CN111048298B - Power transmission coil and wireless power supply device - Google Patents
Power transmission coil and wireless power supply device Download PDFInfo
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- CN111048298B CN111048298B CN201910962481.7A CN201910962481A CN111048298B CN 111048298 B CN111048298 B CN 111048298B CN 201910962481 A CN201910962481 A CN 201910962481A CN 111048298 B CN111048298 B CN 111048298B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
Abstract
Provided are a power transmission coil and a wireless power feeding device, which can suppress the adverse effect of current flowing in a straight part on the magnetic field of a section contributing to power feeding when the path of the coil has the adjacent straight part. The power transmission coil (110) has a1 st region (111) and a 2 nd region (112), the 1 st region (111) has a linear path (111d), and the 2 nd region (112) has a linear path (112 d). The path of the 1 st region (111) is connected to the path of the 2 nd region (112). The 1 st region (111) and the 2 nd region (112) are adjacent to each other with a gap therebetween. The path (111d) and the path (112d) face each other with a gap therebetween. The direction of the current flowing through the path (111d) is the same as the direction of the current flowing through the path (112 d).
Description
Technical Field
The technical field of the present specification relates to a power transmission coil and a wireless power supply device.
Background
In recent years, techniques for wirelessly supplying power to portable communication terminals such as smartphones and other electronic devices have been actively studied and developed. In addition, a technology for wirelessly supplying power to an electronic device for a vehicle is also being developed.
As a coil used for wireless power supply, a coil wound in a shape of a letter 8 may be used. For example, patent document 1 discloses a power supply coil 11a and a power reception coil 21a wound in an 8-shaped pattern a plurality of times (see fig. 3 and the like of patent document 1). It is disclosed that, by reversing the direction of current flowing through 2 adjacent coil portions in an 8-shape, the 2 coil portions absorb magnetic lines of force mutually (paragraph [ 0043 ] of patent document 1). Further, it is disclosed that the unnecessary electromagnetic field radiation can be suppressed from leaking around the power transmitting coil 11a and the power receiving coil 21a (paragraph [ 0046 ] of patent document 1).
Patent document 2 discloses an antenna having loop coils 43A and 43B wound in an 8-shaped pattern 1 time (see fig. 1 and the like of patent document 2). It is disclosed that the magnetic flux 45 generated from one toroidal coil 43A enters the adjacent other toroidal coil 43B, and the magnetic flux 45 is closed (paragraph [ 0035 ] of patent document 2). This discloses that the magnetic flux density is high.
Patent document 1: japanese patent laid-open publication No. 2013-247822
Patent document 2: japanese laid-open patent publication No. H08-330838
However, depending on the place where the power transmission coil is disposed, it may be necessary to form the coil in a shape having a straight portion instead of a circular arc. In this case, the current flowing through the straight portion may adversely affect the magnetic field around the power transmission coil. In particular, when the straight portions are adjacent to each other, there is a concern that the current flowing through the straight portions has a relatively large influence on the magnetic field of the partition contributing to the power supply. In this case, noise may be generated in the current flowing through the power receiving coil.
Disclosure of Invention
An object of the present invention is to provide a power transmission coil and a wireless power feeding device that can suppress an adverse effect of a current flowing through a straight portion on a magnetic field of a section contributing to power feeding when a path of a coil has the adjacent straight portion.
The power transmission coil in the 1 st aspect has a1 st area having a1 st path including a straight portion and a 2 nd area having a 2 nd path including a straight portion. The path of the 1 st area is connected to the path of the 2 nd area. The 1 st region and the 2 nd region are adjacent to each other with a gap therebetween. The 1 st path and the 2 nd path are opposed to each other with a gap therebetween. An angle formed by a direction of a current flowing through the straight portion of the 1 st path and a direction of a current flowing through the straight portion of the 2 nd path is greater than or equal to 0 DEG and less than or equal to 10 deg.
In the power transmission coil, when the path of the coil has adjacent straight portions, it is possible to suppress an adverse effect of a current flowing in the straight portions on a magnetic field of a section contributing to power supply. That is, it is possible to make almost no noise generated at the time of power supply. Further, the power transmission coil may be easily arranged due to the presence of the straight portion.
