Motor and electronic water pump with same

Abstract

The utility model provides a motor and an electronic water pump with the same. The motor comprises a rotor and a stator which are arranged along the extension direction of a rotation axis, and the rotor can rotate around the rotation axis relative to the stator. The stator comprises a stator winding and a first magnetizer. The first magnetizer is located on the side, back to the rotor, of the stator winding. The stator winding includes a plurality of energized coils arranged about the axis of rotation. The stator also includes a plurality of second magnetizers disposed about the axis of rotation. The plurality of second magnetizers are located on a side of the stator winding facing the rotor. And the plurality of second magnetizers correspond to the plurality of electrified coils respectively. Each second magnetizer is aligned with a corresponding energized coil in a direction about the axis of rotation. Under the cooperation of the first magnetizer and the plurality of second magnetizers, the arrangement of the magnetic field between the stator winding and the rotor is relatively concentrated, and the magnetic field is concentrated and guided to the rotor, so that the energy loss is reduced, the efficiency of the motor is improved, and the performance of the motor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor field, especially, relate to a kind of motor and electronic water pump with it. BACKGROUND

[0002] A motor is a device that converts electrical energy into mechanical energy, which is widely used in various devices, such as electronic water pumps. The rotor and stator of some motors are arranged along the extension direction of the rotation axis. Such a motor can be referred to as an axial motor, or an axial magnetic field motor. In operation, the stator generates a rotating magnetic field, which acts on the rotor to form a magnetic electric power rotating torque. This process involves energy loss, which reduces the efficiency of the motor and degrades the performance of the motor. SUMMARY

[0003] Therefore, the utility model provides a kind of motor and electronic water pump with it, to reduce the energy loss of motor, to improve the efficiency of motor, improve the performance of motor.

[0004] In one aspect, the utility model provides a kind of motor. The motor includes a rotor and a stator arranged along the extension direction of the rotation axis, and the rotor is rotatable relative to the stator about the rotation axis. The stator includes a stator winding and a first magnetic conductor. The first magnetic conductor is located on the side of the stator winding facing away from the rotor. The stator winding includes a plurality of energized coils arranged around the rotation axis. The stator further includes a plurality of second magnetic conductors arranged around the rotation axis. The plurality of second magnetic conductors are located on the side of the stator winding facing the rotor. The plurality of second magnetic conductors and the plurality of energized coils correspond respectively. Each second magnetic conductor is aligned with the corresponding energized coil in the direction around the rotation axis.

[0005] When the motor operates, the stator winding generates a rotating magnetic field, which acts on the rotor under the concentration and guidance of the first magnetic conductor and the plurality of second magnetic conductors, thereby forming a magnetic electric power rotating torque to drive the rotor to rotate about the rotation axis. Under the cooperation of the first magnetic conductor and the plurality of second magnetic conductors, the magnetic field arrangement between the stator winding and the rotor will be more concentrated, concentrated and guided to the rotor, thereby reducing energy loss, improving the efficiency of the motor and improving the performance of the motor. Therefore, the motor has high efficiency and excellent performance.

[0006] In some embodiments, the side of the first magnetic conductor facing the plurality of energized coils is provided with a plurality of protrusions. The plurality of energized coils correspond to the plurality of protrusions respectively. Each energized coil surrounds the corresponding protrusion.

[0007] The plurality of protrusions participate in the concentration and guidance of the magnetic field, helping to more effectively concentrate and guide the magnetic field to the rotor, thereby more effectively improving the efficiency of the motor and improving the performance of the motor.

[0008] In some embodiments, the plurality of protrusions are in contact with the plurality of second magnetic conductors respectively.

[0009] If the protrusions are not in contact with the second magnetic conductors, the magnetic field needs to propagate through the air gap between the protrusions and the second magnetic conductors. Since the air has a low magnetic permeability, the magnetic field strength will be reduced when passing through the air gap, which results in more energy loss. By contacting the protrusions with the second magnetic conductors, the magnetic field can directly propagate between the first magnetic conductor and the second magnetic conductor, which increases the magnetic field strength and reduces the energy loss, thereby improving the efficiency and performance of the motor.

[0010] In some embodiments, any two of the plurality of second magnetic conductors are not in contact with each other.

