CN204103619U - Motor and the motor assembly with this motor - Google Patents

Abstract

The utility model relates to a motor and a motor assembly with the motor. The motor includes a housing; a rotating shaft, which is plugged into the housing and one end of the rotating shaft protrudes from the housing; a rotor, which is arranged in the housing and sleeved On the rotating shaft, the outer wall surface of the rotor is divided into a plurality of partition surfaces extending along its axial direction and arranged at intervals along the circumferential direction, and each partition surface is formed as an arc-shaped surface protruding outward along the circumferential direction of the rotor; the magnetic steel, The magnetic steel is arranged on the rotor; the stator iron core is sleeved in the casing and arranged coaxially with the rotor, the stator iron core is a fractional slot stator iron core, and the stator iron core is provided with a And a plurality of winding grooves arranged at intervals in the circumferential direction, the winding grooves are formed as inclined grooves. The motor according to the embodiment of the utility model can effectively reduce the cogging torque ripple of the motor under no-load and load conditions, and improve the stability and reliability of the motor; The cost of line equipment is relatively low.

Description

Motor and motor assembly with the same

technical field

The utility model relates to the technical field of motors, in particular to a motor and a motor assembly with the motor.

Background technique

There are many forms of automotive steering systems, and Electric Power Steering (EPS) is one of them. EPS can be divided into three types of EPS systems according to the position of the motor assist, namely column type C-EPS, rack assist type R-EPS, and pinion assist type P-EPS. The rack-assisted R-EPS motor can directly drive the rack. The motor is coaxial with the rack and consists of a rotation angle sensor, a rotor and a stator. Compared with other EPS systems, R-EPS has the best boosting effect, the most compact structure, the shortest response time, the smallest overshoot, and the vibration noise of the motor is not easily transmitted to the driver. However, the system has high cost, high cost, and complex parts structure, and is suitable for high-power, high-load cars and luxury cars, such as Toyota Lexus, Buick Enclave, and Chevrolet Equinox.

This type of booster motor adopts a split stator core, the winding slot is a straight slot and the slot size is small, the core process of this structure is complex, the equipment precision is very high, and the equipment investment is huge.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, the utility model aims to provide a motor, the cogging torque ripple of the motor is low, and the stability and reliability of the motor operation are good.

The utility model also proposes a motor assembly with the above-mentioned motor.

The motor according to the utility model includes: a housing; a rotating shaft, the rotating shaft is plugged into the housing and one end of the rotating shaft protrudes from the housing; a rotor, the rotor is arranged in the housing and sleeved Located on the rotating shaft, the outer wall surface of the rotor is divided into a plurality of partition surfaces extending in the axial direction and spaced apart in the circumferential direction, and each of the partition surfaces is formed outward along the circumferential direction of the rotor. a protruding arc surface; magnetic steel, the magnetic steel is arranged on the rotor; and a stator iron core, the stator iron core is sleeved in the housing and arranged coaxially with the rotor, the stator iron The core is a fractional slot stator core, and the stator core is provided with a plurality of winding slots extending along its axial direction and arranged at intervals in the circumferential direction, and the winding slots are formed as inclined slots.

According to the motor of the utility model, the cogging torque ripple of the motor under no-load and load can be effectively reduced, and the stability and reliability of the motor and the components connected with the motor can be improved; at the same time, manual insertion of wires can be realized in the production process , so that the cost of developing automatic wire embedding equipment is relatively low.

In addition, the motor according to the utility model can also have the following additional technical features:

According to an embodiment of the present invention, the lower end of each winding groove is inclined by 0.3-0.8 winding grooves relative to the upper end of the winding groove, and the number of partition surfaces is 6-10.

According to an embodiment of the present invention, the rotor is provided with a plurality of magnetic steel grooves extending along its axial direction and arranged at intervals along its circumferential direction, and the magnetic steel is inserted into the magnetic steel grooves.

According to an embodiment of the present invention, one magnetic steel groove is provided in the central angle area corresponding to each partition surface.

According to an embodiment of the present invention, the perpendiculars of each magnetic steel groove extend along the radial direction of the rotor respectively.

According to an embodiment of the utility model, the rotating shaft is a solid shaft.

