CN119049847B - Adjustable primary coil assembly, adjustment method and wireless power transmitting device - Google Patents
Adjustable primary coil assembly, adjustment method and wireless power transmitting device Download PDFInfo
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- CN119049847B CN119049847B CN202411545842.5A CN202411545842A CN119049847B CN 119049847 B CN119049847 B CN 119049847B CN 202411545842 A CN202411545842 A CN 202411545842A CN 119049847 B CN119049847 B CN 119049847B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 58
- 238000007599 discharging Methods 0.000 claims abstract description 28
- 230000001681 protective effect Effects 0.000 claims description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 claims 1
- 230000008602 contraction Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 238000003032 molecular docking Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000005429 filling process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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Abstract
In order to solve the problems of low utilization rate and high maintenance cost of the underwater charging base station caused by the fact that a plurality of underwater charging base stations are required to be established to carry primary coils with different specifications in order to realize underwater power supply of underwater equipment with different types at present, particularly realize underwater power supply of underwater equipment with large body difference, the invention provides an adjustable primary coil assembly, an adjusting method and a wireless power transmitting device. The adjustable primary coil assembly comprises a wire storage unit, a winding unit, a wire coiling and uncoiling unit, an oil charging and discharging assembly and a control module, wherein the control module can control the oil charging and discharging assembly and the winding unit to work according to the specifications of a secondary coil carried on underwater equipment, the primary coil matched with the secondary coil is wound, a coupler adapting to the charging requirements of the underwater equipment of different types is formed, the function of carrying the primary coils of different specifications on the same underwater charging base station is realized, the utilization rate of the underwater charging base station is improved, and the maintenance cost of the underwater charging base station is reduced.
Description
Technical Field
The invention relates to the technical field of power supply circuit devices or systems.
Background
Underwater equipment such as underwater vehicles and underwater submarines are applied to various fields such as underwater exploration by virtue of safety and intelligence. However, due to the limitation of the internal space and the quality of the underwater equipment, the defects of limited electric quantity, small cruising range, difficulty in guaranteeing the continuity of underwater operation and the like are commonly existed in the underwater equipment. The underwater wireless charging technology transmits energy through an electromagnetic field between the coupling coils, can conveniently supply underwater electric energy for underwater equipment, and improves the cruising range and the underwater continuous operation capability.
As shown in fig. 1-2, taking an example of charging an underwater vehicle of a certain model, the underwater wireless charging device comprises a primary coil 31, a primary circuit 32, a secondary coil 41 and a secondary circuit 42, wherein the primary coil 31 is installed on an underwater charging base station 1, the secondary coil 41 is installed on the abdomen of the underwater vehicle 2, the primary coil 32 is arranged in a base station control cabin of the underwater charging base station 1 and is connected with the primary coil 31, the secondary circuit 42 is arranged in the cabin of the underwater vehicle 2 and is connected with the secondary coil 41, the primary coil 31 and the secondary coil 41 form a coupler, when the underwater vehicle 2 sails above the underwater charging base station 1 and the primary coil 31 is aligned with the secondary coil 41, electric energy supplied by the underwater charging base station 1 is firstly inverted into high-frequency alternating current through a high-frequency inverter circuit in the primary coil 32 and is input into the primary coil 31, the primary coil 31 generates an alternating magnetic field under the action of the high-frequency alternating current, the alternating magnetic field and the secondary coil 41 are alternately excited into an electromotive force, and the direct current is converted into direct current through a rectifier circuit 42 into direct current through the underwater charging device for the underwater vehicle to be charged into electric energy through the wireless charging device 1.
The capacities of the battery packs of the different types of underwater equipment can be different according to the different body sizes of the underwater equipment; when the underwater wireless charging device is used for supplying the underwater electric energy to the small-capacity battery pack, the charging requirements of the coupler and the small-capacity battery pack are not matched, different charging strategies are required to be configured to adapt to the small-capacity battery pack, and a relatively complex control algorithm and a charging management system are required. Therefore, in order to improve the power transmission efficiency, shorten the charging time, simplify the control algorithm and the charging management system, it is often necessary to equip different types of underwater equipment, especially the underwater equipment with large body difference with couplers of different specifications, and further to equip the underwater equipment with primary coils of different specifications, and correspondingly, a plurality of underwater charging base stations are correspondingly required to be built to carry the primary coils of different specifications, so that the utilization rate of the underwater charging base stations is reduced, and the maintenance cost is increased.
Disclosure of Invention
In order to solve the technical problems of low utilization rate and high maintenance cost of the underwater charging base station caused by the fact that a plurality of underwater charging base stations are required to be established to carry primary coils of different specifications in order to realize underwater electric energy supply of underwater equipment of different types at present, particularly realize underwater electric energy supply of underwater equipment with large body difference, the invention provides an adjustable primary coil assembly, an adjusting method and a wireless electric energy transmitting device.
