Stator cover, motor and electrical equipment

Abstract

This invention provides a stator cover plate, a motor, and electrical equipment, including: a ring-shaped substrate and a PCB circuit board, wherein the size of the PCB circuit board is smaller than the size of the ring-shaped substrate; the PCB circuit board is mounted on the ring-shaped substrate and generates a motor drive signal based on a motor sampling signal; the ring-shaped substrate has end wire holes that penetrate the ring-shaped substrate. This invention reduces the cost of the PCB circuit board, thereby reducing the cost of the motor and improving its competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a stator cover plate, a motor, and electrical equipment. Background Technology

[0002] The use of brushless DC motors in home appliances is becoming increasingly widespread, and the cost of the motor (including the control board) is a decisive factor in product competitiveness. For example... Figure 1 As shown, the cost of a DC brushless motor is divided into two parts: the cost of the motor body 10 (silicon steel sheet, coil, magnetic material cost, and processing cost) and the cost of the control circuit board 11; the cost of the control circuit board 11 is further divided into the cost of the printed circuit board 111 and the cost of the components 112.

[0003] like Figure 2 Traditionally, the printed circuit board (PCB) 111 is set as a ring structure to serve as a cover for the motor stator, acting as both a covering material and a carrier for the control circuit, chips, and components 112. As a result, the cost of the PCB remains high, making it impossible to effectively control the cost of the motor.

[0004] Therefore, how to reduce the cost of printed circuit boards, and consequently the cost of motors, has become one of the problems that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a stator cover plate, a motor and electrical equipment to solve the problem of high motor cost in the prior art.

[0007] To achieve the above and other related objectives, this utility model provides a stator cover plate, which includes at least:

[0008] A ring-shaped substrate and a PCB circuit board, wherein the size of the PCB circuit board is smaller than the size of the ring-shaped substrate;

[0009] The PCB circuit board is mounted on the annular substrate and generates a motor drive signal based on the motor sampling signal.

[0010] The annular substrate is provided with an end wire hole that penetrates the annular substrate.

[0011] Optionally, the inner diameter of the annular substrate is 10mm to 50mm, and the outer diameter of the annular substrate is 40mm to 75mm.

[0012] Optionally, the thickness of the annular substrate is set to 0.5 mm to 2 mm.

[0013] Optionally, the size of the PCB circuit board is no greater than 200mm. 2 .

[0014] Optionally, the annular substrate is further provided with a groove, and the PCB board is disposed in the groove; the depth of the groove is less than the thickness of the annular substrate.

[0015] Optionally, the solder joints of the motor drive signal are located at the first end of the PCB circuit board, and the terminal hole is located on the outside of the first end of the PCB circuit board.

[0016] Alternatively, the annular substrate may be a plastic plate or a metal plate.

[0017] Alternatively, the plastic sheet may be an ABS sheet, PP sheet, PS sheet, PC sheet, or PVC sheet.

[0018] To achieve the above and other related objectives, this utility model also provides an electric motor, which includes at least: a stator, a rotor, a shaft, and the stator cover plate described above;

[0019] The stator and the rotor are fitted together; one end of the rotating shaft is connected to the rotor; the stator cover is fitted onto the rotating shaft and covers the stator and the rotor; the side of the stator cover with the PCB circuit board faces outward, and the transmission line of the motor drive signal passes through the end wire hole on the stator cover and is electrically connected to the stator.

[0020] To achieve the above and other related objectives, this utility model also provides an electrical device, which includes at least the aforementioned motor.

[0021] As described above, the stator cover plate, motor, and electrical equipment of this utility model have the following beneficial effects:

[0022] The stator cover plate, motor and electrical equipment of this utility model adopt an annular substrate as the stator cover plate, and the PCB circuit board is set on the annular substrate. At the same time, the area of ​​the PCB circuit board is reduced, thereby reducing the cost of the PCB circuit board, and thus reducing the cost of the motor and improving the competitiveness of the motor. Attached Figure Description

[0023] Figure 1 The diagram shown is a structural schematic of an electric motor in the prior art.

[0024] Figure 2The diagram shows a schematic of a control circuit board in the prior art.

[0025] Figure 3 The diagram shown is a structural schematic of the stator cover plate of this utility model.

[0026] Figure 4 The diagram shown is an exploded view of a motor structure according to this utility model.

[0027] Figure 5 This is an exploded view of another motor structure according to the present invention.

