JP5438402B2 - Electric turning machine - Google Patents

Description

  The present invention relates to lightning damage countermeasures for an electric turning machine.

  As a turning machine, a machine equipped with an operation cane and a lock cane is generally employed. Such a switch is installed on the left or right side of the rail on which the branching device is installed, and has a mechanism in which the operating cannula and the locking cane are respectively connected to the tongler of the branching unit. The lock piece is moved from the side into the notch of the lock cane that moves with the tongue, and the lock cannot be operated, and thus the lock is completed.

  FIG. 1 shows an outline of an electric switch. As shown in FIG. 1, the electric switch 1 includes an operation lever 11, a lock lock 12, a servo motor 13, and a switch case 14. The circuit unit 15 in the switch case 14 includes a motor drive / control circuit for controlling the drive of the servo motor 13, a motor monitor circuit for monitoring the operation state and outputting it externally, and a signal indicating localization / reversal. The circuit controller etc. which output are mounted, and many electronic parts are used for these. A signal cable 18a and a motor power cable 18b are connected to the circuit unit 15 via connectors 17a and 17b. The circuit unit 15 is equipped with protectors 16a and 16b.

The switch machine housing 14 is in a conductive state with the rail via the operation cannula 11 and the lock cannula 12, and is grounded.
In addition to the danger of applying a surge voltage due to lightning, an electric switch has a danger of applying a high voltage due to the overhead wire supplying power to the train being broken due to a disaster and coming into contact with the rail.
Conventionally, as a countermeasure against lightning damage of an electric switch, a protector is connected between the input / output circuit of the electronic device using the electronic components in the switch and the switch case, and the electric switch is generated between them. Protected electronic components from surge voltage.

JP 2003-165440 A

However, the above conventional techniques have the following problems.
Although it is necessary to take measures against lightning damage to all the input / output lines connected to the electric switch 1 by the cable 18, between all these input / output lines and the switch case 14. When the protector 16 is connected, for example, after the protector 16 is short-circuited due to lightning, etc., and the lightning is lost, there is a possibility that the electric current for the train electric power will flow around the signal line due to the contact of the overhead line as described above. is there. Control signals and display signals are input to and output from the signal line.
Therefore, if the current suddenly goes around the signal line, the potential changes, and incorrect control signals and display signals are input and output, leading to an erroneous operation of the train operation system based on the erroneous control signals and display signals. There is a fear.

  The present invention has been made in view of the above problems in the prior art, and when a protector is short-circuited and failed, an error signal is not input to and output from the signal line, and the protector is used for the signal line. However, it is an object to provide an electric switch that has lightning damage countermeasures.

An invention according to claim 1 for solving the above-described problems includes an electric motor, a motor drive / control circuit for driving / controlling the electric motor, a motor monitor circuit for externally outputting an operation state of the electric motor, And a protective device that is grounded through a casing of the electric switch and discharges a surge current caused by lightning, and includes one or more electric cables including a power input line, a signal input / output line, and an empty line. A connected electrical switch,
The electric cable includes a monitor line that is connected to the motor monitor circuit and outputs an operating state of the electric motor to the outside.
Of the lines included in the electric cable, a protector is connected to the empty line and the monitor line, and the other lines are electric switches that are not connected to the protector .

According to a second aspect of the invention, other lines prior Kiho weaker unit disconnection state, the idle line and / or surge voltage induced in the voltage drop of the monitor circuit by the discharge of the surge current by the protective device is reduced The electric switch according to claim 1.

  A third aspect of the present invention is the electric switch according to the first or second aspect, wherein a power line and a control line of the electric motor are included as the other lines not connected to the protector.

  According to a fourth aspect of the present invention, a circuit controller that outputs a signal indicating localization / inversion is provided, and a power line and a signal output line of the circuit controller are included as other lines not connected to the protector. The electric switch according to claim 1, claim 2 or claim 3.

In the invention according to claim 5, a line excluding the empty line among lines included in the electric cable and an electronic circuit including the motor drive / control circuit and the motor monitor circuit are insulated by a relay or a transformer,
5. The voltage of a line excluding the empty line included in the electric cable is reduced to a surge withstand voltage or less by the relay or transformer due to the discharge of the surge current by the protector and the induction. An electric switch according to claim 1.

According to the present invention, the protector is connected to the vacant line and the monitor line among the lines included in the connected electrical cable, and the other lines not connected to the protector are vacant lines due to discharge of surge current by the protector. Since the surge voltage is reduced due to the voltage drop, the desired signal line is changed to another line not connected to the protector whose voltage drops due to this induction. There is an effect that lightning damage countermeasures are also applied to the signal line using a protector without causing an error signal to be input / output to / from the signal line.

