KR20120110927A - Apparatus and system for wireless power transmission using dual transmitter coils - Google Patents

Abstract

PURPOSE: A wireless power transmitting device and system are provided to guarantee transmission efficiency by arranging two transmission coil parts for wireless power electrical transmission. CONSTITUTION: A first transmission coil part(131) wirelessly transmits electricity provided from a power source to a receiving coil part. A first electricity coil is electrically connected to the power source and receives electricity from a power source. A first transmission resonator is magnetically connected to the first electricity coil. A second transmission coil part(132) is separately placed with the first transmission coil part and comprises a second transmission resonator. The first transmission resonator and the second transmission resonator transmit electricity to the receiving coil part by resonance of the receiving coil part.

Description

Apparatus and System for Wireless Power Transmission Using Dual Transmitter Coils}

The present invention relates to wireless power transmission, and more particularly, to wirelessly transmit power from a transmission unit including dual transmitter coils to a receiving unit including a receiving coil by using electromagnetic resonance, The present invention relates to an apparatus and system for efficiently transmitting power without sensitively changing power transmission efficiency according to a position or angle of a receiving unit.

Wireless power transfer technology is for wirelessly transmitting electrical power from a power source, which is useful when it is difficult or inconvenient to transfer power over a wired connection. These benefits are expanding the wireless power transfer market worldwide. In particular, as the use of electronic products including portable devices, or clinical or laboratory devices increases, the demand for convenient charging of them also increases.

A method of transmitting energy wirelessly includes a method using electromagnetic induction (for example, a transformer or an electric motor) in which a current flowing in a receiving coil located near a transmitting coil is induced by a current flowing in the transmitting coil. A method using electromagnetic radiation in the form of waves (eg, microwaves) and a magnetic resonant coupling method for receiving energy using a resonance phenomenon with a non-radioactive electromagnetic field formed by power from a power source; There is this.

Unlike wired power transmission, transmission efficiency in a wireless power transmission system in which a transmitting unit that transmits power and a receiving unit that receives power are not in contact with each other is one of practical concerns. In other words, whether a significant portion of the power transmitted from the transmitting unit reaches the receiving unit may determine the usefulness of the wireless power transfer system.

In addition, it is sometimes necessary to charge a plurality of receiving units with one transmitting unit. For example, several electronic appliances may be placed in a room or a certain area of a building, and it may be desirable to charge them with one transmission unit that is placed or installed at some point in the building (such as the wall of the room). In addition, when there are many neural prosthetic devices implanted in the human body, for example, when an artificial retina is implanted in both eyes, it is convenient to supply them with one transmission unit.

Electromagnetic radiation can be used for wireless power transfer over long distances. However, when electromagnetic waves are radiated in a non-directional manner, only a part of energy reaches the receiving side, which is a transmission target, and most of the energy is wasted in the surrounding space. In order to guarantee transmission efficiency, there is a hassle to improve the directionality of the antenna. In addition, the radiated electromagnetic wave is rapidly weakened as the traveling distance increases, so that the size of the antenna must be large to transmit sufficient energy per unit time.

Electromagnetic induction allows for the transfer of energy from a transmitting coil to a receiving coil located proximate the transmitting coil. However, practical efficiency can be obtained when the transmitting coil and the receiving coil are located very close (for example, at a distance less than the wavelength of the transmission signal). In order to transmit power to the implanted neural prosthetic device, the distance between the external coil for transmitting power and the internal coil included in the neural prosthetic device must be kept within a few mm, so the external coil needs to be closely attached to the neural prosthetic device. There is. In this regard, it is difficult to supply power to several receiving units with one transmitting unit.

In the case of using magnetic resonance, the transmitting coil and the receiving coil are configured to be tuned to the same resonant frequency, so that a considerable amount of power can be transmitted to the receiving coil located several times larger than the size of the transmitting coil. However, since the position or attitude of the receiving coil is very sensitive in terms of transmission efficiency, even if the receiving coil deviates only slightly from an optimal point or angle, the transmission efficiency is drastically reduced.

The present invention is to recognize the above problems, by transmitting the wireless power in a magnetic resonance method using two transmission coil unit, to ensure a high transmission efficiency without close contact between the transmission unit and the receiving unit for power transmission Has its purpose.