ADVANTAGEOUS EFFECTS OF INVENTION
In the present specification, a power transmission coil and a wireless power feeding device are provided, which can suppress an adverse effect of a current flowing in a straight portion on a magnetic field of a section contributing to power feeding when a path of a coil has the adjacent straight portion.
Drawings
Fig. 1 is a diagram showing the shape of a power transmission coil according to embodiment 1.
Fig. 2 is a diagram illustrating a case where a current flows through the power transmission coil according to embodiment 1.
Fig. 3 is a diagram illustrating a magnetic field formed by a current flowing through the power transmission coil according to embodiment 1.
Fig. 4 is an enlarged view of the coupling portion of the power transmission coil of embodiment 1.
Fig. 5 is an enlarged view of a coupling portion of the power transmission coil in a modification example of embodiment 1.
Fig. 6 is a schematic diagram showing the appearance of the interior of the vehicle in embodiment 2.
Fig. 7 is a schematic diagram showing a schematic configuration of the wireless power feeding device according to embodiment 2.
Fig. 8 is a diagram schematically showing a circuit of the wireless power feeding apparatus according to embodiment 2.
Description of the reference numerals
100 … wireless power supply device
110 … power transmission coil
111 … area 1
111a, 111b, 111c, 111d … paths
112 … area 2
112a, 112b, 112c, 112d … path
112 … coupling part
120 … power receiving coil
130 … power transmission circuit
140 … power receiving circuit
150 … light emitting device
160 … frame body
R1 … partition 1
R2 … partition 2
R3 … partition 3
Detailed Description
Next, the power transmission coil and the wireless power supply device will be described by way of example with respect to specific embodiments. However, the technique in the present specification is not limited to these embodiments.
(embodiment 1)
1. Power transmission coil
Fig. 1 is a diagram showing the shape of a power transmission coil 110 according to the present embodiment. In fig. 1, the number of turns of the power transmission coil 110 is 3 turns. The material of the power transmission coil 110 is a metal wire. Examples of the wire material include single wires and twisted wires.
The power transmission coil 110 has 2 areas surrounding 2 partitions. The power transmission coil 110 has a1 st region 111, a 2 nd region 112, a coupling portion 113, an end portion 114, and an end portion 115. As can be seen from fig. 1, the wires connected together are classified into a1 st region 111, a 2 nd region 112, a coupling portion 113, an end portion 114, and an end portion 115. The 1 st region 111 and the 2 nd region 112 are substantially on the same plane.
1-1, region 1 and region 2
The 1 st area and the 2 nd area transmit power to other power receiving coils. The 1 st region 111 transmits power to the 1 st power receiving coil, and the 2 nd region 112 transmits power to the 2 nd power receiving coil. This way. The power transmission coil 110 can transmit power to 2 power receiving coils.
The 1 st area 111 has 4 paths 111a, 111b, 111c, 111 d. The 4 paths 111a, 111b, 111c, 111d are paths including straight line portions. The 4 paths 111a, 111b, 111c, and 111d generate magnetic fields near the center of the 1 st region 111, respectively. In this way, since the 4 paths 111a, 111b, 111c, and 111d surround the 1 st segment R1, a relatively strong magnetic field is formed around the 1 st segment R1.
Zone 2 has 4 paths 112a, 112b, 112c, 112 d. The 4 paths 112a, 112b, 112c, 112d are paths containing straight portions. The 4 paths 112a, 112b, 112c, 112d each generate a magnetic field near the center of the 2 nd region 112. In this way, since the 4 paths 112a, 112b, 112c, and 112d surround the 2 nd segment R2, a relatively strong magnetic field is formed around the 2 nd segment R2.
The path 111d is the 1 st path including a straight line portion. The path 112d is a 2 nd path including a straight line portion. The path 111d and the path 112d are opposed to each other with a gap. As described above, the path of the 1 st region 111, the path of the 2 nd region 112, and the path of the coupling portion 113 are connected. The 1 st region 111 and the 2 nd region 112 are adjacent to each other with a gap therebetween.
1-2. coupling part
The coupling portion 113 couples the 1 st region 111 and the 2 nd region 112. The length of the coupling portion 113 is sufficiently shorter than the paths 111a, 111b, 111c, and 111d and the paths 112a, 112b, 112c, and 112 d.