The technical scheme of the invention is as follows:
the adjustable primary coil assembly is characterized by comprising a protective shell, a bottom cover, a wire storage unit, a wire winding and unwinding unit, a winding unit, an oil filling and discharging assembly, a control module and an annular ferrite core;
the protection shell is in up-down butt joint with the bottom cover to form a closed cavity for accommodating and protecting the wire storage unit, the wire winding unit, the winding unit and the ferrite core;
the wire storage unit is used for storing wires;
the upper end of the wire extends out of the wire storage unit and then is connected with the winding unit, and the lower end of the wire is connected with the wire winding and unwinding unit;
The wire winding and unwinding unit is a spring type wire winding and unwinding mechanism and is used for assisting the wire to be continuously pulled out from the wire storage unit to realize wire unwinding when the upper end of the wire is pulled, and pulling the wire back into the wire storage unit to realize automatic wire winding when the upper end of the wire is not pulled;
The winding unit comprises a motor, a stud, a threaded engagement column and an annular oil bag, wherein an output shaft of the motor is axially connected with the lower end of the stud, the threaded engagement column is sleeved in the annular oil bag and fixedly connected with the annular oil bag, the stud is sleeved in the threaded engagement column and is in threaded fit connection with the threaded engagement column, the upper part of the stud is supported on a protective shell through a bearing, the annular oil bag is made of elastic materials, an ear seat is arranged on the outer wall of the annular oil bag, the upper end of a wire is connected with the ear seat, and heat conduction insulating oil is preset in the annular oil bag to balance internal and external pressure in an initial state;
The motor is operated to drive the stud to rotate, the stud drives the threaded engagement column to rotate and move up/down at one side, and then drives the annular oil bag to rotate and move up/down at one side;
The oil filling and discharging assembly is used for filling heat-conducting insulating oil into the annular oil bag to enable the diameter of the annular oil bag to be matched with the diameter of the secondary coil, and extracting and refluxing the heat-conducting insulating oil in the annular oil bag for storage to enable the annular oil bag to recover to an initial state;
The control module is used for controlling the winding unit and the oil filling and discharging assembly to work according to the structural parameters of the secondary coil, so as to ensure that the primary coil and the secondary coil which are finally formed are matched;
The annular ferrite core is sleeved outside the stud and positioned between the annular oil bag and the motor, and is used for enabling the magnetic field to be concentrated inside the primary coil, reducing magnetic leakage loss and enhancing the magnetic permeability of the magnetic circuit.
The wire storage unit comprises a hollow cone which is fixedly arranged in a protective shell and is large in upper part and small in lower part, an inner cavity of the hollow cone is used for accommodating the winding unit, a wire placing groove with a conical spiral line is formed in the outer surface of the hollow cone, a wire passing hole used for communicating the wire placing groove with the inner cavity of the hollow cone is formed in the upper part of the hollow cone, a wire is arranged and limited in the wire placing groove, the upper end of the wire is led out from the wire passing hole to the inner cavity area of the hollow cone and then is connected with an ear seat on the outer side wall of the annular oil bag, the lower end of the wire is connected with the wire collecting and releasing unit, and any end of the wire is pulled to enable the wire to move along the wire placing groove.
Further, the winding and unwinding unit comprises a shrinkage clamp, a clockwork spring and a spring placing cabin;
the shrinkage fixture comprises a deformable clamping piece, an upper end head with a wire clamping opening and a main body telescopic rod, wherein the upper end head with the wire clamping opening and the main body telescopic rod form a certain included angle so that the main body telescopic rod is in a state vertical to the bottom cover after the whole is assembled in place; the deformable clamping piece is used for limiting and installing the upper end head with the wire clamping opening in the wire placing groove of the wire storage unit, and can also ensure that the upper end head with the wire clamping opening can slide in the wire placing groove under the action of external force;
The spring placing cabin is arranged in the bottom cover, a mounting column for mounting the spring is arranged in the spring placing cabin, a polygonal through hole is formed in the side wall of the spring placing cabin, the fixed end of the spring is located at the center of the spring and fixedly connected with the mounting column, and the torque end of the spring is located at the outer side of the spring and is connected with the lower end of the main body telescopic rod of the shrinkage fixture after extending out of the polygonal through hole.
Further, the bottom of the spring placing cabin is connected with the bottom cover in a matched mode through a concave-convex structure.
When the lower parts of the first rod and the second rod are gripped to be close to each other, the transverse dimension of the X-shaped clamp is reduced so that the X-shaped clamp can be placed in a wire placing groove of a wire storage unit, and when the lower parts of the first rod and the second rod are released, the first rod and the second rod can be restored to an initial state under the action of the torsion spring, so that the transverse dimension of the X-shaped clamp is enlarged and can not be pulled out of the wire placing groove;
the upper end of the shrinkage fixture is provided with a mounting groove for accommodating the X-shaped fixture, and the upper end of the shrinkage fixture, the first rod and the second rod of the X-shaped fixture are connected into a whole through pins.
Further, balls are arranged on the first rod and the second rod of the X-shaped clamp in the contact area with the wire placing groove.
