An induction rotor for improving the torque of a switched reluctance motor

Abstract

This utility model relates to the field of switched reluctance motor technology, and particularly to an induction rotor for improving the torque of a switched reluctance motor. It includes a rotor and an induction magnetic guiding assembly, which is mounted on the rotor. The induction magnetic guiding assembly includes multiple sets of magnetic guiding elements, all mounted on the rotor, arranged equidistantly in a ring around the rotor's central axis. Each magnetic guiding element includes multiple sets of conductive rings, stacked together, with an insulating layer between adjacent sets of conductive rings. This utility model, through the arrangement of the induction magnetic guiding assembly, replaces single-layer conductive rings with multi-layer conductive rings, and the multiple layers of conductive rings are isolated by insulating layers, thereby cutting off eddy current paths, reducing losses caused by eddy currents, optimizing the magnetic field distribution, and improving the motor's efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of switched reluctance motor technology, and specifically relates to an induction rotor for improving the torque of a switched reluctance motor. Background Technology

[0002] The principle of a switched reluctance motor is that the magnetic circuit always closes along the path of least magnetic reluctance. The ideal magnetic circuit path is that the magnetic circuit starts from the energized salient pole of the stator core, passes through the air gap, then through the acting salient pole of the rotor core, then through the yoke of the rotor core, then through the acting salient pole of the rotor core, and then through the air gap back to the energized salient pole of the stator core. However, due to the limitation of core magnetization saturation and the characteristic of the magnetic circuit diverging outside the magnetic poles, part of the magnetic circuit will deviate from the designed closed path, and may even generate reverse torque, thereby reducing the magnetic energy utilization rate and the output torque.

[0003] A search revealed that in the prior art, patent application number CN202011167173.4 discloses an induction rotor and a switched reluctance motor. This invention uses conductive rings on the salient poles of the rotor core. During operation, the conductive rings generate induced current to form induced magnetic poles, causing the magnetic circuit to concentrate towards the rotor salient poles, thereby increasing the magnetic energy utilization rate and output torque.

[0004] The aforementioned patent uses conductive rings to increase magnetic energy utilization and output torque. However, the induced magnetic field is formed only by a single layer of conductive rings surrounding the salient poles. Eddy current losses surge at excessively high motor speeds, leading to a decrease in motor efficiency. Therefore, we need to propose an induction rotor to improve the torque of switched reluctance motors and solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an induction rotor that improves the torque of a switched reluctance motor. By setting up an induction magnetic guide component, the losses caused by eddy currents are reduced, the magnetic field distribution is optimized, and the efficiency of the motor is improved, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an induction rotor for improving the torque of a switched reluctance motor, comprising a rotor and an induction magnetic guiding component, wherein the induction magnetic guiding component is mounted on the rotor;

[0007] The inductive magnetic guiding component includes multiple sets of magnetic guiding elements, all of which are mounted on the rotor and are arranged in a ring at equal intervals with the rotor's central axis as the center.

[0008] The magnetic conductive component includes multiple sets of conductive rings, which are stacked together, and an insulating layer is provided between adjacent sets of conductive rings.

[0009] Furthermore, the inductive magnetic conductive assembly also includes two sets of end short-circuit rings, which are respectively disposed at both ends of the rotor, and the two sets of end short-circuit rings are respectively fixedly connected to multiple sets of magnetic conductive components.

[0010] Furthermore, the rotor includes a rotor core, and multiple sets of salient poles are fixedly connected to the sidewalls of the rotor core, and the multiple sets of salient poles are arranged in a ring at equal intervals with the neutral axis of the rotor core as the center.

[0011] Furthermore, the salient pole includes a pole body and a pole wing, one end of the pole body is fixedly connected to the side wall of the rotor core, and the pole wing is fixedly connected to the other end of the pole body.

[0012] Furthermore, the cross-section of the pole body is trapezoidal, and the end of the wing furthest from the pole body has an arc-shaped structure.

[0013] Furthermore, the rotor core, conductive ring, and end short-circuit ring are all provided with a protective coating, and the rotor core is made of high-permeability silicon steel sheets stacked together.

