KR20220090702A - Secondary evaluating apparatus and method for wireless charging system of electric vehicle - Google Patents

Abstract

Disclosed are a device for assisting evaluation of a wireless charging system for an electric vehicle and a method for assisting evaluation thereof. An auxiliary device for evaluation of a wireless charging system for an electric vehicle according to the present invention includes: a transmitting pad installed at a set height from a floor in a chamber and transmitting power wirelessly; a receiving pad for wirelessly receiving power transmitted by the transmitting pad; a receiving pad controller for controlling the direction and movement of the receiving pad with respect to the X-axis, Y-axis or Z-axis; an electromagnetic wave meter that measures electromagnetic waves from the side wall of the chamber; And based on the power value transmitted by the transmitting pad, the power value received by the receiving pad, the control value controlled by the receiving pad controller, and the electromagnetic wave measured by the electromagnetic wave measuring instrument to evaluate the performance and electromagnetic compatibility of the wireless charging It is characterized in that it includes a measuring instrument.

Description

Electric vehicle wireless charging system evaluation aid and its evaluation aid method

The present invention relates to an evaluation auxiliary device for an electric vehicle wireless charging system and an evaluation assistance method thereof, and more particularly, to an electric vehicle wireless charging system capable of simultaneously performing performance evaluation and electromagnetic compatibility evaluation for an electric vehicle wireless charging system. It relates to an evaluation aid device and an evaluation aid method thereof.

In general, an electric vehicle (EV) is a vehicle that uses electric energy charged from an electricity supply source as a power source, and is defined as one of environment-friendly vehicles along with a solar vehicle, a hybrid vehicle, and a fuel cell vehicle.

An electric vehicle includes an electric motor and a battery for supplying electricity to the motor. In other words, electric motors and batteries take the place of engines and fuels of general vehicles.

However, since the electric motor that operates the electric vehicle consumes excessive electric energy, the distance that can be driven by one charge is shorter than that of a general vehicle, and therefore, the battery installed in the electric vehicle must be periodically charged.

On the other hand, as a representative method for charging the battery of an electric vehicle, a plug-in method in which a charging cable is directly connected to an electric vehicle and directly charged, and magnetic induction generated by the primary and secondary coils are used. There is a wireless charging method.

Among them, the plug-in method has the inconvenience of having to insert a plug into the outlet of the electric vehicle every time it is charged, which is a big obstacle to the spread of electric vehicles.

In order to solve this problem, a wireless charging method that has been recently attempted uses magnetic induction to transmit power from a transmitting coil of a power supply buried in a road to a receiving coil installed on the floor of an electric vehicle.

On the other hand, in a wireless charging system of a general electric vehicle, the performance of wireless charging may vary depending on the manufacturer of the receiving coil, the manufactured receiving coil, and the like. Therefore, after evaluating the performance of wireless charging in general for the manufactured receiving coil, the receiving coil satisfying the performance is mounted in the electric vehicle.

However, the center point of the receiving coil may vary depending on the manufacturer, and for this reason, the tester visually checks and evaluates the alignment state of the transmitting coil and the receiving coil when evaluating wireless charging. However, when evaluating the performance of wireless charging by visually checking the alignment state of the transmitting coil and the receiving coil, a large error may occur, so there is a problem in that the reliability of the performance evaluation of the wireless charging system for an electric vehicle is lowered.

On the other hand, in the wireless charging system of a general electric vehicle, a large amount of electromagnetic waves are generated when power is transmitted by the transmitting coil. have. Therefore, it is necessary to evaluate the influence of electromagnetic waves leaking from the transmitting coil to the receiving coil in the electric vehicle wireless charging system.

Laid-Open Patent Publication No. 10-2019-0056083 (published date: May 24, 2019)

The present invention has been devised to solve the above problems and meet the needs, and an evaluation aid for an electric vehicle wireless charging system capable of simultaneously performing performance evaluation and electromagnetic compatibility evaluation for the electric vehicle wireless charging system and its evaluation assistance The purpose is to provide a method.

