CN115985643A - Wireless charging magnetic core transformer, control circuit and equipment - Google Patents
Wireless charging magnetic core transformer, control circuit and equipment Download PDFInfo
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- CN115985643A CN115985643A CN202211633812.0A CN202211633812A CN115985643A CN 115985643 A CN115985643 A CN 115985643A CN 202211633812 A CN202211633812 A CN 202211633812A CN 115985643 A CN115985643 A CN 115985643A
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- 238000004804 winding Methods 0.000 claims abstract description 42
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention relates to the field of transformers, in particular to a wireless charging magnetic core transformer, a control circuit and equipment, which comprise a circuit board, wherein the circuit board comprises a top layer circuit, a bottom layer circuit and a central through hole, the top layer circuit and the bottom layer circuit are respectively formed by winding a copper wire from outside to inside by taking the central through hole as the center, and the top layer circuit and the bottom layer circuit are connected through a through hole on the circuit board to form a coil winding; the wireless charging magnetic core transformer further comprises a first magnetic core and a second magnetic core, wherein the first magnetic core penetrates through the central through holes of the first number of circuit boards to serve as a primary side of the wireless charging magnetic core transformer, and the second magnetic core penetrates through the central through holes of the second number of circuit boards to serve as a secondary side of the wireless charging magnetic core transformer. Copper wires are arranged on the top layer circuit and the bottom layer circuit to replace the traditional coil windings, so that the power loss of the wireless charging magnetic core transformer can be reduced; and connecting the second openings of the other circuit board through the first openings on the circuit boards to form a cascade of a plurality of circuit boards so as to adjust the coil ratio of the wireless charging magnetic core transformer.
Description
Technical Field
The invention relates to the field of transformers, in particular to a wireless charging magnetic core transformer, a control circuit and equipment.
Background
A transformer is a device that changes voltage using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and a magnetic core. Among the correlation technique, the transformer mainly forms through setting up the coil around the magnetic core, and coil quantity also can correspondingly increase when the induced voltage that needs is great, generates heat when having the electric current to pass through in the coil and can increase the power loss of transformer, and long-time work can have the potential safety hazard. In addition, the primary coil and the secondary coil in the existing transformer are fixed on the magnetic core, and the flexible adjustment degree is not strong.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the embodiment of the invention provides a wireless charging magnetic core transformer, a control circuit and equipment. Copper wires are arranged on a top layer circuit and a bottom layer circuit in the circuit board to replace the traditional coil winding, so that the power loss of the wireless charging magnetic core transformer can be reduced; and connecting the second openings of the other circuit board through the first openings on the circuit boards to form a cascade of a plurality of circuit boards so as to adjust the coil ratio of the wireless charging magnetic core transformer. In addition, the inductance value of the wireless charging magnetic core transformer is changed by adjusting the first distance between the primary side of the wireless charging magnetic core transformer and the secondary side of the wireless charging magnetic core transformer, and the flexibility of the wireless charging magnetic core transformer is improved.
In a first aspect, an embodiment of the present invention provides a wireless charging magnetic core transformer, including a circuit board, where the circuit board includes a top layer circuit, a bottom layer circuit, and a central through hole, the top layer circuit is formed by winding a copper wire from outside to inside in an anticlockwise direction with the central through hole as a center, the bottom layer circuit is formed by winding a copper wire from outside to inside in a clockwise direction with the central through hole as a center, and the top layer circuit and the bottom layer circuit are connected through a via hole on the circuit board to form a coil winding; and the magnetic cores comprise a first magnetic core and a second magnetic core, the first magnetic core penetrates through the central through holes of the circuit boards in the first quantity to serve as the primary side of the wireless charging magnetic core transformer, and the second magnetic core penetrates through the central through holes of the circuit boards in the second quantity to serve as the secondary side of the wireless charging magnetic core transformer.
The technical scheme of the first aspect of the invention has at least one of the following advantages or beneficial effects: be provided with top layer circuit and the bottom circuit that is formed by copper wire coiling central through-hole through the circuit board, top layer circuit and bottom circuit pass through the via hole connection on the circuit board and have replaced traditional coil winding in order to form coil winding, can reduce the power loss of wireless charging magnetic core transformer, first magnetic core passes the central through-hole of first quantity circuit board and forms wireless charging magnetic core transformer and once inclines, the second magnetic core passes the central through-hole of second quantity circuit board in order to form wireless charging magnetic core transformer secondary side, through adjusting first quantity and second quantity, can adjust the coil ratio of wireless charging magnetic core transformer once and wireless charging magnetic core transformer secondary side in a flexible way, the flexibility ratio of wireless charging magnetic core transformer has been improved.