The oil filling and discharging assembly comprises an oil storage cabin cover, an oil storage cabin body, a pump, a first inner conduit, a flow valve, a second inner conduit, an electromagnetic valve and an outer conduit, wherein the pump, the first inner conduit, the flow valve, the second inner conduit, the electromagnetic valve and the outer conduit are sequentially connected, the oil storage cabin cover is arranged at the upper end of the oil storage cabin body and is in static sealing through a sealing ring to form a sealed oil storage cabin, heat-conducting insulating oil is stored in the oil storage cabin, an oil inlet and an oil outlet are formed below a shell of the pump, the first inner conduit, the flow valve, the electromagnetic valve and the second inner conduit are positioned in the oil storage cabin body, the outer conduit is positioned outside the oil storage cabin body, the outer conduit penetrates through the protection shell and is connected and communicated with an oil filling and discharging hole at the upper end of an annular oil bag, and dynamic sealing is adopted between the outer conduit and the oil filling and discharging hole, so that the outer conduit can rotate along with the annular oil bag under the condition that the sealing of the annular oil bag is guaranteed.
The invention also provides an adjusting method of the adjustable primary coil assembly, which is characterized by comprising the following steps of:
Step 1, after underwater equipment is in butt joint with an underwater charging base station, a control module controls an oil filling and discharging assembly to fill heat conduction insulating oil into an annular oil bag so as to expand the annular oil bag until the diameter of the annular oil bag is matched with the diameter of a secondary coil carried on the underwater equipment;
Step 2, the control module controls the winding unit to work, so that the lead is continuously drawn out from the wire storage unit and wound outside the annular oil bag until the number of turns of the wound primary coil is matched with that of the secondary coil carried on the underwater equipment, the primary coil is obtained at the moment, and then the wound primary coil is kept in a stable state through self-locking of a motor in the winding unit during charging;
step 3, after the charging is finished, the control module controls the winding unit to work so that the wires wound outside the annular oil bag are reversely wound and separated, and meanwhile, the wires separated from the annular oil bag are recovered into the wire storage unit by the wire winding and unwinding unit;
And 4, controlling the oil filling and discharging assembly to extract the heat conduction insulating oil from the annular oil bag by the control module so as to restore the annular oil bag to an initial state.
The invention also provides a wireless electric energy transmitting device which is characterized by comprising a primary coil assembly and a primary circuit, wherein the primary coil assembly adopts the adjustable primary coil assembly, the primary circuit adopts a primary circuit with adjustable compensation parameters, and the primary circuit with adjustable compensation parameters comprises a variable capacitor and a variable inductance which are used for realizing adjustment of the compensation parameters so as to enable the primary coil in the adjustable primary coil assembly to be in a resonance state.
The invention also provides a method for adjusting the wireless electric energy transmitting device, which is characterized by comprising the following steps:
step 1, a control module controls an oil filling and discharging assembly to fill heat conduction insulating oil into an annular oil bag so that the diameter of the annular oil bag is matched with the diameter of a secondary coil;
Step 2, the control module calculates the number of turns of the primary coil required to be wound according to the diameter and the number of turns of the secondary coil carried on the underwater equipment and the current diameter of the annular oil bag;
Step 3, the control module calculates the number of turns required to be operated of the output shaft of the motor in the winding unit according to the number of turns of the primary coil required to be wound, the current diameter of the annular oil bag and the number of turns of the primary coil capable of being wound when the output shaft of the motor in the winding unit is operated for one turn, and controls the start and stop of the motor based on the number of turns required to be operated of the output shaft of the motor;
step 4, the control module obtains the resonance frequency of a secondary coil mounted on the underwater equipment, and adjusts the output frequency of a primary inverter in a primary circuit with adjustable compensation parameters to be the resonance frequency of the secondary coil;
Step 5, the control module detects zero crossing points of the output current and the output voltage of the primary side inverter in the primary side circuit with adjustable compensation parameters, and the phase difference between the output current and the output voltage of the primary side inverter is calculated according to the detected zero crossing points of the output current and the output voltage of the primary side inverter;
and 6, the control module adjusts a variable capacitor and a variable inductance in the primary side circuit with adjustable compensation parameters based on the phase difference between the output current and the output voltage of the primary side inverter until the wireless electric energy transmitting device is in a resonance state.
The invention has the advantages that:
1. The adjustable primary coil assembly can adjust the diameter, the number of turns and the degree of density of the primary coil, so that the adjustable primary coil assembly can be matched with secondary coils with different specifications, which are carried on different types of underwater equipment, and a coupler which is suitable for the charging requirements of the different types of underwater equipment is formed. Therefore, after the adjustable primary coil assembly is adopted, the function of carrying the primary coils with different specifications on the same underwater charging base station can be realized, the utilization rate of the underwater charging base station is improved to a great extent, and the maintenance cost of the underwater charging base station is reduced.
2. The adjustable primary coil assembly can be realized by controlling the oil filling amount of the annular oil bag when the diameter of the primary coil is adjusted, and can be realized by controlling the rotating speed of the motor and the lifting height of the annular oil bag when the density and the number of turns of the primary coil are adjusted, so that the adjustable primary coil assembly has no adjustment gear limit and is flexible to adjust.
3. The annular oil bag in the adjustable primary coil assembly has a heat conduction function, and can lead out heat generated by the primary coil to outside seawater through the protective shell, so that the working reliability of the primary coil is improved.
