Permanent magnet synchronous high-speed motor

Abstract

The utility model discloses a permanent magnet synchronous high-speed motor, which comprises a rotating shaft, a rotor, a stator, an electromagnetic winding and a casing, the stator is fixed on the inner side wall of the casing, the rotor is fixed on the rotating shaft, and a radial air gap is formed between the rotor and the stator; the outer circumference of the rotor is provided with a plurality of first magnetic steel grooves and second magnetic steel grooves which are distributed in a V shape. The first magnetic steel grooves and the second magnetic steel grooves are symmetrically arranged with the central symmetry plane of the rotor as the symmetry axis. A plurality of stator salient poles which are uniformly distributed at equal intervals are arranged on the inner ring of the stator; and electromagnetic windings are wound on the stator salient poles. According to the permanent magnet synchronous motor, the first magnetic steel grooves and the second magnetic steel grooves are formed in the outer circumference of the rotor, proper N-pole and S-pole magnetic steel is inserted, and the magnetic isolation air gap holes are formed, so that uniform distribution of a magnetic field is realized, and the running efficiency and the stability of the motor are improved and the normal work of the permanent magnet synchronous motor is ensured through mutual matching with a stator magnetic field.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a permanent magnet synchronous high-speed motor. Background Art

[0002] A permanent magnet synchronous motor consists of a rotor and a stator. In the prior art, the rotor is usually composed of a magnetizer and a permanent magnet. The magnetizer is usually made of a stack of stamped silicon steel sheets. When non-oriented silicon steel sheets are used, the magnetization depth of the magnetizer is not deep enough. When oriented silicon steel sheets are used, the magnetization of the magnetizer will be uneven due to the specific orientation of the silicon steel sheets. In addition, the magnetizer itself is non-magnetic, which results in a waste of rotor space for the magnetizer, resulting in insufficient utilization of the rotor space and an inability to maximize the magnetic flux of the rotor. Permanent magnets can be attached to the surface of the magnetizer or embedded inside the magnetizer. In order to obtain greater magnetism and magnetic flux, permanent magnets are usually made of rare earth materials, such as neodymium iron boron.

[0003] The magnetic field design of traditional permanent magnet synchronous motors is not sophisticated enough, and the magnetic field distribution is often uneven, which can easily lead to an imbalance of electromagnetic force inside the motor. This not only causes vibration and noise in the motor, but also causes fluctuations in the motor's output torque, reducing the motor's operating efficiency.

[0004] Based on the above situation, the utility model proposes a permanent magnet synchronous high-speed motor, which can effectively solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a permanent magnet synchronous high-speed motor. The utility model provides a permanent magnet synchronous high-speed motor that achieves a uniform magnetic field distribution by providing first and second magnetic steel slots on the outer circumference of the rotor, inserting appropriate N-pole and S-pole magnets, and providing magnetic isolation air gaps. This improves the operating efficiency and stability of the motor by cooperating with the stator magnetic field, ensuring the normal operation of the permanent magnet synchronous motor.

[0006] The utility model is achieved through the following technical solutions:

[0007] A permanent magnet synchronous high-speed motor comprises a rotating shaft, a rotor, a stator, an electromagnetic winding and a casing; the stator is fixed to the inner side wall of the casing, the rotor is fixed to the rotating shaft, and a radial air gap is defined between the rotor and the stator; the outer circumference of the rotor is provided with a plurality of first magnetic steel slots and second magnetic steel slots distributed in a V-shape, the first magnetic steel slots and the second magnetic steel slots being symmetrically arranged with the central symmetry plane of the rotor as the symmetry axis; the first magnetic steel slots and the second magnetic steel slots are both arc-shaped, and the concave surfaces of the first magnetic steel slots and the second magnetic steel slots are both arranged outward; the inner ring of the stator is provided with a plurality of stator salient poles uniformly distributed at equal intervals, and the stator salient poles are wound with electromagnetic windings.

[0008] According to the above technical solution, as a further preferred technical solution of the above technical solution, an N-pole magnetic steel is inserted into the first magnetic steel slot, and an S-pole magnetic steel is inserted into the second magnetic steel slot.

[0009] According to the above technical solution, as a further preferred technical solution of the above technical solution, the rotor is also provided with a plurality of circular weight-reducing holes, and the weight-reducing holes are distributed at equal angles on the periphery of the rotor shaft hole with the center line of the rotor center as the axis.

[0010] According to the above technical solution, as a further preferred technical solution of the above technical solution, a magnetic isolation air gap hole is provided between the first magnetic steel slot and the second magnetic steel slot, and the magnetic isolation air gap hole is an isosceles triangle.

[0011] According to the above technical solution, as a further preferred technical solution of the above technical solution, the outer wall of the rotating shaft is provided with a convex key, and the inner wall of the rotor shaft hole is provided with a keyway that cooperates with the convex key.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] The utility model provides a permanent magnet synchronous high-speed motor, which achieves uniform distribution of the magnetic field by arranging first and second magnetic steel slots on the outer circumference of the rotor, inserting suitable N-pole and S-pole magnetic steels, and providing magnetic isolation air gap holes. By cooperating with the stator magnetic field, the operating efficiency and stability of the motor are improved, ensuring the normal operation of the permanent magnet synchronous motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific embodiments. However, it should be understood that the drawings are for illustrative purposes only and are not to be construed as limiting this patent. To better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and are not to be construed as limiting this patent.

