CN211744261U

CN211744261U - Three-phase permanent magnet synchronous motor with simple and compact structure

Info

Publication number: CN211744261U
Application number: CN202020693677.9U
Authority: CN
Inventors: 陈志辉; 黄礼鑫; 王立杰; 刘一辉; 张虎
Original assignee: Xiamen Shituo Zhidong Technology Co ltd
Current assignee: Xiamen Shituo Zhidong Technology Co ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-10-23
Anticipated expiration: 2030-04-29

Abstract

The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a three-phase permanent magnet synchronous motor with simple and compact structure, which comprises a motor body and a controller for controlling the motor to run; the body comprises a machine shell and a machine cover which are detachably connected, a stator assembly and a rotor assembly are arranged in an inner space formed by combining the machine shell and the machine cover, the stator assembly is fixed on the inner side of the machine shell and arranged around the rotor assembly, the rotor assembly comprises a rotor body and an output shaft, the output shaft is fixed in the center of the rotor body in the middle, and two ends of the output shaft respectively extend out of the machine shell and the machine cover; the axial terminal surface in the cover outside is provided with the controller shell, and the controller shell is the cap body structure of opening towards the cover, and the terminal surface part of controller shell extends to inside and is used for cooperating the beam barrel that the output shaft wore out, and the controller is installed in the cavity between controller shell and beam barrel. The controller is installed in the axial space of the motor and is integrated with the motor, so that the structure is simple and compact, and the size of the motor is effectively reduced.

Description

Three-phase permanent magnet synchronous motor with simple and compact structure

Technical Field

The utility model relates to a PMSM technical field, in particular to three-phase PMSM of simple structure compactness.

Background

The conventional three-phase asynchronous motor generally has the disadvantages of high noise, low power factor, low efficiency and high energy consumption, and simultaneously increases the packaging and transportation cost due to the large volume. The permanent magnet synchronous motor is widely used due to the advantages of high power efficiency, low power factor, small heat emission, simple structure of a cooling system, small volume, small noise and the like.

Under the general condition, PMSM and controller are the separate installation, and if the motor in most electric motor cars and controller adopt the disconnect-type setting at the different positions of automobile body, need use longer cable and more plug-in components to connect between motor and the controller, this kind of mode of setting exists occupation space, wiring trouble easy mistake, low in production efficiency, cost of manufacture height etc. not enough.

In order to solve the above problems, there are currently integrated motor and controller assemblies on the market, i.e. the controller is assembled to the motor, the integrated motor comprises a motor body with an output shaft and a controller arranged on the motor body, wherein an electric connecting wire assembly is led out of the controller, the motor body comprises a stator component, a front end cover and a rear end cover, the output shaft extends out of the front end cover, the controller is arranged on the rear end cover, an electric connector is also arranged on the motor body, the electric connector is provided with a first connecting end connected with the electric connecting wire assembly and a second connecting end used for being electrically connected with a piece connected to the motor, and the first connecting end is electrically conducted with the second connecting end; according to the technical scheme, the power line assembly and the signal line assembly of the controller are integrated to the electric connector, so that the motor is compact in structure and small in installation space.

However, the combination mode of the motor and the controller in the scheme can not enable the controller to be located in a space with a waterproof function, so that the controller is easy to damp, and the controller is complex in structure and inconvenient to process and produce.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the controller in the existing integrated motor is easily affected with damp in the background art, the utility model provides a three-phase permanent magnet synchronous motor with simple and compact structure, which comprises a motor body and a controller for controlling the motor to run; the motor body comprises a machine shell and a machine cover which are detachably connected, a stator assembly and a rotor assembly which can rotate relative to the stator assembly are arranged in an inner space formed by combining the machine shell and the machine cover, the stator assembly is fixed on the inner side of the machine shell and arranged around the rotor assembly, the rotor assembly comprises a rotor body and an output shaft, the output shaft is fixed in the center of the rotor body in the middle, and two ends of the output shaft respectively extend out of the machine shell and the machine cover;

the axial terminal surface in the cover outside is provided with the controller shell, the controller shell is the opening orientation the cap body structure of cover, the terminal surface part of controller shell extends to inside and is used for the cooperation the beam barrel that the output shaft was worn out, the controller install in the controller shell with in the cavity between the beam barrel.

On the basis of the structure, a groove matched with the opening end of the controller shell is further formed in the machine cover, so that the joint of the controller shell and the machine cover is located in the groove.

