Energy-gathering primary coil structure and coil device for wireless charging of rotary equipment

Abstract

The invention provides an energy-gathered primary coil structure and coil device for wireless charging of rotary equipment. The deformable elastic film is fixedly connected to the arc-shaped end of the shell, and a storage bag with a sealed cavity is formed. A plurality of primary coils arranged in a plurality of rows and columns are embedded on the elastic film. The medium charging and discharging device is used for storing an insulating medium and charging the medium into the storage bag cavity when the primary coil is in butt joint with a secondary coil on equipment for charging, so that the elastic film deforms and is attached to the equipment to change the direction of the primary coil, and the medium is discharged after charging is completed, so that the deformation of the elastic film is recovered. On one hand, the position and orientation of the primary coil on the elastic film can be controlled, so that the magnetic field of the primary coil is superposed at the position of the secondary coil, the magnetic field intensity reaches the maximum, the energy gathering effect is achieved, and the wireless charging efficiency is improved; and on the other hand, seawater in a coil coupling area can be discharged, so that eddy-current loss hardly exists in the coupling area, the electric energy transmission efficiency is improved, and efficient charging of different underwater devices is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless charging coil structures, and in particular relates to an energy-gathering primary coil structure for wireless charging of rotary equipment and an energy-gathering coil device for wireless charging of rotary equipment comprising the primary coil structure. Background Art

[0002] Underwater equipment such as underwater vehicles have many applications such as hydrological collection, seabed topography detection, and resource exploration. Currently, the charging of electric underwater vehicles mainly includes manual charging and underwater docking charging. Underwater docking charging installs fixed / floating charging stations on the seabed, sea surface or other locations. The vehicle can return to the charging station for charging while performing its mission, which has the advantages of convenience, speed and high degree of automation.

[0003] Wireless charging is an underwater docking charging technology that transfers energy through the mutual coupling between the secondary coil on the vehicle and the primary coil at the charging station. It has the advantages of no physical connection, avoiding corrosion and damage to the connecting elements, and reducing the risk of leakage. However, in conventional wireless charging coil devices, the position of the primary coil is fixed. When the secondary coil is far away or smaller or larger than the primary coil, the magnetic field coupling strength is low, resulting in low power transmission efficiency, and cannot adapt to the efficient charging of underwater equipment of different sizes and positions and corresponding power requirements. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the wireless charging coil device in the prior art cannot adapt to the efficient charging of different underwater equipment, and to provide an energy-gathering primary coil structure for wireless charging of rotary equipment and an energy-gathering coil device for wireless charging of rotary equipment including the primary coil structure. The present invention installs the primary coil array on the elastic membrane of the storage capsule. For rotary underwater equipment of different volumes, positions and corresponding power requirements, the shape of the elastic membrane can be adjusted by changing the amount of medium filled in the storage capsule to change the position and orientation of the coil, thereby maximizing the magnetic field coupling strength and ensuring efficient charging of different underwater equipment.

[0005] To achieve the above purpose, the technical solution provided by the present invention is:

[0006] One aspect of the present invention provides an energy-gathering primary coil structure for wireless charging of rotary equipment, comprising a housing, an elastic membrane, a dielectric charger and a plurality of primary coils;

[0007] The shell is in the shape of a hollow box with an open upper end, the elastic membrane is deformable, in an arc shape in a static state, and is fixedly connected to the upper end of the shell, and the shell and the elastic membrane form a storage bag with a sealed chamber;

[0008] The plurality of primary coils are embedded on the elastic membrane and are arranged in a plurality of rows and columns at equal intervals in parallel with the axis of the elastic membrane;

[0009] The dielectric charger and discharger is used to store insulating medium and to charge the insulating medium into the chamber of the storage bag when the primary coil is docked with the secondary coil on the rotary underwater equipment to cause the elastic membrane to deform and fit the equipment to change the orientation of the primary coil, and to discharge the charged insulating medium after charging is completed to allow the elastic membrane to restore its deformation.

[0010] Furthermore, the insulating medium is insulating oil or insulating gas.

[0011] Furthermore, the medium charger and discharger comprises a storage tank, a pump and two conduits. The storage tank and the pump are arranged outside the shell. The two conduits respectively connect the pump with the storage tank and the pump with the storage bag.

[0012] Furthermore, the insulating medium is insulating oil, and a ferrite layer for shielding the magnetic field is attached to the surface of the elastic membrane facing the chamber.

[0013] Furthermore, the insulating medium is an insulating gas, and an electromagnetic shielding layer is attached to the surface of the elastic membrane facing the chamber.

[0014] Further, the number of the primary coils is nine, and they are arranged in three rows and three columns.

