KR102132749B1 - wireless power transfer device of fault-ride-through type using balancing transformer - Google Patents

Abstract

The present invention is a fault-ride-through type that balances the current flowing in each track in the same manner even when loads generated in each track 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. As a wireless power transmission technology, even when loads applied to individual tracks are different from each other, when power from each power supply module is provided to each track, a transformer mounted at the input terminal of each track balances the current flowing through each track equally. to be. According to the present invention, when one of the power supply module operations is stopped due to the provision of the track connection switch, the track connection switch other than the current induced by the balancing operation of the transformer in a situation in which power is supplied to all the tracks through the remaining power supply modules Since it is also possible to supply a current through the, it has the advantage of adopting a transformer having a low performance or a small standard.

Description

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

The present invention is a fault-ride-through type that balances the current flowing in each track in the same manner even when loads generated in each track 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. It is a wireless power transmission technology.

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

In particular, when one of the plurality of power supply modules stops working, it is possible to effectively balance the current flowing through the plurality of tracks even by adopting a low-spec balancing transformer in supplying power to each track with 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 cart moves is installed according to the standard of the space to be installed, and a plurality of power supply modules (eg, inverters) respectively in charge of the plurality of tracks may be provided.

For example, [FIG. 1] is an exemplary view showing a general fail-over type wireless power transmission device, and [FIG. 2] is an exemplary view showing a state in which the power supply module 1 has stopped operating in [FIG. 1], [ 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.

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

Here, when each of the power supply modules 1, 2 (11, 21) operates normally, the switches 1, 2 (12, 22) are configured to maintain a turn-on state and the parallel connection switch 30 is to maintain a turn-off state. do.

At this time, as shown in [Fig. 2], when one power supply module 1 (11) stops due to a failure, switch 1 (12) is turned off and switch 2 (22) remains turned on and the parallel connection switch (30) is As it is turned on, the first and second tracks 10 and 20 are configured in a so-called'fail-over' type that receives power 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 There is a disadvantage that the maximum amount of power that can be supplied from (11) (eg, 10 kW) cannot be exceeded.

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

The present invention has been proposed in view of the above, the object of the present invention is the same amount for each track even when the load generated on each track is different in a wireless power transmission device equipped with a plurality of power supply modules and a plurality of tracks. It is to provide a fault-ride-through type wireless power transmission device using a balancing transformer that allows the current of the current to flow.

In addition, the object of the present invention is a plurality of power supply modules and a plurality of power supply even when the number of trucks that can be in charge of one power supply module in a wireless power transmission device equipped with a plurality of tracks operates on one track. It is to provide a fault-ride-through type wireless power transmission device using 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 addition, it is an object of the present invention to provide a fault-ride-through type wireless power transmission device using a balancing transformer capable of effectively balancing current flowing through a plurality of tracks even through a low-spec balancing transformer.

In order to achieve the above object, the present invention is a fault-ride-through type wireless power transmission device using 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 a plurality of tracks for moving a bogie 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; It is arranged at the input terminal of the first track and the input terminal of the second track, and the current supplied from the first power supply module and the second power supply module to the first track, and the first power supply module and the second power supply module to the second track. A transformer to balance the supplied currents to each other; From the second power supply module for the first track by switching on/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. It can be configured to include; a track connection switch for controlling the power supply of the control and for controlling the power supply from the first power supply module for the second track.

In addition, a first switch mounted on a first track corresponding to the first power supply module and the track connection switch to switch on/off the power supplied from the first power supply module to the first track or the second track; Further comprising a second switch mounted on a second track corresponding to the second power supply module and the track connection switch for switching on/off the power supplied to the first track or the second track from the second power supply module; Can be configured.

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

In the present invention, the same amount of current is applied to each track even when the load generated in each track is different as the transformers are installed at the input terminals of each track adjacent to each other in a wireless power transmission device having a plurality of power supply modules and a plurality of tracks. It shows the advantage of allowing each track to operate the bogie by allowing it to flow.

In addition, according to the present invention, as the transformers are installed at the input terminals of each track adjacent to each other in a wireless power transmission device provided with a plurality of power supply modules and a plurality of tracks, one or more of the number of carts that can be handled by one power supply module is one Even when operating on the track of, it represents an advantage of supplying the amount of power required by the track from the total amount of power output from the plurality of power supply modules.

