A structure for facilitating installation of a hall in an embedded magnetic steel permanent magnet motor

Abstract

This utility model discloses a structure for easy Hall sensor installation in an embedded permanent magnet motor, including a stator, a rotor, and a mounting assembly connected to the stator. The mounting assembly includes a mounting plate and a fixing bracket. The mounting plate and the fixing bracket are fixedly connected by a snap-fit ​​connection. The fixing bracket is fixedly connected to the stator. After the mounting plate is fixedly connected to the stator via the fixing bracket, the mounting plate is located outside the stator. A Hall sensor is mounted on the mounting plate. This utility model, through its designed mounting assembly, not only facilitates the installation of the Hall structure, but also makes the separate design and manufacturing of the mounting assembly very convenient. This design avoids strong electromagnetic and high-temperature areas for the Hall sensor, enabling the Hall sensor to accurately read the polarity of the rotor magnetic poles.

Description

Technical Field

[0001] This utility model belongs to the field of Hall effect mounting technology, specifically relating to a structure for easy Hall effect mounting in embedded permanent magnet motors. Background Technology

[0002] Existing motors use Hall effect sensors to detect the rotor position in real time. The detected rotor position signal is fed back to the controller to realize the commutation of the motor and generate a rotating magnetic field of synchronous rotor in the stator.

[0003] In traditional embedded magnet motors, Hall sensors are installed on the inner wall of the stator coil winding core, forming a radial electric field induction on the circumferential surface with the rotor magnets. This ensures the position and angle of the Hall sensor and is also low in cost. However, there are several difficult-to-solve drawbacks. First, the Hall sensor always operates in a high-temperature and high-electromagnetic environment. The Hall sensor works in the strong electromagnetic environment of the motor's high-current overload operation, which causes the Hall sensor to fail to read the polarity of the rotor magnets under strong electromagnetic interference and thus cannot work. Moreover, the installation space is very narrow (especially in flat wire motors, there is no installation space for the Hall sensor), resulting in an inaccurate relative position between the Hall sensor and the rotor.

[0004] To address this issue, the market has designed brackets for mounting Hall effect sensors. However, the existing bracket structures are relatively difficult to install, and the processing and installation must meet high precision requirements. Therefore, it is essential to improve upon the shortcomings of the existing structures. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned in the background art and to provide a structure for easy Hall effect installation in embedded permanent magnet motors.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a structure for easy Hall sensor installation in an embedded permanent magnet motor, including a stator and a rotor, wherein a stator coil winding is provided on the stator and a magnetic steel sheet is provided on the rotor; it also includes a mounting assembly connected to the stator, the mounting assembly including a mounting plate and a fixing bracket, wherein the mounting plate and the fixing bracket are snap-fitted together, the fixing bracket is fixedly connected to the stator, and after the mounting plate is fixedly connected to the stator through the fixing bracket, the mounting plate is located outside the stator, and a Hall sensor is provided on the mounting plate, thereby allowing the Hall sensor on the mounting plate to avoid the strong electromagnetic area of ​​the stator coil winding and the high temperature area generated when the stator coil winding is working, and at the same time, the Hall sensor corresponds to the outer edge of the rotor end, so that the Hall sensor and the outer edge of the magnetic steel sheet on the rotor form a magnetic field induction.

[0007] In the aforementioned structure for facilitating Hall effect installation in an embedded permanent magnet motor, the fixed bracket is fixedly connected to the stator end by adhesive bonding.

[0008] In the aforementioned structure for facilitating Hall effect installation in an embedded permanent magnet motor, the fixed bracket is provided with a fixed column, and the mounting plate is provided with a fixing hole that mates with the fixed column.

[0009] In the aforementioned structure for facilitating Hall effect installation in an embedded permanent magnet motor, the fixed bracket is provided with a fixed boss, and the stator end is provided with a fixed groove that corresponds to and cooperates with the fixed boss. The fixed bracket is then bonded together with the fixed boss and the fixed groove.

[0010] In the aforementioned structure for facilitating Hall effect installation in an embedded permanent magnet motor, the fixing slot extends to the inner side of the stator end.

[0011] In the aforementioned structure for facilitating Hall effect installation in an embedded permanent magnet motor, the fixing slot extends to the outer side of the stator end.

[0012] In the aforementioned structure for facilitating Hall effect installation in an embedded permanent magnet motor, a positioning step surface is provided between the fixed boss and the fixed bracket, and the positioning step surface abuts against the stator end face.