4. The wireless electric energy transmitting device comprises the adjustable primary coil assembly and the improved primary circuit with adjustable compensation parameters, has the function of adjusting the electric energy transmitting power, and can be matched with secondary coils with different specifications.
5. The adjustable primary coil assembly and the wireless electric energy transmitting device can be sold independently, so that the use requirements of different scenes are met.
Drawings
Fig. 1 is a schematic diagram of a model of an underwater vehicle about to be docked for charging with an underwater charging base station.
Fig. 2 is a schematic diagram of an underwater wireless charging device.
Fig. 3 is a general assembly schematic of the adjustable primary coil assembly of the present invention.
Fig. 4 is a cross-sectional view (with the clockwork spring removed) of the adjustable primary coil assembly of the present invention.
Fig. 5 is an enlarged view of a portion of the toroidal oil pocket, toroidal ferrite core, and output shaft of the motor of fig. 4.
Fig. 6 is a schematic view of the structure of the annular oil bladder in the adjustable primary coil assembly of the present invention.
Fig. 7 is a schematic diagram of a positional relationship between a wire storage unit and a first half shell in an adjustable primary coil assembly according to the present invention.
Fig. 8 is a schematic view of the structure of the pinch clamp in the adjustable primary coil assembly of the present invention.
Fig. 9 is an enlarged view of the upper portion of the pinch clamp of fig. 8.
Fig. 10 is a schematic view showing the connection between the retractable clip (only the main body retractable rod portion of the retractable clip is shown) and the clockwork spring in the adjustable primary coil assembly of the present invention.
Fig. 11 is a schematic diagram of the positional relationship between the base and the spring placement chamber in the adjustable primary coil assembly of the present invention.
Fig. 12 is a schematic view of the structure of the spring placement chamber in the adjustable primary coil assembly of the present invention.
Fig. 13 is a schematic diagram showing the storage state of the wires in the adjustable primary coil assembly according to the present invention.
Fig. 14 is a schematic structural view of an oil filling and discharging assembly in an adjustable primary coil assembly according to the present invention.
Fig. 15 is a cross-sectional view of an oil fill and drain assembly in an adjustable primary coil assembly of the present invention.
Fig. 16 is an example of a primary side circuit with adjustable compensation parameters in a wireless power transmitting apparatus of the present invention.
Reference numerals illustrate:
1-an underwater charging base station;
2-an underwater vehicle;
31-primary side coil, 32-primary side circuit;
41-secondary side coil, 42-secondary side circuit;
5-protective housing, 51-line hole;
6-bottom cover, 61-bulge, 62-plane spiral guide groove;
7-wire storage units, 71-hollow cones, 72-wire placing grooves, 73-wire passing holes and 74-cylindrical surfaces;
8-coiling and uncoiling units, 81-shrinkage clamps, 811-deformable clamping pieces, 8111-first rods, 8112-second rods, 8113-torsion springs, 812-wire clamping openings, 813-upper ends, 814-main body telescopic rods, 815-mounting grooves, 82-clockwork springs, 83-spring placing cabins, 831-polygonal through holes and 832-mounting columns;
9-winding units, 91-motors, 92-studs, 93-threaded connection columns, 94-annular oil bags, 941-lugs, 942-oil filling and draining holes and 95-bearings;
10-an oil filling and draining assembly, 101-an oil storage cabin cover, 102-an oil storage cabin body, 103-a pump, 104-a first inner conduit, 105-a flow valve, 106-a second inner conduit, 107-an electromagnetic valve, 108-a second oil inlet and outlet, 109-an outer conduit and 110-a first oil inlet and outlet;
11-ring ferrite cores.
Detailed Description
The present invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 3 to 15, the adjustable primary coil assembly provided by the invention comprises a protective casing 5, a bottom cover 6, a wire storage unit 7, a wire winding and unwinding unit 8, a winding unit 9, an oil filling and unwinding assembly 10, a control module (which can be realized by the prior conventional technical means and is not shown in the figure) and an annular ferrite core 11.
The protection shell 5 is in up-down butt joint with the bottom cover 6 to form a closed cavity for accommodating and protecting the wire storage unit 7, the wire winding unit 8, the winding unit 9 and the annular ferrite core 11, and a pipeline hole 51 is formed in the upper end of the protection shell 5. For easy assembly, as shown in fig. 3 and 7, the protection casing 5 is a casing formed by splicing a first half casing and a second half casing, wherein the upper end of the casing is closed, and the lower end of the casing is open.
The wire storage unit 7 is used for storing wires. As shown in fig. 4 and 7, the wire storage unit 7 includes a hollow cone 71 having a large upper part and a small lower part fixedly provided in the protective housing 5, an inner cavity of the hollow cone 71 is used for accommodating the annular ferrite core 11 and the winding unit 9, a conical spiral wire placing groove 72 is processed on an outer surface of the hollow cone 71, and a wire passing hole 73 for communicating the wire placing groove 72 with the inner cavity of the hollow cone 71 is processed on an upper part of the hollow cone 71. As shown in fig. 7, the hollow cone 71 may be formed by a material reduction process based on a solid cylinder, and after the hollow cone 71 is formed, a cylindrical surface 74 outside the hollow cone 71 may be used as a mounting surface for the hollow cone and the protective housing 5, so that the hollow cone 71 is more conveniently and fixedly mounted in the protective housing 5.
