A new type of permanent magnet synchronous motor controller housing assembly

Abstract

The utility model relates to the technical field of the shell of controller, concretely to a new -type permanent magnet synchronous motor controller shell subassembly, including base and top cap, base and top cap are connected through hinge, and the frame of base and the frame of top cap are embedded with pre -fixed structure, and pre -fixed structure is used for connecting top cap and base, and top cap and base are positioned through pre -positioning assembly, beneficial effect is: when closing, the left and right sides embedding of top cap. Magnetic steel sheet because of magnetic force will be attracted on the metal sheet, at the same time because top cap and base close, the vertical board on the base will enter vertical groove, and the sphere embedded in the side of vertical board rotates along the convex hull surface, because of the flexibility of convex hull, make the sphere be stuck in the upper arc edge of convex hull, then the front of shell is installed through two groups of screws, realize reliable clamping and quick opening and closing of top cap and base, avoid the traditional installation on the corner through multiple groups of screws, and it is very inconvenient when disassembling or installing.

Description

Technical Field

[0001] This utility model relates to the field of controller housings, specifically a novel housing assembly for a permanent magnet synchronous motor controller. Background Technology

[0002] The permanent magnet synchronous motor and the motor controller are connected via power lines and signal lines. The permanent magnet synchronous motor consists of a stator, rotor, shaft, bearings, end caps, and position sensors. The motor controller consists of an input rectifier circuit, a DC bus filter circuit, a three-phase inverter bridge, a control core, a drive circuit, and a signal acquisition and protection module. The power lines are connected between the stator winding terminals of the permanent magnet synchronous motor and the output terminals of the inverter module of the motor controller. The signal lines are led out from the position sensor interface on the motor and connected to the signal acquisition module inside the motor controller.

[0003] However, in existing technologies, such as the SDJ-5KW AC motor controller, the top cover and base are installed using multiple sets of screws, which are located on the corners of the top cover. This makes installation and disassembly extremely difficult, requiring the removal of multiple sets of screws to separate the top cover and base. Utility Model Content

[0004] The purpose of this invention is to provide a novel housing assembly for a permanent magnet synchronous motor controller to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a base and a top cover, connected by hinges, a permanent magnet synchronous motor body connected to a controller, and the permanent magnet synchronous motor body and the controller connected by power lines and signal lines. A pre-fixing structure is embedded between the frame of the base and the frame of the top cover, the pre-fixing structure being used to connect the top cover and the base. The top cover and the base are positioned by a pre-positioning component. Two sets of protrusions are fixed on the front surface of the top cover, and screws are screwed onto the surfaces of both sets of protrusions, with the bottom ends of the screws screwed into the base. The two sets of protrusions are located at two corners of the top cover.

[0006] Preferably, the pre-fixed structure includes an upper mounting base, a magnet, a metal sheet, and a lower mounting base. The upper mounting base is screwed into the bottom of the top cover. The magnet is glued to the bottom surface of the upper mounting base. There are two sets of lower mounting bases, both of which are screwed into the surface of the base and are located directly below the upper mounting base. The lower and upper mounting bases correspond one-to-one. The metal sheet is glued to the top surface of the lower mounting base. The outer surface of the magnet is flush with the bottom surface of the top cover, and the outer surface of the metal sheet is flush with the upper surface of the base. The two sets of upper and lower mounting bases are symmetrically distributed about the center of the base.

[0007] Preferably, two sets of installation grooves are provided on the surfaces of the top cover and the base, and the upper installation seat and the lower installation seat are both embedded inside the two sets of installation grooves.

[0008] Preferably, the pre-positioning assembly comprises a vertical plate, a sphere and a convex hull, the vertical plate is fixed on the upper surface of the base, the sphere is embedded in the vertical plate, a vertical groove is provided on the edge of the top cover, the length and height dimensions of the vertical plate are equal to the width and height dimensions of the vertical groove, the width dimension of the vertical plate is smaller than the width dimension of the vertical groove, the convex hull is fixed on the surface of the vertical groove, the convex hull is of a circular arc structure with an outwardly protruding cross-section, the diameter of the circular arc edge of the convex hull is smaller than the diameter of the semi-circular arc, the convex hull is made of flexible material, two sets of the vertical plate, the sphere and the convex hull are provided, the two sets of vertical plates, spheres and convex hulls are all distributed symmetrically left and right about the center of the base, and the pre-positioning assembly is located outside the pre-fixing structure.

