Permanent magnet auxiliary reluctance motor rotor structure

Abstract

The utility model discloses a rotor structure of a permanent magnet auxiliary reluctance motor, which comprises a rotor punching sheet, a plurality of magnetic steel groove groups are fixedly arranged on the rotor punching sheet, each magnetic steel groove group consists of a plurality of layers of magnetic steel grooves, corresponding magnetic steel bodies are arranged in the magnetic steel grooves, the magnetic steel bodies are rectangular, and the magnetic steel bodies are rectangular. The rotor punching sheet is used for a permanent magnet auxiliary reluctance motor with the rotor punching sheet, the motor is provided with a multilayer magnetic steel structure, large reluctance torque can be obtained, for a rotor with N layers of magnetic steel grooves, the types of magnetic steel can be reduced from 2N-1 to N, 2 or 1, the types of magnetic steel can be reduced, and the purchase, production and management costs of the motor can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of motor rotors, in particular to a permanent magnet assisted reluctance motor rotor structure. Background Art

[0002] The permanent magnet assisted reluctance motor is a type of motor that combines the characteristics of the permanent magnet synchronous motor and the synchronous reluctance motor. It can fully utilize the permanent magnet torque and reluctance torque to obtain high torque density while having good weak magnetic properties. It is suitable for applications with a wide speed regulation range. It also has the characteristics of low magnetic steel consumption and can use cheaper ferrite instead of neodymium iron boron to achieve higher cost performance and greater cost advantage. Therefore, the permanent magnet assisted reluctance motor has received widespread attention in many fields. Utility Model Content

[0003] The main purpose of the utility model is to provide a permanent magnet assisted reluctance motor rotor structure.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A permanent magnet assisted reluctance motor rotor structure comprises a rotor punching sheet, on which a plurality of magnetic steel slot groups are fixedly provided, the magnetic steel slot groups are composed of a plurality of layers of magnetic steel slots, each of the magnetic steel slots is provided with a corresponding magnetic steel body, and the magnetic steel body is rectangular.

[0006] Furthermore, the magnetic steel slot group on the rotor punching includes a magnetic steel body arranged in the magnetic steel slot, and is distributed in an array with the central axis of the rotor punching as the center of the circle.

[0007] Furthermore, the outermost layer of the rotor punching has one magnetic steel slot, and the structure of the magnetic steel slot is a semi-enclosed structure. Except for the outermost magnetic steel slot, the remaining layers of the rotor punching have three magnetic steel slots to form a semi-enclosed structure, and a magnetic steel body is installed in each magnetic steel slot.

[0008] Furthermore, the outermost magnetic steel slots on the rotor punching sheets and the magnetic steel bodies therein are arranged parallel to the magnetic steel slots and magnetic steel bodies in the middle of the remaining magnetic steel slot layers, and the magnetic steel slots and magnetic steel bodies on the corresponding two sides are arranged symmetrically with respect to the center lines of the middle magnetic steel slots and the magnetic steel bodies.

[0009] Furthermore, the number of magnetic steel slot layers of the magnetic steel slot group is not less than three.

[0010] Furthermore, each layer of magnetic steel slots in the magnetic steel slot group gradually expands from the outside of the rotor punching to the center of the rotor punching, the outermost layer of magnetic steel slots has only one magnetic steel body, and the remaining layers of magnetic steel slots are each provided with three magnetic steel bodies.

[0011] Furthermore, the size of the magnetic steel body provided in the magnetic steel groove is gradually enlarged corresponding to the size of the magnetic steel groove, and the size of the magnetic steel body in each layer of the magnetic steel groove is the same.

[0012] Furthermore, the magnetic steel bodies arranged in the magnetic steel slots have the same size, and the magnetic steel slots only gradually expand in length, while their widths remain unchanged.

[0013] Furthermore, except for the magnetic steel slots and magnetic steel bodies of the outermost magnetic steel slot layer, the widths of the magnetic steel slots of the remaining layers remain unchanged and the lengths are gradually increased, and the sizes of the magnetic steel bodies therein are the same.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The permanent magnet assisted reluctance motor with the rotor punching has a multi-layer magnetic steel structure and can obtain a larger reluctance torque; each layer of magnetic steel has the same size and specification. For a rotor with N layers of magnetic steel slots, the types of magnetic steel can be reduced from (2N-1) to N, 2 or 1, which can reduce the types of magnetic steel and reduce the purchase, production and management costs of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the rotor punching sheet of the utility model;

[0017] Figure 2 It is a top view of the magnetic steel slot group in Example 1 of the utility model;

[0018] Figure 3 A top view of a magnetic steel slot group in Example 2 of the present utility model;

[0019] Figure 4 It is a top view of the magnetic steel slot group in Example 3 of the utility model.

