KR20210102017A - maintenance lift device for wireless track extension type - Google Patents

Abstract

The present invention relates to a technique capable of installing an extension track cable, extending from a track cable for wireless power supply, in a lift device that rises and lowers, and installing the same in the lift device without having a separate power conversion unit for the extension track cable, and, more particularly, to a technique for providing an induction coupler using the track cable for wireless power supply as a primary side and the extension track cable installed in the lift device as a secondary side, and allowing the induction coupler to induce a current on the secondary side from the current of the track cable as the primary side while rising and lowering in connection with the rising and lowering operations of the lift device, thereby providing the current to the extension track cable. According to the present invention, though the extension track cable having a movement pattern that is mechanically independent of a main track cable is connected to the main track cable in a non-contact manner, a synchronization cable for a high-frequency current flowing in the extension track cable and a high-frequency current flowing in the main track cable or a communication cable therefor or the like can be removed.

Description

Maintenance lift device for wireless track extension type

The present invention relates to a technology for installing an extended track cable extending from a track cable for wireless power supply in a lift device for elevating and lowering it, but enabling installation in the lift device without a separate power conversion unit for the extended track cable.

More specifically, the present invention is provided with an induction coupler having a track cable for wireless power supply as a primary side and an extended track cable installed in a lift device as a secondary side, and the induction coupler interlocks with the elevating operation of the lift device. It relates to a technique for inducing a secondary current from a primary current of a track cable while ascending and descending and providing it to an extended track cable.

Since the so-called OHT (overhead hoist transfer), which transports a plurality of vehicles in the state installed at the top of the building, is installed at a height of about 3 to 5 m, in order to regularly maintain the vehicles, the workers must remove the vehicles from the OHT. Temporarily descend to a height (eg 0 m to 1.5 m) within the control of the

As such, in order to sequentially lower the bogies for regular maintenance in OHT (overhead hoist transfer), a separate lift device capable of operating in conjunction with the OHT is required.

[Figure 1] is an exemplary view showing a maintenance lift apparatus according to the prior art. Referring to [Fig. 1], in the prior art, when one or more OHT bogies 1 move in the main track cable 10 and preventive maintenance is required, the OHT bogie 1' for preventive maintenance is a lift unit 40. After moving toward the side, it descends as in [Fig. 1] according to the descending operation of the lift unit 40, and when the preventive maintenance is completed, the main track cable 10 ) can be followed.

Here, the OHT bogie 1 moving on the main track cable 10 operates by being supplied with non-contact power from the main track cable 10 , and for this purpose, the high frequency inverter 20 is connected to the main track cable 10 . It is configured to pass a high-frequency current to the log main track cable (10).

At this time, even when the OHT bogie 1' is mounted on the lift unit 40, since power must be supplied to the OHT bogie 1', the lift unit 40 has the same pattern as the main track cable 10. Tinance lift track cables 30 are installed.

However, since the lift unit 40 must operate in the vertical direction in a state that is mechanically independent from the main track cable 10, the maintenance lift track cable 30 installed in the lift unit 40 is also the main track. It is arranged in a form independent of the cable 10 .

As a result, in order for the maintenance lift track cable 30 to receive a high frequency current separately from the main track cable 10 , the maintenance lift track cable 30 separately from the high frequency inverter 20 on the main track cable 10 . ), there is a problem in that the maintenance lift inverter 50 for supplying high-frequency current must be provided.

In addition, since the main track cable 10 has an independent structure to receive a high frequency current from the high frequency inverter 20 and the maintenance lift track cable 30 receives a high frequency current from the maintenance lift inverter 50 , the main Synchronization between the high-frequency current flowing in the track cable 10 and the maintenance lift track cable 30 and communication for the synchronization is also required.

As a result, there is also a problem in that separate cables for synchronization and communication must be connected between the high frequency inverter 20 and the maintenance lift inverter 50 .