[0009] Preferably, a groove is provided on the surface of the vertical plate, the sphere rotates in the groove, the groove is of a "convex"-shaped structure, the opening diameter of the groove is smaller than the diameter of the sphere, one end of the sphere is located outside the groove, and when the base and the top cover are closed, one end of the sphere is attached to the upper arc edge of the convex hull.

[0010] Compared with the prior art, the beneficial effects of the present utility model are: In the motor controller housing assembly proposed by the present utility model, when the cover is closed, the magnetic steel sheets embedded on the left and right sides of the top cover will be attracted to the metal sheets by magnetic force. Meanwhile, when the top cover and the base are closed, the vertical plate on the base will enter the vertical groove, and the sphere embedded on the side of the vertical plate will rotate along the surface of the convex hull. Due to the flexibility of the convex hull, the sphere is clamped on the upper arc edge of the convex hull, and then the front surface of the housing is installed through two sets of screws, so as to realize reliable clamping and rapid opening and closing of the top cover and the base, which avoids the problem of great inconvenience in disassembly or installation caused by the traditional installation with multiple sets of screws on the corners. Description of Drawings Figure 1 is the overall structural schematic diagram of the present utility model; Figure 2 is the Figure 1 structural schematic diagram of the present utility model after the top cover and the base are opened; Figure 3 is the structural schematic diagram of the pre-fixing structure of the present utility model; Figure 4 is the Figure 3 enlarged structural schematic diagram of part A in the present utility model; Figure 5 is the Figure 3 enlarged structural schematic diagram of part B in the present utility model; Figure 6 is the Figure 1 top-view structural schematic diagram of the present utility model; Figure 7 is the Figure 6 Schematic diagram of the cross-sectional structure along the middle AA direction; Figure 8 This utility model Figure 7 Enlarged structural diagram at point C.

[0011] In the diagram: 1. Base; 2. Top cover; 3. Protrusion; 4. Screw; 5. Mounting groove; 6. Upper mounting base; 7. Magnet plate; 8. Lower mounting base; 9. Metal plate; 10. Vertical plate; 11. Sphere; 12. Protrusion; 13. Groove; 14. Vertical slot; 15. Permanent magnet synchronous motor body; 16. Power line; 17. Signal line. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0013] Example 1 Please see Figures 1-8 This utility model provides a technical solution: a novel permanent magnet synchronous motor controller housing assembly, including a base 1 and a top cover 2, the base 1 and the top cover 2 are connected by a hinge, a permanent magnet synchronous motor body 15 is connected to the controller, the permanent magnet synchronous motor body 15 and the controller are connected by a power line 16 and a signal line 17, two sets of protrusions 3 are fixed on the front surface of the top cover 2, and screws 4 are screwed onto the surface of both sets of protrusions 3, and the bottom end of the screws 4 is screwed into the base 1, and the two sets of protrusions 3 are located at two corners of the top cover 2; Specifically, refer to Figure 2 It can be seen that the motor controller is mounted on the base 1 with screws and is covered by the top cover 2, as shown in the reference. Figure 1It is known that the top cover 2 is equipped with heat dissipation vents and a power interface. The permanent magnet synchronous motor body 15 consists of a stator, rotor, shaft, bearings, end cover, and position sensor. When the controller outputs a three-phase PWM modulated current, the stator winding generates a magnetic field that rotates with time. This magnetic field generates an electromagnetic force with the permanent magnet on the rotor, causing the rotor to rotate at an angular velocity synchronized with the magnetic field, thus realizing the output of mechanical energy. To achieve precise control, a position sensor is usually installed inside the motor to detect the rotor angle and speed in real time and feed the signal back to the controller. The motor controller consists of an input rectifier circuit, a DC bus filter circuit, a three-phase inverter bridge, a control core, a drive circuit, and a signal acquisition and protection module. It converts the externally supplied three-phase AC or DC power into a controllable three-phase PWM pulse current and outputs it to the permanent magnet synchronous motor. At the same time, it receives the position signal and current feedback returned by the motor in real time, calculates the current speed, angle, and load status, and dynamically adjusts the output waveform through a control algorithm to achieve precise control of the motor's operating status.

[0014] The power line 16 is connected between the stator winding terminals (U / V / W) of the motor and the output terminal of the inverter module of the controller to transmit three-phase drive current. The signal line 17 is led out from the position sensor interface on the motor and connected to the signal acquisition module inside the controller to transmit rotor position signal, speed signal and temperature information.