The wire is arranged and limited in the wire placing groove 72 on the outer surface of the hollow cone 71, after being arranged in place, the wire is in a conical spiral line shape with a large upper part and a small lower part, as shown in fig. 13, the upper end of the wire is led out from the wire passing hole 73 at the upper part of the hollow cone 71 to the inner cavity area of the hollow cone 71 and then is connected with the outer side wall of the annular oil bag 94 in the winding unit 9, the lower end of the wire is connected with the upper end 813 of the shrinkage fixture 81 in the wire winding and unwinding unit 8, and any end of the wire can be moved along the wire placing groove 72 by pulling.
The winding and unwinding unit 8 is a spring winding and unwinding mechanism and is used for assisting the wire to be continuously pulled out from the wire placing groove to realize unwinding when the upper end of the wire is pulled, and pulling the wire back into the wire placing groove to realize automatic winding when the upper end of the wire is not pulled.
As shown in fig. 4, 8 to 12, the pay-off and take-up unit 8 in this embodiment includes a shrinkage jig 81, a mainspring 82, and a spring placement chamber 83.
The shrinkage fixture 81 comprises a deformable clamping piece 811, an upper end 813 with a wire clamping opening 812 and a main body telescopic rod 814, wherein the upper end 813 with the wire clamping opening 812 and the main body telescopic rod 814 form a certain included angle so that the main body telescopic rod 814 is in a state perpendicular to the bottom cover 6 after the whole is assembled in place, the deformable clamping piece 811 is used for limiting the upper end 813 with the wire clamping opening 812 in the wire placing groove 72 of the wire storage unit 7 and also can ensure that the upper end 813 with the wire clamping opening 812 can slide in the wire placing groove 72 under the action of external force, the upper end 813 with the wire clamping opening 812 is connected with the lower end of a wire in the wire placing groove 72 through the wire clamping opening 812, the main body telescopic rod 814 can stretch to be longer and shrink to be shorter under the action of external force, and the lower end of the main body telescopic rod 814 is used for being fixedly connected with the torque end of the spring 82. Specifically, as shown in fig. 9, the deformable clamping member 811 in this embodiment includes an X-shaped clamp and a torsion spring 8113, the X-shaped clamp is composed of a first rod 8111 and a second rod 8112 that are hinged, the two torsion arms of the torsion spring 8113 are respectively connected to the middle upper portions of the first rod 8111 and the second rod 8112, when the lower portions of the first rod 8111 and the second rod 8112 are gripped to approach each other, the lateral dimensions of the X-shaped clamp are reduced so that the X-shaped clamp can be installed in the wire placing groove 72 of the wire storage unit 7, and when the lower portions of the first rod 8111 and the second rod 8112 are released, the first rod 8111 and the second rod 8112 are restored to an initial state under the action of the torsion spring 8113 so that the lateral dimensions of the X-shaped clamp are enlarged so as to be blocked in the wire placing groove 72. Correspondingly, the upper end 813 of the shrinkage clamp 81 is provided with a mounting groove 815 for accommodating the X-shaped clamp, and the upper end 813 of the shrinkage clamp 81, the first rod 8111 and the second rod 8112 of the X-shaped clamp can be connected into a whole through a pin. Preferably, balls can also be mounted on the first and second rods 8111, 8112 of the X-clamp in the area in contact with the wire-placing groove 72 so that it moves more smoothly within the wire-placing groove 72.
The clockwork spring 82 is disposed in a spring placement compartment 83, and the spring placement compartment 83 is fixedly mounted in the bottom cover 6. The spring placing cabin 83 is internally provided with a mounting column 832 for mounting the spring 82, the side wall of the spring placing cabin 83 is provided with a polygonal through hole 831, the fixed end of the spring 82 is positioned at the center of the spring 82 and is fixedly connected with the mounting column 832 in the spring placing cabin 83, and the torque end of the spring 82 is positioned at the outer side of the spring 82 and extends out of the polygonal through hole 831 on the side wall of the spring placing cabin 83 and is then connected with the lower end of the main body telescopic rod 814 of the shrinkage fixture 81. For convenience in processing and assembly, the spring placement cabin 83 and the bottom cover 6 may be cooperatively connected by a concave-convex structure, for example, a protrusion 61 may be disposed at the center of the bottom surface of the bottom cover 6, and a groove (not shown in the figure) in interference fit connection with the protrusion 61 is correspondingly disposed at the bottom of the spring placement cabin 83, so that the fixed connection between the spring placement cabin 83 and the bottom cover 6 is realized by the interference fit of the protrusion 61 and the groove.