As such, since the configuration for supplying the high-frequency current to the main track cable 10 and the configuration for supplying the high-frequency current to the maintenance lift track cable 30 are made of independent and separate configurations, for example, around the lift unit 40, A large number of cables such as a power supply cable 61 or a communication cable 62 should be provided.

At this time, since the lift unit 40 raises and lowers as in [FIG. 1], a problem occurs that the durability of the cable is deteriorated while a large number of cables are folded and unwound.

Accordingly, by excluding the pattern that the maintenance lift track cable mounted on the lift unit receives a high-frequency current through a separate maintenance lift inverter, and configuring it to receive a high-frequency current from the high-frequency inverter like the main track cable, It is required to implement a technology capable of solving the problems of the prior art.

The present invention has been proposed in view of the above, and an object of the present invention is to extend the secondary current induced from the primary current of the main track cable in the lift unit without a separate power conversion unit (eg, a high frequency inverter). An object of the present invention is to provide a maintenance lift device of a wireless track extension type that can be provided to a track cable.

Another object of the present invention is to provide a maintenance lift apparatus of a wireless track extension type capable of significantly reducing the amount of cables that may be required to supply a high frequency current to an extension track cable in a lift unit.

In order to achieve the above object, the maintenance lift device of the wireless track extension type according to the present invention flows a current supplied from the outside and wirelessly supplies power to the OHT bogie mounted on its own in a non-contact length direction. to the extension track cable 110 for movably interfacing the OHT bogie; The extension track cable 110 and the lift unit 120 vertically moving in the vertical direction while supporting the OHT bogie to be buoyant in the air; In a state connected to the side of the lift unit 120 , it is responsible for inducing the secondary current from the primary current of the main track cable that passes through its interior in a non-contact state, and is linked to the vertical movement of the lift unit 120 in the vertical direction of the lift unit. Inductive coupler 130 that moves in a non-contact manner with respect to the main track cable along the longitudinal direction of the main track cable in a stationary state while moving in the vertical vertical direction together with the 120; In a state wound around the inductive coupler 130 , its both ends are connected to both ends of the extension track cable 110 , respectively, and an extension induction wire that transmits the secondary-side current induced by the induction coupler 130 to the extension track cable 110 . (140);

Here, the inductive coupler 130, the first core block 131; a second core block 132 disposed to face the first core block 131; a first outer bridge 133 connecting one end of the first core block 131 and one end of the second core block 132; a second outer bridge 134 disposed to face the first outer bridge 133 and connecting the other end of the first core block 131 and the other end of the second core block 132; A middle bridge 135 connecting the first core block 131 and the second core block 132 between the first outer bridge 133 and the second outer bridge 134 may be provided.

And, the caterpillar type for the first partition space corresponding to between the first outer bridge 133 and the middle bridge 135 and the second partition space corresponding to the second outer bridge 134 and the middle bridge 135 As the inductive coupler 130 operates to maintain the main track cable made of a non-contacting state, the inductive coupler 130 may be configured to induce a secondary current from the primary current flowing in the main track cable.

On the other hand, as the high-frequency current is connected to both ends of the primary-side high-frequency cable through which the high-frequency current flows, the current flowing in the primary-side high-frequency cable flows vertically downward and is inserted into the inductive coupler 130 through the first compartment space, and then the middle bridge 135 based on Main track extension cable 210 forming a crawler shape in the vertical up and down directions as it is turned vertically upward and is inserted again into the induction coupler 130 through the second partition space; An upper fixing holder 220 for fixing the main track extension cable of the portion corresponding to the upper limit of the induction coupler 130 in the vertical movement range of the induction coupler 130 to the outside; The main track extension cable of the portion corresponding to the lower limit of the induction coupler 130 in the vertical vertical movement range of the induction coupler 130 so that the main track extension cable has tension in the longitudinal direction in cooperation with the upper fixing holder 220 A lower fixing holder 230 for fixing the to the outside; may be configured to further include.

Here, the extension track cable 110 has its one end (hereinafter, referred to as 'target one end member') and its other end (hereinafter referred to as 'target other end member') fixed to one end of the target end in a single conducting line. A conductive wire having the member and the target other end member as each end may be formed of a multi-core pattern wound n times by itself.

