KR102283666B1 - wireless charging device for auto tuning type of circuit variable, and auto tuning method of circuit variable using the same - Google Patents

Abstract

The present invention is a technology for maximizing power transmission from a primary side to a secondary side by changing a circuit variable of a primary side ground power feeding device in response to a changed circuit variable of a secondary side vehicle power collecting device. With respect to the pad, the primary side's circuit variables (eg resonance frequency, voltage) correspond to the secondary side's changed circuit variables (eg resonance frequency, voltage) due to various position changes (eg, vertical position change, horizontal position change) of the RX pad of the vehicle's current collector. : It is about a technology that can take over the maximum power from the secondary side vehicle current collector by changing the frequency, current) as well as generate a constant voltage. According to the present invention, since the first switch member and the second switch member capable of on-off operation are provided in the closed circuit member of the secondary side, there is an advantage in that the change of the inductance-related circuit variable can be easily measured.

Description

Circuit variable automatic tuning type wireless charging system and automatic tuning method of circuit variable using same {wireless charging device for auto tuning type of circuit variable, and auto tuning method of circuit variable using the same}

The present invention relates to a technique for maximizing power transmission from a primary side to a secondary side by changing a circuit variable of a ground power feeding device that is a primary side in response to a changed circuit parameter of a vehicle power collector that is a secondary side.

More specifically, the present invention relates to a circuit variable (eg, resonant frequency) on the secondary side due to various position changes (eg, vertical position change, horizontal position change) of the RX pad of the vehicle current collector with respect to the TX pad of the ground power supply device. , voltage) by changing the circuit variables (eg, frequency, current) on the primary side, as a result, it is possible to take over the maximum power from the vehicle current collector, which is the secondary side, as well as to create a constant voltage. it's about

[FIG. 1] is a block diagram showing a general vehicle current collector and a ground power feeding device, and [FIG. 2] is an exemplary diagram showing [FIG. 1] as a circuit diagram.

1 and 2, the vehicle receives power in a contactless type from the ground power feeder 20 installed on the floor through the vehicle power collector 10 installed therein and performs charging. .

To this end, the ground power feeding device 20 may include a high frequency inverter member 21 , a power feeding closed circuit member 22 , a power feeding capacitor member 23 , and a TX pad 20a to constitute a primary side.

Here, the high frequency inverter member 21 receives an alternating current (eg _{, AC220V rms} , 50 to 60Hz) _{from the outside and flows a high frequency current (i ref} = i ₁ ) to the TX pad 20a. In this case, the LC resonance part of the primary side is formed through the inductance component (L ₁ ) of the power feeding closed circuit member 22 and the power feeding capacitor member 23 .

In addition, the vehicle current collector 10 may include a current collector closed circuit member 11 , a current collector capacitor member 12 , an RX pad 10a , a regulator 10b , and a battery 10c to form a secondary side.

Here, the RX pad 10a is configured to induce a voltage from a magnetic field generated by a high-frequency current from the TX pad 20a.

The regulator 10b is configured to control the secondary-side LC resonator and the charging current of the battery 10c to extract maximum power from the magnetic field generated by the high-frequency current on the primary side.

In this case, the LC resonance part of the secondary side is formed through the inductance component L ₂ of the current collecting closed circuit member 11 and the current collecting capacitor member 12 .

)와 2차측의 공진주파수(

)가 동일하게 유지된다면 1차측으로부터 2차측으로의 전력 전달은 최대로 이루어질 수 있을 것이다.However, as in [Fig. 2], the resonance frequency (

) and the resonance frequency of the secondary side (

) remains the same, the power transfer from the primary side to the secondary side will be maximized.

However, in the actual field, it is difficult for the driver to ideally accurately position the RX pad 10a of the vehicle relative to the TX pad 20a of the ground power feeder 20 in order to charge the battery 10c of the vehicle, and also It is also impossible for the RX pad 10a of the vehicle to always be positioned at the same height when viewed with respect to the TX pad 20a of the ground power feeder 20 despite various vehicle types.

For example, [Fig. 3] is an exemplary diagram briefly showing the relative position change between the TX pad provided in the ground power supply device and the RX pad provided in the vehicle power collector, and [Fig. 4] is the position change in [Fig. 3]. It is an exemplary diagram showing a process in which self-inductance and mutual inductance are varied in the circuit diagram of FIG.

When the relative position of the RX pad 10a with respect to the TX pad 20a of the ground feeding device 20 is changed as in (a) or (b) of [FIG. 3], the feed as in [FIG. 4] The self-inductance, which is the inductance component (L ₁ ) of the closed circuit member 22, and the self-inductance, which is the inductance component (L ₂ ) of the current collecting closed circuit member 11, change, and the mutual inductance between the TX pad 20a and the RX pad 10a ( M) also changes.

