CN221202239U - Magnetic pole, motor and water turbine - Google Patents

Abstract

The application discloses a magnetic pole, a motor and a water turbine. The magnetic pole includes: the main part sets up in one side of base member and includes first segmentation and second segmentation, has first cambered surface through setting up one side that first segmentation deviates from the base member for the magnetic pole has the plane in one side that the second segmentation deviates from the base member, and the plane meets with first cambered surface, and the plane is for first cambered surface orientation base member bending type setting. Because the air gap at the position corresponding to the plane is larger than the air gap at the position corresponding to the first cambered surface, the magnetic pulling force can be well reduced, the air gap field is more nearly sinusoidal, the harmonic loss is reduced, and the motor operation efficiency is improved, so that the torque is increased under the same rotating speed.

Description

Magnetic pole, motor and water turbine

Technical Field

The application belongs to the technical field of motors, and particularly relates to a magnetic pole, a motor and a water turbine.

Background

The motor is an electromagnetic device capable of converting or transmitting electric energy according to the law of electromagnetic induction, and can be classified into a generator capable of converting mechanical energy into electric energy and a motor capable of converting electric energy into mechanical energy.

When the rotor rotates relative to the stator, for example, when the motor is a generator and is driven to rotate relative to the stator by external driving force (such as hydraulic force or wind force, etc.), the magnetic poles in the motor are easy to generate unbalanced magnetic tension under the influence of uneven external driving force and unstable magnetic field distribution in the motor, so that the problems of vibration increase and noise aggravation of the motor are easy to be caused, friction collision between the rotor and the stator is easy to be caused, and the working stability of the motor is reduced.

Disclosure of Invention

The embodiment of the application provides a magnetic pole, a motor and a water turbine, and aims to solve the problem of unbalanced magnetic tension in the motor.

In a first aspect, embodiments of the present application provide a magnetic pole for an electric machine, the magnetic pole comprising: a base; the main body is arranged on one side of the base body and comprises a first section and a second section, wherein one side of the first section, which is away from the base body, is provided with a first cambered surface, one side of the second section, which is away from the base body, is provided with a plane, the plane is connected with the first cambered surface, and the plane is bent towards the base body relative to the first cambered surface.

According to an embodiment of the first aspect of the application, the first cambered surface comprises a connecting edge connected with the plane, and the angle between the plane and the tangent plane of the connecting edge is in the range of 10 ° to 12 °.

According to any of the foregoing embodiments of the first aspect of the present application, the number of the second segments is at least two, and each of the second segments is divided on both sides of the first segment.

According to any of the foregoing embodiments of the first aspect of the application, an end of the second segment facing away from the first segment protrudes from the base body.

In a second aspect, an embodiment of the present application provides an electric machine, including: a stator; the rotor is rotatably arranged relative to the stator, and comprises the magnetic poles in any embodiment of the first aspect, and the main body of the magnetic poles is positioned on one side of the base body facing the stator.

According to an embodiment of the second aspect of the application, the side of the stator facing the rotor has a second cambered surface, which is arranged coaxially with the first cambered surface.

According to any of the foregoing embodiments of the second aspect of the application, the rotor is rotatably disposed about the axis of the first cambered surface relative to the stator.

According to any one of the foregoing embodiments of the second aspect of the present application, the stator includes a core and a plurality of teeth located on a side of the core facing the rotor, the plurality of teeth encircling a circumferential side of the rotor and being spaced apart from each other, and the second cambered surface is located on a side of the teeth facing the rotor.

According to any one of the foregoing embodiments of the second aspect of the present application, the rotor further includes a yoke, the magnetic poles are disposed on a side of the yoke facing the stator, and the number of the magnetic poles is plural, and the plural magnetic poles are circumferentially around the yoke and are spaced apart from each other.

In a third aspect, an embodiment of the application provides a water turbine comprising an electric motor according to any of the embodiments of the second aspect.

The magnetic pole for the motor provided by the embodiment of the application comprises a matrix and a main body. The main part sets up in one side of base member and includes first segmentation and second segmentation, has first cambered surface through setting up one side that first segmentation deviates from the base member for the magnetic pole has the plane in one side that the second segmentation deviates from the base member, and the plane meets with first cambered surface, and the plane is for first cambered surface orientation base member bending type setting. When the magnetic poles are offset, the air gap at the position corresponding to the plane is larger than the air gap at the position corresponding to the first cambered surface, so that the magnetic pulling force can be well reduced, the air gap field is more close to sinusoidal distribution, the harmonic loss is reduced, the motor operation efficiency is improved, and the torque is increased under the condition of the same rotating speed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

FIG. 1 is a schematic illustration of a magnetic pole according to some embodiments of the present application;

FIG. 2 is a second schematic diagram of a magnetic pole according to some embodiments of the present application;

FIG. 3 is a schematic illustration of a rotor according to some embodiments of the present application;

FIG. 4 is a schematic illustration of a rotor and stator configuration in accordance with some embodiments of the present application;

Fig. 5 is a partial enlarged view of fig. 4 at a.

