Rotor punching sheet of permanent magnet motor

Abstract

The utility model discloses a rotor punching sheet of a permanent magnet motor, which relates to the technical field of rotor punching sheets and comprises a rotor punching sheet body. Wherein the rotor punching sheet main body is formed by sequentially splicing and combining a plurality of groups of fan-shaped punching sheet structures in the circumferential direction of a rotor shaft; the fan-shaped punching sheet structure is provided with two groups of rectangular first magnetic steel grooves for penetration of magnetic steel. The fan-shaped punching sheet structure is provided with a second magnetic steel groove arranged at one side of the first magnetic steel groove, and the second magnetic steel groove is perpendicular to the end face of the fan-shaped punching sheet structure. The plurality of groups of fan-shaped punching sheet structures are spliced and combined with the rotor punching sheet main body, the plurality of groups of first magnetic steel grooves and the plurality of groups of second magnetic steel grooves, so that the arrangement space of the magnetic steel is optimized, the heat dissipation uniformity is further improved, the geometric shapes of the stator and the rotor are optimized, the space utilization rate in the permanent magnet motor is improved, the permanent magnet motor is not easy to demagnetize under high load, and the service life of the permanent magnet motor is prolonged. And the uniformity and efficiency of the magnetic field are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rotor lamination technology field, specifically is permanent magnet motor rotor lamination. BACKGROUND

[0002] Permanent magnet motor as a kind of efficient, energy-saving motor type, it has been widely applied in modern industry and daily life, it gradually replaces the application scene of many traditional motors with unique performance advantage, permanent magnet motor is a kind of synchronous motor using permanent magnet to generate magnetic field, the rotational speed of its rotor is consistent with the current frequency of stator winding, permanent magnet motor relies on the magnetic field generated by permanent magnet and electromagnetic field generated by stator winding interaction, realizes the conversion of electric energy and mechanical energy, permanent magnet motor rotor lamination is the key component in motor rotor structure, its design and manufacture directly affect the operating performance and reliability of motor, permanent magnet motor rotor lamination is usually formed by the superposition of multiple single lamination, to form a complete rotor core.

[0003] The existing permanent magnet motor rotor lamination has certain drawbacks when in use, the existing permanent magnet motor rotor lamination when in use, since permanent magnet motor provides magnetic field. Rotor as the core component of motor, its performance determines the power of motor, and the space utilization rate of high-power permanent magnet motor is low when in use, adjustable space is small and motor heat dissipation problem occurs, which can not meet people's needs. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the technical problems existing in prior art, and for this purpose, the utility model provides permanent magnet motor rotor lamination.

[0005] Permanent magnet motor rotor lamination is applied to permanent magnet motor rotor shaft, and includes: rotor lamination main body detachably installed on permanent magnet motor rotor shaft;Wherein, the rotor lamination main body is formed by the circumferential sequential splicing combination of several groups of fan-shaped lamination structures;The fan-shaped lamination structure is provided with two groups of rectangular first magnetic steel grooves for magnetic steel to pass through;The fan-shaped lamination structure is provided with second magnetic steel groove arranged at the side of first magnetic steel groove, and the second magnetic steel groove is perpendicular to the end face of fan-shaped lamination structure, and the first magnetic steel groove and the second magnetic steel groove are evenly distributed along the circumference of rotor lamination main body, which optimizes the setting space of magnetic steel and further improves the uniformity of heat dissipation.

[0006] As a further scheme of the utility model, the first magnetic steel groove is in the shape of a Chinese character "yi", and the hole length direction of the two groups of first magnetic steel grooves is perpendicular to the symmetry plane of the fan-shaped lamination structure.

[0007] As a further scheme of the utility model: the first magnetic steel groove is provided with a first convex groove part in an L shape structure at one end close to the symmetrical face of the fan-shaped punching sheet structure, and the other end of the first magnetic steel groove is provided with a second convex groove part in an inclined manner, the first convex groove part and the second convex groove part facilitate the installation of the magnetic steel, and the overall structural stability of the magnetic steel groove is enhanced, which helps to reduce the vibration and noise generated due to high-speed rotation.

[0008] As a further scheme of the utility model: the second magnetic steel groove is in a V shape structure, and the second magnetic steel groove is composed of two groups of inclined and symmetrical strip-shaped grooves.

