JP6909150B2 - Inrush current control system, inrush current control method and terminal equipment - Google Patents

Description

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

Conventionally, in a power supply system composed of a plurality of terminal devices, for example, a power supply system having a plurality of totalizer terminal devices (see Patent Document 1 below) for selling and refunding voting tickets for public competitions, the breaker of the terminal device is used. Operate the breaker at the voting station or operate the breaker at the base of the entire building while the power is on. By such an operation, power is supplied (powered) to the terminal device. In such a power supply system, when power is supplied to each terminal device all at once, an inrush current is generated (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2002-215833

When power is supplied to the terminal devices all at once, there is no problem with the individual inrush currents within the specified values, but at the same time, the inrush currents of each terminal device are generated, which causes a problem of causing a malfunction of the original overcurrent detection circuit of the system. Another problem is that turning the breaker on and off makes it easier for the breaker to break down, increasing repair costs.

In view of the above problems, an object of the present invention is to provide an inrush current control system capable of reducing false detection of overcurrent due to inrush current.

In order to achieve the above object, the present invention is an inrush current control system including a plurality of terminal devices through which an inrush current generated by turning on the power flows and a monitoring device for monitoring the plurality of terminal devices. The monitoring device transmits an inrush current input instruction to each terminal device, and the terminal device activates a timer circuit that measures the inrush current input timing based on the inrush instruction, and the inrush current is input at a predetermined timing. It is characterized by applying an electric current.

Further, in the inrush current control system of the present invention, it is a preferred embodiment that the terminal device inputs the inrush current when the activated timer circuit times out.

Further, in the inrush current control system of the present invention, it is a preferred embodiment that the terminal device transmits the response to the effect that the inrush current is applied after the inrush current is applied to the monitoring device.

Further, in the inrush current control system of the present invention, the monitoring device issues the closing instruction for each group of the plurality of terminals grouped, and after receiving the response from all the terminal devices in the group, or a predetermined value. It is a preferred embodiment to transmit the closing instruction to the terminal device of another group after the lapse of time.

Further, in the inrush current control system of the present invention, when the monitoring device does not receive the response from all the terminal devices in the group and the predetermined time elapses, the response is not received from the terminal device. It is a preferred embodiment to display a screen indicating that the response was not received.

Further, the present invention is a terminal device through which an inrush current generated by turning on the power flows, and receives a power receiving unit that receives the inrush current and an instruction to turn on the inrush current from a monitoring device, and based on the instruction to turn on the power, the present invention is described. It is characterized by including a measuring unit for measuring the timing of inputting the inrush current and a current input unit for inputting the inrush current to the main power supply circuit according to the measurement result.

Further, the present invention is an inrush current control method in an inrush current control system including a plurality of terminal devices through which an inrush current generated by turning on the power flows and a monitoring device for monitoring the plurality of terminal devices. The monitoring device activates a step of transmitting the inrush current input instruction to each terminal device, and the terminal device activates a timer circuit that measures the inrush current input timing based on the input instruction, and the terminal device activates the timer circuit at a predetermined timing. It is characterized by having a step of inputting an inrush current.

According to the present invention, it is possible to reduce false detection of overcurrent due to inrush current.

It is a figure which shows an example of the inrush current control system in embodiment. It is a figure which shows an example of the hardware composition of the terminal apparatus in embodiment. It is a figure which shows an example of the functional structure of the terminal apparatus in embodiment. It is a figure which shows an example of the hardware configuration of the monitoring apparatus in embodiment. It is a sequence chart which shows an example of the sequence of the inrush current control of the inrush current control system in 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 inrush current control processing flow of the terminal apparatus in embodiment. It is a flowchart which shows an example of the inrush 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 an inrush current control system according to the embodiment. As shown in FIG. 1, the inrush 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 inrush current control system 1 supplies power to the terminals 3 all at once, the AC (Alternating Current) is used to reduce the false detection of overcurrent due to the inrush current and the frequency of failure due to the on / off of the breaker 2. It is controlled so that the timing of the inrush current at the time of supply does not overlap. The details of the control will be described later.

The inrush current control system 1 can be used for various purposes. For example, a totalizer system for selling and refunding voting tickets for public competitions (horse racing, bicycle racing, boat racing, auto racing, etc.) and lottery tickets such as lottery tickets are released. It can be used in refund systems and the like. The inrush current control system 1 is not limited to the above system, and the configuration of the inrush current control system 1 is not limited to this, and may include other configurations. Each configuration will be described below.

