Magnetic steel assembly of permanent magnet adjustable-speed motor

Abstract

The utility model discloses a permanent magnet adjustable-speed motor magnetic steel assembly, which relates to the technical field of motors and specifically comprises a positioning plate, a lightening hole is arranged at the edge of the surface of one side of the positioning plate, a shaft hole is arranged in the middle of one side of the positioning plate close to the lightening hole, and a magnetic steel sheet is fixedly mounted on the surface of one side of the positioning plate through a bolt. A magnetic steel through hole is formed in the edge of the surface of one side of the magnetic steel sheet, under extrusion of the locking nut, the outwards-protruding part is bent, the top of the outwards-protruding part can abut against the notch groove of the inner cavity of the magnetic steel sheet in a clamped mode, then a circle of Kevlar wire is wound in the lightening hole corresponding to the magnetic steel through hole, knotting is conducted, then the Kevlar wire is wound on the magnetic steel sheet in the direction where the magnetic steel sheet is located, and the magnetic steel sheet is fixed. The Kevlar wire is wound until the last circle of the Kevlar wire penetrates through the magnetic steel through hole in the tail end of the last annular array and is knotted, so that binding of the Kevlar wire to the magnetic steel sheet is completed, finally, epoxy glue is brushed on the periphery of the Kevlar wire for curing and shaping, the whole process is convenient to operate, and the magnetic steel sheet is fixed reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of electric motors, in particular to a magnetic steel assembly of a permanent magnet speed regulating electric motor. Background Art

[0002] After more than half a century of ultra-intensive mining, China's rare earth resource reserves and guaranteed years have continued to decline, the resources in major mining areas have accelerated their decline, and most of the original mine resources have been exhausted. Reducing the use of rare earths is urgent. The most commonly used rotor structures for built-in rare earth permanent magnet synchronous motors at home and abroad are "one" type, V-type, U-type, W-type and other slot structures. Among them, the U-type magnetic steel slot motor has become a commonly used design in China due to its high magnetic concentration and wide speed regulation range. However, the traditional U-type rare earth magnetic steel slot rotor design has defects such as high magnetic steel cost and low efficiency under high-speed NEDC conditions. In order to ensure that the motor performance remains unchanged while reducing the cost of magnetic steel, reducing the high-frequency iron loss of the motor, and improving the NEDC working efficiency of the motor, and developing low-cost magnetic materials such as ferrite and rare earth permanent magnet hybrid excitation, this patent proposes a new motor rotor structure: a U-shaped double-layer built-in permanent magnet synchronous motor rotor structure.

[0003] At present, when the magnet is pasted, the tooling needs to be cooperated for accurate positioning, which is troublesome to operate; at the same time, when the magnet is wrapped with the Kevlar wire for binding and fixing, there is no position for positioning the Kevlar wire, which is inconvenient to operate. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a permanent magnet speed regulating motor magnetic steel assembly, which can facilitate the magnetic steel pasting and can also facilitate the binding and fixing of the magnetic steel wrapped with Kevlar wire.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a permanent magnet speed regulation motor magnetic steel assembly includes a positioning plate, a weight reduction hole is provided at the edge of one side surface of the positioning plate, an axial hole is provided in the middle of one side of the positioning plate close to the weight reduction hole, a magnetic steel sheet is fixedly installed on the surface of one side of the positioning plate by bolts, a magnetic steel through hole is provided at the edge of one side surface of the magnetic steel sheet, one side of the magnetic steel through hole is adapted to the weight reduction hole, a same through hole is opened in the middle of one side surface of the magnetic steel sheet, a notch groove is provided in the through groove on one side surface of the magnetic steel sheet, a connecting magnetic shoe is movably connected in the notch groove on one side of the magnetic steel sheet, both sides of the connecting magnetic shoe are provided with outer protrusions, the connecting magnetic shoe is provided with an extension part close to the side of the outer protrusion, the extension parts on both sides of the magnetic shoe extend to the top of the axial hole, and the outer protrusions on the surface of the magnetic shoe are movably overlapped with the notch groove.