 In addition, an object of the present invention is to maintain the efficiency above a certain level without rapidly changing the transmission efficiency according to the distance or angle of the receiving unit with respect to the transmitting unit through the arrangement of the two transmitting coil unit.

The object of the present invention is not limited to the above-mentioned object, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention for achieving the above object, as a first transmitting coil unit for wirelessly transmitting power received from a power source to the receiving coil unit, is electrically connected to the power source and the power from the power source A first transmission coil wiper having a first power coil receiving a first transmission and a first transmission resonator magnetically connected to the first power coil and receiving at least some of the power received by the first power coil; And a second transmission coil part spaced apart from the first transmission coil part and having a second transmission resonator, wherein both the first transmission resonator and the second transmission resonator are received by resonance with the reception coil part. Provided is a wireless power transmitter configured to transmit power to a coil unit.

The second transmitting coil unit may further include a second power coil electrically connected to the power source and receiving power from the power source, wherein the second transmission resonator is magnetically connected to the second power coil and the second power coil. Provided is a wireless power transmitter for receiving at least some of the power received by a two power coil.

The first transmission resonator and the second transmission resonator may have a number of turns greater than 1, and the first power coil and the second power coil may have a number of turns.

In addition, at least some of the power received by the first transmission resonator is transmitted to the reception coil unit by resonance of the first transmission resonator and the reception coil unit, and at least of the power received by the second transmission resonator. Some provide a wireless power transmission apparatus that is transmitted to the receiving coil unit by resonance with the receiving coil unit.

In addition, the second transmission resonator resonates at a resonance frequency of the first transmission resonator to receive at least a portion of power received by the first transmission resonator, and at least a portion of the power received by the second transmission resonator is Provided is a wireless power transmission apparatus that is transmitted to the receiving coil unit by resonance with the receiving coil unit.

In addition, at least one of the winding surface of the first transmission resonator and the winding surface of the second transmission resonator may be displaced at right angles with respect to an axis passing through the center of the winding surfaces of each of the first transmission resonator and the second transmission resonator. Provided is a wireless power transmission apparatus.

The present invention also provides a wireless power transmitter further comprising a control unit for controlling power from the power source and a driving unit having the power source.

According to another embodiment of the invention, one or a plurality of receiving units, each of the one or the plurality of receiving units having a receiving coil section for wirelessly receiving power, and power supplied from a power source And a transmitting unit having a first transmitting coil unit for transmitting the wireless unit to the receiving coil unit wirelessly and a second transmitting coil unit spaced apart from the first transmitting coil unit, wherein the first transmitting coil unit is the power source. A first power coil electrically connected to and receiving power from the power source, and a first transmit resonator magnetically connected to the first power coil and receiving at least some of the power received by the first power coil. The second transmission coil unit includes a second transmission resonator, and both the first transmission resonator and the second transmission resonator are connected to the reception coil unit. Provided is a wireless power transmission system configured to transmit power to the receiving coil unit by resonance.

In addition, the receiving coil unit provides a wireless power transmission system including a receiving resonator for receiving power transmitted by the resonance with the first transmission resonator and the second transmission resonator.

The receiving coil unit may further include a load coil magnetically connected to the receiving resonator and receiving at least some of the power received by the receiving resonator.

In addition, the receiving resonator provides a wireless power transmission system in which the number of turns is greater than one, and the load coil has a number of turns.

In addition, the one or more of each of the plurality of receiving units provides a wireless power transfer system further comprising a load circuit to which power received by the load coil is transferred.

In addition, the one or the plurality of respective receiving units provide a wireless power transfer system inserted into or mounted to a human body or animal.

The second transmitting coil unit may further include a second power coil electrically connected to the power source and receiving power from the power source, wherein the second transmission resonator is magnetically connected to the second power coil and the second power coil. A wireless power transfer system is provided that receives at least some of the power received by a two power coil.

The first transmission resonator and the second transmission resonator may have a number of turns greater than 1, and the first power coil and the second power coil may have a number of turns.