According to an embodiment of the present invention, one end of the rotating shaft is sleeved with a bearing, the other end of the rotating shaft is sleeved with a resolver rotor, and the rotor is arranged between the bearing and the resolver rotor. The bearing, the rotor and the resolver rotor are respectively in interference fit with the rotating shaft.

According to an embodiment of the present invention, the rotating shaft is provided with a bearing guide section, a rotor guide section and a resolver rotor guide section respectively corresponding to the bearing, the mating surface of the rotor and the mating surface of the resolver rotor. , the radial dimension of the bearing guide section is smaller than the inner diameter of the bearing, the radial dimension of the rotor guide section is smaller than the radial dimension of the outer contour of the mating surface of the rotor, and the diameter of the resolver rotor guide section The dimension is smaller than the radial dimension of the outer contour of the mating surface of the resolver rotor.

According to the motor assembly of the utility model, it includes: according to the motor of the utility model, one end of the motor is provided with a first connection part protruding from the housing; a PCB connecting plate is arranged on the One end of the motor and the PCB connection board are provided with a terminal block; a controller, the controller is connected to one end of the motor, and one end of the controller is provided with a second wiring part, and the first wiring part is connected to the The second wiring part is connected by welding.

According to an embodiment of the present invention, the first connection part and the second connection part are copper bars of three-phase lines respectively.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is a schematic structural view of a motor assembly according to an embodiment of the present invention;

Fig. 2 is a sectional view of a motor assembly according to an embodiment of the present invention;

3 is a schematic structural view of a rotor of a motor according to an embodiment of the present invention;

Fig. 4 is a structural schematic view of the rotor of the motor according to the embodiment of the present invention after being equipped with magnetic steel;

5 is a top view of a stator of a motor according to an embodiment of the present invention;

6 is a cross-sectional view of a stator of a motor according to an embodiment of the present invention;

Fig. 7 is a schematic diagram of the assembly structure of the rotating shaft and the rotor of the motor according to the embodiment of the present invention;

Fig. 8 is a side view of the assembly structure of the rotating shaft and the rotor of the motor according to the embodiment of the present invention;

Fig. 9 is a schematic structural view of a housing of a motor according to an embodiment of the present invention;

Figure 10 is a sectional view of the housing shown in Figure 9;

Fig. 11 is a schematic structural diagram of a motor according to an embodiment of the present invention;

Fig. 12 is a schematic diagram of the connection structure between the motor and the controller according to the embodiment of the present utility model.

Reference signs:

motor assembly 1;

Motor 10; Controller 20;

Housing 101; rotating shaft 102; rotor 103; partition surface 104; magnetic steel groove 105; magnetic steel 106; stator core 107; winding groove 108; bearing 109; resolver rotor 111; front end cover 112; Bearing guide section 121; rotor guide section 122; resolver rotor guide section 123; stator guide section 124; resolver stator guide section 125;

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary if the first feature is "on" or "under" the second feature indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

The motor 10 according to the embodiment of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 to 12 , the motor 10 according to the embodiment of the present invention includes a housing 101 , a rotating shaft 102 , a rotor 103 , a magnetic steel 106 and a stator core 107 .

As shown in FIG. 2 , the rotating shaft 102 can be plugged into the casing 101 and one end of the rotating shaft 102 protrudes from the casing 101 . The rotor 103 is disposed in the casing 101 and sleeved on the rotating shaft 102 , and the rotor 103 can rotate together with the rotating shaft 102 . The outer wall surface of the rotor 103 is divided into a plurality of partition surfaces 104 , and the plurality of partition surfaces 104 extend along the axial direction of the rotor 103 and are arranged at intervals along the circumferential direction of the rotor 103 . As shown in FIG. 3 , each partition surface 104 is respectively formed as an arc-shaped surface protruding outward along the circumferential direction of the rotor 103 .

The magnetic steel 106 is arranged on the rotor 103 , and the stator core 107 is sleeved in the casing 101 and arranged coaxially with the rotor 103 . The stator core 107 is a fractional slot stator core, and the stator core 107 is provided with a plurality of winding slots 108, and the plurality of winding slots 108 extend along the axial direction of the stator core 107 and are spaced apart in the circumferential direction of the stator core 107 Arrangement, as shown in FIG. 6, the winding groove 108 is formed as a slanted groove.