[0013] In the aforementioned structure for facilitating Hall effect installation in an embedded permanent magnet motor, the fixed bracket is provided with a fixed lug. The fixed bracket passes through the flat wires of the stator coil winding, and the fixed lug on the fixed bracket abuts against the side of the flat wire of the stator coil winding.

[0014] This utility model has the following beneficial effects: This invention, through its designed mounting components, not only facilitates the installation of the Hall effect sensor compared to existing mounting structures, but also greatly simplifies the manufacturing and processing of the modular mounting components. The installation method using this structure allows the Hall sensor to be installed outside the stator, simultaneously forming a magnetic field with the side of the magnets on the rotor. Combined with the positioning of the stator coil windings, the Hall sensor is mounted on the side of the rotor and reads the surface magnetic poles reflected from the embedded magnets onto the rotor core. In this way, the Hall sensor avoids areas of strong electromagnetic fields and high temperatures, enabling it to accurately read the polarity of the rotor's magnetic poles.

[0015] Especially for stator coil windings with flat wires, this structural design makes installation more convenient. Simply install the mounting plate by using a fixing bracket to fix it to the stator end. This makes installation easier and keeps the Hall sensor away from the high-heat and high-electromagnetic environment. The Hall sensor and the rotor's magnetic surface can be separated by a certain distance to ensure rotor installation. Attached Figure Description

[0016] Figure 1 This is a perspective view of Embodiment 1 of this utility model; Figure 2 This is a perspective view of Embodiment 1 of the present invention (excluding the stator coil winding); Figure 3 This is an exploded view of Embodiment 1 of this utility model; Figure 4 This is a perspective view of Embodiment 1 of this utility model (the mounting plate is fan-shaped); Figure 5 This is a perspective view of the mounting plate in Embodiment 1 of this utility model; Figure 6 This is a perspective view of the fixed bracket in Embodiment 1 of this utility model; Figure 7 This is a perspective view of the stator in Embodiment 1 of this utility model; Figure 8 This is a perspective view of the stator in Embodiment 2 of this utility model; Figure 9 This is a perspective view of Embodiment 3 of this utility model; Figure 10 This is a perspective view of Embodiment 3 of this utility model (excluding the stator coil winding). Detailed Implementation

[0017] The present invention will be further described in conjunction with the accompanying drawings. Example

[0018] Please see Figures 1 to 7 This utility model provides a structure for easy Hall effect installation in an embedded permanent magnet motor, including a stator 1 and a rotor 2. The stator 1 has stator coil windings 3, and the rotor 2 has magnet plates 4. It also includes a mounting assembly 5 connected to the stator 1, comprising a mounting plate 6 and a fixing bracket 7. The mounting plate 6 and the fixing bracket 7 are fixedly connected by a snap-fit ​​mechanism. Figure 2 , Figure 4As shown, the mounting plate 6 can be ring-shaped or fan-shaped, depending on the requirements. The fixing bracket 7 is fixedly connected to the stator 1. After the mounting plate 6 is fixedly connected to the stator 1 through the fixing bracket 7, the mounting plate 6 is located outside the stator 1. A Hall sensor 8 is provided on the mounting plate 6, so that the Hall sensor 8 on the mounting plate 6 avoids the strong electromagnetic area of ​​the stator coil winding 3 and the high temperature area generated when the stator coil winding 3 is working. At the same time, the Hall sensor 8 corresponds to the outer edge of the rotor 2 end, so that the Hall sensor 8 and the outer edge of the magnet 4 on the rotor 2 form a magnetic field induction.

[0019] Preferably, the fixed bracket 7 is fixedly connected to the end of the stator 1 by adhesive bonding, but other connection methods can also be used.

[0020] Specifically, the fixed bracket 7 is provided with a fixed post 9, and the mounting plate 6 is provided with a fixing hole 10 that mates with the fixed post 9. During installation, the mounting plate 10 is snapped into the fixed post 9 through the fixing hole, thereby forming a fixed connection with the fixed bracket 7.

[0021] Furthermore, the fixed bracket 7 is provided with a fixed boss 11, and the end of the stator 1 is provided with a fixed groove 12 that corresponds to and mates with the fixed boss 11. The fixed bracket 7 is glued together by the fixed boss 11 and the fixed groove 12. During installation, the fixed bracket 7 is first fixed to the end of the stator 1 by the engagement of the fixed boss 11 and the fixed groove 12, and then the mounting plate 10 is snapped together with the fixed bracket 7.

