KR20190009237A - Wireless power pickup apparatus having a plurality of electrically independent coils and method of controlling the same - Google Patents

Abstract

The present invention discloses a novel form of a power collection apparatus including independently controllable four coils. In addition, the present invention discloses a power supply apparatus including independently controllable four coils. Provided are power supply and power collection systems with increased remote wireless power transmission efficiency while satisfying the standard compatibility by the power supply apparatus and the power collection apparatus. The power supply apparatus is compatible with various kinds of conventional power collection systems. In addition, compatibility with a new power collection system to be developed in the future can be expanded by changing a feed flux pattern. The power collection system is compatible with various kinds of conventional power supply systems. Moreover, compatibility with a new power supply system to be developed in the future can be expanded. It has been confirmed that, if one wireless power supply system includes the power supply apparatus and the power collection apparatus, effects of each apparatus overlapped to make the system further resistant to deviation.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless power collecting apparatus having a plurality of electrically independent coils, and a control method thereof.

The present invention relates to a wireless power collecting apparatus having a plurality of coils and a control method thereof, and more particularly, to a wireless power collecting apparatus having four coils electrically separated and independently controllable, And more particularly, to a wireless power collecting apparatus control method for efficiently receiving a magnetic field of various patterns generated from an apparatus. The present invention also relates to a wireless charging system capable of more effectively transmitting electric power by changing the shape of a magnetic field through mode switching when positional deviation occurs using these power supply devices and current collectors.

The conventional power generation system based on the circular coil and the power supply system based on the power supply system have a problem in that the efficiency of the wireless power transmission is greatly reduced and charging is difficult when a variation occurs between the power supply system and the power collection system . In addition, the power supply system and the power collecting system of the conventional wireless power transmission system show little or no compatibility with other types of power supply system and power collecting system. Accordingly, there has been a problem in that, when another type of current collecting system receives electric power from a power supply system via radio, the capacity and efficiency of charging can not reach the required level in the standard.

As one of the measures for solving such a problem, recently, there has been proposed a power supply system that has two power supply coils capable of independently controlling the current and has a constant charging capacity and compatibility with each other in the existing standard space. However, It is judged that it has somewhat low compatibility performance with respect to the power supply system having the conventional circular coil at the correct position and deviation. The shape of the proposed feed coil and the current collecting coil are DD type in which two feeding coils are arranged side by side, DDQ type in which one circular coil is superimposed on two feeding coils arranged side by side, And a BP type in which they are partially overlapped with each other. For example, Adeel Zaheer et al., Investigation of Multiple Decoupled Coil Primary Pad Topologies in Lumped IPT Systems for Interoperable Electric Vehicle Charging, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol. 30, NO. 4, APRIL 2015. The power collecting apparatuses corresponding to the power feeding apparatus proposed in this document are provided with two power collecting coils arranged side by side (DD type power collecting coils).

Accordingly, there is a demand for a power supply system capable of satisfying the capacity and efficiency required by the standard, and capable of long-distance charging that the conventional power supply system having a circular coil does not have. Further, there is a demand for a power supply system capable of efficient wireless power transmission in correspondence with a newly proposed current collecting system such as DD type current collecting coil.

In addition, there is a need for a current collector capable of satisfactorily satisfying the capacity and efficiency required in the standard, and capable of effectively receiving power wirelessly even in the presence of a large deviation of a magnetic field formed by a power supply device having a conventional circular coil.

Adeel Zaheer et al., Investigation of Multiple Decoupled Coil Primary Pad Topologies in Lumped IPT Systems for Interoperable Electric Vehicle Charging, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol. 30, NO. 4, APRIL 2015

The present invention provides a wireless power feeding device and a wireless power collecting device with improved efficiency of wireless power transmission while satisfying standard compatibility and at the same time in the presence of a large deviation and a wireless power transmitting system in which such wireless power feeding device and wireless power collecting device are integrated .

In addition to compatibility with existing various types of wireless feeding devices, it is also possible to change the connection state between the current collecting coils or to control the phase of the current flowing in the current collecting coils, thereby expanding compatibility with other fields or a new wireless feeding device And an object of the present invention is to provide a wireless power collecting apparatus capable of such a wireless power collecting apparatus.