The breaker 2 is operated to supply electric power to the terminal 3, and is configured hierarchically as shown in FIG. 1, for example. That is, the breakers 2b, 2c, and 2d are connected to the lower part of the breaker 2a at the base of the inrush current control system 1, and the breakers 2e and 2f are connected to the lower part of the breaker 2b. Therefore, even if the breakers 2a and the breakers 2b are in the on state (energized state) in which the power can be supplied, the power is not supplied unless the breakers 2e and 2f are in the on state, so that the terminal 3 does not start.

The network configuration 5b including the breaker 2e and the breaker 2f lower than the breaker 2b is the same as the network configuration 5c and 5d including the breaker 2 lower than the breaker 2c and 2d. It is placed in. For example, in the case of a totalizer system, a plurality of polling stations (polling place terminals) for selling and refunding voting tickets are divided into a plurality of groups, and one group group constitutes one network. In the following, a network configuration 5b including the breakers 2 (2e, 2f) lower than the breakers 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 inrush current control system 1 is activated (the breakers 2a and 2b are turned on), the breakers 2e are subordinated. Power is supplied to a certain terminal 3 (3a, 3b, etc.). As a result, an inrush current flows through the terminal 3.

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

The terminal 3 is connected to the subordinate of the breaker 2 and is activated by the power supply from the breaker 2. For example, about 50 terminals are connected to the subordinates of 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 depending on the operation such as wanting to control each terminal 3 individually. The configuration may be.

As will be described later, the terminal 3 has an inrush current delay circuit 21 that prevents the timings of the inrush currents from overlapping, in addition to the main power supply circuit 20. Details will be described later.

The monitoring device 4 monitors the terminal 3, and specifically inputs the inrush current to the terminal 3 (or for each group composed of a plurality of terminals 3 as described later) so that the inrush currents do not overlap. Give instructions. After the turn-on instruction, when the monitoring device 4 receives a response from the terminal 3 (or all the terminals 3 in the group as described later) that the AC is turned on to the main power supply circuit 20 of the terminal 3, the other terminal 3 (or another terminal 3 (or as described later) Or, as will be described later, instruct the other groups) to input the inrush current.

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

That is, the monitoring device 4 gives an input instruction for each group of the plurality of terminals 3 divided into groups, receives responses from all the terminals 3 in the group, or inputs to the terminals 3 of other groups after a predetermined time has elapsed. Send instructions.

Further, the monitoring device 4 displays a screen indicating that there is no response when the response from the terminal 3 is not received even after the lapse of a predetermined time. That is, the monitoring device 4 does not receive a response from all the terminals in the group, and when a predetermined time elapses, the monitoring device 4 displays a screen indicating that there is no response from the terminal that did not receive the response. An example of a display screen indicating that there was no response will be described later.

In this example, there is only one monitoring device 4 in the network configuration 5b, but there may be a plurality of monitoring devices 4. 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 for the entire inrush current control system 1. That is, one monitoring device 4 may monitor all 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 has a main power supply circuit 20 and an inrush current delay circuit 21 in the power supply device of the terminal 3. In addition to these circuits, the terminal 3 also includes a control circuit for controlling the terminal 3, but the description thereof will be omitted here.

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

The inrush prevention circuit 20a slows the rise of the voltage and allows a current to flow slowly, that is, it is a resistor. The rectifier circuit 20b is a (rectifier) element that allows a current to flow only in a certain direction, and converts AC (alternating current) into DC (direct current). The DC / DC circuit 20c generates the required voltage in the circuit.

The inrush current delay circuit 21 includes an inrush prevention circuit 21a, a rectifier circuit 21b, a timer circuit 21c, and a SW (Switch) 21d. Since the inrush prevention circuit 21a and the rectifier circuit 21b have the same functions as the inrush prevention circuit 20a and the rectifier circuit 20b described above, the description thereof will be omitted.

The timer circuit 21c activates a timer set to measure the timing of inputting the inrush current based on the instruction of inputting the inrush current from the monitoring device 4, and when a timeout occurs, the timer circuit 21c inputs the inrush current to the main power supply circuit 20. Turn on SW21d. That is, the terminal 3 inputs the inrush current when the activated timer circuit 21c times out.

Further, the timer circuit 21c transmits a response to the effect that the inrush current is applied to the main power supply circuit 20 after the SW21d is turned on and the inrush current is applied to the main power supply circuit 20. That is, after the inrush current is applied, the terminal 3 transmits a response to the effect that the inrush current is applied to the monitoring device 4.

