PCB and motor
By embedding soft magnetic materials in the substrate of the PCB circuit board, the problem of magnetic field loss caused by the non-magnetic conductivity of the substrate is solved, achieving higher power output and wider applications.
Patent Information
- Application Number
- CN202422124601.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The substrate material of existing PCB circuit boards is not magnetically conductive, resulting in large magnetic field losses when the wires are energized, making it difficult to meet the demand for higher power output.
Soft magnetic materials are embedded in the substrate of the PCB circuit board to improve the magnetic conductivity of the substrate and reduce the magnetic field loss when the wire is energized.
Without increasing the volume of the circuit board or stator, the power output is improved and the application scenarios are expanded.
Smart Images
Figure CN223402627U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit boards, in particular to a PCB circuit board and a motor. Background Art
[0002] The disc motor with printed circuit board as stator is gradually replacing the motor with traditional stator because of its compact structure, small size and high speed.
[0003] Nowadays, in order to obtain higher power and meet greater demand in usage scenarios, several technical methods are commonly used. One is to increase the number of turns of the winding unit on the circuit board, the second is to thicken the wire of the winding unit on the circuit board, and the third is to increase the number of layers of the circuit board. The core idea of these methods is to enhance the magnetic field generated by the wire when it is energized to obtain greater driving force for the rotor. However, the disadvantage of these methods is that they often require the design of a larger circuit board or a thicker stator.
[0004] However, in our research, we found that because the substrate material of the circuit board itself is not magnetically conductive, the magnetic field generated when the wire is energized suffers significant losses. Utility Model Content
[0005] To address the deficiencies in the prior art, the present invention provides a PCB circuit board and a motor. The PCB circuit board and motor embed soft magnetic material in the substrate of the circuit board, so that the substrate of the circuit board has a certain magnetic conductivity, thereby greatly reducing the loss of the magnetic field generated when the wire is energized. This allows for higher power output while maintaining the same wire size and number of circuit board layers in the stator.
[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0007] On the one hand, the utility model provides a PCB circuit board, including a substrate, a winding unit is provided on the substrate, and soft magnetic material is embedded in the substrate. The area on the substrate where the soft magnetic material is embedded is defined as a magnetic conductive area.
[0008] The PCB circuit board of the utility model embeds soft magnetic material in the substrate, so that the substrate itself has a certain magnetic conductivity effect, thereby greatly reducing the magnetic field loss generated when the wires on the substrate are energized. The stronger magnetic field can output higher power when driving the rotor. Compared with other methods, the volume of the circuit board of the utility model remains unchanged, and the volume of the motor remains unchanged, so higher power can be obtained and the application scenarios are wider.
[0009] In a further technical solution, the winding unit includes an inner winding located in the inner circle, an outer winding located in the outer circle, and a wire located between the inner winding and the outer winding. The wire connects the inner winding and the outer winding to form a coil, and the magnetic conductive area is the area where the wire is located.
[0010] There are usually multiple wires, and the wires are evenly distributed. The wires are the current-carrying conductors in the winding unit that generate the magnetic field that drives the rotor. Therefore, setting the magnetic conductive area in the area where the wires are located can specifically reduce the magnetic loss of the magnetic field generated by the power supply of the wires.
[0011] In a further technical solution, a wire groove is provided on the substrate, the wire groove is filled with a conductive medium as a wire, and the soft magnetic material is embedded in the substrate outside the wire groove.
[0012] In some substrate designs, the conductors are slotted, which can increase the conductor passing area while reducing the area occupied by the conductors on the substrate, increase the power, and increase the magnetic field generated by the conductors. In this structure, the soft magnetic material is embedded in the substrate outside the conductor slot, which can reduce the processing difficulty.
[0013] In a further technical solution, the wire grooves penetrate the thickness direction of the substrate, and are arranged in a circular array on the substrate with the center of the substrate as the center of the circle. The magnetic conductive area is the substrate area between any two wire grooves.