In accordance with one aspect of the present invention for achieving the above object, there is provided an evaluation auxiliary device for an electric vehicle wireless charging system, comprising: a transmitting pad installed at a set height from a floor in a chamber, and transmitting power wirelessly; a receiving pad for wirelessly receiving power transmitted by the transmitting pad; a receiving pad controller for controlling the direction and movement of the receiving pad with respect to the X-axis, Y-axis or Z-axis; an electromagnetic wave measuring device for measuring electromagnetic waves from the sidewall of the chamber; And the power value transmitted by the transmitting pad, the power value received by the receiving pad, the control value controlled by the receiving pad controller, and the performance and electromagnetic waves of wireless charging based on the electromagnetic waves measured by the electromagnetic wave meter It is characterized in that it includes; a measuring instrument that evaluates suitability.

The electric vehicle wireless charging system evaluation aid described above may further include a non-conductive frame installed vertically downward from the ceiling of the chamber and supporting the receiving pad.

Here, the receiving pad controller may include: a horizontal rotation controller for rotating the receiving pad in a horizontal direction; and a vertical rotation controller configured to rotate the receiving pad in a vertical direction.

In addition, the receiving pad controller may include: a horizontal movement controller for moving the receiving pad forward/rearward/left/right in a horizontal direction; and a vertical movement controller for vertically moving the receiving pad up and down.

The electric vehicle wireless charging system evaluation auxiliary apparatus described above may further include a non-conductive pad installed between the bottom surface of the chamber and the transmission pad.

Here, the measuring instrument may include a receiving pad display unit that displays the position of the receiving pad whose direction and movement are controlled by the receiving pad controller based on the position of the transmitting pad.

In addition, the measuring instrument, the efficiency calculation unit for calculating the efficiency of the power received by the receiving pad with respect to the power transmitted by the transmitting pad; further comprising, based on the calculated efficiency to evaluate the performance of wireless charging can

In addition, the measuring device, the first ratio calculator for calculating a first ratio of the electromagnetic wave measured by the electromagnetic wave measuring device to the power transmitted by the transmitting pad; and a second ratio calculator for calculating a second ratio of the electromagnetic wave measured by the electromagnetic wave measuring device to the power received by the receiving pad; further comprising, based on the calculated first ratio and the second ratio Thus, it is possible to evaluate the electromagnetic compatibility of wireless charging.

Here, the chamber preferably includes a conductor and an electromagnetic wave absorber.

A wireless charging evaluation assistance method according to an aspect of the present invention for achieving the above object is a wireless charging evaluation assistance method performed by a wireless charging evaluation assistance device of an electric vehicle, in which the transmission pad is set from the bottom surface in the chamber transmitting power wirelessly from a height; A receiving pad wirelessly receiving power transmitted by the transmitting pad; controlling the direction and movement of the receiving pad with respect to the X-axis, Y-axis or Z-axis; measuring electromagnetic waves at the sidewall of the chamber; And based on the power value transmitted by the transmitting pad, the power value received by the receiving pad, the control value of the direction and movement of the receiving pad, and the measured electromagnetic wave to evaluate the performance and electromagnetic compatibility of wireless charging step; characterized in that it includes.

Here, the step of controlling the direction and movement of the receiving pad may include rotating the receiving pad in a horizontal direction or a vertical direction.

In addition, the step of controlling the direction and movement of the receiving pad may include moving the receiving pad forward/rearward/left/right in a horizontal direction or vertically moving the receiving pad in a vertical direction.

In addition, the step of evaluating the performance and electromagnetic compatibility of the wireless charging, on the basis of the position of the transmitting pad, displaying the position of the receiving pad, the direction and movement of which is controlled by the receiving pad controller; can

In addition, the step of evaluating the performance and electromagnetic compatibility of the wireless charging, calculating the efficiency of the power received by the receiving pad with respect to the power transmitted by the transmitting pad; further comprising, in the calculated efficiency Based on this, the performance of wireless charging can be evaluated.

