Alternating magnetic field coupling system, magnetic field generating device and magnetic field receiving device

Abstract

The present application provides an alternating magnetic field coupling system, a magnetic field generating device and a magnetic field receiving device. The alternating magnetic field coupling system includes a magnetic field generating device and a magnetic field sensitive device. The magnetic field generating device and the magnetic field receiving device have a magnetic field sensitive device on at least one side. The magnetic field generating device is used to generate a first magnetic field, and the magnetic field sensitive device is located within the coverage of the first magnetic field. A protective component is arranged around the outer side of the magnetic field sensitive device, and the protective component generates a second magnetic field in the magnetic field sensitive device in the opposite direction to the first magnetic field. The alternating magnetic field coupling system, the magnetic field generating device and the magnetic field receiving device can reduce the intensity of the alternating magnetic field in the magnetic field sensitive device.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic technology, and in particular to an alternating magnetic field coupling system, a magnetic field generating device and a magnetic field receiving device. Background Art

[0002] With the continuous development of the field of electromagnetic technology, the contactless / wireless transmission of energy or information achieved by magnetic field coupling has outstanding convenience and has been applied in wireless charging, induction heating, communications and other fields.

[0003] Taking the wireless charging technology using electromagnetic induction technology as an example, during the wireless charging process, the transmitting coil in the magnetic field device that charges the powered device and the receiving coil in the powered device achieve wireless transmission of electric energy through magnetic field coupling.

[0004] However, one or more components contained in the powered device may also sense the magnetic field and generate induced current (i.e., eddy current effect), thereby generating eddy current loss, reducing the charging efficiency of the powered device, or being disturbed by the alternating magnetic field and unable to work normally.

[0005] For example, batteries in powered devices can generate eddy current losses. For another example, in some powered devices that include special functional components, these special functional components can also generate eddy current losses.

[0006] Take a smartwatch with a printed circuit board assembly (PCBA) equipped with heart rate and blood oxygen sensors as an example. During the wireless charging of the smartwatch by electromagnetic induction, the PCBA will generate large eddy current losses. Another example is a smartwatch with an alignment magnet for quickly and reliably aligning the charging position. During the charging process of the smartwatch, the alignment magnet will also generate large eddy current losses.

[0007] Therefore, how to reduce the magnetic field at the magnetic field sensitive device in the equipment to improve the working efficiency or reliability of the equipment has become a technical problem that needs to be solved urgently. Summary of the invention

[0008] The present application provides an alternating magnetic field coupling system, a magnetic field generating device and a magnetic field receiving device, which can reduce the magnetic field at a magnetic field sensitive device in the device to improve the working efficiency or reliability of the device.

[0009] In a first aspect, the present application provides an alternating magnetic field coupling system, comprising: a magnetic field generating device and a magnetic field sensitive device, the magnetic field generating device is used to generate a first magnetic field, the magnetic field sensitive device is a device that generates eddy current loss or alternating magnetic field interference due to the first magnetic field, and is located within the coverage of the first magnetic field; a protective component is arranged on the outside of the magnetic field sensitive device, and the protective component generates a second magnetic field in the magnetic field sensitive device that is opposite to the direction of the first magnetic field.

[0010] In this aspect, the magnetic field sensitive device will produce adverse effects during the operation of the alternating magnetic field coupling system, and the protection component can generate a magnetic field in the opposite direction to the first magnetic field, and through the superposition and cancellation of the magnetic fields, the purpose of weakening the magnetic field in the magnetic field sensitive device is achieved.

[0011] In combination with the first aspect, in a possible implementation manner, the alternating magnetic field coupling system further includes: a magnetic field receiving device; and a magnetic field sensitive device is present on at least one side of the magnetic field generating device and the magnetic field receiving device.

[0012] In this implementation, the alternating magnetic field coupling system also includes a magnetic field receiving device, which further limits the range of the magnetic field sensitive device.

[0013] In combination with the first aspect, in a possible implementation, the protection component is disposed on a first outer surface of the magnetic field sensitive device, and the direction of the first outer surface is perpendicular to a plane facing the magnetic field generating device and the magnetic field receiving device.

[0014] In this implementation, the protection component can be arranged on the first outer surface of the magnetic field sensitive device, so that the magnetic field intensity in the magnetic field sensitive device can be effectively reduced.

[0015] In combination with the first aspect, in a possible implementation, the protective component is also arranged in a first target area on the second outer surface of the magnetic field sensitive device, the second outer surface is the surface of the magnetic field sensitive device in the magnetic field generating device away from the magnetic field receiving device or the surface of the magnetic field sensitive device in the magnetic field receiving device away from the magnetic field generating device, and the first target area does not include an unshielded area on the second outer surface.

[0016] In this implementation, the protection component can also be set in a target area on the surface of the magnetic field sensitive device in the magnetic field generating device away from the magnetic field receiving device or on the surface of the magnetic field sensitive device in the magnetic field receiving device away from the magnetic field generating device, which can better offset the magnetic field strength in the magnetic field sensitive device.

[0017] In combination with the first aspect, in a possible implementation, the protective component is also arranged in a second target area on the third outer surface of the magnetic field sensitive device, the third outer surface being the surface of the magnetic field sensitive device in the magnetic field generating device close to the magnetic field receiving device or the surface of the magnetic field sensitive device in the magnetic field receiving device close to the magnetic field generating device, and the second target area does not include an unshielded area on the third outer surface.

[0018] In this implementation, the protection component can also be set in a target area on the surface of the magnetic field sensitive device in the magnetic field generating device close to the magnetic field receiving device or on the surface of the magnetic field sensitive device in the magnetic field receiving device close to the magnetic field generating device, so as to further effectively reduce the magnetic field strength at the magnetic field sensitive device while ensuring that the original function of the device is not restricted.

[0019] In combination with the first aspect, in a possible implementation method, when the magnetic field sensitive device is only located in the magnetic field generating device and there is an unshielded area on the third outer surface of the magnetic field sensitive device, a protective component is set in the area close to the third outer surface of the magnetic field receiving device; when the magnetic field sensitive device is only located in the magnetic field receiving device and there is an unshielded area on the third outer surface of the magnetic field sensitive device, a protective component is set in the area close to the third outer surface of the magnetic field generating device.

[0020] In this implementation, the protection component is split, with one part in the magnetic field generating device and the other part in the magnetic field receiving device. In this way, the split protection components can work together to better shield the magnetic field when the system is working without affecting the special functions of the alternating magnetic field coupling system.

[0021] In combination with the first aspect, in a possible implementation manner, the second magnetic field is generated based on the first magnetic field induction.

[0022] In this implementation, it is further defined that the protection component passively generates the second magnetic field based on the induction of the first magnetic field, which can reduce the complexity of the solution.

[0023] In combination with the first aspect, in a possible implementation manner, the protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

[0024] In this implementation, the use of high-conductivity metal materials can better construct an inductive loop around the magnetic field sensitive device, thereby generating a reverse magnetic field, thereby achieving the purpose of weakening the magnetic field in the magnetic field sensitive device; the use of high-conductivity metal with a thickness greater than the skin depth can ensure that the inductive loop has a high Q value, thereby avoiding large eddy current losses in the protective component itself.

[0025] In combination with the first aspect, in a possible implementation, the protection component includes a single-turn closed Litz wire, a multi-turn closed enameled wire, or a multi-turn closed Litz wire, wherein the turns of the multi-turn closed enameled wire or the multi-turn closed Litz wire are connected in series.

[0026] In this implementation, the skin effect on the protection component is effectively suppressed by using a single-turn closed shaped Litz wire, a multi-turn closed enameled wire or a multi-turn closed Litz wire, thereby further reducing the loss on the protection component.

[0027] In combination with the first aspect, in a possible implementation, the protection component further includes a capacitor, and the capacitor is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop.

[0028] In this implementation, by connecting a compensation capacitor in series with the protection component, the induced current can be increased, thereby enhancing the magnetic field shielding effect.

[0029] In the second aspect, the present application provides a magnetic field generating device, which is used to generate a first magnetic field received by a magnetic field receiving device. There is a magnetic field sensitive device on at least one side of the magnetic field generating device and the magnetic field receiving device. The magnetic field sensitive device is a device that generates eddy current loss or alternating magnetic field interference due to the first magnetic field. A protective component is provided in the magnetic field generating device, which is used to generate a second magnetic field in the magnetic field sensitive device that is opposite to the direction of the first magnetic field.

[0030] In this aspect, the magnetic field sensitive device will have an adverse effect during the operation of the magnetic field generating equipment, and the protection component can generate a magnetic field in the opposite direction to the first magnetic field, and through the superposition and cancellation of the magnetic fields, the purpose of weakening the magnetic field in the magnetic field sensitive device is achieved.

[0031] In combination with the second aspect, in a possible implementation, when there is a magnetic field sensitive device in the magnetic field generating device, the protective component is arranged on the first outer surface of the magnetic field sensitive device, and the direction of the first outer surface is perpendicular to the plane facing the magnetic field generating device and the magnetic field receiving device.

[0032] In this implementation, the protection component can be arranged on the first outer surface of the magnetic field sensitive device, so that the magnetic field intensity in the magnetic field sensitive device can be effectively reduced.

[0033] In combination with the second aspect, in a possible implementation, when there is a magnetic field sensitive device in the magnetic field generating device, the protective component is also arranged in a first target area on a second outer surface of the magnetic field sensitive device, the second outer surface being the surface of the magnetic field sensitive device in the magnetic field generating device away from the magnetic field receiving device, and the first target area does not include an unshielded area on the second outer surface.

[0034] In this implementation, the protection component may also be disposed in a target area on the magnetic field sensitive device in the magnetic field generating device, away from the surface of the magnetic field receiving device, to better offset the magnetic field intensity in the magnetic field sensitive device.

[0035] In combination with the second aspect, in a possible implementation, when there is a magnetic field sensitive device in the magnetic field generating device, the protective component is also arranged in a second target area on the third outer surface of the magnetic field sensitive device, and the third outer surface is the surface of the magnetic field sensitive device in the magnetic field generating device close to the magnetic field receiving device, and the second target area does not include an unshielded area on the third outer surface.

[0036] In this implementation, the protection component can also be set in a target area on the surface of the magnetic field sensitive device in the magnetic field generating device close to the magnetic field receiving device, further effectively reducing the magnetic field strength at the magnetic field sensitive device, while ensuring that the original function of the device is not restricted.

[0037] In combination with the second aspect, in a possible implementation, when the magnetic field sensitive device only exists in the magnetic field generating device and there is an unshielded area on the third outer surface of the magnetic field sensitive device, a protective component is provided in an area close to the third outer surface of the magnetic field receiving device.

[0038] In this implementation, the protection component is split, with one part in the magnetic field generating device and the other part in the magnetic field receiving device. In this way, when the magnetic field generating device is working, the split protection components can work together to better shield the magnetic field.

[0039] In a third aspect, the present application provides a magnetic field receiving device, which is used to receive a first magnetic field generated by a magnetic field generating device. A magnetic field sensitive device is present on at least one side of the magnetic field generating device and the magnetic field receiving device. The magnetic field sensitive device is a device that generates eddy current loss or alternating magnetic field interference due to the first magnetic field. A protective component is provided in the magnetic field receiving device, which is used to generate a second magnetic field in the magnetic field sensitive device in the opposite direction to the first magnetic field.

[0040] In this aspect, the magnetic field sensitive device will have an adverse effect on the operation of the magnetic field receiving device, and the protection component can generate a magnetic field in the opposite direction to the first magnetic field, and through the superposition and cancellation of the magnetic fields, the purpose of weakening the magnetic field in the magnetic field sensitive device is achieved.