)와 2차측의 공진주파수(

)가 서로 다르게 변하게 되어 1차측으로부터 2차측으로의 전력 전달이 감소하는 문제점이 발생한다.In this way, power is transferred from the primary side to the secondary side by using LC resonance. As each self-inductance ((L ₁ , L ₂ ), which is a system variable on the primary side and the secondary side, changes, the resonance frequency (

) and the resonance frequency of the secondary side (

) is changed differently, resulting in a decrease in power transfer from the primary side to the secondary side.

Also, as the mutual inductance M between the TX pad 20a and the RX pad 10a changes, the voltage induced in the secondary RX pad 10a also changes.

In this case, since the secondary-side current collecting capacitor member 12 is a passive element, since resonance is previously set, there is a problem in that it cannot be actively changed in response to changes in the _{inductances L 1} , L _{2 , M.}

Accordingly, at the point in time when LC resonance occurs with the vehicle stopped with respect to the ground power feeding device 20, the self-inductance of the primary side (L ₁ ), the self-inductance of the secondary side (L ₂ ), as shown in FIG. 4 , By measuring the mutual inductance (M) to find out the change in the circuit variables (resonant frequency, voltage) for the secondary side, and by changing the circuit variables (frequency, current) for the primary side in response to the found circuit variable value It is required to implement a technology capable of solving the problems of the prior art.

The present invention has been proposed in view of the above, and an object of the present invention _{is to measure the self-inductance (L 1} ) of the primary side, the self-inductance (L ₂ ) of the secondary side, and the mutual inductance (M) for the secondary side. A circuit capable of transmitting maximum power from the primary side to the secondary side by finding out changes in circuit variables (resonant frequency, voltage) and changing the circuit variables (frequency, current) for the primary side in response to the found circuit variable values An object of the present invention is to provide a variable automatic tuning type wireless charging system and an automatic tuning method of circuit variables using the same.

In order to achieve the above object, the present invention provides a circuit variable auto-tuning type wireless charging system comprising a ground power feeding device installed on the ground and a vehicle power collecting device installed in a vehicle and receiving power from the ground power feeding device in a contactless type, The vehicle current collector 100 includes: a secondary-side electromagnetic induction means 110 in which an electromagnetic field is induced in a contactless type through a high-frequency current flowing in a primary side; Inductance detection means 120 for detecting self-inductance and mutual inductance; provided, and the ground power feeding device 200 receives an alternating current from the outside and flows a high-frequency current as a primary side, thereby applying an electromagnetic field to the secondary side electromagnetic induction means. a primary-side high-frequency generating means 210 for inducing; frequency setting means 220 for changing the driving frequency of the high-frequency current based on the self-inductance detected by the inductance detecting means so as to be a nominal inductance value set separately for the self-inductance and the mutual inductance in advance; and current setting means 230 for changing the amount of the high-frequency current based on the mutual inductance detected by the inductance detecting means so as to be a nominal inductance value set separately for the self inductance and the mutual inductance in advance.

Here, the secondary side electromagnetic induction means 110 according to the first embodiment of the present invention is connected to the battery of the vehicle so that the electromagnetic field is induced in a contactless type through alternating current flowing through the primary high frequency generating means to form an RX pad, a current collecting closed circuit member 111 representing an inductance component with respect to alternating current; a current collecting capacitor member 112 connected in series to the current collecting closed circuit member and resonating with an inductance component of the current collecting closed circuit member; a first switch member 113 switched on and off while connected in parallel with the current collecting capacitor member as one end thereof is bridged to the current collecting closed circuit member; A second switch member 114 connected in series with the current collecting capacitor member and switched on and off while connected in parallel with the first switch member as it is bridged to the current collecting closed circuit member corresponding between the current collecting capacitor member and the first switch member; can do.

At this time, the primary-side high-frequency generating means 210 according to the first embodiment of the present invention is a high-frequency inverter that receives an alternating current from the outside and induces an electromagnetic field in the current collecting closed circuit member in a contactless type by flowing a high-frequency current as the primary side. member 211; a power feeding closed circuit member 212 connected to the high frequency inverter member to form a TX pad and representing an inductance component with respect to alternating current; A power feeding capacitor member 213 connected in series to the power feeding closed circuit member and resonating with the inductance component of the power feeding closed circuit member may be provided.