[0016] A permanent magnet synchronous high-speed motor comprises a rotating shaft 1, a rotor 2, a stator 3, an electromagnetic winding 4 and a casing 5; the stator 3 is fixed to the inner wall of the casing 5, the rotor 2 is fixed to the rotating shaft 1, and a radial air gap 6 is provided between the rotor 2 and the stator 3; the outer circumference of the rotor 2 is provided with a plurality of first magnetic steel slots 21 and second magnetic steel slots 22 distributed in a V-shape, and the first magnetic steel slots 21 and the second magnetic steel slots 22 are symmetrically arranged with the central symmetry plane of the rotor 2 as the symmetry axis; the first magnetic steel slots 21 and the second magnetic steel slots 22 are both arc-shaped, and the concave surfaces of the first magnetic steel slots 21 and the second magnetic steel slots 22 are both arranged outward; the inner ring of the stator 3 is provided with a plurality of stator salient poles 31 uniformly distributed at equal intervals, and the stator salient poles 31 are wound with electromagnetic windings 4.

[0017] Furthermore, in another embodiment, an N-pole magnetic steel 7 is inserted into the first magnetic steel slot 21 , and an S-pole magnetic steel 8 is inserted into the second magnetic steel slot 22 .

[0018] By inserting N-pole magnet 7 into the first magnet slot 21 and S-pole magnet 8 into the second magnet slot 22, the rotor can generate a stable and regular magnetic field, which cooperates with the stator magnetic field to improve the operating efficiency and stability of the motor and ensure the normal operation of the permanent magnet synchronous motor.

[0019] Furthermore, in another embodiment, the rotor 2 is further provided with a plurality of circular weight-reducing holes 23 , which are distributed at equal angles around the periphery of the rotor shaft hole 24 with the center line of the rotor 2 as the axis.

[0020] By providing the weight-reducing holes 23 , the weight of the rotor is reduced without affecting the rotor structural strength and motor performance, which is beneficial to the high-speed rotation of the motor, reduces the moment of inertia, and improves the response speed and operating efficiency of the motor.

[0021] Furthermore, in another embodiment, a magnetic isolation air gap hole 25 is provided between the first magnetic steel slot 21 and the second magnetic steel slot 22 , and the magnetic isolation air gap hole 25 is in the shape of an isosceles triangle.

[0022] By providing the magnetic isolation air gap holes 25, the magnetic interference between adjacent N-pole magnets 7 and S-pole magnets 8 can be effectively reduced, ensuring that the magnetic field generated by each magnet is independent and stable, thereby optimizing the magnetic field distribution of the rotor and improving the performance of the motor.

[0023] Furthermore, in another embodiment, a convex key 11 is provided on the outer wall of the rotating shaft 1 , and a key groove 26 is provided on the inner wall of the rotor shaft hole 24 to cooperate with the convex key 11 .

[0024] By providing the convex key 11 and the keyway 26 , it is ensured that the rotor can rotate stably following the rotating shaft 1 during the operation of the motor, thereby improving the stability and reliability of the motor operation.

[0025] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use a permanent magnet synchronous high-speed motor of the present invention, and can produce the positive effects described in the present invention.

[0026] Unless otherwise specified, in this utility model, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or positional relationships, they are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the utility model 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 operate in a specific orientation. Therefore, the terms describing the orientation or positional relationships in this utility model are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can understand the specific meanings of the above terms in conjunction with the accompanying drawings and according to specific circumstances.

[0027] Unless otherwise specified or limited, the terms "disposed," "connected," and "connected" in this utility model should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention falls within the scope of protection of the present invention.

Claims

1. A permanent magnet synchronous high-speed motor, characterized in that: The invention comprises a rotating shaft (1), a rotor (2), a stator (3), an electromagnetic winding (4) and a casing (5); the stator (3) is fixed on the inner wall of the casing (5), the rotor (2) is fixed on the rotating shaft (1), and a radial air gap (6) is provided between the rotor (2) and the stator (3); the outer circumference of the rotor (2) is provided with a plurality of first magnetic steel slots (21) and second magnetic steel slots (22) distributed in a V-shape, and the first magnetic steel slots (21) and the second magnetic steel slots (22) are symmetrically arranged with the central symmetry plane of the rotor (2) as the symmetry axis; the first magnetic steel slots (21) and the second magnetic steel slots (22) are both arc-shaped, and the concave surfaces of the first magnetic steel slots (21) and the second magnetic steel slots (22) are both arranged outward; the inner ring of the stator (3) is provided with a plurality of stator salient poles (31) uniformly distributed at equal intervals, and the stator salient poles (31) are wound with an electromagnetic winding (4).

2. A permanent magnet synchronous high-speed motor according to claim 1, characterized in that: An N-pole magnetic steel (7) is inserted into the first magnetic steel slot (21), and an S-pole magnetic steel (8) is inserted into the second magnetic steel slot (22).

3. The permanent magnet synchronous high-speed motor according to claim 1, characterized in that: The rotor (2) is further provided with a plurality of circular weight-reducing holes (23), wherein the weight-reducing holes (23) are distributed at equal angles on the periphery of the rotor shaft hole (24) with the center line of the center of the rotor (2) as the axis.

4. The permanent magnet synchronous high-speed motor according to claim 1, characterized in that: A magnetic isolation air gap hole (25) is provided between the first magnetic steel slot (21) and the second magnetic steel slot (22), and the magnetic isolation air gap hole (25) is in the shape of an isosceles triangle.

5. The permanent magnet synchronous high-speed motor according to claim 3, characterized in that: The outer wall of the rotating shaft (1) is provided with a convex key (11), and the inner wall of the rotor shaft hole (24) is provided with a key groove (26) that is matched with the convex key (11).

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