In addition, at least some of the power received by the first transmission resonator is transmitted to the reception coil unit by resonance of the first transmission resonator and the reception coil unit, and at least of the power received by the second transmission resonator. Some provide a wireless power transmission system that is transmitted to the receiving coil unit by resonance with the receiving coil unit.

In addition, the second transmission resonator resonates at a resonance frequency of the first transmission resonator to receive at least a portion of power received by the first transmission resonator, and at least a portion of the power received by the second transmission resonator is Provided is a wireless power transmission system that is transmitted to the receiving coil unit by resonance with the receiving coil unit.

In addition, at least one of the winding surface of the first transmission resonator and the winding surface of the second transmission resonator may be displaced at right angles with respect to an axis passing through the center of the winding surfaces of each of the first transmission resonator and the second transmission resonator. Provided is a wireless power transmission system.

The present invention also provides a wireless power transmission system including a control unit for controlling power from the power source and a driving unit having the power source.

Specific matters according to various embodiments of the present invention are included in the following detailed description and drawings.

According to an embodiment of the present invention, by using the arrangement of the two transmitting coil unit for wireless power transmission, high transmission efficiency is ensured, and even if the distance or angle of the receiving unit with respect to the transmitting unit is changed to maintain a certain level or more It can be effective.

1 is a diagram illustrating a wireless power transmission system according to an embodiment of the present invention.
2 is a top view illustrating the arrangement of the dual transmitting coil unit and the receiving coil unit according to the exemplary embodiment of the present invention.
3A and 3B are graphs illustrating power transmission efficiency according to a distance between a receiving coil unit with respect to a transmitting coil unit and an angle of a receiving coil unit with respect to a central axis in the wireless power transmission system according to an exemplary embodiment of the present invention.
4A and 4B are graphs illustrating a relationship between transmission efficiency according to an arrangement of dual transmission coil parts and an angle of a reception coil part with respect to a central axis in a wireless power transmission system according to an exemplary embodiment of the present invention.
5 is a simplified view of a system for filling an artificial retina according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving the same will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. It is provided to fully inform the scope of the invention, and the invention is defined only by the scope of the claims. In addition, when it is determined that the detailed description of the related well-known configuration or function may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention;

1 is a diagram illustrating a wireless power transmission system according to an embodiment of the present invention.

Referring to FIG. 1, the wireless power transfer system 100 includes a transmitting unit 110 and a receiving unit 120.

The transmission unit 110 supplies a dual transmitter coil unit 130 and a dual transmission coil unit 130 for transmitting power wirelessly to the reception unit 120 and a driving unit for driving the dual transmission coil unit 130. 140). The driver 140 includes a power source 141 (eg, a class E amplifier having an operating frequency of 2.5 MHz), and although not shown, the dual transmission coil unit 130 controls power from the power source 141. It may further include a control unit for adjusting the magnetic field generated by the).

The receiving unit 120 includes a receiving coil unit 121 for receiving the power transmitted wirelessly from the transmitting unit 110, and the power received from the dual transmitting coil unit 130 by the receiving coil unit 121. Is transmitted to the load circuit 128 included in the receiving unit 120. In addition, although the wireless power transmission system 100 of FIG. 1 is illustrated as including one receiving unit 120, in another embodiment of the present invention, a plurality of receiving units may be included in the wireless power transmission system 100. .

The dual transmitting coil unit 130 is composed of two transmitting coil units, that is, the first transmitting coil unit 131 and the second transmitting coil unit 132. In one embodiment, the first transmitting coil unit 131 and the second transmitting coil unit 132 are spaced apart at regular intervals, the first transmitting coil unit ( The characteristics of the magnetic field generated between the 131 and the second transmitting coil unit are different. For example, at a specific point between the first transmitting coil unit 131 and the second transmitting coil unit, the first transmitting coil unit 131 and the second transmitting coil unit ( 132 may be spaced apart. The dual transmission coil unit 130 may be, for example, a Helmholtz coil or a coil of a similar type.

Furthermore, as described above, power is transferred from the power supply 141 to the dual transmission coil unit 130 through the driving unit 140, so that both the first transmission coil unit 131 and the second transmission coil unit 132 are powered. 141 may be electrically connected. Alternatively, the transmitting unit 110 may be configured such that only one of the first transmitting coil unit 131 or the second transmitting coil unit 132 is electrically connected to the power source 141. Hereinafter, for convenience of explanation, it is assumed that at least the first transmitting coil unit 131 is connected to the power source 141.

