KR20190134442A - wireless power transfer device of fault-ride-through type using excitation potential of balancing transformer - Google Patents

Abstract

The present invention relates to a wireless power transmission technology of a fault-ride-through type, which equally balances 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. Even if the loads on the individual tracks are different from each other, when the power from each power supply module is provided to each track, a transformer mounted at an input end of the individual tracks equally balances the current flowing in each track. As the transformer for balancing the current for each track is mounted on a plurality of track input ends, it is not necessary to provide a separate control device for current control of each track.

Description

Wireless power transfer device of fault-ride-through type using excitation potential of 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 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 excitation power of 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. The present invention provides a fault-ride-through type wireless power transmission apparatus using excitation power of a balancing transformer capable of supplying the amount of power required by the track from the total amount of power output from the module.

In order to achieve the above object, the present invention provides a fault-ride-through type wireless power using an excitation power of a transformer that equally balances a current flowing through each of a plurality of tracks in response to different loads on a plurality of tracks. A transmission device, comprising: a first power supply connected to one of a plurality of tracks for moving a bogie (hereinafter referred to as a 'first track') to supply power to a first track in response to a load on the first track module; 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. It is configured to include; a transformer for balancing such that the current supplied to each other.

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

In addition, a first inductor mounted on a first track corresponding between the first power supply module and the first switch; A first capacitor resonating with the first inductor as connected in parallel to a first track corresponding between the first switch and the transformer; A second inductor mounted on a second track corresponding between the second power supply module and the second switch; 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.

Meanwhile, a third capacitor mounted on a first track corresponding between the first switch and the transformer, the third capacitor resonating with the inductance of the first track as connected in parallel with the first inductor and the first capacitor; And a fourth capacitor mounted on a second track corresponding between the second switch and the transformer and resonating with the inductance of the second track as connected in parallel with the second inductor and the second capacitor. .

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, 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.

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 an exemplary view showing a fault-ride-through type wireless power transmission apparatus using excitation power of a balancing transformer according to the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4;
6 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;
7 is an exemplary view illustrating a state in which power is supplied from first and second power supply modules to first and second tracks in response to a load generated in the first track in FIG. 4;
FIG. 8 illustrates the first, second, and second power supplies 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. An example diagram showing a state in which the currents of two tracks are equally balanced.
FIG. 9 is an exemplary view illustrating a process in which power is supplied from the first power supply module to the first and second tracks as the operation of the second power supply module is stopped in FIG. 7.
FIG. 10 is an exemplary view illustrating a state in which resonance occurs in each of the first and second tracks based on the power supplied from the first power supply module to the first and second tracks in FIG. 9.
FIG. 11 shows the first and second tracks despite different supply power supplied from the first power supply module 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. An illustration showing a state in which the currents are equally balanced.

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.

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

4 is an exemplary diagram showing a fault-ride-through type wireless power transmission apparatus using excitation power of a balancing transformer according to the present invention, and FIG. 5 is an enlarged view of a portion of FIG. 6 is an exemplary diagram 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 provides a fault-ride using an excitation power of a transformer that equally balances a current flowing through each of a plurality of tracks in response to different loads on a plurality of tracks. The through-type wireless power transmission device may include a first power supply module 110, a second power supply module 210, and a transformer 310.

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, for convenience of description of each configuration of the present invention, the first track 100 in the present specification is connected to the first power supply module 110 as shown in FIG. ), A closed loop to which the first inductor 130, the first capacitor 140, the first track resonance capacitor 150, and the transformer 310 are connected.

In addition, in the present specification, the 'second track 200' is connected to the second power supply module 210 as shown in FIG. 4 and the second switch 220, the second inductor 230, and the second capacitor. A closed loop 240 is connected to the second track resonance capacitor 250 and the transformer 310.

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. 5, 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. 5. ] 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 [FIG. 5].

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 to one-to-one, the transformer 310 may be configured to correspond to itself. two tracks have the same sign as in Fig. 5] to the substrate 200 and place walking the load on the 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 [FIG. 5] and [FIG. 6]. (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. 5 in the direction of disturbing the current (I _{first track} ) flow on the second track 200 as shown in FIGS. 5 and 6. A phase load (1 / 2V _LOAD ) is formed.

As such, as shown in FIG. 8, 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. 5 and 6. 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 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, a second capacitor 240, a third capacitor 150, and a fourth capacitor 250 may be included.

The first switch 120 is mounted on the first track 100 corresponding to the space between the first power supply module 110 and the transformer 310 as shown in FIG. 4 from the first power supply module 110. The power supplied to the first track 100 or the second track 200 is controlled to be switched on and off.

The second switch 220 is mounted on the second track 200 corresponding between the second power supply module 210 and the transformer 310 as shown in FIG. 4 from the second power supply module 210. The power supplied to the first track 100 or the second track 200 is controlled to be switched on and off.

The first inductor 130 is mounted on the first track 100 corresponding between the first power supply module 110 and the first switch 120 as shown in FIG.

The first capacitor 140 is formed together with the first inductor 130 as it is connected in parallel to the first track 100 corresponding between the first switch 120 and the transformer 310 as shown in FIG. 1 resonates on track 100.

The second inductor 230 is mounted on the second track 200 corresponding between the second power supply module 210 and the second switch 220 as shown in FIG. 4.

