Integrated filter stator structure and motor thereof

Abstract

The utility model relates to an integrated filter stator structure and a motor thereof, the integrated filter stator structure comprises a stator core and stator coils, a plurality of stator slots are constructed on the stator core, and a plurality of groups of stator coils are inserted into the stator slots to be assembled with the stator core. A magnetic circuit dividing groove is axially arranged between the mounting seat and the stator core in a penetrating manner, a wire passing hole is axially formed in the mounting seat in a penetrating manner, insulation paper is inserted in the wire passing hole, a three-phase wiring terminal is arranged on the wire passing hole and on the inner side of the insulation paper in a penetrating manner, one end of the three-phase wiring terminal extends out of the wire passing hole and is connected with a three-phase wire outlet end of a stator coil, and the other end of the three-phase wiring terminal is connected with a magnetic circuit. And the other end extends out of the wire-passing hole and is connected with the outside. According to the scheme, the magnetic field generated after the stator iron core is electrified is directly filtered, electric appliance elements such as a capacitor, an inductor and a resistor do not need to be additionally used, and the installation size and cost of the motor can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to an integrated filter stator structure and a motor thereof. Background Art

[0002] Conventional stator outgoing wires have no filtering function, and shaft current and EMC problems are prominent.

[0003] If existing motors need to filter three phases, a magnetic ring module must be added to the output end for filtering. It may be placed at the motor end or the controller end. The filter module usually includes capacitors, inductors, resistors, etc. These electrical components increase the size and cost of the system.

[0004] A Chinese invention patent with publication number CN117294081A discloses a motor EMC filter, a motor and a car. The motor EMC filter includes a ring-shaped circuit board, a first device and a second device. The inner hole edge of the ring-shaped circuit board is provided with a ring-shaped grounding portion. The ring-shaped circuit board has a first area and two second areas. The first area is provided with two input terminals and at least two first mounting positions. Each first mounting position is parallel between the two input terminals, and the two input terminals correspond to the two second areas one by one. Each second area is provided with an output terminal, a second mounting position and an extended mounting position. The extended mounting position of each second area is provided between the grounding portion and the corresponding input terminal, and the second mounting position is provided between the output terminal and the corresponding input terminal. The first device is a TVS diode or a chip capacitor, and at least one first mounting position is provided with a first device. The second device is a chip bead or a chip differential mode inductor, and each second mounting position is provided with a second device.

[0005] The filter in the above solution is provided with a circuit board, a first device, a second device, etc., which increases the size and cost of the motor. Summary of the invention

[0006] In order to solve the above problems, the first purpose of the utility model is to provide an integrated filter stator structure to reduce the system EMC interference and shaft current influence, integrate the filter without destroying the original motor magnetic circuit and try not to increase the size and cost of the system; the second purpose of the utility model is to provide a motor having the above-mentioned integrated filter stator structure.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] An integrated filter stator structure comprises a stator core and a stator coil, wherein a plurality of stator slots are constructed on the stator core, and a plurality of groups of stator coils are inserted into the stator slots and assembled with the stator core, and the structure is characterized in that: a mounting seat is axially formed on the side wall of the stator core, a magnetic circuit dividing groove is axially penetrated between the mounting seat and the stator core, a wire passing hole is axially penetrated on the mounting seat, an insulating paper is inserted in the wire passing hole, a three-phase terminal is penetrated on the inner side of the insulating paper on the wire passing hole, one end of the three-phase terminal extends out of the wire passing hole to be connected with the three-phase outlet terminal of the stator coil, and the other end extends out of the wire passing hole to be connected with the outside.

[0009] In the above technical solution, a mounting seat is arranged on the side wall of the stator core, a wire passing hole is opened on the mounting seat, and a three-phase terminal is passed through the wire passing hole to form a common mode filter, and the three-phase terminal is connected to the three-phase terminal of the stator coil. This solution directly uses the magnetic field generated by the stator core after power is turned on for filtering, without the need for additional electrical components such as capacitors, inductors and resistors, and can effectively reduce the installation size and cost of the filter (motor).

[0010] In addition, a magnetic circuit dividing groove is provided between the mounting base and the stator core to prevent the magnetic field in the stator core from interfering with the common mode filter. The insulating paper provides insulation protection for the wire hole to prevent discharge and protect the motor.

[0011] Preferably, the two axial ends of the mounting seat are flush with the two axial ends of the stator core. In this technical solution, the two axial ends of the mounting seat are flush with the two axial ends of the stator core, which can maximize the use of the magnetic field in the wire hole for filtering, while making sure that the two axial sides of the mounting seat do not extend out of the stator core, and the axial installation size of the stator core will not be increased.