And, the secondary-side electromagnetic induction means 110 according to the second embodiment of the present invention is connected to the battery of the vehicle so that the electromagnetic field is induced in a contactless type through alternating current flowing through the primary-side high-frequency generating means to form an RX pad, a current collecting closed circuit member 111' representing an inductance component with respect to alternating current; a first current collecting capacitor member 112a connected in series to the current collecting closed circuit member and resonating with an inductance component of the current collecting closed circuit member; a second current collecting capacitor member 112b connected in series to a current collecting closed circuit member adjacent to the first current collecting capacitor member and resonating with an inductance component of the current collecting closed circuit member; a first switch member 113 ′ switched on and off while being connected in parallel with the first current collecting capacitor member as the bridge is connected to the current collecting closed circuit member; A second switch member 114 ′ is switched on and off while being connected in parallel with respect to the first current collecting capacitor member and the second current collecting capacitor member by being bridged to the current collecting closed circuit member between the first current collecting capacitor member and the second current collecting capacitor member ; can be provided.

At this time, the primary-side high-frequency generating means 210 according to the second embodiment of the present invention is a high-frequency inverter for inducing an electromagnetic field in the current collecting closed circuit member in a contactless type according to the flow of high-frequency current as the primary side by receiving alternating current from the outside. member 211'; a power feeding closed circuit member 212' connected to the high frequency inverter member to form a TX pad and representing an inductance component with respect to alternating current; and a power feeding capacitor member 213 ′ connected in series to the power feeding closed circuit member and resonating with the inductance component of the feeding closed circuit member.

On the other hand, the present invention is an automatic tuning method of circuit variables using the circuit variable automatic tuning type wireless charging system for a circuit variable automatic tuning type wireless charging system having a vehicle power collector 100 and a ground power feeding device 200, (a) the ground power feeding device 200 receives an alternating current from the outside and flows a high-frequency current as a primary side; (b) inducing, by the vehicle current collector 100, an electromagnetic field in a contactless type through a high-frequency current flowing in the primary side; (c) detecting, by the vehicle current collector 100, self-inductance and mutual inductance; (d) changing the driving frequency of the high frequency current based on the self-inductance detected by the vehicle current collector so that the ground power feeder 200 becomes a nominal inductance value set separately for the self-inductance and the mutual inductance in advance; (e) changing the amount of high-frequency current based on the mutual inductance detected by the vehicle current collector so that the ground power feeder 200 becomes a nominal inductance value set separately for self-inductance and mutual inductance in advance; including; can be configured.

On the other hand, the computer program according to the present invention is stored in the medium in order to execute the automatic tuning method of circuit variables using the circuit variable automatic tuning type wireless charging system as described above in combination with hardware.

The present invention is provided with an inductance detection means _{to measure the circuit variables corresponding to the primary-side self-inductance (L 1} ), the secondary-side self-inductance (L ₂ ), and the mutual inductance (M), and frequency setting means, current setting As the means is provided, the maximum power transfer from the primary side to the secondary side is possible by changing the circuit variables (frequency, amount of current) of the primary side in response to the measured circuit variables.

In addition, the present invention shows the advantage of being able to easily measure changes in inductance-related circuit variables by providing the first switch member and the second switch member capable of on-off operation on the secondary side current collecting closed circuit member.

[Figure 1] is a block diagram showing a general vehicle current collector and a ground power supply device;
[FIG. 2] is an exemplary diagram showing [FIG. 1] as a circuit diagram,
[FIG. 3] is an exemplary view briefly showing the relative position change between the TX pad provided in the ground power feeding device and the RX pad provided in the vehicle power collector;
[FIG. 4] is an exemplary diagram showing a process in which self-inductance and mutual inductance are varied in the circuit diagram of [FIG. 2] in response to a change in position in [FIG. 3];
[Figure 5] is a circuit diagram schematically showing a circuit variable automatic tuning type wireless charging system according to a first embodiment of the present invention;
[Figure 6] is a circuit diagram showing a process in which the high-frequency inverter member flows a high-frequency current corresponding to the driving frequency changed by the frequency setting means and the amount of current changed by the current setting means in the present invention;
[Figure 7] is a circuit diagram schematically showing a circuit variable automatic tuning type wireless charging system according to a second embodiment of the present invention;
[FIG. 8] is a circuit diagram showing the switching on/off state of the first switch member and the second switch member by extracting the current collector closed circuit member portion on [FIG. 7];
[Fig. 9] is a flowchart showing the automatic tuning process of circuit variables using the circuit variable automatic tuning type wireless charging system according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

[Fig. 5] is a circuit diagram schematically showing a circuit variable automatic tuning type wireless charging system according to a first embodiment of the present invention, and [Fig. 6] is a driving frequency in which the high frequency inverter member in the present invention is changed by the frequency setting means. It is a circuit diagram showing the process of flowing a high-frequency current corresponding to the amount of current changed by the eddy current setting means.

