KR101943973B1 - Car having wireless charger and electromagnetic wave reduction apparatus for the same - Google Patents

Abstract

In the electromagnetic wave attenuating apparatus for a vehicle provided with the wireless charging apparatus according to the present invention, one area of the vehicle body in which the wireless charging apparatus is installed is set so as to correspond to the radiation direction of the electromagnetic wave generated in the charging operation of the wireless charging apparatus installed inside the automobile A circumferential portion formed in a transverse direction in a radial direction; And a filter portion mounted in another region having a peripheral portion and including a coil having a closed loop shape and a capacitor connecting both ends of the coil, wherein the filter portion sets a frequency range of an electromagnetic wave for measuring the size of the generated electromagnetic wave And the inductance of the coil and the capacitance range of the capacitor are adjusted so that the magnitude of the electromagnetic wave measured during the set frequency range becomes a predetermined level or less.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a car having a wireless charging device and an electromagnetic wave attenuating device for the same.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automobile having a wireless charging device and an electromagnetic wave damping device therefor, and more particularly to a motor vehicle having a wireless charging device for attenuating electromagnetic waves generated in a charging operation of a wireless charging device, ≪ / RTI >

Recently, automobiles equipped with a wireless charging device capable of charging portable devices such as smart phones wirelessly are increasing.

When a smart phone is charged with a wireless phone in such a wireless charging device, AC power having a basic operating frequency is transmitted for wireless charging. At this time, harmonic electromagnetic waves having a fundamental operating frequency are generated.

Such harmonic electromagnetic waves, for example, may deteriorate the receiving sensitivity of the radio or may malfunction various electronic devices used in the automobile.

Also, interference due to harmonic electromagnetic waves does not guarantee the performance and safety of the vehicle's own computer system.

It is therefore an object of the present invention to provide an electromagnetic wave attenuating apparatus for an automobile for attenuating electromagnetic waves generated in a charging operation of a wireless charging apparatus in an automobile equipped with a wireless charging apparatus.

It is still another object of the present invention to provide an electromagnetic wave attenuating apparatus for an automobile which can be mounted so as to correspond to the radiation direction of an electromagnetic wave generated in the vicinity of an internal structure of a vehicle in which a wireless charging device is installed.

According to the present invention, there is provided an electromagnetic wave attenuating apparatus for a vehicle having a wireless recharging device, comprising: a motor vehicle having a wireless recharging device installed therein so as to correspond to a radiation direction of an electromagnetic wave generated in a charging operation of a wireless recharging device installed in an automobile A circumferential portion surrounding one region of the body and formed in the transverse direction in the radial direction; And a filter portion mounted in another region having a peripheral portion and including a coil having a closed loop shape and a capacitor connecting both ends of the coil, wherein the filter portion sets a frequency range of an electromagnetic wave for measuring the size of the generated electromagnetic wave And the inductance of the coil and the capacitance range of the capacitor are adjusted so that the magnitude of the electromagnetic wave measured during the set frequency range is equal to or less than a predetermined level.

According to the embodiment of the present invention, by attenuating the harmonic electromagnetic waves generated in the charging operation of the wireless charging device, the performance and safety of the electronic equipment used in the automobile and the self computer system of the automobile can be guaranteed.

Further, it is possible to provide an electromagnetic wave attenuating device that can be mounted in the form of a closed loop around the internal structure of a vehicle equipped with a wireless charging device so as to correspond to the radiation direction of the electromagnetic wave.

The filter unit may be formed to be enclosed or embedded in the peripheral portion located within a predetermined distance from the wireless charging device. Accordingly, it is possible to prevent the appearance from being hindered by being attached to the circumferential surface of the cradle on which the wireless charging device is installed in a closed loop form or by being mounted inside the circumferential surface.

The filter unit may be mounted at an angle of 0 ° to 90 ° with respect to a plane on which the wireless charging device is installed. Accordingly, it can be installed at various positions in consideration of the position of the stand where the wireless charging device is installed and the internal structure of the vehicle.

The filter unit may be formed on the outer circumference of the insulator case covered on the coil of the wireless charging device by being enclosed or embedded therein. Accordingly, it can be installed around the insulator case of the wireless charging device itself, not the cradle of the wireless charging device or the internal structure of the automobile.

The filter unit may be formed on the outer circumference of the non-slip pad on the insulator case of the wireless charging device. Accordingly, it can be provided on the wireless charging device itself or on the periphery of the rubber component charging pad separately mounted on the wireless charging device.

The controller may further include a controller for measuring the inductance of the coil and providing information for determining the size and shape of the closed loop of the coil based on the measured inductance of the coil. Accordingly, the size and shape of the closed loop of the coil can be adjusted in consideration of whether the inductance of the coil is in an appropriate range so as to attenuate electromagnetic waves.

The filter unit may further include a substrate for connecting both ends of the coil and the capacitor. Accordingly, in addition to the basic structure in which the closed loop type coil and the capacitor are connected, the electromagnetic wave attenuation device can be manufactured in a variety of structures using the PCB.

Wherein the filter unit further includes a pair of connectors connected to both ends of the plurality of wires when the coil is formed of a plurality of wires, Lt; / RTI > Accordingly, a closed loop type coil can be manufactured more easily by using a connector structure for connecting a plurality of wires and a plurality of wires.

