CN115149742A - Motors and Electrical Products - Google Patents

Abstract

The embodiment of the application provides a motor and an electric product. The motor has: the motor comprises a rotor, a stator arranged opposite to the rotor in a radial direction, a bearing retainer arranged on one side of the rotor in the axial direction, a bus bar retainer arranged on one side of the bearing retainer in the axial direction, and a casing for accommodating the rotor, the stator, the bearing retainer and the bus bar retainer. Therefore, the Hall element is far away from the bus bar as far as possible, so that the electromagnetic interference generated on the Hall element by the bus bar under the condition of electrifying can be reduced, and the precision of the Hall element is improved.

Description

Motors and Electrical Products

technical field

The embodiments of the present application relate to the field of electromechanics, and in particular, to a motor and an electrical product.

Background technique

In the existing motor structure, the circuit board is located on the axial lower side of the bus bar, and a Hall element is provided on the side of the circuit board facing away from the bus bar.

It should be noted that the above description of the technical background is only for the convenience of clearly and completely describing the technical solutions of the present application and facilitating the understanding of those skilled in the art. It should not be assumed that the above-mentioned technical solutions are known to those skilled in the art simply because these solutions are described in the background section of this application.

SUMMARY OF THE INVENTION

The inventor found that in the existing structure, the Hall element is located on the radial inner side of the bus bar, so that the Hall element is relatively close to the bus bar. Accuracy affects the accuracy of the Hall element.

In order to solve the above problems, embodiments of the present application provide a motor and an electrical product.

According to an aspect of the embodiments of the present application, there is provided a motor including: a rotor, a stator arranged radially opposite to the rotor, a bearing holder on one side of the rotor in the axial direction, and a bearing holder on the bearing holder a bus bar cage on one axial side, and a case housing the rotor, the stator, the bearing cage, and the bus bar cage,

An induction magnetic ring is arranged on the side surface of the bearing cage facing the bus bar cage,

A bus bar is encapsulated in the bus bar holder, a circuit board is arranged on a side surface of the bus bar holder facing the bearing holder, and a side surface of the circuit board facing the bearing holder is arranged on the circuit board. Hall elements are arranged on the side surface,

Wherein, the Hall element and the bus bar are dislocated in the radial direction.

In some embodiments, the circuit board is located axially between the inductive magnetic ring and the bus bar.

In some embodiments, the number of the bus bars is at least three, each of the bus bars is arranged in a circumferential direction with a staggered arrangement and has a gap in the circumferential direction, and the Hall element is arranged on the circuit board to face the A position of one side surface of the bearing cage corresponding to the notch.

In some embodiments, the number of the bus bars is three, wherein the first bus bar and the second bus bar and the third bus bar are arranged at a circumferential dislocation, the second bus bar and the third bus bar Partially overlapping in the axial direction, the three bus bars are provided with a notch in the circumferential direction, and the Hall element is arranged at a position corresponding to the notch on a side surface of the circuit board facing the bearing holder.

In some embodiments, the first bus bar has two connecting terminals V-end and W-end, the second bus bar has two connecting terminals U-end and V-end, and the third bus bar has W-end and There are two connecting terminals at the U end; the gap is formed between the V end of the first bus bar and the U end of the third bus bar, and the W end of the first bus bar is connected to the second bus bar. The U end is adjacent, and the V end of the second bus bar is adjacent to the W end of the third bus bar.

In some embodiments, there are three Hall elements, corresponding to the W pole, U pole and V pole of the coil respectively, a Hall element corresponding to the W pole, a Hall element corresponding to the V pole, and a Hall element corresponding to the U pole The elements are arranged counterclockwise in the circumferential direction at positions corresponding to the notches.

In some embodiments, the three Hall elements are arranged at a radial inner side of the circuit board away from the bus bar.

According to another aspect of the embodiments of the present application, an electrical product is provided, the electrical product has the motor described in any one of the foregoing embodiments.

One of the beneficial effects of the embodiments of the present application is that: according to the embodiments of the present application, by keeping the Hall elements as far away as possible from the bus bars, the electromagnetic interference generated by the bus bars to the Hall elements under the condition of electrification can be reduced, and the Hall elements can be improved. accuracy.

With reference to the following description and drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application may be employed. It should be understood that the embodiments of the present application are not thereby limited in scope. Embodiments of the present application include many changes, modifications and equivalents within the spirit and scope of the appended claims.