Referring to [Fig. 5] and [Fig. 6], the first embodiment of the present invention is a ground power feeding device 200 as a primary side installed on the ground and installed in a vehicle to supply power from the ground power feeding device in a contactless type. A circuit variable auto-tuning type wireless charging system having a vehicle current collector 100 as a receiving secondary side, wherein the vehicle current collector 100 includes a secondary side electromagnetic induction means 110 and an inductance detection means 120, and The power feeding device 200 may include a primary-side high frequency generating unit 210 , a frequency setting unit 220 , and a current setting unit 230 .

First, the secondary-side electromagnetic induction means 110 induces an electromagnetic field in a contactless type through a high-frequency current flowing on the primary side. Specifically, the secondary-side electromagnetic induction means 110 induces a voltage in a contactless type from a magnetic field generated by a high-frequency current flowing by the high-frequency inverter member 211 on the primary side.

To this end, the secondary-side electromagnetic induction means 110 includes a current collecting closed circuit member 111, a current collecting capacitor member 112, a first switch member 113, and a second switch member 114 as shown in FIG. 5 . can do.

_{The current collecting closed circuit member 111 is a contactless type electromagnetic field through the alternating current (i 1} ) flowing in the power feeding closed circuit member 212 of the primary high frequency generating means 210 to induce the electromagnetic field of the vehicle as in [Fig. 5]. It is connected to the battery to form the RX pad 101 and exhibits an inductance component (L _{21 ) with respect to an alternating current (i 2 ).}

The current collecting capacitor member 112 is connected in series to the current collecting closed circuit member 111 as shown in FIG. 5 to resonate with _{the inductance component L 21 of the current collecting closed circuit member 111 .}

Here, since the current collecting capacitor member 112 is a passive device, since resonance is set in advance, the primary side self-inductance (L ₁ ), the secondary side self-inductance (L ₂ ), and the mutual inductance (M) change in FIG. 4 . cannot be actively changed in response to

As shown in FIG. 5 , as one end of the first switch member 113 is bridge-connected to the current collecting closed circuit member 111 , the first switch member 113 is switched on and off while connected in parallel with the current collecting capacitor member 112 .

The second switch member 114 is bridge-connected to the current collecting closed circuit member 111 between the current collecting capacitor member 112 and the first switch member 113 as shown in FIG. It is connected in series with the first switch member 113 and is switched on and off in a parallel connection state.

And, referring to FIG. 5 , the inductance detecting means 120 includes a mutual inductance M _{2 , a self-inductance L 21} , which is an inductance component of the current collecting closed circuit member 111 , and an inductance component of the power feeding closed circuit member 212 . Self-inductance (L ₁ ) can be detected.

인 주파수의 전류(i₁)를 흘리면 [도 5]에서와 같이

인 상호 인덕턴스(M2)를 구할 수 있다.For example, the inductance detection means 120 installs the first switch member 113 and the second switch member 114 as in [FIG. 5], and the first switch member 113 and the second switch member 114. In the state that all are turned off, the high frequency inverter member 211 on the primary side

When a current (i ₁ ) of a frequency of

The phosphorus mutual inductance (M2) can be obtained.

인 주파수의 전류(i₁)를 흘리면 [도 5]에서와 같이

인 집전 폐회로 부재(111)의 인덕턴스 성분으로서의 자기 인덕턴스(L₂₁)를 구할 수 있다.In addition, the inductance detecting means 120 installs the first switch member 113 and the second switch member 114 as in [FIG. 5], turns on the first switch member 113, and turns on the second switch member 114 ) is the high-frequency inverter member 211 of the primary side in the turned-off state

When a current (i ₁ ) of a frequency of

_{The self-inductance L 21} as an inductance component of the phosphorus current collecting closed circuit member 111 can be obtained.

On the other hand, the primary-side high-frequency generating means 210 receives an alternating current (eg, AC 220Vrms, 50/60 Hz) from the outside and flows the high-frequency current (i ₁ ) as the primary side, so the primary-side high-frequency generating means 210 is A magnetic field is generated so that a voltage is induced in the secondary electromagnetic induction means 110 .

To this end, the primary-side high frequency generating means 210 may include a high frequency inverter member 211 , a power feeding closed circuit member 212 , and a power feeding capacitor member 213 .