The principle of the pay-off and take-up unit 8 in this embodiment is:
when the wire is to be paid out, the upper end of the wire is pulled, the lower end of the wire pulls the upper end 813 of the shrinkage jig 81 to slide upward along the wire placing groove 72, so that the main body telescopic rod 814 is gradually stretched and lengthened, and at the same time, the main body telescopic rod 814 is continuously rotated around the axis of the wire placing groove 72, so that the wire can be continuously drawn out from the wire placing groove 72, and as the shrinkage jig 81 moves, the spring 82 is gradually tensioned to twist in the plane of the spring 82 and a part of the spring is gradually drawn out from the spring placing cabin 83.
When the wire is required to be wound, the upper end of the wire is not pulled any more, at this time, the spring 82 is gradually restored to the initial state from the tensioned state, during which the portion of the spring 82 drawn out of the spring placement compartment 83 is gradually retracted into the spring placement compartment 83 and drives the shrinkage jig 81 to continuously rotate around the axis of the wire placement slot 72 (the rotation direction is opposite to the rotation direction during wire unwinding), so that the upper end 813 of the shrinkage jig 81 slides downward along the wire placement slot 72 and the main body telescopic rod 814 shrinks and shortens, and the wire is continuously pulled to move downward along the wire placement slot 72, thereby realizing the recovery of the wire.
Since the movement of the portion of the power spring 82 that is withdrawn from the spring placement compartment 83 in the bottom cover 6 is involved during both winding and unwinding, the present invention may further provide a planar spiral guide groove 62 on the inner bottom surface of the bottom cover 6 for providing a movement guide for the power spring 82 in order to make the winding and unwinding process more stable.
As shown in fig. 4-6, the winding unit 9 includes a motor 91, a stud 92, a threaded engagement post 93, and an annular oil bladder 94. The motor 91 is fixedly arranged in an inner cavity of the hollow cone 71 in the wire storage unit 7, an output shaft of the motor 91 is axially connected with the lower end of the stud 92 and used for driving the stud 92 to rotate, the threaded connection column 93 is sleeved in the annular oil bag 94 and fixedly connected with the threaded connection column, the stud 92 is sleeved in the threaded connection column 93 and is in threaded fit connection with the threaded connection column, the upper portion of the stud 92 is supported on the protection shell 5 through a bearing 95, the annular oil bag 94 is made of an elastic material, an ear seat 941 used for connecting one end of a wire with the outer wall of the annular oil bag 94 is arranged on the outer wall of the annular oil bag 94, the wire can be bound on the ear seat 941, or after the wire passes through the ear seat 941, the wire is fixed at the ear seat 941 through an anti-disengaging buckle by connecting the end of the wire, the ear seat 941 can be made of the same material as the annular oil bag 94 in consideration of expansion effect of the annular oil bag 94, and the annular oil bag 94 is integrally processed. The upper end of the annular oil bag 94 is also provided with an oil filling and discharging hole 942.
The working principle and process of the winding unit 9 are as follows:
in the initial state, a certain amount of heat conducting insulating oil is preset in the annular oil bag 94 to balance the internal and external pressures, before the primary coil is wound, a certain amount of heat conducting insulating oil is filled into the annular oil bag 94 through the oil filling and discharging assembly 10 according to the size of the secondary coil carried on the underwater equipment to be charged, so that the diameter of the annular oil bag 94 (the diameter of the primary coil formed by winding is determined by the size of the annular oil bag 94) is matched with the diameter of the secondary coil, and in general, the docking deviation between the underwater equipment and the underwater charging base station is considered, the diameter of the primary coil is larger than that of the secondary coil, and the specific size can be calculated by the conventional technical means.
When the motor 91 is operated, the stud 92 is driven to rotate, and the stud 92 drives the threaded engagement post 93 to rotate and move up/down at the same time, so that the annular oil bag 94 sleeved outside the threaded engagement post 93 is driven to rotate and move up/down at the same time.
When the annular oil bag 94 rotates and moves upwards, the lead is pulled to be gradually pulled out of the wire placing groove 72 of the wire storage unit 7 and wound on the outer wall of the annular oil bag 94 to form a primary coil, after the primary coil is wound in place, the wound primary coil keeps the current number of turns unchanged during charging under the self-locking control of the motor 91, during winding, the density of the primary coil can be adjusted by adjusting the rotating speed of the motor 91, the faster the rotating speed of the motor 91, the denser the wound primary coil, and the number of turns of the primary coil can be adjusted by adjusting the axial stroke of the annular oil bag 94. In addition, the annular oil bag 94 is filled with heat conducting insulating oil, so that heat generated during the operation of the primary coil can be led out to seawater through the protective shell 5, and the operation reliability of the primary coil is improved.
Conversely, when the wire needs to be retracted, the motor 91 drives the annular oil bag 94 to move downwards, and the wire is reversely wound and separated from the annular oil bag 94, and is pulled downwards to be retracted into the wire placing groove 72 of the wire storage unit 7 under the action of the clockwork spring 82 in the wire winding and unwinding unit 8.
The oil filling and discharging assembly 10 is used for filling heat-conducting insulating oil into the annular oil bag 94, and pumping out a certain amount of heat-conducting insulating oil in the annular oil bag 94 and refluxing for storage, so that the annular oil bag 94 is restored to an initial state.
