CN219322165U

CN219322165U - Low inertia rotor core structure for brushless control motor

Info

Publication number: CN219322165U
Application number: CN202223497490.XU
Authority: CN
Inventors: 杨恒亮
Original assignee: Nedco Kaiyu Automotive Appliances Jiangsu Co ltd
Current assignee: Nedco Kaiyu Automotive Appliances Jiangsu Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-07-07
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses a low inertia rotor core structure for a brushless control motor, which comprises a plurality of rotor punching sheets stacked into a whole; the rotor punching sheet is in a regular polygon shape, a central hole is formed in the center of the rotor punching sheet, a plurality of lightening holes corresponding to the number of edges of the rotor punching sheet are uniformly distributed on the rotor punching sheet around the central hole, the width of each lightening hole gradually increases from the position close to the central hole to the direction away from the central hole, stress spokes are formed between two adjacent lightening holes, the width of the stress spoke at the position close to the central hole is larger than the width of the stress spoke at the position away from the central hole, and a positioning hole is further formed in the edge of each lightening hole away from the central hole. According to the utility model, the structure of the rotor is optimized, and the weight of the rotor is reduced on the premise of ensuring the structural strength, so that the quick response capability of the motor is improved.

Description

Low inertia rotor core structure for brushless control motor

Technical Field

The utility model relates to the technical field of brushless motors, in particular to a low-inertia rotor core structure for a brushless control motor.

Background

Brushless motors are widely applied to the field of new energy automobiles due to the advantages of simple structure, small volume, high response speed, low cost, reliable operation and the like. The quick response of the motor reflects the control capability of the motor, but some occasions put forward higher requirements on the quick response of the motor, so that the rotor core structure adopted by the current motor cannot effectively reduce the rotational inertia of the motor, and the response capability of the motor is not rapid enough and cannot meet the higher requirements of new trends.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing a low inertia rotor core structure for a brushless control motor, which improves the quick response capability of the motor by optimizing the structure of a rotor and reducing the weight of the rotor.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a low inertia rotor core structure for brushless control motor includes a plurality of rotor punching sheets stacked into a whole; the rotor punching sheet is in a regular polygon shape, a central hole is formed in the center of the rotor punching sheet, a plurality of lightening holes corresponding to the number of edges of the rotor punching sheet are uniformly distributed on the rotor punching sheet around the central hole, the width of each lightening hole gradually increases from the position close to the central hole to the direction away from the central hole, stress spokes are formed between two adjacent lightening holes, the width of the stress spoke at the position close to the central hole is larger than the width of the stress spoke at the position away from the central hole, and a positioning hole is further formed in the edge of each lightening hole away from the central hole.

Further, a plurality of rivets are formed on each rotor punching sheet, and the rotor punching sheets are stacked into a whole through rivet alignment.

Further, the rotor punching sheet is regular decagon.

Further, clamping notches are formed in the corners of the rotor punching sheet.

By adopting the technical scheme, the utility model has the following beneficial effects:

according to the utility model, the regular polygon rotor punching sheets are provided with uniformly distributed weight reducing holes, and the aim of reducing the moment of inertia is achieved by reducing the weight of the rotor under the condition that the diameter of the rotor is unchanged, so that the quick response capability of the motor is improved. Meanwhile, the width shape of the lightening holes is designed to be adaptive to the shape of the rotor punching sheet, stress spokes are designed to be formed between two adjacent lightening holes, the width of the stress spokes close to the center hole is larger than that of the stress spokes far away from the center hole, and further the strength of the rotor punching sheet and the magnetic circuit of the motor can be effectively ensured.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the structure of a single rotor sheet of the present utility model;

FIG. 3 is a front view of a single rotor plate of the present utility model;

1, rotor punching sheets; 10. a central bore; 2. a lightening hole; 3. a stress spoke; 4. positioning holes; 5. riveting; 6. a notch.

