Motor stator insulation structure

Abstract

The utility model relates to the field of motors, in particular to a motor stator insulation structure, which comprises a stator framework. A plurality of winding frames are arranged on the stator framework in the circumferential direction of the stator framework, and winding grooves are formed between the adjacent winding frames; a wiring frame is constructed above the stator framework, and a wiring groove is constructed on the wiring frame; a wiring board can be fixedly connected to the wiring frame, a printed electrical circuit is preset in the wiring board, and a three-phase wire connector connected with the printed electrical circuit is constructed on the side, facing the winding frame, of the wiring board. The motor stator insulation structure can adopt the same set of winding framework to be compatible with 220V and 380V working environments.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a motor stator insulation structure. Background Art

[0002] In permanent magnet motors, the stator winding generally adopts distributed winding or concentrated winding. Compared with the distributed winding stator, the concentrated winding stator requires the stator core of the motor to be split. Its advantages are that in the permanent magnet motor using concentrated winding, the tooth slot torque is small, the length of the end connection is short, and the split core winding is more convenient. Concentrated winding has been widely used in permanent magnet motors. With the development of general permanent magnet servo motors, the application industry is becoming more and more extensive, and the requirements for servo motors are becoming more and more stringent. The original structure of the motor three-phase line needs to cross the line on the skeleton, and the U, V, W three-phase line cross-line position is not isolated. This structure is suitable for 220V working environment. However, when using 380V working voltage, due to the high voltage, the risk of phase-to-phase breakdown short circuit is high. The original design needs to develop a separate set of winding skeletons and use them separately in different voltage environments. Summary of the invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide a motor stator insulation structure, which can use the same set of winding skeletons to be compatible with 220V and 380V working environments.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A motor stator insulation structure comprises a stator frame; the stator frame is provided with a plurality of winding frames arranged along its circumference, and winding grooves are formed between adjacent winding frames; a wiring frame is constructed above the stator frame, and a wiring groove is constructed on the wiring frame; the characteristic is that a wiring board can be fixedly connected to the wiring frame, a printed electrical circuit is preset in the wiring board, and a three-phase line connector connected to the printed electrical circuit is constructed on the wiring board facing the winding frame.

[0006] The utility model adopts the above-mentioned technical solution, which relates to a motor stator insulation structure, in which the winding frame and winding grooves in the stator frame in the motor stator insulation structure constitute the winding area of ​​the stator, and the wiring grooves constructed in the wiring frame above the stator frame are the wiring area. In a 220V working environment, the three-phase lines U, V, and W can be wired in the wiring grooves without isolation. In a 380V working environment, this solution can be fixed with a wiring board on the wiring frame, and the wiring board is pre-set with a printed electrical circuit, and the printed electrical circuit is connected to the winding, so that the three-phase lines U, V, and W can be isolated, thereby improving the insulation capacity between phases and enhancing the reliability of the motor.

[0007] Through the above structure, the same winding frame can be used to be compatible with 220V and 380V working environments. When the terminal block wiring method is used in a 380V working environment, the end length of the motor can be shortened, thereby shortening the axial length of the motor.

[0008] In a further embodiment, the wiring rack is provided with a plurality of positioning hooks along its circumference, and a bayonet corresponding to the positioning hooks is constructed on the wiring board; the wiring board and the wiring rack are fixedly connected by the positioning hooks being inserted into the bayonet. The solution here can achieve rapid connection through the cooperation between the positioning hooks and the bayonet. In a specific solution, the wiring rack is provided with four positioning hooks along its circumference, and four bayonet corresponding to the positioning hooks are constructed on the wiring board.

[0009] Preferably, a coil is wound in the winding slot of the stator frame, and the winding slot and the coil therein are sealed by glue filling.

[0010] Preferably, the potting seal uses a high heat dissipation coefficient potting glue. Here, the solution performs potting treatment on the winding area and uses a high heat dissipation coefficient potting glue to increase the heat dissipation area of ​​the coil.

[0011] Preferably, the stator frame includes an outer annular enclosure plate, and a plurality of winding frames are circumferentially arranged on the outer wall of the outer annular enclosure plate; an annular mounting opening is formed between the ring enclosed by the inner end wall surfaces of the plurality of winding frames and the outer annular enclosure plate; the terminal block is constructed as an annular terminal block that covers and is fixedly connected above the annular mounting opening.