[0015] Example 2 On the basis of the first embodiment, in order to realize rapid opening, closing and disassembly between the top cover 2 and the base 1, a pre-fixing structure is embedded between the frame of the base 1 and the frame of the top cover 2. The pre-fixing structure is used for connecting the top cover 2 and the base 1, and comprises an upper mounting seat 6, a magnetic steel sheet 7, a metal sheet 9 and a lower mounting seat 8. The upper mounting seat 6 is embedded at the bottom end of the top cover 2 by screws, the magnetic steel sheet 7 is mounted on the bottom surface of the upper mounting seat 6 by adhesive, there are two sets of lower mounting seats 8, both sets of lower mounting seats 8 are embedded on the surface of the base 1 by screws, both sets of lower mounting seats 8 are located directly below the upper mounting seat 6, the lower mounting seats 8 correspond to the upper mounting seats 6 one to one, the metal sheet 9 is mounted on the top surface of the lower mounting seat 8 by adhesive, the outer surface of the magnetic steel sheet 7 is flush with the bottom surface of the top cover 2, the outer surface of the metal sheet 9 is flush with the upper surface of the base 1, the two sets of upper mounting seats 6 and lower mounting seats 8 are symmetrically distributed left and right about the center of the base 1, two sets of mounting grooves 5 are opened on both the surface of the top cover 2 and the surface of the base 1, the upper mounting seat 6 and the lower mounting seat 8 are both embedded inside the two sets of mounting grooves 5, the top cover 2 and the base 1 are positioned by a pre-positioning assembly, the pre-positioning assembly comprises a vertical plate 10, a sphere 11 and a convex hull 12, the vertical plate 10 is fixed on the upper surface of the base 1, the sphere 11 is embedded in the vertical plate 10, a vertical groove 14 is opened at the edge of the top cover 2, the length and height dimensions of the vertical plate 10 are equal to the width and height dimensions of the vertical groove 14, the width dimension of the vertical plate 10 is smaller than the width dimension of the vertical groove 14, the convex hull 12 is fixed on the surface of the vertical groove 14, the convex hull 12 is of a circular arc structure with an outwardly protruding cross-section, the diameter of the circular arc edge of the convex hull 12 is smaller than the diameter of a semi-circular arc, the convex hull 12 is made of flexible material, there are two sets of the vertical plate 10, the sphere 11 and the convex hull 12, both sets of the vertical plate 10, the sphere 11 and the convex hull 12 are symmetrically distributed left and right about the center of the base 1, the pre-positioning assembly is located outside the pre-fixing structure, a groove 13 is opened on the surface of the vertical plate 10, the sphere 11 is rotatably connected in the groove 13, the groove 13 is of a "convex" shaped structure, the opening diameter of the groove 13 is smaller than the diameter of the sphere 11, one end of the sphere 11 is located outside the groove 13, with reference to Figure 8 it can be known that when the base 1 and the top cover 2 are in a closed state, one end of the sphere 11 is attached to the upper arc edge of the convex hull 12; Specifically, when closing the cover, the magnetic steel sheets 7 embedded on the left and right sides of the top cover 2 will be attracted to the metal sheet 9 due to magnetic force. Meanwhile, when the top cover 2 and the base 1 are closed, the vertical plate 10 on the base 1 will enter the vertical groove 14, and the sphere 11 embedded on the side edge of the vertical plate 10 will rotate along the surface of the convex hull 12. Due to the flexibility of the convex hull 12, the sphere 11 is clamped on the upper arc edge of the convex hull 12, then the front side of the housing is mounted by two sets of screws 4, so as to realize reliable clamping and rapid opening and closing of the top cover 2 and the base 1, which avoids the problem that it is extremely inconvenient to disassemble or install when traditional installation is performed by using multiple sets of screws 4 at the corners; To reiterate, the convex bulge 12 is made of reinforced PA66 material, which has slight elasticity but does not collapse, making it suitable for locking structures and capable of withstanding multiple assembly steps. (Refer to...) Figure 8 As can be seen, the convex hull 12 is a convex arc shape that contacts the sphere 11 and thus gets stuck. At this time, the convex hull 12 only needs to deform a little to make the sphere 11 move up to the upper arc edge of the convex hull 12 and be tangent to it. However, the deformation toughness should not be too great, so as to avoid the convex hull 12 and the sphere 11 failing to get stuck due to excessive deformation of the convex hull 12.