Wherein the filter unit comprises: a pair of connectors connected to both ends of the plurality of wires when the coil is formed of a plurality of wires; And a substrate for connecting the pair of connectors and the capacitor. Accordingly, when a closed-loop type coil is manufactured using a plurality of wires, a configuration for connecting a coil on a PCB can be realized.

Wherein the coil is a conductor pattern corresponding to the coil, and the filter section comprises: a flexible substrate including the conductor pattern; And a substrate for connecting both ends of the conductor pattern and the capacitor. Accordingly, instead of fabricating a closed-loop coil using a wire, a conductor pattern corresponding to a single wire may be formed on the FPCB.

Wherein the coil is a conductor pattern corresponding to the coil, and the filter section includes: a flexible substrate including a conductor pattern and a pair of connector connection portions connected to both ends of the conductor pattern; And a substrate for connecting the pair of connectors corresponding to the connector connection part and the capacitor. Accordingly, the closed loop type coil can also be realized by a method of forming a conductor pattern corresponding to a plurality of wires on the FPCB.

The filter unit may be formed by enclosing or embedding a conductor pattern corresponding to the coil in the peripheral portion. Accordingly, a conductor pattern corresponding to a closed-loop type coil may be formed on the outside or inside of the peripheral surface of the cradle of the wireless charging apparatus to provide the same electromagnetic wave damping effect.

The above object can also be achieved by a vehicle provided with a wireless charging device including an electromagnetic wave attenuating device for an automobile in a vehicle provided with a wireless charging device according to the present invention. Accordingly, when the automobile is mass-produced, the automobile can be manufactured in a form in which a wireless charging device and a configuration for attenuating electromagnetic waves are mounted in the automobile.

As described above, according to the present invention, in the electromagnetic wave attenuating apparatus for a vehicle provided with the wireless charging apparatus, the electromagnetic wave generated in the charging operation of the wireless charging apparatus is attenuated.

Further, according to the present invention, there is an effect of providing an electromagnetic wave attenuator which can be easily mounted so as to correspond to the radiation direction of electromagnetic waves generated in the vicinity of the internal structure of a vehicle in which the wireless charging device is installed.

1 is an illustration showing an internal configuration of a vehicle equipped with an electromagnetic wave attenuator according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an operation between the wireless charging device and the electromagnetic wave damping device according to the embodiment of the present invention.
3 is an internal perspective view showing an example of mounting of an electromagnetic wave damping device for a vehicle according to an embodiment of the present invention.
4 is an internal perspective view showing an example of mounting an electromagnetic wave attenuator for a vehicle according to an embodiment of the present invention.
5 is an internal perspective view showing an example of mounting an electromagnetic wave attenuator for a vehicle according to an embodiment of the present invention.
6 is an internal perspective view showing an example of mounting an electromagnetic wave attenuating apparatus for an automobile according to an embodiment of the present invention.
7 is a perspective view showing an example of mounting an electromagnetic wave attenuator for a vehicle mounted on a wireless charging device according to an embodiment of the present invention.
8 is a perspective view showing an example of mounting an electromagnetic wave attenuating apparatus for a vehicle mounted on a wireless charging apparatus according to an embodiment of the present invention.
9 is a control block diagram of an electromagnetic wave attenuating apparatus for an automobile according to an embodiment of the present invention.
10 is an example showing the configuration of a filter unit according to an embodiment of the present invention.
11 illustrates an example of a configuration of a filter unit using a plurality of wires according to an embodiment of the present invention.
12 illustrates an example of a configuration of a filter unit using a plurality of wires and a PCB according to an embodiment of the present invention.
FIG. 13 is a diagram illustrating a configuration of a filter unit using an FPCB and a PCB according to an embodiment of the present invention.
FIG. 14 is a view illustrating a configuration of a filter unit using an FPCB and a PCB according to an embodiment of the present invention.
Fig. 15 is an illustration showing a configuration of a filter unit formed on a surface of a wireless charging device cradle according to an embodiment of the present invention.
16 is an example of a configuration of a multiple filter unit according to an embodiment of the present invention.
17 is a graph showing impedance graphs of frequency bands of electromagnetic waves by the filter unit according to an embodiment of the present invention.
18 is a graph showing impedance graphs of frequency bands of electromagnetic waves by the multiple filter unit according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

1 is an illustration showing an internal configuration of a vehicle equipped with an electromagnetic wave attenuator according to an embodiment of the present invention. 1, an automobile 1 according to an embodiment of the present invention includes a body 11, a wireless charging device 12, and an electromagnetic wave attenuator 10.

The body 11 is an internal structure of the automobile 1 and includes all the automobile parts mounted around the driver's seat, the assistant seat and the rear magnet. For example, the body 11 includes a dash panel, a horn, an airbag, an A / V device, a heater and an air conditioner, a glove box, a shift lever, an AUTO HOLD, an electronic parking brake,

The wireless charging device 12 is configured to charge a wireless communication device (not shown), such as a smart phone, and is installed in one area of the vehicle body 11. The wireless charging device 12 may be installed, for example, on a wireless charging device cradle (not shown) provided around the shift lever between the driver's seat and the assistant's seat. In one embodiment, the wireless charging device 12 and the wireless charging device holder may be manufactured in the form of being mounted on the vehicle body 11 when the vehicle is produced.

The wireless charging device 12 may be installed to be fixed to one area of the vehicle body 11, or may be installed in an attachable and detachable form. For example, when the wireless charging device 12 is fixedly installed in one area of the vehicle body 11, only the charging pad on which the wireless communication device is mounted is visible to the user, ) So as not to be viewed by the user.