And, as the target one end member and the target other end member are respectively connected to both ends of the extension guide line 140 , the extension track cable 110 is induced by the induction coupler 130 from the primary side current of the main track cable 240 . It can be configured to increase the secondary-side current n times.

On the other hand, as the primary side current corresponding to the secondary side current flowing through the extension track cable 110 flows and wirelessly supplies power to the bogie load mounted on it in a non-contact manner, the bogie load can move in its longitudinal direction. interfacing maintrack cable 240; a high frequency inverter 250 for supplying a high frequency current of a predetermined bandwidth to the main track cable 240 in a state connected to the main track cable 240; As the extension track cable 110 and the extension guide line 140 are connected to the main track cable 240, the inductance increased from the inductance of the main track cable 240 (hereinafter referred to as 'inductance increase value') corresponds to and a compensation capacitor 260 connected to the extension guide line 140 to compensate for the increased inductance value by resonating.

The present invention attaches an extension track cable that extends non-contact to a main track cable through which a high-frequency current flows on a lift unit that elevates and descends, and moves up and down in conjunction with the elevating and lowering of the lift unit, from the primary current of the main track cable to the secondary current. By having an induction coupler that induces and transmits to the extension track cable, it shows the advantage that an extension track cable that can be mounted on a lift unit can be implemented without a separate power conversion unit (eg, a high frequency inverter).

In addition, the present invention provides a synchronization cable between the high-frequency current flowing in the extension track cable and the high-frequency current flowing in the main track cable despite the non-contact connection of the extension track cable having a mechanically independent movement pattern to the main track cable to the main track cable. However, it also shows the advantage of being able to exclude a communication cable for this purpose.

In addition, since the synchronization cable or communication cable is not employed as described above, the cable is folded and unwound according to the elevation of the lift unit, thereby solving the problems of various cables being damaged.

[Figure 1] is an exemplary view showing a maintenance lift device according to the prior art,
[FIG. 2] is an exemplary view showing a maintenance lift device of a wireless track extension type according to the present invention;
[FIG. 3] is an enlarged schematic cross-section of an inductive coupler, which is a configuration of the present invention.
[Figure 4] is a schematic enlarged view of an extension track cable, which is a configuration of the present invention,
[Figure 5] is an exemplary view schematically showing a maintenance lift apparatus according to the present invention and displaying the flow of current for each section;
[FIG. 6] is a view showing a state in which a compensation capacitor is installed on the extension lead wire in [FIG. 5];
[Fig. 7] is an exemplary diagram modeled as a schematic circuit diagram by extracting the compensation capacitor part from [Fig. 6].

Hereinafter, the present invention will be described in detail with reference to the drawings.

[Fig. 2] is an exemplary view showing a maintenance lift device of a wireless track extension type according to the present invention, and [Fig. 3] is an enlarged schematic cross-section of an inductive coupler, which is a configuration of the present invention. and [FIG. 4] is a schematic enlarged view of an extension track cable, which is a configuration of the present invention.

2 to 4 , the maintenance lift device of the wireless track extension type according to the present invention includes an extension track cable 110 , a lift unit 120 , an induction coupler 130 , and an extension guide wire. 140 may be included.

The extension track cable 110 flows the secondary-side current induced by the inductive coupler 130 when referring to [Fig. In the longitudinal direction of the OHT bogie (2') interfaces movably.

The lift unit 120 elevates and lowers in the vertical direction together with the extension track cable 110 mounted inside its own as shown in FIG. 2 .

At this time, the lift unit 120 moves in a non-contact manner along the longitudinal direction of the extension track cable 110 and lowers the OHT load 2 ′ supplied with power from the extension track cable 110 [ FIG. 2 ] Allows the operator located on the floor to perform preventive maintenance of the OHT load (2').