In addition, the step of evaluating the performance and electromagnetic compatibility of the wireless charging, calculating a first ratio of the electromagnetic wave measured by the electromagnetic wave measuring device to the power transmitted by the transmission pad; And calculating a second ratio of the electromagnetic wave measured by the electromagnetic wave measuring device with respect to the power received by the receiving pad; based on the calculated first ratio and the second ratio of the wireless charging Electromagnetic compatibility can be evaluated.

According to the present invention, it is possible to simultaneously perform performance evaluation and electromagnetic compatibility evaluation for an electric vehicle wireless charging system.

1 is a diagram schematically illustrating a configuration of an evaluation auxiliary device of a wireless charging system for an electric vehicle according to an embodiment of the present invention.
FIG. 2 is a diagram schematically illustrating the configuration of the receiving pad controller shown in FIG. 1 .
3 is a diagram illustrating the concept of horizontal rotation and vertical rotation by the receiver pad controller.
FIG. 4 is a diagram schematically illustrating the configuration of the measuring instrument shown in FIG. 1 .
5 is a flowchart illustrating an evaluation assistance method of an electric vehicle wireless charging system according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. In describing the reference numerals for the components of each drawing, the same components are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When a component is described as being “connected”, “coupled” or “connected” to another component, the component may be directly connected, coupled, or connected to the other component, but the component and the other component It should be understood that another element may be “connected”, “coupled” or “connected” between elements.

1 is a diagram schematically illustrating a configuration of an evaluation auxiliary device of a wireless charging system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 1 , the evaluation auxiliary apparatus 100 of the wireless charging system for an electric vehicle according to an embodiment of the present invention includes a transmitting pad 110 , a non-conductive pad 112 , a receiving pad 120 , and a non-conductive frame 122 . ), a receiving pad controller 130 , an electromagnetic wave measuring instrument 140 and a measuring instrument 150 .

The transmission pad 110 is installed at a set height from the floor in the chamber 10, and transmits power wirelessly. Here, the chamber 10 is a device provided with a space for evaluating a wireless charging system for an electric vehicle, and includes a conductor and an electromagnetic wave absorber, and completely absorbs sound or electromagnetic waves to prevent reflection of sound or electromagnetic waves. In this case, the electromagnetic wave absorber may be made of ferrite or the like. In addition, the chamber 10 may be configured to include a first space including a conductor and an electromagnetic wave absorber, and a second space formed of a non-conductive frame in the first space. In addition, the transmission pad 110 is a device including a transmission coil for wirelessly charging the battery for an electric vehicle, and wirelessly transmits a high-frequency current in the range of 20 kHz to 85 kHz.

The non-conductive pad 112 is made of a non-conductive material and is installed between the bottom surface of the chamber 10 and the transmission pad 110 . In this case, the non-conductive pad 112 is for the transmission pad 110 to be spaced 100 mm from the floor in order to evaluate the electromagnetic compatibility of the electric vehicle wireless charging system, and is preferably set to a thickness of 100 mm or more.

The receiving pad 120 includes a receiving coil, and wirelessly receives power transmitted by the transmitting pad 110 using a magnetic induction phenomenon. In this case, the receiving pad 120 may be supported in a horizontal direction with the transmitting pad 110 by the non-conductive frame 122 installed vertically downward from the ceiling of the chamber 10 . In this case, a steel plate, an aluminum plate, or the like may be installed between the receiving pad 120 and the non-conductive frame 122 .

The receiving pad controller 130 controls the direction and movement of the receiving pad 120 in the X-axis, Y-axis, or Z-axis direction. That is, the receiving pad controller 130 is configured such that the receiving pad 120 is parallel to the transmitting pad 110 , and the center of the receiving pad 120 is located on a vertical line of the center of the transmitting pad 110 . Controls the direction and movement of the X-axis, Y-axis, or Z-axis direction.