The high-frequency inverter member 211 receives an alternating current (eg, AC 220Vrms, 50/60 Hz) from the outside and flows the high-frequency current (i ₁ ) as the primary side to the power supply closed circuit member 212 as in [Fig. 5]. Accordingly, a voltage may be induced in the RX pad 101 of the current collecting closed circuit member 111 in a contactless type.

The power feeding closed circuit member 212 is connected to the high-frequency inverter member 211 as shown in FIG. 5 to form the TX pad 201 and represents the _{self-inductance (L 1} ), which is an inductance component with respect _{to the alternating current (i 1 ).}

The power feeding capacitor member 213 is connected in series to the power feeding closed circuit member 212 as shown in FIG. 5 to generate a predetermined resonant frequency while resonating with _{the inductance component L 21 of the feeding closed circuit member 212 .}

On the other hand, the frequency setting means 220 is configured such that the inductance detecting means 120 is a nominal inductance value set individually in advance for the _{self-inductances L 1} , L _{2 and the mutual inductance M as shown in FIG. 4 .} by changing the driving frequency of the high frequency current on the basis of the self-inductance (L ₂₁₎ on the detection of [5] the update frequency of the high-frequency current flowing through the high-frequency inverter element 211, as shown in [Fig. 6] [equation 1] can be implemented as

A current setting means 230 is a self inductance (L _1, L ₂₎ and the mutual inductance (M) inductance detecting means (120) such that the nominal inductance value in advance individually set for example, [4] Detection [ Based on the mutual inductance (M ₂ ) of Fig. 5], the amount of high-frequency current can be changed to [Equation 2] as in [Fig. 6].

In this way, the frequency setting means 220 changes the driving frequency of the high-frequency current based _{on the self-inductance L 21} on [Fig. 5] detected by the inductance detecting means 120, and the [ 5] on the _{basis of the mutual inductance M 2} , as the current setting means 230 operates the system by changing the amount of high-frequency current, a nominal resonance is always maintained in the RX pad 101 of the secondary side, and the RX The voltage induced in the pad 101 can always be obtained at the same value regardless of the relative position of the RX pad 101 with respect to the TX pad 201 .

[Fig. 7] is a circuit diagram schematically showing a circuit variable automatic tuning type wireless charging system according to a second embodiment of the present invention, and [Fig. 8] is a first switch by extracting a current collector closed circuit member on [Fig. It is a circuit diagram showing the switching on-off state of the member and the second switch member.

Referring to [Fig. 6] to [Fig. 8], in the second embodiment of the present invention, the ground power feeder 200 as a primary side installed on the ground and the ground power feeder installed in a vehicle supply power from the ground feeder in a contactless type. A circuit variable auto-tuning type wireless charging system having a vehicle current collector 100 as a receiving secondary side, wherein the vehicle current collector 100 includes a secondary side electromagnetic induction means 110 and an inductance detection means 120, and The power feeding device 200 may include a primary-side high frequency generating unit 210 , a frequency setting unit 220 , and a current setting unit 230 .

First, the secondary-side electromagnetic induction means 110 induces an electromagnetic field in a contactless type through a high-frequency current flowing on the primary side. Specifically, the secondary-side electromagnetic induction means 110 induces a voltage in a contactless type from a magnetic field generated by a high-frequency current flowing by the high-frequency inverter member 211 on the primary side.

To this end, the secondary-side electromagnetic induction means 110 includes a current collecting closed circuit member 111 ′, a first current collecting capacitor member 112a, a second current collecting capacitor member 112b, and a first switch member ( 113') and a second switch member 114'.

_{The current collecting closed circuit member 111 ′ is a contactless type electromagnetic field through the alternating current (i 1} ) flowing in the power feeding closed circuit member 212 ′ of the primary high frequency generating means 210, as in [Fig. 7] of the vehicle. It is connected to the battery to form an RX pad 101 ′ and exhibits an inductance component L _{21 for alternating current i 2 .}

The first current collecting capacitor member 112a is connected in series to the current collecting closed circuit member 111 ′ as shown in FIG. 7 to resonate with _{the inductance component L 21 of the current collecting closed circuit member 111 ′.}

The second current collecting capacitor member 112b is connected in series to the current collecting closed circuit member 111 ′ adjacent to the first current collecting capacitor member 112a as shown in FIG. 7 , and the inductance component ( L ₂₁ ) and resonant.

Here, the first current collecting capacitor member 112a and the second current collecting capacitor member 112b are passive elements, and since resonance is set in advance, the self-inductance L _{1 of the primary side and the self-inductance of the secondary side in [FIG. 4]} (L ₂ ), which cannot be actively changed in response to a change in mutual inductance (M).