To this end, the lift unit 120 should be configured to be able to move vertically in the vertical direction while supporting the extended track cable 110 and the OHT bogie 2' in the air. A detailed description of the configuration and operation principle of the lift unit 120 for this purpose will be omitted.

Here, the lift unit 120 must move in the vertical direction. In this way, when the lift unit 120 moves in the vertical direction, the extension track cable 110 mounted inside the lift unit 120 must also move in the vertical direction. In this situation, there is a problem of how to apply a track current of the same level as the track current flowing through the main track cable 240 to the extension track cable 110 .

To this end, the induction coupler 130 is connected to the extension track cable 110, and the induction coupler 130 moves in conjunction with the movement of the lift unit 120 as in [Fig. 2] of the main track cable 240. It was configured to induce the secondary-side current from the primary-side current and deliver it to the extension track cable 110 .

Specifically, the inductive coupler 130 is connected to the side of the lift unit 120 as shown in [Fig. 2] and passes through its interior in a non-contact state from the primary current of the main track cable 240 to the secondary current. It is responsible for induction and may be configured to move in the vertical vertical direction together with the lift unit 120 in association with the vertical vertical movement of the lift unit 120 .

As such, as the inductive coupler 130 moves in the vertical direction in a non-contact manner with respect to the main track cable 240 in the longitudinal direction of the main track cable 240 in a stationary state, one of the main track cables 240 naturally A secondary current may be induced in the inductive coupler 130 .

To this end, the inductive coupler 130 includes the first core block 131, the second core block 132, the first outer bridge 133, the second outer bridge 134, and the middle bridge as shown in FIG. As the 135 is provided, the main track extension cable 210 in the form of an endless track can pass through as in [Fig. 2], for example, the first compartment S1 and the second compartment as shown in Fig. 3 A space S2 was provided.

In detail, the first core block 131 may be configured in the form of one block as shown in FIG. 3 . In addition, the second core block 132 may also be formed in a shape similar to that of the first core block 131 as shown in FIGS. 2 and 3 and disposed to face the first core block 131 .

Subsequently, the first outer bridge 133 may be configured to connect one end of the first core block 131 and one end of the second core block 132 as shown in FIGS. 2 and 3 . have.

At this time, the second outer bridge 134 may be formed in a shape similar to that of the first outer bridge 133 as shown in FIGS. 2 and 3 and disposed to face the first outer bridge 133, and It may be configured in a form that connects the other end of the first core block 131 and the other end of the second core block 132 .

In addition, the middle bridge 135 is formed in a shape similar to that of the second outer bridge 134 as shown in FIGS. 2 and 3 , and is formed between the first outer bridge 133 and the second outer bridge 134 . It may be configured in the form of connecting the first core block 131 and the second core block 132 in the .

Here, in order to describe the specific structure of the inductive coupler 130 , the first core block 131 , the second core block 132 , the first outer bridge 133 , the second outer bridge 134 , and the middle bridge 135 . ) is separately described and illustrated, but the entire induction coupler 130 may be configured as a single body, and the first core block 131 , the first outer bridge 133 , the second outer bridge 134 , and the middle bridge 135 . ) may be implemented in a form in which the second core block 132 is joined after the one-body configuration.

In this case, the first partition space S1 corresponding to between the first outer bridge 133 and the middle bridge 135 and the second partition space S2 corresponding to the space between the second outer bridge 134 and the middle bridge 135 . ) of the main track cable 240 or the main track extension cable 210 connected to the main track cable 240 made of a caterpillar type with respect to the inductive coupler 130 ) may be configured to operate in the vertical direction.

As a result, it is possible to induce a secondary-side current in a non-contact state with the inductive coupler 130 from the primary-side current flowing through the main track cable 240 and the main track extension cable 210 .

On the other hand, the extension guide line 140 is wound around the middle bridge 135 of the induction coupler 130 a plurality of times as in [Fig. 2], and both ends thereof may be connected to both ends of the extension track cable 110, respectively. .

As a result, the extension guide line 140 can transmit the secondary-side current induced by the inductive coupler 130 to the extension track cable 110 .

