As shown in FIG. 5, in the terminal 3, when the AC is supplied to the terminal 3 (S501), power is received by the inrush current delay circuit 21 (S502). On the other hand, when the monitoring device 4 activates the monitoring device 4 itself (S503), it transmits an instruction to apply inrush current to the terminal 3 of a certain group (S504). At this time, the monitoring device 4 transmits a closing instruction and simultaneously starts a timer set in advance, and starts timer measurement (counting of time).

  When the terminal 3 receives the closing instruction from the monitoring device 4, the terminal 3 starts a timer set in advance and starts timer measurement (S505). The terminal 3 turns on the SW 21d of the inrush current delay circuit 21 in order to apply inrush current to the main power supply circuit 20 when the set timer times out (S506), and that the inrush current is applied to the main power supply circuit 20, That is, a response to the effect that the SW 21d is turned on is transmitted to the monitoring device 4 (S507).

  When the monitoring device 4 receives responses from all the terminals 3 of a certain group, it sends an inrush current injection instruction to the terminals 3 of the other group (S508). When the monitoring device 4 does not receive responses from all the terminals 3 of a group at the time when the timer set starts after timer measurement starts, the terminals 3 do not respond to the closing instruction. Display a message (error display). An example of the error display is shown in FIG.

  As shown in FIG. 6, on the screen 60, the response status is displayed for each group. In this example, group 1 and group 2 are shown, and the number of terminals 3 belonging to each group is ten. As an example of the display configuration of the screen 60, a group name field 61, a terminal number and response status field 62, an error presence / absence field 63, and a comment field 64 are included.

  The group name column 61 indicates the group name (for example, group 1, group 2, etc.) to which the grouped terminals 3 belong. In the terminal number and response status column 62, the terminal number (identification number) assigned to each terminal and the determination of the response to the insertion instruction are shown. For example, since the terminal 3 of the terminal number 300001 of the group 1 receives a response to the insertion instruction, the response state is OK. On the other hand, since the terminal 3 of the terminal number 300014 of the group 2 did not respond to the closing instruction, the response status is NG. Thereby, it can be grasped that the terminal 3 of the terminal number 300014 of the group 2 is not responding.

  Further, the presence / absence of error column 63 indicates the presence or absence of an error, and if there is no error, an indication that there is no error (for example, a horizontal line) is displayed, and if there is an error, an error code is displayed. For example, since the terminal 3 of the terminal number 300014 of the group 2 described above did not respond to the insertion instruction, an error code (for example, E1234) indicating that there is no response is displayed. The error code depends on the content of the error.

  Further, the comment column 64 shows details of the error contents and the like. For example, in the case of the terminal 3 of the terminal number 300014 of the group 2 described above, it is displayed that there is no response to the closing instruction.

  The group information which does not fit in the screen 60 can be browsed by, for example, touching the previous page button 65 or the next page button 66 displayed on the screen 60.

  The error display as shown in FIG. 6 makes it possible not only to grasp the terminal 3 not responding but also to grasp the progress.

  Next, an example of the rush current control process of the terminal 3 in the embodiment will be described using FIG. 7.

  When the breaker 2a at the origin of the inrush current control system 1 and the breaker 2b at the lower stage thereof are operated to turn on current, AC is supplied to the terminal 3 (step S701), and the inrush current delay circuit The inrush current is received at 21 (step S702). At this time, since the inrush current delay circuit 21 is a small circuit, the inrush current flowing is small.

  The terminal 3 determines whether an instruction to apply inrush current is received from the monitoring device 4 (step S703). When the closing instruction has been received (Yes in step S703), the terminal 3 starts a timer set in advance (step S704). On the other hand, when the insertion instruction has not been received (No in step S703), the terminal 3 waits for the insertion instruction.

  The terminal 3 determines whether or not the timer has timed out (step S705). If timed out (Yes in step S705), the terminal 3 applies the inrush current to the main power supply circuit 20 and the SW 21d of the inrush current delay circuit 21 Is turned on (step S706), and inrush current is applied to the main power supply circuit 20. After that, the terminal 3 transmits a response to the effect that the SW 21 d has been turned on (indication that the inrush current can be normally applied to the main power supply circuit 20) to the monitoring device 4 (step S707).

  Next, an example of rush current control processing of the monitoring device 4 in the embodiment will be described using FIG.

  The monitoring device 4 activates the monitoring device 4 itself (step S801), and transmits an inrush current injection instruction to the terminal 3 of a certain group (for example, group 1) (step S802). Here, although the insertion instruction is transmitted to the terminal 3 for each group, it may be transmitted for each terminal 3 instead of each group.