[0006] Optionally, the magnetic steel sheet and the positioning plate are fixedly connected by bolts. The number of the magnetic steel sheets is several and they are evenly distributed in the form of a horizontal array. Locking nuts are fixedly installed on the surfaces of the extensions at both ends of the magnetic tile. One end of the locking nut passes through one side of the magnetic tile and is fixedly connected to the positioning plate. Under the extrusion of the locking nut, the top of the outer convex portion is bent and tightly engaged with the notch groove in the inner cavity of the magnetic steel sheet. Then, a circle of Kevlar wire can be wrapped around the weight reduction hole corresponding to the magnetic steel through hole and a knot can be tied. Then, the Kevlar wire can be wrapped around the magnetic steel sheet in the direction of the magnetic steel sheet until the last circle of Kevlar wire is passed through the magnetic steel through hole at the end of the last circular array and a knot is tied. In this way, the Kevlar wire is bundled with the magnetic steel sheet. Finally, epoxy glue is brushed on the periphery of the Kevlar wire for curing and shaping. The whole process is easy to operate and the magnetic steel sheet is reliably fixed.

[0007] Optionally, the number of the weight-reducing holes is several and they are evenly distributed in a ring-shaped manner on the surface of the magnetic steel sheet. The outer arc surfaces of several of the magnetic steel sheets are movably sleeved with a stator core, and a hollow groove is provided on one side surface of the stator core.

[0008] Optionally, the number of the hollow slots is several and they are evenly distributed in the form of a ring array, the hollow slots are opened in the middle of each stator core, and one side surface of the stator core is a hollow through structure.

[0009] Optionally, the hollow structure on one side of the stator core is penetrated and connected with the magnetic steel sheet, the inner arc surfaces of the two hollow slots are cross-connected with stator windings, and the outer arc surfaces of the stator windings respectively penetrate one side and the other side of the two hollow slots.

[0010] Optionally, the number of the magnetic tiles is two, and they are distributed in a mirror-symmetrical manner on the inner top and inner bottom of the through hole of the magnetic steel sheet.

[0011] Optionally, the outer protrusion on the surface of the magnetic tile is overlapped and matched with several of the magnetic steel sheets, and the surface of the axial hole on one side of the positioning plate is fixedly connected to the extension portion of one end of the magnetic tile. The heat generated by the stator core is dissipated outward through the machine base, and the gap between the hollow slot on one side of the stator core and the stator winding is for better air circulation, thereby improving the heat dissipation effect.

[0012] The utility model provides a permanent magnet speed regulating motor magnetic steel assembly, which has the following beneficial effects:

[0013] 1. Under the extrusion of the locking nut, the top of the outer convex part will bend and tightly fit with the notch groove in the inner cavity of the magnetic steel sheet. Then, a circle of Kevlar wire can be wrapped around the weight-reducing hole corresponding to the magnetic steel through-hole and a knot can be tied. Then, the Kevlar wire can be wrapped around the magnetic steel sheet in the direction of the magnetic steel sheet until the last circle of Kevlar wire is passed through the magnetic steel through-hole at the end of the last circular array and a knot is tied. In this way, the Kevlar wire is bundled with the magnetic steel sheet. Finally, epoxy glue is brushed on the outer periphery of the Kevlar wire for curing and shaping. The whole process is easy to operate and the magnetic steel sheet is reliably fixed.

[0014] 2. The heat generated by the stator core needs to be dissipated outward through the base, and the gap between the hollow slot on one side of the stator core and the stator winding is to allow air to circulate better, thereby improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the side section structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the disassembled structure of the utility model;

[0019] Figure 4 It is a partial structural schematic diagram of the utility model.

[0020] In the figure: 1. positioning plate; 2. weight reduction hole; 3. shaft hole; 4. magnetic steel sheet; 5. magnetic steel through hole; 6. notch groove; 7. magnetic tile; 701. outer protrusion; 702. extension; 8. locking nut; 9. stator core; 10. hollow slot; 11. stator winding. DETAILED DESCRIPTION