[Fig. 4] is a schematic enlarged view of an extension track cable, which is a configuration of the present invention, and [Fig. 5] schematically shows a maintenance lift device according to the present invention and displays the flow of current for each section. It is also an example.

Referring to [Fig. 2] and [Fig. 4], the extension track cable 110 has its one end (hereinafter, referred to as 'target one end member: 111a') and its other end (hereinafter, 'target') in one conducting line. In a state where the other end member: 111b') is fixed, the conducting wire having the target one end member 111a and the target other end member 111b as each end is self-winding n times as in [Fig. 4] in a multi-core pattern. can be configured.

Here, n is not limited to a natural number and may consist of the sum of a natural number and a prime number, such as 1.5.

At this time, as the target end member 111a and the target other end member 111b of the extension track cable 110 are respectively connected to both ends of the extension guide line 140 as in [Fig. 2] and [Fig. 4], the extension track The cable 110 may increase the secondary-side current induced by the inductive coupler 130 from the primary-side current of the main track cable 240 n times.

On the other hand, when the extension induction wire 140 is wound m times as in [Fig. 2] on the inductive coupler 130, the secondary current induced by the inductive coupler 130 as in [Fig. 5] is the main track cable ( 240) is reduced to 1/m compared to the current flowing through it.

That is, as in [Fig. 5], the primary-side current (i _{1 ) flowing in the main track cable 240 is 80A and the number of turns (N core} ) of the extension induction wire 140 for the inductive coupler 130 is 8 turns. _{The secondary-side current (i 2} ) induced by the rear inductive coupler 130 is 1/8 of 80A, which is 10A.

Here too, m is not limited to a natural number, and may consist of a sum of a natural number and a prime number, such as 1.5. This may be a case in which the extension guide wire 140 is wound 1.5 turns on the induction coupler 130, such as 1.5 turns.

_{Next, the number of windings (N cable} ) in which the conducting wire having the target end member 111a and the target other end member 111b of the extension track cable 110 as each end is wound by itself as in [Fig. If is 8 turns, the secondary-side current (i ₂ ) of 10A increases 8 times on the extension track cable 110, and as a result, the current (i) of 80A equal to the _{primary-side current (i 1 ) on the main track cable 240 again 3} ) is spilled.

_{As such, by adjusting the number of windings (N core} ) wound on the inductive coupler 130 and the number of windings _{(N cable} ) wound on the extension track cable 110 by itself, the primary side current on the main track cable 240 (i _{1 ) ) can be induced as a current (i 3} ) flowing on the extension track cable 110 _{as it is, while passing a relatively low current (i 2} ) in the process of passing through the inductive coupler 130 and the extension induction wire 140 . Accordingly, it is possible to suppress heat generation due to resistance in the inductive coupler 130 .

On the other hand, the maintenance lift device of the wireless track extension type according to the present invention is a main track extension cable 210, an upper fixed holder 220, a lower fixed holder 230, a main track cable 240, a high frequency inverter ( 250) may be further included.

As the main track extension cable 210 is connected to both ends of the main track cable 240 as a primary high-frequency cable through which a high-frequency current flows as in [Fig. 2] and [Fig. 3], the current flowing in the main track cable 240 is After being inserted into the induction coupler 130 through the first partition space (S1) vertically downward as in [Fig. 2], turning as in [Fig. 2] based on the middle bridge 135 on [Fig. 3] As the induction coupler 130 is fitted again through the second partition space S2 vertically upward, the main track extension cable 210 forms an endless track in the vertical direction.

The upper fixing holder 220 is the main track extension cable 210 of the portion corresponding to the upper limit of the upper limit of the induction coupler 130 as in [Fig. 2] in the vertical vertical movement range of the induction coupler 130 to the outside. Fix it.

The lower fixing holder 230 is guided as in [Fig. 2] in the vertical vertical movement range of the induction coupler 130 so that the main track extension cable 210 has tension in the longitudinal direction in cooperation with the upper fixing holder 220. The main track extension cable 210 of the portion corresponding to the lower limit than the lower limit of the coupler 130 is fixed to the outside.

