KR20190134441A - wireless power transfer device of fault-ride-through type using balancing transformer - Google Patents

Abstract

The present invention relates to: wireless power transmission technology of a fault-ride-through type in which a plurality of power supply modules equally balance currents flowing through each track even when loads generated in each track are different in a wireless power transmitter for supplying power to a plurality of tracks; and technology in which a transformer mounted on an input end of each track equally balances currents flowing through each track when power from each power supply module is provided for each track even if loads on each track are different from each other. The present invention has an advantage of being able to adopt a transformer of a small size or low performance since currents can be supplied to pass through a track connection switch except currents induced by the balancing operation of the transformer in a situation of supplying power to all tracks through remaining power supply modules when any one of power supply modules stops working due to the provision of the track connection switch.

Description

Wireless power transfer device of fault-ride-through type using balancing transformer

The present invention provides a fault-ride-through type that equally balances the current flowing in each track even when the loads generated on the tracks are different from each other in a wireless power transmission device in which a plurality of power supply modules supply power to a plurality of tracks. Wireless power transfer technology.

More specifically, the present invention evenly balances the current flowing in each track by a transformer mounted at the input of each track when power from each power supply module is provided to each track even when the loads on the individual tracks are different from each other. It is a technique to do.

In particular, when one of the power supply modules stops operating, the low power balancing transformer is adopted to effectively balance the current flowing through the multiple tracks by supplying power to each track to the remaining power supply modules. It is a technique to do.

In general, a plurality of tracks that are wirelessly supplied with power while the truck is moved may be installed in plural according to the size of the space in which the trolleys are installed.

For example, [FIG. 1] is an exemplary view showing a wireless fail-over type transmission apparatus of a typical fail-over type, [FIG. 2] is an exemplary view showing a state in which the power supply module 1 has stopped operating in [FIG. 1], [ FIG. 3 is an exemplary diagram illustrating that when the load exceeding the capacity of the power supply module 1 is applied to the first track in FIG. 1, power supply corresponding to the excess load is impossible.

As shown in FIG. 1, one power supply module 1 (11) supplies power to one track 1 (10), and the other power supply module 2 (21) is connected to the other track 2 (20). It can be configured to supply power independently.

Here, when each power supply module 1, 2 (11, 21) is operating normally, the switch 1, 2 (12, 22) is turned on and the parallel connection switch 30 is configured to maintain a turn off state do.

At this time, if one power supply module 1 (11) stops as a failure as shown in FIG. 2, switch 1 (12) is turned off and switch 2 (22) remains turned on and the parallel connection switch (30) is As turned on, the first and second tracks 10 and 20 are configured in a so-called 'fail-over' type in which power is supplied from the power supply module 2 (21).

In the fail-over type wireless power transmission apparatus as shown in FIG. 3, when each power supply module 1, 2 (11, 21) operates normally, one track 1 (10) is one power supply module 1. The disadvantage is that it cannot exceed the maximum amount of power (eg 10 kW) that can be supplied from (11).

For example, a load (eg 15 kW) exceeding the maximum amount of power (eg, 10 kW) that can be supplied from one power supply module 1 (11) to one track 1 (10) occurs in one track 1 (10). In other words, when an excess number of trucks is located on one track 1 (10), all the trucks on the track 1 (10) cannot operate.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and an object of the present invention is to provide the same amount for each track even when the load generated in each track is different in a wireless power transmission device having a plurality of power supply modules and a plurality of tracks. The present invention provides a fault-ride-through wireless power transmission apparatus using a balancing transformer to allow a current to flow.

In addition, an object of the present invention is to supply a plurality of power supply even when more than the number of trucks that one power supply module can operate in a wireless power transmission device having a plurality of power supply modules and a plurality of tracks operates on one track. It is to provide a fault-ride-through wireless power transmission apparatus using a balancing transformer that can supply the amount of power required by the track from the total amount of power output from the module.

It is also an object of the present invention to provide a fault-ride-through type wireless power transmission apparatus using a balancing transformer that can effectively balance the current flowing in a plurality of tracks even through a low specification balancing transformer.