[0012] Preferably, the stator frame is a plastic frame, and the outer annular enclosure plate and the multiple winding frames inside the stator frame are integrally injection molded. After being installed with the whole machine, the stator frame can effectively absorb the vibration of the motor and reduce the problem of noise or resonance, that is, the vibration reduction effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the stator frame structure involved in the present invention.

[0014] Figure 2 The present invention is a schematic diagram of the wiring board structure involved in the present invention.

[0015] Figure 3 This is a three-dimensional diagram of the assembly status of the stator frame and the terminal block.

[0016] Figure 4 It is a side view of the assembly status of the stator frame and terminal board.

[0017] Figure 5 This is an exploded view of the assembly status of the stator frame and terminal board.

[0018] Figure 6 Schematic diagram of the bottom structure of the stator frame after potting.

[0019] Figure 7 This is the winding wiring diagram of the stator frame in a 220V environment.

[0020] Figure 8 for Figure 7 Enlarged view of part A.

[0021] Fig. 9 This is the winding connection diagram of the stator frame in a 380V environment.

[0022] Fig.10 This is the printed electrical circuit layout on the back of the terminal block. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figures 1 to 10 As shown, this embodiment relates to a motor stator insulation structure, including a stator frame 1. The stator frame 1 is arranged with a plurality of winding frames 11 along its circumference, and winding grooves 12 are formed between adjacent winding frames 11. A wiring frame 13 is constructed above the stator frame 1, and a wiring groove 14 is constructed on the wiring frame 13. A coil 2 is wound in the winding groove 12 of the stator frame 1, and the winding groove 12 and the coil 2 therein are sealed with glue, and the glue sealing uses a high heat dissipation coefficient potting glue. Here, the scheme increases the heat dissipation area of ​​the coil 2 by potting the winding area and using a high heat dissipation coefficient potting glue. The material of the high heat dissipation coefficient potting glue mainly includes fillers with high thermal conductivity. The thermal conductivity of the thermal conductive potting glue is mainly improved by the internal high thermal conductivity filler [powder], while the thermal conductivity of the base material of the potting glue [such as silica gel] itself is relatively low. Traditional high thermal conductivity materials usually include metals, metal oxides, metal nitrides and some other non-metallic materials [such as graphite, diamond]. However, in addition to the thermal conductivity requirement, thermal conductive potting glue usually also needs to have good electrical insulation performance, and cost is also a factor that needs to be considered. Therefore, the most common fillers in practical applications are metal oxides and metal nitrides, such as aluminum oxide, zinc oxide, aluminum nitride, boron nitride, silicon carbide, silica lime, etc.

[0029] In a further embodiment, the stator frame 1 is a plastic frame, and the outer annular enclosure and the multiple winding frames 11 inside thereof are integrally injection molded. After being installed with the whole machine, it can effectively absorb the vibration of the motor and reduce the problem of noise or resonance, that is, the vibration reduction effect is good. Figure 7 and 10 As shown, the stator frame 1 includes an outer annular enclosure 10, and a plurality of winding frames 11 are circumferentially arranged on the outer wall of the outer annular enclosure 10. An annular installation opening is formed between the ring enclosed by the inner end wall surfaces of the plurality of winding frames 11 and the outer annular enclosure 10.