According to the motor 10 of the embodiment of the present invention, the stator core 107 is formed as a fractional slot stator core and a plurality of winding slots 108 of the stator core 107 are formed as inclined slots, while the outer wall of the rotor 103 is divided into a plurality of slots along the rotor 103. The arc-shaped partition surface 104 protruding outward in the circumferential direction, this design can effectively reduce the cogging torque ripple of the motor 10 under no-load and load conditions, and improve the stability and stability of the motor 10 and the components connected to the motor 10 Reliability; at the same time, manual insertion of wires can be realized in terms of production technology, so that the cost of developing automatic wire insertion equipment is relatively low, and the preparation cost of the motor 10 is low.

The motor of the related technology adopts the split stator core, the winding slot adopts a straight slot and the slot size is small, the core process of this structure is complicated, the equipment precision is very high, the equipment investment is huge, and it is not suitable for practical use. use. According to the motor 10 of the embodiment of the present invention, the fractional slot stator core 107 is adopted, and each winding slot 108 is formed as a skewed slot, and the extension direction of the winding slot 108 is inclined relative to the axis of the stator core 107. This design is not only simple in structure, requires low equipment precision, is easy to manufacture and shape, and can effectively reduce the cogging torque ripple of the motor 10 when it is unloaded or loaded, that is, it can effectively avoid the torque ripple of the motor 10 when it is running. The problem of improving the stability and reliability of the motor 10.

At the same time, when the motor 10 is applied to a steering system of an automobile, the stability and reliability of the steering system can be improved. Wherein, the working voltage of the motor 10 can be 9V-16V, and the rated working voltage can be 12V. The whole vehicle system does not need to add a booster module to increase the battery voltage. This steering system is applicable to light, medium and heavy load vehicles.

Optionally, the lower end of each winding slot 108 is inclined by 0.3-0.8 winding slots 108 relative to the upper end of the winding slot 108, that is to say, the lower end and upper end of each winding slot 108 are in the stator core The circumferential difference of 107 is 0.3-0.8 distances of winding slots 108 . For example, in a specific embodiment of the present utility model, the distance between the lower end and the upper end of each winding slot 108 is 0.5 winding slots 108 in the circumferential direction of the stator core 107 . Compared with the straight slots in the related art, the winding slot 108 can effectively reduce the cogging torque ripple of the motor 10 and make the motor 10 run more smoothly.

The number of partition surfaces 104 of the rotor 103 can be set according to specific needs, and optionally, there can be 6 to 10 partition surfaces 104 . For example, in a specific example of the present invention, eight partition surfaces 104 are formed on the rotor 103 , and the eight partition surfaces 104 are evenly distributed along the circumferential direction of the rotor 103 .

As shown in Figure 3, the rotor 103 is provided with a plurality of magnetic steel slots 105, the plurality of magnetic steel slots 105 can extend along the axial direction of the rotor 103 and are arranged at intervals along the circumferential direction of the rotor 103, the magnetic steel 106 can be inserted into the magnetic Inside the steel channel 105. In order to ensure that the magnetic steel 106 can be firmly embedded in the magnetic steel groove 105 , the magnetic steel 106 can be fixed by potting with fixing glue. Specifically, the fixing glue can be arranged between the magnetic steel 106 and the inner wall of the magnetic steel groove 105, as shown in FIG. The rotors 103 are glued together.

In the related technology, the installation method of the magnetic steel and the rotor core is a surface-mounted type, that is, the magnetic steel is attached to the outer peripheral surface of the rotor core. This structure has requirements for the strength, temperature resistance and life of the bonding material. very high. The rotor 103 of the motor 10 according to the embodiment of the present invention is provided with a plurality of magnetic steel grooves 105, so that the magnetic steel 106 can be embedded in the rotor 103, and the connection reliability between the magnetic steel 106 and the rotor 103 is greatly improved. And the assembly process is relatively simple.

As shown in FIG. 4 , the number of magnetic steel grooves 105 may be equal to the number of partition surfaces 104 , and one magnetic steel groove 105 is provided in the central angle region corresponding to each partition surface 104 . It should be noted that, here, the central angle area refers to the fan-shaped area formed by each partition surface and the axis center of the rotor 103 . Further, the perpendiculars of each magnetic steel slot 105 extend along the radial direction of the rotor 103 . That is, each magnetic steel slot 105 may extend in a direction perpendicular to the radial direction of the rotor 103 .