  After transmitting the closing instruction, the monitoring device 4 starts a timer set in advance and starts timer measurement (step S803). The monitoring device 4 determines whether the timer started without receiving the response from all the terminals 3 of the group that has sent the insertion instruction has timed out (step S804).

  When the time-out occurs (Yes in step S804), the monitoring device 4 performs the above-described error display (step S805). Thereby, it can be grasped which terminal 3 does not respond, and it is possible to detect a defect of the terminal 3 etc. at an early stage.

  On the other hand, when the timeout does not occur (No in step S804), the monitoring device 4 determines whether the responses from all the terminals 3 of the group have been received (step S806), and the responses from all the terminals 3 have been received ( Yes in step S806, the monitoring apparatus 4 transmits an inrush current injection instruction to the terminal 3 of another group (step S807). On the other hand, when the response is not received (No in step S806), the process returns to step S804.

  It should be noted that the monitoring device 4 does not transmit the rush current injection instruction to the terminals 3 of the other groups after receiving the responses from all the terminals 3 of the group, but the responses from the predetermined number of terminals 3 in the group If the user has received a call, a closing instruction may be sent. Thus, the rush current control system 1 can be quickly activated.

  When the monitoring device 4 times out (Yes in step S804), the monitoring device 4 may display the above-described error and may transmit a rush current injection instruction to the terminal 3 of another group.

  According to the inrush current control system 1 as described above, the timing of the application of the inrush current can be changed by the timer circuit, and the inrush current is dispersed, so that the erroneous current detection due to the inrush current can be reduced. Moreover, ON / OFF of the breaker for every predetermined area can be omitted, and the failure frequency of the breaker can be reduced.

  In addition, the above-described embodiment is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the embodiment.

DESCRIPTION OF SYMBOLS 1 rush current control system 2 breaker 3 terminal 4 monitoring apparatus 5b, 5c, 5d network configuration 20 main power supply circuit 20a rush prevention circuit 20b rectifier circuit 20c DC / DC circuit 21 rush current delay circuit 21a rush prevention circuit 21b rectifier circuit 21c timer circuit 21d SW
30 power reception unit 31 measurement unit 32 current input unit 40 CPU
41 Memory 42 Keyboard 43 Monitor 44 I / F
45 Inrush current delay control I / F
46 Bus 47 Network 60 Screen 61 Group Name Column 62 Terminal Number and Response Status Column 63 Error Presence Column 64 Comment Column 65 Previous Page Button 66 Next Page Button

Claims (7)

An inrush current control system comprising: a plurality of terminal devices through which inrush current generated by power-on flows; and a monitoring device monitoring the plurality of terminal devices,
The monitoring device transmits an instruction to apply the inrush current to each of the terminal devices,
The inrush current control system, wherein the terminal device starts a timer circuit that measures the timing of injection of the inrush current based on the closing instruction, and performs injection of the inrush current at a predetermined timing. The inrush current control system according to claim 1, wherein the terminal device injects the inrush current when the activated timer circuit times out. The rush current control system according to claim 1 or 2, wherein the terminal device transmits a response to the effect that the inrush current has been injected to the monitoring device after the inrush current is injected. The monitoring apparatus issues the input instruction for each group of the plurality of grouped terminals, and after receiving the response from all the terminals of the group, or after a predetermined time has elapsed, the terminals of the other group 4. The inrush current control system according to claim 3, wherein the turn-on instruction is transmitted. The monitoring device displays the screen indicating that there is no response from the terminal device that did not receive the response when the predetermined time has elapsed without receiving the response from all the terminal devices in the group. The inrush current control system according to claim 4, characterized in that: A terminal device in which inrush current generated by turning on the power flows,
A power receiving unit that receives the inrush current;
A measurement unit that receives an instruction to apply the inrush current from the monitoring device and measures timing of applying the inrush current based on the instruction to apply;
A current input unit for supplying the inrush current to the main power supply circuit according to the measurement result;
A terminal device characterized by comprising. A rush current control method in a rush current control system, comprising: a plurality of terminal devices through which inrush current generated when power is supplied flows; and a monitoring device monitoring the plurality of terminal devices,
The monitoring device transmits an instruction to apply the inrush current to each of the terminal devices;
The terminal device starts a timer circuit that measures the timing of injection of the inrush current based on the closing instruction, and performs the injection of the inrush current at a predetermined timing,
An inrush current control method characterized by having.

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