The SW21d is a switch for passing an inrush current to the main power supply circuit 20, and is in an off state in the initial state before the inrush current flows. Flow to 20. That is, when the inrush current is received, the inrush current does not flow to the SW21d but flows to the inrush prevention circuit 21a.

Next, an example of the 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 receiving unit 30, a measuring unit 31, and a current input unit 32. note that. 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 breaker 2 side and corresponds to the inrush prevention circuit 21a and the rectifier circuit 21b.

The measuring unit 31 receives the inrush current input instruction from the monitoring device 4, and measures the inrush current input timing based on the input instruction from the monitoring device 4, and corresponds to the timer circuit 21c.

The current input unit 32 applies an inrush current to the main power supply circuit 20 according to the measurement result by the measurement unit 31, that is, the timeout, and corresponds to the SW21d.

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 / F44, an inrush current delay control I / F45, and a bus 46.

The CPU 40 reads a program (for example, a monitoring program) for performing various processes of the monitoring device 4 stored in the memory 41 or the like via 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, data necessary for the processing of the monitoring device 4, and the like.

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

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

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

The inrush current delay control I / F45 transmits an inrush current input instruction to the terminal 3, and when a response is received thereafter, transmits an inrush instruction to another terminal 3 (or a group including the other terminal 3). Is what you do.

The bus 46 is a path that mediates the transfer 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 in the embodiment will be described with reference to FIG.

As shown in FIG. 5, in the terminal 3, when AC is supplied to the terminal 3 (S501), the 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), the monitoring device 4 transmits an inrush current input instruction to the terminal 3 of a certain group (S504). At this time, the monitoring device 4 activates a preset timer at the same time as transmitting the closing instruction, and starts timer measurement (time counting).

When the terminal 3 receives the input instruction from the monitoring device 4, the terminal 3 activates a preset timer and starts timer measurement (S505). When the set timer times out, the terminal 3 turns on SW21d of the inrush current delay circuit 21 in order to input the inrush current to the main power supply circuit 20 (S506), and indicates that the inrush current is input to the main power supply circuit 20. That is, a response indicating that SW21d is turned on is transmitted to the monitoring device 4 (S507).

When the monitoring device 4 receives the response from all the terminals 3 in a certain group, the monitoring device 4 transmits an inrush current input instruction to the terminals 3 in another group (S508). If the monitoring device 4 does not receive a response from all the terminals 3 in a certain group at the stage when the set timer times out after starting the timer measurement, the monitoring device 4 does not receive a response from the terminal 3 to the input instruction. Display (error display) to that effect. An example of the error display is shown in FIG.

As shown in FIG. 6, the response status is displayed for each group on the screen 60. In this example, group 1 and group 2 are shown, and the number of terminals 3 belonging to each group is 10. As an example of the display configuration of the screen 60, a group name column 61, a terminal number and response status column 62, an error presence / absence column 63, and a comment column 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. Further, in the terminal number and the response status column 62, the terminal number (identification number) assigned to each terminal and the determination of the response to the input instruction are shown. For example, since the terminal 3 of the terminal number 300001 of the group 1 has received a response to the input instruction, the response state is OK. On the other hand, since the terminal 3 of the terminal number 3000014 of the group 2 did not respond to the input instruction, the response state is NG. As a result, it can be grasped that the terminal 3 of the terminal number 3000014 of the group 2 is not responding.

Further, in the error presence / absence column 63, the presence / absence of an error is indicated, and if there is no error, a display indicating 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 3000014 of the group 2 described above did not respond to the input instruction, an error code (for example, E1234) indicating that there was no response is displayed. The error code depends on the content of the error.

Further, in the comment column 64, the details of the error content and the like are shown. For example, in the case of the terminal 3 of the terminal number 3000014 of the group 2 described above, it is displayed that there was no response to the input instruction.

The group information that does not fit on 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.

By displaying the error as shown in FIG. 6, it is possible not only to grasp the terminal 3 that does not respond, but also to grasp the progress status.

Next, an example of the inrush current control process of the terminal 3 in the embodiment will be described with reference to FIG. 7.

When the breaker 2a at the base of the inrush current control system 1 and the breaker 2b below it are operated to turn on the current flow, 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-scale circuit, the inrush current that flows is small.

The terminal 3 determines whether or not the inrush current input instruction has been received from the monitoring device 4 (step S703). When the input instruction is received (Yes in step S703), the terminal 3 activates a preset timer (step S704). On the other hand, when the input instruction is not received (No in step S703), the terminal 3 waits for the input instruction.