In order to achieve the above object, the present invention provides a fault-ride-through type wireless power transmission apparatus using a transformer that equally balances a current flowing in each of a plurality of tracks in response to different loads on a plurality of tracks. A first power supply module connected to one track (hereinafter, referred to as a “first track”) of the plurality of tracks for moving the vehicle to supply power to the first track in response to a load applied to the first track; A second power supply module connected to another track adjacent to the first track (hereinafter referred to as a 'second track') to supply power to the second track in response to a load applied to the second track; Disposed at the input end of the first track and the input end of the second track to supply current to the first track from the first power supply module and the second power supply module and to the second track from the first power supply module and the second power supply module. A transformer for balancing the supplied currents to be the same; From the second power supply module for the first track by switching on and off the parallel connection between the first track corresponding between the first power supply module and the transformer and the second track corresponding between the second power supply module and the transformer. And a track connection switch that controls the power supply of the power supply and controls the power supply from the first power supply module for the second track.

A first switch mounted on a first track corresponding between the first power supply module and the track connection switch to switch on / off control of power supplied from the first power supply module to the first track or the second track; A second switch mounted on a second track corresponding between the second power supply module and the track connection switch to switch on / off control of power supplied from the second power supply module to the first track or the second track; Can be configured.

In addition, a first inductor mounted on a first track corresponding between the transformer and the branch node of the first track to which the track connection switch is connected; A first capacitor resonating with the first inductor as connected in parallel to a first track corresponding between the first inductor and the transformer; A second inductor mounted on a second track corresponding between the branch node of the second track to which the track connection switch is connected and the transformer; And a second capacitor resonating with the second inductor as connected in parallel to a second track corresponding between the second inductor and the transformer.

On the other hand, a first track resonance capacitor mounted on a first track corresponding between the first inductor and the transformer and resonating with the inductance of the first track as connected in parallel with the first inductor and the first capacitor; And a second track resonance capacitor mounted in a second track corresponding between the second inductor and the transformer and resonating with the inductance of the second track as connected in parallel with the second inductor and the second capacitor. have.

According to the present invention, in a wireless power transmission device having a plurality of power supply modules and a plurality of tracks, a transformer is mounted at an input terminal of each track adjacent to each other even when loads generated in each track are different, so that the same amount of current is present in each track. It can be shown that the flow of each track can be operated.

In addition, according to the present invention, in a wireless power transmission apparatus having a plurality of power supply modules and a plurality of tracks, a transformer is mounted on an input terminal of each track adjacent to each other so that at least one truck supply module may be in charge. Even when operating on the track of the tracks of the total power output from the plurality of power supply module has the advantage that can supply the amount of power required by the track.

In addition, due to the current balancing operation of the transformer, a plurality of power supply modules can all supply the same average power regardless of the load difference appearing in the plurality of tracks, thereby increasing the reliability of the product.

In addition, the present invention also shows the advantage that it is not necessary to provide a separate control equipment for the current control of each track by mounting a transformer for current balancing of each track in the plurality of track input terminal.

In addition, the present invention is a track connection switch in addition to the current induced by the balancing operation of the transformer in the situation of supplying power to all the tracks through the remaining power supply module when the operation of any one of the power supply module is stopped due to the provision of a track connection switch It is also possible to supply a current through the circuit, which also shows the advantage of adopting a lower performance or smaller size transformer.

1 is a diagram illustrating a general fail-over type wireless power transmission apparatus;
2 is an exemplary view showing a state in which the power supply module 1 stopped operation in FIG. 1;
FIG. 3 is an exemplary view showing that when a load exceeding the capacity of the power supply module 1 is applied to the first track in FIG. 1, power supply corresponding to the excess load is impossible.
4 is a diagram illustrating a load exceeding the capacity of the first power supply module in the fault-ride-through type wireless power transmission apparatus using a balancing transformer according to the present invention, even when the load exceeds the first track. Illustrative diagram showing that the power supply is also possible,
5 is an exemplary view showing a fault-ride-through wireless power transmission apparatus using a balancing transformer according to the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5;
7 is an illustration showing the magnitude of the voltage applied to the first and second tracks corresponding to the transformer of the present invention from the load generated on the first track;
FIG. 8 is an exemplary view showing different supply power supplied to first and second tracks through a transformer of the present invention in response to different loads applied to first and second tracks of FIG. 5;
[Fig. 9] shows the different supply power supplied from the first and second power supply modules to the first and second tracks through the transformer of the present invention in response to different loads applied to the first and second tracks of [Fig. 8]. Nevertheless, an example showing a state where the currents of the first and second tracks are equally balanced.
FIG. 10 is an exemplary diagram illustrating a process in which power is supplied from the second power supply module to the first and second tracks as the operation of the first power supply module is stopped in FIG. 8.