[0014] In some substrate designs, the wire grooves are through-holes, and the wire grooves of multi-layer substrates are connected vertically. The characteristic of this design is that there are multiple wire grooves arranged in a circle, so the magnetic conductive area is set in the substrate between the wire grooves, and the magnetization effect is good and uniform.
[0015] In a further technical solution, the conductive wire is a conductive medium arranged on the surface of the substrate, the magnetic conductive area is the substrate area where the conductive wire is arranged, and the soft magnetic material is embedded in the substrate below the conductive wire.
[0016] In some substrate designs, the conductors are conductive media printed, sprayed, or attached to the substrate surface. Therefore, the substrate thickness in the conductor area is sufficient and uniform. In this case, soft magnetic material can be embedded in the entire substrate below the conductor, further reducing the processing difficulty, maximizing the magnetic conductivity of the substrate, and achieving higher power output.
[0017] In a further technical solution, the substrate is provided with a magnetic conductive groove in the magnetic conductive area, the magnetic conductive groove is filled with soft magnetic material, and the opening of the magnetic conductive groove is closed.
[0018] Grooves are made on the substrate, filled with soft magnetic material and then sealed. The thickness and surface of the substrate itself are no different from those of traditional substrates.
[0019] In a further technical solution, the magnetic conductive groove is a hole-shaped, strip-shaped or planar groove.
[0020] The shapes of the magnetic conductive grooves can be varied to maximize the use of the area of the magnetic conductive region on the substrate.
[0021] On the other hand, the present invention further provides a motor, wherein the stator of the motor is a PCB circuit board as described in any one of the above technical solutions.
[0022] The PCB circuit board and motor of the present invention embed soft magnetic material in the substrate of the circuit board, so that the substrate of the circuit board has a certain magnetic conductivity, thereby greatly reducing the loss of the magnetic field generated when the wire is energized. Higher power output can be achieved while keeping the wire size in the stator and the number of circuit board layers unchanged.
[0023] The beneficial effects are:
[0024] 1. The PCB circuit board and motor of the present invention embed soft magnetic material in the substrate of the circuit board, so that the substrate of the circuit board has a certain magnetic conductivity, thereby greatly reducing the loss of the magnetic field generated when the wire is energized. While the size of the wire in the stator and the number of circuit board layers remain unchanged, higher power output can be achieved.
[0025] 2. There are usually multiple wires, and the wires are evenly distributed. The wires are the current-carrying conductors that generate the magnetic field that drives the rotor in the winding unit. Therefore, setting the magnetic conductive area in the area where the wires are located can specifically reduce the magnetic loss of the magnetic field generated by the power supply of the wires.
[0026] 3. In some substrate designs, the conductors are slotted, which can increase the conductor passing area while reducing the area occupied by the conductors on the substrate, increase the power, and increase the magnetic field generated by the conductors. In this structure, the soft magnetic material is embedded in the substrate outside the conductor slot, which can reduce the processing difficulty.
[0027] 4. In some substrate designs, the wire grooves are through-holes, and the wire grooves of multi-layer substrates are through-holes. The characteristic of this design is that there are multiple wire grooves arranged around, so the magnetic conductive area is set in the substrate between the wire grooves, and the magnetization effect is good and uniform.
[0028] 5. In some substrate designs, the conductors are conductive media printed, sprayed or attached to the substrate surface. Therefore, the substrate thickness in the conductor area is sufficient and uniform. In this case, soft magnetic material can be embedded in the substrate below the conductor to further reduce the processing difficulty, maximize the magnetic conductivity of the substrate, and obtain higher power output.
[0029] 6. Slots are made on the substrate, filled with soft magnetic material and then sealed. The thickness and surface of the substrate itself are no different from those of traditional substrates.
[0030] 7. The shape of the magnetic groove can be diversified to maximize the use of the area of the magnetic conductive area on the substrate. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 This is a schematic diagram of the arrangement of the winding unit of the PCB circuit board in one embodiment of the present utility model;
[0032] Figure 2 This is a schematic diagram of the magnetic conductive area of a PCB circuit board in one embodiment of the present utility model;
[0033] Figure 3 This is a schematic diagram of the arrangement of a winding unit of a PCB circuit board according to another embodiment of the present invention;
[0034] Figure 4 This is a schematic diagram of the magnetic conductive area of a PCB circuit board according to another embodiment of the present invention.