According to an aspect of the present invention, there is provided a method of controlling a wireless power collecting apparatus including four current collecting coils electrically isolated from each other, the method comprising: a) detecting a state of the four current collecting coils; (b) determining a position of the wire current collector based on information including a state of each of the current collecting coils detected in the step (a); (c) determining an operation mode of each of the current collecting coils based on information including the position of the current collector determined in the step (b); And (d) adjusting an operation of each of the current collecting coils based on an operation mode of each of the current collecting coils determined in the step (c).

According to another aspect of the present invention, there is provided a current collecting device for receiving power wirelessly, comprising: at least four current collecting coils disposed to partially overlap with other adjacent current collecting coils and electrically independent from each other; A current collector position determination unit for outputting information including a position of the current collector when information including a change in current generated in each of the at least four current collectors is provided as an input; A control unit for individually controlling operations of the four current collecting coils, comprising: (a) sensing a state of the four current collecting coils; (b) determining a position of the wire current collector based on information including a state of each of the current collecting coils detected in the step (a); (c) determining an operation mode of each of the current collecting coils based on information including the position of the current collector determined in the step (b); And (d) a step of adjusting the operation of each of the current-collecting coils based on the operating mode of each of the current-collecting coils determined in the step (c).

According to still another aspect of the present invention, there is provided a current collecting coil device for use in a current collecting device for receiving power wirelessly, comprising four current collecting coils each having a quadrangular shape and arranged so as to overlap with each other, Wherein each of the current collecting coils has an aspect ratio of between 1.0 and 1.25, and a ratio of overlapping one of the current collecting coils with another adjacent one of the power feeding coils is between 0.5 and 0.8. Is provided.

According to the present invention, not only is it compatible with existing various types of wireless feeding devices, but also by changing the connection state between the current collecting coils or controlling the phase of the current flowing in each of the current collecting coils, A current collecting device capable of expanding compatibility with the present invention is provided.

Also, according to the present invention, there is provided a wireless power feeding device improved in the remote wireless power transmission efficiency while satisfying the standard compatibility, and a wireless power collecting device improved in the remote wireless power transmission efficiency while satisfying the standard compatibility. Also, a wireless power transmission system in which a wireless power supply device and a wireless power collecting device according to the present invention are combined to maximize the effect is provided.

1 is a diagram showing an induced electromotive force according to a positional deviation of a standard power collector when a conventional standard power feeder is arranged long in the lateral direction.
2 is a diagram showing an induced electromotive force according to a positional deviation of a standard power collector when a conventional standard power feeder is arranged long in the longitudinal direction.
3 is a schematic diagram of a power feeding device according to an embodiment of the present invention.
Fig. 4 is a plan view and a front view of the power supply coil device of the power supply device shown in Fig. 3; Fig.
Fig. 5 schematically shows a resonant capacitor module of the feed device shown in Fig. 3; Fig.
Fig. 6 is a diagram showing an operation mode of the power supply coil device of the power supply device shown in Fig. 3. Each of the power supply coils of the illustrated power supply coil device is square.
Fig. 7 is a view showing an operation mode of the power supply coil apparatus of the power supply apparatus shown in Fig. 3. Each power supply coil of the illustrated power supply coil apparatus is rectangular.
FIG. 8 is a view showing a change in induced electromotive force according to the aspect ratio and degree of superimposition of the feed coil device in the feed coil device according to the present invention shown in FIG. 3; FIG.
9 is a view showing a current collector according to an embodiment of the present invention.
10 is a view showing a current-collecting coil device of the current-collecting device shown in Fig.
Fig. 11 is a view showing one current-collecting coil of the current-taking coil device shown in Fig. 10; Fig.
12 is a view for explaining an operation mode of the current-collecting coil shown in Fig. 10; Fig.
13A is a view for explaining the operation mode of the current collecting coil when the current collecting device according to the present invention is disposed at a position deviated in the y-direction from the center with respect to the standard power feeding device;
13B is a view for explaining an operation mode of the current collecting coil when the current collecting device according to the present invention is disposed at a position deviated from the center in the x-direction with respect to the standard power feeding device.
13C is a view for explaining an operation mode of the current collecting coil when the current collecting device according to the present invention is disposed at a position deviated diagonally from the center with respect to the standard power feeding device.
14 is a graph showing an electromotive force induced in the current collector when the current collector according to the present invention deviates from the center position of the standard power feeder.
15 is a flowchart for explaining a method for locating a current collector in a feeder according to the present invention;
FIG. 16 is a flowchart of the detailed steps of step S120 in FIG. 15; FIG.
17 is a flowchart for explaining a method for grasping the position of the power collecting apparatus according to the present invention.
18 is a graph showing a change in induced electromotive force according to a positional deviation of the current collector when the current-feeding device according to the present invention and the current-collecting device according to the present invention are used in combination.
19A is a diagram showing a change in operation mode of the power collector according to a positional deviation of the power feeding device according to the present invention when the current collecting device according to the present invention is in the all mode.
FIG. 19B is a diagram illustrating a change in the operating mode of the power collector according to the positional deviation of the power feeding device according to the present invention when the current collecting device according to the present invention is in the all mode. FIG.
19c is a diagram showing a change in the operation mode of the current collector according to the positional deviation of the power supply device according to the present invention when the operation mode of the current collector according to the present invention changes.
19D is a diagram showing a change in the operation mode of the current collector according to the positional deviation of the feeder according to the present invention when the operation mode of the current collector according to the present invention changes.
20 is a view showing a deviation according to a position of a standard power collecting system and a power collecting system according to the present invention;
Fig. 21 is a view for explaining the operation of the switch in each mode of the power supply coil when the shared capacitor module shown in Fig. 5 is used; Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. It is self-evident. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In order to clearly illustrate the present invention, parts not related to the description are omitted, and like reference numerals designate like elements throughout the specification.