[0011] If the plurality of second magnetic conductors are in contact with each other, a magnetic circuit will be formed between the plurality of magnetic conductors, which makes it difficult to concentrate and guide the magnetic field to the rotor. In the current embodiment, any two of the plurality of second magnetic conductors are not in contact with each other, which avoids the formation of a magnetic circuit between the plurality of magnetic conductors, so that the magnetic field can be concentrated and guided to the rotor, thereby helping the motor to obtain higher efficiency and better performance.

[0012] In some embodiments, a plane perpendicular to the rotation axis is defined as a projection plane, and the orthographic projection of each second magnetic conductor on the projection plane covers the orthographic projection of the corresponding energized coil on the projection plane.

[0013] According to this configuration, the magnetic field generated by each energized coil can pass through the corresponding second magnetic conductor more, so that the corresponding second magnetic conductor can more effectively concentrate and guide the magnetic field to the rotor, thereby more effectively improving the efficiency and performance of the motor.

[0014] In some embodiments, the first magnetic conductor is in the shape of a disc around the rotation axis, and the plurality of second magnetic conductors are in the shape of a disc around the rotation axis as a whole.

[0015] According to this configuration, the cooperation of the first magnetic conductor and the plurality of second magnetic conductors can more effectively concentrate and guide the magnetic field to the rotor, thereby more effectively improving the efficiency and performance of the motor.

[0016] In some embodiments, each second magnetic conductor is in the shape of a fan ring.

[0017] On the premise that the plurality of second magnetic conductors are in the shape of a disc around the rotation axis as a whole, configuring each second magnetic conductor in the shape of a fan ring can improve the utilization of planar space and ensure that the area of each second magnetic conductor is large enough.

[0018] In some embodiments, a plane perpendicular to the rotation axis is defined as a projection plane, and the orthographic projection of the first magnetic conductor on the projection plane covers the orthographic projection of the plurality of second magnetic conductors on the projection plane.

[0019] According to the configuration, the cooperation of the first magnetic conductor and the plurality of second magnetic conductors can more effectively concentrate and guide the magnetic field to the rotor, thereby more effectively improving the efficiency of the motor and improving the performance of the motor.

[0020] In some embodiments, the plurality of energized coils are a plurality of printed circuits formed on a printed circuit board.

[0021] Forming the plurality of energized coils as a plurality of printed circuits on a printed circuit board helps to simplify the configuration of the motor, simplify the assembly process of the motor, and shorten the axial dimension of the motor.

[0022] On the other hand, the utility model provides an electronic water pump, the electronic water pump includes impeller and above -mentioned aspect provides motor, impeller rotates under the drive of this motor. BRIEF DESCRIPTION OF DRAWINGS

[0023] It should be understood that the following drawings only show some embodiments of the utility model and should not be considered as limiting the scope.

[0024] It should be understood that the same or similar reference signs are used in the drawings to represent the same or similar elements.

[0025] It should be understood that the drawings are only schematic and the dimensions and proportions of the elements in the drawings are not necessarily to scale.

[0026] Figure 1 is a structural schematic diagram showing the magnetic field distribution of the motor according to the related art.

[0027] Figure 2 is a structural schematic diagram of a motor according to an embodiment of the utility model.

[0028] Figure 3 is an exploded schematic diagram of the motor in Figure 2 .

[0029] Figure 4 is a structural schematic diagram of the plurality of energized coils of the stator winding in Figure 3 .

[0030] Figure 5 is a structural schematic diagram of the plurality of second magnetic conductors in Figure 3 .

[0031] Figure 6 is a structural schematic diagram showing the magnetic field distribution of the motor in Figure 2 .

[0032] Figure 7 is an exploded schematic diagram of a motor according to another embodiment of the utility model.

[0033] Figure 8 is a structural schematic diagram showing a magnetic field distribution of the motor in Figure 7 .

[0034] Figure 9 is a structural schematic diagram of an electronic water pump according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] Numerous specific details are set forth in the following description in order to provide a thorough understanding of the structure, function, and use of the embodiments as described in the specification and illustrated in the various drawings. It will be appreciated that the embodiments described and illustrated are non-limiting examples, and that specific structural and functional details disclosed herein are representative and exemplary. Variations to these embodiments can be made and will be appreciated by those of ordinary skill without departing from the scope of the claims.

[0036] For ease of understanding, first in combination with Figure 1 The motor 100 provided by the related art and problems thereof are described.