In the present specification, the 'balancing transformer' refers to a current flowing in the first track 100 and flowing in the second track 200 while being disposed at each input terminal of each adjacent track (eg, the first track and the second track). It is a configuration to balance so that the currents remain the same.

That is, the balancing transformer excites the current in the second track 200 through the current flowing in the first track 100 between the first track 100 and the second track 200 which are adjacent to each other. As the current is excited to the first track 100 through the current flowing in the second track 200, the current flowing in the first track 100 and the current flowing in the second track 200 are equally balanced.

On the other hand, the present invention, for example, the second power supply module 210 of the first power supply module 110 and the second power supply module 210 for supplying power to the first track 100 and the second track 200. In the case where the operation of the power supply is stopped, the power supply from the first power supply module 110 is also supplied to the second track 200, thereby eliminating the upgrade of the specification of the 'balancing transformer' due to relying only on the 'balancing transformer'. It is necessary to provide a separate track connection switch for interfacing the current flows directly from the first track 100 to the second track 200 simultaneously with the current balancing between the first and second tracks 100 and 200.

As a result, the power supply from the first power supply module 110 excluding the second power supply module 210 is supplied to the first track 100 and the second track 200 even through a low specification 'balancing transformer'. In this way, current balancing between the first and second tracks 100 and 200 can be efficiently performed.

The present invention for implementing this will be described in detail below with reference to the drawings.

4 is a diagram illustrating a load exceeding the capacity of the first power supply module in the fault-ride-through type wireless power transmission apparatus using a balancing transformer according to the present invention, even when the load exceeds the first track. Figure 5 is an exemplary view showing that the power supply is possible, [FIG. 5] is an illustration showing a fault-ride-through type wireless power transmission apparatus using a balancing transformer according to the present invention, [FIG. 6] is [FIG. 5] Figure 7 is an enlarged view of a portion of the drawing, and [Fig. 7] is an exemplary view showing the magnitude of the voltage applied to the first and second tracks corresponding to the transformer of the present invention from the load generated on the first track.

4 to 6, the present invention relates to a fault-ride-through type using a transformer that equally balances current flowing through each of a plurality of tracks in response to respective different loads applied to the plurality of tracks. Wireless power transmission apparatus of the, may include a first power supply module 110, the second power supply module 210, transformer 310, the track connection switch 320.

First, in the present specification, the 'first track 100' and the 'second track 200' each wirelessly supply power to a trolley moving along them, and for this purpose, they each flow an AC provided from the outside. .

In addition, each of the capacitors and the inductors at the portions connecting the first and second power supply modules 110 and 210, the transformer 310, and the first and second power supply modules 110 and 210 and the transformer 310 may be connected to a conductor or an electrical pattern of the controller. Can be.

At this time, the conductive wire or the electric pattern of the control unit is distinguished from the 'first and second tracks 100 and 200' which wirelessly supply power to the vehicle.

However, in order to facilitate the description of each component of the present invention, the first track 100 is connected to the first power supply module 110 as shown in FIGS. 4 and 5. The first loop 120, the first inductor 130, the first capacitor 140, the first track resonance capacitor 150, the transformer 310, and the track connection switch 320 are connected to each other.

In addition, in the present specification, the second track 200 is connected to the second power supply module 210 as shown in FIGS. 4 and 5, and the second switch 220 and the second inductor 230. ), The second capacitor 240, the second track resonance capacitor 250, the transformer 310, the track connection switch 320 is connected to the closed loop.