On the basis of the structure, the ratio of the thickness to the diameter of the shell is less than 1/5.

In addition to the above configuration, the controller is further fixed to an end surface of an inner side of the controller case by a bolt.

On the basis of the structure, a heat dissipation rib is further arranged on the end face of the controller shell, and the heat dissipation rib corresponds to the heating element of the controller.

On the basis of the structure, a junction box is further arranged on the outer side wall of the controller shell.

On the basis of the structure, further, the shell and the cover are both provided with technical rabbets.

On the basis of the above structure, further, the controller case and the cover are connected by bolts or screws.

On the basis of the structure, furthermore, the controller shell is cylindrical, and the circuit board of the controller is annular.

On the basis of the structure, further, the inner sides of the casing and the cover are provided with reinforcing ribs, and the reinforcing ribs are of triangular net structures.

The utility model provides a pair of simple structure's three-phase PMSM compares with prior art, has following advantage:

1. the controller is arranged in the cavity between the controller shell and the shaft barrel, so that the controller can be effectively prevented from being damaged by water or dust;

2. the controller is arranged at the axial spatial position of the motor, the motor and the controller form an integrated structure in a mode of combining the casing, the cover and the controller shell, a wire harness support, a controller support, a wire and other parts for simplifying signals transmitted between the motor and the controller are omitted, the structure is simpler and more compact, the space is saved, the disassembly and the assembly are convenient, and the safety is improved;

3. when one of the motor and the controller is in failure or damage, the motor and the controller can be directly and independently taken down and replaced without replacing the whole motor and controller structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded schematic view (one) of a three-phase permanent magnet synchronous motor with a simple and compact structure provided by the present invention;

fig. 2 is an exploded schematic structural diagram (ii) of the three-phase permanent magnet synchronous motor with a simple and compact structure provided by the present invention;

fig. 3 is a schematic top view of the three-phase permanent magnet synchronous motor with a simple and compact structure provided by the present invention;

fig. 4 is a schematic perspective view of a three-phase permanent magnet synchronous motor with a simple and compact structure provided by the present invention;

FIG. 5 is a front view of a housing having a thickness to diameter ratio of less than 1/5;

fig. 6 is a left side view of fig. 5.

Reference numerals:

100 casing 110 stator assembly 120 rotor assembly

121 rotor body 122 output shaft 130 reinforcing rib

200 cover 210 recess 300 controller

310 controller shell 311 shaft tube 312 heat radiation rib

400 terminal box

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "couple" or "couples" and the like are not restricted to physical or mechanical connections, but may include electrical connections, optical connections, and the like, whether direct or indirect.

The utility model provides a three-phase permanent magnet synchronous motor with simple and compact structure, which comprises a motor body and a controller 300 for controlling the motor to run; the motor body comprises a machine shell 100 and a machine cover 200 which are detachably connected, a stator assembly 110 and a rotor assembly 120 which can rotate relative to the stator assembly 110 are arranged in an inner space formed by combining the machine shell 100 and the machine cover 200, the stator assembly 110 is fixed on the inner side of the machine shell 100 and is arranged around the rotor assembly 120, the rotor assembly 120 comprises a rotor body 121 and an output shaft 122, the output shaft 122 is centrally fixed in the center of the rotor body 121, and two ends of the output shaft respectively extend out of the machine shell 100 and the machine cover 200;

a controller shell 310 is arranged on the axial end face of the outer side of the cover 200, the controller shell 310 is of a cap structure with an opening facing the cover 200, a shaft sleeve 311 used for being matched with the output shaft 122 to penetrate out extends inwards from the end face of the controller shell 310, and the controller 300 is installed in a cavity between the controller shell 310 and the shaft sleeve 311.