[0041] In combination with the third aspect, in a possible implementation, when there is a magnetic field sensitive device in the magnetic field receiving device, the protective component is arranged on the first outer surface of the magnetic field sensitive device, and the direction of the first outer surface is perpendicular to the plane facing the magnetic field generating device and the magnetic field receiving device.

[0042] In this implementation, the protection component can be arranged on the first outer surface of the magnetic field sensitive device, so that the magnetic field intensity in the magnetic field sensitive device can be effectively reduced.

[0043] In combination with the third aspect, in a possible implementation, when there is a magnetic field sensitive device in the magnetic field receiving device, the protective component is also arranged in a first target area on the second outer surface of the magnetic field sensitive device, the second outer surface being the surface of the magnetic field sensitive device in the magnetic field receiving device away from the magnetic field generating device, and the first target area does not include an unshielded area on the second outer surface.

[0044] In this implementation, the protection component can also be arranged in a target area on the surface of the magnetic field sensitive device in the magnetic field receiving device, which is far away from the magnetic field generating device, so as to better offset the magnetic field strength in the magnetic field sensitive device.

[0045] In combination with the third aspect, in a possible implementation, when there is a magnetic field sensitive device in the magnetic field receiving device, the protective component is also arranged in a second target area on the third outer surface of the magnetic field sensitive device, and the third outer surface is the surface of the magnetic field sensitive device in the magnetic field receiving device close to the magnetic field generating device, and the second target area does not include an unshielded area on the third outer surface.

[0046] In this implementation, the protection component can also be set in a target area on the surface of the magnetic field sensitive device in the magnetic field receiving device close to the magnetic field generating device, further effectively reducing the magnetic field strength at the magnetic field sensitive device, while ensuring that the original function of the device is not restricted.

[0047] In combination with the third aspect, in a possible implementation, when the magnetic field sensitive device only exists in the magnetic field receiving device and there is an unshielded area on the third outer surface of the magnetic field sensitive device, a protective component is set in the area close to the third outer surface of the magnetic field generating device.

[0048] In this implementation, the protection component is split, with one part in the magnetic field generating device and the other part in the magnetic field receiving device. In this way, the split protection components can work together to better shield the magnetic field when the system is working without affecting the special functions of the alternating magnetic field coupling system.

[0049] In combination with the second aspect or the third aspect, in a possible implementation manner, the second magnetic field is generated based on the first magnetic field induction.

[0050] In this implementation, it is further defined that the protection component passively generates the second magnetic field based on the induction of the first magnetic field, which can reduce the complexity of the solution.

[0051] In combination with the second aspect or the third aspect, in a possible implementation manner, the protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

[0052] In this implementation, the use of high-conductivity metal materials can better construct an inductive loop around the magnetic field sensitive device, thereby generating a reverse magnetic field, thereby achieving the purpose of weakening the magnetic field in the magnetic field sensitive device; the use of high-conductivity metal with a thickness greater than the skin depth can ensure that the inductive loop has a high Q value, thereby avoiding large eddy current losses in the protective component itself.

[0053] In combination with the second aspect or the third aspect, in a possible implementation, the protection component includes a single-turn closed Litz wire, multiple turns of closed enameled wire, or multiple turns of closed Litz wire, wherein the turns of the multiple turns of closed enameled wire or the multiple turns of closed Litz wire are connected in series.

[0054] In this implementation, the skin effect on the protection component is effectively suppressed by using a single-turn closed shaped Litz wire, a multi-turn closed enameled wire or a multi-turn closed Litz wire, thereby further reducing the loss on the protection component.

[0055] In combination with the second aspect or the third aspect, in a possible implementation, the protection component further includes a capacitor, and the capacitor is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop.

[0056] In this implementation, by connecting a compensation capacitor in series with the protection component, the induced current can be increased, thereby enhancing the magnetic field shielding effect.

[0057] In a fourth aspect, the present application provides an electronic system for wireless charging, the system comprising: a power supply device and a powered device, the power supply device comprising a transmitting coil, the powered device comprising a receiving coil and a first magnetically sensitive component, the first magnetically sensitive component comprising a component that generates eddy current loss or is interfered by an alternating magnetic field during the process of the power supply device charging the powered device; the transmitting coil and the receiving coil are used to realize wireless transmission of electric energy through magnetic field coupling and generate a first magnetic field during the process of the power supply device charging the powered device; the receiving coil generates a first induced current based on electromagnetic induction, and the first induced current is used to provide electric energy to the powered device; wherein the powered device also comprises a first protective component, the first protective component is used to generate a second magnetic field in a first area during the process of the power supply device charging the powered device, and the magnetic field direction of the second magnetic field in the first area is opposite to the magnetic field direction of the first magnetic field in the first area.

[0058] In this aspect, the powered device in the wireless charging electronic system includes a first magnetically sensitive component and a first protective component. The first magnetically sensitive component will have an adverse effect in the process of the power supply device charging the powered device, while the first protective component can generate a magnetic field in the opposite direction to the first magnetic field. By superimposing and offsetting the magnetic fields, the purpose of weakening the magnetic field in the middle of the coil is achieved, thereby reducing the magnetic field strength of the first magnetically sensitive component, and ultimately improving the charging efficiency of the powered device.

[0059] In combination with the fourth aspect, in a possible implementation, when the first protection component generates a second magnetic field in the first area during the process of the power supply device charging the powered device, the first protection component is specifically used to: generate a second induced current based on the first magnetic field induction, and the second induced current is used to generate a second magnetic field in the first area.

[0060] In this implementation, it is further defined that the first protection component passively generates a magnetic field based on the first magnetic field induction, which can reduce the complexity of the solution and the complexity of the powered device.

[0061] In combination with the fourth aspect, in a possible implementation, the first magnetically sensitive component is located in a first space surrounded by the receiving coil; the first protective component is arranged on a first outer surface of the first magnetically sensitive component, and the direction of the first outer surface is parallel to the magnetic field direction of the first magnetic field in the first space.

[0062] In this implementation, when the first magnetically sensitive component is located in the space surrounded by the receiving coil, the first protective component can be arranged on the outer surface of the edge of the first magnetically sensitive component, thereby effectively reducing the magnetic field strength in the middle of the coil.

[0063] In combination with the fourth aspect, in a possible implementation, the first protection component is also arranged in a first target area on the second outer surface of the first magnetically sensitive component, the second outer surface is the surface of the first magnetically sensitive component away from the power supply device, and the first target area does not include an unshielded area on the second outer surface.

[0064] In this implementation, the first protection component may also be disposed on the first magnetically sensitive component in a target area away from the surface of the power supply device, which may better offset the magnetic field in the middle of the coil.

[0065] In combination with the fourth aspect, in a possible implementation, the first protection component is also arranged in a second target area on the third outer surface of the first magnetically sensitive component, the third outer surface is the surface of the first magnetically sensitive component close to the power supply device, and the second target area does not include an unblockable area on the third outer surface.

[0066] In this implementation, the first protection component can also be arranged on a target area on the first magnetically sensitive component close to the surface of the power supply device, further effectively reducing the magnetic field strength at the first magnetically sensitive component, while ensuring that the original function of the powered device is not restricted.

[0067] In combination with the fourth aspect, in a possible implementation manner, the first magnetically sensitive component includes at least one of the following devices: a magnet, a printed circuit board assembly PCBA, a battery, a sensor, and a structural component.

[0068] This implementation can effectively avoid eddy current losses caused by components such as magnets, PCBAs, batteries, sensors or structural parts.

[0069] In combination with the fourth aspect, in a possible implementation manner, the first protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

[0070] In this implementation, the use of high-conductivity metal materials can better construct an inductive loop around the first magnetically sensitive component, thereby generating a reverse magnetic field, thereby achieving the purpose of weakening the magnetic field in the middle of the coil; the use of high-conductivity metal with a thickness greater than the skin depth can ensure that the inductive loop has a high Q value, thereby avoiding large eddy current losses in the protective component itself.

[0071] In combination with the fourth aspect, in a possible implementation, the first protection component includes a single-turn closed shaped Litz wire, a multi-turn closed enameled wire, or a multi-turn closed Litz wire, wherein the turns of the multi-turn closed enameled wire are connected in series.

[0072] In this implementation, the skin effect on the first protection component is effectively suppressed by using a single-turn closed shaped Litz wire, multiple turns of closed enameled wire or multiple turns of closed Litz wire, thereby further reducing the eddy current loss on the first protection component.

[0073] In combination with the fourth aspect, in a possible implementation manner, the first protection component includes a plurality of turns of closed Litz wire, and each turn of the plurality of turns of closed Litz wire is connected in series.

[0074] In this implementation, multiple turns of closed Litz wire are connected in series, which can suppress the skin effect between strands and turns at the same time, achieving a better shielding effect.

[0075] In combination with the fourth aspect, in a possible implementation, the first protection component further includes a capacitor, and the capacitor is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop.

[0076] In this implementation, by connecting a compensation capacitor in series with the protection component formed by the coil, the induced current can be increased, thereby enhancing the magnetic field shielding effect.

[0077] In combination with the fourth aspect, in a possible implementation manner, the power supply device further includes a second protection component, and when the power supply device charges the powered device, the second protection component and the first protection component jointly generate a second magnetic field in the first area.

[0078] In this implementation, the protection component can be split, with one part in the power supply device and the other part in the powered device. In this way, when the power supply device charges the powered device, the split protection components can work together to better shield the magnetic field without affecting the special functions of the powered device.

[0079] In combination with the fourth aspect, in a possible implementation, the power supply device also includes a second magnetically sensitive component, which includes a component that generates eddy current loss or is interfered by an alternating magnetic field when the power supply device charges the powered device; the second protection component is also used to generate a third magnetic field in the second region when the power supply device charges the powered device, and the magnetic field direction of the third magnetic field in the second region is opposite to the magnetic field direction of the first magnetic field in the second region.

[0080] In this implementation, the power supply device in the wireless charging electronic system also includes a second magnetically sensitive component and a second protective component. The second magnetically sensitive component will have an adverse effect in the process of the power supply device charging the powered device, and the second protective component can generate a magnetic field in the opposite direction to the first magnetic field. Through the superposition and cancellation of the magnetic fields, the purpose of weakening the magnetic field in the middle of the coil is achieved, thereby reducing the magnetic field strength of the second magnetically sensitive component, and ultimately improving the charging efficiency of the powered device.

[0081] In combination with the fourth aspect, in a possible implementation, when the second protection component generates a third magnetic field in the second area during the process of the power supply device charging the powered device, the second protection component is specifically used to: generate a third induced current based on the first magnetic field induction, and the third induced current is used to generate a third magnetic field in the second area.

[0082] In this implementation, the second protection component generates the third magnetic field because it is induced by the first magnetic field, generates a third induced current, and then generates the third magnetic field, thereby reducing the complexity of the power supply device.

[0083] In combination with the fourth aspect, in a possible implementation, the second magnetically sensitive component is located in a second space surrounded by the transmitting coil; the second protective component is arranged on a fourth outer surface of the second magnetically sensitive component, and the direction of the fourth outer surface is parallel to the magnetic field direction of the first magnetic field in the second space.

[0084] In this implementation, a closed-loop protection component can be provided on the outer surface of the edge of the second magnetically sensitive component. During the process of the power supply device charging the powered device, the influence of a portion of the magnetic field on the second magnetically sensitive component can be shielded, thereby reducing the magnetic field strength of the second magnetically sensitive component.

[0085] In combination with the fourth aspect, in a possible implementation, the second protection component is also arranged in a third target area of ​​the fifth outer surface of the second magnetically sensitive component, the fifth outer surface is the surface of the second magnetically sensitive component away from the powered device, and the third target area does not include an unblockable area on the fifth outer surface.