[0028] Component designation explanation

[0029] 10. Motor body

[0030] 11 Control Circuit Board

[0031] 111 Printed Circuit Board

[0032] 112 Control circuits, chips and components

[0033] 2. Stator cover plate

[0034] 21 Ring substrate

[0035] 211 Terminal Hole

[0036] 22 PCB circuit boards

[0037] 221 Solder joint

[0038] 222 Power Supply Connector

[0039] 3. Stator

[0040] 31. Outer shell

[0041] 32 windings

[0042] 4 rotors

[0043] 5-axis Detailed Implementation

[0044] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0045] Please see Figures 3-5It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] With the continuous advancement of integrated circuit (chip) technology, the size of control circuits, chips, and components is becoming smaller and smaller, resulting in very low PCB board area utilization. Therefore, this utility model reduces the PCB board area and improves the area utilization, while setting a ring substrate as a cover plate.

[0047] like Figure 3 As shown, this utility model provides a stator cover plate 2, which includes:

[0048] Annular substrate 21 and PCB circuit board 22.

[0049] like Figure 3 As shown, the annular substrate 21 serves as the cover plate of the stator and is configured as an annular structure; the annular substrate 21 is provided with end wire holes that penetrate the annular substrate 21 for lead wires.

[0050] Specifically, such as Figure 2 As shown, in this embodiment, the annular substrate 21 has a circular structure (as an example, the inner and outer contours of the ring are concentric circles). In actual use, any structure where the inner and outer sides are connected end to end to form a closed area can be used as the shape of the annular substrate 21 of this utility model. The inner and outer contours can be set as, but are not limited to, rectangles, triangles, or other irregular shapes, which will not be elaborated here. Figure 3 As shown, in this embodiment, the inner diameter of the annular substrate 21 is set to 10mm to 50mm, and the outer diameter is set to 40mm to 75mm; the specific values ​​can be set as needed, as long as the inner diameter is smaller than the outer diameter. In this embodiment, the thickness of the annular substrate 21 is set to 0.5mm to 2mm; in actual use, the thickness of the annular substrate 21 can be set as needed, and is not limited to this embodiment.

[0051] Specifically, in this embodiment, the annular substrate 21 is set as a plastic plate or a metal plate. Any material with a lower cost than a PCB board for the same area can be used as the annular substrate, which will not be elaborated here. As an example, when the annular substrate 21 is set as a plastic plate, the plastic plate is set as one of the following, but not limited to, ABS board (a terpolymer of acrylonitrile A, butadiene B, and styrene S monomers), PP board (polypropylene), PS board (polystyrene), PC board (polycarbonate), and PVC board (polyvinyl chloride).

[0052] like Figure 3 As shown, the PCB circuit board 22 is mounted on the annular substrate 21 and generates a motor drive signal based on the motor sampling signal.

[0053] Specifically, the PCB circuit board 22 is disposed on the surface of the annular substrate 21. The PCB circuit board 22 integrates chips and components to form a complete motor control circuit; it also includes solder joints and connectors for electrical connections. As an example, the chips include, but are not limited to, drive control chips; the components include, but are not limited to, sensors, sampling resistors, and external capacitors; these will not be elaborated upon here. In this embodiment, the motor drive signal is led out of the PCB circuit board 22 through solder joints 221, and the power supply is connected to the motor control circuit through power supply connectors 222.

[0054] Specifically, the size of the PCB circuit board 22 is smaller than the size of the annular substrate 21. For example, the size of the PCB circuit board 22 is no greater than 200 mm. 2 The actual dimensions are determined based on the specific number and size of the components and are not limited to this embodiment. The PCB circuit board 22 can be fixed to the annular substrate 21 by adhesive or screws; any method that can fix the PCB circuit board and the annular substrate is applicable to this invention. In this embodiment, the annular substrate 21 is also provided with a groove, the depth of which is less than the thickness of the annular substrate 21. This groove is used for positioning and setting the PCB board 22.

[0055] Specifically, in this embodiment, the motor drive signal is a three-phase signal; in actual use, the number of drive signals can be set according to the needs of the motor, including but not limited to single-phase, two-phase, or four-phase and above. The solder joint 221 of the motor drive signal is set at the first end of the PCB circuit board 22, and the terminal hole 211 is set on the outside of the first end of the PCB circuit board 22, so that the position of the solder joint 221 corresponds to that of the terminal hole 211. The motor lead wire led out from the solder joint 221 can pass through the terminal hole 211 with the shortest possible distance, thereby simplifying the wiring complexity, reducing the lead wire length, and reducing costs to a certain extent.