Description of drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application, constitute a part of the specification, are used to illustrate the embodiments of the present application, and together with the written description, serve to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort. In the attached image:

FIG. 1 is a schematic diagram of an example of a motor according to an embodiment of the present application;

Fig. 2 is a schematic diagram of the motor shown in Fig. 1 after removing the casing and the resin part of the bus bar cage;

Fig. 3 is another schematic diagram of the motor shown in Fig. 1;

FIG. 4 is a schematic view of the motor shown in FIG. 1 after removing the resin part of the bus bar holder.

Detailed ways

The foregoing and other features of the present application will become apparent from the following description with reference to the accompanying drawings. In the specification and drawings, specific embodiments of the present application are specifically disclosed, which are indicative of some embodiments in which the principles of the present application may be employed, it being understood that the present application is not limited to the described embodiments, on the contrary, the present The application includes all modifications, variations and equivalents falling within the scope of the appended claims.

In the embodiments of this application, the term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of stated features, elements, elements or components, but do not preclude the presence or addition of one or more other features, elements, elements or components.

In the embodiments of the present application, the singular forms "a", "the", etc. may include plural forms, and should be broadly understood as "a" or "a class" rather than being limited to the meaning of "an"; in addition, the term "" The "" shall be understood to include both the singular and the plural, unless the context clearly dictates otherwise. In addition, the term "based on" should be understood as "at least in part based on..." and the term "based on" should be understood as "based at least in part on..." unless the context clearly dictates otherwise.

In addition, in the following description of the present application, for the convenience of description, the direction extending along or parallel to the central axis O of the motor is referred to as the "axial direction"; the direction from the bottom of the motor housing to the motor housing The direction of the opening of the motor housing is referred to as "above" or "upper side" or "axially upper side" or "axially one side"; the direction from the opening of the motor housing towards the bottom of the motor housing is referred to as "downward" or "Lower side" or "axial lower side" or "axial other side"; the radial direction centered on the central axis O is called "radial"; the direction close to the central axis O is called "radial inner side" ”; the direction away from the central axis O is referred to as the “radial outer side”; the direction around the central axis O is referred to as the “circumferential direction”. However, it is worth noting that these are only for the convenience of description, and do not limit the orientation of the motor during use and manufacture.

The embodiments of the embodiments of the present application will be described below with reference to the accompanying drawings.

Embodiments of the first aspect

Embodiments of the present application provide a motor.

FIG. 1 is a schematic diagram of an example of the motor according to the embodiment of the present application, showing the state of the motor being cut in the axial direction; FIG. 2 is the motor shown in FIG. 1 after removing the casing and the resin part of the bus bar holder a schematic diagram of . As shown in FIGS. 1 and 2 , the motor according to the embodiment of the present application includes a rotor 10 , a stator 20 arranged radially opposite to the rotor 10 , a bearing holder 30 located on one side in the axial direction of the rotor 10 , and a bearing holder located on the side of the rotor 10 in the axial direction. 30 A bus bar holder 40 on one side in the axial direction, and a substantially cylindrical casing 50 that accommodates the rotor 10 , the stator 20 , the bearing holder 30 , and the bus bar holder 40 .

In the embodiment of the present application, as shown in FIGS. 1 and 2 , an inductive magnetic ring M is arranged on the side surface (the upper surface in the axial direction) of the bearing cage 30 facing the bus bar cage 40 , and is held on the bus bar. A bus bar 41 is encapsulated in the frame 40 , a circuit board 42 is arranged on a side surface (axially lower side surface) of the bus bar holder 40 facing the bearing holder 30 , and a circuit board 42 faces the bearing holder 30 . The side surface (the axially lower side surface) is provided with the Hall element H.

In the embodiment of the present application, the Hall element H and the bus bar 41 are arranged in a radially staggered manner. That is, as shown in FIG. 2 , the Hall element H is not arranged at the radially inner position of the bus bar 41 , but is arranged at a distance from the radially inner position of the bus bar 41 in the circumferential direction. For example, relative to the original setting position of the Hall element H, the Hall element H is shifted by a certain distance in the circumferential direction, so that the Hall element H is no longer located radially inside the bus bar 41 . Therefore, since the Hall element H is as far as possible from the bus bar 41, when the bus bar 41 is energized, the electromagnetic interference generated by the bus bar 41 to the Hall element H is reduced, and the accuracy of the Hall element H is improved.

The above structure of the motor is only an example, and the motor may also include other conventional components, such as the bearing 60, etc. For details, reference may be made to the related art.

