KR101015974B1 - Motor drive apparatus for a point machine in railroad - Google Patents

Abstract

The present invention relates to a motor drive device for an electric line changer for electrically switching a tap-off in a railroad. The motor driving unit of the three-phase MJ81 electric line changer currently used in a high-speed ship is a single-phase four-wire and a permanent capacitor and a starting capacitor It relates to a motor drive device for an electric line converter of a railway to significantly improve the starting torque. The present invention is a motor drive device for an electric line changer of a railway in which a forward rotation drive unit and a reverse rotation drive unit are separately provided in a motor drive unit for a single-phase MJ81 electric line changer to improve starting torque, processing speed, and adhesion of a line.

Railway, starting torque, motor,

Description

Motor drive apparatus for railroad electric line changer {Motor drive apparatus for a point machine in railroad}

The present invention relates to a motor drive device for an electric line changer for electrically switching a tap-off in a railroad. The motor driving unit of the three-phase MJ81 electric line changer currently used in a high-speed boat is a single-phase four-wire and a permanent capacitor and a starting capacitor are installed. It relates to a motor drive device for an electric line converter of a railway to significantly improve the starting torque.

Point machine is a device that is installed in the place where the line is branched and used to electrically switch the branch to change the course of the train.

Hereinafter, a conventional electric line converter will be described in detail with reference to the drawings.

In spite of the trend of increasing the speed of the current train, it is not possible to guarantee the high speed and safety of the train speed by using the NS type electric line changer introduced in the 1960s. There is a disadvantage that is difficult to maintain and handle. In addition, the conventional electric line converter is difficult to apply to the diverter of the existing line speed improvement or high speed line because the switching time is long.

Therefore, in the Korea Railroad Corporation, which is in charge of the operation and maintenance of domestic railways, as well as securing the working hours for maintenance of electric line changers as the number of train operation increases, the arrangement of train monitors is essential, but manpower for management reasons. I am experiencing many difficulties. Therefore, it is urgently needed to introduce a small, light and reliable electric line converter based on safety due to the speed improvement and the speed of the existing line.

The three-phase MJ81 type electric line changer used in the conventional high speed boat can be installed in a common sleeper, and it is small and light, and it is easy to maintain, and it can be applied to all domestic lines because of its high switching power and short switching time. As the power supplied to the existing line is given as 220Vac single phase, in order to use the MJ81 electric line converter in the existing line section, it is required to replace the power equipment for the single-phase power supply and the cable replacement work. Therefore, there was a need to localize the new electric line converter to replace the conventional NS type electric line converter for the 220V single-phase for the characteristics of the existing line.

In the meantime, the single phase 220V MJ81 electric line converter supplied by Cogifer of France was introduced, but localization through technology development is required for maintenance and advancement into the domestic and overseas market.

Conventional NS and NS-AM type electric line converters are the most widely used electric line converters in Korea and Japan, and the following table shows the characteristics of electric line converters by type.

division Korea Japan France form NS NS-AM MJ81 Development year 1964 1990 1981 Power source AC105 / 220 single phase AC105 / 220 single phase AC220 / 380 three phase Operating current 8.5A 8.5A 220V = 4A
380V = 1.5A Conversion 300 KG 400 KG 200-400 KG Transition time 6 6 5 Drive way Capacitor Starting Type
4-pole Condenser Start Type 4-pole Motor direct control clutch friction Electronic friction Sympathy Between operations: 185
Determination interval: 130-185 Between operations: 185
Determination interval: 130-185 110-260 Close and lock detection function radish radish U Turnout F8-F15 F8-F15 F18.5 ~ F65 weight 350 kg 350 kg 91 kg

1 is an installation diagram of a conventional NS type electric line converter.

Conventional NS type electric line converter is a condenser starting induction motor that can operate at a rated power of 0.35kW and 80% of the rated voltage, a bipolar, two-phase self-maintaining control relay having a DC24V 200mA 120kV pole and an AC110 / 220V 60Hz 18A contact capacity. Reduction gear with three-speed reduction structure consisting of one set of bevel gears and two sets of spur gears, inertia absorption when the motor stops rotating, a friction clutch that protects the motor against overload or interruption during switching, and a mechanical three-phase circuit controller It consists of a 60mm CAM-BAR identification and a switching device having a gap of 3mm between the grooves between the locks, and a manual switching device that can operate the electric line converter manually by blocking the motor circuit when inserting the manual handle.

The electrical and mechanical characteristics of the NS type electric line converter are as follows. The distance from the basic rail to the center of the electric line converter is 1,200 mm and is installed as shown in FIG. 1.