1, the first transmission coil unit 131 may include a first power coil 133 and a first transmission resonator 134. Here, the first power coil 133 is electrically connected to the power source 141, and the first transmission resonator 134 is disposed not to be in contact with the first power coil 133. The first power coil 133 may be a loop having a winding number of 1 and the first transmission resonator 134 may be a spiral multi-turn coil. However, the number of windings of the first power coil 133 and the first transmission resonator 134 is not necessarily limited as described above. In addition, the first transmission resonator 134 may have a configuration in which one coil exists in one layer, or may include a configuration in which a plurality of coils (for example, a plurality of multi-turn coils) exist in one layer. The coil may be composed of multiple layer structures.

Similarly, the second transmission coil unit 132 may include a second power coil 135 electrically connected to the power source 141 and a second transmission resonator 136 disposed not to contact the second power coil 135. Can be. Here, the second power coil 135 and the second transmission resonator 136 may be a single-turn loop and a multi-turn coil, respectively. However, the number of windings of the second power coil 135 and the second transmission resonator 136 is not necessarily limited as described above. Also, like the first transmission resonator 134, the second transmission resonator 136 may be configured such that a predetermined number of coils exist in a predetermined number of layers. However, in one embodiment, when only the first transmission coil unit 131 is to be electrically connected to the power source 141, the second power coil 135 may not be included in the second transmission coil unit 132. .

On the other hand, the receiving coil unit 121 may include a load coil 123 and the receiving resonator 124 disposed so as not to contact each other. In one embodiment, receive resonator 124 may be a multi turn coil and load coil 123 may be a single turn loop. In addition, similar to the transmission resonators 134 and 136, the reception resonator 124 may be configured such that a predetermined number of coils exist in a predetermined number of layers. However, the number of windings of the load coil 123 and the receiving resonator 124 is not necessarily limited as described above.

According to one embodiment, the process of transmitting power from the transmitting unit 110 to the receiving unit 120 in the wireless power transmission system 100 is schematically as follows.

First, when AC power is supplied from the power supply 141 to the first power coil 133 on the transmission unit 110 side, a magnetic field is generated around the first power coil 133. As a result, the first resonator 134 in an open state is magnetically connected to the first power coil 133 to store energy. Here, the first power coil 133 and the first transmission resonator 134 are disposed so close that the first transmission resonator 134 is sufficiently excited by the above magnetic field. On the other hand, if the second power coil 135 is also electrically connected to the power source 141, the power supplied to the second power coil 135 is a second transmission resonator (located near the second power coil 135 as described above) 136) to store energy. In this case, the resonant frequencies of the first transmission resonator 134 and the second transmission resonator 136 may be set to be the same.

Next, the power transmitted to the first transmission resonator 134 is transferred by resonance to the reception resonator 124 tuned to the same resonance frequency as the first transmission resonator 134. When the second power coil 135 is connected to the power source 141, the power transmitted to the second transmission resonator 136 may be absorbed by the reception resonator 124 as well. When the second power coil 135 is not connected to the power source 141, the second transmission resonator 136 is a passive element and passively resonates at a resonance frequency according to the first transmission resonator 134 to generate power. Receive and it may be passed back to receive resonator 124 tuned to that frequency. (The resonant frequencies of the transmitting coil parts 131 and 132 and the receiving coil part 121 can be tuned substantially the same using a capacitor.)

The power received by the reception resonator 124 is transmitted to the load coil 123 magnetically connected to the reception resonator 124, which in turn loads the load circuit 128 included in the reception unit 120 through the load coil 123. (E.g., rectifier circuit).