1-3, 1 st, 2 nd and 3 rd partitions
The 1 st partition R1 is a partition surrounded by the paths 111a, 111b, 111c, 111d of the 1 st area 111. The 2 nd partition R2 is a partition surrounded by the paths 112a, 112b, 112c, 112d of the 2 nd area 112. The 3 rd partition R3 is located between the 1 st area 111 and the 2 nd area 112 and is a partition not surrounded by a path. The 3 rd division R3 is a gap between the 1 st region 111 and the 2 nd region 112. Therefore, the width of the 3 rd segment R3 is narrower than the width of the 1 st segment R1 and the width of the 2 nd segment R2.
1-4 size of power transmission coil
If a plane surrounded by 1 turn of the power transmission coil 110 is assumed as an xy plane, the power transmission coil 110 is stacked in a z-axis direction perpendicular to the xy plane.
The horizontal axis direction in fig. 1 is assumed to be the x-axis direction. The length of the power transmission coil 110 in the x-axis direction is, for example, 10mm or more and 400mm or less. Preferably greater than or equal to 80mm and less than or equal to 350 mm. The length of the power transmission coil 110 in the y-axis direction is, for example, 10mm or more and 400mm or less. Preferably greater than or equal to 50mm and less than or equal to 100 mm. The length of the power transmission coil 110 in the z-axis direction is, for example, 0.5mm or more and 10mm or less. Further, the length of the coupling portion 113, i.e., the distance between the path 111d and the path 112d is, for example, greater than or equal to 20mm and less than or equal to 50 mm. These numerical ranges are standard and may be other than the above.
2. Current and magnetic field flowing in the power transmission coil
2-1. current
Fig. 2 is a diagram illustrating a case where a current flows through the power transmission coil 110 according to the present embodiment. An alternating current flows through the power transmission coil 110. In fig. 2, the flow of current at a certain time is indicated by an arrow.
As shown in fig. 2, in this case, the current flows through end 114, path 111a, coupling portion 113, path 112d, path 112c, path 112b, path 112a, coupling portion 113, path 111d, path 111c, and path 111b in this order, and reaches end 115.
In addition, currents flow in opposite directions to each other in the adjacent paths of the coupling portion 113.
2-2. magnetic field
In the 1 st segment R1, the currents flowing through the paths 111a, 111b, 111c, and 111d form magnetic fields. The magnetic fields reinforce each other. In the 1 st segment R1, the magnetic field is formed in the + z direction from the back surface to the front surface of the paper.
In the 2 nd segment R2, the currents flowing through the paths 112a, 112b, 112c, and 112d form magnetic fields. The magnetic fields reinforce each other. In the 2 nd division R2, the magnetic field is formed toward the-z-axis direction from the surface to the back of the paper.
At this time, the current flows in the same direction through the opposite path 111d and path 112 d. In the 3 rd division R3 between the path 111d and the path 112d, the 1 st magnetic field formed by the current flowing through the path 111d and the 2 nd magnetic field formed by the current flowing through the path 112d cancel each other out. That is, in the 3 rd partition R3, the magnetic field is not strengthened.
In practice, the current flowing through the power transmission coil 110 is alternating current. Even when alternating current is considered, the magnetic field is intensified in the 1 st direction in the 1 st segment R1 of the 1 st region 111, and the magnetic field is intensified in the 2 nd direction in the 2 nd segment R2 of the 2 nd region 112. Here, the 1 st direction and the 2 nd direction are diametrically opposite directions. Thus, the direction of the magnetic field of the 1 st section R1 is opposite to the direction of the magnetic field of the 2 nd section R2. On the other hand, in the 3 rd division region located between the 1 st division region R1 and the 2 nd division region R2, the magnetic field is weakened.
3. Effects of the present embodiment
Fig. 3 is a schematic diagram illustrating a magnetic field formed by a current flowing through the power transmission coil 110 according to the present embodiment. As shown in fig. 3, a magnetic field coupling the 1 st section R1 and the 2 nd section R2 is formed. The flow of the magnetic field is shown by arrow L1 in fig. 3. Thus, the magnetic field of the 1 st section R1 and the magnetic field of the 2 nd section R2 reinforce each other. The magnetic flux penetrates and closes the 1 st segment R1 and the 2 nd segment R2.