NS type electric line converter Rated voltage AC105 / 220V ㅁ 20% 60Hz Control relay voltage DC24V Operating current 7.5A or less Sympathy Between motions (185mm), between locks (130 ~ 185mm) Operating time  6 seconds or less Maximum switching power (governmental) 300kgf

2 is a diagram of an example in which a conventional NS-AM type electric line converter is installed.

The conventional NS-AM electric line converter shown in the drawing replaces a friction clutch sensitive to temperature changes, which is a problem of the conventional NS type, with a magnetic clutch, thereby improving reliability and protecting the motor when an overload or switching occurs. It's a modified form to do that.

The major components of model NS-AM are mostly similar to model NS, and some parts have been revised to improve maintenance efficiency. The biggest feature of this electric line converter is to absorb the motor inertia energy in order to protect the motor from damage in case of overload or failure of branch in the process of transmitting the output of the motor to the converter so as not to give excessive impact to the device at the end of the switchover. The non-contact magnetic clutch using permanent magnetic force was installed between the electric motor and the small umbrella gear. The characteristics of the conventional NS-AM type electric line converter are as shown in the following table, and the distance from the basic rail to the center of the electric line converter is 1,200 mm and is installed in the same form as the NS type.

NS-AM type electric line converter Rated voltage AC105 / 220V ㅁ 20% 60Hz Control relay voltage DC 24V Operating current 8.5 A or less Sympathy Between motions (220mm), between locks (130 ~ 240mm) Operating time  7 seconds or less Maximum switching power (governmental) 400kgf

The conventional NS and NS-AM electric line converters described in Figs. 1 and 2 described above have the disadvantage of having to perform clutch adjustment more than twice a year, with a long switching time, an increase in current consumption due to a single phase, and a voltage drop due to remote control. In addition, consideration should be given to the effects of the signal system on radix harmonics.

In addition, because NS uses friction clutch, clutch adjustment should be carried out twice a year. In case of severe temperature difference, maintenance is difficult depending on the degree of failure. There is a problem. In addition, due consideration should be given to the effects of signal drops due to voltage drops and odd harmonics.

3 is a view showing an installation example of a conventional MJ81 electric line converter.

The conventional MJ81 electric line converter was developed in 1981 as an electric line converter installed at the Gyeongbu high speed line and the existing line / high speed line connection unit. The MJ81 type converter was manufactured by Alstom and is now supplied by Cogifer, a branch maker in France. In Korea, Samsung SDS has been manufacturing domestic MJ81 since 2000 after transferring technology from Eukorail of France.

For safety, the MJ81's mechanical parts require the operation of a special key commutator that can stop the train by an onboard signal system during motor faults or adjustments. After a special lock key has been inserted into the electric line changer lock, these systems can be adjusted by holding the manual / auto changeover switch in manual position, which can be operated by an emergency manual change knob.

The electrical unit also consists of a power source to power the MJ81, a connector that is an internal changeover switch used for control and inspection purposes, and a thermal resistance used to facilitate the operation of the MJ81 during cold seasons. Thermal resistance is not required, but it is usually installed to prevent moisture from developing inside the MJ81 in humid winters. In France, it is mandatory to use only in some areas of high humidity in winter, but not in others. MJ81 manufactured in Korea has the same appearance and electrical characteristics as MJ81 manufactured in France by transferring technology from France when introducing the Gyeongbu High Speed Train.

SNCF Domestic MJ81 test value Applied Load (daN) 200 380 Wiring method △ Y △ Y Working voltage (V) 220 200 380 220 210 200 380 Average current (A) 3 2.6 1.35 2.9 to 1.5 3.0-1.4 2.9 to 1.3 1.2 ~ 0.9 Switch time (sec) 4.7 ≤4.5 4.4 3.52 3.56 3.59 3.47 Permissible Line Resistance of Winding (Ω) 21 18 50 Adjustable

In addition, the table below shows the characteristics of the MJ81 line converter.

 MJ81 electric line converter Supply power AC 3Φ 220 / 380V Wh 10% Indicator power DC 24V Conversion 200 daN (normal), 400 daN (maximum) Identifying line converter 110 to 260 mm Transition time 4.2 sec (200 daN at 260 mm symmetry) Operating current 4 A (at 220 V), 1.5 A (at 380 V) Line converter motor power consumption 700 W Motor changeover speed 2850rmp Control Cable Conductor Resistance 10 Ω or less (at 220 V), 30 Ω or less (at 380 V) weight 91 kg Body size L = 700mm, H = 215mm D = 476mm (including manual handle: 535mm), Use temperature -30 ℃ ~ + 70 ℃

In addition, Figure 4 is a view showing a motor drive unit for the MJ81 electric line converter of the conventional co-zip.