In some embodiments, as shown in FIG. 1 , the circuit board 42 is located between the induction magnetic ring M and the bus bar 41 in the axial direction. Therefore, due to the limited space inside the motor, by arranging the circuit board between the induction magnetic ring and the bus bar, the electromagnetic interference of the bus bar to other electronic components arranged on the circuit board after power-on is reduced, and the motor is also shortened. axial dimension.

Fig. 3 is another schematic view of the motor shown in Fig. 1, showing the state of the motor viewed from the upper side in the axial direction; Fig. 4 is a schematic view of the motor shown in Fig. 1 after removing the resin part of the bus bar holder , the motor is viewed from the upper side in the axial direction, and the arrangement position H′ of the bus bar 41 and the Hall element H is shown.

In some embodiments, as shown in FIGS. 2 and 4 , the number of bus bars 41 is at least three, each bus bar 41 is arranged in a circumferentially staggered manner and has a gap G in the circumferential direction, and the Hall element H is arranged on the circuit board 42 is a position corresponding to the notch G on the side surface (axial lower side surface) facing the bearing cage 30 .

For example, as shown in FIG. 4 , the number of bus bars 41 is three, wherein the first bus bar 41 - 1 , the second bus bar 41 - 2 and the third bus bar 41 - 3 are arranged in a circumferentially displaced position, and the second bus bar 41 - 1 is arranged in a circumferential direction. The bar 41-2 and the third bus bar 41-3 partially overlap in the axial direction, the three bus bars 41 are provided with a gap G in the circumferential direction, and the Hall element H is arranged on the side of the circuit board 42 facing the bearing holder 30 The position of the corresponding notch G of the surface (axial lower surface).

Accordingly, the Hall element H can be arranged as far as possible from the bus bar 41 , further reducing electromagnetic interference to the Hall element H when the bus bar 41 is energized, and improving the accuracy of the Hall element H.

In some embodiments, as shown in FIG. 4 , the first bus bar 41-1 has two connection terminals of V end and W end, the second bus bar 41-2 has two connection terminals of U end and V end, and the third bus bar 41-2 has two connection terminals of U end and V end. The bus bar 41-3 has two connection terminals, the W end and the U end; wherein, there is a gap G between the V end of the first bus bar 41-1 and the U end of the third bus bar 41-3, and the first bus bar 41 The W end of -1 is adjacent to the U end of the second bus bar 41-2, and the V end of the second bus bar 41-2 is adjacent to the W end of the third bus bar 41-3.

Accordingly, the above-described arrangement of the bus bars 41 can further exert the effect of reducing the electromagnetic interference generated on the Hall elements H after the bus bars 41 are energized.

In some embodiments, as shown in FIG. 4 , there are also three Hall elements H, which correspond to the W pole, U pole and V pole of the coil respectively, and are shown as Hw, Hu and Hv in FIG. 4 , wherein the corresponding W The Hall element Hw of the pole, the Hall element Hv corresponding to the V pole, and the Hall element Hu corresponding to the U pole are arranged counterclockwise in the circumferential direction at the position corresponding to the gap G.

Accordingly, the above-described arrangement of the Hall elements H can further exert the effect of reducing the electromagnetic interference generated on the Hall elements H after the bus bar 41 is energized.

In some embodiments, as shown in FIG. 1 , the Hall element H is disposed at a radially inner side of the circuit board 42 away from the bus bar 41 . For example, as shown in FIG. 4 , the Hall elements Hw, Hu and Hv are in the same circumferential direction in the circumferential direction (that is, the three Hall elements are at the same distance from the central axis O in the radial direction), and are staggered in the circumferential direction. It is radially away from the bus bar 41 .

Accordingly, the above-described arrangement of the Hall elements H can further exert the effect of reducing the electromagnetic interference generated on the Hall elements H after the bus bar 41 is energized.

In the above embodiment, the Hall element H and the bus bar 41 are located in different circumferential directions as an example (that is, the Hall element H is closer to the radial inner side relative to the radial position of the bus bar 41 ), but the present application This is not limited. For example, in some embodiments, the Hall element H and the bus bar 41 may also be located in the same circumferential direction. That is, the distance of the Hall element H from the central axis O is the same as the distance of the bus bar 41 from the central axis. As a result, since the Hall element H is disposed in the notch G formed by the bus bar 41 , the effect of reducing electromagnetic interference to the Hall element H after the bus bar 41 is energized can also be exhibited.

