阅读说明：本技术 一种外转子组件及电动机 (Outer rotor assembly and motor ) 是由 沈哲 蒋彩峰 范晓晓 吴晓丹 周晓文 于 2021-08-03 设计创作，主要内容包括：本申请公开了一种外转子组件及电动机,外转子组件及电动机。该外转子组件包括转子支架,以及设置在所述转子支架上圆周阵列设置的多个磁钢组件,每个所述磁钢组件包括相对设置的第一磁钢和第二磁钢,其中,所述第一磁钢位于所述转子支架内部,所述第二磁钢贴附于所述转子支架的内壁面。能够降低磁钢的用量,降低生产成本,并提升电动机的性能。(The application discloses an outer rotor assembly and a motor, and the outer rotor assembly and the motor. The outer rotor component comprises a rotor support and a plurality of magnetic steel components arranged on the rotor support in a circumferential array mode, wherein each magnetic steel component comprises first magnetic steel and second magnetic steel which are arranged oppositely, the first magnetic steel is located inside the rotor support, and the second magnetic steel is attached to the inner wall surface of the rotor support. The usage amount of the magnetic steel can be reduced, the production cost is reduced, and the performance of the motor is improved.)

1. The utility model provides an outer rotor component, its characterized in that, includes the rotor bracket, and sets up a plurality of magnet steel components that circumference array set up on the rotor bracket, every the magnet steel component includes relative first magnet steel and the second magnet steel that sets up, wherein, first magnet steel is located inside the rotor bracket, the second magnet steel attached in the internal face of rotor bracket.

2. The external rotor assembly of claim 1, wherein the first and second magnetic steels are arranged in parallel.

3. The external rotor assembly of claim 2, wherein the rotor bracket is circumferentially arrayed with first grooves, and the rotor bracket is circumferentially arrayed with second grooves on an inner wall surface thereof, the first grooves and the second grooves are arranged in one-to-one correspondence, the first magnetic steel is embedded in the first grooves, and the second magnetic steel is embedded in the second grooves.

4. The external rotor assembly of claim 1, wherein the magnetic steel assembly further comprises a third magnetic steel disposed inside the rotor bracket, a predetermined included angle is formed between the third magnetic steel and the first magnetic steel, the predetermined included angle faces the inner ring of the rotor bracket, and the second magnetic steel is located at an opening of the predetermined included angle.

5. The external rotor assembly of claim 4, wherein the predetermined included angle is between 10 ° and 150 °.

6. The external rotor assembly of any one of claims 1-5, wherein the number of groups of magnetic steel assemblies is between 20 and 64.

7. The external rotor assembly of claim 4 or 5, wherein the first, second and third magnetic steels are rectangular or circular arc shaped in structure.

8. The external rotor assembly of claim 7, wherein at least one groove is formed in the surface of the first, second and third magnetic steels.

9. The external rotor assembly of claim 4 or 5, wherein the rotor support is provided with a magnetic isolation bridge and/or a slot, and the magnetic isolation bridge and/or the slot are located in a space region defined by the first magnetic steel, the second magnetic steel and the third magnetic steel.

10. An electric motor comprising a stator and the outer rotor assembly of any one of claims 1 to 9, the outer rotor assembly being located at an outer periphery of the stator.

Technical Field

The application relates to an outer rotor assembly and a motor, in particular to the outer rotor assembly and the motor.

Background

An electric motor is a device that converts electrical energy into mechanical energy. The electromagnetic power rotating torque is formed by utilizing an electrified coil (namely a stator winding) to generate a rotating magnetic field and acting on a rotor (such as a squirrel-cage closed aluminum frame or embedded magnetic steel).

The electric motor generally includes an inner rotor motor, which is a stator outside, and an outer rotor motor, which rotates to generate power. The external rotor motor is the opposite structure, the stator is in the middle of the motor, and the rotor is outside. The outer rotor motor has the characteristics of high efficiency, low noise, light weight, compact structure, convenience in installation and maintenance and the like, and is widely applied to the field of electric vehicles.