In the related art, the rotating shaft of the motor is a hollow shaft, and the structure of the rotating shaft is relatively complicated. In addition to ensuring machining accuracy externally, precise machining is also required internally, and the rotating shaft is difficult to process. Advantageously, the shaft 102 may be a solid shaft. The solid rotating shaft 102 can effectively reduce the processing difficulty, make the processing technology simpler, and the rotating shaft 102 is easier to process and manufacture.

As shown in Figure 2, the outer end of the rotating shaft 102 is provided with a bearing 109, the inner end of the rotating shaft 102 is provided with a resolver rotor 111, and the rotor 103 is sleeved on the rotating shaft 102 and located between the bearing 109 and the resolver rotor 111 . There may be an interference fit between the bearing 109 and the rotating shaft 102 , an interference fit between the rotor 103 and the rotating shaft 102 , and an interference fit between the resolver rotor 111 and the rotating shaft 102 . This assembly structure enables the bearing 109 , the rotor 103 and the resolver rotor 111 to be firmly fixed on the rotating shaft 102 .

Advantageously, as shown in FIGS. 7 and 8 , the shaft 102 can be provided with a bearing guide section 121 corresponding to the bearing 109, a rotor guide section 123 corresponding to the mating surface of the rotor 103, and a mating surface with the resolver rotor 111. Corresponding to the rotary rotor guide segment 123 . The radial dimension of the bearing guide section 121 is smaller than the inner diameter of the bearing 109, the radial dimension of the rotor guide section 123 is smaller than the radial dimension of the outer contour of the mating surface of the rotor 103, and the radial dimension of the resolver rotor guide section 123 is smaller than that of the resolver rotor The radial dimension of the outer contour of the mating surface of 111. That is to say, the bearing guide section 121 , the rotor guide section 123 and the resolver rotor guide section 123 can respectively adopt a clearance tolerance, specifically a small clearance tolerance.

Therefore, the rotating shaft 102 can be designed with subsection tolerance, the non-fitting section can adopt small clearance tolerance, and the mating surface can adopt interference tolerance. The advantage of this structure is that the resolver rotor 111, bearing 109 and rotor 103 can be accurately guided when press-fitting, so that the resolver rotor 111, bearing 109 and rotor 103 can be press-fitted with the rotating shaft 102 respectively, and the process High reliability and low cost.

Further, in the structural design of the motor 10 in the embodiment of the present utility model, the matching positions of other components can be designed with segmental tolerances, as shown in Figures 9 and 10, the housing 101 can be provided with a stator guide section 124 And the resolver stator guide section 125, etc., this design improves the assembly quality and efficiency, at the same time, the motor 10 of this structure is easy to maintain and repair, only need to remove the front cover screw, the rotating shaft 102 and the parts on it Low cost to take out, repair or replace. When the motor 10 is installed in the steering system of the automobile, if there is a problem with the motor 10, it is only necessary to replace the damaged parts without replacing the entire steering system, which reduces maintenance or replacement costs.

As shown in FIG. 2 , one end of the housing 101 may be provided with a front cover 112 to seal one end of the housing 101 . The front end cover 112 is sleeved on the rotating shaft 102 and located outside the bearing 109 . One end of the rotating shaft 102 protruding from the housing 10 may be provided with a small pulley 113 to be connected with other devices.

The structure and assembly process of the motor 10 according to the embodiment of the present invention are simpler, without the need for high-precision equipment for manufacturing, so the manufacturing cost is low, and the motor 10 has low cogging torque ripple under no-load and load, stable and reliable operation, and a stable structure And it is easy to disassemble and install, and the maintenance cost is low.

Referring to FIG. 1 , FIG. 11 and FIG. 12 , the motor assembly 1 according to the present invention includes a PCB connection board 130 , a controller 20 and a motor. Wherein, the motor can be the motor 10 according to the embodiment of the present utility model.

One end of the motor 10 can be provided with a first wiring portion 201 protruding from the housing 101 , the PCB connection board 130 is provided at one end of the motor 10 and the PCB connection board 130 is provided with a terminal block 131 , and the controller 20 is connected to one end of the motor 10 . One end of the controller 20 is provided with a second connection portion 132 , and the first connection portion 201 is connected to the second connection portion 132 by welding.