As shown in fig. 4, 14-15, the oil filling and draining assembly 10 is disposed below the bottom cover 6, and includes an oil storage hatch 101, an oil storage hatch 102, a pump 103, a first inner conduit 104, a flow valve 105, a second inner conduit 106, a solenoid valve 107, and an outer conduit 109, which are sequentially connected. The oil storage cabin cover 101 is arranged at the upper end of the oil storage cabin body 102 and is statically sealed through a sealing ring to form a sealed oil storage cabin, heat conduction insulating oil is stored in the oil storage cabin, a first oil inlet and outlet 110 is formed below a shell of the pump 103, the first inner conduit 104, the flow valve 105, the electromagnetic valve 107 and the second inner conduit 106 are arranged in the oil storage cabin body 102, the outer conduit 109 is arranged outside the oil storage cabin body 102, one end of the outer conduit 109 is connected and communicated with a second oil inlet and outlet 108 on the oil storage cabin body 102, the other end of the outer conduit 109 passes through a pipeline hole 51 on the protection shell 5 and is communicated with an oil filling and draining hole 942 at the upper end of the annular oil bag 94, dynamic sealing is adopted between the outer conduit 109 and the oil filling and draining hole 942 of the annular oil bag 94, and the outer conduit 109 can rotate along with the annular oil bag 94 under the condition that the sealing of the annular oil bag 94 is ensured.
The control module is used for controlling the operation of the pump 103, the flow valve 105 and the solenoid valve 107 in the oil filling and discharging assembly 10, and for controlling the operation of the motor 91 in the winding unit 9.
Before oil filling, the control module determines the diameter of the annular oil bag matched with the secondary coil according to the diameter of the secondary coil carried on the underwater equipment and the docking deviation of the underwater equipment and the underwater charging base station, and when the control module detects that the diameter of the annular oil bag 94 is matched with the secondary coil during oil filling, the control module indicates that the oil filling amount meets the requirement, and at the moment, the control module closes the pump 103 and the electromagnetic valve 107 in the oil filling and discharging assembly 10 to stop oil filling.
After the oil filling is finished and before the primary coil is wound, the control module calculates the number of turns of the primary coil which needs to be wound according to the diameter and the number of turns of the secondary coil which is carried on underwater equipment and the current diameter of the annular oil bag, further calculates the number of turns of the output shaft of the motor 91 in the winding unit which needs to be operated, and controls the starting and stopping of the motor 91 based on the number of turns.
The annular ferrite core 11 is sleeved outside the stud 92 and is positioned between the annular oil bag 94 and the motor 91, so that a magnetic field is concentrated inside the primary coil, the magnetic leakage loss is reduced, and the magnetic permeability of the magnetic circuit is enhanced.
The working principle and the adjusting method of the adjustable primary coil assembly are as follows:
When the underwater equipment needs to be charged and is in butt joint with the underwater charging base station, the control module firstly controls the oil charging and discharging assembly 10 to charge heat conduction insulating oil into the annular oil bag 94 so that the annular oil bag 94 expands until the diameter of the annular oil bag is matched with the diameter of a secondary coil carried on the underwater equipment;
After the oil filling is finished, the control module controls the motor 91 in the winding unit 9 to drive the annular oil bag 94 to move upwards while rotating, so that the lead is continuously drawn out of the wire placing groove 72 of the wire storage unit 7 and wound outside the annular oil bag 94 to form a primary coil, the number of turns of the primary coil is gradually increased along with the continuous winding of the lead, and when the number of turns of the primary coil is matched with the number of turns of a secondary coil carried on underwater equipment, the control module controls the motor 91 to stop rotating and keep a self-locking state, so that the wound primary coil keeps a stable state during charging.
When the underwater equipment is charged, the control module firstly starts the motor 91, the motor 91 drives the annular oil bag 94 to move downwards while rotating, so that the wires wound outside the annular oil bag 94 are wound out from the annular oil bag 94 and are separated, meanwhile, the wires separated from the annular oil bag 94 are automatically retracted into the wire placing groove 72 of the wire storage unit 7 under the action of the spring 82 and the shrinkage fixture 81 in the wire winding and unwinding unit 8, and after the wire winding is completed, the control unit controls the oil charging and unwinding assembly 10 in the winding unit 9 to continuously extract heat-conducting insulating oil from the annular oil bag 94 until the annular oil bag 94 is restored to an initial state. Specifically, before the heat-conducting insulating oil is extracted from the annular oil bag 94, the control module can determine the oil pumping flow and the oil pumping time required by oil pumping according to the oil filling flow and the oil filling time before winding the primary coil, so as to extract the corresponding heat-conducting insulating oil from the annular oil bag 94, and achieve the purpose of recovering the initial state of the annular oil bag 94 after oil pumping.