Reference numerals illustrate:

100-magnetic poles; 101-substrate; 102-a body; 103-first segmentation; 103 a-a first cambered surface; 104-a second segment; 104 a-plane; 105-connecting edges; 106-bulge;

200-stator; 201-a second cambered surface; 202-a core; 203-teeth;

300-rotor; 301-a magnetic yoke;

alpha-angle.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the application only and not limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by illustrating examples thereof, and in the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In this context, unless otherwise indicated, the meaning of "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Moreover, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the embodiment of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

The motor provided in some embodiments of the present application may be a generator or a motor, and for convenience of description, the following embodiments will take the motor as an example of the generator. For a better understanding of the present application, the magnetic pole, motor and turbine according to the embodiments of the present application will be described in detail with reference to fig. 1 to 5.

Fig. 1 is a schematic diagram of a magnetic pole 100 according to some embodiments of the present application, fig. 2 is a schematic diagram of a second magnetic pole 100 according to some embodiments of the present application, fig. 3 is a schematic diagram of a rotor 300 according to some embodiments of the present application, fig. 4 is a schematic diagram of a rotor 300 and a stator 200 according to some embodiments of the present application, and fig. 5 is a partial enlarged view at a in fig. 4.

In the field of hydro-generators, the design of the pole 100 of a hydro-generator presents unique challenges due to its particular operating environment and requirements. The hydraulic generator rotates under the action of water flow, and mechanical energy generated by rotation is converted into electric energy, but during operation, due to non-uniformity of water flow and instability of magnetic field distribution, a driving end flange of the hydraulic generator is often triggered to vibrate, so that the center of the rotor 300 is offset relative to the center of the stator 200. The gap between the stator 200 and the rotor 300 is an air gap, the air gap between the rotor 300 and the stator 200 at a part of positions is reduced, the air gap at the other part is increased, and uneven air gap between the stator and the rotor in the motor causes an uneven magnetic pulling force between the two.

Referring to fig. 1, 2 and 3, in order to solve the above-mentioned problems, a magnetic pole 100 for an electric machine according to the present application includes: the base body 101, the main body 102 is arranged on one side of the base body 101 and comprises a first segment 103 and a second segment 104, a first cambered surface 103a is arranged on one side, away from the base body 101, of the first segment 103, a plane 104a is arranged on one side, away from the base body 101, of the second segment 104, the plane 104a is connected with the first cambered surface 103a, and the plane 104a is bent towards the base body 101 relative to the first cambered surface 103 a.

The embodiment of the present application provides a magnetic pole 100 for an electric machine comprising a base 101 and a body 102. The main body 102 is arranged on one side of the base body 101 and comprises a first segment 103 and a second segment 104, and by arranging that the side of the first segment 103, which faces away from the base body 101, is provided with a first cambered surface 103a, the magnetic pole 100 is provided with a plane 104a on the side of the second segment 104, which faces away from the base body 101, the plane 104a is connected with the first cambered surface 103a, and the plane 104a is bent towards the base body 101 relative to the first cambered surface 103 a. When the magnetic pole 100 is offset, the air gap at the position corresponding to the plane 104a is larger than the air gap at the position corresponding to the first cambered surface 103a, so that unbalanced magnetic tension can be well reduced, the air gap field is more close to sinusoidal distribution, harmonic loss is reduced, torque is increased under the condition of the same rotating speed, and motor operation efficiency is improved.

In some alternative embodiments, the first arcuate surface 103a includes a connecting edge 105 that meets a planar surface 104a, and the planar surface 104a is at an angle α ranging from 10 ° to 12 ° from a tangent plane to the connecting edge 105.

In these alternative embodiments, the plane 104a is tangent to the first cambered surface 103a, and the angle α between the plane 104a and the tangent plane of the connecting edge 105 is in the range of 10 ° to 12 °, so that the air gap at part of the positions can be increased, and the unbalanced magnetic pull force can be reduced better, and the magnetomotive force can be increased.