The electromagnetic wave attenuator 10 is configured to attenuate electromagnetic waves generated in the charging operation of the wireless charging device 12 and is installed around one area of the vehicle body 11 in which the wireless charging device 12 is installed.

The electromagnetic wave attenuator 10 can be manufactured in the form of being mounted on the body 11 of the vehicle at the time of production of the vehicle, like the wireless charging device 12 and the wireless charging device holder (not shown).

As another example, the electromagnetic wave attenuator 10 may be installed in a form that can be attached to and detached from the peripheral surface of the wireless charging device stand, or may be built inside the peripheral surface of the wireless charging device stand through a tuning operation of the vehicle.

As another example, the electromagnetic wave attenuator 10 may be attached to or embedded in an outer portion of an insulating lid case that covers the coil of the wireless charging device 12. Further, Anti-slip filler pad attached to the insulating lid case of the base 12 as shown in FIG.

FIG. 2 is a diagram illustrating an operation between the wireless charging device and the electromagnetic wave damping device according to the embodiment of the present invention. As shown in FIG. 2, the wireless charging device 12 charges the wireless communication device 13 by placing the wireless communication device 13 on the charging pad. As another example, the wireless charging device 12 can charge the wireless communication device 13 within a predetermined distance from the charging pad.

The wireless charging device 12 is configured to charge the wireless communication device 13 and includes a charging coil Coil, an insulator case covering the coil, and a charging pad PAD ), PWR / GND, and control signal connection cable.

The wireless charging device 12 performs power transmission to the wireless communication device 13 including the reception (Rx) coil using the charging coil corresponding to the transmission (Tx) coil.

Specifically, the wireless charging device 12 generates high-power and high-frequency signals required for power transmission in the transmission circuit, and generates a magnetic field when the generated high-power and high-frequency signals are input to the transmission coil. At this time, an induced current is generated while the magnetic field generated in the transmission coil passes through the reception coil of the wireless communication device 13, and the generated induced current is rectified through the reception circuit and DC-converted and supplied as charge energy.

In this way, the wireless charging device 12 supplies the charging energy to the wireless communication device 13, and harmonic electromagnetic waves are generated by the high-power and high-frequency signals generated at this time.

The electromagnetic wave attenuator 10 is a device for attenuating electromagnetic waves generated in the charging operation of the wireless charging device 12 and is installed around one area of the vehicle body 11 in which the wireless charging device 12 is installed. For example, the electromagnetic wave attenuator 10 may be installed on or attached to the circumferential surface of a wireless charging device holder (not shown) on which the wireless charging device 12 is mounted.

In one embodiment, the electromagnetic wave attenuator 10 may be mounted on an insulator case of the wireless charging device 12 itself, or on a filling pad made of rubber. In this case, the electromagnetic wave attenuator 10 may be attached or embedded around an outer portion of the insulator case covering the transmission coil of the wireless charging device 12. [ The electromagnetic wave attenuator 10 may also be attached or embedded around an outer portion of a rubber-made filling pad that is attached to the insulator case of the wireless charging device 12. [

The electromagnetic wave attenuator 10 further includes a peripheral portion 1010 and a filter portion 101 and further includes a control portion 104 as a configuration for controlling the filter portion 101. [ The control process of the control unit 104 will be described in detail with reference to FIG.

The peripheral portion 1010 surrounds a region of the vehicle body 11 in which the wireless charging device 12 is installed so as to correspond to the radiation direction of the electromagnetic wave generated in the charging operation of the wireless charging device 12, do. That is, the peripheral portion 1010 has a shape corresponding to the circumference of the structure in which the wireless charging device 12 is installed among the internal structures of the automobile. For example, when the wireless charging device 12 is mounted in a wireless charging device cradle (not shown), the periphery 1010 corresponds to the circumferential surface of the wireless charging device cradle. The perimeter 1010 may also be amorphous in conformity with the shape of the structure surrounding the wireless charging device and may be continuous to the exterior or interior, top, or sidewall, or top and sidewall, of the perimeter.

The filter unit 101 is mounted on another region of the vehicle body 11 having the peripheral portion 1010 and includes a coil having a closed loop shape and a capacitor connected to both ends of the coil ). The filter unit 101 may be formed on the peripheral portion 101 located within a predetermined distance from the wireless charging device 12 by being enclosed or embedded therein.

In one embodiment, the filter portion 101 may be mounted at an angle within an angle of 0 to 90 with respect to the plane in which the wireless charging device 12 is installed. For example, when the wireless charging device 12 is installed horizontally in the vehicle, the filter portion 101 may be configured to surround the periphery of the peripheral structure of the wireless charging device 12 in the same horizontal direction as the wireless charging device 12 As shown in FIG.

In other cases, when the wireless charging device 12 is installed in the vehicle in a direction perpendicular to the plane to charge the wireless communication device 13 vertically, the filter portion 101 is connected to the wireless charging device 12, And a circumferential surface of the peripheral structure in a horizontal direction at an angle of 90 [deg.]. In addition, the filter unit 101 may be installed at a predetermined angle with the wireless charging device 12 according to the form in which the wireless charging device 12 is installed in the vehicle.