Further, the 3 rd segment R1 that attenuates the magnetic field is located between the 1 st segment R1 and the 2 nd segment R2, whereby the magnetic fields of the 1 st segment R1 and the 2 nd segment R2 are hardly affected by the magnetic field of the 3 rd segment R3. The magnetic fields of the 1 st segment R1 and the 2 nd segment R2 greatly fluctuate by the alternating current, but the magnetic field of the 3 rd segment R3 is still in a small state. Thus, the 3 rd partition R3 functions as a buffer partition for the 1 st partition R1 and the 2 nd partition R2.
Thus, the magnetic field formed by the power transmission coil 110 is stabilized. Therefore, when a current flows through the power transmission coil 110, high-frequency noise and the like are less likely to be generated.
Since the coupling portion 113 is separated from the 1 st segment R1 and the 2 nd segment R2 to some extent, it is conceivable that the magnetic field formed in the 1 st segment R1 and the 2 nd segment R2 is hardly affected by the current flowing through the path of the coupling portion 113.
4. Modification example
4-1 angle of the opposite linear path
In the present embodiment, the direction of the current flowing through the path 111d is the same as the direction of the current flowing through the path 112 d. However, the path 111d and the path 112d are not parallel to each other in some cases. Even in this case, the angle between the direction of the current flowing through the path 111d and the direction of the current flowing through the path 112d may be small. It is preferable that the angle between the direction of the current flowing through the path 111d and the direction of the current flowing through the path 112d is greater than or equal to 0 ° and less than or equal to 10 °. In addition, the angle is preferably greater than or equal to 0 ° and less than or equal to 5 °. Further, the direction of the current flowing through the path 111d and the direction of the current flowing through the path 112d are 0 °. The direction of the current flowing through the path 111d is 180 ° in the case where the direction of the current flowing through the path 112d is opposite.
4-2. laminating method
Fig. 4 is an enlarged view of the coupling portion 113 of the power transmission coil 110 of the present embodiment. As shown in fig. 4, the current flows in opposite directions in the adjacent wires. That is, in the coupling portion 113, a path through which a current flows from the 1 st region 111 to the 2 nd region 112 and a path through which a current flows from the 2 nd region 112 to the 1 st region 111 are alternately arranged.
Fig. 5 is an enlarged view of the coupling portion 113 of the power transmission coil 110 in a modification of the present embodiment. As shown in fig. 5, currents flow in the same direction in adjacent ones of the wire rods belonging to the same bundle. However, in the coupling portion 113, currents flow in opposite directions in the wire rods belonging to different bundles. That is, the coupling portion 113 includes the 1 st beam B1 and the 2 nd beam B2, the 1 st beam B1 collects paths through which current flows from the 1 st region 111 to the 2 nd region 112, and the 2 nd beam B2 collects paths through which current flows from the 2 nd region 112 to the 1 st region 111.
4-3. curve part
The path of power transmission coil 110 may also have a curved portion. For example, the portions corresponding to the paths 111a and 112a may be curved. Of course, the portion corresponding to the other path may be a curved shape. However, as described in embodiment 2, if the arrangement of the power transmission coils 110 is considered, it may be preferable that each path is linear.
The paths corresponding to the paths 111d and 112d may include curved shapes. Even in this case, the paths corresponding to the path 111d and the path 112d include at least a straight line portion. Further, the angle of the angle formed by the straight line portions of each path is preferably greater than or equal to 0 ° and less than or equal to 10 °.
4-4. combination
The above modifications may be freely combined.
(embodiment 2)
Embodiment 2 will be explained. In embodiment 2, a wireless power supply device suitable for using the power transmission coil 110 of embodiment 1 will be described.
1. Vehicle-mounted component
Fig. 6 is a schematic diagram showing the appearance of the interior of the vehicle. As shown in fig. 6, an instrument panel IP is present on the front surface of the driver's seat of the vehicle. The instrument panel IP is provided with a plurality of air conditioning registers CA 1. The air conditioner CA1 includes a housing 160 and a knob N1 for adjusting the direction of the air by the user. Knob N1 is capable of emitting light. This is to enable the user to easily grasp the position of the knob N1 even when the vehicle interior is dark.
2. Wireless power supply device
Fig. 7 is a schematic diagram showing a schematic configuration of the wireless power feeding apparatus 100 according to embodiment 1. The wireless power feeding apparatus 100 performs magnetic field coupling type wireless power feeding. As shown in fig. 7, the wireless power feeding device 100 includes 1 power transmission coil 110, 2 power receiving coils 120, a power transmission circuit 130, a power receiving circuit 140, a light emitting device 150, and a housing 160.