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0022] See also Figures 1 to 4 The utility model provides a technical solution: a permanent magnet speed regulating motor magnetic steel assembly, including a positioning plate 1, a weight reduction hole 2 is provided at the edge of one side surface of the positioning plate 1, an axial hole 3 is provided in the middle of one side of the positioning plate 1 close to the weight reduction hole 2, a magnetic steel sheet 4 is fixedly installed on the surface of one side of the positioning plate 1 by bolts, a magnetic steel through hole 5 is provided at the edge of one side surface of the magnetic steel sheet 4, one side of the magnetic steel through hole 5 is adapted to the weight reduction hole 2, a same through hole is opened in the middle of one side surface of the magnetic steel sheet 4, a notch groove 6 is provided in the through groove on one side surface of the magnetic steel sheet 4, and a connecting member is movably connected in the notch groove 6 on one side of the magnetic steel sheet 4 The magnetic tile 7 is connected, and both sides of the magnetic tile 7 are provided with an outer protrusion 701. The side of the magnetic tile 7 close to the outer protrusion 701 is provided with an extension portion 702. The extension portions 702 on both sides of the magnetic tile 7 extend to the top of the shaft hole 3. The outer protrusion 701 on the surface of the magnetic tile 7 is movably overlapped with the notch groove 6. The magnetic steel sheet 4 is fixedly connected to the positioning plate 1 by bolts. The number of magnetic steel sheets 4 is several and is evenly distributed in the form of a horizontal array. Locking nuts 8 are fixedly installed on the surface of the extension portions 702 at both ends of the magnetic tile 7. One end of the locking nut 8 passes through one side of the magnetic tile 7 and is fixedly connected to the positioning plate 1.

[0023] Under the extrusion of the locking nut 8, the top of the outer protrusion 701 is bent and tightly engaged with the notch groove 6 in the inner cavity of the magnetic steel sheet 4. Then, a circle of Kevlar wire can be wrapped around the weight reduction hole 2 corresponding to the magnetic steel through hole 5 and a knot can be tied. Then, the Kevlar wire is wrapped around the magnetic steel sheet 4 in the direction of the magnetic steel sheet 4 until the last circle of Kevlar wire is passed through the magnetic steel through hole 5 at the end of the last circular array and a knot is tied. In this way, the Kevlar wire is bundled with the magnetic steel sheet 4. Finally, epoxy glue is brushed on the outer periphery of the Kevlar wire for curing and shaping. The whole process is easy to operate and the magnetic steel sheet 4 is reliably fixed.

[0024] The number of the weight-reducing holes 2 is several and evenly distributed in annular form on the surface of the magnetic steel sheet 4. The outer arc surface of several magnetic steel sheets 4 is movably sleeved with a stator core 9. A hollow groove 10 is provided on one side surface of the stator core 9. The number of the hollow grooves 10 is several and evenly distributed in an annular array. The hollow groove 10 is opened in the middle of each stator core 9. The surface of one side of the stator core 9 is a hollow through structure. The inside of the hollow structure on one side of the stator core 9 is connected to the magnetic steel sheet 4. The sheets 4 are connected through and through, the inner arc surfaces of the hollow slots 10 are cross-connected with the stator windings 11, and the outer arc surfaces of the stator windings 11 respectively penetrate to one side and the other side of the hollow slots 10. There are two magnetic tiles 7, which are distributed in a mirror-symmetrical manner on the inner top and bottom of the through holes of the magnetic steel sheets 4. The outer protrusions 701 on the surfaces of the magnetic tiles 7 overlap and fit with several magnetic steel sheets 4, and the surface of the axial hole 3 on one side of the positioning plate 1 is fixedly connected to the extension 702 at one end of the magnetic tile 7.

[0025] The heat generated by the stator core 9 is dissipated outward through the base, and the gap between the hollow slot 10 on one side of the stator core 9 and the stator winding 11 is for better air circulation, thereby improving the heat dissipation effect.

[0026] In the utility model, the working steps of the device are as follows:

[0027] The magnetic steel through holes 5 are evenly distributed throughout the magnetic steel sheet 4, and the positioning plate 1 has weight-reducing holes 2 that are evenly distributed around the magnetic steel through holes 5 and correspond to each other. After the correspondence, the magnetic tile 7 is placed in the notch groove 6 opened in the inner cavity in the middle of the magnetic steel through hole 5, and the extensions 702 at both ends are extended and placed on the surface of the positioning plate 1, and then the locking nuts 8 are punched on the surface of the extensions 702. Because the magnetic tile 7 is an elastic structure, it is squeezed by the locking nuts 8 at both ends, and the outer protrusion 701 at the top of the bending will be tightly connected with the notch groove 6 in the inner cavity of the magnetic steel sheet 4. Then, a circle of Kevlar wire can be wound around the weight-reducing hole 2 corresponding to the magnetic steel through hole 5 and punched. A knot is made, and then the Kevlar wire is wound around the magnetic steel sheet 4 in the direction of the magnetic steel sheet 4, until the last circle of Kevlar wire is passed through the magnetic steel through hole 5 at the end of the last circular array, and a knot is tied, so that the Kevlar wire is bundled with the magnetic steel sheet 4, and finally epoxy glue is brushed on the periphery of the Kevlar wire for curing and shaping. The whole process is easy to operate, the magnetic steel sheet 4 is reliably fixed, and during the operation of the motor, the heat generated by the stator core 9 is dissipated outward through the base, and the gap between the hollow slot 10 on one side of the stator core 9 and the stator winding 11 is for better air circulation, thereby improving the heat dissipation effect.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet speed regulating motor magnetic steel assembly, comprising a positioning plate (1), characterized in that: A weight-reducing hole (2) is provided at the edge of one side surface of the positioning plate (1), an axial hole (3) is provided in the middle of one side of the positioning plate (1) near the weight-reducing hole (2), a magnetic steel sheet (4) is fixedly mounted on one side surface of the positioning plate (1) by bolts, a magnetic steel through hole (5) is provided at the edge of one side surface of the magnetic steel sheet (4), one side of the magnetic steel through hole (5) is matched with the weight-reducing hole (2), a same through hole is opened in the middle of one side surface of the magnetic steel sheet (4), and the magnetic steel sheet (4) A notch groove (6) is provided in a through groove on one side of the surface of the magnetic steel sheet (4); a connecting magnetic tile (7) is movably connected in the notch groove (6) on one side of the magnetic steel sheet (4); both sides of the connecting magnetic tile (7) are provided with an outer protrusion (701); an extension portion (702) is provided on one side of the connecting magnetic tile (7) close to the outer protrusion (701); the extension portions (702) on both sides of the magnetic tile (7) extend to the top of the shaft hole (3); and the outer protrusion (701) on the surface of the magnetic tile (7) is movably overlapped with the notch groove (6).

2. The permanent magnet speed regulating motor magnetic steel assembly according to claim 1 is characterized in that: The magnetic steel sheet (4) is fixedly connected to the positioning plate (1) by bolts. The number of the magnetic steel sheets (4) is several and they are evenly distributed in the form of a transverse array. Locking nuts (8) are fixedly installed on the surfaces of the extensions (702) at both ends of the magnetic tile (7). One end of the locking nut (8) passes through one side of the magnetic tile (7) and is fixedly connected to the positioning plate (1).

3. The permanent magnet speed regulating motor magnetic steel assembly according to claim 1 is characterized in that: The number of the weight-reducing holes (2) is several and they are evenly distributed in annular form on the surface of the magnetic steel sheet (4); the outer arc surfaces of several of the magnetic steel sheets (4) are movably sleeved with a stator core (9); and a hollow groove (10) is provided on one side surface of the stator core (9).

4. The permanent magnet speed regulating motor magnetic steel assembly according to claim 3 is characterized in that: The number of the hollow slots (10) is several and they are evenly distributed in the form of a ring array. The hollow slots (10) are opened in the middle of each stator core (9), and one side surface of the stator core (9) is a hollow through structure.

5. The permanent magnet speed regulating motor magnetic steel assembly according to claim 4 is characterized in that: The hollow structure on one side of the stator core (9) is connected to the magnetic steel sheet (4), the inner arc surfaces of the two hollow slots (10) are cross-connected with the stator winding (11), and the outer arc surfaces of the stator winding (11) respectively penetrate to one side and the other side of the two hollow slots (10).

6. The permanent magnet speed regulating motor magnetic steel assembly according to claim 2 is characterized in that: The number of the magnetic tiles (7) is two, and they are distributed on the inner top and inner bottom of the through hole of the magnetic steel sheet (4) in a mirror-symmetrical manner.

7. The permanent magnet speed regulating motor magnetic steel assembly according to claim 6 is characterized in that: The outer protrusion (701) on the surface of the magnetic tile (7) overlaps and fits with a plurality of the magnetic steel sheets (4), and the surface of the axial hole (3) on one side of the positioning plate (1) is fixedly connected to the extension (702) at one end of the magnetic tile (7).

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