The filter unit 101 is mounted in a state in which the inductance of the coil and the capacity range of the capacitor are adjusted so that the size of the electromagnetic wave generated in the charging operation of the wireless charging device 12 becomes a predetermined level or less. At this time, the frequency range of the electromagnetic wave to be attenuated is set, and the magnitude of the electromagnetic wave is measured during the set frequency range. For example, you can set the frequency range from 530KHz to 1,000KHz or 80MHz to 100MHz, and determine the area, shape, and winding of the coil so that the inductance value of the coil is 0.05μH to 500μH during the set frequency range.

Also. The range of capacitor values connecting both ends of the coil is determined using the set frequency range and the measured inductance value. As an example, the range of the capacitor value can be determined as a value at which the electromagnetic wave is attenuated to the maximum within 10 pF to 100 μF.

The electromagnetic wave attenuator 10 can effectively attenuate the harmonic electromagnetic waves generated in the charging operation of the wireless charging device 12 by using the configuration of the peripheral portion 1010 and the filter portion 101. [ This can ensure the performance and safety of electronic equipment used in a car and its own computer system of an automobile.

3 is an internal perspective view showing an example of mounting of an electromagnetic wave damping device for a vehicle according to an embodiment of the present invention. In the illustrated example, the wireless charging device 12 is mounted horizontally around the shift lever between the driver's seat and the assistant seat among the internal structures of the vehicle. In this case, the wireless communication device 13 is charged by placing it on the charging pad of the wireless charging device 12. At this time, in order to attenuate the electromagnetic wave generated at the time of charging, the electromagnetic wave attenuator 10 is installed so as to surround the peripheral surface of the peripheral structure in a horizontal direction parallel to the plane where the wireless charging device 12 is installed.

The electromagnetic wave attenuator 10 includes a peripheral portion 1010 corresponding to the peripheral surface of the peripheral structure and a filter portion 101 mounted on one area of the peripheral structure having the peripheral portion 1010. [

The peripheral portion 1010 is formed in the lateral direction in the radial direction so as to correspond to the radiation direction of the electromagnetic wave generated in the charging operation of the wireless charging device 12. [

The filter unit 101 includes a closed loop coil and a capacitor connecting both ends of the coil. The filter unit 101 attenuates the electromagnetic wave by controlling the inductance value of the coil and the capacitance range of the capacitor to control the reverse current to the electromagnetic wave .

Accordingly, in the illustrated example, the filter unit 101 is installed so as to surround the surrounding structure in the horizontal direction parallel to the plane where the wireless charging device 12 is installed, thereby effectively attenuating the electromagnetic wave.

4 is an internal perspective view showing an example of mounting an electromagnetic wave attenuator for a vehicle according to an embodiment of the present invention. In the illustrated example, the wireless charging device 12 is mounted in an inclined manner inside a structure provided with a cover 1210 around the shift lever between the driver's seat and the assistant's seat. In this case, the wireless communication device 13 enters the structure in which the wireless charging device 12 is located along the inclined direction to charge the wireless communication device 13.

At this time, in order to attenuate the electromagnetic wave generated at the time of charging, the electromagnetic wave attenuator 10 (for example, the electromagnetic wave attenuator 10) is wound around the periphery of the cover 1210 at a position, ).

A circumferential portion 1010 is formed at a position corresponding to the circumferential surface of the cover 1210 when the electromagnetic wave attenuator 10 is installed and a closed loop coil 1010 is formed in one region of the peripheral structure including the circumferential portion 1010, And a filter unit 101 composed of a capacitor.

Thus, in the illustrated example, the filter unit 101 is installed so as to surround the peripheral structure such as the cover 1210 at a position that is at a predetermined angle with the plane where the wireless charging device 12 is installed, thereby effectively attenuating the electromagnetic wave .

5 is an internal perspective view showing an example of mounting an electromagnetic wave attenuator for a vehicle according to an embodiment of the present invention. The illustrated example is when the wireless charging device 12 is mounted horizontally in a tilted structure with a cover 1210 around the shift lever between the driver's seat and the assistant's seat. In this case, the wireless communication device 13 is charged by placing it on the wireless charging device 12 in the structure.

At this time, in order to attenuate electromagnetic waves generated upon charging, the electromagnetic wave attenuator 10 is wound around the cover 1210 at a position at an angle of, for example, 45 degrees with respect to the plane where the wireless charging device 12 is installed Install it.

A circumferential portion 1010 is formed at a position corresponding to the circumferential surface of the cover 1210 when the electromagnetic wave attenuator 10 is installed and a closed loop coil 1010 is formed in one region of the peripheral structure including the circumferential portion 1010, And a filter unit 101 composed of a capacitor.

As described above, in the illustrated example, the filter unit 101 is installed to surround the surrounding structure at a predetermined angle with the plane where the wireless charging device 12 is installed, so that the electromagnetic wave can be effectively attenuated.

6 is an internal perspective view showing an example of mounting an electromagnetic wave attenuating apparatus for an automobile according to an embodiment of the present invention. The illustrated example is the case where the wireless charging device 12 is mounted vertically in a housing structure with a cover 1210 located in the middle of the rear magnet. In this case, the wireless communication device 13 is drawn along the vertical direction in which the wireless charging device 12 is mounted into the housing structure and charged.

At this time, in order to attenuate electromagnetic waves generated during charging, the electromagnetic wave attenuator 10 is installed along the peripheral surface of the housing structure at positions at various angles to the vertical plane in which the wireless charging device 12 is installed.