2 is a top view illustrating the arrangement of the dual transmitting coil unit and the receiving coil unit according to the exemplary embodiment of the present invention. Here, the central axis 200 is the winding surface of the first transmission resonator 134 of the first transmission coil unit 131 shown by the dotted line and the second transmission resonator of the second transmission coil unit 132 shown by the dotted line. It is assumed that the axis passes through the center of the winding surface (if a magnetic flux passing through each transmission resonator is generated by the power source, most of the generated magnetic flux passes through the winding surface). Referring to FIG. 2, the first transmitting coil unit 131 and the second transmitting coil unit 132 each have a winding surface of the first transmission resonator 134 and a second transmission resonator 136 with respect to the central axis 200. The winding surface of may be disposed at right angles as shown by the dotted line, or may be disposed away from the right angle at a constant angle as shown by the solid line. (Ie, the winding surfaces of the first transmission resonator 134 and the second transmission resonator 136 may be parallel to each other or may be staggered with each other.) For this arrangement, the first transmission coil portion 131 and the second If the relative angle between the transmitting coil unit 132 or the degree of each distortion is changed, the magnetic field formed near the two transmitting coil units 131 and 132 also varies, and the transmission efficiency in the receiving coil unit 121 may also vary accordingly. have. The winding surface of the reception resonator 124 of the reception coil unit 121 may also have a normal line on the central axis 200 or may not coincide with the central axis 200. For example, when the receiving unit 120 including the receiving coil unit 121 is mounted on the moving body, the receiving coil unit 121 may be placed at an angle 210 with the central axis. Meanwhile, the distance between the receiving coil unit 121 and the dual transmitting coil unit 130 may also be an arbitrary value. In FIG. 2, the receiving coil unit 121 is positioned at a distance separated by R from the first transmitting coil unit 131 and D-R from the second transmitting coil unit 132.

3A and 3B are graphs illustrating power transmission efficiency according to a distance between a receiving coil unit with respect to a transmitting coil unit and an angle of a receiving coil unit with respect to a central axis in the wireless power transmission system according to an exemplary embodiment of the present invention.

As shown in FIG. 3A, the transmission efficiency of the wireless power transmission system 100 including the dual transmission coil unit 130 is located at the position of the reception coil unit 121, for example, the first transmission coil unit 131 and the reception coil unit. Even if the distance of 121 is changed, it can be seen that it is maintained higher than the system employing only one transmitting coil unit and that the amount of change is not rapid.

In addition, as shown in FIG. 3B, even if the angle 210 of the receiving coil unit 121 with respect to the central axis is changed, the wireless power transmission system 100 including the dual transmitting coil unit 130 has only one transmitting coil unit. More efficient than the system used.

4A and 4B are graphs illustrating a relationship between transmission efficiency according to an arrangement of dual transmission coil parts and an angle of a reception coil part with respect to a central axis in a wireless power transmission system according to an exemplary embodiment of the present invention.

4A illustrates a case in which the first transmission coil unit 131 and the second transmission coil unit 132 of the wireless power transmission system 100 are arranged side by side (for example, the first transmission resonator 134 and the second). Fluxes passing through the winding surface of the receiving resonator 124 of the receiving coil unit 121 according to the angle 210 of the receiving coil unit 121 when the winding surfaces of the transmitting resonator 136 are parallel to each other). To show. 4B illustrates a case where the first transmission coil unit 131 and the second transmission coil unit 132 are alternately disposed at a predetermined angle as described above (for example, the first transmission resonator 134 and the second transmission resonator). When the winding faces of 136 are crossed with each other), the magnetic flux passing through the winding face of the receiving resonator 124 of the receiving coil part 121 with respect to the angle 210 of the receiving coil part 121 is shown. 4A and 4B, when the first transmitting coil unit 131 and the second transmitting coil unit 132 are arranged to be staggered, even if the angle 210 of the receiving coil unit 121 is 60 degrees or more, the constant is constant. It can be seen that the magnetic flux above the level passes through the winding surface of the reception resonator 124 of the reception coil unit 121. In another aspect, the magnetic flux is not severely changed at least in part of the angle 210 with respect to the angle 210 of the receiving coil unit 121. As such, the wireless power transmission system 100 may transmit power in which transmission efficiency does not change sensitively to the angle 210 of the receiving coil unit 121.

The wireless power transfer system 100 according to an embodiment of the present invention may be used to configure various contactless charging systems.

