Rotor
By designing a rotor magnetic pole angle of 145°-150° and a limiting protrusion structure, the problem of magnetic flux saturation in the low-speed domain of the drive motor was solved, achieving stable operation and efficient energy conversion of the motor.
Patent Information
- Application Number
- CN202520293472.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing drive motors are prone to magnetic flux saturation in the low-speed range, which leads to significantly enhanced torque pulsation, resulting in problems such as uneven power output and nonlinear torque response jumps.
Design a rotor with a magnetic pole angle of 145°-150°, a magnetic pole ratio of 6:1, a small amount of magnets, ten magnetic poles evenly distributed on the rotor, a limiting protrusion to restrict the displacement of the magnets, and heat dissipation through a heat dissipation section to improve torque fluctuation and reduce vibration and noise.
It improves the smoothness of motor operation, reduces jerking, increases motor efficiency, reduces magnetic harmonic losses, and enhances the smoothness and response speed of power output.
Smart Images
Figure CN223758056U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to rotor technical field especially is rotor. BACKGROUND
[0002] The core power source of new energy automobile is drive motor, and the performance parameters of drive motor directly determine important indexes such as acceleration response, energy conversion efficiency, endurance capacity and dynamic control quality of whole vehicle. However, the current mainstream permanent magnet synchronous motor is limited by the design of stator and rotor assembly, and flux saturation phenomenon is prone to occur in low speed domain, which leads to significant enhancement of torque ripple, and leads to problems such as uneven power output and nonlinear jump of torque response. This kind of electromechanical coupling abnormal phenomenon seriously weakens the linear power output characteristics that new energy automobile electric technology should have, and it is urgent to carry out technical iteration through high-precision magnetic field oriented control algorithm and magnetic circuit topology optimization. SUMMARY
[0003] The utility model solves the technical problems that: in order to solve the existing drive motor in low speed domain flux saturation phenomenon is prone to occur, which leads to significant enhancement of torque ripple, and leads to problems such as uneven power output and nonlinear jump of torque response, and the utility model provides a rotor.
[0004] The utility model adopts the technical scheme that: a rotor, including rotor body, the rotor body is evenly distributed with ten magnetic poles along the circumferential direction thereof, each magnetic pole includes the magnetic slot set on the rotor and two magnetic steels set in the magnetic slot, the included angle formed between the two magnetic steels is X, and X is 145 °-150 °. Compared with the prior art, the included angle is set to 145 °-150 ° in the scheme, the magnetic steel consumption is as little as possible under the condition of meeting the torque requirement, and the magnetic pole ratio is designed to be six to one, ten magnetic poles are evenly distributed on the rotor, the torque fluctuation phenomenon is improved, vibration and noise are reduced, the motor runs more smoothly and stably, the jerk feeling is greatly reduced, magnetic harmonic loss is reduced, motor efficiency is improved, and acceleration response is fast.
[0005] In some preferred embodiments, the length L of each magnetic steel is 9.2 mm, and the width W of each magnetic steel is 3 mm.
[0006] In some preferred embodiments, the magnetic slot has two mounting sections matched with the magnetic steels, the magnetic slot is in communication between the two mounting sections and forms a first heat dissipation section, and the first heat dissipation section is provided with a first limiting protrusion for limiting the radial displacement of the magnetic steels between the mounting sections.
[0007] In order to dissipate the heat on the rotor, preferably some embodiments, the mounting section extends outwardly away from one end of the first heat dissipation section with a second heat dissipation section, the second heat dissipation section is provided with a second limiting protrusion between the mounting section for limiting the radial displacement of the magnetic steel.
[0008] The utility model discloses a rotor has the advantages that: the utility model relates to a rotor, which comprises a rotor body, a plurality of magnetic grooves and a plurality of magnetic steels, wherein the magnetic grooves are arranged on the rotor body, and the magnetic steels are arranged in the magnetic grooves. BRIEF DESCRIPTION OF DRAWINGS
[0009] The utility model is further described below in combination with the drawings and examples.