It should be noted that the above only exemplifies the structure of the motor related to the present application, but the present application is not limited to this, and appropriate modifications can also be made on the basis of the above embodiments. In addition, the above only exemplifies each component, but the present application is not limited to this, and the specific content of each component can also refer to related technologies; in addition, components not shown in FIG. 1 to FIG. 4 can also be added, or reduced 1 to one or more of the components in Figure 4. For other configurations and structures of the motor, reference may be made to the related art, and the description is omitted here.

According to the embodiments of the present application, by keeping the Hall element as far away as possible from the bus bar, the electromagnetic interference generated by the bus bar to the Hall element under the condition of electrification can be reduced, and the accuracy of the Hall element can be improved.

Embodiments of the Second Aspect

Embodiments of the present application provide an electrical product having the motor described in the embodiments of the first aspect. Since the structure of the motor has been described in detail in the embodiment of the first aspect, its content is incorporated herein, and the description is omitted here.

In the embodiments of the present application, the electrical product may be any electrical device provided with a motor, such as an indoor unit of an air conditioner, an outdoor unit of an air conditioner, a water dispenser, a washing machine, a sweeper, a compressor, a blower, a mixer and other household appliances, or industrial equipment such as pumps, conveyors, elevators, standard industrial general-purpose machines, wind turbines, grinders, traction motors, etc., or various information processing equipment, and can also be various parts of automobiles, such as automobile electric Power steering system, automotive sunroof adjustment parts, seat adjustment parts, transmission, brake devices, etc.

The present application has been described above with reference to the specific embodiments, but those skilled in the art should understand that these descriptions are all exemplary and do not limit the protection scope of the present application. Those skilled in the art can make various variations and modifications to the present application according to the spirit and principles of the present application, and these variations and modifications are also within the scope of the present application.

The preferred embodiments of the present application have been described above with reference to the accompanying drawings. The many features and advantages of these embodiments are apparent from this detailed description, and the appended claims are therefore intended to cover all such features and advantages of these embodiments as fall within their true spirit and scope. Furthermore, since many modifications and changes will readily occur to those skilled in the art, the embodiments of the present application are not intended to be limited to the precise structures and operations illustrated and described, but are intended to cover all suitable modifications and equivalents falling within the scope thereof thing.

Claims (8)

1. A motor, comprising: a rotor, a stator disposed to be opposed to the rotor in a radial direction, a bearing holder located on one side in an axial direction of the rotor, a bus bar holder located on one side in the axial direction of the bearing holder, and a casing accommodating the rotor, the stator, the bearing holder, and the bus bar holder,

an induction magnet ring is arranged on the surface of one side of the bearing retainer facing the bus bar retainer,

a bus bar is enclosed in the bus bar holder, a circuit board is disposed on a surface of the bus bar holder facing the bearing holder, a hall element is disposed on a surface of the circuit board facing the bearing holder,

it is characterized in that the preparation method is characterized in that,

the hall element and the bus bar are arranged in a radially displaced manner.

2. The motor of claim 1,

the circuit board is located between the induction magnetic ring and the bus bar in the axial direction.

3. The motor of claim 1,

the number of the bus bars is at least three, each bus bar is arranged in a staggered mode in the circumferential direction, a gap is reserved in the circumferential direction, and the Hall element is arranged on the surface, facing the bearing retainer, of one side of the circuit board and corresponding to the position of the gap.

4. The motor of claim 1,

the number of the bus bars is three, wherein a first bus bar, a second bus bar and a third bus bar are arranged in a staggered mode in the circumferential direction, the second bus bar and the third bus bar are partially overlapped in the axial direction, gaps are reserved in the circumferential direction on the three bus bars, and the Hall element is arranged on the circuit board at a position, corresponding to the gaps, of one side surface, facing the bearing retainer.

5. The motor of claim 4,

the first bus bar has two connecting terminals of a V end and a W end, the second bus bar has two connecting terminals of a U end and a V end, the third bus bar has two connecting terminals of a W end and a U end,

the gap is arranged between the V end of the first bus bar and the U end of the third bus bar, the W end of the first bus bar is adjacent to the U end of the second bus bar, and the V end of the second bus bar is adjacent to the W end of the third bus bar.

6. The motor according to claim 5, wherein the number of the hall elements is three, and the three hall elements correspond to a W pole, a U pole, and a V pole of the coil, respectively, and the hall element corresponding to the W pole, the hall element corresponding to the V pole, and the hall element corresponding to the U pole are disposed counterclockwise in a circumferential direction at positions corresponding to the notches.

7. The motor of claim 6, wherein the three hall elements are arranged radially inward of the circuit board away from the bus bar.

8. An electrical product, characterized in that it comprises a motor according to any one of claims 1 to 7.

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