Feeding device

Configuration of the feeding device

1, the power feeding device 1 is arranged long in the power feeding system according to the standard, and then the power collecting device 2 is moved in the x-direction and the y-direction with respect to the center of the power feeding device 1, 2 shows a result obtained by simulating the voltage applied to the power feeding device 1 in the power feeding system 1 according to the standard. And the voltage induced in the current collector 2 is calculated by simulating moving in the x-direction and the y-direction with respect to the center. In the table of FIG. 1 and FIG. 2, a period indicated by a red letter means that a counter electromotive force is generated in the current collector 2.

On the other hand, the standard for the parking area varies from country to country, but the width is between 2.0m and 2.6m and the length is between 5m and 6m. Generally, the width of the vehicle is about 1.6 m in the case of a compact car and about 1.8 m in the case of a quasi-submersible vehicle. Accordingly, when the battery of the vehicle is to be charged with the wireless power transmission, a deviation of about 0.1 m to 0.5 m may occur between the power supply device and the power collecting device.

Therefore, when a deviation occurs between the position of the power feeding device and the position of the power collecting device in the power feeding system according to the standard, the induced power is greatly reduced even if the deviation is small, and a back electromotive force occurs when the deviation is large .

FIG. 3 schematically shows a power feeding coil device 110 having four coils according to an embodiment of the present invention and a power feeding device 100 using the same. The power supply apparatus 100 includes a power supply coil unit 110 having four power supply coils 111, 112, 113 and 114, a resonant capacitor module 130, an inverter 140, and coils 111, 112, 113, 114, and 124 to the inverter 140 via the resonant capacitor module 130. The switches 140,

Fig. 4 shows an example of the feed coil device 110 shown in Fig. The same reference numerals denote the same elements, and reference numeral 15 denotes a power feeding core 115. [ Each of the four feeding coils 111, 112, 113, and 114 shown in FIG. 4 has a substantially quadrangular shape, and the inner areas formed by the coils are partially overlapped with each other. Further, each coil has a square shape having the same size. However, the form of the power supply coil is not necessarily limited to a square, and may be variously changed corresponding to a required magnetic flux pattern. In the embodiment shown in FIG. 4, the coils are superimposed in the same manner, but the superposition method corresponding to the desired magnetic flux pattern can be variously changed. Four feeding coils of the feeding coil unit 110 are connected to the feeding cores 115 of the third feeding coil 113, the second feeding coils 112, the first feeding coils 111 and the fourth feeding coils 114 Are stacked in this order. A shape retaining member (not shown) for retaining the shape of the power supply coil may be disposed in the space between the coils. It is clear that the arrangement of the feeding coils can be done in other ways.