[0010] Figure 1 It is the structure schematic diagram of the rotor of the utility model;
[0011] Figure 2 It is Figure 1 It is the local enlarged view of A in the figure;
[0012] Figure 3 It is the structure schematic diagram of the magnetic steel in the utility model.
[0013] Figure 4 It is the structure schematic diagram of the magnetic steel in the utility model.
[0014] In the figure: 1, rotor body, 101, magnetic groove, 1011, mounting section, 1012, first heat dissipation section, 1013, second heat dissipation section, 1014, first limiting protrusion, 1015, second limiting protrusion, 2, magnetic steel;
[0015] X is the included angle formed between two magnetic steels on each magnetic pole;
[0016] L is the length of the magnetic steel;
[0017] W is the width of the magnetic steel. DETAILED DESCRIPTION
[0018] The utility model is further described below in combination with the drawings and examples.
[0019] The utility model is not limited to the following specific embodiments, and the person skilled in the art can implement the utility model by using other various specific embodiments according to the content disclosed in the utility model, or any design structure and idea using the utility model, simple changes or alterations, all fall within the protection scope of the utility model.
[0020] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.
[0021] In the description of the utility model, it needs to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0022] As Figures 1-4 shown, a rotor, comprising a rotor body 1, ten magnetic poles are uniformly distributed on the rotor body 1 along the circumferential direction thereof, ten magnetic slots 101 are uniformly distributed on the rotor body 1 along the circumference, each magnetic pole comprises a magnetic slot 101 arranged on the rotor and two magnetic steels 2 arranged in the magnetic slot 101, the included angle formed between the two magnetic steels 2 is X, and X is 145-150 degrees.
[0023] The length L of each magnetic steel 2 is 9.2mm, and the width W of each magnetic steel 2 is 3mm.
[0024] The magnetic slot 101 has two installation sections 1011 matched with the magnetic steel 2, the magnetic slot 101 is located between the two installation sections 1011 and is communicated with each other and forms a first heat dissipation section 1012, the first heat dissipation section 1012 is provided with a first limiting protrusion 1014 for limiting the radial displacement of the magnetic steel 2 between the installation section 1011, the end of the installation section 1011 away from the first heat dissipation section 1012 extends outwardly and has a second heat dissipation section 1013, the second heat dissipation section 1013 is provided with a second limiting protrusion 1015 for limiting the radial displacement of the magnetic steel 2 between the installation section 1011, the first limiting protrusion 1014 and the second limiting protrusion 1015 cooperate to limit the radial displacement of the magnetic steel 2 in the stator body, that is, the magnetic steel 2 is limited in the installation section 1011 by the first limiting protrusion 1014 and the second limiting protrusion 1015, and the first heat dissipation section 1012 and the second heat dissipation section 1013 can dissipate heat and ensure the stable and reliable operation of the magnetic steel 2.
[0025] The above ideal embodiment of the utility model is an inspiration, through the above description, the relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.
Claims
1. A rotor, comprising a rotor body (1), characterized in that: The rotor body (1) has ten magnetic poles evenly distributed along its circumference. Each magnetic pole includes a magnetic slot (101) on the rotor and two magnets (2) in the magnetic slot (101). The included angle between the two magnets (2) is X, which is 145°-150°.
2. The rotor according to claim 1, characterized in that: The length L of each magnet (2) is 9.2 mm, and the width W of each magnet (2) is 3 mm.
3. The rotor according to claim 1, characterized in that: The magnetic groove (101) has two mounting sections (1011) that match the magnet (2). The magnetic groove (101) is located between the two mounting sections (1011) and communicates with each other to form a first heat dissipation section (1012). A first limiting protrusion (1014) for limiting the radial displacement of the magnet (2) is provided between the first heat dissipation section (1012) and the mounting section (1011).
4. The rotor according to claim 3, characterized in that: The mounting section (1011) extends outward from the end away from the first heat dissipation section (1012) to have a second heat dissipation section (1013), and a second limiting protrusion (1015) for limiting the radial displacement of the magnet (2) is provided between the second heat dissipation section (1013) and the mounting section (1011).