The first power supply module 110 is connected to the first track 100 of one of the plurality of tracks for moving the bogie (not shown) as shown in FIGS. The first track 100 is supplied with power in response to the load applied thereto.

The second power supply module 210 is connected to the other second track 200 adjacent to the first track 100 as shown in FIGS. 4 and 5 to be caught by the second track 200. The second track 200 is supplied with power in response to the load.

Here, when the current flowing in the first track 100 and the second track 200 is the same, the bogie moving along the first track 100 or the second track 200 generates an output voltage proportional to the track current. I can move it.

To this end, the transformer 310 is supplied from the first power supply module 110 and the second power supply module 210 to flow through the first track 100 (I _{first track} ) and the first power supply module ( The first track 100 as shown in FIG. 4 and FIG. 5 such that the current (I _{second track} ) supplied from the 110 and the second power supply module 210 and flowing in the second track 200 are the same. ) And an input of the second track 200.

That is, the transformer 310 is disposed at the input terminal of the first track 100 and the input terminal of the second track 200 and is supplied from the first power supply module 110 and the second power supply module 210 to be provided with the first track. the current flowing through the (100) (I _{first track)} and the first power module 110 and the second is supplied from the power supply module 210, the current flowing in the second track (200), (I _{a second track)} mutually Balance to be the same.

For example, as shown in FIG. 6, when the bogie is located in the first track 100, the voltage source V _LOAD of a phase that interrupts the flow of the current (I _{first track} ) on the first track 100 is shown in FIG. 6. ] Can be modeled as occurring on the first track 100.

Here, the transformer 310 corresponds to a load having a size of 1 / 2V _load corresponding to half the size of the voltage source V _load on the first track 100 so that the current between the first and second tracks 100 and 200 does not vary. It hangs on the 1st track 100 so that it may have a code | symbol like that in FIG.

At this time, since the turn ratio of the primary current (for example, the first track current) and the secondary current (for example, the second track current), which are characteristics of the transformer, correspond one to one, two tracks have the same sign as in Fig. 6 on the 200 sets hang a load of 1 / 2V _lOAD size.

As a result, in the first track 100, the load on the first track 100 corresponding to the voltage source V _LOAD on the first track 100 and the transformer 310 as shown in FIGS. 6 and 7. (1 / 2V _LOAD ) cancels, resulting in a load of size 1 / 2V _LOAD in phase with the voltage source (V _LOAD ).

In addition, the second track 200 also has the same reference numeral as in FIG. 6 in the direction of disturbing the current (I _{first track} ) flow on the second track 200 as shown in FIGS. 6 and 7. A phase load (1 / 2V _LOAD ) is formed.

As such, as shown in FIG. 9, the transformer 310 undergoes a balancing process of forming a load having the same size in the first and second tracks 100 and 200, as shown in FIGS. 6 and 7. The same current may flow on the first track 100 and the second track 200.

Through this, when both the first power supply module 110 or the second power supply module 210 operates normally, for example, any one of the first and second power supply modules 110 and 210 may be the first or second power supply module. Even when the power amount exceeding the maximum amount of power (10 kW) that can be supplied to the tracks 100 and 200 is consumed by the movement of the bogie in one of the first and second tracks 100 and 200, All of the trucks on the first and second tracks 100 and 200 may operate normally within a range in which the total power consumption amount does not exceed the total amount of power output from the first and second power supply terminals 110 and 210 (for example, 20 kW).

On the other hand, the track connection switch 320 is the first track 100 and the second power supply module corresponding to the first power supply module 110 and the transformer 310 as shown in [Fig. 4] and [Fig. 5]. Switching on and off the parallel connection between the corresponding second track 200 between 210 and transformer 310.

As a result, the track connection switch 320 controls the power supply from the second power supply module 210 to the first track 100 and from the first power supply module 110 to the second track 200. Can control the power supply.

On the other hand, the present invention is a first switch 120, the second switch 220, the first inductor 130, the first capacitor 140, the second inductor (FIG. 4 and 5) 230, the second capacitor 240, the first track resonance capacitor 150, and the second track resonance capacitor 250 may be configured.

