Automobile EVP motor with low cogging torque
By tilting and twisting 9° on the rotor core of the automotive EVP motor, the problem of large cog torque in existing motors is solved, and the effect of reducing torque fluctuations, vibrations and noise is achieved. The process is simple and suitable for batches. Production.
Patent Information
- Application Number
- CN202420084620.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-12
AI Technical Summary
In existing automotive EVP motors, the cogging torque is relatively large, which causes torque fluctuations, vibrations and noises when the motor is running. In small-size multi-slot motors, it is difficult to design auxiliary slots.
The cogging torque is reduced by opening several tooth grooves on the core of the motor rotor and tilting these tooth grooves by 9°.
It effectively reduces the cogging torque of the motor, reduces torque fluctuations, vibrations and noises, and has a simple process and low cost. It is suitable for mass production, and the angle of the cogging is easy to measure.
Smart Images
Figure CN222484399U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to an automotive EVP motor with low cogging torque. Background Art
[0002] The permanent magnet DC motor is mainly composed of a stator, a rotor, and an end cover. It relies on the magnetic field generated by the stator magnet as a medium to generate torque on the rotor winding. The stator housing and the rotor core are important components of the magnetic circuit. The rotor surface is distributed with slots, which makes the magnetic resistance different at different positions, causing periodic torque fluctuations during the operation of the motor, namely the cogging torque. The cogging torque not only increases the fluctuation of the motor torque, but is also one of the sources of motor vibration and noise. The motor parts used in automobiles generally require small cogging torque, and the same is true for the EVP motor used in the braking system. Therefore, reducing the cogging torque is an issue that needs to be paid attention to in motor design.
[0003] The main methods to reduce the motor cogging torque include opening auxiliary slots on the core surface, tilting the stator poles, tilting the rotor core slots, etc. For small-sized multi-slot motors, it is difficult to redesign the auxiliary slots. Tilting the stator poles and tilting the rotor core slots are relative, and the final effect is the same. However, in comparison, tilting the rotor core slots is easier to implement and mass produce than tilting the stator poles, and is easy to measure. However, different usage environments will have different requirements for the angle of the core slots.
[0004] Therefore, there is an urgent need to design an automotive EVP motor with low cogging torque to overcome the deficiencies of one or more of the above-mentioned prior arts. Summary of the invention
[0005] The technical solution adopted by the utility model to solve the above technical problems is: to provide an automotive EVP motor with low cogging torque, characterized in that it includes a motor body, a motor rotor is arranged in the motor body, the motor rotor has an iron core, the iron core is used for winding a wire group, a plurality of tooth slots are opened on the iron core, and a plurality of the tooth slots are twisted to one side, and the torsion angle of the tooth slots is 9°.
[0006] The beneficial effects of the utility model are: the tooth groove torque is reduced by twisting the tooth groove by 9°, and the torque is still within the allowable range of the product, the structure is simple to implement, the cost is low, batch production can be achieved, and the angle of the tooth groove is easy to measure. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a schematic diagram of the structure of the utility model;
[0008] Figure 2 It is a structural schematic diagram of the tooth groove of the utility model.
[0009] In the figure:
[0010] 10. Motor body; 11. Rotor; 12. Iron core; 13. Tooth slots. DETAILED DESCRIPTION
[0011] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0012] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.
[0013] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0014] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0015] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. Therefore, the utility model is not limited to the specific embodiments disclosed below.
[0016] like Figure 1-Figure 2 As shown, the utility model provides an automotive EVP motor with low cogging 13 torque, characterized in that it includes a motor body 10, wherein a motor rotor 11 is arranged in the motor body 10, and the motor rotor 11 has an iron core 12, wherein the iron core 12 is used for winding a wire group, and a plurality of tooth slots 13 are opened on the iron core 12, wherein the plurality of tooth slots 13 are twisted to one side, and the torsion angle of the tooth slots 13 is 9°; specifically, the present application combines the actual production process and product characteristics, and reduces the tooth slot 13 torque by tilting the rotor 11 tooth slots 13. Through software simulation and experimental testing, the expected effect can be achieved by reasonably designing the inclination angle of the tooth slots 13, wherein the angle of the tooth slots 13 is preferably 9°. Through this solution, the cogging torque of the motor can be reduced to an allowable range for the product, which is an effective solution to reduce the cogging torque, and the angle of the tooth slots 13 can be adjusted according to the needs of different products.
[0017] In summary, the utility model reduces the tooth groove torque by twisting the tooth groove by 9°, and the torque is still within the allowable range of the product. The structure is simple to implement, the cost is low, batch production can be achieved, and the angle of the tooth groove is easy to measure.
[0018] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.
Claims
1. A low cogging torque automotive EVP motor, characterized in that: The invention comprises a motor body, wherein a motor rotor is arranged in the motor body, wherein the motor rotor has an iron core, wherein the iron core is used for winding a coil group, and wherein a plurality of tooth slots are provided on the iron core, wherein the plurality of tooth slots are twisted to one side, and the twisting angle of the tooth slots is 9 degrees.