Furthermore, the circuit board is also provided with a first opening and a second opening, wherein the second opening of one circuit board is used for connecting with the first opening of the other circuit board to form cascade connection.
Further, a first distance is provided between the primary side of the transformer and the secondary side of the transformer.
Further, the first magnetic core and the second magnetic core are both made of ferrite materials, and the operating frequency of the first magnetic core and the operating frequency of the second magnetic core are 18kHz to 1MHz.
Further, the first magnetic core and the second magnetic core are both magnetic cores with the shape of E.
In a second aspect, an embodiment of the present invention provides a control circuit for a wireless charging magnetic core transformer, where the control circuit includes the wireless charging magnetic core transformer described in the above technical solution of the first aspect and more than two cascade-connected first circuits, each first circuit includes a switch module, each switch module is connected in series with at least one winding coil in a primary side, two adjacent first circuits are cascaded through the winding coil, an input end of the winding coil of a first circuit is connected to an ac voltage input end, an output end of the winding coil of each first circuit is connected to one end of the switch module, and another end of the switch module is connected to an ac voltage output end.
The technical scheme of the second aspect of the invention has at least one of the following advantages or beneficial effects: the first circuit comprises switch modules, each switch module is connected with at least one winding coil in the primary side in series, two adjacent first circuits are cascaded through the winding coils, the input end of the winding coil of the first circuit is connected with an alternating-current voltage input end, the output end of the winding coil of each first circuit is connected with one end of each switch module, the other end of each switch module is connected with an alternating-current voltage output end, the number of the coils on the primary side of the wireless charging magnetic core transformer is changed through the control switch modules, so that the coil ratio of the primary side of the wireless charging magnetic core transformer to the secondary side of the wireless charging magnetic core transformer is adjusted, and the flexibility of the wireless charging magnetic core transformer is improved.
Further, the switch module comprises a relay, the relay comprises a movable contact, a first fixed contact and a second fixed contact, the movable contact is connected with the alternating current output end, the first fixed contact is a normally closed contact, the second fixed contact is a normally open contact, and the second fixed contact is connected with the output end of the winding coil.
Further, the relay still includes the relay coil, switch module still includes triode and control signal end, the triode includes first end, second end and control end, the one end and the power of relay coil are connected, the other end of relay coil with the first end of triode is connected, the ground wire is connected to the second end of triode, the control end of triode with the control signal end is connected in order to receive level signal.
Further, still include first resistance, second resistance and diode, the diode with relay coil parallel connection, the negative pole and the power of diode are connected, the negative pole of diode with the one end of second resistance is connected, the other end of second resistance with the first end of triode is connected, the one end of first resistance with the control end of triode is connected, the other end of first resistance with the control signal end is connected.
In a third aspect, an embodiment of the present invention provides a wireless charging magnetic core transformer device, including the wireless charging magnetic core transformer, a motor, and a lead screw according to the technical solution of the first aspect; the motor and the lead screw are mutually matched to adjust the distance between the first magnetic core and the second magnetic core.
The technical scheme of the third aspect of the invention has at least one of the following advantages or beneficial effects: cooperate through motor and lead screw and adjust the interval between first magnetic core and the second magnetic core to change the inductance value of wireless charging magnetic core transformer, and then change the voltage that wireless charging magnetic core transformer once inclines, further improved the flexibility ratio of wireless charging magnetic core transformer.
Drawings
Fig. 1 is a schematic structural diagram of a circuit board according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the top-level circuitry of FIG. 1;
FIG. 3 is a schematic diagram of the structure of the underlying circuit of FIG. 1;
fig. 4 is a schematic structural diagram of a wireless charging magnetic core transformer according to an embodiment of the present invention;
FIG. 5 is a control circuit diagram of a wireless charging core transformer according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a wireless charging magnetic core transformer device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
In the description of the present invention, a plurality means two or more. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
A transformer is a device that changes voltage using the principle of electromagnetic induction, and the main components are a primary coil, a secondary coil, and a magnetic core. Among the correlation technique, the transformer mainly forms through setting up the coil around the magnetic core, and coil quantity also can correspondingly increase when the induced voltage that needs is great, generates heat when having the electric current to pass through in the coil and can increase the power loss of transformer, and long-time work can have the potential safety hazard. In addition, the primary coil and the secondary coil in the existing transformer are fixed on the magnetic core, and the flexible adjustment degree is not strong.