[0037] Referring to Figure 1 , the motor 100 includes a rotor 110 and a stator 120. The rotor 110 and the stator 120 are arranged along an extension direction of a rotation axis R. The stator 120 includes a stator winding 121, and the stator winding 121 includes a plurality of energized coils 122 arranged around the rotation axis R. When the motor 100 operates, the stator winding 121 generates a rotating magnetic field, and the rotating magnetic field acts on the rotor 110 to form a magnetic electric power rotating torque, thereby driving the rotor 110 to rotate around the rotation axis R.

[0038] The stator 120 further includes a first magnetic conductor 122. The first magnetic conductor 122 and the stator winding 121 are arranged along the extension direction of the rotation axis R, and the first magnetic conductor 122 is located on a side of the stator winding 121 facing away from the rotor 110. The first magnetic conductor 122 can play a role of concentrating and guiding the magnetic field to the rotor 110. However, as Figure 1 indicated, although the first magnetic conductor 122 exists, the magnetic field arrangement between the stator winding 121 and the rotor 110 is still relatively scattered, which leads to more energy loss, thereby reducing the efficiency of the motor 100 and degrading the performance of the motor 100.

[0039] <Exemplary motor>

[0040] Therefore, an embodiment of the present application provides a motor 200.

[0041] Referring to Figure 2 and Figure 3, the motor 200 can include a rotor 210 and a stator 220. The rotor 210 can rotate relative to the stator 220 about a rotation axis R, and the rotor 210 and the stator 220 can be arranged along an extension direction of the rotation axis R. The stator 220 can include a stator winding 221, a first magnetic conductor 222, and a plurality of second magnetic conductors 223. The first magnetic conductor 222, the stator winding 221, and the plurality of second magnetic conductors 223 can be arranged along the extension direction of the rotation axis R, the first magnetic conductor 223 can be located on a side of the stator winding 221 facing away from the rotor 210, and the plurality of second magnetic conductors 223 can be located on a side of the stator winding 221 facing the rotor 210.

[0042] With reference to FIG. 3 and Figure 4 , the stator winding 221 can include a plurality of energized coils 22, and the plurality of energized coils 22 can be arranged around the rotation axis R. With reference to Figure 3 and Figure 5 , the plurality of second magnetic conductors 223 can be arranged around the rotation axis R to respectively correspond to the plurality of energized coils 22. Each second magnetic conductor 223 can be aligned with a corresponding energized coil 22 in a direction around the rotation axis R. That is, in a projection plane perpendicular to the rotation axis R, a normal projection of each second magnetic conductor 223 and a normal projection of the corresponding energized coil 22 can at least partially overlap.

[0043] With reference to Figure 6 , when the motor 200 is running, the stator winding 221 generates a rotating magnetic field, which acts on the rotor 210 under the concentration and guidance of the first magnetic conductor 222 and the plurality of second magnetic conductors 223, thereby forming a magnetic electric power rotating torque to drive the rotor 210 to rotate about the rotation axis R. Under the cooperation of the first magnetic conductor 222 and the plurality of second magnetic conductors 223, the magnetic field arrangement between the stator winding 221 and the rotor 210 will be more concentrated and guided to the rotor 210, thereby reducing energy loss, improving the efficiency of the motor 200, and improving the performance of the motor 200. Therefore, the motor 200 has higher efficiency and better performance.

[0044] With reference to Figure 3 , Figure 5 and Figure 6, any two of the plurality of second magnetic conductors 223 can not contact each other. By way of example only, the plurality of second magnetic conductors 223 can be arranged to be spaced apart from each other around the rotation axis R. In some embodiments, any two adjacent second magnetic conductors 223 can be spaced apart by air. In other embodiments, a member with poor magnetic conductivity can be provided between any two adjacent second magnetic conductors 223. If the plurality of second magnetic conductors 223 contact each other, a magnetic circuit flowing between the plurality of magnetic conductors 223 can be formed, which can make it difficult to concentrate and direct the magnetic field to the rotor 210. In the current embodiments, any two of the plurality of second magnetic conductors 223 do not contact each other, which can avoid the formation of a magnetic circuit flowing between the plurality of magnetic conductors 223, so that the magnetic field can be concentrated and directed to the rotor 210, thereby helping the motor 200 to achieve higher efficiency and better performance.