[0035] 10. Base plate; 11. Winding unit; 111. Conducting wire; 112. Inner and outer windings; 20. Magnetic guide groove. DETAILED DESCRIPTION
[0036] The present invention will be further described below with reference to the accompanying drawings:
[0037] Example:
[0038] A PCB circuit board, such as Figure 1 and Figure 2 As shown, it includes a substrate 10, a winding unit 11 is provided on the substrate 10, and a soft magnetic material is embedded in the substrate 10. The area on the substrate 10 where the soft magnetic material is embedded is defined as a magnetic conductive area. Figure 1 In the figure, the surface of the substrate 10 covered by the winding unit 11 is indicated by hatching.
[0039] The PCB circuit board of the present invention embeds soft magnetic material in the substrate 10, so that the substrate 10 itself has a certain magnetic conductivity effect, thereby greatly reducing the magnetic field loss generated when the wires on the substrate 10 are energized. The stronger magnetic field can output higher power when driving the rotor. Compared with other methods, the volume of the circuit board of the present invention remains unchanged, and the volume of the motor remains unchanged, so higher power can be obtained and the application scenarios are wider.
[0040] The PCB circuit board and motor of the present invention embed soft magnetic material in the substrate 10 of the circuit board, so that the substrate 10 of the circuit board has a certain magnetic conductivity, thereby greatly reducing the loss of the magnetic field generated when the wire is energized. Higher power output can be achieved while keeping the wire size and the number of circuit board layers in the stator unchanged.
[0041] In one embodiment, if Figure 1 and Figure 2As shown, the winding unit 11 includes an inner winding located in the inner circle, an outer winding located in the outer circle, and a wire 111 located between the inner winding and the outer winding. In this embodiment, the inner winding and the outer winding are collectively referred to as inner and outer windings 112. The wire 111 connects the inner winding and the outer winding to form a coil, and the magnetic conductive area is the area where the wire 111 is located.
[0042] There are usually multiple wires 111, and the multiple wires 111 are evenly distributed. The wires 111 are the current-carrying conductors that generate the magnetic field that drives the rotor in the winding unit 11. Therefore, setting the magnetic conductive area in the area where the wires 111 are located can specifically reduce the magnetic loss of the magnetic field generated by the power supply of the wires 111.
[0043] In one embodiment, Figure 1 and Figure 2 As shown, a conductor groove is provided on the substrate 10 , the conductor groove is filled with a conductive medium as a conductor 111 , and a soft magnetic material is embedded in the substrate 10 outside the conductor groove.
[0044] In the design of some substrates 10, the wire 111 is grooved, which can increase the wire passing area of the wire 111 while reducing the area occupied by the wire 111 on the substrate 10, increase the power, and increase the magnetic field generated by the wire 111. Under this structure, the soft magnetic material is embedded in the substrate 10 outside the wire groove, which can reduce the processing difficulty.
[0045] In one embodiment, Figure 1-Figure 2 As shown, the wire grooves penetrate the thickness direction of the substrate 10, and the wire grooves are arranged in a circular array on the substrate 10 with the center of the substrate 10 as the center of the circle. The magnetic conductive area is the area of the substrate 10 between any two wire grooves.
[0046] In the design of some substrates 10, the wire grooves are through, and the wire grooves of the multi-layer substrate 10 are through from top to bottom. The characteristic of this design is that there are multiple wire grooves arranged around, so the magnetic conductive area is set in the substrate 10 between the wire grooves, and the magnetization effect is good and uniform.
[0047] In another embodiment, Figure 3 and Figure 4 As shown, the wire 111 is a conductive medium arranged on the surface of the substrate 10 , the magnetic conductive area is the area of the substrate 10 where the wire 111 is arranged, and the soft magnetic material is embedded in the substrate 10 below the wire 111 .