The resonant frequency of the wireless power supply system 100 is 6.78 MHz. Therefore, the frequency of the current flowing through the power transmission coil 110 and the power reception coil 120 is 6.78 MHz. The resonant frequency of the LC circuit of power transmission coil 110 is also 6.78 MHz. The resonant frequency of the LC circuit of the power receiving coil 120 is also 6.78 MHz. The frequency of the current flowing in the power transmission coil 110 by the power transmission circuit 130 is also 6.78 MHz. In practice, sometimes slightly deviates from the target frequency. Further, 6.78MHz is exemplified, but a resonance frequency of 500kHz or more and 15MHz or less may be adopted. Resonance frequencies other than those described above may also be used.
The power transmission coil 110 is a coil for forming a magnetic field around the power receiving coil 120. The power transmission coil 110 is connected in series with a capacitor described later. The power transmission coil 110 is formed of a wire. Examples of the wire material include single wires and twisted wires. The material of the power transmission coil 110 is, for example, copper. The power transmission coil 110 is provided in a shape surrounding 2 quadrangles. Power transmission coil 110 is hollow. It is preferable that the number of turns of the power transmission coil 110 is greater than or equal to 1 and less than or equal to 3. Of course, not limited to this numerical range. Further, in fig. 7, the number of turns of the power transmission coil 110 is 1. The power transmission coil 110 is fitted in a groove of the frame 160, for example.
The power receiving coil 120 is a coil that generates an electric current by a magnetic field formed by the power transmitting coil 110. The power receiving coil 120 is connected in series with a capacitor described later. The power receiving coil 120 is made of a wire rod. Examples of the wire material include single wires and twisted wires. The material of the power receiving coil 120 is, for example, copper. In fig. 7, the power receiving coil 120 has a nearly rectangular shape, but may have a spiral shape such as a spring.
The power transmission circuit 130 is a circuit for oscillating an ac voltage flowing through the power transmission coil 110. Power transmission circuit 130 generates an alternating current of 6.78 MHz.
The power receiving circuit 140 is a circuit for converting a current flowing through the power receiving coil 120 into a current suitable for the light emitting device 150. Specifically, the ac voltage of the power receiving coil 120 is converted into a dc voltage for driving the light emitting device 150. The power receiving circuit 140 may have other functions such as a rectifier circuit.
The light emitting device 150 is used to show the position of the knob N1 to the user in an easily known manner even in a dim vehicle. The light emitting device 150 is an electronic component driven by power from the power receiving coil 120. The light emitting device 150 constitutes a part of a knob N1 of an air conditioner register. The light-emitting device 150 has a semiconductor light-emitting element. The light emitting device 150 emits light by a dc voltage. The light-emitting device 150 is an electronic device or an electronic component. The knob N1 is an operation unit operated by the user. By changing the position of the knob N1, the user can adjust the wind direction of the air conditioner CA 1.
The housing 160 is a casing of the air conditioner CA 1. That is, the device surrounded by the casing 160 is the air conditioner CA 1. The frame 160 is made of, for example, plastic. The frame 160 is a housing of the device, and thus, has a sufficiently thin thickness.
3. Circuit of wireless power supply device
Fig. 8 is a diagram schematically showing a circuit of the wireless power feeding apparatus 100 according to the present embodiment. As shown in fig. 8, power transmission coil 110 forms an LC series circuit together with capacitor C1. The power receiving coil 120 and the capacitor C2 together form an LC series circuit. As described above, the circuit design is performed so that the resonance frequency of the LC series circuit on the power transmission coil 110 side and the resonance frequency of the LC series circuit on the power reception coil 120 side are equal to each other.
The power transmitted by the wireless power feeding apparatus 100 is 10W or less. For example 5W. The voltage for driving the light emitting device 150 is, for example, 5V. Of course, other values than those described above are also possible. The current flowing through the light emitting device 150 is less than or equal to 1 mA. Of course, other values than those described above are also possible.
In fig. 8, capacitor C1 is depicted as being located outside power transmission circuit 130. Fig. 8 is a conceptual diagram, and capacitor C1 may be included in power transmission circuit 130. Similarly, the capacitor C2 may be in the power receiving circuit 140.