The conventional single phase motor of the co-zipper is composed of three wires: N (neutral / neutral), L '(Live), and L (Live). The capacitor is used continuously during start-up and normal operation using only one permanent capacitor. Operation method is forward rotation when N (Neutral / neutral line) and L '(Live) are connected, and reverse rotation when N (Neutral / neutral line) and L (Live) are connected.

 Since L 'and L lines operate selectively in the form of a switch, the actual power supply is a single phase of N and L.

The connection between the motor and the main body of the electric line converter is configured in such a way that three wires of blue, noir and brun are connected. The starting torque is 1.70 N.m and the maximum torque is 3.89 N.m.

As described above, the conventional MJ81 type requires additional equipment related to single-phase power in order to be applied to existing lines as it uses three-phase power, but short switching time and occurs in NS type electric line converters used in existing existing lines. Most of the problems that occur are eliminated. However, in terms of control and display functions, the NS type can be used without changing the existing interlocking device, but the MJ81 type has a problem in that the control circuit and facilities of the interlocking device need to be partially supplemented because the control and display methods are different from the existing methods.

In addition, there is a single-phase 220V MJ81 electric line converter supplied by Cogifer, France, but the starting torque is very low, and the problems of securing spare parts and consumables in operation and maintenance and analyzing solutions in case of defects are very high. As a result, a localized single-phase 220V MJ81 electric line converter is urgently needed.

The present invention has solved the above problems, the present invention after completing the development of a single-phase 220V motor that can be used in the MJ81 type electric line converter, equipped with the development product in a comprehensive test device to perform a total of 200,000 times of durability test In order to improve the performance of the motor for MJ81 electric line converter, the motor drive unit has been single-phase 4-wire and permanent capacitor and starter capacitor are installed to improve starting torque. It is an object to provide a device.

The present invention provides a motor drive device for an electric line changer of a railroad in which a forward rotation drive unit and a reverse rotation drive unit are separately installed in a motor drive unit for a single-phase MJ81 electric line changer applied to a high-speed railway to improve starting torque, processing speed, and line adhesion. It aims to provide.

In order to achieve the above object, a motor driving device for an electric line converter of a railway according to the present invention is connected to an electric line switch and a single-phase four-wire, and a forward rotation driving unit for processing forward rotation of the motor for driving the electric line converter. ; It is installed separately from the forward rotation drive unit is characterized in that it comprises a reverse rotation drive unit connected to the electric line converter and a single-phase four wires to process the reverse rotation of the motor.
Preferably, the forward rotation drive unit is composed of six terminals, the first terminal portion for switching the forward rotation of the motor, the first permanent capacitor connected to the first terminal portion, the first starting capacitor to improve the starting torque The reverse rotation driving unit includes six terminals, a second terminal unit for switching the reverse rotation of the motor, a second permanent capacitor connected to the second terminal unit, and a second starting unit for improving starting torque. It characterized in that it comprises a capacitor unit.

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Preferably, the first and second starting capacitor unit, the starting capacitor for improving the starting torque; And a voltage relay connected to the starting capacitor and opening / closing the terminal contact with the force generated by the magnetic force generated by the current flowing through the internal coil.

The MJ81 electric line converter applying the motor driving unit according to the present invention is compatible with any of the line converters because the internal parts are the same as the three-phase MJ81 electric line converters used in the high-speed line except for parts necessary for single-phase motors. There is this.

In addition, the starting torque is much better than that of the conventional single-phase MJ81 electric line converter supplied by Cogifer, France, and thus the switching performance of the branching machine is improved, and thus, it is advantageous to improve the speed and speed of the existing line.

In addition, the electric line converter applying the motor driving unit according to the present invention has an effect of improving the processing speed and excellent adhesion.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted.

The present invention provides a single-phase four-wire driving unit for the MJ81 electric line converter and installs a permanent capacitor, a starting capacitor, and a voltage relay to greatly improve starting torque, thereby achieving better performance than a conventional single-phase MJ81 electric line converter. It is a motor driving device for furnace converter.

5 is a view showing a motor driving unit for the MJ81 electric line converter of the present invention.

Referring to the drawings, the motor drive unit for the MJ81 electric line converter of the present invention is equipped with two driving units 100 and 200 for processing forward and reverse rotation, and each drive unit is U1, U2, Z1, and Z2 single phase four wires, It consists of a terminal portion 30 consisting of six terminals, a permanent capacitor (Permanent Capacitor) 40 and the starting capacitor unit 50, the starting capacitor unit 50 serves to greatly improve the starting torque A capacitor 52 and a voltage relay 54.