Each of the power supply coils 111, 112, 113 and 114 is connected to the inverter 40 via switches 121, 122, 123 and 124. For example, each of the switches 121, 122, 123, and 124 may be configured to switch or cut off the direction of power supplied to each of the power feed coils 111, 112, 113, and 114. Accordingly, high-frequency power having the same or opposite phase can be provided to each of the coils 111, 112, 113, and 114 by the switching operation of the respective switches, and the supply of power may be interrupted. The power feeding coils 111, 112, 113, 114 and the inverter 140 are connected to each other through the resonance capacitor module 130.

5 schematically shows an example of the resonant capacitor module 130 and the electrical connection between the power feed coils 111, 112, 113 and 114 and the resonant capacitor module 130. As shown in FIG. In FIG. 5, the power feed coils 111, 112, 113 and 114 and the switches SW1, SW2, SW3 and SW4 are connected in a manner different from that shown in FIG. The switches SWA, SWB, and SWC in the resonant capacitor module 30 can be electrically controlled. Various operation modes of the power feeding device 100 according to the individual operation of each of the power feeding coils 111, 112, 113 and 114 will be described later in detail.

Operating mode of the feeding coil

6, when the most advantageous induced electromotive force is generated while changing the position of the standard power collecting device in the x-direction and the y-direction with respect to the center point of the feed coil device 110 according to an exemplary embodiment of the present invention, (111, 112, 113, 114). Specifically, the direction of the current supplied to each of the power supply coils is controlled so that there is no section in which the direction of the electromotive force induced in the standard current collector is reversed, or a section in which no induced electromotive force is generated.

In the table of FIG. 6, the four-digit number indicates the direction of the current applied to each power-feeding coil, and is sequentially displayed from the first power-feeding coil to the fourth power-feeding coil. That is, for example, (1 1 -1 -1) indicates that a clockwise current is applied to the first feeding coil 111 and the second feeding coil 112, and the third feeding coil 113 and the fourth feeding And the coil 114 is applied with a counterclockwise current.

There are three types of modes identified by simulation: Quarter mode, Half mode, All mode. In the quarter mode, the direction of the current flowing in any one of the four feeding coils is different and the currents flowing in the remaining three feeding coils are in the same direction. In the half mode, the feeding coils adjacent to each other in the transverse or longitudinal direction And the all mode is a case where a current in the same direction flows in all of the four feeding coils. In each mode, there is a case where the direction of the electric current that is electrically symmetric, that is, the current flowing in each coil is opposite. Therefore, there are a total of 14 operation modes of the power supply coil, namely, 8 quad mode, 4 half mode, and 2 all modes.

When the power supply coil has a rectangular shape, the operation mode of the power supply coil for generating the most advantageous induction electromotive force is different for the standard power collector. For example, in the case where the power supply coil has a rectangular shape, in order to prevent a section where the direction of the electromotive force induced in the standard power collector is reversed or a section where no induced electromotive force is generated, And the direction of the current supplied to the electrode. 6, it can be seen that the direction of the current supplied to each of the power feeding coils differs.

The shape and arrangement of the feeding coil

The feed coils shown in the preceding figures have a square shape and partially overlap each other. Hereinafter, the change of the magnetic field generated by the power supply coils according to the shape of the power supply coils and the overlapping area will be described.

8 is a table showing results of simulations of electromotive force induced in the current collector according to the standard while varying the aspect ratio and degree of superimposition of the feed coils. For comparison, even if the aspect ratio changes, the masses of the conductors of the respective feed coils were kept the same. The degree of overlapping was changed by moving each coil by the same distance in the x-direction and the y-direction toward the center of the feed coil device 110.

The simulation results are summarized as follows:

The higher the degree of overlap, the higher the induced electromotive force when the standard collector is located at the position coincident with the middle of the feeder, but the lower the induced electromotive force when the position deviation of the standard collector increases.

Regarding the aspect ratio, even if the aspect ratio does not change greatly, the electromotive force induced in the standard power collecting apparatus is greatly changed.

Regarding the shape of the feeding coil, it is considered to be advantageous that the rectangular shape is slightly rectangular. However, the difference in the electromotive force induced in the standard power collector according to the shape is not large, and it is also possible to have a square shape in consideration of the manufacturing conditions of the power supply coil.