In the illustrated example, the electromagnetic wave attenuator 10 has a first direction that is parallel to the plane where the wireless charging device 12 is installed, a second direction that is 45 degrees with the installed plane, and a third direction that is perpendicular to the installed plane So as to surround the peripheral surface of the housing structure.

The circumferential portion 1010 is formed at a position corresponding to the circumferential surface of the housing structure so as to be bent along the first direction, the second direction, and the third direction when the electromagnetic wave attenuator 10 is installed, A filter portion 101 composed of a coil and a capacitor in the form of a closed loop is mounted on one region of the surrounding structure.

In this way, in the illustrated example, the filter unit 101 is installed so as to surround the surrounding structure at various angles with the plane where the wireless charging device 12 is installed, thereby effectively attenuating the electromagnetic wave.

7 is a perspective view showing an example of mounting an electromagnetic wave attenuator for a vehicle mounted on a wireless charging device according to an embodiment of the present invention. As shown in Fig. 7, the electromagnetic wave attenuator 10 may be mounted in the wireless charging device 12 itself, not in the vehicle interior structure or the wireless charging device holder.

In the illustrated example, the wireless charging device 12 is in the form of an insulating case 128 of a lid function being covered on a transmission coil included in the device. At this time, the electromagnetic wave attenuator 10 is attached or embedded along the outer periphery of the insulator case 128.

A filter portion 101 composed of a coil and a capacitor in the form of a closed loop is mounted on the outer periphery of the insulator case 128 when the electromagnetic wave attenuator 10 is installed.

As described above, in the illustrated example, the filter portion 101 is installed so as to surround the insulator case 128 of the wireless charging device 12 itself, thereby effectively attenuating the electromagnetic wave.

8 is a perspective view showing an example of mounting an electromagnetic wave attenuating apparatus for a vehicle mounted on a wireless charging apparatus according to an embodiment of the present invention. 8, the electromagnetic wave attenuator 10 may be mounted on the wireless charging device 12 itself or around the charging pad 129, which is separately mounted on the wireless charging device 12.

In the illustrated example, the wireless charging device 12 is mounted on the insulator case 128 with a charging pad 129 to prevent slippage. The charging pad 129 is made of, for example, a rubber material so as to prevent the wireless communication device 13 placed in the wireless charging device 12 from slipping. At this time, the electromagnetic wave attenuator 10 is attached or embedded along the outer periphery of the charging pad 129.

A filter portion 101 composed of a coil and a capacitor in the form of a closed loop is mounted on the outer periphery of the filling pad 129 when the electromagnetic wave attenuator 10 is installed.

Thus, in the illustrated example, the filter unit 101 is installed so as to surround the periphery of the charging pad 129, which is provided in the wireless charging apparatus 12 itself or separately mounted on the wireless charging apparatus 12, Can be attenuated.

9 is a control block diagram for designing an electromagnetic wave attenuating apparatus for an automobile according to an embodiment of the present invention. As shown in Fig. 9, the filter unit 101 and the control unit 104 are provided when designing a configuration for attenuating electromagnetic waves generated in a wireless charging device for an automobile by the electromagnetic wave attenuator 10. The electromagnetic wave attenuator 10 is mounted at a position corresponding to the radiation direction of the electromagnetic wave generated in the charging operation of the wireless charging device 12 to attenuate the electromagnetic wave.

The electromagnetic wave attenuator 10 surrounds one area of the vehicle in which the wireless charging device 12 is installed so as to correspond to the radiation direction of the electromagnetic wave generated in the charging operation of the wireless charging device 12 installed in the interior of the vehicle, (Not shown). The configuration of the peripheral portion 1010 has been described above with reference to FIGS. 2 to 6, and will not be described in the control block diagram shown.

The filter unit 101 includes a closed loop type coil 102 and a capacitor 103 connecting both ends of the coil. The filter portion 101 is mounted in another region of the vehicle body 11 having the peripheral portion 1010. [

The filter unit 101 sets the frequency range of the generated electromagnetic waves and adjusts the inductance of the coil 102 and the capacity range of the capacitor 103 so that the magnitude of the electromagnetic wave measured during the set frequency range becomes a predetermined level or less Respectively.

The control unit 104 performs a control operation for determining the inductance of the coil 102 and the capacitance range of the capacitor 103 in configuring the filter unit 101. [

The control unit 104 sets the frequency range of the generated electromagnetic wave and measures the inductance of the coil 102 during the set frequency range. For example, the frequency range of an electromagnetic wave to be attenuated can be set to 530 KHz to 1,000 KHz or 80 MHz to 100 MHz.

At this time, the control unit 104 provides information for determining the size and shape of the closed loop of the coil 102 based on the measured inductance of the coil 102. [ For example, the area, shape, and winding angle of the coil 102 are determined so that the range of the inductance value of the coil 102 is, for example, 0.05 μH to 500 μH.

Also, the controller 104 determines the value of the capacitor 103 connecting both ends of the coil 102 using the set frequency range and the measured inductance value. As an example, the range of the capacitor value can be determined as a value at which the electromagnetic wave is attenuated to the maximum within 10 pF to 100 μF.

In one embodiment, the control unit 104 may perform the following two methods to determine the value of the capacitor 103 in the filter unit 101. For example,

As a first method, a filter unit 101 in which a variable capacitor having a predetermined capacitor value range is connected in series to a coil 102 is mounted around the internal structure of a vehicle in which the wireless charging device 12 is installed. At this time, the capacity adjustment position of the variable capacitor is fixed while the electromagnetic wave is most effectively reduced while adjusting the capacity adjustment position of the variable capacitor. Accordingly, the capacitance value of the fixed variable capacitor is measured and determined as the capacitance value of the final capacitor to be applied to the filter unit 101.