It is a top view which shows the outline | summary of the switch machine which concerns on one Embodiment of this invention. It is a block diagram which shows the circuit part and input / output line of the switchboard concerning one Embodiment of this invention. It is a surge voltage (Vs) waveform figure applied to the experiment of this invention. Surge current showing experimental results of the present invention (Is) waveform and the protective device connection line (V _1), a voltage waveform diagram of the protector unconnected line (V _2).

  An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

In the present embodiment, the lightning damage countermeasure according to the present invention is applied to the electric switch 1 shown in FIG.
As shown in FIG. 1, the electric switch 1 includes an operation lever 11, a lock lock 12, a servo motor 13, and a switch case 14. The circuit unit 15 in the switch case 14 includes a motor drive / control circuit for controlling the drive of the servo motor 13, a motor monitor circuit for monitoring the operation state and outputting it externally, and a signal indicating localization / reversal. The circuit controller etc. which output are mounted, and many electronic parts are used for these. A signal cable 18a and a motor power cable 18b are connected to the circuit unit 15 via connectors 17a and 17b. The circuit unit 15 is equipped with protectors 16a and 16b. Further, a push button 19 for switching the power ON / OFF of the electric switch 1 is provided on the upper surface of the switch casing 14.
The switch machine housing 14 is in a conductive state with the rail via the operation cannula 11 and the lock cannula 12, and is grounded.
In addition to the danger of applying a surge voltage due to lightning, an electric switch has a danger of applying a high voltage due to the overhead wire supplying power to the train being broken due to a disaster and coming into contact with the rail.

  FIG. 2 shows the configuration and input / output lines on the circuit unit 15 of the switch. As shown in FIG. 2, a motor drive / control circuit 20, a motor monitor circuit 21, and a circuit controller 22 are mounted on the circuit unit 15. In addition, each contact 23 is provided to conduct to a predetermined electrode of the motor drive / control circuit 20 and the motor monitor circuit 21.

  The monitor line 31 is connected to the motor monitor circuit 21 via the transmission transformer 41. A protector 16 a is connected between the monitor line 31 and the switch case 14.

The motor power line 32 is connected to the motor drive / control circuit 20 and the motor monitor circuit 21 via a power transformer 42.
The switch protection power line 33 is connected to a predetermined contact of each contact 23 through a protection relay 43.
The control line 34 is connected to the motor drive / control circuit 20 and predetermined contacts of the contacts 23 via the push button 19 and the control relay 44.
The display power supply line 35 and KR 36 are connected to the circuit controller 22. The display power line 35 is a power line for the circuit controller 22, and KR 36 is a signal output line for the circuit controller 22.
The motor power line 32, the tip protection power line 33, the control line 34, the display power line 35 and the KR 36 are not connected to the protector.

  The empty line 37 is not connected to the electrical switch 1 or other circuits. However, the protector 16 b is connected between the vacant line 37 and the switch case 14.

  The motor power line 32 described above is configured in the motor power cable 18b shown in FIG. The other monitor line 31, switch protection power line 33, control line 34, display power line 35, KR 36 and empty line 37 are configured in the signal cable 18a.

The lightning damage countermeasures in the present embodiment are as described above, and the following actions are used to cope with lightning surges.
The other lines 32 to 36 that are not connected to the protector are induced by the voltage drop of the vacant line 37 and / or the monitor line 31 due to the discharge of the surge current by the protectors 16a and 16b, and the surge voltage decreases.
An experiment supporting this effect is shown below.

FIG. 3 is a surge voltage waveform diagram applied to this experiment. This surge voltage waveform (Vs) is generated by a surge tester and applied to the protector connection line and the protector non-connect line arranged in parallel to each other, and the voltage (V ₁ ) of the protector connection line and the The change in the voltage (V ₂ ) of the connection line and the change in the surge current (Is) were measured. The measurement result was as shown in FIG.

As shown in FIG. 4, the surge current (Is) decreases due to the protector discharge, and the voltage (V ₁ ) of the protector connection line also decreases. Further, it was confirmed that the voltage (V ₂ ) of the protector non-connection line was lowered due to the decrease of the voltage (V ₁ ) of the protector connection line.

  If a protector is connected to a part of the lines as described above, the other lines arranged in parallel to the lines are also induced by the principle of induction between parallel conductor currents, and the voltage drops. Using this, lightning damage countermeasures are taken for all the lines 31 to 36. Since the vacant line 37 is not connected to the circuit, it is not necessary to take measures against lightning damage itself, but it is used as the original conductor that causes the above-mentioned guidance. In addition, since there is no control based on the output signal of the monitor line 31 in train operation, the monitor line 31 is used as an original conductor for causing the above-mentioned guidance while taking measures against lightning damage by a protector.