[0015] Another aspect of the present invention provides an energy-gathering coil device for wireless charging of rotary equipment, including the above-mentioned energy-gathering primary coil structure for wireless charging of rotary equipment, and also including a secondary coil structure for being set on the rotary underwater equipment.

[0016] The advantages of the present invention are:

[0017] 1. The energy-gathering primary coil structure for wireless charging of rotary equipment of the present invention has a primary coil array arranged on an arc-shaped elastic membrane that constitutes a part of a storage bag. When the underwater equipment is wirelessly charged, an insulating medium can be filled into the storage bag to cause the elastic membrane to deform and expand and fit the equipment. On the one hand, the position and orientation of the primary coil on the elastic membrane can be controlled so that the magnetic fields of each primary coil are superimposed at the position of the secondary coil, and the magnetic field strength reaches a maximum, thereby achieving an energy-gathering effect and improving the wireless charging efficiency; on the other hand, the seawater in the coil coupling area can be discharged so that there is almost no eddy current loss in the coil coupling area, thereby improving the power transmission efficiency, thereby ensuring efficient charging of different underwater equipment.

[0018] 2. In the present invention, the insulating medium and the shielding layer on the elastic membrane surround the primary coil and the secondary coil, and the high-frequency discrete electromagnetic field generated by the coil during the charging process can be confined in the space between the couplers, so that the high-frequency discrete electromagnetic field generated by the coil can be at least partially isolated, preventing it from freely diffusing in the water outside the coil coupling area and forming eddy currents to cause charging system parameter fluctuations and energy loss, thereby further improving the efficiency of underwater wireless charging.

[0019] 3. Compared with the existing wireless charging coil device, the energy-gathering coil device for wireless charging of rotary equipment of the present invention has a great advantage that the magnetic fields of the coils arranged in an array in the primary coil structure are superimposed at the secondary coil position, and the magnetic field strength reaches the maximum to achieve the energy-gathering effect. The seawater in the coil coupling area can also be discharged, so that there is almost no eddy current loss in the coil coupling area, thereby improving the wireless charging efficiency. The device can be adapted to the efficient charging of underwater rotary equipment of different volumes, positions and corresponding power requirements, and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or other features and advantages of the present invention will become more easily understood through the following description with reference to the accompanying drawings, which are not drawn to scale and some features are exaggerated or reduced to show details of specific components. In the accompanying drawings:

[0021] Figure 1 is a schematic three-dimensional diagram of the energy-gathering primary coil structure for wireless charging of rotary type equipment according to the present invention;

[0022] Figure 2 is a schematic cross-sectional view of the energy-gathering primary coil structure for wireless charging of rotary type equipment of the present invention, wherein the dielectric charger and discharger are omitted;

[0023] Figure 3 The working principle of the energy-gathering primary coil structure for wireless charging of rotary equipment of the present invention is Figure 1 ;

[0024] Figure 4 The working principle of the energy-gathering primary coil structure for wireless charging of rotary equipment of the present invention is Figure 2 .

[0025] In the figure: 1-shell; 2-elastic membrane; 3-chamber; 4-medium charger and discharger, 41-storage tank, 42-pump, 43-first conduit, 44-second conduit; 5-primary coil; 100-underwater equipment; 101-secondary coil. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings by means of exemplary embodiments of the present invention. It should be noted that the following detailed description of the present invention is only for the purpose of illustration, and is not intended to limit the present invention.

[0027] The present invention provides an energy-gathering primary coil structure for wireless charging of rotary equipment and an energy-gathering coil device for wireless charging of rotary equipment including the primary coil structure. The primary coil structure can be connected to an underwater wireless charging base station to dock with rotary underwater equipment that needs to be supplied with electric energy, and wireless charging is performed through magnetic field coupling between the primary coil and the secondary coil on the equipment. The present invention can control the shape of the elastic membrane by the amount of medium charged, thereby adjusting the orientation control of each primary coil, so that the magnetic field of each coil is superimposed at the position of the secondary coil to reach the maximum, and the adjustment is simple, which is suitable for charging equipment such as underwater vehicles of different volumes and positions and corresponding power requirements.

[0028] First, the energy-gathering primary coil structure for wireless charging of rotary type equipment provided by the present invention is described.

[0029] Reference Figure 1 and Figure 2 As an exemplary embodiment of the present invention, the energy-gathering primary coil structure for wireless charging of rotary equipment includes a shell 1 and an elastic membrane 2. The shell 1 and the elastic membrane 2 form a storage capsule with a sealed chamber 3. The chamber of the storage capsule can contain an insulating medium, which can be insulating oil or insulating gas. The energy-gathering primary coil structure also includes a dielectric charger 4 and a plurality of primary coils 5. The dielectric charger 4 is used to store the insulating medium and charge and discharge the medium. The primary coil 5 is used to dock with the secondary coil on the rotary underwater equipment to perform wireless power transmission on the equipment.