[0009] As a further scheme of the utility model: the strip-shaped groove comprises a first magnetic groove close to the symmetrical face of the fan-shaped punching sheet structure and a second magnetic groove arranged in alignment with the first magnetic groove, and one end of the second magnetic groove is opened to the edge of the rotor punching sheet body.

[0010] As a further scheme of the utility model: one end of the first magnetic groove and the end of the second magnetic groove close to the first magnetic groove are symmetrically provided with a first recess part, and one end of the first magnetic groove close to the symmetrical face of the fan-shaped punching sheet structure is provided with a second recess part, the first recess part and the second recess part cooperate to help balance the stress distribution on both sides of the magnetic steel groove, reduce deformation and damage caused by temperature change or mechanical stress, and also promote heat dissipation from the magnetic steel groove, improve the overall thermal management performance of the rotor, and prolong the service life of the motor.

[0011] As a further scheme of the utility model: the rotor punching sheet body is made of neodymium iron boron material, and the neodymium iron boron has super strong magnetism and can meet the high efficiency requirement of the permanent magnet motor.

[0012] As a further scheme of the utility model: a rotor shaft hole is opened at the center of the rotor punching sheet body, and the rotor shaft hole is convenient for fixing with the rotor shaft of the permanent magnet motor.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) the utility model is provided with a rotor punching sheet body, a plurality of groups of fan-shaped punching sheet structures are spliced to combine the rotor punching sheet body, and a plurality of groups of first magnetic steel grooves and second magnetic steel grooves optimize the setting space of the magnetic steel, further improve the uniformity of heat dissipation, optimize the geometric shape of the stator and the rotor, improve the space utilization rate inside the permanent magnet motor, ensure that the permanent magnet motor is not prone to demagnetization under high load, and ensure the uniformity and efficiency of the magnetic field. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall schematic view of the utility model.

[0016] Figure 2The utility model discloses a rotor punching piece main body's partial structure diagram.

[0017] In the drawing: 1, rotor punching piece main body;2, fan punching piece structure;3, first magnetic steel groove;4, second magnetic steel groove;5, first convex groove part;6, second convex groove part;7, first magnetic groove;8, second magnetic groove;9, first concave groove part;10, second concave groove part;11, rotor shaft hole. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be described below in clear and complete manner in connection with the embodiments, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0019] Embodiment one

[0020] Please refer to Figure 1 - Figure 2 The application provides a rotor punching piece of a permanent magnet motor, which is applied to a rotor shaft of the permanent magnet motor and comprises a rotor punching piece main body 1 which is detachably installed on the rotor shaft of the permanent magnet motor;The rotor punching piece main body 1 is composed of a plurality of groups of fan punching piece structures 2 which are sequentially spliced and combined around the rotor shaft in the circumferential direction;Two groups of first magnetic steel grooves 3 are formed in the fan punching piece structure 2 and are used for penetrating magnetic steel;The second magnetic steel groove 4 is formed in one side of the first magnetic steel groove 3 of the fan punching piece structure 2, the second magnetic steel groove 4 is perpendicular to the end face of the fan punching piece structure 2, the plurality of groups of first magnetic steel grooves 3 and the plurality of groups of second magnetic steel grooves 4 are evenly distributed along the circumferential direction of the rotor punching piece main body 1, the setting space of the magnetic steel is optimized, the uniformity of heat dissipation is further improved, the simulation of the motor magnetic circuit is carried out by using finite element analysis software, the geometric shape of the stator and the rotor is optimized, and the uniformity and efficiency of the magnetic field are ensured.

[0021] The first magnetic steel groove 3 is in the shape of a Chinese character "yi", and the length direction of the hole type of the two groups of first magnetic steel grooves 3 is perpendicular to the symmetry plane of the fan punching piece structure 2.

[0022] One end of the first magnetic steel groove 3 close to the symmetry plane of the fan punching piece structure 2 is provided with a first convex groove part 5 in the shape of an L-shaped structure, and the other end of the first magnetic steel groove 3 is provided with a second convex groove part 6 in an inclined manner, the first convex groove part 5 and the second convex groove part 6 facilitate the installation of the magnetic steel, and the overall structural stability of the magnetic steel groove is enhanced, which helps to reduce the vibration and noise generated by high-speed rotation.

[0023] The second magnetic steel groove 4 is in the shape of a Chinese character "V", and the second magnetic steel groove 4 is composed of two groups of inclined and symmetrical strip grooves.