4. Effects of the present embodiment
In the present embodiment, the 1 st region 111 and the 2 nd region 112 of the power transmission coil 110 surround the housing 160. The shape of the 1 st region 111 and the 2 nd region 112 corresponds to the frame 160. Therefore, the power transmission coil 110 is easily attached to the frame 160. Further, wireless power supply is possible even in a place where it is difficult to connect wiring, such as the knob N1 of the air conditioner CA 1. In this way, the flexibility of design of the vehicle components is improved.
In addition, vibration often occurs in a vehicle. Therefore, the position of the power transmission coil 110 to be fixed may be shifted. In the wireless power feeding device 100 of the present embodiment, the power transmission coil 110 is sufficiently fixed to the housing 160, and therefore, even when vibration is repeatedly generated in the vehicle, there is little concern that the position of the power transmission coil 110 may be displaced.
5. Modification example
5-1. support part
The support member provided in the frame 160 may have another shape or structure. For example, a jig, a spacer, or the like can be used
5-2. wireless power supply mode
The wireless power feeding apparatus 100 of the present embodiment is a magnetic field coupling system. However, the technique of embodiment 1 can be applied to a wireless power feeding device of an electromagnetic induction system.
5-3. frame body
The housing 160 of the present embodiment is a casing of an air conditioner register. However, the housing 160 may be a case of another vehicle-mounted component. In addition, the present invention may be an electric product other than the vehicle-mounted component. The material of the frame 160 is preferably glass, resin, plastic, or other non-conductive material.
5-4. electronic component
The wireless power feeding apparatus 100 of the present embodiment includes a light emitting device 150. The wireless power supply apparatus 100 may have other electronic devices or electronic components instead of the light-emitting device 150.
5-5. combination
The above modifications may be freely combined.
(attached note)
The power transmission coil in the 1 st aspect has a1 st area having a1 st path including a straight portion and a 2 nd area having a 2 nd path including a straight portion. The path of the 1 st area is connected to the path of the 2 nd area. The 1 st region and the 2 nd region are adjacent to each other with a gap therebetween. The 1 st path and the 2 nd path are opposed to each other with a gap therebetween. An angle formed by a direction of a current flowing through the straight portion of the 1 st path and a direction of a current flowing through the straight portion of the 2 nd path is greater than or equal to 0 DEG and less than or equal to 10 deg.
The power transmission coil in the 2 nd mode has a1 st division surrounded by a path of the 1 st area, a 2 nd division surrounded by a path of the 2 nd area, and a 3 rd division located between the 1 st division and the 2 nd division and not surrounded by a path. The direction of the magnetic field of the 1 st segment is opposite to the direction of the magnetic field of the 2 nd segment. In the 3 rd partition, the magnetic field formed by the current flowing through the 1 st path and the magnetic field formed by the current flowing through the 2 nd path cancel each other out.
The power transmission coil according to claim 3 includes a coupling portion for coupling the 1 st region and the 2 nd region. In the coupling portion, a path through which a current flows from the 1 st region to the 2 nd region and a path through which a current flows from the 2 nd region to the 1 st region are alternately arranged.
The transmission coil according to claim 4 includes a coupling portion for coupling the 1 st region and the 2 nd region. A1 st beam and a 2 nd beam are arranged in the coupling portion, the 1 st beam being obtained by collecting paths through which a current flows from the 1 st region to the 2 nd region, and the 2 nd beam being obtained by collecting paths through which a current flows from the 2 nd region to the 1 st region.
In the power transmission coil according to the 5 th aspect, the 1 st area path and the 2 nd area path are wires.
The wireless power feeding device according to claim 6 includes a power transmission coil and a power receiving coil. The power transmission coil has a1 st area having a1 st path including a straight portion and a 2 nd area having a 2 nd path including a straight portion. The path of the 1 st area is connected to the path of the 2 nd area. The 1 st region and the 2 nd region are adjacent to each other with a gap therebetween. The 1 st path and the 2 nd path are opposed to each other with a gap therebetween. An angle formed by a direction of a current flowing through the straight portion of the 1 st path and a direction of a current flowing through the straight portion of the 2 nd path is greater than or equal to 0 DEG and less than or equal to 10 deg.