In this case, the receiving pad 130 may include a horizontal rotation controller 132 , a vertical rotation controller 134 , a horizontal movement controller 136 , and a vertical movement controller 138 as shown in FIG. 2 .

Here, the horizontal rotation controller 132 rotates the receiving pad 120 in the horizontal direction, and the vertical rotation controller 134 rotates the receiving pad 120 in the vertical direction. For example, the vertical rotation controller 134 controls the inclination of the surface formed by the Y-axis and the Z-axis of the receiving pad 120 through rotation in the vertical direction about the X-axis as shown in (a) of FIG. 3 . Alternatively, as shown in (b) of FIG. 3 , the inclination of the surface formed by the X-axis and the Z-axis of the receiving pad 120 may be adjusted through rotation in the vertical direction about the Y-axis. In addition, the horizontal rotation controller 132 may adjust the inclination of the surface formed by the X-axis and the Y-axis of the receiving pad 120 through rotation in the horizontal direction about the Z-axis as shown in (c) of FIG. 3 . have.

In addition, the horizontal movement controller 136 moves the receiving pad 120 forward/rearward/left and right in the horizontal direction, and the vertical movement controller 138 moves the receiving pad 120 up and down in the vertical direction. At this time, the horizontal movement controller 136 moves the support 122 supporting the receiving pad 120 forward/backward/left and right in the horizontal direction, or extends the support 122 extending in the vertical direction from the ceiling of the chamber 10 . By extending or shortening the length, the receiving pad 120 can be vertically moved up and down.

The electromagnetic wave measuring device 140 measures electromagnetic waves from the sidewall of the chamber 10 . That is, the electromagnetic wave measuring device 140 includes an antenna, and while power is wirelessly transmitted by the transmission pad 110 , the electromagnetic wave is measured by power leaking in the direction of the inner wall of the chamber 10 . This electromagnetic wave measurement is defined as electromagnetic radiation emission measurement.

In addition, the electromagnetic wave measuring device 140 may apply an electromagnetic wave to the inside of the chamber 10 and may measure whether the receiving pad 120 malfunctions. Such electromagnetic wave electromagnetic wave measurement is defined as electromagnetic wave radiation immunity measurement.

The measuring instrument 150 includes a power value transmitted by the transmitting pad 110 , a power value received by the receiving pad 120 , a control value controlled by the receiving pad controller 130 , and an electromagnetic wave measuring instrument 140 . Evaluate the performance and electromagnetic compatibility of wireless charging based on the measured electromagnetic waves.

At this time, the measuring instrument 150 corresponds to the power value transmitted by the transmitting pad 110 , and the receiving power value of the receiving pad 120 according to the position of the receiving pad 120 controlled by the receiving pad controller 130 . , and it is possible to determine the efficiency of the reception power of the reception pad 120 with respect to the transmission power of the transmission pad 110 at each location. In this case, the measuring instrument 150 may determine the performance of the wireless charging system for the electric vehicle according to whether the highest received power efficiency among the determined received power efficiencies is equal to or greater than a set value.

In addition, the measuring instrument 150 may determine the electromagnetic compatibility of the electric vehicle wireless charging system according to whether the measured value of the electromagnetic wave measured by the electromagnetic wave measuring device 140 is equal to or greater than a set value.

Meanwhile, as shown in FIG. 4 , the instrument 150 may include a receiving pad display unit 152 , an efficiency calculation unit 154 , a first ratio calculation unit 156 , and a second ratio calculation unit 158 . have.