[0048] In some substrate 10 designs, the conductor 111 is a conductive medium printed, sprayed or attached to the surface of the substrate 10. Therefore, the thickness of the substrate 10 in the conductor 111 area is sufficient and uniform. In this case, soft magnetic material can be embedded in the entire substrate 10 below the conductor 111, further reducing the processing difficulty, maximizing the magnetic conductivity of the substrate 10, and obtaining higher power output.
[0049] In this embodiment, the magnetic conductive area is the area framed by a bold dotted line.
[0050] In this embodiment, if Figure 4 As shown, the magnetic conductive area is composed of four sector-shaped areas.
[0051] In another embodiment, the difference between this embodiment and the previous embodiment is that the magnetic conductive area is an annular area covering the entire conductor 111 area, that is, the four fan-shaped magnetic conductive areas in the previous embodiment are connected end to end to form an annular magnetic conductive area to fill an entire soft magnetic body.
[0052] In this embodiment, the processing method is simpler. The substrate 10 is designed to be three layers, which are a substrate bottom layer, a soft magnetic layer and a substrate top layer from bottom to top, and the three layers can be stacked.
[0053] In another embodiment, Figure 2 As shown, the substrate 10 is provided with a magnetic conductive groove 20 in the magnetic conductive area. The magnetic conductive groove 20 is filled with soft magnetic material, and the opening of the magnetic conductive groove 20 is closed.
[0054] Grooves are formed on the substrate 10 , filled with soft magnetic material, and then sealed. The thickness and surface of the substrate 10 itself are the same as those of a conventional substrate 10 , and do not affect the arrangement of the winding unit 11 thereon.
[0055] In another embodiment, Figure 2 As shown, the magnetic conductive groove 20 is a hole-shaped, strip-shaped or planar groove.
[0056] The shape of the magnetic conductive groove 20 can be varied to maximize the utilization of the area of the magnetic conductive region on the substrate 10 .
[0057] In another embodiment, a motor is provided, wherein the stator of the motor is a PCB circuit board as in any of the above embodiments.
[0058] The PCB circuit board and motor of the present invention embed soft magnetic material in the substrate 10 of the circuit board, so that the substrate 10 of the circuit board has a certain magnetic conductivity, thereby greatly reducing the loss of the magnetic field generated when the wire is energized. Higher power output can be achieved while keeping the wire size and the number of circuit board layers in the stator unchanged.
[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.
Claims
1. A PCB circuit board, comprising a substrate, on which a winding unit is provided, characterized in that: A soft magnetic material is embedded in the substrate, and a region on the substrate where the soft magnetic material is embedded is defined as a magnetic conductive region; The winding unit includes an inner winding located in the inner circle, an outer winding located in the outer circle, and a wire located between the inner winding and the outer winding. The wire connects the inner winding and the outer winding to form a coil, and the magnetic conductive area is the area where the wire is located.
2. The PCB circuit board according to claim 1, characterized in that: A conductor groove is provided on the substrate, the conductor groove is filled with a conductive medium as a conductor, and the soft magnetic material is embedded in the substrate outside the conductor groove.
3. The PCB circuit board according to claim 2, characterized in that: The conductive grooves penetrate the thickness direction of the substrate. The conductive grooves are arranged in a circular array on the substrate with the center of the substrate as the center of the circle. The magnetic conductive area is the substrate area between any two conductive grooves.
4. The PCB circuit board according to claim 1, characterized in that: The conductive wire is a conductive medium arranged on the surface of the substrate, the magnetic conductive area is the substrate area where the conductive wire is arranged, and the soft magnetic material is embedded in the substrate below the conductive wire.
5. The PCB circuit board according to claim 1, characterized in that: The substrate is provided with a magnetic conductive groove in the magnetic conductive area. The magnetic conductive groove is filled with soft magnetic material, and the opening of the magnetic conductive groove is closed.
6. The PCB circuit board according to claim 5, characterized in that: The magnetic conductive groove is a hole-shaped, strip-shaped or plane-shaped groove.
7. A motor, characterized in that: The stator of the motor is a PCB circuit board as described in any one of claims 1 to 6.