Alternatively, the included angle α between the plane 104a and the tangential plane of the connecting edge 105 is 11 °, so that the air gap at part of the positions can be better increased, the unbalanced magnetic tension can be better reduced, and the magnetic moment can be increased.

In some alternative embodiments, the number of second segments 104 is at least two, and each second segment 104 is split on either side of the first segment 103.

In these alternative embodiments, the number of second segments 104 is at least two, such that the air gap on both sides of the same pole 100 is increased, further reducing the unbalanced magnetic pull and increasing the magnetomotive force.

Alternatively, the angle α between the second segment planes 104a on both sides and the tangential plane of the connecting edge 105 may be different, as long as the angle α is within the range of 10 ° to 12 °.

Alternatively, the included angle α between two sides may be the same, so that unbalanced magnetic tension may be reduced more evenly, and magnetomotive force may be increased.

In some alternative embodiments, an end of the second segment 104 facing away from the first segment 103 is disposed protruding from the base 101.

In these alternative embodiments, the end of the second segment 104 facing away from the first segment 103 protrudes from the base 101 and forms a protrusion 106, the protrusion 106 being used to secure a winding, which is wound around the protrusion 106, the winding being energized so as to generate a time-varying magnetic field.

An example according to the second aspect of the present application provides an electric machine, as shown in fig. 1, 4 and 5, comprising a stator 200 and a rotor 300, the rotor 300 being rotatably arranged with respect to the stator 200, the rotor 300 comprising the poles 100 of any of the embodiments of the first aspect described above, the body 102 of the poles 100 being located on the side of the base 101 facing the stator 200.

In these alternative embodiments, the motor comprises a stator 200, a rotor 300 comprising the poles 100 as described previously, the poles 100 comprising a base 101 and a body 102. The main body 102 is arranged on one side of the base body 101 and comprises a first segment 103 and a second segment 104, and by arranging that the side of the first segment 103, which faces away from the base body 101, is provided with a first cambered surface 103a, the magnetic pole 100 is provided with a plane 104a on the side of the second segment 104, which faces away from the base body 101, the plane 104a is connected with the first cambered surface 103a, and the plane 104a is bent towards the base body 101 relative to the first cambered surface 103 a. When the magnetic pole 100 is offset, the air gap at the position corresponding to the plane 104a is larger than the air gap at the position corresponding to the first cambered surface 103a, so that unbalanced magnetic tension can be well reduced, the air gap field is more close to sinusoidal distribution, harmonic loss is reduced, torque is increased under the condition of the same rotating speed, and motor operation efficiency is improved.

In some alternative embodiments, the side of the stator 200 facing the rotor 300 has a second cambered surface 201, the second cambered surface 201 being arranged coaxially with the first cambered surface 103 a.

In these alternative embodiments, the second cambered surface 201 is coaxially arranged with the first cambered surface 103a, that is, the centers of the stator 200 and the rotor 300 coincide, so that the possibility that the center positions of the stator 200 and the rotor 300 are relatively shifted due to magnetic attraction force, thereby affecting motor assembly and motor power can be reduced. And the centers of the stator 200 and the rotor 300 coincide with each other, so that the air gap between the second cambered surface 201 and the main body 102 of the magnetic pole 100 is equal, and therefore, after the magnetic pole 100 is offset in a severe working environment of the motor, the difference of the air gap between each magnetic pole 100 and the second cambered surface 201 of the stator 200 is reduced.

In some alternative embodiments, stator 200 includes a core 202 and a plurality of teeth 203 on a side of core 202 facing rotor 300, wherein plurality of teeth 203 are circumferentially around rotor 300 and are spaced apart, and second cambered surface 201 is located on a side of teeth 203 facing rotor 300.

In these alternative embodiments, the teeth 203 are used to secure the stator 200 windings, which when energized produce a magnetic field.

In some alternative embodiments, rotor 300 is rotatably disposed about an axis of first arcuate surface 103a relative to stator 200.

In these alternative embodiments, the rotor 300 is rotatably disposed about the axis of the first cambered surface 103a relative to the stator 200, and the magnetic field interaction between the stator 200 and the rotor 300 generates a braking torque, and the mechanical energy is converted into electrical energy for output by using the principle of electromagnetic induction in which the wire cuts the magnetic lines of force to induce an electrical potential.

In some alternative embodiments, as shown in fig. 3, the rotor 300 further includes a yoke 301, the magnetic poles 100 are disposed on a side of the yoke 301 facing the stator 200, and the number of the magnetic poles 100 is plural, and the plural magnetic poles 100 are circumferentially around the yoke 301 and are spaced apart.