As such, as in [Fig. 2], the induction coupler 130 is taut in the vertical direction as the upper fixing holder 220 and the lower fixing holder 230 tightly fix the main track extension cable 210 in the vertical direction. After being fitted to the main track extension cable 210 in a non-contact state, as long as the induction coupler 130 moves in the vertical vertical direction, the induction coupler 130 maintains a non-contact state with the main track extension cable 210 and the It is possible to induce a secondary-side current from the primary-side current flowing through the main track extension cable 210 .

_{At this time, in the main track cable 240, the primary side current (i 1} ) on [Fig. 5] corresponding to the secondary side current flowing in the extension track cable 110 flows and is a bogie load mounted on its own non-contact [Fig. 2] By wirelessly supplying power to the OHT bogie 2 on the top, the OHT bogie 2 interfaces movably in its longitudinal direction.

And, the high-frequency inverter 250 is configured to supply a high-frequency current of a predetermined bandwidth to the main track cable 240 while being connected to the main track cable 240 as shown in FIGS. 2 and 5 .

[Fig. 6] is a view showing a state in which the compensation capacitor is installed on the extension lead wire in [Fig. 5], and [Fig. 7] is an exemplary diagram modeled as a schematic circuit diagram by extracting the compensation capacitor part from [Fig. 6].

6 and 7 , the wireless track extension type maintenance lift device according to the present invention may further include a compensation capacitor 260 .

The compensation capacitor 260 may be mounted on the extension guide line 140 as shown in FIGS. 6 and 7 .

That is, the inductance increased from the inductance of the main track cable 240 due to the connection of the extension track cable 110 and the extension guide line 140 to the main track cable 240 (hereinafter referred to as 'inductance increase value'). is compensated by the compensation capacitor 260 .

For example, the high-frequency inverter 250 in [FIG. 5] applies a high-frequency current to the main track cable 240 so that optimum resonance can occur on the main track cable 240 in consideration of the inductance value of the main track cable 240. shedding

By the way, although the extension guide line 140 and the extension track cable 110 are connected to the main track cable 240 through the induction coupler 130 as a medium, the high frequency inverter 250 mains the high frequency current in a pattern set in the first place. It flows through the track cable (240).

As a result, in addition to the inductance on the main track cable 240 , the self-inductance value on the cable corresponding to the extension guide line 140 and the extension track cable 110 increases, so that the high frequency current supplied from the high frequency inverter 250 is extended. In order to properly resonate even in the guide wire 140 or the extension track cable 110, the capacitance corresponding to the 'inductance increase value' must be compensated.

To this end, a compensation capacitor 260 is mounted on the extension guide line 140 as shown in FIGS. 6 and 7 .

Meanwhile, as shown in FIG. 7 , the size C of the compensation capacitor 260 may be expressed by the following equation.

(Here, C represents the 'compensation capacitor 260', f represents the frequency, and L ₁₁₀ represents the 'inductance increase value' corresponding to the extension guide line 140 and the extension track cable 110 .)

1, 1', 2, 2' : OHT Balance
10: main track cable
20: high frequency inverter
30: maintenance lift track cable
40: lift unit
50: maintenance lift inverter
61: power supply cable
62: communication cable
110: extension track cable
111a: element wire one end member
111b: other end member of the bare wire
112: cloth
120: lift unit
130: inductive coupler
131: first core block
132: second core block
133: first outer bridge
134: second outer bridge
135: middle bridge
140: extension guide line
210: main track extension cable
220: upper fixing holder
230: lower fixing holder
240: main track cable
250: high frequency inverter
260: compensation capacitor
S1: first compartment space
S2: second compartment space
T : terminal box

Claims (5)