[0030] The housing 1 is in the shape of a hollow box with an open top, and the upper end surfaces of the two side walls are arc-shaped to correspond to the shape of the rotary equipment, that is, when charging, the arc-shaped end of the housing 1 faces the underwater equipment. The elastic membrane 2 is fixedly connected to the arc-shaped end surface of the upper end of the housing 1. The elastic membrane 2 is arc-shaped in a static state. The elastic membrane 2 is deformable and made of a deformable material. The amount of deformation is determined by the amount of medium in the storage capsule.

[0031] A plurality of primary coils 5 are embedded on the elastic membrane 2 and are arranged in multiple rows and columns at equal intervals parallel to the axis of the elastic membrane 2. In particular, the number of primary coils 5 is nine and arranged in three rows and three columns. This number is only an example and is not intended to limit the present invention. This equal interval arrangement of the primary coils allows the primary coils to evenly surround the charging equipment during charging docking. In this way, when the elastic membrane 2 is deformed, the orientation of the primary coils 5 thereon will change accordingly. Therefore, for underwater equipment of different volumes, different distances from the primary coil structure, and different power requirements, each primary coil 5 can adjust the orientation facing the secondary coil on the equipment, so that the magnetic field of each primary coil is superimposed at the position of the secondary coil to achieve the maximum magnetic field strength, produce the energy-gathering charging effect, and achieve the effect of a set of primary coils adapting to the secondary coils of different underwater equipment. In addition, after the elastic membrane 2 is deformed and expanded, it can fit with the equipment, thereby discharging the seawater in the coil coupling area, so that there is almost no eddy current loss in the coil coupling area, thereby improving the efficiency of power transmission.

[0032] The dielectric charger and discharger 4 is used to store insulating medium and to charge the insulating medium into the chamber 3 of the storage bag when the primary coil 5 and the secondary coil are docked for charging, so that the elastic membrane 2 is deformed and fits with the equipment to change the orientation of the primary coil 5, and after charging is completed, the charged insulating medium is discharged to allow the elastic membrane 2 to restore its deformation.

[0033] In some embodiments of the present invention, the medium charger 4 includes a storage tank 41, a pump 42 and two conduits, namely a first conduit 43 and a second conduit 44. The storage tank 41 and the pump 42 are arranged outside the housing 1. The first conduit 43 connects the pump 42 with the storage bag, and the second conduit 44 connects the pump 42 with the storage tank 41. The storage tank 41 and the pump 42 can be installed on the housing 1, or directly fixed to the base station.

[0034] When the insulating medium is insulating oil, since the oil itself can shield electricity, a ferrite layer for shielding the magnetic field can be attached to the surface of the elastic membrane 2 facing the chamber 3 to achieve an electromagnetic shielding effect. When the insulating medium is insulating gas, an electromagnetic shielding layer can be attached to the surface of the elastic membrane 2 facing the chamber 3. Figure 3 and Figure 4 As shown, the insulating medium in the storage capsule and the shielding layer on the elastic membrane can surround the primary coil and the secondary coil, thereby confining the high-frequency discrete electromagnetic field generated by the coil during the charging process to the space between the couplers, so that the high-frequency discrete electromagnetic field generated by the coil can be at least partially isolated, preventing it from freely diffusing in the water outside the coil coupling area and forming eddy currents to cause charging system parameter fluctuations and energy loss, further improving the efficiency of underwater wireless charging.

[0035] With the structure described above, refer to Figure 3 and Figure 4 ,in Figure 3The underwater equipment 100 is smaller in size, Figure 4 The underwater equipment 100 in the charging case is relatively large in size. When the equipment to be charged is relatively large in size, a larger amount of medium is filled into the storage capsule, and the curvature of the elastic membrane is smaller, so as to fit the equipment. For this purpose, a detection device can be set to monitor the model and specific position of the equipment to be charged, and a control loop is used to calculate the position of the secondary coil 101 in the equipment and the corresponding elastic membrane shape, and the medium is filled into the storage capsule chamber through a medium charger. When the storage capsule reaches a suitable position, the orientation of each coil is also controlled. At this time, the base station starts to emit high-frequency alternating current, and transmits electrical energy to the underwater equipment through the divergent magnetic field coupling of the primary coil and the secondary coil. After the energy transmission is completed, the equipment drives away, and the receiving end is separated from the primary coil structure. At the same time, the control pump discharges the insulating medium in the storage capsule, and the elastic membrane recovers its deformation. From then on, the work of the primary coil structure is completed, and the base station enters the standby state.