The first switch 120 is mounted on the first track 100 corresponding to the space between the first power supply module 110 and the track connection switch 320 as shown in FIG. 5 and the first power supply module 110. Switching on and off the power supplied to the first track 100 or the second track 200 from.

The second switch 220 is mounted on the second track 200 corresponding between the second power supply module 210 and the track connection switch 320 as shown in FIG. 5 and the second power supply module 210. Switching on and off the power supplied to the first track 100 or the second track 200 from.

The first inductor 130 has a first track corresponding to the transformer 310 and the branch node of the first track 100 to which the track connection switch 320 is connected, as shown in FIGS. 4 and 5. 100).

As shown in FIGS. 4 and 5, the first capacitor 140 is connected in parallel to the first track 100 corresponding between the first inductor 130 and the transformer 310. 130 to form a first resonator.

As shown in FIGS. 4 and 5, the second inductor 230 corresponds to a second track corresponding to a branch node of the second track 200 to which the track connection switch 320 is connected and the transformer 310. 200).

As shown in FIGS. 4 and 5, the second capacitor 240 is connected in parallel to the second track 200 corresponding between the second inductor 230 and the transformer 310. 230 to form a second resonator.

The first track resonant capacitor 150 is mounted on the first track 100 corresponding between the first inductor 130 and the transformer 310 and is parallel to the first inductor 130 and the first capacitor 140. As it is connected to may form a resonator resonating with the inductance on the first track (100).

Here, the inductance on the first track 100 refers to an inductance component generated in the first track 100 itself when electricity is supplied to the first track 100 installed in the field.

The second track resonant capacitor 250 is mounted on the second track 200 corresponding between the second inductor 230 and the transformer 310 and is parallel to the second inductor 230 and the second capacitor 240. As it is connected to may form a resonator that resonates with the inductance on the second track 200.

Here, the inductance on the second track 200 refers to an inductance component generated in the second track 200 itself when electricity is supplied to the second track 200 installed at the site.

FIG. 8 is an exemplary view showing different power supplies supplied to first and second tracks through the transformer of the present invention in response to different loads applied to the first and second tracks of FIG. 5. ] Corresponds to different loads applied to the first and second tracks of FIG. 8 in spite of different supply power supplied from the first and second power supply modules to the first and second tracks through the transformer of the present invention. It is an exemplary figure which shows the state which equally balanced the current of 1, 2 track.

Referring to FIG. 8, due to load imbalance of the first and second tracks 100 and 200, power of '15 kW 'is required for the first track 100 and power of' 5 kW 'is required for the second track 200. In this case, due to the operation of the transformer 310, the first track 100 is supplied from the power of '10 kW 'supplied from the first power supply module 110 and the power of '10 kW' supplied from the second power supply module 210. Power of '15 kW 'may be supplied and power of' 5 kW 'may be supplied to the second track 200.

Referring to FIG. 9, due to load imbalance (eg, 200V and 14V) of the first and second tracks 100 and 200, power of '15 kW 'is required in the first track 100 and the second track 200 When power of '0.1 kW' is required, the power of '10 kW 'supplied from the first power supply module 110 and the power of '10 kW' supplied from the second power supply module 210 due to the operation of the transformer 310. From the first track 100 may be supplied with '15kW' power and the second track 200 may be supplied with '0.1kW' power.

At this time, due to the current balancing operation of the transformer 310, the current (I _{first track} ) flowing in the first track 110 and the current (I _{second track} ) flowing in the second track 200 are, for example, in [FIG. 9]. Likewise controlled to '75A'.

That is, the bogie moving along the first track 100 or the second track 200 only when the currents (I _{first track} , I _{second track} ) flowing in the first track 100 and the second track 200 are the same. Can move while generating an output voltage proportional to the track current.

Here, due to the current balancing operation of the transformer 310, the current flowing in the first track 110 (I _{first track} ) and the second track 200 regardless of the load difference between the first and second tracks 100 and 200. As the current I _{second track} is the same, the first power supply module 110 and the second power supply module 210 have the same average power as shown in FIG. 9 (eg, I _INV1 = I _INV2 = 40A). This can increase the reliability of the product.

FIG. 10 is an exemplary diagram illustrating a process in which power is supplied from the second power supply module to the first and second tracks as the operation of the first power supply module is stopped in FIG. 8.