In these alternative embodiments, a plurality of magnetic poles 100 are circumferentially spaced around the yoke 301, the yoke 301 itself not producing a magnetic field, magnetically soft material that acts as a magnetic line transport in the magnetic circuit.

An example of a third aspect of the application provides a hydraulic turbine, as shown in figures 1, 2, 4 and 5, comprising an electric motor according to any of the embodiments of the second aspect described above.

An embodiment of the third aspect of the present application provides a water turbine comprising an electric machine as described above, the electric machine comprising a stator 200 and a rotor 300, the rotor 300 comprising poles 100. Wherein the magnetic pole 100 includes a base 101 and a main body 102. The main body 102 is arranged on one side of the base body 101 and comprises a first segment 103 and a second segment 104, and by arranging that the side of the first segment 103, which faces away from the base body 101, is provided with a first cambered surface 103a, the magnetic pole 100 is provided with a plane 104a on the side of the second segment 104, which faces away from the base body 101, the plane 104a is connected with the first cambered surface 103a, and the plane 104a is bent towards the base body 101 relative to the first cambered surface 103 a. When the gap between the stator 200 and the rotor 300 is an air gap, and the magnetic pole 100 is offset, the air gap at the position corresponding to the plane 104a is larger than the air gap at the position corresponding to the first cambered surface 103a, so that unbalanced magnetic tension can be well reduced, the air gap magnetic field is more nearly sinusoidal, harmonic loss is reduced, torque is increased under the condition of the same rotating speed, and motor operation efficiency is improved.

Optionally, the water turbine comprises a rotating shaft, a main shaft connected with the rotor bearing and the rotating shaft, and a volute for containing water, wherein the water pushes the rotating shaft to drive the main shaft to rotate, so that the rotor is driven to rotate for generating electricity.

Optionally, the center of the circle corresponding to the orthographic projection of the first cambered surface 103a in the axial direction of the rotor is the rotation center of the rotor, the radius is 8101mm, the length of the radian corresponding to the first cambered surface 103a is 565mm, and the total length of the circle is 0.6457. The length of the orthographic projection of the two side planes along the rotor axial direction is 154mm, and the included angle alpha between the plane 104a and the tangent plane of the connecting edge 105 is 11 degrees.

As described above, the main body 102 of the original magnetic pole is a cambered surface and has no plane 104a, and the unbalanced magnetic tension of the magnetic pole of the present application is reduced by 3.9% when the magnetic pole is eccentric by 0.2mm as compared with the original magnetic pole. The magnetomotive moment is increased by 5.8%, which means that the magnetic pulling force is reduced on the premise of the same excitation, but the power generation efficiency is improved.

In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present application, and they should be included in the scope of the present application.

Claims (10)

1. A pole for an electric machine, the pole comprising:

a base;

The main part sets up in one side of base member and includes first segmentation and second segmentation, first segmentation deviates from one side of base member has first cambered surface, second segmentation deviates from one side of base member has the plane, the plane with first cambered surface meets, just the plane for first cambered surface orientation the setting of buckling of base member.

2. A pole according to claim 1, wherein the first cambered surface comprises a connecting edge which is connected with the plane, and the angle between the plane and the tangent plane of the connecting edge is in the range of 10 ° to 12 °.

3. The pole of claim 1, wherein the number of second segments is at least two, and each of the second segments is separated from both sides of the first segment.

4. The pole of claim 1, wherein an end of the second segment facing away from the first segment protrudes from the base.

5. An electric machine, comprising:

a stator;

a rotor rotatably arranged with respect to the stator, the rotor comprising a pole according to any one of claims 1 to 4, the body of the pole being located on a side of the base body facing the stator.

6. The electric machine of claim 5, wherein a side of the stator facing the rotor has a second arcuate surface, the second arcuate surface being disposed coaxially with the first arcuate surface.

7. The electric machine of claim 6, wherein the rotor is rotatably disposed about an axis of the first arcuate surface relative to the stator.

8. The motor of claim 6, wherein the stator includes a core and a plurality of teeth on a side of the core facing the rotor, the plurality of teeth being circumferentially spaced around the rotor, the second arcuate surface being on a side of the teeth facing the rotor.

9. The electric machine according to any one of claims 5 to 8, wherein the rotor further comprises a yoke, the magnetic poles are disposed on a side of the yoke facing the stator, and the number of the magnetic poles is plural, and the plurality of the magnetic poles are circumferentially around the yoke and are spaced apart.

10. A water turbine comprising an electric machine as claimed in any one of claims 5 to 9.