In the prior art, the magnetic torque and the magnetic flux are small due to the arrangement form and arrangement mode of the magnetic steel in the outer rotor, the consumption of the magnetic steel is large, the manufacturing cost of the motor is high, and the performance of the motor is low.

Disclosure of Invention

An object of this application is to provide an outer rotor subassembly and motor, can reduce the quantity of magnet steel, reduction in production cost to promote the performance of motor.

The embodiment of the application is realized as follows:

an aspect of the embodiment of the application provides an outer rotor assembly, including rotor support, and set up a plurality of magnet steel assemblies that circumference array set up on the rotor support, every the magnet steel assembly includes relative first magnet steel and the second magnet steel that sets up, wherein, first magnet steel is located inside the rotor support, the second magnet steel attached in rotor support's internal face.

Optionally, the first magnetic steel and the second magnetic steel are arranged in parallel.

Optionally, the circumference array is provided with a first groove on the rotor support, and the circumference array of the inner wall surface of the rotor support is provided with a second groove, the first groove and the second groove are arranged in a one-to-one correspondence manner, the first magnetic steel is embedded in the first groove, and the second magnetic steel is embedded in the second groove.

Optionally, the magnetic steel assembly further comprises third magnetic steel arranged inside the rotor support, a preset included angle is formed between the third magnetic steel and the first magnetic steel, the preset included angle faces towards the inner ring of the rotor support, and the second magnetic steel is located at an opening of the preset included angle.

Optionally, the preset included angle is between 10 ° and 150 °.

Optionally, the number of groups of magnetic steel assemblies is between 20 and 64.

Optionally, the first magnetic steel, the second magnetic steel and the third magnetic steel are rectangular or arc-shaped in structure.

Optionally, at least one groove is formed on the surfaces of the first magnetic steel, the second magnetic steel and the third magnetic steel.

Optionally, a magnetic isolation bridge and/or a slot are arranged on the rotor support, and the magnetic isolation bridge and/or the slot are located in a space region formed by the first magnetic steel, the second magnetic steel and the third magnetic steel in a surrounding manner.

In another aspect of the embodiments of the present application, there is provided an electric motor including a stator, and the outer rotor assembly as described in any one of the above, the outer rotor assembly being located at an outer ring of the stator.

The beneficial effects of the embodiment of the application include:

the embodiment of the application provides an outer rotor assembly and motor through the rotor bracket to and a plurality of magnet steel assemblies that circumference array set up on the rotor bracket, make stable evenly distributed's magnetism feel the line on the rotor bracket, and can guarantee the density of required magnetic flux, with the stability of guaranteeing the power that provides. Each magnetic steel component comprises a first magnetic steel and a second magnetic steel which are arranged oppositely, the first magnetic steel is positioned in the rotor bracket, and the second magnetic steel is attached to the inner wall surface of the rotor bracket. Compared with the conventional permanent magnet built-in form, the permanent magnet speed reducer is beneficial to reducing the sizes of the first magnetic steel and the second magnetic steel, can improve the utilization rate of the magnetic steel to the maximum extent, simultaneously improves the salient pole rate of the motor, and improves the output and flux weakening speed expansion capability of the motor. By taking account of the surface-mounted rotor and the built-in rotor, the optimization space is increased, and the performance and the efficiency of the motor can be optimized. By adopting the mode, for the same output power, the size of the first magnetic steel and the second magnetic steel can be reduced, so that the consumption of the magnetic steel can be reduced, and the production cost is reduced. In addition, when the sizes of the first magnetic steel and the second magnetic steel are reduced, the air gap design of the motor is more flexible and convenient, the utilization rate of the magnetic steel is improved, and the performance of the motor is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of an outer rotor assembly according to an embodiment of the present disclosure;

fig. 2 is one of schematic structural diagrams of a magnetic steel assembly provided in an embodiment of the present application;

fig. 3 is a second schematic structural diagram of a magnetic steel assembly according to an embodiment of the present application;

fig. 4 is a third schematic structural diagram of a magnetic steel assembly according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a rectangular channel provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of an arc-shaped channel steel provided in the embodiment of the present application;

fig. 7 is a schematic structural diagram of a magnetic steel assembly respectively matched with a magnetic isolation bridge and a groove provided in the embodiment of the present application.