Besides the adjustable primary coil assembly, the invention also provides a wireless electric energy transmitting device with adjustable electric energy transmitting power, which comprises the primary coil assembly and a primary circuit, wherein a primary coil in the primary coil assembly is connected with the primary circuit to be connected into a loop of the primary circuit, the primary coil assembly is the adjustable primary coil assembly provided by the invention, and because parameters of the primary coil in the adjustable primary coil assembly can be adjusted according to parameters of a secondary coil carried on underwater equipment, the primary circuit needs to adopt the primary circuit with adjustable compensation parameters to maintain the resonance state of the primary coil, so that the electric energy transmission efficiency is optimal.
As shown in fig. 16, taking the LCC resonant topology commonly used in the primary circuit as an example, by using a variable inductor to replace the original fixed inductor as a compensation inductor and using a variable capacitor to replace the original fixed capacitor as a primary parallel compensation capacitor, the primary circuit with the original fixed compensation parameter can be improved to a primary circuit with an adjustable compensation parameter. Assuming resonant frequencyThe resonance condition is as follows:
when the primary coil is enlarged, the inductance value of the primary coil Increasing, in order to maintain resonance, the inductance value of the variable inductanceTo be increased, the capacitance value of the variable capacitorReduction is required. Inductance value of variable inductorAnd the capacitance value of the variable capacitorThe specific value of the adjustment can be calculated by the resonance condition.
For the primary side circuit adopting other types of resonance topologies, the method for improving the primary side circuit into the primary side circuit with the adjustable compensation parameters is similar to the principle of the primary side circuit adopting the LCC resonance topology, and is not repeated.
The method for adjusting the wireless electric energy transmitting device with adjustable electric energy transmitting power comprises the following steps:
Step 1, a control module controls the oil filling and discharging assembly 10 to fill heat conduction insulating oil into the annular oil bag 94, so that the diameter of the annular oil bag 94 is matched with the diameter of a secondary coil carried on underwater equipment;
step 2, the control module calculates the number of turns of the primary coil required to be wound according to the diameter and the number of turns of the secondary coil carried on the underwater equipment and the current diameter of the annular oil bag 94;
step 3, the control module calculates the number of turns required to be operated of the output shaft of the motor 91 according to the number of turns of the primary coil required to be wound, the current diameter of the annular oil bag 94 and the number of turns of the primary coil capable of being wound when the output shaft of the motor 91 is operated for one turn, and controls the start and stop of the motor 91 based on the number of turns required to be operated of the output shaft of the motor 91;
step 4, the control module obtains the resonance frequency of a secondary coil mounted on the underwater equipment, and adjusts the output frequency of a primary inverter in a primary circuit with adjustable compensation parameters to be the resonance frequency of the secondary coil;
Step 5, the control module detects zero crossing points of the output current and the output voltage of the primary side inverter in the primary side circuit with adjustable compensation parameters, and the phase difference between the output current and the output voltage of the primary side inverter is calculated according to the detected zero crossing points of the output current and the output voltage of the primary side inverter;
and 6, the control module adjusts a variable capacitor and a variable inductance in the primary side circuit with adjustable compensation parameters based on the phase difference between the output current and the output voltage of the primary side inverter until the wireless electric energy transmitting device is in a resonance state.
In the above step 1, when the diameter of the annular oil pocket 94 is larger than the diameter of the secondary coil, the diameter of the annular oil pocket 94 is considered to be matched with the diameter of the secondary coil, and the diameter of the annular oil pocket 94 is more or less larger than the diameter of the secondary coil can be determined according to the docking deviation between the underwater equipment and the underwater charging base station.
The relationship between the diameter of the annular oil pocket 94 and the oil filling amount can be established through simulation in advance for monitoring the diameter of the annular oil pocket 94, and the diameter of the annular oil pocket 94 can be obtained through calculating the oil filling amount in real time in the oil filling process.
Claims (10)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105826066A (en) * | 2016-05-16 | 2016-08-03 | 上海墨百意信息科技有限公司 | Coil applied to wireless charging system and inductance adjusting method |
| CN107068360A (en) * | 2017-01-06 | 2017-08-18 | 南通华为电力设备有限公司 | Large-area Magnetic Field equilibrium array coil and regulating step and its wireless charging device |
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| US6950005B2 (en) * | 2003-06-30 | 2005-09-27 | International Business Machines Corporation | Adjustable coilform for variable inductance |
| JP4976818B2 (en) * | 2006-11-08 | 2012-07-18 | 株式会社東芝 | Transformer coil transport apparatus and transformer coil transport method |
| CN104810142B (en) * | 2015-04-27 | 2016-11-23 | 明珠电气股份有限公司 | A kind of wind-power electricity generation hermetically sealed combined transformer of adjustable volume |
| CN208094242U (en) * | 2018-04-23 | 2018-11-13 | 天津大学 | A kind of underwater fast wireless charging unit |
| CN221687334U (en) * | 2024-03-26 | 2024-09-10 | 九州无限(辽宁)充电设备有限公司 | A coil mechanism with variable inductance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826066A (en) * | 2016-05-16 | 2016-08-03 | 上海墨百意信息科技有限公司 | Coil applied to wireless charging system and inductance adjusting method |
| CN107068360A (en) * | 2017-01-06 | 2017-08-18 | 南通华为电力设备有限公司 | Large-area Magnetic Field equilibrium array coil and regulating step and its wireless charging device |
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