To this end, the embodiment of the invention provides a wireless charging magnetic core transformer, a control circuit and equipment. The circuit board comprises a top layer circuit, a bottom layer circuit and a central through hole, the top layer circuit and the bottom layer circuit are connected through the through hole on the circuit board to form a coil winding, a first magnetic core penetrates through the central through holes of the first number of circuit boards to form a primary side of the wireless charging magnetic core transformer, a second magnetic core penetrates through the central through holes of the second number of circuit boards to form a secondary side of the wireless charging magnetic core transformer, and copper wires are arranged on the top layer circuit and the bottom layer circuit to replace the traditional coil winding, so that the power loss of the wireless charging magnetic core transformer can be reduced; and connecting the second openings of the other circuit board through the first openings on the circuit boards to form a cascade of a plurality of circuit boards so as to adjust the coil ratio of the wireless charging magnetic core transformer. In addition, a first distance is formed between the primary side of the wireless charging magnetic core transformer and the secondary side of the wireless charging magnetic core transformer; the inductance value of the wireless charging magnetic core transformer can be flexibly adjusted by adjusting the first distance, and the flexibility of the wireless charging magnetic core transformer is improved.
Referring to fig. 1 to 3, the circuit board 100 includes a top circuit 110, a bottom circuit 120, a central through hole 130, a via hole 140, a first opening 150 and a second opening 160, the top circuit 110 is formed by winding a copper wire from outside to inside in a counterclockwise direction with the central through hole 130 as a center, the bottom circuit 120 is formed by winding a copper wire from outside to inside in a clockwise direction with the central through hole 130 as a center, the circuit board 100 is further provided with the via hole 140, and the top circuit 110 and the bottom circuit 120 are connected through the via hole 140 on the circuit board 100 to form a coil winding.
The power loss of the wireless charging core transformer 1000 can be reduced by providing the circuit board 100 with the top layer circuit 110 and the bottom layer circuit 120 formed by copper wire wound central through hole 130, and connecting the top layer circuit 110 and the bottom layer circuit 120 through the via hole 140 on the circuit board 100 to form a coil winding instead of a conventional coil winding, wherein the second opening 160 of one circuit board 100 is connected with the first opening 150 of another circuit board 100 to form a cascade circuit board so as to change the number of winding coils.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a wireless charging magnetic core transformer 1000 according to an embodiment of the present invention; including first magnetic core 200 and second magnetic core 300, first magnetic core 200 and second magnetic core 300 are the magnetic core of E. The first and second cores 200 and 300 are each made of a ferrite material, and the operating frequencies of the first and second cores 200 and 300 are 18kHz to 1MHz. The first core 200 passes through the central via 130 of the first number of circuit boards 100 to form a wireless charging core transformer primary side 500, and the second core 300 passes through the central via 130 of the second number of circuit boards 100 to form a wireless charging core transformer secondary side 600. The wireless charging core transformer primary side 500 is separated from the wireless charging core transformer secondary side 600 by a first distance.
The first magnetic core 200 penetrates through the central through holes 130 of the first number of circuit boards 100 to form a wireless charging magnetic core transformer primary side 500, and the second magnetic core 300 penetrates through the central through holes 130 of the second number of circuit boards 100 to form a wireless charging magnetic core transformer secondary side 600 to replace the traditional coil winding, so that the power loss of the wireless charging magnetic core transformer 1000 can be reduced; the coil ratios of the wireless charging core transformer primary side 500 and the wireless charging core transformer secondary side 600 are adjusted by adjusting the first number of circuit boards 100 and the second number of circuit boards 100. In addition, by adjusting the first distance between the wireless charging core transformer primary side 500 and the wireless charging core transformer secondary side 600, the inductance value of the wireless charging core transformer 1000 can be flexibly adjusted, and the flexibility of the wireless charging core transformer 1000 is improved.
It should be noted that the first distance may be adjusted according to a required coil ratio between the wireless charging core transformer primary side 500 and the wireless charging core transformer secondary side 600, and the distance of the first distance is not limited in the embodiment of the present invention.