Meanwhile, in the second embodiment of the present invention, the current collecting capacitor member is divided into a first current collecting capacitor member 112a and a second current collecting capacitor member 112b as shown in FIG. 7 .

_{Through this, in order to measure the current (i 2} ) flowing through the current collecting closed circuit member 111 ′, the current collecting closed circuit member during the on-off operation of the first switch member 113 ′ and the on-off operation of the second switch member 114 ′ is performed. _{Since the current (i 2} ) flowing in (111') can be lowered, it is advantageous for maintaining the durability of the system.

As shown in FIG. 7 , the first switch member 113 ′ is switched on and off while being connected in parallel with the first current collecting capacitor member 112a as the bridge is connected to the current collecting closed circuit member 111 ′.

The second switch member 114' is bridge-connected to the current collecting closed circuit member 111' between the first current collecting capacitor member 112a and the second current collecting capacitor member 112b as shown in FIG. The capacitor member 112a and the second current collecting capacitor member 112b are switched on and off in a parallel connection state.

And, referring to [Fig. 7] and [Fig. 8], the inductance detecting means 120 is a mutual inductance (M _{2 ), a self-inductance (L 21} ), which is an inductance component of the current collecting closed circuit member 111 ', a closed circuit member for feeding _{A self-inductance (L 1} ) that is an inductance component of (212') may be detected.

인 주파수의 전류(i₁)를 흘리면 [도 8]의 (a)에 나타낸

의 ①식을 검출할 수 있다.For example, the inductance detecting means 120 installs the first switch member 113 ′ and the second switch member 114 ′ as shown in [ FIG. 7 ] and the first switch as in (a) of FIG. 8 . In a state in which the member 113' is turned on and the second switch member 114' is turned off, the high frequency inverter member 211' on the primary side

When a current (i ₁ ) of a frequency

Equation ① of can be detected.

인 주파수의 전류(i₁)를 흘리면 인덕턴스 검출 수단(120)은 [도 8]의 (b)에 나타낸

의 ②식을 검출할 수 있다.And, in the state in which the first switch member 113' is turned off and the second switch member 114' is turned on, as in (b) of FIG. 8, the high frequency inverter member 211' of the primary side

_{When the current i 1} of the phosphorous frequency flows, the inductance detecting means 120 is shown in (b) of [Fig.

Expression ② can be detected.

_{Next, the inductance detecting means 120 detects the self-inductance (L 21} ), _{which is the inductance component of the mutual inductance (M 2} ) and the current collecting closed circuit member 111 ′, shown in (b) of FIG. 8 from the equations ① and ②. can do.

On the other hand, the primary high frequency generating means 210 in [Fig. 7] receives an alternating current (eg, AC 220Vrms, 50/60 Hz) from the outside and flows the high frequency current (i ₁ ) as the primary side to generate the primary high frequency The means 210 generates a magnetic field so that a voltage is induced in the secondary side electromagnetic induction means 110 .

To this end, the primary high frequency generating means 210 shown in FIG. 7 may include a high frequency inverter member 211 ′, a power feeding closed circuit member 212 ′, and a power feeding capacitor member 213 ′.

The high-frequency inverter member 211' receives an alternating current (eg, AC 220Vrms, 50/60 Hz) from the outside and supplies the high-frequency current (i ₁ ) as the primary side to the power feeding closed circuit member 212' as shown in FIG. 7 . A voltage may be induced in the RX pad 101 ′ of the current collecting closed circuit member 111 ′ in a contactless type according to the flow.

A self-inductance inductance component for feeding closed-circuit member (212 ') is a high-frequency drive member (211, as shown in [7], is connected to) TX pads 201' form a and ac (i ₁₎ (L ₁₎ indicates

The feeding capacitor member 213 ′ is connected in series to the power feeding closed circuit member 212 ′ as shown in FIG. 7 to generate a predetermined resonant frequency while resonating with _{the inductance component L 21 of the feeding closed circuit member 212 ′.} make it

On the other hand, the frequency setting means 220 is configured such that the inductance detecting means 120 is a nominal inductance value set individually in advance for the _{self-inductances L 1} , L _{2 and the mutual inductance M as shown in FIG. 4 .} by changing the driving frequency of the high frequency current on the basis of the self-inductance (L ₂₁₎ on the detection of [7] [6] the update frequency of the high-frequency current flowing through the high-frequency inverter element 211, as shown in the formula 3; can be implemented as

A current setting means 230 is a self inductance (L _1, L ₂₎ and the mutual inductance (M) inductance detecting means (120) such that the nominal inductance value in advance individually set for example, [4] Detection [ 7] on the _{basis of the mutual inductance (M 2} ), as in [Fig. 6], the amount of the high-frequency current can be changed to [Equation 4].