Whether induction occurs depends on the gap between lines and the nature of the intervening material. It is preferable that the line connected to the protector and the line that reduces the surge voltage by induction without being connected to the protector are arranged close to each other. Therefore, these lines are configured with the same cable, or when they are configured with different cables, both cables are arranged close to each other.
Moreover, it is preferable not to interpose the material which inhibits induction | guidance | derivation, such as an electromagnetic shielding member, between lines.

After deciding the cable configuration, measure how much the voltage drop effect can be obtained by experimenting in advance, and select all the discharge voltage of the protector so that the necessary voltage drop effect can be obtained as a whole. Take necessary lightning damage countermeasures for the used lines 31-36.
In the present embodiment, a relay or transformer is connected between the lines 31 to 36 excluding the empty line 37 and the electronic circuit including the motor drive / control circuit 20 and the motor monitor circuit 21 among the lines included in the electric cables 18a and 18b. And has a certain surge withstand voltage. All the lines 31 to 37 are insulated from the electronic circuit including the motor drive / control circuit 20 and the motor monitor circuit 21 at the position of the line B in FIG.
By setting the voltage of the lines 31 to 36 except for the empty line 37 included in the electric cables 18a and 18b to be lower than the surge withstand voltage by the relay or transformer due to the discharge and induction of the surge current by the protectors 16a and 16b. It can protect the electronic circuit of the electric switch from lightning surge.

For example, when the discharge start voltage of the protectors 16a and 16b is 2 kV, when all the potentials of the lines 31 to 36 can be suppressed to 10 kV or less when the surge voltage of 30 kV is applied, the surge withstand voltage by the relay or the transformer If the voltage is 10 kV, by adopting such a setting, the electrical switch that can protect the electronic circuit in the switch 1 from lightning surge voltage of 30 kV without breaking the insulation by the relay or the transformer. Can be configured.
According to the above setting, the protectors 16a and 16b have a withstand voltage of 2 kV, and can prevent the electric current for the electric train and the like from turning around from the machine housing 14 to the monitor line 31 up to a voltage load of 2 kV.

Even if the protectors 16a and 16b are short-circuited and broken, the lines 32 to 36 are not connected to the protector, so that it is possible to prevent erroneous signals from being input and output to these lines 32 to 36.
Since there is no control based on the output signal of the monitor line 31 in train operation, malfunction of the train operation system due to failure of the protector 16a can be prevented. The potential of the vacant line 37 does not affect the system operation, and causes no malfunction due to the failure of the protector.

DESCRIPTION OF SYMBOLS 1 Electric switch 11 Operation lever 12 Locking lock 13 Servo motor 14 Switch machine housing 15 Circuit part 16a, 16b Guard 17a, 17b Connector 18a Signal cable 18b Motor power cable 19 Push button 20 Motor drive / control Circuit 21 Motor monitor circuit 22 Circuit controller 23 Each contact 31 Monitor line 32 Motor power supply line 33 Flip protection power supply line 34 Control line 35 Display power supply line 36 KR
37 Free line 41 Transmission transformer 42 Power transformer 43 Protection relay 44 Control relay

Claims (5)

An electric motor, a motor drive / control circuit for driving / controlling the electric motor, a motor monitor circuit for outputting the operating state of the electric motor to the outside, and grounded via the casing of the electric switch, An electrical switch comprising one or two or more electric cables including a power input line, a signal input / output line, and an empty line, and a protector for discharging a surge current,
The electric cable includes a monitor line that is connected to the motor monitor circuit and outputs an operating state of the electric motor to the outside.
Of the lines included in the electrical cable, an electrical switch is provided in which a protector is connected to the empty line and the monitor line, and the other lines are lines not connected to the protector . Another line before Kiho weaker unit disconnection state, electrical of claim 1, wherein the free line and / or the monitor line induced surge voltage to the voltage drop of by the discharge of the surge current by the protective device is reduced Tumbler. The electric switch according to claim 1 or 2, wherein the other line not connected to the protector includes a power line and a control line of the electric motor. A circuit controller that outputs a signal indicating localization / reversal is provided, and a power line and a signal output line of the circuit controller are included as other lines not connected to the protector. Item 4. The electric switch according to Item 3. Between the lines included in the electrical cable, the lines excluding the empty line and the electronic circuit including the motor drive / control circuit and the motor monitor circuit are insulated by a relay or a transformer,
5. The voltage of a line excluding the empty line included in the electric cable is reduced to a surge withstand voltage or less by the relay or transformer due to the discharge of the surge current by the protector and the induction. The electric switch according to 1.

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