[0020] Reference numerals

[0021] 1. Rotor punching; 2. Magnetic steel slot group; 3. Magnetic steel slot; 4. Magnetic steel body. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0023] Example 1

[0024] See also Figure 1-2As shown, a permanent magnet assisted reluctance motor rotor structure includes a rotor punching 1, on which a plurality of groups of magnetic steel slot groups 2 are fixedly arranged in an array with the central axis of the rotor punching 1 as the center, the magnetic steel slot group 2 is composed of a plurality of layers of magnetic steel slots 3, the number of layers of magnetic steel slots 3 of the magnetic steel slot group 2 is not less than three, the outermost magnetic steel slot 3 of the rotor punching 1 is one, and the structure of the magnetic steel slot 3 is a semi-enclosed structure toward the edge of the rotor punching 1, the magnetic steel slots 3 of the remaining layers of the rotor punching 1 except the outermost magnetic steel slot 3 are formed by three magnetic steel slot groups 2 to form a semi-enclosed structure in the same direction as the first layer of magnetic steel slots 3, each magnetic steel slot 3 is installed with a magnetic steel body 4, the magnetic steel slot 3 is provided with a corresponding magnetic steel body 4, and the magnetic steel body 4 is rectangular.

[0025] The outermost magnetic steel slots 3 on the rotor punching sheet 1 and the magnetic steel body 4 therein are arranged parallel to the magnetic steel slots 3 and the magnetic steel body 4 in the middle of the remaining magnetic steel slots 3 layers, and the magnetic steel slots 3 and the magnetic steel body 4 on the corresponding two sides are arranged symmetrically with respect to the center line of the middle magnetic steel slot 3 and the magnet.

[0026] Each layer of the magnetic steel slots 3 of the magnetic steel slot group 2 is gradually enlarged from the outer side of the rotor punching 1 to the center of the rotor punching 1, and the magnetic steel body 4 provided in the magnetic steel slot 3 is also gradually enlarged corresponding to the size of the magnetic steel slot 3.

[0027] Example 2

[0028] See also Figure 1 and 3 As shown,

[0029] A permanent magnet assisted reluctance motor rotor structure comprises a rotor punching 1, on which a plurality of groups of magnetic steel slot groups 2 are fixedly arranged in an array with the central axis of the rotor punching 1 as the center, the magnetic steel slot group 2 is composed of a plurality of layers of magnetic steel slot groups 2, the number of layers of magnetic steel slots 3 of the magnetic steel slot group 2 is not less than three, the outermost magnetic steel slot 3 of the rotor punching 1 is one, and the structure of the magnetic steel slot 3 is a semi-enclosed structure toward the edge of the rotor punching 1, the magnetic steel slots 3 of the remaining layers of the rotor punching 1 except the outermost magnetic steel slot 3 are formed by three magnetic steel slot groups 2 to form a semi-enclosed structure in the same direction as the first layer of magnetic steel slots 3, each magnetic steel slot 3 is installed with a magnetic steel body 4, the magnetic steel slot 3 is provided with a corresponding magnetic steel body 4, and the magnetic steel body 4 is rectangular.

[0030] The outermost magnetic steel slots 3 on the rotor punching sheet 1 and the magnetic steel body 4 therein are arranged parallel to the magnetic steel slots 3 and the magnetic steel body 4 in the middle of the remaining magnetic steel slots 3 layers, and the magnetic steel slots 3 and the magnetic steel body 4 on the corresponding two sides are arranged symmetrically with respect to the center line of the middle magnetic steel slot 3 and the magnet.

[0031] Each layer of the magnetic steel slots 3 of the magnetic steel slot group 2 is gradually expanded from the outside of the rotor punching 1 to the center of the rotor punching 1, and the magnetic steel bodies 4 arranged in the magnetic steel slots 3 are of the same size, and the magnetic steel slots 3 are only expanded in length, and their widths remain unchanged.

[0032] Example 3

[0033] See also Figure 1 and 4 As shown, a permanent magnet assisted reluctance motor rotor structure includes a rotor punching 1, on which a plurality of groups of magnetic steel slot groups 2 are fixedly arranged in an array with the central axis of the rotor punching 1 as the center, the magnetic steel slot group 2 is composed of a plurality of layers of magnetic steel slot groups 2, the number of layers of magnetic steel slots 3 of the magnetic steel slot group 2 is not less than three, the outermost magnetic steel slot 3 of the rotor punching 1 is one, and the structure of the magnetic steel slot 3 is a semi-enclosed structure toward the edge of the rotor punching 1, the magnetic steel slots 3 of the remaining layers of the rotor punching 1 except the outermost magnetic steel slot 3 are formed by three magnetic steel slot groups 2 to form a semi-enclosed structure in the same direction as the first layer of magnetic steel slots 3, each magnetic steel slot 3 is installed with a magnetic steel body 4, the magnetic steel slot 3 is provided with a corresponding magnetic steel body 4, and the magnetic steel body 4 is rectangular.