Icon: 100-an outer rotor assembly; 110-a rotor support; 112-a first groove; 114-a second groove; 116-magnetic isolation bridge; 118-a slot; 120-a magnetic steel component; 122-first magnetic steel; 124-second magnetic steel; 126-third magnetic steel; 128-channel steel body; 1282-groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The electric motor generally includes an inner rotor motor, which is a stator outside, and an outer rotor motor, which rotates to generate power. The external rotor motor is the opposite structure, the stator is in the middle of the motor, and the rotor is outside. The outer rotor motor has the characteristics of high efficiency, low noise, light weight, compact structure, convenience in installation and maintenance and the like, and is widely applied to the field of electric vehicles. In the prior art, the magnetic torque and the magnetic flux are small due to the arrangement form and arrangement mode of the magnetic steel in the outer rotor, the consumption of the magnetic steel is large, the manufacturing cost of the motor is high, and the performance of the motor is low. To above-mentioned problem, this application provides following scheme, can reduce the quantity of magnet steel, reduction in production cost to promote the performance of motor.

Referring to fig. 1 and 2, the present embodiment provides an outer rotor assembly 100, including a rotor support 110 and a plurality of magnetic steel assemblies 120 arranged on the rotor support 110 in a circumferential array, each magnetic steel assembly 120 includes a first magnetic steel 122 and a second magnetic steel 124 arranged oppositely, wherein the first magnetic steel 122 is located inside the rotor support 110, and the second magnetic steel 124 is attached to an inner wall surface of the rotor support 110.

Specifically, rotor bracket 110 is not only used for fixing magnetic steel assembly 120, but also provides the pivoted torque for the motor, and through setting up a plurality of magnetic steel assemblies 120 on rotor bracket 110 in the circumference array, be favorable to forming the required power of rotation through magnetic steel assembly 120 and stator cooperation. It is understood that the first magnetic steel 122 and the second magnetic steel 124 in the magnetic steel assembly 120 may adopt permanent magnets to ensure stability of the provided magnetic field.

It should be noted that, in the embodiment of the present application, there is no specific limitation on the corresponding form between the first magnetic steel 122 and the second magnetic steel 124, as long as it is ensured that the first magnetic steel 122 is located inside the rotor bracket 110, and the second magnetic steel 124 is attached to the inner wall surface of the rotor bracket 110. For example, the first magnetic steel 122 and the second magnetic steel 124 may be arranged in parallel, and a certain included angle may be formed between the first magnetic steel 122 and the second magnetic steel 124, so that the required magnetic flux density can be realized.

The outer rotor assembly 100 provided by the embodiment of the application has the advantages that the rotor support 110 and the plurality of magnetic steel assemblies 120 arranged on the rotor support 110 in the circumferential array mode are used, so that the magnetic induction lines are stably and uniformly distributed on the rotor support 110, the density of required magnetic flux can be ensured, and the stability of the provided power is ensured. Each magnetic steel assembly 120 includes a first magnetic steel 122 and a second magnetic steel 124 that are disposed opposite to each other, and the first magnetic steel 122 is located inside the rotor bracket 110, and the second magnetic steel 124 is attached to an inner wall surface of the rotor bracket 110. Compared with the conventional permanent magnet built-in form, the permanent magnet built-in form is beneficial to reducing the sizes of the first magnetic steel 122 and the second magnetic steel 124, can improve the utilization rate of the magnetic steel to the maximum extent, simultaneously improves the salient pole rate of the motor, and improves the output and the flux weakening and speed expanding capability of the motor. By taking account of the surface-mounted rotor and the built-in rotor, the optimization space is increased, and the performance and the efficiency of the motor can be optimized. By adopting the above mode, for the same output power, the size of the first magnetic steel 122 and the second magnetic steel 124 can be reduced, so that the usage amount of the magnetic steel can be reduced, and the production cost is reduced. In addition, when the sizes of the first magnetic steel 122 and the second magnetic steel 124 are reduced, the air gap design of the motor is more flexible and convenient, the utilization rate of the magnetic steel is improved, and the performance of the motor is improved.