For example, neural prosthetic devices implanted into the human body, such as artificial retinas, cardiac brain stimulators, or artificial snail tubes, include electronic modules that generate stimulus signals. Wired transmission is practically difficult and battery-powered to power these electronic modules. The way to make it is inconvenient to replace the battery frequently. In contrast, if the neural prosthetic device includes the receiving unit 120 and the transmitting unit 110 is worn outside the human body, the nerve is transmitted through the wireless power transmission from the dual transmitting coil unit 130 to the receiving coil unit 121. Power may be supplied to a load circuit 128 such as an electronic module in the prosthetic device. (On the other hand, the receiving unit 120 inserted into the human body may be packaged with liquid crystal polymer (LCP), which is harmless to the living body and easy to seal.) Furthermore, the wireless power transmission system 100 may be magnetic resonance. In consideration of the use of, the transmission unit 110 and the receiving unit 120 do not need to be in close contact as in the electromagnetic induction scheme. Therefore, referring to FIG. 5, the wireless power transmission system 100 includes a necklace in which one of the first transmission coil unit 131 and the second transmission coil unit 132 is disposed on or on the surface thereof, and the other is inside thereof. Alternatively, a hat or a headband disposed on the surface may be worn, thereby filling the receiving coil part 121 in the artificial retina. The wireless power transmission system 100 can provide a stable power supply due to the above-described features. Here, instead of connecting the power source 141 to both the first transmitting coil unit 131 and the second transmitting coil unit 132, it is possible to take the form of connecting the power source 141 to only one side, and at this time, one transmission It is possible to obtain high transmission efficiency rather than using only the coil part.

As another example, when an experiment is performed in which an electronic device is inserted or implanted into a test subject (eg, an animal), and then the subject is observed in the test cage, the experiment is performed to charge the electronic device inside the test subject. The transmitting unit 130 may be configured in such a manner that the first transmitting coil portion 131 and the second transmitting coil portion 132 are disposed on or in the opposing side surfaces, respectively. If the electronic device includes the receiving unit 120, the electronic device can be efficiently charged like the charging system illustrated above. In particular, since it is not necessary to mount one external power transmission module per object under test, one external module can supply power to a plurality of objects. In addition, even if the test subject moves to a random position or takes an arbitrary posture, it is possible to stably supply power of a predetermined level or more. Furthermore, since the external module for transmitting power to the device inside the object under test does not need to be in close contact with the object under test, a failure of the external module due to the movement of the object under test can be prevented.

As another example, in order to charge general electronic products (portable devices, home appliances, etc.), the first transmitting coil unit 131 and the second transmitting coil unit 132 are respectively provided on opposite sides of the bookshelf-type device. ) Or the first transmitting coil portion 131 and the second transmitting coil portion 132 on or inside the walls and the walls facing or facing the transmission unit 130. Can be configured. When the electronic product including the receiving unit 120 is placed in the magnetic field generated around the first transmitting coil unit 131 and the second transmitting coil unit 132, power can be supplied, and the transmission efficiency is also determined at the position or posture. It doesn't make a big difference, so you can conveniently charge your electronics.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may be embodied in various other forms without changing the technical spirit or essential features of the present invention. I can understand that. Therefore, the embodiments described above are illustrative in all respects and should not be understood as limiting.

100: wireless power transmission system
110: transmission unit
120: receiving unit
121: receiving coil unit
123: load coil
124: receiving resonator
128: load circuit
130: dual transmission coil unit
131: first transmitting coil unit
132: second transmitting coil unit
133: first power coil
134: first transmission resonator
135: second power coil
136: second transmission resonator
140: drive unit
141: power
200: central axis
210: angle (Θ)

Claims (19)