The second capacitor 240 is formed together with the second inductor 230 as the second capacitor 240 is connected in parallel to the second track 200 corresponding between the second inductor 230 and the transformer 310 as shown in FIG. 2 resonates on the track 200.

The third capacitor 150 is mounted on the first track 100 corresponding between the first switch 120 and the transformer 310 as shown in FIG. 4, but the first inductor 130 and the first capacitor ( 140 is connected in parallel to resonate with the inductance of the first track 100.

Here, the inductance of 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 fourth capacitor 250 is mounted on the second track 200 corresponding between the second switch 220 and the transformer 310 as shown in FIG. 4, but the second inductor 230 and the second capacitor ( As connected in parallel with 240, it resonates with the inductance of the second track 200.

Here, the inductance of 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 in the field.

FIG. 7 is an exemplary view illustrating a state in which power is supplied from the first and second power supply modules to the first and second tracks in response to the load generated in the first track in FIG. 4. In response to the different loads applied to the first and second tracks, the currents of the first and second tracks are supplied despite 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. It is an exemplary figure which shows the same balanced state.

Referring to FIG. 7, power of '15 kW 'is required for the first track 100 and power of' 5 kW 'is required for the second track 200 due to load imbalance of the first and second tracks 100 and 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. 8, due to load imbalance (eg, 200 V and 14 V) 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 may be used. 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. 8. 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. 8 (eg, I _INV1 = I _INV2 = 40A). This can increase the reliability of the product.

FIG. 9 is an exemplary view illustrating a process in which power is supplied from the first power supply module to the first and second tracks as the operation of the second power supply module is stopped in FIG. 7, and FIG. 9 is an exemplary view showing a state in which resonance occurs in each of the first and second tracks based on the power supplied from the first power supply module to the first and second tracks, and FIG. Example showing a state in which the currents of the first and second tracks are equally balanced despite the different supply power supplied from the first power supply module to the first and second tracks through the transformer of the present invention in response to different loads to be applied. It is also.

Referring to FIG. 9, when the operation of the second power supply module 210 is stopped, power is supplied from the first power supply module 110 to the first and second tracks 100 and 200.

In this case, as shown in FIG. 9, the first switch 120 remains turned on and the second switch 220 is turned off.

As a result, according to the current balancing operation of the transformer 310, relative to the first track 100 with more load (eg, 7 kW) than the second track 200 with a relatively low load (eg, 3 kW). Supply more power (eg 7kW).

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.

Here, the current I _{second track} flowing to the second track 200 is transferred from the current I _{first track} flowing in the first track 100 to the second track 200 according to the balancing operation of the transformer 310. Indicates the current to be induced.

In this way, the current flowing through the first track (100) according to a current balancing operation of the transformer (310), (I _{first track),} the second track 200 in the current of the same size from (I _{a second track)} is when the organic [ As shown in FIG. 10, resonance occurs in each of the first track 100 and the second track 200.

As a result, the trolley for moving the first track 100 and the trolley for moving the second track 200 may operate normally along each track. In this case, since each of the trucks moving through the first and second tracks 100 and 200 may be configured to operate by being supplied with the same amount of power, the current flowing in the first track 100 and the second track 200 is always the same. You need to keep the size.

Meanwhile, referring to FIG. 11, when the operation of the second power supply module 210 is stopped, due to load imbalance (eg, 200V and 14V) of the first and second tracks 100 and 200, the first track 100 may be damaged. The first track from the power supplied from the first power supply module 110 through the current balancing operation of the transformer 310 when the power of '15kW' and the second track 200 requires '0.1kW' Power of '15 kW 'may be supplied to the 100, and power of' 0.1 kW 'may be supplied to the second track 200.

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, shown in FIG. 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.

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: third capacitor
200: second track
210: second power supply module
220: second switch
230: second inductor
240: second capacitor
250: fourth capacitor
310: transformer

Claims (4)

A fault-ride-through type wireless power transmission apparatus using excitation power of a transformer that equally balances current flowing through 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;
Fault-ride through type wireless power transmission apparatus using excitation power of a balancing transformer configured to include.
The method according to claim 1,
A first switch mounted on the first track corresponding between the first power supply module and the transformer to switch on / off control of power supplied from the first power supply module to the first track or the second track 120;
A second switch mounted on the second track corresponding to the second power supply module and the transformer to switch on / off control of power supplied from the second power supply module to the first track or the second track; 220;
A fault-ride-through type wireless power transmission apparatus using excitation power of a balancing transformer, characterized in that the configuration comprising a.
The method according to claim 2,
A first inductor (130) mounted on the first track corresponding between the first power supply module and the first switch;
A first capacitor 140 resonating with the first inductor as connected in parallel to the first track corresponding between the first switch and the transformer;
A second inductor 230 mounted on the second track corresponding between the second power supply module and the second switch;
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;
A fault-ride-through type wireless power transmission apparatus using excitation power of a balancing transformer, characterized in that the configuration further comprises.
The method according to claim 3,
A third capacitor 150 mounted on the first track corresponding between the first switch 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 fourth capacitor 250 mounted on the second track corresponding between the second switch and the transformer and resonating with the inductance of the second track as connected in parallel to the second inductor and the second capacitor ;
A fault-ride-through type wireless power transmission apparatus using excitation power of a balancing transformer, characterized in that the configuration further comprises.

Images