Referring to FIG. 10, when the operation of the first power supply module 110 is stopped, power is supplied from the second power supply module 210 to the first and second tracks 100 and 200.

In this case, as shown in FIG. 10, the second switch 220 maintains the turn-on state, the first switch 120 is turned off, and is always turned off during the normal operation of the first and second power supply modules 110 and 210. The track connection switch 320 which was maintained is turned on.

As a result, according to the current balancing operation of the transformer 310, relative to the first track 100 with more load (eg 8 kW) than the second track 200 with a relatively low load (eg 2 kW). Supplies more power (eg 8 kW).

In this case, the transformer 310 balances the current (I _{first track} ) flowing in the first track 100 and the current (I _{second track} ) flowing in the second track 200 to be the same.

On the other hand, the current (I _{first track} ) flowing to the first track 100 is the track connection switch from the second power supply module 210 in addition to the current induced in the first track 100 in accordance with the balancing operation of the transformer 310 Since it is formed by the supply of current via 320, the size and performance of the transformer 310 may be lowered by that amount.

10: Track 1
11: power supply module 1
12: switch 1
20: Track 2
21: power supply module 2
22: switch 2
30: parallel connection switch
100: first track
110: first power supply module
120: first switch
130: first inductor
140: first capacitor
150: first track resonance capacitor
200: second track
210: second power supply module
220: second switch
230: second inductor
240: second capacitor
250: second track resonance capacitor
310: transformer
320: track connection switch

Claims (4)

A fault-ride-through type wireless power transmission apparatus using a transformer that equally balances current flowing in each of a plurality of tracks in response to different loads applied to a plurality of tracks.
A first power supply module connected to one track (hereinafter, referred to as a “first track”) of the plurality of tracks for moving the bogie to supply power to the first track in response to a load applied to the first track ( 110);
A second power supply module connected to another track adjacent to the first track (hereinafter referred to as a 'second track') and supplying power to the second track in response to a load applied to the second track; 210);
A current provided to the first track from the first power supply module and the second power supply module, the first power supply module and the second power supply disposed at an input end of the first track and an input end of the second track; A transformer (310) for balancing the currents supplied from the supply module to the second track to be equal to each other;
Switching on and off a parallel connection between the first track corresponding between the first power supply module and the transformer and the second track corresponding between the second power supply module and the transformer. A track connection switch (320) for controlling the power supply from the second power supply module for controlling the power supply from the first power supply module for the second track;
The fault-ride-through type wireless power transmission apparatus using a balancing transformer configured to include a.
The method according to claim 1,
A switch mounted on the first track corresponding between the first power supply module and the track connection switch to switch on / off control of power supplied from the first power supply module to the first track or the second track; 1 switch 120;
A switch mounted on the second track corresponding to the second power supply module and the track connection switch to control switching on / off power supplied from the second power supply module to the first track or the second track. 2 switch 220;
The fault-ride-through wireless power transmission apparatus using a balancing transformer, characterized in that the configuration further comprises.
The method according to claim 2,
A first inductor (130) mounted on the first track corresponding between the branch node of the first track to which the track connection switch is connected and the transformer;
A first capacitor 140 resonating with the first inductor as connected in parallel to the first track corresponding between the first inductor and the transformer;
A second inductor (230) mounted on the second track corresponding between the branch node of the second track to which the track connection switch is connected and the transformer;
A second capacitor (240) resonating with the second inductor as connected in parallel to the second track corresponding between the second inductor and the transformer;
The fault-ride-through wireless power transmission apparatus using a balancing transformer, characterized in that the configuration further comprises.
The method according to claim 3,
A first track resonance capacitor 150 mounted in the first track corresponding between the first inductor and the transformer and resonating with the inductance of the first track as connected in parallel with the first inductor and the first capacitor );
A second track resonance capacitor 250 mounted on the second track corresponding to the second inductor and the transformer and resonating with the inductance of the second track as connected in parallel with the second inductor and the second capacitor; );
The fault-ride-through wireless power transmission apparatus using a balancing transformer, characterized in that the configuration further comprises.

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