The range of each variable in the illustrated embodiments based on the aspect ratio and overlapping degree of the feed coil device 110 identified in the simulation is as follows: The aspect ratio ranges from about 1.0 to about 1.1, A range of about 0.25 to about 0.55 relative to the inner area of each feed coil.

Current collector

Configuration of current collector

FIG. 9 is a schematic view of a current collecting coil device 210 having four coils according to an embodiment of the present invention and a current collecting device 200 using the same. The current collector 200 includes a current collector unit 210 and a rectifier module 230 having four current collectors 211, 212, 213 and 214. The current collecting coils 211, 212, 213 and 214 are connected to the rectifier module 230 via the switches 221, 222, 223 and 224, respectively. Rectifier module 230 provides DC power to load resistance or battery 300.

Fig. 10 shows an example of the feed coil device 210 shown in Fig. The same reference numerals denote the same elements, and the current collecting cores are not shown for convenience of explanation. Each of the four current collecting coils 211, 212, 213, and 214 shown in FIG. 10 has a substantially quadrangular shape, and the internal areas formed by the coils are partially overlapped with each other. Further, each of the coils has a rectangular shape having the same size. However, the shape of the current-collecting coil is not necessarily limited to a rectangle, and may be variously changed corresponding to a required magnetic flux pattern. In the embodiment shown in FIG. 10, the coils are superimposed on each other in the same manner, but the superposition method corresponding to the desired magnetic flux pattern can be variously changed.

In Fig. 11, one coil 210 of the four current-collecting coils of the current-collector unit 210 is shown. The current collecting coil 210 having a rectangular shape has a portion 210a recessed in one of two short sides. This concave portion 210a is formed at a position overlapping with other current collecting coils so that the height of the current collecting coil device 210 is not increased even if the four current collecting coils overlap each other. Since the current-collecting coil device 210 is disposed on the lower side of the vehicle, the lower the height, the better.

The current collecting coils 211, 212, 213 and 214 are connected to the rectifier module 2300 via switches 221, 222, 223 and 224, respectively. For example, each of the switches 221, 222, 223, and 224 is formed so as to switch the direction of power output from each of the current collecting coils 211, 212, 213, and 214. The power output from each of the current collecting coils 211, 212, 213, and 214 can be output in the same or opposite phases by the switching operation of the respective switches. Unlike the case of the power feeding coil, the power output from the power collecting coil is not cut off.

Operation mode of current collecting coil

Fig. 12 shows all possible operation modes of the current-sourcing coil device 210 according to an example of the present invention. In the quarter mode, currents induced in any one of the four current collectors are different, and currents induced in the other three current collectors are in the same direction. In the half mode, the current collectors adjacent to each other in the transverse or longitudinal direction are arranged in the same direction Current mode is induced, and the all mode is a case where a current in the same direction is induced in all of the four current-collecting coils. In each of the illustrated modes, there is a case where the directions of the electric currents flowing in the respective coils are opposite to each other. Therefore, the operation mode of the current-collecting coil is fourteen operating modes including eight quartz modes, four half modes, and two all modes.

13A to 13C show operation modes in which the highest electromotive force according to the position of the current collector coil according to the present invention is derived from a standard power feeding device, which is calculated and confirmed by simulation. In the figures, Z2min and Z2max denote the degree to which the current-collecting coil is vertically offset from the feed coil, and the numbers in parentheses indicate the distance in mm that the current-collecting coil has fallen in the x- and y- directions from the center of the feed coil .

13A, as the current-collecting coil according to the present invention is moved away from the center of the standard feed coil in the y-direction while maintaining the vertical position of Z2min, the operation mode of the current-collecting coil is the all-mode- . This trend is largely the same at the vertical position of Z2max, but at quarter point (0,275).

13B, as the current-collecting coil according to the present invention is moved away from the center of the standard feed coil in the x-direction while maintaining the vertical position of Z2min, the operation mode of the current-collecting coil is all-quarter- . At the vertical position of Z2max, the all mode is changed to the quota mode.

As shown in Fig. 13C, as the current-collecting coil according to the present invention moves away from the center of the standard feed coil while maintaining the vertical position of Z2min, the operation mode of the current-collecting coil is the all-mode (+ (-) mode. In the vertical position of Z2max, all mode - quarter mode - half mode - quarter mode are changed in order.