The reception pad display unit 152 displays the position of the reception pad 120 whose direction and movement are controlled by the reception pad controller 130 based on the position of the transmission pad 110 . At this time, the position of the transmitting pad 110 is fixed, the receiving pad display unit 152 is a control angle in the horizontal direction controlled by the receiving pad controller 130 based on the fixed position of the transmitting pad 110, The position of the receiving pad 120 according to the control angle in the vertical direction, the movement distance in the horizontal direction, the movement distance in the vertical direction, etc. may be displayed on the screen. In this case, the reception pad display unit 152 displays values such as a horizontal control angle, a vertical control angle, a horizontal movement distance, and a vertical movement distance controlled by the reception pad controller 130 together. it is preferable

The efficiency calculator 154 calculates the efficiency of power received by the receiving pad 120 with respect to the power transmitted by the transmitting pad 110 . At this time, the efficiency calculator 154 calculates the efficiency of the reception power corresponding to the position of the reception pad 120 in response to the direction and movement of the reception pad 120 controlled by the reception pad controller 130 . . In this case, the measuring instrument 150 may determine the performance of wireless charging according to whether the highest reception power efficiency among the reception power efficiencies at each position of the receiving pad 120 is equal to or greater than a set value. In this case, it is preferable that the efficiency calculator 154 calculates a ratio of the transmitted power to the received power for a specific single frequency.

The first efficiency calculator 156 calculates a first ratio of the electromagnetic wave measured by the electromagnetic wave measuring device 140 to the power transmitted by the transmitting pad 110 . That is, the first efficiency calculator 156 calculates a ratio of electromagnetic waves due to leaked power to wireless power transmitted by the transmission pad 110 .

The second efficiency calculator 158 calculates a second ratio of the electromagnetic wave measured by the electromagnetic wave measuring device 140 to the power received by the receiving pad 120 . That is, the second efficiency calculator 158 calculates a ratio of electromagnetic waves due to leaked power to power received by the receiving pad 120 .

Here, it is preferable that the first efficiency calculation unit 156 and the second efficiency calculation unit 158 calculate the first ratio and the second ratio, respectively, based on values measured at the same time and under the same conditions.

In this case, the meter 150 may evaluate the electromagnetic compatibility of wireless charging based on the first ratio calculated by the first efficiency calculation unit 156 and the second ratio calculated by the second efficiency calculation unit 158 . have. That is, the measuring instrument 150 evaluates the electromagnetic wave suitability of wireless charging according to the ratio of the electromagnetic wave due to the leaked power to the transmitted power and the ratio of the electromagnetic wave due to the leaked power to the efficiency of the receiving power of the receiving pad 120 . have.

Meanwhile, the evaluation of electromagnetic compatibility may be performed by extending the frequency range to a frequency band within the range of 150 kHz to 2.5 GHz instead of being made based on the charging efficiency at a specific single frequency. In this case, it is preferable that the first efficiency calculation unit 156 and the second efficiency calculation unit 158 are omitted.

In addition, the measuring instrument 150 may evaluate the performance of the wireless charging system according to the ratio of the electromagnetic wave due to the leaked power to the power transmitted by the transmission pad 110 .

5 is a flowchart illustrating an evaluation assistance method of an electric vehicle wireless charging system according to an embodiment of the present invention. The evaluation assistance method of the electric vehicle wireless charging system according to the embodiment of the present invention may be performed by the evaluation assistance apparatus 100 of the electric vehicle wireless charging system shown in FIG. 1 .

1 to 5 , the transmission pad 110 is installed at a set height from the floor in the chamber 10, and transmits power wirelessly (S102). Here, the chamber 10 is a device provided with a space for evaluating a wireless charging system for an electric vehicle, and includes a conductor and an electromagnetic wave absorber, and completely absorbs sound or electromagnetic waves to prevent reflection of sound or electromagnetic waves. In this case, the electromagnetic wave absorber may be made of ferrite or the like. In addition, the chamber 10 may be configured to include a first space including a conductor and an electromagnetic wave absorber, and a second space formed of a non-conductive frame in the first space. In addition, the transmission pad 110 is a device including a transmission coil for wirelessly charging the battery for an electric vehicle, and wirelessly transmits a high-frequency current in the range of 20 kHz to 85 kHz.