[0086] In this implementation, the second protection component may also be disposed on the second magnetically sensitive component in a target area away from the surface of the powered device, to further shield the first magnetic field.

[0087] In combination with the fourth aspect, in a possible implementation, the second protection component is also arranged in a fourth target area on the sixth outer surface of the second magnetically sensitive component, the sixth outer surface is the surface of the second magnetically sensitive component close to the powered device, and the fourth target area does not include an unblockable area on the sixth outer surface.

[0088] In this implementation, the second protection component may also be disposed on the second magnetically sensitive component in a target area close to the surface of the powered device, so as to further achieve the purpose of better shielding the first magnetic field.

[0089] In combination with the fourth aspect, in a possible implementation manner, the second magnetically sensitive component includes at least one of the following devices: a magnet, a printed circuit board assembly PCBA, a battery, a sensor, and a structural component.

[0090] This implementation can effectively avoid eddy current losses caused by components such as magnets, PCBAs, batteries, sensors or structural parts.

[0091] In combination with the fourth aspect, in a possible implementation manner, the second protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

[0092] In this implementation, the use of high-conductivity metal materials can better construct an inductive loop around the second magnetically sensitive component, thereby generating a reverse magnetic field, thereby achieving the purpose of weakening the magnetic field in the middle of the coil; the use of high-conductivity metal with a thickness greater than the skin depth can ensure that the inductive loop has a high Q value, thereby avoiding large eddy current losses in the protective component itself.

[0093] In combination with the fourth aspect, in a possible implementation, the second protection component includes a single-turn closed shaped Litz wire, a multi-turn closed enameled wire, or a multi-turn closed Litz wire, wherein the turns of the multi-turn closed enameled wire are connected in series.

[0094] In this implementation, the skin effect on the protection component is effectively suppressed by using a single-turn closed shaped Litz wire, a multi-turn closed enameled wire or a multi-turn closed Litz wire, thereby further reducing the loss on the protection component.

[0095] In combination with the fourth aspect, in a possible implementation, the second protection component further includes a capacitor, and the capacitor in the second protection component is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop in the second protection component.

[0096] In this implementation, by connecting a compensation capacitor in series with the protection component formed by the coil, the induced current can be increased, thereby enhancing the magnetic field shielding effect.

[0097] In conjunction with the fourth aspect, in a possible implementation, the powered device includes a smart watch, a smart phone, or a tablet computer.

[0098] This implementation can reduce eddy current losses in smart watches, smartphones or tablets.

[0099] In a fifth aspect, the present application provides a wirelessly charged powered device, which is powered by a power supply device, the power supply device including a transmitting coil, the powered device including a receiving coil and a first magnetically sensitive component, the first magnetically sensitive component including a component that generates eddy current loss or is interfered by an alternating magnetic field during the process of the power supply device charging the powered device; the transmitting coil and the receiving coil realize wireless transmission of electric energy through magnetic field coupling during the process of the power supply device charging the powered device, and generate a first magnetic field; the receiving coil generates a first induced current based on electromagnetic induction, and the first induced current is used to provide electric energy to the powered device; wherein the powered device also includes a first protective component, the first protective component is used to generate a second magnetic field in a first area during the process of the power supply device charging the powered device, and the magnetic field direction of the second magnetic field in the first area is opposite to the magnetic field direction of the first magnetic field in the first area.

[0100] In this aspect, the wirelessly charged powered device includes a first magnetically sensitive component and a first protective component. The first magnetically sensitive component will have an adverse effect when the power supply device is charging the powered device, while the first protective component can generate a magnetic field in the opposite direction to the first magnetic field. By superimposing and offsetting the magnetic fields, the purpose of weakening the magnetic field in the middle of the coil is achieved, thereby reducing the magnetic field strength of the first magnetically sensitive component, and ultimately improving the charging efficiency of the powered device.

[0101] In combination with the fifth aspect, in a possible implementation, when the first protection component generates a second magnetic field in the first area during the process of the power supply device charging the powered device, the first protection component is specifically used to: generate a second induced current based on the first magnetic field induction, and the second induced current is used to generate a second magnetic field in the first area.

[0102] In this implementation, it is further defined that the first protection component passively generates a magnetic field based on the first magnetic field induction, thereby reducing the complexity of the solution and the complexity of the powered device.

[0103] In combination with the fifth aspect, in a possible implementation, the first magnetically sensitive component is located in a first space surrounded by the receiving coil; the first protective component is arranged on a first outer surface of the first magnetically sensitive component, and the direction of the first outer surface is parallel to the magnetic field direction of the first magnetic field in the first space.

[0104] In this implementation, when the first magnetically sensitive component is located in the space surrounded by the receiving coil, the first protective component can be arranged on the outer surface of the edge of the first magnetically sensitive component, thereby effectively reducing the magnetic field strength in the middle of the coil.

[0105] In combination with the fifth aspect, in a possible implementation, the first protection component is also arranged in a first target area on the second outer surface of the first magnetically sensitive component, the second outer surface is the surface of the first magnetically sensitive component away from the power supply device, and the first target area does not include an unshielded area on the second outer surface.

[0106] In this implementation, the first protection component may also be disposed on the first magnetically sensitive component in a target area away from the surface of the power supply device, which may better offset the magnetic field in the middle of the coil.

[0107] In combination with the fifth aspect, in a possible implementation, the first protection component is also arranged in a second target area on the third outer surface of the first magnetically sensitive component, the third outer surface is the surface of the first magnetically sensitive component close to the power supply device, and the second target area does not include an unshielded area on the third outer surface.

[0108] In this implementation, the first protection component can also be arranged on a target area on the first magnetically sensitive component close to the surface of the power supply device, further effectively reducing the magnetic field strength at the first magnetically sensitive component, while ensuring that the original function of the powered device is not restricted.

[0109] In combination with the fifth aspect, in a possible implementation manner, the first magnetically sensitive component includes at least one of the following devices: a magnet, a printed circuit board assembly PCBA, a battery, a sensor, and a structural component.

[0110] This implementation can effectively avoid eddy current losses caused by components such as magnets, PCBAs, batteries, sensors or structural parts.

[0111] In combination with the fifth aspect, in a possible implementation manner, the first protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

[0112] In this implementation, the use of high-conductivity metal materials can better construct an inductive loop around the first magnetically sensitive component, thereby generating a reverse magnetic field, thereby achieving the purpose of weakening the magnetic field in the middle of the coil; the use of high-conductivity metal with a thickness greater than the skin depth can ensure that the inductive loop has a high Q value, thereby avoiding large eddy current losses in the protective component itself.

[0113] In combination with the fifth aspect, in a possible implementation, the first protection component includes a single-turn closed shaped Litz wire, a multi-turn closed enameled wire, or a multi-turn closed Litz wire, wherein the turns of the multi-turn closed enameled wire are connected in series.

[0114] In this implementation, the skin effect on the first protection component is effectively suppressed by using a single-turn closed shaped Litz wire, multiple turns of closed enameled wire or multiple turns of closed Litz wire, thereby further reducing the eddy current loss on the first protection component.

[0115] In combination with the fifth aspect, in a possible implementation, the first protection component includes a plurality of turns of closed Litz wire, and each turn of the plurality of turns of closed Litz wire is connected in series.

[0116] In this implementation, multiple turns of closed enameled wire or multiple turns of closed Litz wire are connected in series to achieve a better shielding effect.

[0117] In combination with the fifth aspect, in a possible implementation, the first protection component also includes a capacitor, and the capacitor is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop.

[0118] In this implementation, by connecting a compensation capacitor in series with the protection component formed by the coil, the induced current can be increased, thereby enhancing the magnetic field shielding effect.

[0119] In combination with the fifth aspect, in a possible implementation manner, the power supply device further includes a second protection component, and when the power supply device charges the powered device, the second protection component and the first protection component jointly generate a second magnetic field in the first area.

[0120] In this implementation, the protection component can be split, with one part in the power supply device and the other part in the powered device. In this way, when the power supply device charges the powered device, the split protection components can work together to better shield the magnetic field without affecting the special functions of the powered device.

[0121] In conjunction with the fifth aspect, in a possible implementation, the powered device includes a smart watch, a smart phone, or a tablet computer.

[0122] This implementation can reduce eddy current losses in smart watches, smartphones or tablets.

[0123] In a sixth aspect, the present application provides a wireless charging power supply device, which is used to power a powered device, the power supply device includes a transmitting coil, the powered device includes a receiving coil and a first magnetically sensitive component, the first magnetically sensitive component includes a component that generates eddy current loss or is interfered by an alternating magnetic field during the process of the power supply device charging the powered device; the transmitting coil and the receiving coil realize wireless transmission of electric energy through magnetic field coupling during the process of the power supply device charging the powered device, and generate a first magnetic field; the receiving coil generates a first induced current based on electromagnetic induction, and the first induced current is used to provide electric energy to the powered device; wherein the powered device also includes a first protection component, the first protection component is used to generate a second magnetic field in a first area during the process of the power supply device charging the powered device, and the magnetic field direction of the second magnetic field in the first area is opposite to the magnetic field direction of the first magnetic field in the first area; the power supply device also includes a second protection component, when the power supply device charges the powered device, the second protection component and the first protection component jointly generate a second magnetic field in the first area.

[0124] In this aspect, the wireless charging power supply device also includes a second protection component. The second protection component and the first protection component can jointly generate a second magnetic field in the first area when the power supply device charges the powered device, thereby achieving the purpose of better shielding the magnetic field.

[0125] In combination with the sixth aspect, in a possible implementation, the power supply device also includes a second magnetically sensitive component, which includes a component that generates eddy current loss or is interfered by an alternating magnetic field during the process of the power supply device charging the powered device; the second protection component is also used to generate a third magnetic field in the second region during the process of the power supply device charging the powered device, and the magnetic field direction of the third magnetic field in the second region is opposite to the magnetic field direction of the first magnetic field in the second region.

[0126] In this implementation, the wireless charging power supply device also includes a second magnetically sensitive component. The second magnetically sensitive component will have an adverse effect when the power supply device is charging the powered device. The second protective component can generate a magnetic field in the opposite direction to the first magnetic field. By superimposing and offsetting the magnetic fields, the purpose of weakening the magnetic field in the middle of the coil is achieved, thereby reducing the magnetic field strength of the second magnetically sensitive component, and ultimately improving the charging efficiency of the powered device.

[0127] In combination with the sixth aspect, in a possible implementation, when the second protection component generates a third magnetic field in the second area during the process of the power supply device charging the powered device, the second protection component is specifically used to: generate a third induced current based on the first magnetic field induction, and the third induced current is used to generate a third magnetic field in the second area.

[0128] In this implementation, the second protection component generates the third magnetic field because it is induced by the first magnetic field, generates a third induced current, and then generates the third magnetic field, thereby reducing the complexity of the power supply device.

[0129] In combination with the sixth aspect, in a possible implementation, the second magnetically sensitive component is located in a second space surrounded by the transmitting coil; the second protective component is arranged on a fourth outer surface of the second magnetically sensitive component, and the direction of the fourth outer surface is parallel to the magnetic field direction of the first magnetic field in the second space.

[0130] In this implementation, a closed-loop protection component can be provided on the outer edge surface of the second magnetically sensitive component. During the process of the power supply device charging the powered device, the influence of a portion of the magnetic field on the second magnetically sensitive component can be shielded, thereby reducing the eddy current loss of the second magnetically sensitive component.

[0131] In combination with the sixth aspect, in a possible implementation, the second protection component is also arranged in a third target area of ​​the fifth outer surface of the second magnetically sensitive component, the fifth outer surface is the surface of the second magnetically sensitive component away from the powered device, and the third target area does not include an unblockable area on the fifth outer surface.

[0132] In this implementation, the second protection component may also be disposed on the second magnetically sensitive component in a target area away from the surface of the powered device, to further shield the first magnetic field.