[0036] Therefore, as described above, in the energy-gathering primary coil structure for wireless charging of rotary equipment of the present invention, the primary coil array is arranged on an arc-shaped elastic membrane that constitutes a part of the storage capsule. When the underwater equipment is wirelessly charged, the storage capsule can be filled with an insulating medium to cause the elastic membrane to deform and expand and fit the equipment. On the one hand, this can control the position and orientation of the primary coil on the elastic membrane so that the magnetic fields of each primary coil are superimposed at the position of the secondary coil, and the magnetic field strength reaches a maximum, thereby achieving an energy-gathering effect and improving the wireless charging efficiency. On the other hand, the seawater in the coil coupling area can be discharged so that there is almost no eddy current loss in the coil coupling area, thereby improving the efficiency of power transmission and ensuring efficient charging of different underwater equipment.

[0037] Next, the energy-gathering coil device for wireless charging of rotary type equipment provided by the present invention is described.

[0038] As an exemplary embodiment of the present invention, the energy-gathering coil device for wireless charging of rotary equipment includes the above-mentioned energy-gathering primary coil structure for wireless charging of rotary equipment, and also includes a secondary coil structure for being set on the rotary underwater equipment, and the secondary coil structure includes a secondary coil that is docked with the primary coil array in the primary coil structure for wireless power transmission. The relevant structure, advantages, and working process of the coil device can be found in the above description of the primary coil structure, which will not be repeated here.

[0039] Compared with the existing wireless charging coil device, the energy-gathering coil device for wireless charging of rotary equipment of the present invention has a greater energy-gathering effect because the magnetic fields of the coils arranged in an array in the primary coil structure are superimposed at the secondary coil position, and the magnetic field strength reaches a maximum. The seawater in the coil coupling area can also be discharged, so that there is almost no eddy current loss in the coil coupling area, thereby improving the wireless charging efficiency. The device can be adapted to the efficient charging of underwater rotary equipment of different volumes and positions and corresponding power requirements, and has strong applicability.

[0040] Finally, it should be noted that the features mentioned and / or shown in the above description of the exemplary embodiments of the present invention may be combined in the same or similar manner into one or more other embodiments, combined with the features in other embodiments or substituted for the corresponding features in other implementations. The technical solutions obtained by these combinations or substitutions shall also be deemed to be included in the protection scope of the present invention.

Claims

1. An energy-gathering primary coil structure for wireless charging of rotary equipment, characterized in that: It includes a shell, an elastic membrane, a dielectric charger and a plurality of primary coils; The shell is in the shape of a hollow box with an open upper end, the elastic membrane is deformable, in an arc shape in a static state, and is fixedly connected to the upper end of the shell, and the shell and the elastic membrane form a storage bag with a sealed chamber; The plurality of primary coils are embedded on the elastic membrane and are arranged in a plurality of rows and columns at equal intervals parallel to the axis of the elastic membrane; The medium charger and discharger is used to store insulating medium and to charge the insulating medium into the chamber of the storage bag when the primary coil is docked with the secondary coil on the rotary underwater equipment to cause the elastic membrane to deform and fit the equipment to change the orientation of the primary coil, and to discharge the charged insulating medium after charging is completed to allow the elastic membrane to restore its deformation.

2. The energy-gathering primary coil structure for wireless charging of rotary equipment according to claim 1, characterized in that: The insulating medium is insulating oil or insulating gas.

3. The energy-gathering primary coil structure for wireless charging of rotary equipment according to claim 1 or 2, characterized in that: The medium charger and discharger comprises a storage tank, a pump and two conduits. The storage tank and the pump are arranged outside the shell. The two conduits respectively connect the pump with the storage tank and the pump with the storage bag.

4. The energy-gathering primary coil structure for wireless charging of rotary equipment according to claim 3, characterized in that: The insulating medium is insulating oil, and a ferrite layer for shielding a magnetic field is attached to the surface of the elastic film facing the chamber.

5. The energy-gathering primary coil structure for wireless charging of rotary equipment according to claim 3, characterized in that: The insulating medium is insulating gas, and an electromagnetic shielding layer is attached to the surface of the elastic membrane facing the chamber.

6. The energy-gathering primary coil structure for wireless charging of rotary equipment according to claim 1 or 2, characterized in that: The number of the primary coils is nine and they are arranged in three rows and three columns.

7. An energy-gathering coil device for wireless charging of rotary equipment, characterized in that: The invention comprises an energy-gathering primary coil structure for wireless charging of rotary equipment as claimed in any one of claims 1 to 6, and also comprises a secondary coil structure for being arranged on a rotary underwater equipment.

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