[0045] With reference to Figures 4 to 6 , a normal projection of each second magnetic conductor 223 on a projection plane can cover a normal projection of the corresponding energized coil 22 on the projection plane. Here, the projection plane can be a plane perpendicular to the rotation axis R. According to this configuration, the magnetic field generated by each energized coil 22 can pass through the corresponding second magnetic conductor 223 more, so that the corresponding second magnetic conductor 223 can more effectively concentrate and direct the magnetic field to the rotor 210, thereby more effectively improving the efficiency of the motor 200 and improving the performance of the motor 200.

[0046] With reference to Figures 3 to 5 , the rotor 210 can be in the shape of a disc around the rotation axis R, and the stator winding 221, i.e. the plurality of energized coils 22, can also be in the shape of a disc around the rotation axis R. With continued reference to Figures 3 to 5 , the first magnetic conductor 222 can be in the shape of a disc around the rotation axis R, and correspondingly, the plurality of second magnetic conductors 223 can also be in the shape of a disc around the rotation axis R. According to this configuration, the cooperation of the first magnetic conductor 222 and the plurality of second magnetic conductors 223 can more effectively concentrate and direct the magnetic field to the rotor 210, thereby more effectively improving the efficiency of the motor 200 and improving the performance of the motor 200.

[0047] Further, with reference to Figure 5 , each second magnetic conductor 223 can be in the shape of a sector ring. With the plurality of second magnetic conductors 223 being in the shape of a disc around the rotation axis R, the configuration of each second magnetic conductor 223 as a sector ring can improve the utilization of planar space and ensure that the area of each second magnetic conductor 223 is large enough.

[0048] Further, with reference to Figure 3, the orthographic projection of the first magnetic conductor 222 on a projection plane can cover the orthographic projection of the plurality of second magnetic conductors 223 on the projection plane. Here, the projection plane can be a plane perpendicular to the rotation axis R. According to this configuration, the cooperation of the first magnetic conductor 222 and the plurality of second magnetic conductors 223 can more effectively concentrate and guide the magnetic field to the rotor 210, thereby more effectively improving the efficiency of the motor 200 and improving the performance of the motor 200.

[0049] As an implementation manner, with continued reference to Figure 3 , the stator 220 can include a PCB (Printed Circuit Board), and the stator winding 221, i.e., the plurality of energized coils 22 can be a plurality of printed circuits formed on the printed circuit board. Implementing the plurality of energized coils 22 as a plurality of printed circuits formed on the printed circuit board helps to simplify the configuration of the motor 200, simplify the assembly process of the motor 200, and shorten the axial dimension of the motor 200. Prospectively, in some alternative examples, the plurality of energized coils 22 can also be a plurality of wire coils formed by winding a wire.

[0050] The first magnetic conductor 222 and the plurality of second magnetic conductors 223 can be made of a material with excellent magnetic conductive performance. By way of example only, the first magnetic conductor 222 and the plurality of second magnetic conductors 223 can be made of carbon steel, silicon steel, etc. Prospectively, in other examples of the present application, the first magnetic conductor 222 and the plurality of second magnetic conductors 223 can also be made of other materials, for example, can also be made of aluminum alloy or copper-nickel alloy. The first magnetic conductor 222 and the plurality of second magnetic conductors 223 can be made of the same material or different materials, and the present application does not make special limitations on this.

[0051] <Variant of the motor>

[0052] In the foregoing, the motor 200 according to an embodiment of the present application is described. In the following, the motor 200a according to a variant of the present application is described with reference to Figures 2 to 6 The motor 200 according to an embodiment of the present application is described. In the following, the motor 200a according to a variant of the present application is described with reference to Figure 7 and Figure 8 , it can be understood that the motor 200a has many same or similar elements as the motor 200, and for the purpose of brevity, the same reference numerals are used for these same elements, and the repeated description is appropriately omitted.

[0053] With reference to Figure 7 , in the current variant, the side of the first magnetic conductor 222a facing the stator winding 221 can be provided with a plurality of protruding portions 224, and the plurality of energized coils 22 of the stator winding 221 can correspond to the plurality of protruding portions 224 respectively. As Figure 8As shown, each energized coil 22 can surround a corresponding protrusion 224. The plurality of protrusions 224 participate in the concentration and guidance of the magnetic field, which more effectively concentrates and guides the magnetic field to the rotor 210, thereby more effectively improving the efficiency of the motor 200a and improving the performance of the motor 200a.