As shown in fig. 2, the first magnetic steel 122 and the second magnetic steel 124 are arranged in parallel.

Specifically, through with first magnet steel 122 and second magnet steel 124 parallel arrangement, be favorable to promoting compactness each other to reduce the required space of first magnet steel 122 of rotor bracket 110 holding and second magnet steel 124, be favorable to optimizing rotor bracket 110's structural style. In addition, the length of the first magnetic steel 122 can be larger than that of the second magnetic steel 124, and the magnetic induction lines sent out by the first magnetic steel 122 and the second magnetic steel 124 respectively are denser, so that the uniformity of magnetic distribution is improved, the stability of the motor during transmission is ensured, and the performance of the motor is improved.

As shown in fig. 2, a first groove 112 is circumferentially arranged on the rotor support 110, a second groove 114 is circumferentially arranged on the inner wall surface of the rotor support 110, the first groove 112 and the second groove 114 are arranged in a one-to-one correspondence manner, the first magnetic steel 122 is embedded in the first groove 112, and the second magnetic steel 124 is embedded in the second groove 114.

Specifically, first grooves 112 are circumferentially arranged on rotor support 110 in an array manner, so that first magnetic steel 122 is embedded in first grooves 112 to form a manner that first magnetic steel 122 is embedded in rotor support 110, wherein in order to ensure the stability of connection between first magnetic steel 122 and rotor support 110, first magnetic steel 122 and rotor support 110 can be fixed in an auxiliary manner in a glue bonding manner. Similarly, the second grooves 114 are circumferentially arranged on the inner wall surface of the rotor support 110, so that the second magnetic steel 124 is embedded in the second grooves 114 to form a form that the second magnetic steel 124 is attached to the inner wall surface of the support, wherein in order to ensure the stability of connection between the second magnetic steel 124 and the rotor support 110, the second magnetic steel 124 and the rotor support 110 can be fixed in an auxiliary manner in a glue bonding manner. Meanwhile, the second groove 114 is formed in the inner wall surface of the rotor support 110, so that when the second magnetic steel 124 is matched with the rotor support 110, the second magnetic steel 124 can be prevented from protruding out of the rotor support 110, the space utilization rate can be improved, and the connection strength can be enhanced.

As shown in fig. 3 and 4, in an alternative embodiment of the present application, the magnetic steel assembly 120 further includes a third magnetic steel 126 disposed inside the rotor bracket 110, a preset included angle is formed between the third magnetic steel 126 and the first magnetic steel 122, the preset included angle faces an inner ring of the rotor bracket 110, and the second magnetic steel 124 is located at an opening of the preset included angle.

Specifically, through add third magnet steel 126 in rotor bracket 110 is inside, be favorable to further promoting magnetic induction linear density to promote magnetic field intensity, with further promotion motor performance. When the third magnetic steel 126 is disposed in the rotor bracket 110, the first magnetic steel 122 of each magnetic steel assembly 120 corresponds to the third magnetic steel 126, and a preset included angle is formed between the first magnetic steel 122 and the third magnetic steel 126. By adopting the above form, the number of the magnetic steels is increased, and the increase of the thickness of the rotor bracket 110 is reduced, so that the utilization rate of the space is improved.

In addition, the second magnetic steel 124 is located at the opening of the preset included angle formed by the first magnetic steel 122 and the third magnetic steel 126, so that the distance between the first magnetic steel and the third magnetic steel is ensured, and the number of the magnetic steels in the unit area is increased. Therefore, a certain magnetic isolation effect can be achieved, and the problem that the magnetic flux leakage coefficient of the magnetic steel is too large and the utilization rate is too low is solved.

In an alternative embodiment of the present application, the predetermined included angle is between 10 ° and 150 °.