[0133] In combination with the sixth aspect, in a possible implementation, the second protection component is also arranged in a fourth target area on the sixth outer surface of the second magnetically sensitive component, the sixth outer surface is the surface of the second magnetically sensitive component close to the powered device, and the fourth target area does not include an unblockable area on the sixth outer surface.

[0134] In this implementation, the second protection component may also be disposed on the second magnetically sensitive component in a target area close to the surface of the powered device, so as to further achieve the purpose of better shielding the first magnetic field.

[0135] In combination with the sixth aspect, in a possible implementation, the second magnetically sensitive component includes at least one of the following devices: a magnet, a printed circuit board assembly PCBA, a battery, a sensor, and a structural component.

[0136] This implementation can effectively avoid eddy current losses caused by components such as magnets, PCBAs, batteries, sensors or structural parts.

[0137] In combination with the sixth aspect, in a possible implementation, the second protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

[0138] In this implementation, the use of high-conductivity metal materials can better construct an inductive loop around the second magnetically sensitive component, thereby generating a reverse magnetic field, thereby achieving the purpose of weakening the magnetic field in the middle of the coil; the use of high-conductivity metal with a thickness greater than the skin depth can ensure that the inductive loop has a high Q value, thereby avoiding large eddy current losses in the protective component itself.

[0139] In combination with the sixth aspect, in a possible implementation, the second protection component includes a single-turn closed shaped Litz wire, multiple turns of closed enameled wire or multiple turns of closed Litz wire, wherein the turns of the multiple turns of closed enameled wire or the multiple turns of closed Litz wire are connected in series.

[0140] In this implementation, the skin effect on the protection component is effectively suppressed by using a single-turn closed shaped Litz wire, a multi-turn closed enameled wire or a multi-turn closed Litz wire, thereby further reducing the loss on the protection component.

[0141] In combination with the sixth aspect, in a possible implementation, the second protection component further includes a capacitor, and the capacitor in the second protection component is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop in the second protection component.

[0142] In this implementation, by connecting a compensation capacitor in series with the protection component formed by the coil, the induced current can be increased, thereby enhancing the magnetic field shielding effect.

[0143] In the seventh aspect, the present application provides a magnetized device, which is powered by a magnetization supply device, the magnetization supply device includes a transmitting coil, the magnetized device includes a receiving coil and a first magnetically sensitive component, the first magnetically sensitive component includes a component that generates eddy current loss or is interfered by an alternating magnetic field when the magnetization supply device supplies power to the magnetized device; the transmitting coil and the receiving coil realize wireless transmission of electric energy through magnetic field coupling when the magnetization supply device supplies power to the magnetized device, and generate a first magnetic field; the receiving coil generates a first induced current based on electromagnetic induction, and the first induced current is used to provide energy to the magnetized device; wherein the magnetized device also includes a first protective component, the first protective component is used to generate a second magnetic field in a first region when the magnetization supply device supplies power to the magnetized device, and the magnetic field direction of the second magnetic field in the first region is opposite to the magnetic field direction of the first magnetic field in the first region.

[0144] In combination with the seventh aspect, in a possible implementation, when the first protection component generates a second magnetic field in the first area during the process of the magnetic supply device supplying energy to the magnetic receiving device, it is specifically used to: generate a second induced current based on the first magnetic field induction, and the second induced current is used to generate a second magnetic field in the first area.

[0145] In combination with the seventh aspect, in a possible implementation, the first magnetically sensitive component is located in a first space surrounded by the receiving coil; the first protective component is arranged on a first outer surface of the first magnetically sensitive component, and the direction of the first outer surface is parallel to the magnetic field direction of the first magnetic field in the first space.

[0146] In combination with the seventh aspect, in a possible implementation, the first protective component is also arranged in a first target area on the second outer surface of the first magnetically sensitive component, the second outer surface is the surface of the first magnetically sensitive component away from the magnetic supply device, and the first target area does not include an unshielded area on the second outer surface.

[0147] In combination with the seventh aspect, in a possible implementation, the first protective component is also arranged in a second target area on the third outer surface of the first magnetically sensitive component, the third outer surface is the surface of the first magnetically sensitive component close to the magnetic supply device, and the second target area does not include an unblockable area on the third outer surface.

[0148] In combination with the seventh aspect, in a possible implementation, the first magnetically sensitive component includes at least one of the following devices: a magnet, a printed circuit board assembly PCBA, a battery, a sensor, and a structural component.

[0149] In combination with the seventh aspect, in a possible implementation, the first protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

[0150] In combination with the seventh aspect, in a possible implementation, the first protection component includes a single-turn closed shaped Litz wire, a multi-turn closed enameled wire, or a multi-turn closed Litz wire, wherein the turns of the multi-turn closed enameled wire are connected in series.

[0151] In combination with the seventh aspect, in a possible implementation, the first protection component includes a plurality of turns of closed Litz wire, and each turn of the plurality of turns of closed Litz wire is connected in series.

[0152] In combination with the seventh aspect, in a possible implementation, the first protection component also includes a capacitor, and the capacitor is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop.

[0153] In combination with the seventh aspect, in a possible implementation, the magnetization supply device further includes a second protection component, and when the magnetization supply device supplies energy to the magnetized device, the second protection component and the first protection component jointly generate a second magnetic field in the first region.

[0154] In combination with the seventh aspect, in a possible implementation, the magnetized device includes a heated device.

[0155] In an eighth aspect, the present application provides a magnetic supply device, which is used to supply energy to a first device through a magnetic field. The magnetic supply device includes a transmitting coil, and the first device includes a first magnetically sensitive component, and the first magnetically sensitive component includes a component that generates eddy current loss or is interfered by an alternating magnetic field in the process of the magnetic supply device supplying energy to the first device; the transmitting coil realizes wireless transmission of electric energy through magnetic field coupling and generates a first magnetic field in the process of the magnetic supply device supplying energy to the first device; wherein the first device also includes a first protection component, and the first protection component is used to generate a second magnetic field in a first area in the process of the magnetic supply device supplying energy to the first device, and the magnetic field direction of the second magnetic field in the first area is opposite to the magnetic field direction of the first magnetic field in the first area; the magnetic supply device also includes a second protection component, and when the magnetic supply device supplies energy to the first device, the second protection component and the first protection component jointly generate a second magnetic field in the first area.

[0156] In combination with the eighth aspect, in a possible implementation, the magnetic supply device also includes a second magnetically sensitive component, which includes a component that generates eddy current loss or is interfered by an alternating magnetic field when the magnetic supply device supplies power to the first device; the second protective component is also used to generate a third magnetic field in the second region when the magnetic supply device supplies power to the first device, and the magnetic field direction of the third magnetic field in the second region is opposite to the magnetic field direction of the first magnetic field in the second region.

[0157] In combination with the eighth aspect, in a possible implementation, when the second protection component generates a third magnetic field in the second area during the process of the magnetic supply device supplying power to the first device, it is specifically used to: generate a third induced current based on the first magnetic field induction, and the third induced current is used to generate a third magnetic field in the second area.

[0158] In combination with the eighth aspect, in a possible implementation, the second magnetically sensitive component is located in a second space surrounded by the transmitting coil; the second protective component is arranged on a fourth outer surface of the second magnetically sensitive component, and the direction of the fourth outer surface is parallel to the magnetic field direction of the first magnetic field in the second space.

[0159] In combination with the eighth aspect, in a possible implementation, the second protective component is also arranged in a third target area of ​​the fifth outer surface of the second magnetically sensitive component, the fifth outer surface is the surface of the second magnetically sensitive component away from the first device, and the third target area does not include an unblockable area on the fifth outer surface.

[0160] In combination with the eighth aspect, in a possible implementation, the second protective component is also arranged in a fourth target area on the sixth outer surface of the second magnetically sensitive component, the sixth outer surface is the surface of the second magnetically sensitive component close to the first device, and the fourth target area does not include an unblockable area on the sixth outer surface.

[0161] In combination with the eighth aspect, in a possible implementation, the second magnetically sensitive component includes at least one of the following devices: a magnet, a printed circuit board assembly PCBA, a battery, a sensor, and a structural component.

[0162] In combination with the eighth aspect, in a possible implementation, the second protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

[0163] In combination with the eighth aspect, in a possible implementation, the second protection component includes a single-turn closed shaped Litz wire, a multi-turn closed enameled wire, or a multi-turn closed Litz wire, wherein the turns of the multi-turn closed enameled wire are connected in series.

[0164] In combination with the eighth aspect, in a possible implementation, the second protection component includes multiple turns of closed enameled wire or multiple turns of closed Litz wire, and the multiple turns of closed enameled wire in the second protection component or the multiple turns of closed Litz wire in the second protection component are connected in series.

[0165] In combination with the eighth aspect, in a possible implementation, the second protection component further includes a capacitor, and the capacitor in the second protection component is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop in the second protection component.

[0166] In the ninth aspect, the present application provides a magnetic field electronic system, which includes the magnetized device in the seventh aspect or any possible implementation thereof and the magnetization device in the eighth aspect or any possible implementation thereof, and the magnetization device is used to supply energy to the magnetized device.

[0167] In combination with the ninth aspect, in a possible implementation, the magnetic field electronic system includes any one of the following: an electronic system for wireless charging and an electronic system for induction heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0168] Figure 1 A schematic diagram of an application scenario taking a wireless charging scenario as an example provided by an embodiment of the present application;

[0169] Figure 2 A cross-sectional schematic diagram of an alternating magnetic field coupling system provided by one embodiment of the present application;

[0170] Figure 3 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 1 ;

[0171] Figure 4 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 2 ;

[0172] Figure 5A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 3 ;

[0173] Figure 6 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 4 ;

[0174] Figure 7 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 5 ;

[0175] Figure 8 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 6 ;

[0176] Fig. 9 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 7 ;

[0177] Fig.10 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 8 ;

[0178] Fig.11 A schematic diagram of a structure in which a protection component provided in one embodiment of the present application is composed of a coil;

[0179] Fig.12 A schematic diagram of a structure in which a protection component provided in one embodiment of the present application is composed of a coil and a capacitor is connected in series to the coil;

[0180] Fig.13 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 9 ;

[0181] Fig.14 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 10 ;

[0182] Fig.15 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 10 one;

[0183] Fig.16 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 10 two;

[0184] Fig.17 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 10 three;

[0185] Fig.18 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 10 Four;

[0186] Fig.19 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 10 five;

[0187] Fig. 20 A cross-sectional view of a wireless charging electronic system provided by an embodiment of the present application Figure 10 six. DETAILED DESCRIPTION

[0188] The implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0189] With the continuous development of the field of electromagnetic technology, the contactless / wireless transmission of energy or information achieved by magnetic field coupling has outstanding convenience and has been applied in wireless charging, induction heating, communications and other fields.

[0190] Taking the wireless charging technology using electromagnetic induction technology as an example, during the wireless charging process, the transmitting coil in the power supply device that charges the powered device converts the high-frequency AC signal into a magnetic field. The receiving coil in the powered device converts the magnetic field into electrical energy after inducing it, and then uses it to charge the battery of the powered device.

[0191] Figure 1 This is a schematic diagram of an application scenario using a wireless charging scenario as an example provided by an embodiment of the present application. Figure 1 As shown, the scene includes a powered device 101 and a power supply device 102, and the power supply device 102 is used to wirelessly charge the powered device 101. The powered device 101 includes a receiving coil 1011 and a first magnetic sensitive component 1012, and the power supply device 102 includes a transmitting coil 1021 and a second magnetic sensitive component 1022, wherein the first magnetic sensitive component 1012 is located in the middle of the receiving coil 1011, and the second magnetic sensitive component 1022 is located in the middle of the transmitting coil 1021.