[0034] The outermost magnetic steel slots 3 on the rotor punching sheet 1 and the magnetic steel body 4 therein are arranged parallel to the magnetic steel slots 3 and the magnetic steel body 4 in the middle of the remaining magnetic steel slots 3 layers, and the magnetic steel slots 3 and the magnetic steel body 4 on the corresponding two sides are arranged symmetrically with respect to the center line of the middle magnetic steel slot 3 and the magnet.

[0035] Except for the outermost layer of magnetic steel slots 3, the magnetic steel bodies 4 provided in the magnetic steel slots 3 are gradually expanded from the outer side of the rotor punching 1 to the center of the rotor punching 1, and the width of each layer of the magnetic steel slots 3 remains unchanged, only the length is expanded, and the sizes of the magnetic steel bodies 4 provided therein are the same.

[0036] It should be noted that the magnetic steel body can also be adjusted according to the size of the magnetic steel slot, but the size of the magnetic steel body in each layer of magnetic steel slot is the same.

[0037] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A permanent magnet assisted reluctance motor rotor structure, characterized in that: The invention comprises a rotor punching (1), on which a plurality of groups of magnetic steel slot groups (2) are fixedly provided, the magnetic steel slot groups (2) are composed of a plurality of layers of magnetic steel slots (3), each of the magnetic steel slots (3) is provided with a corresponding magnetic steel body (4), and the magnetic steel body (4) is rectangular.

2. A permanent magnet assisted reluctance motor rotor structure according to claim 1, characterized in that: The magnetic steel slot group (2) on the rotor punching sheet (1) comprises a magnetic steel body (4) arranged in the magnetic steel slot (3) and distributed in an array with the central axis of the rotor punching sheet (1) as the center.

3. The permanent magnet assisted reluctance motor rotor structure according to claim 1, characterized in that: The outermost magnetic steel slot (3) of the rotor punching (1) is one, and the structure of the magnetic steel slot (3) is a semi-enclosed structure. Except for the outermost magnetic steel slot (3), the remaining magnetic steel slots (3) of the rotor punching (1) are formed into a semi-enclosed structure through three magnetic steel slot groups (2), and a magnetic steel body (4) is installed in each magnetic steel slot (3).

4. A permanent magnet assisted reluctance motor rotor structure according to claim 3, characterized in that: The outermost magnetic steel slots (3) on the rotor punching sheet (1) and the magnetic steel bodies (4) therein are arranged parallel to the magnetic steel slots (3) and the magnetic steel bodies (4) in the middle of the remaining magnetic steel slots (3) layers, and the magnetic steel slots (3) and the magnetic steel bodies (4) on the corresponding two sides are arranged symmetrically with respect to the center line of the middle magnetic steel slot (3) and the magnetic steel body (4).

5. The permanent magnet assisted reluctance motor rotor structure according to claim 1, characterized in that: The number of layers of the magnetic steel slots (3) of the magnetic steel slot group (2) is not less than three.

6. A permanent magnet assisted reluctance motor rotor structure according to any one of claims 1 to 4, characterized in that: Each layer of magnetic steel slots (3) of the magnetic steel slot group (2) gradually expands from the outer side of the rotor punching sheet (1) toward the center of the rotor punching sheet (1), the outermost layer of magnetic steel slots (3) has only one magnetic steel body (4), and the remaining layers of magnetic steel slots (3) are each provided with three magnetic steel bodies (4).

7. A permanent magnet assisted reluctance motor rotor structure according to claim 6, characterized in that: The size of the magnetic steel bodies (4) provided in the magnetic steel grooves (3) is gradually enlarged corresponding to the size of the magnetic steel grooves (3), and the size of the magnetic steel bodies (4) in each layer of magnetic steel grooves (3) is the same.

8. The permanent magnet assisted reluctance motor rotor structure according to claim 6, characterized in that: The magnetic steel bodies (4) arranged in the magnetic steel slots (3) have the same size, and the magnetic steel slots (3) only gradually increase in length, while their width remains unchanged.

9. The permanent magnet assisted reluctance motor rotor structure according to claim 6, characterized in that: The magnetic steel slots (3) and the magnetic steel bodies (4) arranged therein, except for the magnetic steel slots (3) and the magnetic steel bodies (4) of the outermost magnetic steel slot (3) layer, have the same width and are only gradually enlarged in length, and the magnetic steel bodies (4) arranged therein are of the same size.

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