[0030] The wiring frame 13 can be fixedly connected with a wiring board 3, and the wiring board 3 is constructed as an annular wiring board that covers and is fixed above the annular installation opening. A printed electrical circuit 31 is preset in the wiring board 3, and a three-phase line connector 32 connected to the printed electrical circuit 31 is constructed on the wiring board 3 facing the winding frame 11. The winding frame 11 and the winding groove 12 in the stator frame 1 in the motor stator insulation structure constitute the winding area of ​​the stator, and the wiring groove 14 constructed in the wiring frame 13 above the stator frame 1 is the wiring area. In a 220V working environment, the U, V, and W three-phase lines can be connected in the wiring groove 14 without isolation. In a 380V working environment, this solution can be fixedly connected with a wiring board 3 on the wiring frame 13, and the printed electrical circuit 31 is preset in the wiring board 3. The printed electrical circuit 31 is connected to the winding, and the U, V, and W three-phase lines can be isolated, thereby improving the insulation capacity between phases and enhancing the reliability of the motor. Through the above structure, the same set of winding skeletons can be used to be compatible with 220V and 380V working environments. And when the wiring method of the terminal block 3 is used in a 380V working environment, the end length of the motor can also be shortened, shortening the axial length of the motor. In a further implementation scheme, the wiring rack 13 is arranged with a plurality of positioning hooks 131 along its circumference, and the terminal block 3 is constructed with a bayonet 33 corresponding to the positioning hook 131. The terminal block 3 and the wiring rack 13 are fixedly connected by the positioning hook 131 being snapped into the bayonet 33. Here, the scheme can achieve rapid fixing by the cooperation of the positioning hook 131 and the bayonet 33. In a specific scheme, the wiring rack 13 is arranged with four positioning hooks 131 along its circumference, and the terminal block 3 is constructed with four bayonet 33 corresponding to the positioning hook 131.

[0031] The U, V, W three-phase wiring in the motor stator insulation structure described in this embodiment and the printed electrical circuit 31 on the terminal block 3 can be designed according to actual use. Figure 7-10 For example: Figure 7 and Fig. 9 The figure shows the winding connection diagram of the same motor stator in 220V and 380V working environments respectively. Figure 7 and 8 As shown, in a 220V working environment, the U, V, and W three-phase wires can be directly connected in the wiring slot 14 without isolation. Fig.10 Shown with Fig. 9 The layout diagram of the printed electrical circuit 31 on the wiring board 3 corresponding to the wiring method shown in the figure is as follows: Fig. 9 The winding ends shown are Fig.10 The three-phase line connector 32 shown can be connected accordingly.

[0032] 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.

[0033] 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 of 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. A motor stator insulation structure, comprising a stator frame (1); the stator frame (1) is provided with a plurality of winding frames (11) arranged along its circumference, and winding grooves (12) are formed between adjacent winding frames (11); a wiring frame (13) is constructed above the stator frame (1), and a wiring groove (14) is constructed on the wiring frame (13); the characteristics are: A wiring board (3) can be fixedly connected to the wiring frame (13), a printed electrical circuit (31) is preset in the wiring board (3), and a three-phase line connector (32) connected to the printed electrical circuit (31) is constructed on the wiring board (3) on the side facing the winding frame (11).

2. The motor stator insulation structure according to claim 1, characterized in that: The wiring frame (13) is provided with a plurality of positioning hooks (131) arranged along its circumference, and a bayonet (33) corresponding to the positioning hooks (131) is constructed on the wiring board (3); the wiring board (3) and the wiring frame (13) are fixedly connected by the positioning hooks (131) being engaged with the bayonet (33).

3. The motor stator insulation structure according to claim 1, characterized in that: The wiring frame (13) is provided with four positioning hooks (131) arranged along its circumference, and the wiring board (3) is provided with four bayonet holes (33) corresponding to the positioning hooks (131).

4. The motor stator insulation structure according to claim 1, characterized in that: A coil (2) is wound in the winding groove (12) of the stator frame (1), and the winding groove (12) and the coil (2) therein are sealed by glue injection.

5. The motor stator insulation structure according to claim 3, characterized in that: The potting seal uses a high heat dissipation coefficient potting glue.

6. The motor stator insulation structure according to claim 1, characterized in that: The stator frame (1) comprises an outer annular enclosure plate (10), and a plurality of winding frames (11) are arranged on the outer wall of the outer annular enclosure plate (10) along the circumferential direction; an annular installation opening is formed between the ring enclosed by the inner end wall surfaces of the plurality of winding frames (11) and the outer annular enclosure plate (10); and the terminal block (3) is constructed as an annular terminal block (3) that covers and is fixedly connected above the annular installation opening.

7. The motor stator insulation structure according to claim 6, characterized in that: The stator frame (1) is a plastic frame, and the outer annular enclosure (10) and the plurality of winding frames (11) inside thereof are integrally injection molded.

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