In this way, the frequency setting means 220 changes the driving frequency of the high-frequency current based _{on the self-inductance L 21} on [Fig. 7] detected by the inductance detecting means 120, and the [ 7] on the _{basis of the mutual inductance (M 2} ), as the current setting means 230 operates the system by changing the amount of high-frequency current, the nominal resonance is always maintained in the RX pad 101 ' of the secondary side, and its The voltage induced in the RX pad 101' may always be obtained with the same value regardless of the relative position of the RX pad 101' with respect to the TX pad 201'.

[Fig. 9] is a flowchart showing the automatic tuning process of circuit variables using the circuit variable automatic tuning type wireless charging system according to the present invention.

Step (S110): The present invention provides automatic tuning of circuit variables using the circuit variable automatic tuning type wireless charging system for a circuit variable automatic tuning type wireless charging system having a vehicle current collector 100 and a ground power feeding device 200 As a method, first, the ground power feeding device 200 receives an alternating current from the outside and flows a high frequency current as a primary side.

Step (S120): As in [Fig. 5] and [Fig. 7], from the high-frequency current flowing from the ground power supply 200 of the primary side, the vehicle current collector 100 of the secondary side is a contactless type RX pad 101, 101') to induce a voltage.

Step (S130): As in [Figs. 5] and [Fig. 7], the inductance detection means 120 provided in the vehicle current collector 100 on the secondary side provides the mutual inductance M ₂ and the current collector closed circuit members 111 and 111. '), which is the inductance component of the self-inductance L _{21 , and the self-inductance L 1} , which is the inductance component of the power feeding closed circuit members 212 and 212 ′.

Step (S140): As shown in [Fig. 4], the _{nominal inductance values set in advance for the self-inductances L 1 , L 2} and the mutual inductance M are provided in the ground-feeding device 200 of the primary side. The frequency setting means 220 determines the frequency of the high-frequency current based _{on the self-inductance L 21 in} Figs. 5 and 7 detected by the inductance detecting unit 120 provided in the vehicle current collector 100 on the secondary side. The driving frequency can be changed to [Equation 5] as in [Fig. 6].

Step (S150): As shown in [Fig. 4], the _{nominal inductance values set individually for the self-inductances L 1 , L 2} and the mutual inductance M are provided in the ground-feeding device 200 of the primary side. The current setting means 230 determines the amount of the high-frequency current as in [Fig. 6] based on the _{mutual inductance M 2} detected by the inductance detection means 120 provided in the vehicle current collector 100 on the secondary side [ It can be changed to Equation 6].

Meanwhile, the present invention can be implemented in the form of computer-readable codes on a computer-readable non-volatile recording medium. Various types of storage devices exist as such non-volatile recording media. For example, hard disks, SSDs, CD-ROMs, NAS, magnetic tapes, web disks, cloud disks, etc. A form in which it can be implemented and executed can also be implemented. In addition, the present invention may be implemented in the form of a computer program stored in a medium to execute a specific procedure in combination with hardware.

10: vehicle current collector
10a : RX Pad
10b: regulator
10c: battery
11: absence of current collection closed circuit
12: absence of current collecting capacitor
20: ground feeding device
20a : TX Pad
21: absence of high frequency inverter
22: absence of power supply closed circuit
23: absence of feeding capacitor
100: vehicle current collector
101, 101' : RX pad
110: secondary side electromagnetic induction means
111, 111': No current collector closed circuit
112: absence of current collecting capacitor
112a: first current collecting capacitor member
112b: second current collecting capacitor member
113, 113': first switch member
114, 114': second switch member
120: inductance detection means
200: ground feeding device
201, 201' : TX pad
210: primary side high frequency generating means
211, 211': No high-frequency inverter
212, 212': No power supply closed circuit
213, 213': Absence of feeding capacitor
220: frequency setting means
230: current setting means

Claims (5)