[0192] When the power supply device 102 charges the powered device 101 , the transmitting coil 1021 and the receiving coil 1011 realize wireless power transmission through magnetic field coupling, and the receiving coil 1011 generates an induced current based on electromagnetic induction to provide power to the powered device 101 .

[0193] Optionally, the first magnetically sensitive component 101 and the second magnetically sensitive component 102 may be components that are prone to eddy current loss or are easily disturbed by an alternating magnetic field, such as batteries, magnets, some PCBAs with special functions, sensors and / or structural parts.

[0194] Optionally, in some scenarios, the first magnetically sensitive component 101 and the second magnetically sensitive component 102 may not exist or only one of them may exist.

[0195] However, taking the powered device 101 as an example, when the first magnetic sensitive component 1012 in the powered device 101 exists, the first magnetic sensitive component 1012 may sense the magnetic field and generate eddy current loss, thereby reducing the charging efficiency of the powered device.

[0196] For example, when the powered device 101 is a smart watch, and the first magnetic sensitive component 1012 is a PCBA of a heart rate, blood oxygen and other sensors, the PCBA will generate large eddy current losses during the wireless charging of the smart watch by electromagnetic induction. When the powered device 101 is a smart watch, and the first magnetic sensitive component 1012 is a positioning magnet for quickly and reliably aligning the charging position, the positioning magnet will also generate large eddy current losses during the charging process of the smart watch.

[0197] In the current related technologies, in order to reduce the eddy current loss on the corresponding components, the relevant technicians in this field have proposed a method of deploying soft magnetic materials around the components that generate eddy current loss or are susceptible to alternating magnetic field interference, so that most of the magnetic lines of force gather and pass through the soft magnetic material instead of the metal layer, thereby reducing the magnetic field strength in the middle of the coil and reducing heat. However, the existing scheme of using soft magnetic materials to shield the magnetic field in the middle of the coil has poor shielding effect in compact applications; and if the static magnetic field generated by the alignment magnet is prone to magnetic saturation, the shielding effect will be further deteriorated, and even completely ineffective in extreme cases.

[0198] Therefore, how to reduce the magnetic field at the magnetic field sensitive device in the equipment to improve the working efficiency or reliability of the equipment has become a technical problem that needs to be solved urgently.

[0199] In view of this, the present application proposes an alternating magnetic field coupling system, the cross-sectional schematic diagram of the alternating magnetic field coupling system is shown in FIG. Figure 2 As shown, the alternating magnetic field coupling system includes a magnetic field generating device 11 , a magnetic field sensitive device 12 and a protection component 13 .

[0200] Among them, the magnetic field generating device 11 is used to generate a first magnetic field, the magnetic field sensitive device 12 is a device that generates eddy current loss or alternating magnetic field interference due to the first magnetic field, and is located within the coverage range of the first magnetic field; a protective component 13 is arranged on the outside of the magnetic field sensitive device 12, and the protective component 13 generates a second magnetic field in the magnetic field sensitive device 12 in the opposite direction to the first magnetic field.

[0201] It should be noted that the magnetic field sensing device 12 may be a magnetic field sensing device or a magnetic field sensing component constituting a magnetic field sensing device. During the operation of the alternating magnetic field coupling system, the magnetic field sensing device 12 may also sense the alternating magnetic field and generate an induced current (i.e., an eddy current effect), thereby generating eddy current losses.

[0202] Optionally, Figure 2 The position of the magnetic field sensitive device 12 and the position of the protective component 13 are only examples. The magnetic field sensitive device 12 can be located in any direction of the magnetic field generating device 11 as long as it is within the first magnetic field generated by the magnetic field generating device 11; the protective component 13 is located on the outside of the magnetic field sensitive device 12 and can also be in any direction of the magnetic field sensitive device 12. This application does not impose any restrictions on this.

[0203] Specifically, during the operation of the alternating magnetic field coupling system, the magnetic field generating device 11 generates a first magnetic field, and the magnetic field sensitive device 12 located within the range of the first magnetic field will generate eddy current losses based on the first magnetic field induction, while the protection component 13 will generate a second magnetic field in the opposite direction of the first magnetic field based on the first magnetic field induction. Therefore, the second magnetic field and the first magnetic field will be superimposed and offset, thereby reducing the magnetic field strength in the magnetic field sensitive device 12, reducing the eddy current losses generated by the magnetic field sensitive device 12, and thereby improving the working efficiency of the alternating magnetic field coupling system.

[0204] Optionally, the alternating magnetic field coupling system further includes a magnetic field receiving device, and a magnetic field sensitive device is present on at least one side of the magnetic field generating device and the magnetic field receiving device.

[0205] Optionally, the protection component 13 includes a high-conductivity metal, the thickness of the high-conductivity metal is greater than the skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum. The use of a high-conductivity metal material can better construct an inductive loop around the magnetic field sensitive device, thereby generating a reverse magnetic field, thereby achieving the purpose of weakening the magnetic field in the magnetic field sensitive device; the use of a high-conductivity metal with a thickness greater than the skin depth can ensure that the inductive loop has a high Q value, thereby avoiding the protection component itself from generating a large eddy current loss.

[0206] Optionally, the protection component 13 further includes a single-turn closed Litz wire, a multi-turn closed enameled wire or a multi-turn closed Litz wire, wherein the turns of the multi-turn closed enameled wire are connected in series, which can suppress the skin effect and reduce the eddy current loss caused by the magnetic field sensitive device.

[0207] Optionally, the protection component 13 further includes a multi-turn closed Litz wire, and the turns of the multi-turn closed enameled wire or the multi-turn closed Litz wire are connected in series, which can achieve a better shielding effect.

[0208] Optionally, the protection component 13 further includes a capacitor, which is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop to increase the induced current and thereby enhance the magnetic field shielding effect.

[0209] The specific location of the protection component 13 is described in detail in the following embodiments, taking the wireless charging scenario as an example.

[0210] Exemplarily, the present application proposes a wireless charging alternating magnetic field coupling system or a wireless charging electronic system. Figure 1 The application scenario shown is a cross-sectional diagram of the wireless charging electronic system proposed in this application. Figure 1 like Figure 3 As shown, the electronic system includes a powered device 101 and a power supply device 102, the powered device 101 includes a receiving coil 1011, a first magnetically sensitive component 1012 and a first protective component 1013, the power supply device 102 includes a transmitting coil 1021, the first magnetically sensitive component 1012 includes a component that generates eddy current loss or is disturbed by an alternating magnetic field during the process of the power supply device 102 charging the powered device 101, the first magnetically sensitive component 1012 is located in a space surrounded by the receiving coil 1011, and the first protective component 1013 is arranged between the first magnetically sensitive component 1012 and the receiving coil 1011.

[0211] It should be noted that Figure 3 The position of the first protection component 1013 shown in the figure is not limited to this, and is only an example. The powered device 101 is equivalent to the magnetic field receiving device mentioned in the above embodiment, the power supply device 102 is equivalent to the magnetic field generating device mentioned in the above embodiment, the first magnetic sensitive component 1012 is equivalent to the magnetic field sensitive device mentioned in the above embodiment, and the first protection component 1013 is equivalent to the protection component mentioned in the above embodiment.

[0212] Among them, the transmitting coil 1021 and the receiving coil 1011 realize wireless transmission of electric energy through magnetic field coupling and generate a first magnetic field when the power supply device 102 charges the powered device 101, and the receiving coil 1011 generates a first induced current based on electromagnetic induction, and the first induced current is used to provide electric energy to the powered device 101; the first protective component 1013 is used to generate a second magnetic field in the first area when the power supply device 102 charges the powered device 101, and the magnetic field direction of the second magnetic field in the first area is opposite to the magnetic field direction of the first magnetic field in the first area.

[0213] Optionally, the transmitting coil can also be called an output coil, a primary coil or a power transmitting coil, the receiving coil can also be called a secondary coil or a power receiving coil, the power supply device can also be called a charging stand or a charger, etc., and the power receiving device can be a smart watch, a smart phone or a tablet computer.

[0214] For ease of understanding, in the process of the power supply device 102 charging the powered device 101, the transmitting coil 1021 and the receiving coil 1011 realize wireless transmission of electric energy through magnetic field coupling and generate a first magnetic field. The receiving coil 1011 generates a first induced current based on electromagnetic induction to power the powered device 101. At the same time, the first magnetically sensitive component 1012 in the powered device 101 will generate eddy current loss based on the first magnetic field induction, and the first protective component 1013 will generate a second magnetic field in the first area. The magnetic field direction of the second magnetic field in the first area is opposite to the magnetic field direction of the first magnetic field in the first area. Therefore, the second magnetic field and the first magnetic field will be superimposed and offset in the first area, thereby reducing the magnetic field strength in the middle of the coil, so that the eddy current loss generated by the first magnetically sensitive component 1012 is reduced, thereby improving the charging efficiency of the powered device 101.

[0215] It should be noted that the first protection component 1013 generates the second magnetic field because the first protection component 1013 generates a second induced current based on the first magnetic field, and then the second induced current generates a second magnetic field in the first region.

[0216] Specifically, the first magnetic sensitive component 1012 is located in the first space surrounded by the receiving coil 1011; accordingly, the first protective component 1013 is arranged on the first outer surface of the first magnetic sensitive component 1012, and the direction of the first outer surface is parallel to the magnetic field direction of the first magnetic field in the first space. Figure 2 like Figure 4 shown.

[0217] Optionally, the embodiment of the present application does not limit the shapes of the first magnetic sensitive component 1012 and the first protective component 1013 .

[0218] Furthermore, the first protection component 1013 is also disposed in a first target area on the second outer surface of the first magnetic sensitive component 1012, the second outer surface being a surface of the first magnetic sensitive component away from the power supply device 102, the first target area does not include an unshielded area on the second outer surface, Figure 4 Based on the example cross-section diagram Figure 3 like Figure 5 As shown, Figure 5 Figure (a) is a cross-sectional schematic diagram when the first target area is the entire second outer surface, and Figure (b) is a cross-sectional schematic diagram when the first target area is the surface of the second outer surface excluding the unobstructed area.

[0219] Optionally, the unobstructed area is limited by specific scene conditions, which is not limited here.

[0220] Furthermore, the first protection component 1013 is also disposed in a second target area on the third outer surface of the first magnetic sensitive component 1012, the third outer surface being a surface of the first magnetic sensitive component close to the power supply device 102, and the second target area does not include an unshielded area on the third outer surface, so as to Figure 4 Based on the example, its exemplary cross section is shown Figure 4 like Figure 6 As shown, Figure 6 Figure (a) is a cross-sectional schematic diagram when the second target area is the entire third outer surface, and Figure (b) is a cross-sectional schematic diagram when the second target area is the surface of the third outer surface excluding the unobstructed area.

[0221] Optionally, the first magnetically sensitive component 1012 may be a battery, a magnet, a PCBA, a sensor and / or a structural component, etc., which may easily generate eddy current losses or may be easily disturbed by an alternating magnetic field.

[0222] As an optional implementation, the power supply device 102 includes a second magnetic sensitive component 1022 and a second protective component 1023, the second magnetic sensitive component 1022 includes a component that generates eddy current loss or is disturbed by an alternating magnetic field during the process of the power supply device 102 charging the powered device 101, the second magnetic sensitive component 1022 is located in a space surrounded by the transmitting coil 1021, and the second protective component 1023 is disposed between the second magnetic sensitive component 1022 and the transmitting coil 1021, so as to Figure 4 Based on the example, its exemplary cross section is shown Figure 5 like Figure 7 shown.

[0223] The second protection component 1023 is used to generate a third magnetic field in the second area when the power supply device 102 charges the powered device 101 . The magnetic field direction of the third magnetic field in the second area is opposite to that of the first magnetic field in the second area.