Referring to fig. 5, fig. 5 is a control circuit diagram of a wireless charging magnetic core transformer according to an embodiment of the present invention; the wireless charging magnetic core transformer 2000 comprises a wireless charging magnetic core transformer 1000 and more than two first circuits 2000 which are connected in a cascade mode, each first circuit 2000 comprises a switch module 2100, each switch module 2100 is connected with at least one winding coil 2200 in a primary side 500 of the wireless charging magnetic core transformer in series, every two adjacent first circuits 2000 are connected in the cascade mode through the winding coil 2200, the input end of the winding coil 2200 of the first circuit 2000 is connected with an alternating voltage input end, the output end of the winding coil 2200 of each first circuit 2000 is connected with one end of the switch module 2100, and the other end of the switch module 2100 is connected with an alternating voltage output end. The coil ratio of the wireless charging core transformer primary side 500 and the wireless charging core transformer secondary side 600 is adjusted by changing the number of the coils of the wireless charging core transformer primary side 500 through the control switch module 2100, so that the flexibility of the wireless charging core transformer 1000 is improved. The relay comprises a movable contact, a first fixed contact and a second fixed contact, the movable contact is connected with the alternating current output end, the first fixed contact is a normally closed contact, the second fixed contact is a normally open contact, and the second fixed contact is connected with the output end of the winding coil. Switch module 2100 includes relay, triode, control signal end, first resistance, second resistance and diode, and wherein, the relay still includes the relay coil, and the triode includes first end, second end and control end, and the one end and the power of relay coil are connected, and the other end of relay coil and the first end of triode are connected, and the ground wire is connected to the second end of triode, and the control end and the control signal end of triode are connected in order to receive level signal. The diode is connected with the relay coil in parallel, the negative pole of the diode is connected with the power supply, the negative pole of the diode is connected with one end of the second resistor, the other end of the second resistor is connected with the first end of the triode, one end of the first resistor is connected with the control end of the triode, and the other end of the first resistor is connected with the control signal end. The on-off of the coil of the relay is controlled by changing the received level signal of the control signal end, when the control signal end receives a high level, the triode is in a conducting state, the static contact of the relay is connected with the second movable contact, and the cascade circuit is conducted.
It should be noted that, in the embodiment of the present invention, the diode is a schottky diode, the schottky diode has a fast switching efficiency and a short reverse recovery time, and blocks a reverse voltage through schottky, and the embodiment of the present invention does not limit the type of the diode.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a wireless charging magnetic core transformer device 3000 according to an embodiment of the present invention; the wireless charging magnetic core transformer 1000, the motor 3100 and the lead screw 3200 are included; the motor 3100 and the lead screw 3200 are fitted to each other to adjust the interval between the first magnetic core 200 and the second magnetic core 300. The gap between the first magnetic core 200 and the second magnetic core 300 is adjusted by matching the motor 3100 and the lead screw 3200, so that the inductance value of the wireless charging magnetic core transformer 1000 can be changed, the voltage of the primary side 500 of the wireless charging magnetic core transformer can be changed, and the flexibility of the wireless charging magnetic core transformer 1000 is further improved.
The embodiment of the invention provides a wireless charging magnetic core transformer 1000, a control circuit 2000 and equipment 3000. The circuit board 100 comprises a top circuit 110, a bottom circuit 120 and a central through hole 130, the top circuit 110 and the bottom circuit 120 are connected through a through hole 140 on the circuit board 100 to form a coil winding, the first magnetic core 200 penetrates through the central through holes 130 of the first number of circuit boards 100 to form a wireless charging magnetic core transformer primary side 500, the second magnetic core 300 penetrates through the central through hole 130 of the second number of circuit boards 100 to form a wireless charging magnetic core transformer secondary side 600, and the power loss of the wireless charging magnetic core transformer 1000 can be reduced by arranging copper wires on the top circuit 110 and the bottom circuit 120 to replace the traditional coil winding; the second opening 150 of another circuit board 100 is connected through the first opening 160 on the circuit board 100 to form a cascade of the plurality of circuit boards 100 to adjust the coil ratio of the wireless charging core transformer 1000. In addition, the wireless charging core transformer primary side 500 and the wireless charging core transformer secondary side 600 are separated by a first distance; the inductance value of the wireless charging magnetic core transformer 1000 can be flexibly adjusted by adjusting the first distance, and the flexibility of the wireless charging magnetic core transformer 1000 is improved.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and the scope of the embodiments of the present invention is not limited thereby. Any modifications, equivalents and improvements that may occur to those skilled in the art without departing from the scope and spirit of the embodiments of the present invention are intended to be within the scope of the claims of the embodiments of the present invention.