[0022] Furthermore, in this embodiment, the fixing groove 12 extends to the inner side of the end of the stator 1.

[0023] Furthermore, in order to improve the stability of the connection, a positioning step surface 15 is provided between the fixed boss 11 and the fixed bracket 7, and the positioning step surface 15 abuts against the end face of the stator 1. Example

[0024] Please see Figure 8 This utility model provides a structure for easy Hall effect installation in embedded permanent magnet motors. Unlike Embodiment 1, in this embodiment, the fixing groove 12 extends to the outer side of the stator 1 end. Example

[0025] Please see Figure 9 , Figure 10This utility model provides a structure for easy Hall effect installation in an embedded permanent magnet motor. Unlike Embodiments 1 and 2, the fixing bracket 7 in this embodiment is provided with a fixing lug 13. The fixing bracket 7 passes through the flat wires 3-1 of the stator coil winding 3, and the fixing lug 13 on the fixing bracket 7 abuts against the side of the flat wires of the stator coil winding 3. In this embodiment, the fixing bracket 7 is directly and entirely glued to the end face of the stator 1, and is positioned and installed in conjunction with the flat wires 3-1 of the stator coil winding 3.

[0026] The above provides a detailed description of a structure and motor for easy Hall effect installation in an embedded permanent magnet motor, as provided by the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions disclosed in this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A structure for easy Hall effect installation in an embedded permanent magnet motor, comprising a stator (1) and a rotor (2), wherein a stator coil winding (3) is provided on the stator (1) and a magnet sheet (4) is provided on the rotor (2); characterized in that: It also includes an installation assembly (5) connected to the stator (1). The installation assembly (5) includes an installation plate (6) and a fixing bracket (7). The installation plate (6) and the fixing bracket (7) are fixedly connected by a snap fastener. The fixing bracket (7) is fixedly connected to the stator (1). After the installation plate (6) is fixedly connected to the stator (1) through the fixing bracket (7), the installation plate (6) is located outside the stator (1). A Hall sensor (8) is provided on the installation plate (6), so that the Hall sensor (8) on the installation plate (6) avoids the strong electromagnetic area of ​​the stator coil winding (3) and the high temperature area generated when the stator coil winding (3) is working. At the same time, the Hall sensor (8) corresponds to the outer edge of the rotor (2) end, so that the Hall sensor (8) and the outer edge of the magnet (4) on the rotor (2) form a magnetic field induction.

2. The structure for facilitating Hall effect installation in an embedded permanent magnet motor according to claim 1, characterized in that: The fixed bracket (7) is fixedly connected to the end of the stator (1) by adhesive bonding.

3. The structure for facilitating Hall effect installation in an embedded permanent magnet motor according to claim 1, characterized in that: The fixed bracket (7) is provided with a fixed column (9), and the mounting plate (6) is provided with a fixing hole (10) that cooperates with the fixed column (9).

4. A structure for facilitating Hall effect installation in an embedded permanent magnet motor according to any one of claims 1 to 3, characterized in that: The fixed bracket (7) is provided with a fixed boss (11), and the end of the stator (1) is provided with a fixed groove (12) that corresponds to and cooperates with the fixed boss (11). The fixed bracket (7) is bonded between the fixed boss (11) and the fixed groove (12).

5. A structure for facilitating Hall effect installation in an embedded permanent magnet motor according to claim 4, characterized in that: The fixing groove (12) extends to the inner side of the end of the stator (1).

6. A structure for facilitating Hall effect installation in an embedded permanent magnet motor according to claim 4, characterized in that: The fixing groove (12) extends to the outer side of the end of the stator (1).

7. A structure for facilitating Hall effect installation in an embedded permanent magnet motor according to claim 4, characterized in that: A positioning step surface (15) is also provided between the fixed boss (11) and the fixed bracket (7), and the positioning step surface (15) abuts against the end face of the stator (1).

8. A structure for facilitating Hall effect installation in an embedded permanent magnet motor according to any one of claims 1 to 3, characterized in that: The fixed bracket (7) is provided with a fixed lug (13). The fixed bracket (7) passes through the flat wire (3-1) of the stator coil winding (3). The fixed lug (13) on the fixed bracket (7) abuts against the side of the flat wire of the stator coil winding (3).

Images