Thus, the motor 10 and the controller 20 can form an integrated structure, which has a compact structure, takes up little space, and improves the convenience and efficiency of assembly; meanwhile, the motor 10 and the controller 20 are connected by copper bar welding. The connection mode of the signal line adopts PCB board connection, so that there is no need to connect the motor 10 and the controller 20 through a plug and a wire harness, which effectively avoids the problem of poor connectivity caused by the poor anti-interference ability and reliability of the wire harness, and improves The reliability and electromagnetic compatibility of the motor assembly 1 are greatly shortened at the same time, the voltage drop generated by the wiring harness is further reduced, and the performance of the motor assembly 1 is improved.

Optionally, as shown in FIG. 11 and FIG. 12 , the first connection part 201 is a three-phase line copper bar, and correspondingly, the second connection part 132 may be a three-phase line copper bar. Thus, the motor assembly 1 can be formed as a three-phase motor assembly 1, wherein the motor 10 can be a three-phase AC permanent magnet synchronous motor.

Since the motor assembly 1 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the running stability of the motor assembly 1 according to the embodiment of the present invention is good.

Other configurations and operations of the motor assembly 1 implemented according to the present invention are known to those skilled in the art and will not be described in detail here.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (10)

1. a motor, is characterized in that, comprising:

Housing;

Rotating shaft, described rotating shaft is plugged in described housing and described housing is stretched out in one end of described rotating shaft;

Rotor, described rotor to be located in described housing and to be set in described rotating shaft, the outside wall surface of described rotor is divided into and multiplely axially extends and along its circumference subregion face arranged spaced apart, each described subregion face is formed as the circumference arcwall face outwardly along described rotor respectively along it;

Magnet steel, described magnet steel is located on described rotor; And

Stator core, described stator core to be set in described housing and to arrange with described rotor coaxial, described stator core is fractional-slot stator core, and described stator core is provided with and axially extends and multiple winding slots arranged spaced apart in the circumferential along it, and described winding slot is formed as skewed slot.

2. motor according to claim 1, is characterized in that, the lower end of each described winding slot is relative to upper end inclination 0.3-0.8 winding slot of this winding slot, and described subregion face is 6-10.

3. motor according to claim 1, is characterized in that, described rotor is provided with and multiplely axially extends and along its circumference magnet steel groove arranged spaced apart, described magnet steel is plugged in described magnet steel groove along it.

4. motor according to claim 3, is characterized in that, is respectively equipped with a described magnet steel groove in the central angle region that each described subregion face is corresponding.

5. motor according to claim 4, is characterized in that, the perpendicular bisector of each described magnet steel groove extends along the radial direction of described rotor respectively.

6. motor according to claim 1, is characterized in that, described rotating shaft is solid shafting.

7. motor according to claim 1, it is characterized in that, one end of described rotating shaft is arranged with bearing, the other end of described rotating shaft is arranged with and revolves change rotor, described rotor is located at described bearing and described revolving becomes between rotor, described bearing, described rotor and described in revolve become rotor respectively with described rotating shaft interference fit.

8. motor according to claim 7, it is characterized in that, described rotating shaft be provided with the mating surface of described bearing, described rotor and described in revolve the mating surface that becomes rotor corresponding respectively bearing guide section, rotor guide section and revolve and become rotor guide section, the radial dimension of described bearing guide section is less than the internal diameter of described bearing, the radial dimension of described rotor guide section is less than the radial dimension of the outline of the mating surface of described rotor, described in revolve the radial dimension that the radial dimension becoming rotor guide section is less than the outline revolving the mating surface becoming rotor.

9. a motor assembly, is characterized in that, comprising:

Motor according to any one of claim 1-8, one end of described motor is provided with first wire connecting portion of stretching out described housing;

PCB connecting plate, described PCB connecting plate is located at one end of described motor and described PCB connecting plate is provided with line bank; With

Controller, described controller is connected with one end of described motor, and one end of described controller is provided with the second wire connecting portion, and described first wire connecting portion and described second wire connecting portion are weldingly connected.

10. motor assembly according to claim 9, is characterized in that, described first wire connecting portion and the second wire connecting portion are respectively triple line copper bar.