Claims (11)
1. A power transmission coil, comprising:
a1 st region having a1 st path including a straight portion; and
a 2 nd region having a 2 nd path including a linear portion,
the path of the 1 st area is connected with the path of the 2 nd area,
the 1 st region and the 2 nd region are adjacent to each other with a gap therebetween,
the 1 st path and the 2 nd path are opposed to each other with the gap therebetween,
an angle formed by a direction of a current flowing through the straight portion of the 1 st path and a direction of a current flowing through the straight portion of the 2 nd path is greater than or equal to 0 DEG and less than or equal to 10 DEG,
having a coupling portion coupling the 1 st region and the 2 nd region,
the coupling portion has a plurality of paths,
the plurality of paths are adjacent to each other,
in the coupling portion, a path through which a current flows from the 1 st region to the 2 nd region and a path through which a current flows from the 2 nd region to the 1 st region are alternately arranged.
2. A power transmission coil according to claim 1,
the coupling part has a1 st coupling part and a 2 nd coupling part,
the current flows through the 1 st region, the 1 st coupling part, the 2 nd region, and the 2 nd coupling part in this order, and flows through a path to the 1 st region.
3. A power transmission coil, comprising:
a1 st region having a1 st path including a straight portion; and
a 2 nd region having a 2 nd path including a linear portion,
the path of the 1 st area is connected with the path of the 2 nd area,
the 1 st region and the 2 nd region are adjacent to each other with a gap therebetween,
the 1 st path and the 2 nd path are opposed to each other with the gap therebetween,
an angle formed by a direction of a current flowing through the straight portion of the 1 st path and a direction of a current flowing through the straight portion of the 2 nd path is greater than or equal to 0 DEG and less than or equal to 10 DEG,
having a coupling portion coupling the 1 st region and the 2 nd region,
the coupling portion has a plurality of paths,
the plurality of paths are adjacent to each other,
the coupling portion is provided with a1 st beam and a 2 nd beam, the 1 st beam being obtained by collecting paths through which current flows from the 1 st region to the 2 nd region, and the 2 nd beam being obtained by collecting paths through which current flows from the 2 nd region to the 1 st region.
4. The power transmission coil of claim 3,
the coupling part has a1 st coupling part and a 2 nd coupling part,
the current flows through the 1 st region, the 1 st coupling part, the 2 nd region, and the 2 nd coupling part in this order, and flows through a path to the 1 st region.
5. Power transmission coil according to any one of claims 1 to 4, characterized by having:
a1 st partition surrounded by a path of the 1 st area;
a 2 nd partition surrounded by a path of the 2 nd area; and
a 3 rd partition located between the 1 st partition and the 2 nd partition and not surrounded by a path,
the direction of the magnetic field of the 1 st section is opposite to that of the magnetic field of the 2 nd section,
in the 3 rd partition, a magnetic field formed by the current flowing through the 1 st path and a magnetic field formed by the current flowing through the 2 nd path cancel each other out.
6. A wireless power supply device having a power transmission coil and a power receiving coil, the wireless power supply device being characterized in that,
the power transmission coil has:
a1 st region having a1 st path including a straight portion; and
a 2 nd region having a 2 nd path including a linear portion,
the path of the 1 st area is connected with the path of the 2 nd area,
the 1 st region and the 2 nd region are adjacent to each other with a gap therebetween,
the 1 st path and the 2 nd path are opposed to each other with the gap therebetween,
an angle formed by a direction of a current flowing through the straight portion of the 1 st path and a direction of a current flowing through the straight portion of the 2 nd path is greater than or equal to 0 DEG and less than or equal to 10 DEG,
having a coupling portion coupling the 1 st region and the 2 nd region,
the coupling portion has a plurality of paths,
the plurality of paths are adjacent to each other,
in the coupling portion, a path through which a current flows from the 1 st region to the 2 nd region and a path through which a current flows from the 2 nd region to the 1 st region are alternately arranged.
7. The wireless power supply apparatus according to claim 6,
the coupling part has a1 st coupling part and a 2 nd coupling part,
the current flows through the 1 st region, the 1 st coupling part, the 2 nd region, and the 2 nd coupling part in this order, and flows through a path to the 1 st region.
8. The wireless power supply apparatus according to claim 6,
the power transmission coil is fixed on a frame body of an air conditioner air regulator of the vehicle.