[0224] Optionally, the second magnetic sensitive component 1022 is equivalent to the magnetic field sensitive device mentioned in the above embodiment.

[0225] That is to say, the second protection component 1023 generates a third magnetic field in the second region, and the magnetic field direction of the third magnetic field in the second region is opposite to the magnetic field direction of the first magnetic field in the second region. Therefore, the third magnetic field and the first magnetic field will be superimposed and weakened in the second region, so that the magnetic field strength in the middle of the coil is reduced, thereby reducing the eddy current loss of the second magnetic sensitive component 1022 and improving the charging efficiency of the powered device 101.

[0226] It should be noted that when the second protection component 1023 generates the third magnetic field in the second area during the process of the power supply device 102 charging the powered device 101 , the third induced current is generated based on the first magnetic field induction, thereby generating the third magnetic field in the second area.

[0227] Specifically, the second magnetic sensitive component 1022 is located in the second space surrounded by the transmitting coil 1021; accordingly, the second protective component 1023 is arranged on the fourth outer surface of the second magnetic sensitive component 1022, and the direction of the fourth outer surface is parallel to the magnetic field direction of the first magnetic field in the second space, so as to Figure 4 Based on the example, its exemplary cross section is shown Figure 6 like Figure 8 shown.

[0228] Optionally, the embodiment of the present application does not limit the shapes of the second magnetic sensitive component 1022 and the second protective component 1023 .

[0229] Furthermore, the second protection component 1023 is also disposed in a third target area of ​​the fifth outer surface of the second magnetic sensitive component 1022, the fifth outer surface being a surface of the second magnetic sensitive component 1022 away from the powered device 101, and the third target area does not include an unshielded area on the fifth outer surface. Figure 8 Based on the example cross-section diagram Figure 7 like Fig. 9 As shown, Fig. 9 Figure (a) is a schematic cross-sectional view when the third target area is the entire fifth outer surface, and Figure (b) is a schematic cross-sectional view when the third target area is the surface of the fifth outer surface excluding the unobstructed area.

[0230] Optionally, the unobstructed area is limited by specific scene conditions, which is not limited here.

[0231] Furthermore, the second protection component 1023 is also disposed in a fourth target area on the sixth outer surface of the second magnetic sensitive component 1022, the sixth outer surface being the surface of the second magnetic sensitive component 1022 close to the powered device 101, and the fourth target area does not include an unshielded area on the sixth outer surface, so as to Figure 8 Based on the example, its exemplary cross section is shown Figure 8 like Fig.10 As shown, Fig.10 Figure (a) is a cross-sectional schematic diagram when the fourth target area is the entire sixth outer surface, and Figure (b) is a cross-sectional schematic diagram when the fourth target area is the surface of the sixth outer surface excluding the unobstructed area.

[0232] Optionally, the second magnetically sensitive component 1022 may be a component that is prone to eddy current loss or susceptible to interference from an alternating magnetic field, such as a battery, a magnet, a PCBA, a sensor, and / or a structural component.

[0233] In a possible implementation, when the power supply device 102 charges the powered device 101 , the second protection component 1023 and the first protection component 1013 may jointly generate a second magnetic field in the first area.

[0234] Optionally, the material of the first protection component 1013 and the second protection component 1023 can be a high-conductivity metal, such as aluminum, copper and other high-conductivity metals, and the thickness of the high-conductivity metal is greater than the skin depth of the high-conductivity metal. The use of high-conductivity metal wrapped on the surface of the first magnetic sensitive component 1012 and the second magnetic sensitive component 1022 that generate eddy current loss or are disturbed by the alternating magnetic field can better form an inductive loop, generate a magnetic field in the opposite direction of the original magnetic field, and reduce the magnetic field strength in the middle of the coil; and the use of high-conductivity metal with a thickness greater than its skin depth can ensure that the inductive loop has a high Q value, thereby avoiding the first magnetic sensitive component 1012 and the second magnetic sensitive component 1022 themselves from generating large eddy current losses, thereby improving the charging efficiency of the powered device 101.

[0235] That is to say, the first protection component 1013 and the second protection component 1023 are wrapped around the surface of the component that generates eddy current loss or is easily disturbed by the alternating magnetic field, which is equivalent to shielding a part of the magnetic field, thereby reducing the eddy current loss.

[0236] In one possible implementation, when the second outer surface and / or the third outer surface mentioned above are completely wrapped by the first protective component, the portion of the first protective component with relatively weak shielding effect between the second outer surface and / or the third outer surface can be removed. In this way, the material usage of the first protective component can be reduced, and the cost and weight can be reduced without significantly weakening the shielding effect. Similarly, when the fifth outer surface and / or the sixth outer surface mentioned above are completely wrapped by the second protective component, the portion of the second protective component with relatively weak shielding effect between the fifth outer surface and / or the sixth outer surface can be removed. In this way, the material usage of the second protective component can be reduced, and the cost and weight can be reduced without significantly weakening the shielding effect.

[0237] Optionally, the first protection component 1013 and the second protection component 1023 can also use a single-turn closed shaped Litz wire, a multi-turn closed enameled wire or a multi-turn closed Litz wire of the same shape to completely or partially replace the corresponding metal, wherein the single-strand wire diameter must be smaller than the skin depth to form an induction current loop with a higher Q value. The exemplary structure diagram is as follows: Fig.11 As shown, Fig.11Figure (a) is a schematic diagram of a structure in which the protective component is completely composed of the above coil, and Figure (b) is a schematic diagram of a structure in which the protective component is partially composed of the above coil. The use of Litz wire or enameled wire with a single-strand wire diameter smaller than the skin depth can suppress the skin effect. In the case of relatively loose applications, the available space can be fully utilized to obtain excellent shielding effects while reducing eddy current losses on the corresponding protective components.

[0238] Optionally, the first protection component 1013 and the second protection component 1023 further include multiple turns of closed enameled wire or multiple turns of closed Litz wire, and the multiple turns of closed enameled wire or multiple turns of closed Litz wire are connected in series.

[0239] Optionally, the first protection component 1013 and the second protection component 1023 further include a capacitor, which is connected in series in a multi-turn closed enameled wire or multi-turn closed Litz wire loop to form an inductance-capacitance (LC) series loop, and by changing the capacitance value, the induced current is increased, thereby enhancing the magnetic field shielding effect. The exemplary structure diagram is shown in FIG. Fig.12 shown.

[0240] Optionally, the protection component formed by the coil can also offset the magnetic field by actively loading a reverse current.

[0241] It should be noted that the wireless charging electronic system provided in the above embodiment is not limited to the wireless charging scenario, but can also be applied to a variety of scenarios. Depending on the specific usage scenario, the location and amount of the first protection component and the second protection component are also different. When the first magnetic sensitive component and the second magnetic sensitive component exist, the outer surfaces of the first magnetic sensitive component and the second magnetic sensitive component that are parallel to the magnetic field direction of the first magnetic field in space are both provided with protection components. Several examples are provided below for detailed description.

[0242] As an example, in the case where only the first magnetic sensitive component 1012 that generates eddy current loss or is susceptible to alternating magnetic field interference exists on the powered device 101, that is, only the area requiring magnetic field shielding exists on the powered device 101, and the bottom of the powered device 101 cannot be completely shielded, the protection component of the first magnetic sensitive component 1012 is divided into two parts, one part (the first protection component 1013) is located on the powered device 101, and the other part (the second protection component 1023) is located on the power supply device 102. The specific cross-sectional diagram is as follows: Figure 9 like Fig.13 As shown, Fig.13Figure (a) is a cross-sectional schematic diagram when there is space to add the first protective component on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, and the surface close to the power supply device 102 is completely unblocked; Figure (b) is a cross-sectional schematic diagram when there is space to add the first protective component on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, and the center of the surface close to the power supply device 102 is unblocked; Figure (c) is a cross-sectional schematic diagram when there is no space to add the first protective component on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, and the surface close to the power supply device 102 is completely unblocked; Figure (d) is a cross-sectional schematic diagram when there is no space to add the first protective component on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, and the center of the surface close to the power supply device 102 is unblocked.

[0243] Optionally, the protection component is made of a metal with high electrical conductivity, such as aluminum or copper, and has a thickness greater than the skin depth of the metal.

[0244] Optionally, the application scenario may be a smart watch with heart rate and blood oxygen detection function, etc.

[0245] When the power supply device 102 charges the powered device 101 , the two protective components jointly shield the first magnetic sensitive component 1012 , thereby reducing the eddy current loss of the first magnetic sensitive component 1012 and improving the charging efficiency.

[0246] That is to say, in this scenario, the protection component adopts a split structure, which can achieve the best shielding effect without interfering with the functional requirements of the equipment; the protection structure is small in size and volume, and flexible in design, meeting the application requirements of compact equipment; and the shielding effect of the alternating magnetic field is not attenuated in a strong static magnetic environment, and is suitable for magnetic wireless charging scenarios with counter-magnets.

[0247] When there are areas on both the powered device 101 and the power supply device 102 that require magnetic field shielding, there may be a variety of different application structures according to size and functional requirements in actual applications.

[0248] Exemplarily, in a scenario where both the powered device 101 and the power supply device 102 have areas that need to be shielded from magnetic fields and the areas are of the same size, that is, there are first magnetically sensitive components 1012 and second magnetically sensitive components 1022 and the two components are of the same size, and the surface of the first magnetically sensitive component 1012 close to the power supply device 102 and the surface of the second magnetically sensitive component 1022 close to the powered device 101 cannot be completely shielded, schematic diagram of the optimal protection component structure cross section for different application requirements Figure 10 And structural cross section diagram Figure 10 As Fig.14 and Fig.15 shown.

[0249] Fig.14Figure (a) is a cross-sectional schematic diagram of the first magnetic sensitive component 1012 having space to add a first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 is completely unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add a second protective component 1023, and the surface close to the powered device 101 is completely unblocked; Figure (b) is a cross-sectional schematic diagram of the first magnetic sensitive component 1012 having space to add a first protective component 1013 on the surface away from the power supply device 102, and the center of the surface close to the power supply device 102 is unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add a second protective component Component 1023, a cross-sectional schematic diagram when the surface close to the powered device 101 is completely unobstructed; (c) Figure is a cross-sectional schematic diagram when there is space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the center of the surface close to the power supply device 102 is unobstructed, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the center of the surface close to the powered device 101 is unobstructed; (d) Figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unobstructed, and The surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023, and the surface close to the powered device 101 is completely unobstructed. (e) The figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the center of the surface close to the power supply device 102 is unobstructed, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unobstructed. (f) The figure is a cross-sectional schematic diagram when there is no space on the surface of the first magnetic sensitive component 1012 away from the power supply device 102 A first protective component 1013 is added, the center of the surface close to the power supply device 102 cannot be blocked, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the center of the surface close to the powered device 101 cannot be blocked; (g) Figure is a cross-sectional schematic diagram when there is space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unblocked, and there is no space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unblocked;(h) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is space to add the first protective component 1013, and the center of the surface close to the power supply device 102 is not blocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has no space to add the second protective component 1023, and the surface close to the powered device 101 is completely unblocked. ;

[0250] Fig.15 Figure (a) is a cross-sectional schematic diagram when there is space to add the first protective component 1013 to the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the center of the surface close to the power supply device 102 is not blocked, and there is no space to add the second protective component 1023 to the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the center of the surface close to the powered device 101 is not blocked; Figure (b) is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 to the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unblocked, and there is no space to add the second protective component 1023 to the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unblocked; (c) The figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 to the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the center of the surface close to the power supply device 102 is not blocked, and there is no space to add the second protective component 1023 to the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unblocked; (d) The figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 to the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the center of the surface close to the power supply device 102 is not blocked, and there is no space to add the second protective component 1023 to the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the center of the surface close to the powered device 101 is not blocked.