[0012] Preferably, the three-phase terminal comprises three connecting rods arranged at intervals, and the three connecting rods are respectively connected to the three-phase output terminals of the stator coil through connecting sections, and the connecting sections include a bending section formed toward the stator coil side and an arc section extending outward along the side end of the bending section, and the arc section is wound around the outside of the stator slot, and the inner ends of the three arc sections are respectively welded to the side ends of the three-phase output terminals of the stator coil through welding sections.

[0013] In the above technical solution, the connecting rod of the three-phase terminal is connected to the three-phase outlet terminal of the stator coil through the connecting section. Since the positions of the three-phase outlet terminals of the stator coil are different, the lengths of the three connecting sections are also different; the connecting section includes a bent section and an arc section, and both are close to the stator coil side, without increasing the radial assembly size of the stator core; at the same time, the arc section and the three-phase outlet terminal of the stator coil are welded and fixed through a plurality of welding sections, with high connection strength and good integrity, which can effectively maintain the stability of the connecting rod in the wire hole.

[0014] Preferably, the arc segment is a circular arc segment having the same curvature as the stator core. In this technical solution, the arc segment is a circular arc segment having the same curvature as the stator core, the welding segment can be adapted to the width of the three-phase output terminal of the stator coil, and then welded and fixed to the arc segment, so that the structural strength is stronger, and the arc segment in the middle can maintain an effective interval with the outer arc segment to avoid interference.

[0015] Preferably, the axial outer end face of the connecting section is flush with the end face of the stator coil. In this technical solution, the axial outer end face of the connecting section is flush with the end face of the stator coil, which does not increase the axial installation size of the stator core.

[0016] Preferably, the connecting rod, the bending section and the arc section are integrally formed. In this technical solution, the connecting rod, the bending section and the arc section are integrally formed, and the integrated structure strength of the three-phase terminal and the connecting section is high, thereby making the connection stability between the three-phase terminal and the three-phase output terminal of the stator coil good.

[0017] A motor comprises any one of the above-mentioned integrated filter stator structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an integrated filter stator structure.

[0019] Figure 2 Schematic diagram of the mounting arrangement.

[0020] Figure 3 It is a schematic diagram of the integrated structure of the three-phase terminal block and each connecting section. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Embodiment 1:

[0026] like Figures 1 to 3 An integrated filter stator structure is shown, comprising a stator core 1 and multiple groups of stator coils 2, wherein the stator core 1 is provided with a plurality of stator slots, the stator coils 2 are inserted into the stator slots and assembled with the stator core 1, and characterized in that: a mounting seat 3 is axially formed on the side wall of the stator core 1, a magnetic circuit dividing groove 4 is axially penetrated between the mounting seat 3 and the stator core 1, a wire passing hole 5 is axially penetrated on the mounting seat 3, an insulating paper 6 is inserted in the wire passing hole 5, a three-phase terminal is penetrated on the inner side of the insulating paper 6 on the wire passing hole 5, one end of the three-phase terminal extends out of the wire passing hole 5 to be connected with the three-phase outlet terminal of the stator coil 2, and the other end extends out of the wire passing hole 5 to be connected with the outside.

[0027] In the above technical solution, a mounting seat is arranged on the side wall of the stator core, a wire passing hole is opened on the mounting seat, and a three-phase terminal is passed through the wire passing hole to form a common mode filter, and the three-phase terminal is connected to the three-phase terminal of the stator coil. This solution directly uses the magnetic field generated by the stator core after power is turned on for filtering, without the need for additional electrical components such as capacitors, inductors and resistors, and can effectively reduce the installation size and cost of the filter (motor).

[0028] In addition, a magnetic circuit dividing groove is provided between the mounting base and the stator core to prevent the magnetic field in the stator core from interfering with the common mode filter. The insulating paper provides insulation protection for the wire hole to prevent discharge and protect the motor.

[0029] Furthermore, the axial ends of the mounting seat 3 are flush with the axial ends of the stator core 1. In this technical solution, the axial ends of the mounting seat are flush with the axial ends of the stator core, which can maximize the use of the magnetic field in the wire hole for filtering, while making sure that the axial sides of the mounting seat do not extend out of the stator core, and the axial installation size of the stator core is not increased.