Detailed Description

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

As shown in fig. 1 to 3, in the present embodiment, a low inertia rotor core structure for a brushless control motor is provided, which is composed of a plurality of rotor sheets 1, each rotor sheet 1 is provided with a plurality of circular rivets 5 formed thereon, and the plurality of rotor sheets 1 are butt-spliced and stacked together by the rivets 5, thereby forming the whole rotor core structure. Specifically, each rotor punching sheet 1 is preferably in a regular decagon shape, and the center of each rotor punching sheet 1 is provided with a center hole 10 so as to be convenient to be installed in the motor after being stacked. Meanwhile, ten lightening holes 2 are uniformly distributed on each rotor punching sheet 1 around the central hole 10, the positions of the ten lightening holes 2 are in one-to-one correspondence with the number of sides of the rotor punching sheet 1, the width of the lightening holes 2 gradually increases from the position close to the central hole 10 to the direction far away from the central hole 10, the shape of the whole shape of the rotor punching sheet 1 is met, and the strength of the whole rotor core structure is not influenced. In addition, stress spokes 3 are formed between two adjacent lightening holes 2, and the width of each stress spoke 3 at the position close to the central hole 10 is larger than that at the position far from the central hole 10, so that the working strength of each rotor punching sheet 1 is enhanced, and the running strength of the whole rotor core structure is further ensured.

In order to ensure the consistency of the press-fitting of the products, the embodiment is further provided with positioning holes 4 on the edge of each lightening hole 2 far away from the central hole 10, so as to facilitate the press-fitting of the product structure. In addition, clamping notches 6 are formed in the corners of the rotor punching sheet 1, so that the rotor punching sheet can be conveniently assembled and clamped with magnetic steel and cage-type injection molding shell pieces, and the installation stability of the whole rotor core structure is guaranteed.

Referring to fig. 1 to 3, the design principle of the present embodiment is that according to the formula t=jω, T is the torque output by the motor, J is the moment of inertia of the motor, ω is the angular acceleration of the motor; when the output torque of the motor is unchanged, the angular acceleration of the motor can be improved by reducing the rotational inertia of the motor, and then the quick response capability of the motor is improved. In this embodiment, the regular decagon rotor punching sheet 1 is provided with uniformly distributed weight reducing holes 2, so that the purpose of reducing the moment of inertia is achieved by reducing the weight of the rotor under the condition that the diameter of the rotor is unchanged, and the quick response capability of the motor is improved. Meanwhile, in order not to influence the structural strength of the rotor punching sheet 1, the structure of the rotor punching sheet 1 needs to be optimized, the width shape of the lightening holes 2 is designed to be adaptive to the self shape of the rotor punching sheet 1, stress spokes 3 are designed to be formed between two adjacent lightening holes 2, the width of the stress spokes 3 close to the center hole 10 is larger than that of the stress spokes far away from the center hole 10, the strength of the rotor punching sheet 1 and a motor magnetic circuit can be effectively ensured, and materials of an iron core can be removed in a large area under the premise that the structural strength of the rotor iron core is not influenced, so that the weight of the iron core is reduced, the rotational inertia of a rotor is changed, the angular speed of a motor is improved, and the rapid response capability meeting the requirements is achieved.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The technical problems, technical solutions and beneficial effects that the present utility model solves are further described in detail in the above specific embodiments, it should be understood that the above description is only specific embodiments of the present utility model and is not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. that fall within the spirit and principles of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. The utility model provides a brushless control motor is with low inertia rotor core structure which characterized in that: comprises a plurality of rotor punching sheets (1) which are stacked into a whole;

the rotor punching sheet (1) is regular polygon and the center is provided with a center hole (10), a plurality of lightening holes (2) corresponding to the number of edges of the rotor punching sheet (1) are uniformly distributed on the rotor punching sheet (1) around the center hole (10), the width of each lightening hole (2) gradually increases from the position close to the center hole (10) to the direction away from the center hole (10), stress spokes (3) are formed between two adjacent lightening holes (2), the width of the stress spokes (3) close to the center hole (10) is larger than the width of the position away from the center hole (10), and positioning holes (4) are further formed in the edges of each lightening hole (2) away from the center hole (10).

2. The low inertia rotor core structure for a brushless control motor according to claim 1, wherein: and a plurality of rivets (5) are formed on each rotor punching sheet (1), and the rotor punching sheets (1) are aligned and stacked into a whole through the rivets (5).

3. The low inertia rotor core structure for a brushless control motor according to claim 2, wherein: the rotor punching sheet (1) is in a regular decagon shape.

4. A low inertia rotor core structure for a brushless control motor according to claim 3, wherein: and clamping notches (6) are formed in each corner of the rotor punching sheet (1).