[0251] As an example, in a scenario where both the powered device 101 and the power supply device 102 have areas that need to be shielded from magnetic fields and the areas are of the same size, that is, there are a first magnetically sensitive component 1012 and a second magnetically sensitive component 1022 and the two components are of the same size, and the surface of the first magnetically sensitive component 1012 close to the power supply device 102 cannot be completely shielded, schematic cross-section diagram of the optimal protective component structure for different application requirements Figure 10 Two such Fig.16 shown.

[0252] Fig.16Figure (a) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is space to add the first protective component 1013, the surface close to the power supply device 102 is completely unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023; Figure (b) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is space to add the first protective component 1013, the center of the surface close to the power supply device 102 is unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023 , a cross-sectional schematic diagram when the surface close to the powered device 101 is completely covered by the second protective component 1023; (c) FIG. 1 is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unblocked, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely covered by the second protective component 1023; (d) FIG. 1 is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the center of the surface close to the power supply device 102 is unblocked, and the second magnetic sensitive component 1012 The surface of the first magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023; (e) Figure is a cross-sectional schematic diagram when the surface of the first magnetic sensitive component 1012 away from the power supply device 102 has space to add the first protective component 1013, the surface close to the power supply device 102 is completely unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has no space to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023; (f) Figure is a cross-sectional schematic diagram when the surface of the first magnetic sensitive component 1012 away from the power supply device 102 has space to add the first protective component 1013 The center of the protective component 1013 close to the power supply device 102 cannot be blocked, and there is no space on the surface of the second magnetic sensitive component 1012 away from the powered device 101 to add the second protective component 1023, and the surface close to the powered device 101 is a cross-sectional schematic diagram when the second protective component 1023 is completely covered; (g) Figure is a cross-sectional schematic diagram when there is no space on the surface of the first magnetic sensitive component 1012 away from the power supply device 102 to add the first protective component 1013, the surface close to the power supply device 102 is completely unblocked, and there is no space on the surface of the second magnetic sensitive component 1012 away from the powered device 101 to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023;(h) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is no space to add the first protective component 1013, the center of the surface close to the power supply device 102 cannot be blocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 where there is no space to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023. ;

[0253] As another example, in a scenario where both the powered device 101 and the power supply device 102 have areas that require magnetic field shielding, that is, there are first magnetic sensitive components 1012 and second magnetic sensitive components 1022, and the size of the second magnetic sensitive component 1022 is smaller than that of the first magnetic sensitive component 1012, and the surface of the first magnetic sensitive component 1012 close to the power supply device 102 cannot be completely shielded, schematic diagram of the optimal protection component structure cross section for different application requirements Figure 10 Three like Fig.17 shown.

[0254] Fig.17Figure (a) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is space to add the first protective component 1013, the surface close to the power supply device 102 is completely unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023; Figure (b) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is space to add the first protective component 1013, the center of the surface close to the power supply device 102 is unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023 , a cross-sectional schematic diagram when the surface close to the powered device 101 is completely covered by the second protective component 1023; (c) FIG. 1 is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unblocked, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely covered by the second protective component 1023; (d) FIG. 1 is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the center of the surface close to the power supply device 102 is unblocked, and the second magnetic sensitive component 1012 The surface of the first magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023; (e) Figure is a cross-sectional schematic diagram when the surface of the first magnetic sensitive component 1012 away from the power supply device 102 has space to add the first protective component 1013, the surface close to the power supply device 102 is completely unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has no space to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023; (f) Figure is a cross-sectional schematic diagram when the surface of the first magnetic sensitive component 1012 away from the power supply device 102 has space to add the first protective component 1013 The center of the protective component 1013 close to the power supply device 102 cannot be blocked, and there is no space on the surface of the second magnetic sensitive component 1012 away from the powered device 101 to add the second protective component 1023, and the surface close to the powered device 101 is a cross-sectional schematic diagram when the second protective component 1023 is completely covered; (g) Figure is a cross-sectional schematic diagram when there is no space on the surface of the first magnetic sensitive component 1012 away from the power supply device 102 to add the first protective component 1013, the surface close to the power supply device 102 is completely unblocked, and there is no space on the surface of the second magnetic sensitive component 1012 away from the powered device 101 to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023;(h) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is no space to add the first protective component 1013, the center of the surface close to the power supply device 102 cannot be blocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 where there is no space to add the second protective component 1023, and the surface close to the powered device 101 is completely covered by the second protective component 1023. ;

[0255] As another example, in a scenario where both the powered device 101 and the power supply device 102 have areas that require magnetic field shielding, that is, there are first magnetic sensitive components 1012 and second magnetic sensitive components 1022, and the size of the second magnetic sensitive component 1022 is smaller than that of the first magnetic sensitive component 1012, and the surface of the second magnetic sensitive component 1022 close to the powered device 101 cannot be completely shielded, schematic diagram of the optimal protection component structure cross section for different application requirements Figure 10 Four Fig.18 shown.

[0256] Fig.18Figure (a) is a cross-sectional schematic diagram of the first magnetic sensitive component 1012 having space to add a first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 is completely covered with the first protective component 1013, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add a second protective component 1023, and the surface close to the powered device 101 is completely unblocked; Figure (b) is a cross-sectional schematic diagram of the first magnetic sensitive component 1012 having space to add a first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 is completely covered with the first protective component 1013, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add a second protective component 1023 (c) The first magnetic sensitive component 1012 has no space to add the first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 completely covers the first protective component 1013, and the surface of the second magnetic sensitive component 1012 away from the power receiving device 101 has space to add the second protective component 1023, and the surface close to the power receiving device 101 is completely unblocked; (d) The first magnetic sensitive component 1012 has no space to add the first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 completely covers the first protective component 1013. 3, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the center of the surface close to the powered device 101 is not blocked; (e) Figure is a cross-sectional schematic diagram when there is space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 completely covers the first protective component 1013, and there is no space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unblocked; (f) Figure is a cross-sectional schematic diagram when there is space to add the first magnetic sensitive component 1012 on the surface away from the power supply device 102 The protective component 1013, the surface close to the power supply device 102 completely covers the first protective component 1013, and there is no space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the center of the surface close to the powered device 101 is not blocked; (g) Figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 completely covers the first protective component 1013, and there is no space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unblocked;(h) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is no space to add the first protective component 1013, a surface close to the power supply device 102 is completely covered with the first protective component 1013, and a surface of the second magnetic sensitive component 1012 away from the powered device 101 where there is no space to add the second protective component 1023, and a center of the surface close to the powered device 101 is not blocked. ;

[0257] As another example, in a scenario where both the powered device 101 and the power supply device 102 have areas that require magnetic field shielding, that is, there are first magnetic sensitive components 1012 and second magnetic sensitive components 1022, and the size of the second magnetic sensitive component 1022 is smaller than the size of the first magnetic sensitive component 1012, and the surface of the first magnetic sensitive component 1012 close to the power supply device 102 cannot be completely shielded and the surface of the second magnetic sensitive component 1022 close to the powered device 101 cannot be completely shielded, schematic diagram of the optimal protection component structure cross section for different application requirements Figure 10 Wuhe cross section diagram Figure 10 Liu Ru Fig.19 and Fig. 20 shown.

[0258] Fig.19Figure (a) is a cross-sectional schematic diagram of the first magnetic sensitive component 1012 having space to add a first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 is completely unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add a second protective component 1023, and the surface close to the powered device 101 is completely unblocked; Figure (b) is a cross-sectional schematic diagram of the first magnetic sensitive component 1012 having space to add a first protective component 1013 on the surface away from the power supply device 102, and the center of the surface close to the power supply device 102 is unblocked, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add a second protective component Component 1023, a cross-sectional schematic diagram when the surface close to the powered device 101 is completely unobstructed; (c) Figure is a cross-sectional schematic diagram when there is space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unobstructed, and the surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023, and the center of the surface close to the powered device 101 is unobstructed; (d) Figure is a cross-sectional schematic diagram when there is space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the center of the surface close to the power supply device 102 is unobstructed, and the second magnetic sensitive component 1012 has space to add the second protective component 1023 The surface of the second magnetic sensitive component 1012 away from the powered device 101 has space to add the second protective component 1023, and the center of the surface close to the powered device 101 is not blocked; (e) Figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unblocked, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unblocked; (e) Figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, and the surface close to the power supply device 102 is completely unblocked. A first protective component 1013 is added, the center of the surface close to the power supply device 102 cannot be blocked, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unblocked. A cross-sectional schematic diagram; (f) Figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unblocked, and there is space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the center of the surface close to the powered device 101 is unblocked;(d) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is no space to add the first protective component 1013, and the center of the surface close to the power supply device 102 is not blocked, and a surface of the second magnetic sensitive component 1012 away from the power receiving device 101 where there is space to add the second protective component 1023, and the center of the surface close to the power receiving device 101 is not blocked. ;

[0259] Fig. 20Figure (a) is a cross-sectional schematic diagram of a first magnetic sensitive component 1012 having space to add a first protective component 1013 on a surface away from the power supply device 102, and a surface close to the power supply device 102 is completely unblocked, and there is no space to add a second protective component 1023 on a surface away from the powered device 101, and a surface close to the powered device 101 is completely unblocked; Figure (b) is a cross-sectional schematic diagram of a first magnetic sensitive component 1012 having space to add a first protective component 1013 on a surface away from the power supply device 102, and the center of the surface close to the power supply device 102 is unblocked, and there is no space to add a second protective component 1023 on the surface away from the powered device 101. (c) The first magnetic sensitive component 1012 has space to add the first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 is completely unobstructed, and there is no space to add the second protective component 1023 on the surface away from the power receiving device 101, and the center of the surface close to the power receiving device 101 is unobstructed; (d) The first magnetic sensitive component 1012 has space to add the first protective component 1013 on the surface away from the power supply device 102, and the center of the surface close to the power supply device 102 is unobstructed, and the second magnetic sensitive component 1012 has no space to add the second protective component 1023 on the surface away from the power receiving device 101, and the center of the surface close to the power supply device 102 is unobstructed. The second magnetic sensitive component 1012 has no space to add the second protective component 1023 on the surface away from the powered device 101, and the center of the surface close to the powered device 101 is not blocked; (e) is a cross-sectional schematic diagram of the first magnetic sensitive component 1012 having no space to add the first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 is completely unblocked, and the second magnetic sensitive component 1012 has no space to add the second protective component 1023 on the surface away from the powered device 101, and the surface close to the powered device 101 is completely unblocked; (f) is a cross-sectional schematic diagram of the first magnetic sensitive component 1012 having no space to add the first protective component 1013 on the surface away from the power supply device 102, and the surface close to the power supply device 102 is completely unblocked. A first protective component 1013 is added, the center of the surface close to the power supply device 102 cannot be blocked, and there is no space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the surface close to the powered device 101 is completely unblocked. A cross-sectional schematic diagram; (g) Figure is a cross-sectional schematic diagram when there is no space to add the first protective component 1013 on the surface of the first magnetic sensitive component 1012 away from the power supply device 102, the surface close to the power supply device 102 is completely unblocked, and there is no space to add the second protective component 1023 on the surface of the second magnetic sensitive component 1012 away from the powered device 101, and the center of the surface close to the powered device 101 is unblocked;(h) is a cross-sectional schematic diagram of a surface of the first magnetic sensitive component 1012 away from the power supply device 102 where there is no space to add the first protective component 1013, and the center of the surface close to the power supply device 102 is not blocked, and a surface of the second magnetic sensitive component 1012 away from the power receiving device 101 where there is no space to add the second protective component 1023, and the center of the surface close to the power receiving device 101 is not blocked. ;

[0260] The above examples are only structural expansions and are applied to scenarios with different application requirements. The first protection component and / or the second protection component are used to shield the magnetic field of the components in the middle of the coil that will generate eddy current losses or be easily disturbed by the alternating magnetic field, so as to reduce their eddy current losses or adverse effects, thereby improving the charging efficiency of the powered device.