In specific implementation, as shown in fig. 1 to 4, a three-phase permanent magnet synchronous motor with a simple and compact structure includes a motor body and a controller 300 for controlling the operation of the motor, wherein the motor body is electrically connected to the controller 300 through a circuit; the motor body comprises a shell 100 and a cover 200 which are detachably connected, and particularly, the shell 100 and the cover 200 are fastened and connected through bolts, so that the disassembly and the assembly are convenient;

a stator assembly 110 and a rotor assembly 120 which can rotate relative to the stator assembly 110 are arranged in an inner space formed by combining the machine shell 100 and the machine cover 200, specifically, a coil winding is arranged on the stator assembly 110, the stator assembly 110 is fixed on the inner side of the machine shell 100 and arranged around the rotor assembly 120, the rotor assembly 120 comprises a rotor body 121 and an output shaft 122, specifically, the rotor body 121 is in an oblate column shape, a permanent magnet is pasted on the rotor body 121, the output shaft 122 is centrally fixed at the center of the rotor body 121, and two ends of the output shaft respectively extend out of bearing holes on the machine shell 100 and the machine cover 200;

a controller shell 310 is arranged on the axial end face of the outer side of the cover 200, the controller shell 310 is a cap structure with an opening facing the cover 200, a shaft sleeve 311 for matching with the output shaft 122 to penetrate out extends inwards from the end face part of the controller shell 310, specifically, the shaft sleeve 311 and the controller shell 310 are integrally formed, and the controller 300 is arranged in a cavity between the controller shell 310 and the shaft sleeve 311; compared with the case 310 in which a planar through hole is directly formed on the end surface for the output shaft 122 to pass through, the controller 300 is very prone to malfunction due to water; the controller 300 is installed in a cavity between the controller housing 310 and the shaft sleeve 311, so that a fault caused by external water flowing to the controller 300 through a gap existing around the controller 310 and communicating with the outside is avoided. Therefore, the controller 300 is installed in the cavity between the controller housing 310 and the shaft sleeve 311, and the controller 300 has certain protection and waterproof functions, so that the controller is prevented from being damaged by other factors such as water, dust and the like.

The utility model provides a simple and compact three-phase permanent magnet synchronous motor, through installing the controller in the cavity between the controller shell and the shaft barrel, can effectively avoid the water or dust factor to produce the damage to the controller; install the controller in motor axial spatial position simultaneously, through the casing, the mode that cover and controller shell combined together forms the integral type structure with motor and controller, the wire harness support has been saved, the controller support, simplify spare parts such as the wire of transmission signal between motor and the controller, the structure is simpler compact, practice thrift space and convenient dismouting, the problem of connector and wire junction bump and lead to the rupture in handling has been avoided, the security has been improved, when motor and controller one of them breaks down or damages simultaneously, can directly take off its part independently and change, need not to change whole motor and controller structure.

Preferably, the cover 200 is provided with a groove 210 matching with the open end of the controller case 310, so that the joint of the controller case 310 and the cover 200 is located inside the groove 210.

In specific implementation, as shown in fig. 2 and 4, the cover 200 is provided with a groove 210 matching with the opening end of the controller housing 310, and the opening end of the controller housing 310 is embedded in the groove 210, so that the joint of the controller housing 310 and the cover 200 is located inside the groove 210, thereby further preventing water or dust factors from entering the controller housing 310 from the gap between the joint of the controller housing 310 and the cover 200 and causing the failure of the controller 300. Meanwhile, the groove 210 is in clamping fit with the opening end of the controller shell 310, so that the controller shell 310 can be positioned conveniently during installation.

Preferably, the ratio of the thickness to the diameter of the enclosure 100 is less than 1/5.

In specific implementation, as shown in fig. 5 and 6, the ratio of the thickness H to the diameter D of the casing 100 is less than 1/5, so that the overall volume of the motor is reduced on the premise of ensuring the performance of the motor.

Preferably, the controller 300 is fixed to an end surface of the inside of the controller case 310 by bolts.

During specific implementation, the controller 300 is fixed on the end face of the inner side of the controller shell 310 through bolts, so that the controller 300 is prevented from being directly connected with a motor body, the influence of vibration of the motor on the controller 300 in the operation process is reduced, and meanwhile, heat generated by the controller 300 in the operation process can be directly transmitted through the end face of the controller shell 310 to dissipate heat in time.

Preferably, a heat dissipation rib 312 is disposed on an end surface of the controller housing 310, and the heat dissipation rib 312 corresponds to a heat generating element of the controller 300.

In specific implementation, as shown in fig. 2 and 4, the end surface of the controller housing 310 is provided with a heat dissipating rib 312, and the heat dissipating rib 312 corresponds to the heating element of the controller 300, so as to further promote the heat generated by the heating element of the controller 300 to be transmitted out in time, and avoid the controller 300 being burned out due to too high temperature in the controller housing 310.

Preferably, a terminal box 400 is disposed on an outer side wall of the controller case 310.