An extension track cable 110 for movably interfacing the OHT bogie in its longitudinal direction as the electric current supplied from the outside flows and wirelessly supplies power to the OHT bogie mounted on the OHT bogie in a non-contact manner;
The extension track cable 110 and the lift unit 120 vertically moving in the vertical direction while supporting the OHT bogie to be buoyant in the air;
In a state connected to the side of the lift unit 120, it is responsible for inducing the secondary current from the primary current of the main track cable that passes through its interior in a non-contact state, and is linked to the vertical vertical movement of the lift unit 120. an induction coupler 130 that moves in a non-contact manner with respect to the main track cable along the longitudinal direction of the main track cable in a stationary state while moving vertically together with the lift unit 120;
Both ends thereof are respectively connected to both ends of the extension track cable 110 in a state wound around the inductive coupler 130 , and the secondary-side current induced by the inductive coupler 130 is transmitted to the extension track cable 110 . an extension guide line 140;
A wireless track extension type maintenance lift device comprising a.
The method according to claim 1,
The inductive coupler 130,
a first core block 131;
a second core block 132 disposed to face the first core block 131;
a first outer bridge 133 connecting one end of the first core block 131 and one end of the second core block 132;
a second outer bridge 134 disposed to face the first outer bridge 133 and connecting the other end of the first core block 131 and the other end of the second core block 132;
a middle bridge 135 connecting the first core block 131 and the second core block 132 between the first outer bridge 133 and the second outer bridge 134;
to provide
Infinite for a first partitioned space corresponding to between the first outer bridge 133 and the middle bridge 135 and a second partitioned space corresponding to between the second outer bridge 134 and the middle bridge 135 . As the inductive coupler 130 operates so that the main track cable of the track type maintains a non-contacting state, the inductive coupler 130 induces a secondary current from the primary current flowing in the main track cable. A maintenance lift device of a wireless track extension type, characterized in that it is configured.
3. The method according to claim 2,
As the high-frequency current is connected to both ends of the primary-side high-frequency cable, the current flowing in the primary-side high-frequency cable flows vertically downwards through the first partition space and is inserted into the inductive coupler 130 and then the middle bridge 135. The main track extension cable 210 which turns into a reference and forms an endless track in the vertical direction as it is inserted again into the induction coupler 130 through the second partition space vertically upward;
An upper fixing holder 220 for fixing the main track extension cable of the portion corresponding to the upper limit of the induction coupler 130 in the vertical movement range of the induction coupler 130 to the outside;
The portion corresponding to the lower limit of the induction coupler 130 in the vertical vertical movement range of the induction coupler 130 so that the main track extension cable has tension in the longitudinal direction in cooperation with the upper fixing holder 220. a lower fixing holder 230 for fixing the main track extension cable to the outside;
A maintenance lift device of the wireless track extension type, characterized in that it further comprises a.
4. The method according to claim 3,
The extension track cable 110 has one end of the target (hereinafter referred to as 'target end member') and its other end (hereinafter referred to as 'target end member') in a state in which one end is fixed in one conductor line. The member and the conducting wire having the target other end member as each end is made of a multi-core pattern wound n times by itself,
As the target one end member and the target other end member are respectively connected to both ends of the extension guide line 140 , the extension track cable 110 is connected to the induction coupler 130 from the primary side current of the main track cable 240 . A wireless track extension type maintenance lift device, characterized in that it increases the secondary current induced by the n times.
5. The method according to claim 4,
A primary side current corresponding to the secondary side current flowing in the extension track cable 110 flows and wirelessly supplies power to the bogie load mounted on it in a non-contact interface so that the bogie load can move in its longitudinal direction a main track cable 240;
a high frequency inverter 250 for supplying a high frequency current of a predetermined bandwidth to the main track cable 240 while being connected to the main track cable 240;
As the extension track cable 110 and the extension guide line 140 are connected to the main track cable 240, the inductance increased from the inductance of the main track cable 240 (hereinafter referred to as 'inductance increase value'). a compensation capacitor 260 connected to the extension guide line 140 so as to compensate for the increased inductance value by resonating in response to a corresponding resonance;
A maintenance lift device of the wireless track extension type, characterized in that it further comprises a.

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