FIG. 14 is a graph showing a simulation result of the electromotive force induced in accordance with the mode of the current-collecting coil at each position in the x-axis and y-direction of the current-collecting coil according to the present invention with respect to the standard feed coil. As shown in the figure, when the current-collecting coil is maintained in the all-mode, a period of time in which the electromotive force induced in the current-collecting coil becomes zero appears. However, when the mode of the current-collecting coil is appropriately changed, it can be seen that the dead time does not appear.

The shape and arrangement of the current collecting coil

The current collecting coils shown in the preceding drawings have a rectangular shape and partially overlap each other. When the degree of overlapping of the current collecting coils is changed, the induced electromotive force is increased when the current collecting coils are positioned at the position where the current collecting coils coincide with the midpoint of the feed device, but the degree of decrease in the induced electromotive force . Regarding the aspect ratio, even if the aspect ratio does not change greatly, the electromotive force induced in the current-collecting coil largely changes.

In the illustrated embodiment, the current collecting coil has a rectangular shape, but may have a square shape. However, as a result of the simulation, it has been found that it is advantageous that the internal region of the current collecting coil is overlapped with a certain portion. Considering this point, the aspect ratio and overlap degree of the current collecting coil are summarized as follows. The aspect ratio of the current collecting coil is about 1-1.25, and the degree of overlapping is such that the internal area of the current collecting coil overlaps the long side of the current collecting coil And is preferably between approximately 0.35 and 0.65.

Control method

Feeding device control method

15 and 16 show a method of controlling a power supply apparatus having four power supply coils according to the present invention.

As shown in Fig. 15, the control method of the power feeding device includes the following steps (S100): powering the power feed coils so that each of the four power feed coils generates a magnetic field of the same magnitude in the same direction, Determining a position of an adjacent power collecting device (S200), and determining an operating mode of each of the power feeding coils based on the position of the adjacent cooing device. Based on the determined operation mode of each of the power feeding coils, the operation of each of the power feeding coils is controlled.

In step S200, the positions of the adjacent power collecting apparatuses are performed as follows by the method shown in Fig. 16: receiving information including the type of the power collecting apparatus by communicating with the power collecting apparatus (S210) (S230) of determining the position of the adjacent power collector based on information including a change in the state of each of the power feed coils detected (S230). The change in the state of each of the power supply coils includes at least one of a change in current flowing in each of the power supply coils, a change in applied voltage, a change in electric power, and a change in magnetic field. In step S230, the position of the current collector can be grasped by considering the information including the type of the current collector transmitted.

In the case where the current collector includes a plurality of current collecting coils, the information including the type of current collector in step S210 is added to the state of each current collecting coil generated by the magnetic field formed by the feeder, that is, , Magnetic field, and the like. Such a change in the state of the current-collecting coil may occur when the position of the current-collecting coil does not change, and may occur as the current-collecting device installed in the vehicle approaches from the remote to the power-feeding device. When the state of the current-collecting coil changes as the vehicle approaches, information related to the movement of the vehicle may also be transmitted to the power-feeding device.

In the case where communication with the current collecting device is not performed, the position of the current collecting device can be determined based only on the state change of each of the power feeding coils.

In step S230, various methods can be used to determine the position of the current collector based on the given information. In the present invention, based on simulation or experimental data, a machine learning technique such as a support vector machine or a neural network algorithm such as CNN or RNN is used.

By using a neural network algorithm as an example, map learning including a change in current generated in each of the power supply coils of a power feeding device by an adjacent power collecting device as an input and including the position of an adjacent power collecting device as an output, A position determination unit can be formed. The current collector position determination unit outputs information including the position of the adjacent current collector when information including a change in current generated in each of the power feed coils of the feeder unit is provided as an input. The input of the neural network algorithm may also include information on the type of the adjacent current collector and / or the state of the current collector coil that changes due to the magnetic field formed by the feeder.

Power collecting device control method

17 shows a method of controlling the operation mode of each of the current collecting coils in the current collector according to the present invention.

First, the state of the four current-collecting coils of the current collector is sensed (S210). To this end, electric power is supplied to the power-feeding device in advance to form a magnetic field, and the state of each current-collecting coil is changed by the magnetic field. The state of the current-collecting coil includes at least one of current, voltage, electric power, and magnetic field. The state of the current-collecting coil can be grasped while the current-collecting coil is stopped, or can be grasped continuously while the vehicle with the current-collecting coil is approaching the power-feeding device from a long distance.