Claims (10)
1. A wireless charging core transformer, comprising:
the circuit board comprises a top layer circuit, a bottom layer circuit and a central through hole, wherein the top layer circuit is formed by winding a copper wire from outside to inside in a counterclockwise direction by taking the central through hole as a center, the bottom layer circuit is formed by winding a copper wire from outside to inside in a clockwise direction by taking the central through hole as a center, and the top layer circuit and the bottom layer circuit are connected through a through hole in the circuit board to form a coil winding;
and the magnetic cores comprise a first magnetic core and a second magnetic core, the first magnetic core penetrates through the central through holes of the circuit boards in the first quantity to serve as the primary side of the wireless charging magnetic core transformer, and the second magnetic core penetrates through the central through holes of the circuit boards in the second quantity to serve as the secondary side of the wireless charging magnetic core transformer.
2. The wireless charging core transformer according to claim 1, wherein the circuit boards are further provided with a first opening and a second opening, wherein the second opening of one circuit board is adapted to be connected to the first opening of another circuit board to form a cascade.
3. The wireless rechargeable core transformer of claim 1, wherein the wireless rechargeable core transformer primary side and the wireless rechargeable core transformer secondary side are separated by a first distance.
4. The wireless charging core transformer of claim 1, wherein the first core and the second core are each comprised of a ferrite material, and the operating frequency of the first core and the second core is 18kHz to 1MHz.
5. The wireless charging core transformer of claim 4, wherein the first and second magnetic cores are each E-shaped magnetic cores.
6. A control circuit of a wireless charging magnetic core transformer, comprising the wireless charging magnetic core transformer of any one of claims 1 to 5 and more than two cascade-connected first circuits, wherein the first circuits comprise switch modules, each switch module is connected in series with at least one winding coil in the primary side of the wireless charging magnetic core transformer, two adjacent first circuits are cascaded through the winding coil, the input end of the winding coil of the first circuit is connected with an AC voltage input end, the output end of the winding coil of each first circuit is connected with one end of the switch module, and the other end of the switch module is connected with an AC voltage output end.
7. The wireless charging magnetic core transformer control circuit of claim 6, wherein the switch module comprises a relay, the relay comprising a movable contact, a first stationary contact and a second stationary contact, the movable contact being connected to the alternating current output, the first stationary contact being a normally closed contact, the second stationary contact being a normally open contact, the second stationary contact being connected to the output of the winding coil.
8. The wireless charging magnetic core transformer control circuit according to claim 7, wherein the relay comprises a relay coil, the switch module further comprises a transistor and a control signal terminal, the transistor comprises a first terminal, a second terminal and a control terminal, one terminal of the relay coil is connected to a power supply, the other terminal of the relay coil is connected to the first terminal of the transistor, the second terminal of the transistor is connected to a ground, and the control terminal of the transistor is connected to the control signal terminal to receive a level signal.
9. The wireless charging magnetic core transformer control circuit according to claim 8, further comprising a first resistor, a second resistor and a diode, wherein the diode is connected in parallel with the relay coil, a cathode of the diode is connected to a power supply, a cathode of the diode is connected to one end of the second resistor, another end of the second resistor is connected to the first end of the transistor, one end of the first resistor is connected to the control end of the transistor, and another end of the first resistor is connected to the control signal end.
10. A wireless rechargeable magnetic core transformer device comprising the wireless rechargeable magnetic core transformer of any one of claims 1 to 5, an electric motor and a lead screw; the motor and the screw rod are matched with each other to adjust the distance between the primary side of the wireless charging magnetic core transformer and the secondary side of the wireless charging magnetic core transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211633812.0A CN115985643A (en) | 2022-12-19 | 2022-12-19 | Wireless charging magnetic core transformer, control circuit and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211633812.0A CN115985643A (en) | 2022-12-19 | 2022-12-19 | Wireless charging magnetic core transformer, control circuit and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115985643A true CN115985643A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211633812.0A Pending CN115985643A (en) | 2022-12-19 | 2022-12-19 | Wireless charging magnetic core transformer, control circuit and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115985643A (en) |
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2022
- 2022-12-19 CN CN202211633812.0A patent/CN115985643A/en active Pending
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Application publication date: 20230418 |