[0056] like Figure 4 and Figure 5 As shown, this utility model also provides an electric motor, which includes: a stator 3, a rotor 4, a rotating shaft 5, and the aforementioned stator cover plate 2.

[0057] Specifically, the stator 3 and the rotor 4 are fitted together, wherein the stator 3 remains relatively stationary, while the rotor 4 rotates during operation. For example... Figure 4 As shown, as an example, the stator 3 is sleeved on the outside of the rotor 4; in this example, the stator 3 includes a housing 31 and a winding 32, which are fixedly arranged relative to each other, and the winding has a ring structure; the rotor 4 is disposed inside the winding 32. Figure 5 As shown, as another example, the rotor 4 is mounted on the outside of the stator 3, which includes annular windings.

[0058] Specifically, such as Figure 4 and Figure 5 As shown, one end of the rotating shaft 5 is fixedly connected to the rotor 4, and the rotating shaft 5 rotates together with the rotor 4.

[0059] Specifically, such as Figure 4 and Figure 5 As shown, the stator cover plate 2 is sleeved on the rotating shaft 5, covering the stator 3 and rotor 4, and is fixed to the stator 3 and maintains a relatively stationary state; the side of the stator cover plate 2 with the PCB circuit board 22 faces outward. Figure 3 As shown, the transmission line of the motor drive signal passes through the terminal hole 211 on the stator cover plate 2 and is electrically connected to the stator 3 (winding) to generate an electric field that drives the rotor 4 to rotate.

[0060] The motor of this invention uses the stator cover plate 2 of this invention, which can reduce costs and improve the competitiveness of the motor. The motor can be a DC brushless motor or a stepper motor (including but not limited to claw-pole stepper motors), which will not be described in detail here.

[0061] This utility model also provides an electrical device, which includes at least the motor of this utility model. Other components are set based on actual functions and will not be described in detail here.

[0062] In summary, this utility model provides a stator cover plate, a motor, and electrical equipment, including: a ring-shaped substrate and a PCB circuit board, the size of which is smaller than that of the ring-shaped substrate; the PCB circuit board is mounted on the ring-shaped substrate and generates a motor drive signal based on a motor sampling signal; the ring-shaped substrate has end wire holes that penetrate the substrate. This utility model reduces the cost of the PCB circuit board, thereby reducing the cost of the motor and improving its competitiveness. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0063] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A stator cover plate characterized by, The stator cover plate includes at least: A ring-shaped substrate and a PCB circuit board, wherein the size of the PCB circuit board is smaller than the size of the ring-shaped substrate; The PCB circuit board is mounted on the annular substrate and generates a motor drive signal based on the motor sampling signal. The annular substrate is provided with an end wire hole that penetrates the annular substrate.

2. The stator cover plate of claim 1, wherein: The inner diameter of the annular substrate is 10mm to 50mm, and the outer diameter of the annular substrate is 40mm to 75mm.

3. The stator cover plate of claim 1, wherein: The thickness of the annular substrate is set to 0.5 mm to 2 mm.

4. The stator cover plate of claim 1, wherein: The size of the PCB circuit board is not greater than 200mm 2 .

5. The stator cover plate of claim 1, wherein: The annular substrate is further provided with grooves, and the PCB circuit board is disposed in the grooves; the depth of the grooves is less than the thickness of the annular substrate.

6. The stator cover plate of claim 1, wherein: The solder joints for the motor drive signal are located at the first end of the PCB circuit board, and the terminal hole is located on the outer side of the first end of the PCB circuit board.

7. A stator cover plate according to any one of claims 1-6, characterized in that: The annular substrate is a plastic plate or a metal plate.

8. The stator cover plate of claim 7, wherein: The plastic sheet is made of ABS, PP, PS, PC, or PVC.

9. An electric machine characterized by The motor includes at least: a stator, a rotor, a shaft, and a stator cover as described in any one of claims 1-8; The stator and the rotor are fitted together; one end of the rotating shaft is connected to the rotor; the stator cover is fitted onto the rotating shaft and covers the stator and the rotor; the side of the stator cover with the PCB circuit board faces outward, and the transmission line of the motor drive signal passes through the end wire hole on the stator cover and is electrically connected to the stator.

10. An electrical appliance characterized by The electrical equipment includes at least the motor as described in claim 9.

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