The terminal 3 determines whether or not the timer has timed out (step S705), and if it times out (Yes in step S705), the terminal 3 has SW21d of the inrush current delay circuit 21 in order to input the inrush current to the main power supply circuit 20. Is turned on (step S706), and an inrush current is applied to the main power supply circuit 20. After that, the terminal 3 transmits a response to the effect that the SW21d is turned on (to the effect 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 the inrush current control process of the monitoring device 4 in the embodiment will be described with reference to FIG.

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

After transmitting the closing instruction, the monitoring device 4 activates a preset timer and starts timer measurement (step S803). The monitoring device 4 determines whether or not the timer started without receiving a response from all the terminals 3 in the group that sent the input instruction has timed out (step S804).

When the time-out occurs (Yes in step S804), the monitoring device 4 displays the above-mentioned error (step S805). As a result, it is possible to grasp which terminal 3 does not respond, and it is possible to detect a defect of the terminal 3 at an early stage.

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

The monitoring device 4 does not send an inrush current input instruction to the terminals 3 of another group after receiving the responses from all the terminals 3 of the group, but responds from a predetermined number of terminals 3 in the group. May be sent when the input instruction is received. As a result, the inrush current control system 1 can be started quickly.

Further, when the monitoring device 4 times out (Yes in step S804), the above-mentioned error display may be displayed and an inrush current input instruction may be transmitted to the terminals 3 of another group.

According to the inrush current control system 1 as described above, since the timing of inputting the inrush current can be changed by the timer circuit and the inrush current is dispersed, it is possible to reduce the false detection of overcurrent due to the inrush current. In addition, it is possible to omit turning on / off the breaker for each predetermined area, and it is possible to reduce the frequency of breaker failures.

Further, the above-described embodiment is not limited to the above-described one, and various changes can be made without departing from the gist of the embodiment.

1 Inrush current control system 2 Breaker 3 Terminal 4 Monitoring device 5b, 5c, 5d Network configuration 20 Main power supply circuit 20a Rectifier circuit 20b DC / DC circuit 21 Inrush current delay circuit 21a Inrush prevention circuit 21b Rectifier circuit 21c Timer circuit 21d SW
30 Power receiving unit 31 Measuring 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 field 62 Terminal number and response status field 63 Error presence / absence field 64 Comment field 65 Previous page button 66 Next page button

Claims (3)

It is an inrush current control system composed of a plurality of terminal devices through which an inrush current generated by turning on the power flows and a monitoring device for monitoring the plurality of terminal devices.
The monitoring device transmits an inrush current input instruction to each terminal device, and the monitoring device transmits the inrush current input instruction to each terminal device.
The terminal device, based on said on instruction starts a timer circuit for measuring the timing of introduction of the inrush current, it has rows on of the inrush current at a predetermined timing,
After applying the inrush current, the terminal device transmits a response to the effect that the inrush current has been applied to the monitoring device.
The monitoring device issues the input instruction for each group of the plurality of terminals divided into groups, and after receiving the response from all the terminal devices in the group or after a lapse of a predetermined time, the terminal device of another group. Send the above input instruction to
The monitoring device does not receive the response from all the terminal devices in the group, and when the predetermined time elapses, the monitoring device displays a screen to the effect that the response from the terminal device that did not receive the response did not occur. An inrush current control system characterized by The inrush current control system according to claim 1, wherein the terminal device applies the inrush current when the activated timer circuit times out. It is an inrush current control method in an inrush current control system including a plurality of terminal devices through which an inrush current generated by turning on the power flows and a monitoring device for monitoring the plurality of terminal devices.
A step in which the monitoring device transmits an inrush current input instruction to each terminal device, and
A step in which the terminal device activates a timer circuit that measures the timing of inputting the inrush current based on the input instruction, and inputs the inrush current at a predetermined timing.
After the inrush current is applied, a step of transmitting a response to the effect that the inrush current is applied to the monitoring device, and
The input instruction is given to each group of the plurality of terminals divided into groups, and the input instruction is given to the terminal devices of other groups after receiving the response from all the terminal devices in the group or after a predetermined time has elapsed. Steps to send and
The monitoring device does not receive the response from all the terminal devices in the group, and when the predetermined time elapses, the monitoring device displays a screen to the effect that the response from the terminal device that did not receive the response did not occur. Steps to do,
An inrush current control method characterized by having.

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