The receiving pad 120 includes a receiving coil, and wirelessly receives power transmitted by the transmitting pad 110 using a magnetic induction phenomenon (S104). In this case, the receiving pad 120 may be supported in a horizontal direction with the transmitting pad 110 by the non-conductive frame 122 installed vertically downward from the ceiling of the chamber 10 . In this case, a steel plate, an aluminum plate, or the like may be installed between the receiving pad 120 and the non-conductive frame 122 .

The receiving pad controller 130 controls the direction and movement of the receiving pad 120 in the X-axis, Y-axis or Z-axis direction (S106). That is, the receiving pad controller 130 is configured such that the receiving pad 120 is parallel to the transmitting pad 110 , and the center of the receiving pad 120 is located on a vertical line of the center of the transmitting pad 110 . Controls the direction and movement of the X-axis, Y-axis, or Z-axis direction.

In this case, the receiving pad controller 130 may rotate the receiving pad 120 in a horizontal direction or may rotate the receiving pad 120 in a vertical direction. For example, the receiving pad controller 130 adjusts the inclination of the surface formed by the Y axis and the Z axis of the receiving pad 120 through rotation in the vertical direction about the X axis, or in the vertical direction about the Y axis. Through rotation, the inclination of the surface formed by the X-axis and the Z-axis of the receiving pad 120 can be adjusted. In addition, the receiving pad controller 130 may adjust the inclination of the surface formed by the X axis and the Y axis of the receiving pad 120 through horizontal rotation about the Z axis.

In addition, the receiving pad controller 130 may move the receiving pad 120 forward/rearward/left/right in the horizontal direction or vertically move the receiving pad 120 in the vertical direction. At this time, the receiving pad controller 130 moves the support 122 supporting the receiving pad 120 back and forth/left and right in the horizontal direction, or extends the support 122 extending in the vertical direction from the ceiling of the chamber 10 . By extending or shortening the length, the receiving pad 120 can be vertically moved up and down.

The electromagnetic wave measuring device 140 measures electromagnetic waves from the sidewall of the chamber 10 (S108). That is, the electromagnetic wave measuring device 140 includes an antenna, and while power is wirelessly transmitted by the transmission pad 110 , the electromagnetic wave is measured by power leaking in the direction of the inner wall of the chamber 10 .

The measuring instrument 150 includes a power value transmitted by the transmitting pad 110 , a power value received by the receiving pad 120 , a control value controlled by the receiving pad controller 130 , and an electromagnetic wave measuring instrument 140 . Evaluate the performance and electromagnetic compatibility of wireless charging based on the measured electromagnetic waves.

At this time, the measuring instrument 150 corresponds to the power value transmitted by the transmitting pad 110 , and the receiving power value of the receiving pad 120 according to the position of the receiving pad 120 controlled by the receiving pad controller 130 . , and it is possible to determine the efficiency of the reception power of the reception pad 120 with respect to the transmission power of the transmission pad 110 at each location. In this case, the measuring instrument 150 may determine the performance of the wireless charging system for the electric vehicle according to whether the highest received power efficiency among the determined received power efficiencies is equal to or greater than a set value.

In addition, the measuring instrument 150 may determine the electromagnetic compatibility of the electric vehicle wireless charging system according to whether the measured value of the electromagnetic wave measured by the electromagnetic wave measuring device 140 is equal to or greater than a set value.

Here, the measuring instrument 150 displays the position of the receiving pad 120 whose direction and movement are controlled by the receiving pad controller 130 based on the position of the transmitting pad 110 (S110). At this time, the position of the transmitting pad 110 is fixed, and the measuring instrument 150 is controlled by the receiving pad controller 130 on the basis of the fixed position of the transmitting pad 110, the control angle in the horizontal direction, the vertical direction The position of the receiving pad 120 according to the control angle, horizontal movement distance, vertical movement distance, etc. may be displayed on the screen. In this case, the measuring instrument 150 preferably displays values such as a horizontal control angle, a vertical control angle, a horizontal movement distance, and a vertical movement distance controlled by the receiving pad controller 130 together. do.