[0030] Furthermore, the three-phase terminal includes three connecting rods 7 arranged at intervals, and the three connecting rods 7 are respectively connected to the three-phase output terminals of the stator coil 2 through connecting sections 8. The connecting section 8 includes a bending section 9 formed toward the side of the stator coil 2 and an arc section 10 extending outward along the side end of the bending section 9. The arc section 10 is wound around the outside of the stator slot, and the inner ends of the three arc sections 10 are respectively welded to the side ends of the three-phase output terminals of the stator coil 2 through welding sections 11.

[0031] In the above technical solution, the connecting rod of the three-phase terminal is connected to the three-phase outlet terminal of the stator coil through the connecting section. Since the positions of the three-phase outlet terminals of the stator coil are different, the lengths of the three connecting sections are also different; the connecting section includes a bent section and an arc section, and both are close to the stator coil side, without increasing the radial assembly size of the stator core; at the same time, the arc section and the three-phase outlet terminal of the stator coil are welded and fixed through a plurality of welding sections, with high connection strength and good integrity, which can effectively maintain the stability of the connecting rod in the wire hole.

[0032] Furthermore, the arc segment 10 is an arc segment with the same arc as the stator core 1. In this technical solution, the arc segment is an arc segment with the same arc as the stator core, and the welding segment can be adapted to the width of the three-phase output terminal of the stator coil, and then welded and fixed to the arc segment, so that the structural strength is stronger, and the arc segment in the middle can maintain an effective interval with the outer arc segment to avoid interference.

[0033] Furthermore, the axial outer end surface of the connecting section 8 is flush with the end surface of the stator coil 2. In this technical solution, the axial outer end surface of the connecting section is flush with the end surface of the stator coil, and the axial installation dimension of the stator core is not increased.

[0034] Furthermore, the connecting rod 7, the bending section 9 and the arc section 10 are integrally formed. In this technical solution, the connecting rod, the bending section and the arc section are integrally formed, and the integrated structure strength of the three-phase terminal and the connecting section is high, thereby making the connection stability between the three-phase terminal and the three-phase output terminal of the stator coil good. Embodiment 2:

[0035] A motor includes an integrated filter stator structure in the first embodiment.

[0036] In this specific embodiment, in order to solve the problem that the existing motor filter uses electrical components such as capacitors, which easily increases the motor assembly size and cost, the above scheme welds the three-phase terminal blocks to the three-phase output terminals of the stator coil, and uses the magnetic field after the stator core is energized for filtering, without destroying the original motor magnetic circuit, reducing the system EMC interference and shaft current impact, without the need to use other electrical components, and minimizing the motor installation size and cost.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. An integrated filter stator structure, comprising a stator core (1) and a plurality of groups of stator coils (2), wherein the stator core (1) is provided with a plurality of stator slots, and the stator coils (2) are inserted into the stator slots to be assembled with the stator core (1), characterized in that: A mounting seat (3) is axially formed on the side wall of the stator core (1); a magnetic circuit dividing groove (4) is axially penetrated between the mounting seat (3) and the stator core (1); a wire passing hole (5) is axially penetrated on the mounting seat (3); an insulating paper (6) is inserted into the wire passing hole (5); a three-phase wiring terminal is penetrated on the wire passing hole (5) on the inner side of the insulating paper (6); one end of the three-phase wiring terminal extends out of the wire passing hole (5) to be connected to the three-phase output terminal of the stator coil (2); and the other end extends out of the wire passing hole (5) to be connected to the outside.

2. The integrated filter stator structure according to claim 1, characterized in that: The two axial ends of the mounting seat (3) are flush with the two axial ends of the stator core (1).

3. The integrated filter stator structure according to claim 1, characterized in that: The three-phase terminal comprises three connecting rods (7) arranged at intervals, the three connecting rods (7) being connected to the three-phase output terminals of the stator coil (2) via connecting sections (8), the connecting sections (8) comprising a bending section (9) formed towards the side of the stator coil (2) and an arc section (10) extending outwardly along the side end of the bending section (9), the arc section (10) being wound around the outside of the stator slot, the inner ends of the three arc sections (10) being respectively welded to the side ends of the three-phase output terminals of the stator coil (2) via welding sections (11).

4. The integrated filter stator structure according to claim 3, characterized in that: The arc segment (10) is a circular arc segment having the same arc as the stator core (1).

5. The integrated filter stator structure according to claim 3, characterized in that: The axial outer end surface of the connecting section (8) is flush with the end surface of the stator coil (2).

6. The integrated filter stator structure according to claim 3, characterized in that: The connecting rod (7), the bent section (9) and the arc section (10) are integrally formed.

7. A motor, characterized in that: It comprises an integrated filter stator structure as described in any one of claims 1 to 6.

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