In specific implementation, as shown in fig. 3, the junction box 400 is disposed on the outer side wall of the controller housing 310, and since the axial cross-sectional area of the controller housing 310 is smaller than the axial cross-sectional area of the cover 200, the junction box 400 is disposed on the outer side wall of the controller housing 310, so that space is fully utilized, the structure is compact, and the overall size of the motor is reduced.

Preferably, the housing 100 and the cover 200 are provided with a technical seam allowance.

During specific implementation, the process rabbets are arranged on the machine shell 100 and the machine cover 200, so that the assembly precision of the motor is ensured, the concentricity of the bearings on the machine shell 100 and the machine cover 200 is ensured, and the noise generated in the operation process of the motor is reduced.

Preferably, the controller case 310 is coupled to the set cover 200 by bolts or screws.

During specific implementation, the controller shell 310 is connected with the cover 200 through bolts or threads, so that the controller shell 310 can be conveniently mounted and dismounted, and the assembly efficiency is improved.

Preferably, the controller housing 310 has a cylindrical shape, and the circuit board of the controller 300 has a circular ring shape.

In specific implementation, as shown in fig. 1, the controller housing 310 is a cylinder, and the circuit board of the controller 300 is circular, so as to facilitate the processing and the assembly of the motor, and the appearance is more beautiful.

Preferably, reinforcing ribs 130 are disposed on the inner sides of the case 100 and the cover 200, and the reinforcing ribs 130 are in a triangular mesh structure.

In specific implementation, as shown in fig. 1 and fig. 2, the inner sides of the casing 100 and the cover 200 are both provided with the reinforcing ribs 130, the reinforcing ribs 130 are in a triangular mesh structure, the arrangement of the reinforcing ribs 130 is beneficial to improving the mechanical strength of the casing 100 and the cover 200, and the strength and the rigidity of the casing 100 and the cover 200 are enhanced under the condition that the wall thickness of the casing 100 and the cover 200 is not increased, so that the material consumption is saved, the weight is reduced, and the cost is reduced.

Although terms such as a casing, a cover, a stator assembly, a rotor body, an output shaft, a controller housing, a controller, a shaft barrel, a groove, a heat dissipating rib, a junction box, a reinforcing rib, etc., are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The three-phase permanent magnet synchronous motor with a simple and compact structure is characterized by comprising a motor body and a controller (300) for controlling the motor to operate; the motor body comprises a machine shell (100) and a machine cover (200) which are detachably connected, a stator assembly (110) and a rotor assembly (120) which can rotate relative to the stator assembly (110) are arranged in an inner space formed by combining the machine shell (100) and the machine cover (200), the stator assembly (110) is fixed on the inner side of the machine shell (100) and is arranged around the rotor assembly (120), the rotor assembly (120) comprises a rotor body (121) and an output shaft (122), the output shaft (122) is fixed in the center of the rotor body (121) in the middle, and two ends of the output shaft respectively extend out of the machine shell (100) and the machine cover (200);

be provided with controller shell (310) on the axial terminal surface in cover (200) outside, controller shell (310) are the opening orientation the cap body structure of cover (200), the terminal surface part of controller shell (310) is inside to extend and is used for the cooperation beam barrel (311) that output shaft (122) were worn out, controller (300) install in controller shell (310) with in the cavity between beam barrel (311).

2. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: the cover (200) is provided with a groove (210) matched with the opening end of the controller shell (310), so that the joint of the controller shell (310) and the cover (200) is positioned in the groove (210).

3. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: the ratio of the thickness to the diameter of the enclosure (100) is less than 1/5.

4. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: the controller (300) is fixed on the end surface of the inner side of the controller shell (310) through bolts.

5. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: the end face of the controller shell (310) is provided with heat dissipation ribs (312), and the heat dissipation ribs (312) correspond to the heating elements of the controller (300).

6. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: and a junction box (400) is arranged on the outer side wall of the controller shell (310).

7. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: the machine shell (100) and the machine cover (200) are both provided with technical rabbets.

8. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: the controller case (310) is connected with the cover (200) through bolts or threads.

9. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: the controller shell (310) is cylindrical, and a circuit board of the controller (300) is annular.

10. The three-phase permanent magnet synchronous motor with simple and compact structure according to claim 1, is characterized in that: the inboard of casing (100) and cover (200) all is equipped with strengthening rib (130), strengthening rib (130) are triangle network structure.