As a second method, a filter unit 101 in which a capacitor having a minimum value (or a maximum value) of a capacitor value range is connected in series to the coil 102 is mounted around the internal structure of the automobile in which the wireless charging device 12 is installed. In this case, the size of the electromagnetic wave is firstly measured in a desired frequency band, and a capacitor whose capacity is increased to a value larger than the minimum value is replaced or a capacitor whose capacity is reduced to a value smaller than the maximum value is replaced. Measure again. As described above, the magnitude of the electromagnetic wave is repeatedly measured by increasing or decreasing the value of the capacitor, and the capacitance value of the final capacitor to be applied to the filter unit 101 is determined .

When the capacitance value of the final capacitor is determined by using any one of the above two methods, the filter unit 101 connected to the capacitor 103 finally determined in the coil 102 is mounted, and finally the attenuation effect of the electromagnetic wave .

As described above, according to the embodiment of the present invention, in order to effectively attenuate the electromagnetic wave generated in the charging operation of the wireless charging device, the electromagnetic wave attenuator Can be provided.

10 is an example showing the configuration of a filter unit according to an embodiment of the present invention. 10, the filter unit 101 is constituted by a closed-loop-shaped coil 102 and a capacitor 103 connecting both ends of the coil 102. [ At this time, the coil 102 is manufactured by winding a wire made of a conductor and an insulator in a closed loop form. By way of example, the wire may include one or more conductive cores so as to have a diameter of about 3 mm or less in the inside, and may include an insulator of about 2 mm or less in thickness on the outside.

The coil 102 may be formed in various shapes such as a circular shape, an elliptical shape, a square shape, a bent shape, or a combination thereof so as to be mounted around one area of the automobile body 11 in which the wireless charging device 12 is installed .

The capacitor 103 connects both ends of the coil 102 and functions as an adjusting circuit for attenuating electromagnetic waves.

The capacitor 103 determines a capacitance value capable of attenuating the electromagnetic wave to the maximum by using the frequency range set for electromagnetic wave attenuation and the inductance value of the coil 102. That is, by installing the filter unit 101 to which the capacitance value of the capacitor 103 determined as described above is applied, the electromagnetic wave generated in the charging operation of the wireless charging device 12 can be effectively attenuated.

In one embodiment, the circuit may further include a PCB (Printed Circuit Board) (not shown) for connecting both ends of the coil 102 and the capacitor 103. In this case, the capacitor 103 is not directly connected to both ends of the coil 102, but is connected using a substrate.

In the present embodiment, the wireless charging device 12 supplies charging energy to the wireless communication device 13 using the charging coil 122, which is a transmission coil (in Fig. 10, the wireless communication device 13 and the receiving coil Not shown). At this time, an electromagnetic wave is generated by the transmission of the high output signal, and the electromagnetic wave is radiated along the Z direction.

At this time, the filter unit 101 is disposed along the transverse direction of the electromagnetic wave radiation direction 80 in order to attenuate the generated electromagnetic wave. In the illustrated example, the electromagnetic wave radiation direction 80 corresponds to the Z direction, and the lateral direction of the electromagnetic wave radiation direction 80 corresponds to the X-Y direction corresponding to the plane on which the wireless charging device 12 is installed.

According to the embodiment of the present invention described above, the filter portion 101 including the constitution of the closed loop type coil 102 and the capacitor 103 is disposed along the transverse direction in the electromagnetic wave radiation direction, 12 can be effectively attenuated.

11 illustrates an example of a configuration of a filter unit using a plurality of wires according to an embodiment of the present invention. 11, the filter unit 101 is composed of a coil 102, a pair of connectors 1061 and 1062 connected to both ends of the coil 102, and a capacitor 103. At this time, the coil 102 is wound around a plurality of wires, that is, a first wire 1021, a second wire 1022, a third wire 1023, a fourth wire 1024, It is made in harness.

A pair of connectors 1061 and 1062 are connected to both ends of the plurality of wires, and the connectors 1061 and 1062 are directly connected to each other. At this time, the pair of connectors 1061 and 1062 connect each terminal of the connectors 1061 and 1062 to a plurality of wires so that a plurality of wires are connected in a closed loop form. As an example, one end of the first wire 1021 is connected to the first terminal of the connector 1061, and the other end is connected to the second terminal of the connector 1062. One end of the second wire 1022 is connected to the second terminal of the connector 1061 and the other end of the second wire 1022 is connected to the third terminal of the connector 1062.

By connecting both ends of each of the plurality of wires with each terminal of the pair of connectors 1061 and 1062 in this manner, a plurality of wires can be connected in a closed loop form.

In the illustrated example, the pair of connectors 1061 and 1062 are provided in a female connector and a male connector, respectively, so as to be directly connected to each other

The capacitor 103 is connected to the fourth wire 1024 of the plurality of wires connected to the pair of connectors 1061 and 1062.

According to the embodiment of the present invention as described above, the closed loop type coil 102 is formed by using the configuration of the connectors 1061 and 1062 connecting the plurality of wires 1021, 1022, 1023, and 1024 and the plurality of wires. It can be manufactured more easily.