In addition, because of the current balancing operation of the transformer, regardless of each load difference appearing in a plurality of tracks, all of the plurality of power supply modules can supply the same average power, thus exhibiting an advantage of improving product reliability.

In addition, the present invention also shows the advantage of not having to provide separate control equipment for controlling the current of each track by mounting transformers for current balancing of each track at a plurality of track input terminals.

In addition, the present invention provides a track connection switch in addition to the current induced by the balancing operation of the transformer in a situation in which power is supplied to all the tracks through the remaining power supply modules when the operation of any one power supply module is stopped due to the provision of the track connection switch. Since it is also possible to supply a current through the, it shows the advantage of adopting a transformer having a low performance or a small standard.

1 is an exemplary view showing a general fail-over type wireless power transmission device,
[Figure 2] is an exemplary view showing a state in which the power supply module 1 has stopped operating in [Figure 1],
[Figure 3] is an exemplary view showing that power supply corresponding to the excess load is impossible when a load exceeding the capacity of the power supply module 1 is applied to the first track in [Figure 1];
4 is a load-exceeding load exceeding the capacity of the first power supply module in the fault-ride-through type wireless power transmission apparatus using the balancing transformer according to the present invention. Illustrative diagram showing the possibility of power supply,
5 is an exemplary view showing a fault-ride-through type wireless power transmission device using a balancing transformer according to the present invention;
FIG. 6 is an enlarged view excerpting a part of [FIG. 5 ];
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,
8 is an exemplary view showing different supply powers supplied 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. 5];
[FIG. 9] corresponds to different loads applied to the first and second tracks of [FIG. 8], and also to different supply powers supplied from the first and second power supply modules to the first and second tracks through the transformer of the present invention In spite of this, an example showing a state in which the currents of the first and second tracks are equally balanced,
10 is an exemplary view showing 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 in FIG. 8 is stopped.

In this specification, the'balancing transformer' is disposed in each input terminal of each track (for example, the first track and the second track) that are adjacent to each other, and the current flowing in the first track 100 and the second track 200. This indicates that the current is balanced to maintain the same state with each other.

That is, the'balancing transformer' excites the current to the second track 200 through the current flowing in the first track 100 between the first track 100 and the second track 200 adjacent to each other, and simultaneously As the current flowing through the first track 100 is excited through the current flowing through the two tracks 200, the current flowing through the first track 100 and the current flowing through 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 When the operation of the device is stopped, the specification of the'balancing transformer' is excluded by relying only on the'balancing transformer' in supplying power from the first power supply module 110 to the second track 200, and the'balancing transformer' is used. It is necessary to provide a separate track connection switch that interfaces current to flow 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, power is supplied from the first power supply module 110 excluding the second power supply module 210 to the first track 100 and the second track 200 even through a low-spec'balancing transformer'. Therefore, 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 with reference to the drawings below.

4 is a load-exceeding load exceeding the capacity of the first power supply module in the fault-ride-through type wireless power transmission apparatus using the balancing transformer according to the present invention. It is an exemplary view showing that power supply is also possible, and [FIG. 5] is an exemplary view showing a fault-ride-through type wireless power transmission apparatus using a balancing transformer according to the present invention, and [FIG. 6] is [FIG. 5] 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 is a fault-ride-through type using 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. As a wireless power transmission device, it may be configured to include a first power supply module 110, a second power supply module 210, a transformer 310, a track connection switch 320.

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

In addition, each capacitor and inductor of the part 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 electric pattern of the control unit. Can.

At this time, the conductor or electric pattern of the control unit is separated from the'first and second tracks 100 and 200' that wirelessly supply power to the truck.

However, for convenience of description of each component of the present invention, the'first track 100' in this specification is connected to the first power supply module 110 as shown in [FIG. 4] and [FIG. 5]. A closed loop to which the first switch 120, the first inductor 130, the first capacitor 140, the first track resonant capacitor 150, the transformer 310, and the track connection switch 320 are connected.

And, in the present specification, the'second track 200' is connected to the second power supply module 210 as shown in [FIG. 4] and [FIG. 5], the second switch 220, the second inductor 230 ), the second capacitor 240, the second track resonant 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 a plurality of tracks for moving the cart (not shown) as shown in [FIG. 4] and [FIG. 5], and the first track 100 Power is supplied to the first track 100 in response to a load applied to the load.