The measuring instrument 150 calculates the efficiency of the power received by the receiving pad 120 with respect to the power transmitted by the transmitting pad 110 (S112). At this time, in response to the direction and movement of the receiving pad 120 controlled by the receiving pad controller 130 , the measuring instrument 150 calculates the efficiency of the receiving power corresponding to the position of the corresponding receiving pad 120 . In this case, the measuring instrument 150 may determine the performance of wireless charging according to whether the highest reception power efficiency among the reception power efficiencies at each position of the receiving pad 120 is equal to or greater than a set value. In this case, it is preferable that the measuring instrument 150 calculates the ratio of the transmitted power to the received power for a specific single frequency.

In addition, the measuring instrument 150 calculates a first ratio of the electromagnetic wave measured by the electromagnetic wave measuring device 140 to the power transmitted by the transmitting pad 110 (S114). That is, the measuring instrument 150 calculates the ratio of the electromagnetic wave due to the leaked power to the wireless power transmitted by the transmission pad 110 .

In addition, the measuring device 150 calculates a second ratio of the electromagnetic wave measured by the electromagnetic wave measuring device 140 to the power received by the receiving pad 120 . That is, the measuring instrument 150 calculates the ratio of the electromagnetic wave due to the leaked power to the power received by the receiving pad 120 . Here, it is preferable that the measuring instrument 150 calculates the first ratio and the second ratio, respectively, based on values measured at the same time and under the same conditions.

In this case, the measuring instrument 150 may evaluate the electromagnetic compatibility of the wireless charging based on the calculated first ratio and the calculated second ratio (S116). That is, the measuring instrument 150 evaluates the electromagnetic wave suitability of wireless charging according to the ratio of the electromagnetic wave due to the leaked power to the transmitted power and the ratio of the electromagnetic wave due to the leaked power to the efficiency of the receiving power of the receiving pad 120 . have.

Meanwhile, the evaluation of electromagnetic compatibility may be performed by extending the frequency range to a frequency band within the range of 150 kHz to 2.5 GHz instead of being made based on the charging efficiency at a specific single frequency. In this case, the measuring instrument 150 may omit the calculation of the first ratio and the second ratio.

In addition, the measuring instrument 150 may evaluate the performance of the wireless charging system according to the ratio of the electromagnetic wave due to the leaked power to the power transmitted by the transmission pad 110 .

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent ranges of embodiments are possible therefrom. Accordingly, the protection scope of the present invention should be defined by the following claims as well as their equivalents.

Claims (15)