[0014] The beneficial effects of this utility model are:

[0015] This invention replaces a single-layer conductive ring with a multi-layer conductive ring by setting up an inductive magnetic conductive component. The multi-layer conductive rings are all isolated by an insulating layer, thereby cutting off the eddy current path, reducing the loss generated by eddy currents, optimizing the magnetic field distribution, and improving the efficiency of the motor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present utility model is shown;

[0018] Figure 2 A schematic diagram of the inductive magnetic conductive component structure according to an embodiment of the present invention is shown;

[0019] Figure 3 A schematic diagram of a rotor structure according to an embodiment of the present invention is shown;

[0020] Figure 4 A cross-sectional structural schematic diagram of the magnetic conductor according to an embodiment of the present invention is shown.

[0021] In the diagram: 100, rotor; 110, rotor core; 120, salient pole; 121, pole body; 122, pole wing; 200, induction magnetic component; 210, magnetic component; 211, conductive ring; 212, insulating layer; 220, end short-circuit ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] An induction rotor for improving the torque of a switched reluctance motor.

[0025] Includes rotor 100 and induction magnetic component 200;

[0026] The inductive magnetic conductive assembly 200 is mounted on the rotor 100;

[0027] The rotor 100 includes a rotor core 110, and multiple sets of salient poles 120 are fixedly connected to the side wall of the rotor core 110. The multiple sets of salient poles 120 are arranged in a ring at equal intervals with the neutral axis of the rotor core 110 as the center.

[0028] The rotor core 110 provides a low-resistivity path for the magnetic field lines. Multiple sets of annularly spaced salient poles 120 interact better with the stator magnetic field, generating periodically varying reluctance torque. This equidistant distribution ensures that the electromagnetic force on each salient pole 120 is uniform during rotor rotation, effectively reducing torque pulsation and improving motor smoothness. The slot width between the salient poles 120 is also optimized; a reasonable slot width balances reluctance variations and magnetic flux magnitude, enabling the motor to generate greater torque during operation.

[0029] The salient pole 120 includes a pole body 121 and a pole wing 122. One end of the pole body 121 is fixedly connected to the side wall of the rotor core 110, and the pole wing 122 is fixedly connected to the other end of the pole body 121.

[0030] The pole body 121, serving as the connection between the rotor core 110 and the pole wing 122, plays a role in conducting magnetic field lines. Its secure connection with the rotor core 110 ensures the continuity and stability of the magnetic circuit and reduces magnetic reluctance loss. The pole wing 122 directly interacts with the stator magnetic field. By rationally designing the shape and size of the pole wing 122, the magnetic field coupling strength between the salient pole 120 and the stator can be enhanced.

[0031] The cross-section of the pole body 121 is trapezoidal, and the end of the wing away from the pole body 121 is an arc-shaped structure.

[0032] The trapezoidal cross-section design of the pole body 121 makes the distribution of magnetic field lines more uniform within the pole body 121, reduces the concentration of magnetic field lines at the edges of the pole body 121, lowers the magnetic saturation level, and improves the magnetic permeability of the magnetic circuit. The arc-shaped structure of the pole wing 122 at the end away from the pole body 121 smooths the direction of the magnetic field lines, reduces the distortion and scattering of magnetic field lines at the tip of the pole wing 122, and reduces magnetic field energy loss.

[0033] The induction magnetic guiding assembly 200 includes two sets of end short-circuit rings 220 and multiple sets of magnetic guiding elements 210. The multiple sets of magnetic guiding elements 210 are respectively installed on multiple sets of pole bodies 121. The two sets of end short-circuit rings 220 are respectively disposed at both ends of the rotor core 110, and the two sets of end short-circuit rings 220 are respectively fixedly connected to the multiple sets of magnetic guiding elements 210.