9. A wireless power supply device having a power transmission coil and a power receiving coil, the wireless power supply device being characterized in that,
the power transmission coil has:
a1 st region having a1 st path including a straight portion; and
a 2 nd region having a 2 nd path including a linear portion,
the path of the 1 st area is connected with the path of the 2 nd area,
the 1 st region and the 2 nd region are adjacent to each other with a gap therebetween,
the 1 st path and the 2 nd path are opposed to each other with the gap therebetween,
an angle formed by a direction of a current flowing through the straight portion of the 1 st path and a direction of a current flowing through the straight portion of the 2 nd path is greater than or equal to 0 DEG and less than or equal to 10 DEG,
having a coupling portion coupling the 1 st region and the 2 nd region,
the coupling portion has a plurality of paths,
the plurality of paths are adjacent to each other,
the coupling portion is provided with a1 st beam and a 2 nd beam, the 1 st beam being obtained by collecting paths through which current flows from the 1 st region to the 2 nd region, and the 2 nd beam being obtained by collecting paths through which current flows from the 2 nd region to the 1 st region.
10. The wireless power supply apparatus according to claim 9,
the coupling part has a1 st coupling part and a 2 nd coupling part,
the current flows through the 1 st region, the 1 st coupling part, the 2 nd region, and the 2 nd coupling part in this order, and flows through a path to the 1 st region.
11. The wireless power supply apparatus according to claim 9,
the power transmission coil is fixed on a frame body of an air conditioner air regulator of the vehicle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018192961A JP2020061502A (en) | 2018-10-11 | 2018-10-11 | Power transmission coil and wireless power supply device |
| JP2018-192961 | 2018-10-11 |
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| Publication Number | Publication Date |
|---|---|
| CN111048298A CN111048298A (en) | 2020-04-21 |
| CN111048298B true CN111048298B (en) | 2021-12-24 |
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| CN201910962481.7A Active CN111048298B (en) | 2018-10-11 | 2019-10-11 | Power transmission coil and wireless power supply device |
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| Country | Link |
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| JP (1) | JP2020061502A (en) |
| CN (1) | CN111048298B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103975400A (en) * | 2011-11-18 | 2014-08-06 | 丰田自动车株式会社 | Power transmitting apparatus, power receiving apparatus, and power transmitting system |
| WO2015146889A1 (en) * | 2014-03-26 | 2015-10-01 | 株式会社エクォス・リサーチ | Power reception system |
| CN207895966U (en) * | 2015-05-28 | 2018-09-21 | 株式会社村田制作所 | Inductor module and electrical power transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19934767A1 (en) * | 1999-07-23 | 2001-01-25 | Philips Corp Intellectual Pty | Magnetic component |
| JP4415073B2 (en) * | 2000-04-06 | 2010-02-17 | 株式会社デンソー | Blowing grill structure of vehicle air conditioner |
| WO2009066433A1 (en) * | 2007-11-21 | 2009-05-28 | Panasonic Corporation | Coil component |
| JP2013021886A (en) * | 2011-07-14 | 2013-01-31 | Sony Corp | Power supply apparatus, power supply system, vehicle, and electronic apparatus |
| JP2013184586A (en) * | 2012-03-08 | 2013-09-19 | Nissan Motor Co Ltd | Contactless power supply device |
| JPWO2014196391A1 (en) * | 2013-06-06 | 2017-02-23 | ソニー株式会社 | Antenna and electronic device |
| JP6288449B2 (en) * | 2014-06-18 | 2018-03-07 | 豊田合成株式会社 | Air conditioner for vehicles |
| JP6572730B2 (en) * | 2014-12-25 | 2019-09-11 | 豊田合成株式会社 | Luminous interior products |
| JP6702896B2 (en) * | 2017-01-12 | 2020-06-03 | 株式会社豊田中央研究所 | Contactless power supply device and electric circuit module |
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2018
- 2018-10-11 JP JP2018192961A patent/JP2020061502A/en active Pending
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103975400A (en) * | 2011-11-18 | 2014-08-06 | 丰田自动车株式会社 | Power transmitting apparatus, power receiving apparatus, and power transmitting system |
| WO2015146889A1 (en) * | 2014-03-26 | 2015-10-01 | 株式会社エクォス・リサーチ | Power reception system |
| CN207895966U (en) * | 2015-05-28 | 2018-09-21 | 株式会社村田制作所 | Inductor module and electrical power transmission system |
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| CN111048298A (en) | 2020-04-21 |
| JP2020061502A (en) | 2020-04-16 |
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