The voltage relay 54 opens and closes the contact by the force generated by the magnetic force generated by the current flowing through the coil, which is the internal moving part of the relay, and may use electromechanical and digital relay methods.

The starting capacitor unit 50 of the present invention is composed of a starting capacitor 52 and a voltage relay 54 to improve the starting torque to improve the speed, single phase 4-wire for mounting the starting capacitor unit 50 It consists of.

Single-phase four-wire of the motor driving unit (100, 200) is connected to the electric line converter main body using four wires of U1-blue, U2-brun, Z1-rouge, Z2-noir, the motor driving unit is a motor for the MJ81 electric line converter Is mounted on.

In addition, the motor driving unit of the present invention is provided with two driving units (100, 200) to process the forward and reverse rotation separately.

As described above, the conventional MJ81 electric line converter was transferred to France from the construction of Gyeongbu High Speed Railroad and completed localization.

The present invention can be used in a single-phase 220V MJ81 electric line converter, and the motor drive unit has improved performance than the conventional, the motor drive unit is made of a single-phase four-wire type to improve the performance of the motor for the MJ81 electric line converter, the starting capacitor unit (50 ), Maximize the starting torque to improve the processing speed and increase the line adhesion.

The table below compares the conventional motor of FIG. 4 and the motor to which the present invention is applied.

division Cozier motor Motor of the invention Remarks Power cable Single phase 3-wire 4-phase single phase * The present invention applies a high starting torque characteristic of three-phase by using a single-phase four-wire type to improve motor performance
Condenser Permanent capacitor
Use Permanent Capacitor Use Permanent Capacitor Mobile Capacitor: Unused Starting Capacitor: Used with Voltage Relay

* Maximize starting torque Starting torque 1.70 N.m 7.19 N.m Torque 3.89 N.m 4.08 N.m * Conclusion: The motor of the present invention outperforms the conventional co-zipper motor.

Referring to the table, the MJ81 electric line converter using the motor driving unit according to the present invention has a starting torque of 7.19 Nm and a maximum torque of 4.08 Nm, which has a high starting torque of three phases, which is superior to the motor of FIG. 4. Able to know.

Therefore, when the motor according to the present invention is mounted on the MJ81 electric line converter, the processing speed and switching power are improved, and the adhesion of the line is improved.

6 is a view showing an example of the MJ81 electric line converter to which the motor of the present invention is applied.

When the single-phase motor of the present invention is applied, although not shown in the drawings, the position of the motor anchor hole and the hole for mounting the starting capacitor are changed in the conventional MJ81 electric line converter.

So far, the configuration and operation of the embodiment of the present invention have been described. The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims but also by the equivalents of the claims.

1 is an installation diagram of a conventional NS type electric line converter.

Figure 2 is a diagram of an example of installing a conventional NS-AM type electric line converter.

3 is a view showing an installation example of a conventional MJ81 electric line converter.

4 is a view showing a motor drive unit for a conventional MJ81 electric line converter of the co-zip.

5 is a view showing a motor driving unit for the MJ81 electric line converter of the present invention.

6 is a diagram showing an example of an MJ81 electric line converter to which the motor of the present invention is applied.

<Description of Major Symbols in Drawing>

30: terminal part 40: permanent capacitor

50: mobile capacitor 52: mobile capacitor

54: voltage relay 100, 200: drive unit

Claims (5)

A forward rotation drive unit connected to an electric line converter and a single-phase four-wire and configured to process forward rotation of a motor for driving the electric line converter; And a reverse rotation drive unit installed separately from the forward rotation drive unit and connected to the electric line converter and single-phase four wires to process reverse rotation of the motor. The method of claim 1, The forward rotation drive unit, A first terminal portion consisting of six terminals for switching the forward rotation of the motor; And A first permanent capacitor connected to the first terminal part, The reverse rotation drive unit, A second terminal portion consisting of six terminals for switching the reverse rotation of the motor; And And a second permanent capacitor connected to the second terminal part. 3. The method of claim 2, The forward rotation driving unit includes a first starting capacitor to improve the starting torque, The reverse rotation drive unit is a motor drive device for an electric line changer of the railway, characterized in that it comprises a second starting capacitor for improving the starting torque. The method of claim 3, wherein The first and second starting capacitor unit, A starting capacitor for improving the starting torque; And And a voltage relay connected to the starting capacitor and opening and closing the terminal contact of the terminal part by a force generated by a magnetic force generated by an electric current flowing through an internal coil. The method of claim 1, The electric line converter is a motor drive device for an electric line converter of the railway, characterized in that it comprises a high-speed railway electric line converter.

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