A circuit variable automatic tuning type wireless charging system comprising: a ground power supply installed on the ground; and a vehicle power collector installed in a vehicle and supplied with contactless type power from the ground power supply device, the wireless charging system comprising:
The vehicle current collector 100,
a secondary-side electromagnetic induction means 110 in which an electromagnetic field is induced in a contactless type through a high-frequency current flowing on the primary side;
inductance detecting means 120 for detecting self inductance and mutual inductance;
to provide
The ground feeding device 200,
Primary-side high-frequency generating means 210 for inducing an electromagnetic field in the secondary-side electromagnetic induction means as a high-frequency current flows as a primary side by receiving an alternating current from the outside;
frequency setting means (220) for changing the driving frequency of the high-frequency current based on the self-inductance detected by the inductance detecting means so as to be a nominal inductance value set separately for the self-inductance and the mutual inductance;
current setting means (230) for changing the amount of the high-frequency current based on the mutual inductance detected by the inductance detecting means so as to be a nominal inductance value set separately for the self-inductance and the mutual inductance;
Circuit variable automatic tuning type wireless charging system, characterized in that it comprises a.
The method according to claim 1,
The secondary side electromagnetic induction means 110,
a current collecting closed circuit member 111 connected to a battery of a vehicle to form an RX pad so as to induce an electromagnetic field in a contactless type through an alternating current flowing through the primary high frequency generating means and representing an inductance component with respect to alternating current;
a current collecting capacitor member 112 connected in series to the current collecting closed circuit member and resonating with an inductance component of the current collecting closed circuit member;
a first switch member 113 switched on and off while connected in parallel with the current collecting capacitor member as one end thereof is bridged to the current collecting closed circuit member;
A second switch member connected in series with the current collecting capacitor member and switched on and off while connected in parallel with the first switch member by being bridged to the current collecting closed circuit member corresponding between the current collecting capacitor member and the first switch member ( 114);
to provide
The primary side high frequency generating means 210,
a high-frequency inverter member 211 for inducing an electromagnetic field to the current collector closed circuit member in a contactless type by flowing a high-frequency current as a primary side by receiving an alternating current from the outside;
a power feeding closed circuit member 212 connected to the high frequency inverter member to form a TX pad and representing an inductance component with respect to alternating current;
a power feeding capacitor member 213 connected in series to the power feeding closed circuit member and resonating with an inductance component of the feeding closed circuit member;
Circuit variable automatic tuning type wireless charging system, characterized in that it comprises a.
The method according to claim 1,
The secondary side electromagnetic induction means 110,
a current collector closed circuit member (111') connected to a battery of a vehicle to form an RX pad so as to induce an electromagnetic field in a contactless type through an alternating current flowing through the primary high frequency generating means and representing an inductance component with respect to alternating current;
a first current collecting capacitor member 112a connected in series to the current collecting closed circuit member and resonating with an inductance component of the current collecting closed circuit member;
a second current collecting capacitor member (112b) connected in series to the current collecting closed circuit member adjacent to the first current collecting capacitor member and resonating with an inductance component of the current collecting closed circuit member;
a first switch member 113 ′ switched on and off while being connected to the first current collecting capacitor member in parallel with the first current collecting capacitor member as the bridge is connected to the current collecting closed circuit member;
A second switch switched on and off in a parallel connection state with respect to the first current collecting capacitor member and the second current collecting capacitor member as the bridge is connected to the current collecting closed circuit member between the first current collecting capacitor member and the second current collecting capacitor member member 114';
to provide
The primary side high frequency generating means 210,
a high-frequency inverter member (211') for inducing an electromagnetic field to the current collector closed circuit member in a contactless type by receiving an alternating current from the outside and flowing a high-frequency current as a primary side;
a power feeding closed circuit member (212') connected to the high frequency inverter member to form a TX pad and representing an inductance component with respect to alternating current;
a power feeding capacitor member 213' connected in series to the power feeding closed circuit member and resonating with an inductance component of the feeding closed circuit member;
Circuit variable automatic tuning type wireless charging system, characterized in that it comprises a.
An automatic tuning method of circuit variables using the automatic circuit variable automatic tuning wireless charging system for a circuit variable automatic tuning type wireless charging system having a vehicle current collector 100 and a ground power feeding device 200, the method comprising:
(a) the ground power feeding device 200 receives an alternating current from the outside and passes a high-frequency current as a primary side;
(b) inducing, by the vehicle current collector 100, an electromagnetic field in a contactless type through a high-frequency current flowing in the primary side;
(c) detecting, by the vehicle current collector 100, self-inductance and mutual inductance;
(d) the ground power feeder 200 changes the driving frequency of the high-frequency current based on the self-inductance detected by the vehicle current collector so as to be a nominal inductance value set individually for the self-inductance and the mutual inductance. to do;
(e) the ground power feeder 200 changes the amount of the high-frequency current based on the mutual inductance detected by the vehicle current collector so as to be a nominal inductance value set separately for the self-inductance and the mutual inductance. step;
Automatic tuning method of circuit variables using a circuit variable automatic tuning type wireless charging system comprising a.
A computer program stored in a medium in order to execute the automatic tuning method of circuit variables using the circuit variable automatic tuning type wireless charging system according to claim 4 in combination with hardware.

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