12 illustrates an example of a configuration of a filter unit using a plurality of wires and a PCB according to an embodiment of the present invention. 12, the filter unit 101 includes a coil 102, a pair of connectors 1061 and 1062 connected to both ends of the coil 102, a PCB 20 and a capacitor 103 . At this time, the coil 102 is wound around a plurality of wires, that is, a first wire 1021, a second wire 1022, a third wire 1023, a fourth wire 1024, It is made in harness.

A pair of connectors 1061 and 1062 are connected to both ends of the plurality of wires. At this time, the pair of connectors 1061 and 1062 connect each terminal of the connectors 1061 and 1062 to a plurality of wires so that a plurality of wires are connected in a closed loop form. As an example, one end of the first wire 1021 is connected to the first terminal of the connector 1061, and the other end is connected to the second terminal of the connector 1062. One end of the second wire 1022 is connected to the second terminal of the connector 1061 and the other end of the second wire 1022 is connected to the third terminal of the connector 1062.

In the illustrated example, the pair of connectors 1061 and 1062 are not directly connected to each other. And is connected using the PCB 20. At this time, a connection pattern 201 for connecting the terminals of the connectors 1061 and 1062 to each other is formed on the PCB 20.

The capacitor 103 is connected to any one of the connection patterns 201 formed on the PCB 20.

In one embodiment, in connecting a plurality of wires to form a closed-loop coil 102, a pair of first connectors connected to the ends of the plurality of wires, A pair of second connectors provided separately for the male and female connectors may be separately formed.

According to the embodiment of the present invention, when the closed loop type coil 102 is manufactured by using the plurality of wires 1021, 1022, 1023, and 1024, the plurality of wires 1021, 1022, 1023, and 1024 may be implemented.

FIG. 13 is a diagram illustrating a configuration of a filter unit using an FPCB and a PCB according to an embodiment of the present invention. 13, the filter portion 101 includes a closed loop-shaped conductor pattern 1025, an FPCB (Flexible PCB) 22 on which a conductor pattern 1025 is formed, and a conductor pattern 1025 A PCB 20 connecting both ends, and a capacitor 103. At this time, the conductor pattern 1025 has a structure corresponding to the closed loop type coil 102 made up of a single wire in the configuration of Fig. 10, and has a closed loop type pattern corresponding to the coil 102 on the FPCB 22 . In this embodiment, the formation surface of the conductor pattern 1025 is arranged along the transverse direction of the electromagnetic wave radiation direction.

The PCB 20 connects both ends of the conductor pattern 1025 and the capacitor 103. In this case, the capacitor 103 is not connected directly to both ends of the conductor pattern 1025, but is connected using a pattern on the PCB 20.

According to the embodiment of the present invention as described above, the closed loop type coil may be formed by using a wire instead of the conductor pattern 1025 corresponding to the coil on the FPCB 22.

FIG. 14 is a view illustrating a configuration of a filter unit using an FPCB and a PCB according to an embodiment of the present invention. 14, the filter portion 101 includes a plurality of conductor patterns 1025, an FPCB 22 formed with a plurality of conductor patterns 1025, a PCB 20 connected to the FPCB 22, And a capacitor 103. The FPCB 22 includes a pair of connector connection portions 221 provided at both ends of the FPCB 22 and a pair of connectors 22 provided at both ends of the PCB 20, The connector 203 of FIG.

In the illustrated example, the plurality of conductor patterns 1025 correspond to the coils 102 composed of the plurality of wires 1021, 1022, 1023, and 1024 in the configuration of Fig. 12, And patterns corresponding to the wires 1021, 1022, 1023, and 1024 are formed. In this embodiment, the formation surface of the conductor pattern 1025 is arranged along the electromagnetic wave radiation direction.

The pair of connector connecting portions 221 are formed at both ends of the plurality of conductor patterns 1025 and are provided with a pair of connectors 203 provided on the PCB 20 for connecting the FPCB 22 to the PCB 20. [ Lt; / RTI >

The PCB 20 forms a connection pattern 202 for connecting the respective terminals of the pair of connectors 203.

The capacitor 103 is connected to any one of the connection patterns 202 formed on the PCB 20. [

According to the embodiment of the present invention as described above, it is also possible to form a closed loop type coil by forming a conductor pattern 1025 corresponding to a plurality of wires on the FPCB 22.

Fig. 15 is an illustration showing a configuration of a filter unit formed on a surface of a wireless charging device cradle according to an embodiment of the present invention. 15, the filter unit 101 is formed in the inner structure of the automobile in which the wireless charging device 12 is installed, for example, in the peripheral portion 1010 of the wireless charging device holder 130. That is, the filter unit 101 is implemented by a method of directly forming the conductor pattern 1025 on the surface or the inside of the peripheral portion 1010, instead of being mounted on the peripheral portion 1010 of the wireless charging device stand 130 do. In this embodiment, the formation surface of the conductor pattern 1025 is arranged along the electromagnetic wave radiation direction.

At this time, the filter unit 101 includes a capacitor 103 connecting the conductor pattern 1025 corresponding to the closed loop type coil and both ends of the conductor pattern 1025.