[0024] The bar-shaped slot comprises a first magnetic slot 7 close to the symmetry plane of the fan-shaped punching structure 2 and a second magnetic slot 8 arranged in alignment with the first magnetic slot 7, and one end of the second magnetic slot 8 is opened to the edge of the rotor punching body 1.

[0025] One end of the first magnetic slot 7 and one end of the second magnetic slot 8 close to the first magnetic slot 7 are symmetrically provided with a first recessed groove part 9, and one end of the first magnetic slot 7 close to the symmetry plane of the fan-shaped punching structure 2 is provided with a second recessed groove part 10, and the cooperation of the first recessed groove part 9 and the second recessed groove part 10 helps to balance the stress distribution on both sides of the magnetic steel slot, reduces the deformation and damage caused by temperature change or mechanical stress, and also promotes the heat dissipation from the magnetic steel slot, improves the overall thermal management performance of the rotor, and prolongs the service life of the motor.

[0026] The rotor punching body 1 is made of neodymium iron boron material, which has super strong magnetism and can meet the high efficiency requirements of the permanent magnet motor.

[0027] A rotor shaft hole 11 is opened at the center of the rotor punching body 1, which is convenient for fixing with the permanent magnet motor rotor shaft.

[0028] In summary, the first magnetic steel slot 3 and the second magnetic steel slot 4 are opened on the fan-shaped punching structure 2, a plurality of fan-shaped punching structure 2 groups are combined to form the rotor punching body 1, and the rotor punching body 1 is installed on the permanent magnet motor rotor shaft, so that a plurality of groups of magnetic steel are connected with the first magnetic steel slot 3 and the second magnetic steel slot 4, and a plurality of groups of first magnetic steel slots 3 and second magnetic steel slots 4 optimize the setting space of the magnetic steel, further improve the uniformity of heat dissipation, optimize the geometric shape of the stator and the rotor, and ensure that the permanent magnet motor is not easy to demagnetize under high load, and ensure the uniformity and efficiency of the magnetic field.

[0029] The above embodiments are only used to illustrate the technical method of the utility model and are not limited, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A permanent magnet motor rotor lamination, used in the rotor shaft of a permanent magnet motor, characterized in that, Comprising: A rotor punching main body (1) detachably mounted on the rotor shaft of a permanent magnet motor; Wherein, the rotor punching main body (1) is formed by sequentially splicing and combining a plurality of groups of sector punching structures (2) circumferentially around the rotor shaft; Two rectangular first magnet slots (3) for the magnetic steel to pass through are provided on the sector punching structure (2); A second magnet slot (4) is provided on the sector punching structure (2) on one side of the first magnet slot (3).

2. The permanent magnet motor rotor lamination according to claim 1, characterized in that, The first magnet slot (3) has a "one" - shaped structure, and the length direction of the hole shape of the two first magnet slots (3) is perpendicular to the symmetry plane of the sector punching structure (2).

3. The permanent magnet motor rotor lamination according to claim 1, characterized in that, A first convex groove portion (5) with an "L" - shaped structure is provided at one end of the first magnet slot (3) close to the symmetry plane of the sector punching structure (2), and a second convex groove portion (6) is obliquely provided at the other end of the first magnet slot (3).

4. The permanent magnet motor rotor lamination according to claim 3, characterized in that, The second magnet slot (4) has a "V" - shaped structure, and the second magnet slot (4) is composed of two symmetrically inclined strip - shaped grooves.

5. The permanent magnet motor rotor lamination according to claim 4, characterized in that, The strip - shaped groove includes a first magnetic groove (7) close to the symmetry plane of the sector punching structure (2) and a second magnetic groove (8) aligned with the first magnetic groove (7), and one end of the second magnetic groove (8) is opened to the edge of the rotor punching main body (1).

6. The permanent magnet motor rotor lamination according to claim 5, characterized in that, First groove portions (9) are symmetrically opened at one end of the first magnetic groove (7) and at one end of the second magnetic groove (8) close to the first magnetic groove (7), and a second groove portion (10) is opened at one end of the first magnetic groove (7) close to the symmetry plane of the sector punching structure (2).

7. The permanent magnet motor rotor lamination according to claim 1, characterized in that, The rotor punching main body (1) is made of neodymium iron boron material.

8. The permanent magnet motor rotor lamination according to claim 1, characterized in that, A rotor shaft hole (11) is opened at the center of the rotor punching main body (1).

Images