The second power supply module 210 is connected to the other second track 200 adjacent to the first track 100 as shown in [FIG. 4] and [FIG. 5], and catches the second track 200. Electric power is supplied to the second track 200 in response to the load.

Here, when the current flowing through the first track 100 and the second track 200 must be the same, the bogie moving along the first track 100 or the second track 200 generates an output voltage proportional to the track current. Can move.

To this end, the transformer 310 is supplied from the first power supply module 110 and the second power supply module 210 and flows in the first track 100 (I _{first track} ) and the first power supply module ( 110) and the first track 100 as shown in [Fig. 4] and [Fig. 5] so that the current (I _{second track} ) flowing from the second power supply module 210 and flowing in the second track 200 is the same. ) And the input terminal 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 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 a bogie is located on the first track 100, the voltage source V _LOAD of the phase that hinders the current (I _{first track} ) flow on _{the first track} 100 is shown in FIG. ], it can be modeled as occurring on the first track 100.

Here, the transformer 310 corresponds to a load of 1/2V _LOAD size 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 change. On the first track 100, it is hung so as to have the same sign as in [Fig. 6].

At this time, since the conversion ratio of the primary side current (eg, the first track current) and the secondary side current (eg, the second track current), which are characteristics of the transformer, correspond one-to-one, the transformer 310 is configured to counteract itself. 2 On the track 200, a load of 1/2V _LOAD size is hung to have the same sign as in [Fig. 6].

As a result, in the first track 100, the voltage source V _LOAD on the first track 100 and the load on the first track 100 corresponding to the transformer 310 as shown in [FIG. 6] and [FIG. 7]. (1/2V _LOAD ) cancels out, and eventually a load with a size of 1/2V _LOAD is formed in the same phase as the voltage source (V _LOAD ).

Also, in the second track 200, as shown in [FIG. 6] and [FIG. 7], the same sign as in [FIG. 6] is shown in the direction of interfering with the current (I _{first track} ) flow on the second track 200. The phase load (1/2V _LOAD ) of the excitation phase is formed.

As such, as shown in [Fig. 9] through the balancing process to form the same size load on the first and second tracks 100, 200 as shown in [Fig. 6] and [Fig. 7] through the transformer 310. The same current can 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 is normally operated, for example, any one of the first and second power supply modules 110 and 210 is powered by the first and second power supply modules. Even if the amount of power exceeding the maximum amount of power (10 kW) that can be supplied to the tracks 100, 200 is consumed by bogie movement on any one track of the first and second tracks 100, 200, the amount of electric power on the first and second tracks 100, 200 When the total amount of power consumed by the first and second power supply terminals 110 and 210 does not exceed the total amount of power (eg, 20 kW), all the vehicles on the first and second tracks 100 and 200 may operate normally.

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

As a result, the track connection switch 320 controls the power supply from the second power supply module 210 for the first track 100 and from the first power supply module 110 for the second track 200. Power supply can be controlled.

On the other hand, according to the present invention, referring to FIGS. 4 and 5, the first switch 120, the second switch 220, the first inductor 130, the first capacitor 140, and the second inductor ( 230), a second capacitor 240, a first track resonance capacitor 150, and a second track resonance capacitor 250.

The first switch 120 is mounted on the first track 100 corresponding to the first power supply module 110 and the track connection switch 320, as shown in [Fig. 5], the first power supply module 110 ) To switch on/off the power supplied to the first track 100 or the second track 200.

The second switch 220 is mounted on the second track 200 corresponding to the second power supply module 210 and the track connection switch 320, as shown in Figure 5, the second power supply module 210 ) To switch on/off the power supplied to the first track 100 or the second track 200.

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

The first capacitor 140 is connected in parallel to the first track 100 corresponding to the first inductor 130 and the transformer 310 as shown in [FIG. 4] and [FIG. 5]. 130) to form a first resonator that resonates.

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

The second capacitor 240 is connected in parallel to the second track 200 corresponding to the second track 200 between the second inductor 230 and the transformer 310 as shown in [FIG. 4] and [FIG. 5] ( 230) to form a second resonator that resonates.

The first track resonant capacitor 150 is mounted on the first track 100 corresponding between the first inductor 130 and the transformer 310, but is parallel to the first inductor 130 and the first capacitor 140. As it is connected to, a resonator that resonates with the inductance on the first track 100 may be formed.