According to the embodiment of the present invention as described above, a conductor pattern corresponding to a closed-loop coil can be directly formed on the outside or inside of the circumferential surface of the structure itself in which the wireless charging device is installed to provide the same electromagnetic wave damping effect

16 is an example of a configuration of a multiple filter unit according to an embodiment of the present invention. As shown in FIG. 16, the electromagnetic wave attenuator 10 may be implemented using the multiple filter unit 140. The multiple filter unit 140 includes a plurality of coils 142 including a plurality of coils and a plurality of capacitors 143 including a plurality of capacitors. In this embodiment, the formation surface of the conductor pattern 1025 is arranged along the electromagnetic wave radiation direction or along the lateral direction in the electromagnetic wave radiation direction. Each of the coils and capacitors forming the multiple coils 142 and the multiple capacitors 143 of the multiple filter unit 140 may adopt coils and capacitors according to the embodiments of FIGS. 10 to 15 or a combination thereof.

In this case, it is possible to attenuate electromagnetic waves having a wider and diverse frequency band by using the configuration of the multiple filter unit 140. [

17 is an example of an impedance graph 150 for each frequency band of electromagnetic waves by the filter unit according to an embodiment of the present invention. In the graph shown in FIG. 1, the impedance of each frequency band of the electromagnetic wave is measured when the filter unit 101 is composed of one coil and one capacitor. In this case, it is shown that the magnitude of the impedance in the first frequency band 151 of the entire frequency band is decreasing. That is, when the filter unit 101 composed of one coil and one capacitor is used, the attenuation effect of electromagnetic waves in a specific frequency band can be expected.

FIG. 18 is a graph showing an impedance graph 160 for each frequency band of an electromagnetic wave by the multiple filter unit according to an embodiment of the present invention. The illustrated graph is a measurement of the impedance of each frequency band of the electromagnetic wave in the case of a multi-filter unit 140 including multiple coils 142 and multiple capacitors 143. In this case, the magnitudes of the impedances in the first frequency band 161, the second frequency band 162, the third frequency band 163, and the fourth frequency band 164 of the entire frequency band decrease. That is, in the case of using the multiple filter unit 140 composed of the multiple coils 142 and the multiple capacitors 143, it is expected that the effect of attenuating electromagnetic waves in a wider and diverse frequency band is expected compared with the case of using one coil and one capacitor .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

1: Automotive
10: Electromagnetic wave attenuator
11: Body
12: Wireless charging device
13: Wireless communication device
1010:
101:
102: Coil
103: Capacitor
104:
128: Insulator case
129: Charging Pad
140:
142: multiple coils
143: Multi-
20: PCB
22: FPCB

Claims (13)

In an electromagnetic wave attenuating apparatus for a vehicle having a wireless charging device,
A circumferential portion formed in a transverse direction in a radial direction to cover one area of an automobile body provided with the wireless charging device so as to correspond to a radiation direction of electromagnetic waves generated in a charging operation of the wireless charging device installed in the automobile;
And a filter portion mounted in another region having the peripheral portion and including a coil having a closed loop shape and a capacitor connecting both ends of the coil,
Wherein the filter unit sets a frequency range of an electromagnetic wave for measuring the magnitude of the generated electromagnetic wave and sets the inductance of the coil and the capacity range of the capacitor so that the magnitude of the electromagnetic wave measured during the set frequency range is less than a predetermined level Mounted in a regulated state,
Wherein the filter unit comprises a multiple filter unit including multiple coils having a closed loop shape and multiple capacitors connected to the multiple coils, respectively. The method of claim 1,
Wherein the filter portion is formed by being enclosed or embedded in the peripheral portion located within a predetermined distance from the wireless charging device. The method of claim 1,
Wherein the filter unit is mounted at a position which forms an angle of 0 to 90 degrees with respect to a plane on which the wireless charging device is installed. The method of claim 1,
Wherein the filter portion is formed by being enclosed or embedded in an outer circumferential portion of an insulator case covered on a coil of the wireless charging device. The method of claim 1,
Wherein the filter portion is formed by being enclosed or embedded in an outer periphery of a non-slip pad on an insulator case of the wireless charging device. The method of claim 1,
Further comprising a controller for measuring the inductance of the coil and providing information for determining the size and shape of the closed loop of the coil based on the measured inductance of the coil. The method of claim 1,
Wherein the filter section further comprises a substrate for connecting both ends of the coil and the capacitor. The method of claim 1,
Wherein the filter unit further includes a pair of connectors connected to both ends of the plurality of wires when the coil is formed of a plurality of wires,
Wherein the capacitor is connected to any one of the plurality of wires connected to the pair of connectors. The method of claim 1,
Wherein the filter unit comprises: a pair of connectors connected to both ends of the plurality of wires when the coil is formed of a plurality of wires;
And a substrate for connecting the pair of connectors and the capacitor. The method of claim 1,
The coil is a conductor pattern corresponding to the coil,
Wherein the filter unit comprises: a flexible substrate including the conductor pattern;
And a substrate for connecting both ends of the conductor pattern and the capacitor. The method of claim 1,
The coil is a conductor pattern corresponding to the coil,
Wherein the filter unit includes: a flexible substrate including a conductive pattern and a pair of connector connection portions connected to both ends of the conductive pattern;
And a substrate for connecting the pair of connectors corresponding to the connector connection portion and the capacitor. The method of claim 1,
Wherein the filter portion is formed by enclosing or embedding a conductor pattern corresponding to the coil in the peripheral portion. In a vehicle equipped with a wireless charging device,
An automobile having a wireless charging device including the electromagnetic wave attenuating device for an automobile according to any one of claims 1 to 12.

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