[0034] The end short-circuit ring 220 and the magnetic conductor 210 work together to enhance the synergy of the induced magnetic field and reduce torque fluctuations. The end short-circuit ring 220 generates an induced current through electromagnetic induction when the rotor 100 rotates. The magnetic field formed by this current interacts with the stator magnetic field, enhancing the strength of the motor's combined magnetic field. Multiple sets of magnetic conductors 210 are mounted on the pole body 121, optimizing its magnetic permeability and allowing magnetic lines of force to pass through the pole body 121 more efficiently, thus enhancing the coupling effect between the salient pole 120 and the stator magnetic field. During motor operation, the induction magnetic conductor assembly 200 effectively increases the motor's electromagnetic torque.

[0035] The magnetic conductive component 210 includes multiple sets of conductive rings 211, which are all sleeved and connected to the pole body 121. The multiple sets of conductive rings 211 are stacked, and an insulating layer 212 is provided between adjacent sets of conductive rings 211.

[0036] The multiple stacked conductive rings 211 increase the equivalent conductive area of ​​the magnetic component 210, enabling it to generate a larger induced current under the same magnetic field change, thereby enhancing the magnetic field strength. The insulating layer 212 prevents short circuits between adjacent conductive rings 211, ensuring that each group of conductive rings 211 can independently generate an induced current and form its own magnetic field. The superposition of multiple magnetic fields enhances the overall magnetic field effect of the magnetic component 210. During motor operation, the induced current generated by the conductive rings 211 interacts with the stator magnetic field, generating additional electromagnetic force and increasing the torque output of the rotor 100.

[0037] The rotor core 110, conductive ring 211 and end short-circuit ring 220 are all provided with protective coatings. The rotor core 110 is made of high permeability silicon steel sheets stacked together.

[0038] The protective coating effectively prevents the rotor core 110, conductive ring 211, and end short-circuit ring 220 from corrosion, oxidation, and wear caused by the external environment, thus extending the service life of the rotor 100. The rotor core 110, made of high-permeability silicon steel sheets, features low hysteresis loss and low eddy current loss, which can reduce energy loss during motor operation and improve motor efficiency.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inductive rotor for improving the torque of a switched reluctance motor, comprising a rotor (100) and an inductive magnetically permeable assembly (200), characterized in that: The inductive magnetic guiding component (200) is mounted on the rotor (100); the inductive magnetic guiding component (200) includes multiple sets of magnetic guiding elements (210), all of which are mounted on the rotor (100), and the multiple sets of magnetic guiding elements (210) are arranged in a ring at equal intervals with the central axis of the rotor (100) as the center; the magnetic guiding element (210) includes multiple sets of conductive rings (211), which are stacked, and an insulating layer (212) is provided between adjacent sets of conductive rings (211).

2. The induction rotor for improving the torque of a switched reluctance motor according to claim 1, characterized in that: The inductive magnetic conductive assembly (200) also includes two sets of end short-circuit rings (220), which are respectively disposed at both ends of the rotor (100), and the two sets of end short-circuit rings (220) are respectively fixedly connected to multiple sets of magnetic conductive elements (210).

3. An induction rotor for improving the torque of a switched reluctance motor according to claim 2, characterized in that: The rotor (100) includes a rotor core (110), and multiple sets of salient poles (120) are fixedly connected to the side wall of the rotor core (110), and the multiple sets of salient poles (120) are arranged in a ring at equal intervals with the neutral axis of the rotor core (110) as the center.

4. An induction rotor for improving the torque of a switched reluctance motor according to claim 3, characterized in that: The salient pole (120) includes a pole body (121) and a pole wing (122). One end of the pole body (121) is fixedly connected to the side wall of the rotor core (110), and the pole wing (122) is fixedly connected to the other end of the pole body (121).

5. An induction rotor for improving the torque of a switched reluctance motor according to claim 4, characterized in that: The cross-section of the pole body (121) is trapezoidal, and the end of the pole wing (122) away from the pole body (121) is an arc-shaped structure.

6. An induction rotor for improving the torque of a switched reluctance motor according to claim 5, characterized in that: The rotor core (110), conductive ring (211) and end short-circuit ring (220) are all provided with protective coatings. The rotor core (110) is made of high permeability silicon steel sheets stacked together.

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