For example, the preset included angle may be set to a value of 135 ° or 120 °, and at this time, a V-shaped structure (the structural form shown in fig. 3) is formed between the first magnetic steel 122 and the second magnetic steel 124. When the preset included angle is set at 10 ° or 15 °, a U-shaped structure (the structural form shown in fig. 4) is formed between the first magnetic steel 122 and the second magnetic steel 124. Of course, other angles, such as 30 °, 60 °, 100 °, etc., may be provided as desired.

In an alternative embodiment of the present application, the number of sets of magnetic steel assemblies 120 is between 20 and 64.

By way of example, the array of magnetic steel assemblies 120 may be arranged at 20, 32, 64, or the like. According to the difference of the number of the groups of the magnetic steel components 120, the required size of the rotor bracket 110 may be different, and the density of the magnetic steel components 120 on the rotor bracket 110 can be set according to actual needs to ensure the stability of the motor.

As shown in fig. 5 and 6, the first magnetic steel 122, the second magnetic steel 124, and the third magnetic steel 126 have a rectangular or circular arc shape (tile shape).

Specifically, the channel steel bodies 128 of the first magnetic steel 122, the second magnetic steel 124 and the third magnetic steel 126 may adopt a rectangular structure or an arc structure, or one of them may adopt a rectangular structure or an arc structure. For example, the first magnetic steel 122 and the third magnetic steel 126 have a rectangular structure, and the second magnetic steel 124 has an arc structure. The steel magnet can be flexibly arranged according to actual needs, so long as the utilization rate of the steel magnet can be improved, and the using amount of the steel magnet is reduced.

As shown in fig. 5, at least one groove 1282 is formed on the surfaces of the first magnetic steel 122, the second magnetic steel 124, and the third magnetic steel 126.

For example, only the first magnetic steel 122 may be provided with the groove 1282, only the second magnetic steel 124 may be provided with the groove 1282, and only the third magnetic steel 126 may be provided with the groove 1282. Namely, the groove 1282 is formed in the channel steel body 128 to improve the distribution form of the magnetic induction lines, which is beneficial to improving the density of the magnetic flux and further improving the utilization rate of the magnetic steel.

As shown in fig. 7, in an alternative embodiment of the present application, a magnetic isolation bridge 116 and/or a slot 118 are disposed on the rotor support 110, and the magnetic isolation bridge 116 and/or the slot 118 are located in a spatial region enclosed by the first magnetic steel 122, the second magnetic steel 124, and the third magnetic steel 126 or in a spacing region thereof.

Specifically, the rotor bracket 110 may be provided with only the magnetic isolation bridge 116, only the slot 118, or both the magnetic isolation bridge 116 and the slot 118. The magnetic isolation bridge 116 may be disposed in a space region enclosed by the first magnetic steel 122, the second magnetic steel 124, and the third magnetic steel 126 or located in a spacing region thereof. Similarly, the slot 118 may be disposed in a space region enclosed by the first magnetic steel 122, the second magnetic steel 124, and the third magnetic steel 126 or in a spacing region thereof. The magnetic isolation bridge 116 has a principle that the magnetic flux at the magnetic bridge portion is saturated to limit the leakage flux, and therefore, the smaller the thickness of the magnetic isolation bridge 116, the better the magnetic isolation effect from the viewpoint of preventing the leakage flux. If damage to the rotor structure due to centrifugal force generated by high-speed rotation of the rotor is considered, the thickness of the magnetic isolation bridge 116 should be considered while satisfying the mechanical strength of the rotor. In addition, the slotted hole 118 is arranged on the rotor bracket 110, which can also achieve similar purposes and can be flexibly arranged according to the requirement in practical application.

The embodiment of the application also discloses an electric motor, which comprises a stator and the outer rotor assembly 100 in the embodiment. The motor includes the same structure and advantageous effects as the outer rotor assembly 100 in the foregoing embodiment. The structure and the beneficial effects of the outer rotor assembly 100 have been described in detail in the foregoing embodiments, and are not described again here.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.