Here, the inductance on the first track 100 refers to an inductance component generated in the first track 100 itself when electricity is passed through 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, but is parallel to the second inductor 230 and the second capacitor 240. As it is connected to, a resonator unit resonating with the inductance on the second track 200 may be formed.

Here, the inductance on the second track 200 refers to an inductance component generated in the second track 200 itself when electricity is passed through the second track 200 installed in the field.

8 is an exemplary view showing different supply powers supplied 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. 5], and [FIG. 9] 8] corresponds to different loads applied to the first and second tracks of FIG. 8, 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 example showing the state in which the currents of the 1,2 tracks are equally balanced.

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

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

At this time, the current flowing through the first track 100 (I _{first track} ) and the current flowing through the second track 200 (I _{second track} ) due to the current balancing operation of the transformer 310 are, for example, in [FIG. 9]. The same is controlled with '75A'.

That is, the current flowing through the first track 100 and the second track 200 (I _{first track} , I _{second track} ) must be the same to move along the first track 100 or the second track 200 Can move while generating an output voltage proportional to the track current.

Here, the current flowing through the first track 100 (I _{first track} ) and the second track 200 regardless of the load difference between the first and second tracks 100 and 200 due to the current balancing operation of the transformer 310 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 in [FIG. 9] (eg, I _INV1 =I _INV2 =40A) Since it can supply, it can increase the reliability of the product.

FIG. 10 is an exemplary view showing 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 in FIG. 8 is stopped.

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

At this time, as shown in FIG. 10, the second switch 220 remains turned on, the first switch 120 is turned off, and the first and second power supply modules 110 and 210 are always turned off during normal operation. The track connection switch 320 that was holding is turned on.

As a result, according to the current balancing operation of the transformer 310, it is relative to the first track 100, which has a relatively large load (eg, 8 kW) than the second track 200, which has a relatively small load (eg, 2 kW). Supply more power (eg 8 kW).

In this case, the transformer 310 also balances so that the current flowing through the first track 100 (I _{first track} ) and the current flowing through the second track 200 (I _{second track} ) are the same.

On the other hand, the current flowing through the first track 100 (I _{first track} ) is a track connection switch from the second power supply module 210 in addition to the current induced in the first track 100 according to the balancing operation of the transformer 310 Since it is formed due to the supply of electric current through 320, the size or performance of the transformer 310 may be low.

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 device using 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'first track') of a 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') to supply power to the second track in response to a load applied to the second track ( 210);
During normal operation of the first power supply module 110 and the second power supply module 210, any one of the first power supply module 110 and the second power supply module 210 is supplied with a power supply module. The amount of power consumed by the target track is consumed by the first power supply even when the amount of power exceeding the amount of power available to be supplied is consumed by one of the first track and the second track (hereinafter referred to as a'target track'). Within the total amount of power output from the module 110 and the second power supply module 210, the input terminal of the first track and the second track of the first track and the second track are allowed to operate normally. The current supplied to the first track from the first power supply module and the second power supply module and the current supplied to the second track from the first power supply module and the second power supply module is disposed at the input terminal. Transformers balanced to be identical to each other;
By switching on/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, the first track is connected to the first track. A track connection switch 320 controlling power supply from the second power supply module to the power supply and controlling power supply from the first power supply module to the second track;
It is mounted on the first track corresponding to between the first power supply module and the track connection switch for switching on/off control of the power supplied to the first track or the second track from the first power supply module. 1 switch 120;
It is mounted on the second track corresponding to between the second power supply module and the track connection switch for switching on/off control of the power supplied to the first track or the second track from the second power supply module. 2 switch 220;
Fault-ride-through type wireless power transmission device using a balancing transformer configured to include.
delete The method according to claim 1,
A first inductor 130 mounted on the first track corresponding to a 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 to a 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;
Fault-ride-through type wireless power transmission device using a balancing transformer, characterized in that further comprises a.
The method according to claim 3,
A first track resonant capacitor 150 mounted on the first track corresponding to the first inductor and the transformer and resonating with the inductance of the first track as connected in parallel to the first inductor and the first capacitor 150 );
A second track resonant capacitor (250) mounted on the second track corresponding between the second inductor and the transformer and resonating with the inductance of the second track as connected in parallel to the second inductor and the second capacitor );
Fault-ride-through type wireless power transmission device using a balancing transformer, characterized in that further comprises a.

Images