Next, the position of the current collector is determined based on only the state of each of the current collecting coils sensed in step S210 or considering additional information (S220). The additional information includes information such as the type of the feeding device.

When the position of the current collector is determined, the operation mode of each current collector coil is determined using the information or the additional information (S230). Here, the additional information may include information on the operating mode of the feed device if the feed device is of a type capable of switching the operation mode. This is because the state of the current-collecting coil changes depending on the operation mode of the power-feeding device.

When the operation mode of each current-collecting coil is determined, the operation of each current-collecting coil is controlled accordingly.

In step S210, in order to determine the position of the current collector, the current collector may be provided with a current collector positioning unit. The power collector position locating part uses a machine learning or neural network algorithm like the power supply position locating part.

For example, when a neural network algorithm is used, map learning is performed based on simulation or experiment data, including the state of each current-collecting coil of the current collector as an input and the position of the current collector as an output. And uses the learned neural network algorithm to output information including the position of the wireless power collecting apparatus when information including the state of each current collecting coil of the current collecting apparatus is provided as an input.

Control of feeder and current collector

FIG. 18 shows the induced electromotive force generated in the current collector according to the operation mode of each device when the current-feeding device according to the present invention and the current-collecting device according to the present invention are used together.

As shown in the figure, in a state where both the feeding device and the current collecting device are fixed in the all mode, there is a period where induction electromotive force is not generated according to the position of the current collecting device. If the feed device is fixed in all mode and only the current collector is switched to the operation mode, there is no interval. When switching the operating mode of the power feeding device, the induced electromotive force generated in the current collecting device is further increased, and the induced electromotive force of the current collecting device is somewhat increased when switching between the operating mode of the power feeding device and the power collecting device.

Figs. 19A to 19D show how the operation mode of the power feeding device is switched, and when it does not, how it affects the position and operation mode of the power collecting device.

Referring to Figs. 19A and 19B, when the power feeding devices are all in the all mode state, the current collecting device is operated in a half mode or a quarter mode at positions 300 mm and 375 mm apart in the x- or y-direction, respectively, In this case, it operates in quota mode or all mode. On the other hand, referring to Figs. 19C and 19D, in the position deviated by 300 mm in the x-direction or the y-direction, all of the current collectors operate in the all mode and operate in the half mode or the all mode when they deviate from 375 mm.

19A to 19D, it can be seen that the magnitude of the electromotive force induced in the current collector increases when the power supply apparatus switches the operation mode.

Fig. 20 shows simulation results of the electromotive force induced in the power collecting device for each combination of the standard feeding device and the standard power collecting device and the combination of the power feeding device according to the present invention and the power collecting device according to the present invention. In the case of the device according to the present invention, it is a result of switching both the operation mode of the power supply device and the power collecting device.

As shown in the drawing, in the case of using the current-feeding device according to the present invention and the current-collecting device according to the present invention, compared to the case of using the current-feeding device and current-collecting device according to the standard, EMF is still high. Therefore, according to the present invention, it is possible to obtain a wireless power feeding system robust against positional deviation of the power collecting device.

FIG. 21 shows how each of the switches is operated to switch the operation mode of each of the power supply coils in the power supply apparatus according to the embodiment of the present invention shown in FIG. As shown in the figure, in order to operate in the all mode, SWA, SW2 and SW4 are closed and the remaining switches are opened. In order to operate in the half mode, SWB, SW1 and SW4 are closed and the remaining switches are opened. , SWC, SW2, SW3 are closed and the remaining switches are opened.

The resonant capacitor module shown in Fig. 21 is applicable not only to the power supply device but also to the current collecting device. That is, resonant capacitor modules and switches as shown between each current collecting coil and the rectifier module may be included.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

For example, it has been described that the phase of the current supplied to the power supply coil is changed by 180 degrees by switching the switch. However, the present invention is not limited to this, and the phase of the current may be continuously changed using the phase shifter. Similarly, although it has been described that the phase of the current output from the current-collecting coil is changed by 180 degrees by the switch, it is also possible to continuously change the phase of the current output using the phase shifter.