[0261] In addition to the wireless charging electronic system described in the above embodiment, the present application also provides a magnetic field electronic system, including a magnetized device and a magnetized supply device, the magnetized device may include the above-mentioned power receiving device 101, the magnetized supply device may include the above-mentioned power supply device 102, the magnetized device is powered by the magnetized supply device, the magnetized supply device may power the magnetized device or other electronic devices, and the magnetic field electronic system may also be used in the induction heating scenario. Among them, the specific distribution and function of the first protection component and the second protection component used to shield the magnetic field of the first magnetic sensitive component and the second magnetic sensitive component that will generate eddy current loss or be easily disturbed by the alternating magnetic field are as described in the above-mentioned wireless charging electronic system, and will not be repeated here.

[0262] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0263] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0264] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0265] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0266] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0267] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0268] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0269] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0270] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

[0271] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An alternating magnetic field coupling system, characterized in that: include: A magnetic field generating device, a magnetic field receiving device and a magnetic field sensitive device, wherein the magnetic field generating device is used to generate a first magnetic field, and the magnetic field sensitive device is a device that generates eddy current loss or alternating magnetic field interference due to the first magnetic field and is located within the coverage of the first magnetic field; A protective component is arranged on the outer surface of the magnetic field sensitive device, and the protective component generates a second magnetic field in the magnetic field sensitive device in a direction opposite to the first magnetic field; A magnetic field sensitive device is provided on at least one side of the magnetic field generating device and the magnetic field receiving device; When the magnetic field sensitive device is only located in the magnetic field receiving device and there is an unshielded area on the third outer surface of the magnetic field sensitive device, the protective component is respectively arranged in the magnetic field generating device and the magnetic field receiving device, and the protective component in the magnetic field generating device is located in the area close to the third outer surface, and the third outer surface is the surface on the magnetic field sensitive device in the magnetic field receiving device close to the magnetic field generating device.

2. The system according to claim 1, characterized in that The protection component is arranged on a first outer surface of the magnetic field sensitive device, and the direction of the first outer surface is perpendicular to a plane facing the magnetic field generating device and the magnetic field receiving device.

3. The system according to claim 2, characterized in that The protective component is also arranged in a first target area on the second outer surface of the magnetic field sensitive device, the second outer surface being the surface on the magnetic field sensitive device in the magnetic field receiving device away from the magnetic field generating device, and the first target area does not include an unshielded area on the second outer surface.

4. The system according to claim 2 or 3, characterized in that: The protective component is also arranged in a second target area on the third outer surface of the magnetic field sensitive device, and the third outer surface is the surface on the magnetic field sensitive device in the magnetic field receiving device close to the magnetic field generating device, and the second target area does not include an unshielded area on the third outer surface.

5. The system according to claim 2 or 3, characterized in that: When the magnetic field sensitive device is only located in the magnetic field generating device and there is an unshielded area on the third outer surface of the magnetic field sensitive device, a protective component is provided in an area close to the third outer surface of the magnetic field receiving device.

6. The system according to claim 1, characterized in that The second magnetic field is induced based on the first magnetic field.

7. The system according to any one of claims 1 to 3, characterized in that The protection component includes a high-conductivity metal, a thickness of the high-conductivity metal is greater than a skin depth of the high-conductivity metal, and the high-conductivity metal includes copper or aluminum.

8. The system according to any one of claims 1 to 3, characterized in that The protection component includes a single-turn closed Litz wire, a multi-turn closed enameled wire or a multi-turn closed Litz wire.

9. The system according to any one of claims 1 to 3, characterized in that The protection component comprises a plurality of turns of closed enameled wire or a plurality of turns of closed Litz wire, and each turn of the plurality of turns of closed enameled wire or the plurality of turns of closed Litz wire is connected in series.

10. The system according to claim 8, characterized in that The protection component further comprises a capacitor, which is connected in series in the multi-turn closed enameled wire or the multi-turn closed Litz wire loop.

11. A magnetic field generating device, characterized in that: The magnetic field generating device is used to generate a first magnetic field received by a magnetic field receiving device. A magnetic field sensitive device is present on at least one side of the magnetic field generating device and the magnetic field receiving device. The magnetic field sensitive device is a device that generates eddy current loss or alternating magnetic field interference due to the first magnetic field. A protective component is provided in the magnetic field generating device, which is used to generate a second magnetic field in the magnetic field sensitive device that is opposite in direction to the first magnetic field. When the magnetic field sensitive device is only located in the magnetic field generating device and there is an unshielded area on the third outer surface of the magnetic field sensitive device, the protective component is respectively provided in the magnetic field generating device and the magnetic field receiving device, and the protective component in the magnetic field receiving device is located in an area close to the third outer surface, and the third outer surface is a surface on the magnetic field sensitive device in the magnetic field generating device close to the magnetic field receiving device; the protective component in the magnetic field generating device is provided on the outer surface of the magnetic field sensitive device.

12. The magnetic field generating device according to claim 11, characterized in that: The protective component in the magnetic field generating device is arranged on the first outer surface of the magnetic field sensitive device, and the direction of the first outer surface is perpendicular to the plane facing the magnetic field generating device and the magnetic field receiving device.

13. The magnetic field generating device according to claim 11 or 12, characterized in that: The protective component in the magnetic field generating device is also arranged in a first target area on the second outer surface of the magnetic field sensitive device, the second outer surface being the surface on the magnetic field sensitive device in the magnetic field generating device away from the magnetic field receiving device, and the first target area does not include an unshielded area on the second outer surface.

14. The magnetic field generating device according to claim 11 or 12, characterized in that: The protective component in the magnetic field generating device is also arranged in a second target area on the third outer surface of the magnetic field sensitive device, and the second target area does not include an unshielded area on the third outer surface.

15. A magnetic field receiving device, characterized in that: The magnetic field receiving device is used to receive the first magnetic field generated by the magnetic field generating device. There is a magnetic field sensitive device on at least one side of the magnetic field generating device and the magnetic field receiving device. The magnetic field sensitive device is a device that generates eddy current loss or alternating magnetic field interference due to the first magnetic field. The magnetic field receiving device is provided with a protective component, which is used to generate a second magnetic field in the magnetic field sensitive device that is opposite to the first magnetic field in direction. When the magnetic field sensitive device is only located in the magnetic field receiving device and there is an unshielded area on the third outer surface of the magnetic field sensitive device, a protective component is provided on the area of ​​the magnetic field generating device close to the third outer surface. The third outer surface is the surface of the magnetic field sensitive device in the magnetic field receiving device close to the magnetic field generating device. The protective component in the magnetic field receiving device is provided on the outer surface of the magnetic field sensitive device.

16. The magnetic field receiving device according to claim 15, characterized in that: The protective component in the magnetic field receiving device is arranged on the first outer surface of the magnetic field sensitive device, and the direction of the first outer surface is perpendicular to the plane facing the magnetic field generating device and the magnetic field receiving device.

17. The magnetic field receiving device according to claim 15 or 16, characterized in that: The protective component in the magnetic field receiving device is also arranged in a first target area on the second outer surface of the magnetic field sensitive device, the second outer surface being the surface on the magnetic field sensitive device in the magnetic field receiving device away from the magnetic field generating device, and the first target area does not include an unshielded area on the second outer surface.

18. The magnetic field receiving device according to claim 15 or 16, characterized in that: The protective component in the magnetic field receiving device is also arranged in a second target area on the third outer surface of the magnetic field sensitive device, and the third outer surface is the surface of the magnetic field sensitive device in the magnetic field receiving device close to the magnetic field generating device, and the second target area does not include an unshielded area on the third outer surface.

19. A wireless charging electronic system, characterized in that: include: A power supply device and a power receiving device, wherein the power supply device comprises a transmitting coil and the power receiving device comprises a receiving coil; The transmitting coil and the receiving coil are used to realize wireless transmission of electric energy through magnetic field coupling during the process in which the power supply device charges the power receiving device, and to generate a first magnetic field; The receiving coil generates a first induced current based on electromagnetic induction, and the first induced current is used to provide electric energy to the powered device; Among them, when the first magnetically sensitive component is only located on the powered device and there is an unshielded area on the third outer surface of the first magnetically sensitive component, the powered device further includes a first protective component, the first protective component is located on the outer surface of the first magnetically sensitive component, and the first protective component is used to generate a second magnetic field in the first area during the process of the power supply device charging the powered device, and the magnetic field direction of the second magnetic field in the first area is opposite to the magnetic field direction of the first magnetic field in the first area; the power supply device includes a second protective component, the second protective component is located in the area of ​​the power supply device close to the third outer surface, and the third outer surface is the surface of the first magnetically sensitive component in the powered device close to the power supply device; when the power supply device charges the powered device, the second protective component and the first protective component jointly generate the second magnetic field in the first area; the first magnetically sensitive component includes a component that generates eddy current loss or is interfered by an alternating magnetic field during the process of the power supply device charging the powered device.

20. The system according to claim 19, characterized in that When the first protection component generates a second magnetic field in the first area during the process in which the power supply device charges the powered device, the first protection component is specifically used to: A second induced current is generated based on the first magnetic field induction, and the second induced current is used to generate the second magnetic field in the first area.

21. The system according to claim 19 or 20, characterized in that The first magnetically sensitive component is located in a first space surrounded by the receiving coil; The first protection component is disposed on a first outer surface of the first magnetically sensitive component, and a direction of the first outer surface is parallel to a magnetic field direction of the first magnetic field in the first space.

22. The system according to claim 21, characterized in that The first protection component is also arranged in a first target area of ​​a second outer surface of the first magnetically sensitive component, the second outer surface being a surface of the first magnetically sensitive component away from the power supply device, and the first target area does not include an unshielded area on the second outer surface.

23. The system according to claim 21, characterized in that The first protection component is further disposed on a second target area on a third outer surface of the first magnetically sensitive component, and the second target area does not include an unshieldable area on the third outer surface.

24. The system according to any one of claims 19-20, 22-23, characterized in that: The first magnetically sensitive component includes at least one of the following devices: a magnet, a printed circuit board assembly (PCBA), a battery, a sensor, and a structural component.

25. The system according to claim 19, characterized in that When the power supply device includes a second magnetically sensitive component, the second magnetically sensitive component includes a component that generates eddy current loss or is disturbed by an alternating magnetic field during the process of the power supply device charging the powered device; The second protection component is further used to generate a third magnetic field in the second area when the power supply device is charging the powered device, and the magnetic field direction of the third magnetic field in the second area is opposite to the magnetic field direction of the first magnetic field in the second area.

26. The system according to claim 25, characterized in that The second magnetically sensitive component is located in a second space surrounded by the transmitting coil; The second protection component is disposed on a fourth outer surface of the second magnetically sensitive component, and a direction of the fourth outer surface is parallel to a magnetic field direction of the first magnetic field in the second space.

27. The system according to claim 26, characterized in that The second protection component is also arranged in a third target area of ​​the fifth outer surface of the second magnetically sensitive component. The fifth outer surface is a surface of the second magnetically sensitive component away from the powered device. The third target area does not include an unshielded area on the fifth outer surface.

28. The system according to claim 26 or 27, characterized in that The second protection component is also arranged in a fourth target area on a sixth outer surface of the second magnetically sensitive component, where the sixth outer surface is a surface of the second magnetically sensitive component close to the powered device, and the fourth target area does not include an unshielded area on the sixth outer surface.

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