A first transmitting coil unit for wirelessly transmitting power received from a power source to a receiving coil unit, the first power coil electrically connected to the power source and magnetically receiving the first power coil and the first power coil. A first transmitting coil unit coupled to and having a first transmitting resonator for receiving at least a portion of the power received by the first power coil;
A second transmission coil part spaced apart from the first transmission coil part and having a second transmission resonator,
Both the first transmission resonator and the second transmission resonator are configured to transmit power to the reception coil unit by resonance with the reception coil unit.
Wireless power transmitter
The method of claim 1,
The second transmitting coil unit further includes a second power coil electrically connected to the power source and receiving power from the power source, wherein the second transmission resonator is magnetically connected to the second power coil and the second power Receiving at least some of the power received by the coil
Wireless power transmitter
The method of claim 2,
The first transmission resonator and the second transmission resonator have a number of turns greater than one, and the first power coil and the second power coil have a number of turns.
Wireless power transmitter
The method of claim 2,
At least some of the power received by the first transmission resonator is transmitted to the receiving coil unit by resonance of the first transmission resonator and the receiving coil unit, and at least some of the power received by the second transmission resonator is Transmitted to the receiving coil by resonance with the receiving coil
Wireless power transmitter
The method of claim 1,
The second transmission resonator resonates at a resonance frequency of the first transmission resonator to receive at least some of the power received by the first transmission resonator, and at least some of the power received by the second transmission resonator is received. Transmitted to the receiving coil by resonance with a coil
Wireless power transmitter
The method of claim 1,
At least one of the winding surface of the first transmission resonator and the winding surface of the second transmission resonator may be displaced at right angles with respect to an axis passing through the center of the winding surface of each of the first transmission resonator and the second transmission resonator.
Wireless power transmitter
The method of claim 1,
Further comprising a control unit for controlling the power from the power source and a drive unit having the power source
Wireless power transmitter
In a wireless power transfer system,
One or multiple receiving units, each of the one or more receiving units having a receiving coil section for wirelessly receiving power; and
And a transmitting unit having a first transmitting coil unit for wirelessly transmitting power supplied from a power source to the receiving coil unit and a second transmitting coil unit spaced apart from the first transmitting coil unit.
The first transmitting coil unit may be configured to at least a portion of a first power coil electrically connected to the power source and receiving power from the power source, and at least a portion of the power received by the first power coil and magnetically connected to the first power coil. A first transmission resonator for receiving,
The second transmission coil unit includes a second transmission resonator,
Both the first transmission resonator and the second transmission resonator are configured to transmit power to the reception coil unit by resonance with the reception coil unit.
Wireless power transfer system.
9. The method of claim 8,
The receiving coil unit includes a receiving resonator configured to receive power transmitted by resonance with the first transmission resonator and the second transmission resonator.
Wireless power transfer system.
10. The method of claim 9,
The receiving coil unit further includes a load coil magnetically connected to the receiving resonator and receiving at least a portion of the power received by the receiving resonator.
Wireless power transfer system.
The method of claim 10,
The receiving resonator has a number of turns greater than one, and the load coil has a number of turns.
Wireless power transfer system.
The method of claim 10,
The one or more respective receiving units further comprise load circuits through which power received by the load coils is delivered.
Wireless power transfer system.
9. The method of claim 8,
The one or the plurality of respective receiving units are inserted into or mounted to a human body or animal.
Wireless power transfer system.
9. The method of claim 8,
The second transmitting coil unit further includes a second power coil electrically connected to the power source and receiving power from the power source, wherein the second transmission resonator is magnetically connected to the second power coil and the second power Receiving at least some of the power received by the coil
Wireless power transfer system.
15. The method of claim 14,
The first transmission resonator and the second transmission resonator have a number of turns greater than one, and the first power coil and the second power coil have a number of turns.
Wireless power transfer system.
15. The method of claim 14,
At least some of the power received by the first transmission resonator is transmitted to the receiving coil unit by resonance of the first transmission resonator and the receiving coil unit, and at least some of the power received by the second transmission resonator is Transmitted to the receiving coil by resonance with the receiving coil
Wireless power transfer system.
9. The method of claim 8,
The second transmission resonator resonates at a resonance frequency of the first transmission resonator to receive at least some of the power received by the first transmission resonator, and at least some of the power received by the second transmission resonator is received. Transmitted to the receiving coil by resonance with a coil
Wireless power transfer system.
9. The method of claim 8,
At least one of the winding surface of the first transmission resonator and the winding surface of the second transmission resonator may be displaced at right angles with respect to an axis passing through the center of the winding surface of each of the first transmission resonator and the second transmission resonator.
Wireless power transfer system.
9. The method of claim 8,
Further comprising a control unit for controlling the power from the power source and a drive unit having the power source
Wireless power transfer system.

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