100: Feeding device
110: power supply coil device
111: first feeding coil
112: a second feed coil
113: third feeding coil
114: fourth feeding coil
115: power supply core
121: first feed coil switch
122: a second feed coil switch
123: Third feed coil switch
124: Fourth feeding coil switch
130: resonant capacitor module
140: Inverter
200: current collector
210: current collecting coil device
211: first collecting coil
212: second current collecting coil
213: Third collecting coil
214: Fourth current collecting coil
221: first current collecting coil switch
222: second current collecting coil switch
223: Third collecting coil switch
224: Fourth current collecting coil switch
230: Rectifier module
300: load

Claims (11)

A method for controlling a wireless power collecting apparatus including four current collecting coils electrically isolated from each other, the power collecting apparatus being partially overlapped with other adjacent current collecting coils,
(a) detecting a state of the four current collecting coils;
(b) determining a position of the wire current collector based on information including a state of each of the current collecting coils detected in the step (a);
(c) determining an operation mode of each of the current collecting coils based on information including the position of the current collector determined in the step (b); And
(d) adjusting an operation of each of the current collecting coils based on an operation mode of each of the current collecting coils determined in the step (c)
And a control unit for controlling the wireless power collecting apparatus.
The method according to claim 1,
The wireless power collecting apparatus uses a deep learning algorithm based on the simulation or experiment data and performs map learning including the state of each current collecting coil of the wireless power collecting apparatus as an input and the position of the wireless power collecting apparatus as an output, And outputting information including the position of the wireless power collecting apparatus when information including the state of each of the collecting coils of the wireless power collecting apparatus is provided as an input,
In the step (b), if the position of the wireless power collecting apparatus is determined by the current collecting unit position determining unit
And a control unit for controlling the power supply unit.
The method of claim 2,
In the step (b), the information for grasping the position of the wireless power collecting apparatus includes the type of the wireless power feeding apparatus
And a control unit for controlling the power supply unit.
The method of claim 3,
Wherein the type of the wireless power collecting apparatus is included as an input provided in the map learning of the current collector position determining unit
And a control unit for controlling the power supply unit.
The method according to claim 1,
Before said step (c), requesting said wireless power feeding apparatus to switch the power feeding mode,
Wherein, in the step (c), in order to determine an operating mode of each of the current collecting coils, information on a power feeding mode of the wireless power feeding apparatus is additionally used
And a control unit for controlling the power supply unit.
The method according to claim 1,
In the step (c), the operating mode of each of the current-collecting coils is determined such that the induced electromotive force induced in the current-collecting device does not become zero
And a control unit for controlling the power supply unit.
A power collecting device for receiving power wirelessly,
At least four current collecting coils disposed to partially overlap with other adjacent current collecting coils and electrically independent from each other;
A current collector position determination unit for outputting information including a position of the current collector when information including a change in current generated in each of the at least four current collectors is provided as an input;
A control unit for individually controlling operations of the four current collecting coils, wherein the control unit determines the position of the current collecting unit, determines an operation mode of each of the current collecting coils based on information including the determined position of the current collecting unit, A control unit for adjusting an operation of each of the current collecting coils based on an operation mode of each of the current collecting coils,
And the wireless power collecting device.
The method of claim 7,
Wherein the current collector position determination unit performs a map learning based on simulation or experiment data using a deep learning algorithm and including a state of each current collecting coil of the current collector as an input and a position of the current collector as an output, Outputting information including the position of the current collector when information including the state of each current-collecting coil of the apparatus is provided as an input
And the wireless power collecting device.
The method of claim 8,
Further comprising a communication unit for communicating with the adjacent power supply device
And the wireless power collecting device.
The method of claim 7,
The operating mode of each of the current collecting coils is determined so that the induced electromotive force induced in the current collecting device does not become zero
And the wireless power collecting device.
A current collecting coil device used in a current collecting device for receiving power wirelessly,
The four collectors have a quadrangular shape and are arranged so as to overlap with each other.
≪ / RTI >
Wherein each of the four current collecting coils is electrically independent of each other and each of the current collecting coils has an aspect ratio of between 1.0 and 1.25 and a ratio of overlapping one of the current collecting coils with another adjacent one of the power feeding coils is between 0.5 and 0.8
A current collecting coil device for a wireless power collecting device.

Images