a transmitting pad installed at a set height from the floor in the chamber and transmitting power wirelessly;
a receiving pad for wirelessly receiving power transmitted by the transmitting pad;
a receiving pad controller for controlling the direction and movement of the receiving pad with respect to the X-axis, Y-axis or Z-axis;
an electromagnetic wave measuring device for measuring electromagnetic waves from the sidewall of the chamber; and
Performance and electromagnetic compatibility of wireless charging based on the power value transmitted by the transmitting pad, the power value received by the receiving pad, the control value controlled by the receiving pad controller, and the electromagnetic wave measured by the electromagnetic wave meter measuring instruments;
Evaluation auxiliary device of the electric vehicle wireless charging system, characterized in that it comprises a. According to claim 1,
a non-conductive frame installed vertically downward from the ceiling of the chamber and supporting the receiving pad;
Evaluation auxiliary device of the electric vehicle wireless charging system, characterized in that it further comprises. According to claim 1,
The receiving pad controller,
a horizontal rotation controller for rotating the receiving pad in a horizontal direction; and
a vertical rotation controller for rotating the receiving pad in a vertical direction;
Evaluation auxiliary device of the electric vehicle wireless charging system, characterized in that it comprises a. According to claim 1,
The receiving pad controller,
a horizontal movement controller for moving the receiving pad forward/backward/left/right in a horizontal direction; and
a vertical movement controller for vertically moving the receiving pad up and down;
Evaluation auxiliary device of the electric vehicle wireless charging system, characterized in that it comprises a. According to claim 1,
a non-conductive pad installed between the bottom surface of the chamber and the transmission pad;
Evaluation auxiliary device of the electric vehicle wireless charging system, characterized in that it further comprises. According to claim 1,
The meter is
a receiving pad display unit for displaying the position of the receiving pad whose direction and movement are controlled by the receiving pad controller based on the position of the transmitting pad;
Evaluation auxiliary device of the electric vehicle wireless charging system, characterized in that it comprises a. According to claim 1,
The meter is
an efficiency calculator for calculating the efficiency of power received by the receiving pad with respect to the power transmitted by the transmitting pad;
includes,
Evaluation auxiliary device for an electric vehicle wireless charging system, characterized in that it evaluates the performance of wireless charging based on the calculated efficiency. 8. The method of claim 7,
The meter is
a first ratio calculator for calculating a first ratio of the electromagnetic wave measured by the electromagnetic wave measuring device to the power transmitted by the transmitting pad; and
a second ratio calculator for calculating a second ratio of the electromagnetic wave measured by the electromagnetic wave measuring device to the power received by the receiving pad;
further comprising,
Evaluation auxiliary device for an electric vehicle wireless charging system, characterized in that it evaluates electromagnetic compatibility of wireless charging based on the calculated first ratio and the second ratio. According to claim 1,
The chamber is an electric vehicle wireless charging system evaluation auxiliary device, characterized in that it includes a conductor and an electromagnetic wave absorber. In the wireless charging evaluation auxiliary method performed by the wireless charging evaluation auxiliary device of an electric vehicle,
Transmitting power wirelessly at a height set from the floor in the chamber by the transmission pad;
A receiving pad wirelessly receiving power transmitted by the transmitting pad;
controlling the direction and movement of the receiving pad with respect to the X-axis, Y-axis or Z-axis;
measuring electromagnetic waves at the sidewall of the chamber; and
Evaluating the performance and electromagnetic compatibility of wireless charging based on the power value transmitted by the transmitting pad, the power value received by the receiving pad, the control value of the direction and movement of the receiving pad, and the measured electromagnetic wave ;
Evaluation assistance method of the electric vehicle wireless charging system, characterized in that it comprises a. 11. The method of claim 10,
The step of controlling the direction and movement of the receiving pad,
An evaluation assistance method for an electric vehicle wireless charging system, characterized in that rotating the receiving pad in a horizontal direction or a vertical direction. 11. The method of claim 10,
The step of controlling the direction and movement of the receiving pad,
An evaluation assistance method for an electric vehicle wireless charging system, characterized in that the receiving pad is moved forward/rearward/left and right in the horizontal direction or the receiving pad is vertically moved in the vertical direction. 11. The method of claim 10,
The step of evaluating the performance and electromagnetic compatibility of the wireless charging is,
displaying the position of the receiving pad whose direction and movement are controlled by the receiving pad controller based on the position of the transmitting pad;
Evaluation assistance method of the electric vehicle wireless charging system, characterized in that it comprises a. 11. The method of claim 10,
The step of evaluating the performance and electromagnetic compatibility of the wireless charging is,
calculating the efficiency of power received by the receiving pad with respect to the power transmitted by the transmitting pad;
includes,
An evaluation assistance method for an electric vehicle wireless charging system, characterized in that it evaluates the performance of wireless charging based on the calculated efficiency. 15. The method of claim 14,
The step of evaluating the performance and electromagnetic compatibility of the wireless charging is,
calculating a first ratio of the electromagnetic wave measured by the electromagnetic wave measuring device to the power transmitted by the transmitting pad; and
calculating a second ratio of the electromagnetic wave measured by the electromagnetic wave measuring device to the power received by the receiving pad;
further comprising,
An evaluation assistance method for an electric vehicle wireless charging system, characterized in that the electromagnetic compatibility of wireless charging is evaluated based on the calculated first ratio and the second ratio.

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