[0016] When in use, when the cover is closed, the magnetic steel plates 7 embedded on the left and right sides of the top cover 2 will be attracted to the metal plate 9 by magnetic force. At the same time, when the top cover 2 and the base 1 are closed, the upright plate 10 on the base 1 will enter the upright groove 14. The ball 11 embedded on the side of the upright plate 10 will rotate along the surface of the protrusion 12. Due to the flexibility of the protrusion 12, the ball 11 will be stuck on the upper arc edge of the protrusion 12. Then, the front of the shell is installed by two sets of screws 4, realizing the reliable engagement and quick opening and closing of the top cover 2 and the base 1. This avoids the inconvenience of traditional installation on the corners by multiple sets of screws 4, which is extremely inconvenient during disassembly or installation.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel permanent magnet synchronous motor controller housing assembly, comprising a base (1) and a top cover (2), the base (1) and the top cover (2) being connected by hinges, a permanent magnet synchronous motor body (15) connected to the controller, the permanent magnet synchronous motor body (15) and the controller being connected by power lines (16) and signal lines (17), characterized in that: A pre-fixing structure is embedded between the border of said base (1) and the border of the top cover (2). The pre-fixing structure is configured to connect the top cover (2) and the base (1). The top cover (2) and the base (1) are positioned by a pre-positioning assembly. Two groups of convex blocks (3) are fixed on the front surface of the top cover (2), screws (4) are screwed onto the surfaces of both groups of convex blocks (3), the bottom ends of said screws (4) are screwed into the base (1), and the two groups of convex blocks (3) are located at two corners of the top cover (2).

2. The novel permanent magnet synchronous motor controller housing assembly according to claim 1, characterized in that: Said pre-fixing structure comprises an upper mounting seat (6), a magnetic steel sheet (7), a metal sheet (9) and a lower mounting seat (8). The upper mounting seat (6) is embedded at the bottom end of the top cover (2) by screws, the magnetic steel sheet (7) is mounted on the bottom surface of the upper mounting seat (6) by adhesive, there are two groups of lower mounting seats (8), both groups of lower mounting seats (8) are embedded on the surface of the base (1) by screws, and both groups of lower mounting seats (8) are located directly below the upper mounting seat (6), the lower mounting seats (8) correspond to the upper mounting seats (6) one by one, the metal sheet (9) is mounted on the top surface of the lower mounting seat (8) by adhesive, the outer surface of the magnetic steel sheet (7) is flush with the bottom surface of the top cover (2), the outer surface of the metal sheet (9) is flush with the upper surface of the base (1), and both the two groups of upper mounting seats (6) and lower mounting seats (8) are distributed symmetrically left and right about the center of the base (1).

3. The novel permanent magnet synchronous motor controller housing assembly according to claim 2, characterized in that: Two groups of mounting grooves (5) are opened on both the surface of said top cover (2) and the surface of said base (1), and the upper mounting seat (6) and the lower mounting seat (8) are both embedded inside the two groups of mounting grooves (5).

4. The novel permanent magnet synchronous motor controller housing assembly according to claim 1, characterized in that: Said pre-positioning assembly comprises a vertical plate (10), a sphere (11) and a convex hull (12). The vertical plate (10) is fixed on the upper surface of the base (1), the sphere (11) is embedded inside the vertical plate (10), a vertical slot (14) is opened at the edge of the top cover (2), the length and height dimensions of the vertical plate (10) are equal to the width and height dimensions of the vertical slot (14), the width dimension of the vertical plate (10) is smaller than the width dimension of the vertical slot (14), the convex hull (12) is fixed on the surface of the vertical slot (14), said convex hull (12) is of a circular arc structure with an outwardly protruding cross-section, the diameter of the circular arc edge of the convex hull (12) is smaller than the diameter of a semi-circular arc, the convex hull (12) is made of flexible material, two groups of vertical plates (10), spheres (11) and convex hulls (12) are provided, and the two groups of vertical plates (10), spheres (11) and convex hulls (12) are all distributed symmetrically left and right about the center of the base (1), and the pre-positioning assembly is located outside the pre-fixing structure.

5. A novel permanent magnet synchronous motor controller housing assembly according to any one of claims 2-4, characterized in that: A groove (13) is opened on the surface of said vertical plate (10), the sphere (11) rotates inside the groove (13), the groove (13) is of a "convex" shape structure, the opening diameter of the groove (13) is smaller than the diameter of the sphere (11), one end of the sphere (11) is located outside the groove (13), and when the base (1) and the top cover (2) are in a closed state, one end of the sphere (11) is attached to the upper arc edge of the convex hull (12).

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