[0054] Further, referring to Figure 8 , the plurality of protrusions 224 can respectively contact the plurality of second magnetic conductors 223. That is, each protrusion 224 can pass through the corresponding energized coil 22 and contact the corresponding second magnetic conductor 223. If the protrusion 224 does not contact the second magnetic conductor 223, the magnetic field needs to propagate through the air gap between the protrusion 224 and the second magnetic conductor 223. Since the permeability of air is low, passing through the air gap will reduce the strength of the magnetic field, thereby causing more energy loss. By contacting the protrusion 224 and the second magnetic conductor 223, the magnetic field is directly propagated between the first magnetic conductor 222 and the second magnetic conductor 223, which improves the magnetic field strength and reduces energy loss, thereby improving the efficiency of the motor 200a and improving the performance of the motor 200a.

[0055] <Example electronic water pump>

[0056] Embodiments of the present application also provide an electronic water pump 300. Referring to Figure 9 , the electronic water pump 300 can include the motor 200 (or the motor 200a) and the impeller 400 described above. The impeller 400 can be synchronously rotatably connected to the rotor 210 of the motor 200 (or the motor 200a), so that the rotor 210 drives the impeller 400 to rotate when the rotor 210 rotates. With the rotation of the impeller 400, the impeller 400 pushes the fluid medium, so that the fluid medium entering from the inlet 410 is discharged from the outlet 420.

[0057] By way of example only, the electronic water pump 300 can be applied to the thermal management system of a vehicle, in particular a new energy vehicle. Prospectively, in other embodiments of the present application, the electronic water pump 300 can also be applied in other scenarios. Prospectively, in other embodiments of the present application, the motor 200 (or the motor 200a) can also be applied in other devices other than the electronic water pump 300.

[0058] It should be noted that the various elements described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will not describe various possible combinations again.

[0059] It should be understood that a plurality of components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into separate components and / or parts. The disclosure describing a component or part as "a" or "one" does not exclude other components or parts.

[0060] It should be understood that although the terms "first" or "second" and the like can be used herein to describe various elements (such as the first magnetic conductor and the second magnetic conductor), these elements are not limited by these terms, and these terms are only used to distinguish one element from another.

[0061] The above describes the basic principles of the present application in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present application are only examples and not limitations, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present application. In addition, the above specific details are only for the purpose of example and for the purpose of understanding, and are not limited to the present application, and the above details do not limit the present application to the must-use specific details.

[0062] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electric machine comprising a rotor and a stator arranged along an extension direction of an axis of rotation, the rotor being rotatable about the axis of rotation relative to the stator, the stator comprising a stator winding and first magnetic conductors, the first magnetic conductors being located on a side of the stator winding facing away from the rotor, the stator winding comprising a plurality of energized coils arranged about the axis of rotation, characterized in that: the stator further comprises a plurality of second magnetic conductors arranged about the axis of rotation, the plurality of second magnetic conductors being located on a side of the stator winding facing the rotor, the plurality of second magnetic conductors and the plurality of energized coils respectively corresponding, each second magnetic conductor being aligned with a corresponding energized coil in a direction about the axis of rotation. a side of the first magnetic conductors facing the plurality of energized coils is provided with a plurality of protrusions, the plurality of energized coils respectively corresponding to the plurality of protrusions, each energized coil surrounding a corresponding protrusion.

2. The electric machine of claim 1, wherein, the plurality of protrusions respectively contact the plurality of second magnetic conductors.

3. The electric machine of claim 2, wherein, any two of the plurality of second magnetic conductors do not contact each other.

4. The electric machine of claim 1, wherein, defining a plane perpendicular to the axis of rotation as a projection plane, a normal projection of each second magnetic conductor on the projection plane covers a normal projection of a corresponding energized coil on the projection plane.

5. The electric machine of claim 1, wherein, the first magnetic conductors are in the form of a disc about the axis of rotation, the plurality of second magnetic conductors are in the form of a disc about the axis of rotation as a whole.

6. The electric machine of claim 1, wherein, each second magnetic conductor is in the form of a sector ring.

7. The electric machine of claim 6, wherein, defining a plane perpendicular to the axis of rotation as a projection plane, a normal projection of the first magnetic conductors on the projection plane covers normal projections of the plurality of second magnetic conductors on the projection plane.

8. The electric machine of claim 6, wherein, the plurality of energized coils are in the form of a plurality of printed circuits formed on a printed circuit board.

9. The electric machine of any one of claims 1 to 8, characterized by an impeller driven by the electric machine according to any one of claims 1 to 9.

10. An electronic water pump characterized by comprising: ​

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