CN115706460A - Motor and processing and assembling method thereof - Google Patents

Abstract

The invention discloses a motor and a processing and assembling method of the motor. The motor includes a stator and a heat transfer element, and the heat transfer element is adjacent to a stator yoke of the stator; section; the heat absorption section is set close to the axial end of the stator and can absorb heat, the heat dissipation section is set close to the middle section of the stator and can release heat, the heat absorbed by the heat absorption section at the axial end of the stator can be transferred to the The cooling section is released. The heat-absorbing section can absorb heat from the axial end of the stator at a higher temperature, and transfer the heat to the middle section of the stator with a lower temperature through the heat dissipation section of the heat transfer element, so that the overall heat of the stator is more uniform, and the axial end of the stator Reduce the temperature of the stator, alleviate the local hot spot effect at the axial end of the stator, especially at the end of the stator winding, reduce the thermal resistance of the motor, prevent the insulation failure at the end of the stator winding, ensure the performance of the motor, and help improve the torque density of the motor.

Description

Motor and motor processing and assembly method

technical field

The invention relates to the field of motors, in particular to a motor and a method for processing and assembling the motor.

Background technique

Torque density is one of the most critical performance indicators of the motor. In aerospace and other applications that are very sensitive to equipment weight and volume, the torque density of the motor will directly affect the performance of the entire system. Its importance is higher than that of current aircraft. Especially under the trend of electrification. An important bottleneck to achieve high torque density of the motor is the temperature rise of the motor. Excessive temperature of components such as winding insulation, permanent magnets, and bearings will lead to performance degradation or complete failure of the motor. In order to prevent the temperature of the key parts of the motor from being too high, on the one hand, it is necessary to control the current to control the loss of the motor, but this also means that the torque density of the motor is limited; on the other hand, it is necessary to design an efficient and reliable cooling system as much as possible, so that for the same Under the condition of loss, the temperature of the motor is reduced as much as possible.

The most commonly used cooling method for aerospace servo motors and other small-sized motors is still natural cooling. The main reason is that the reliability requirements are high in practical applications. The introduction of active cooling systems not only increases the overall volume of the motor and the internal complexity of the motor, It also increases the risk point. Especially in aerospace applications, there are often difficulties that are not easy to maintain or even impossible to maintain, which further leads to the fact that active cooling methods are rarely used. However, the biggest drawback of natural cooling is that the cooling efficiency is far inferior to active liquid cooling or air cooling, thus restricting the improvement of motor torque density. In the motor, windings are wound on the stator core of the stator, and the ends of the windings (that is, the axial ends of the stator) tend to form local hot spots of temperature. Moments have adverse effects.

Contents of the invention

The technical problem to be solved by the present invention is to provide a motor and a processing and assembling method for the motor in order to overcome the defect that local hot spots are easily formed at the winding end of the motor in the prior art and limit the torque density of the motor.

The present invention solves the above technical problems through the following technical solutions:

An electrical machine comprising a stator comprising a stator core and a stator winding, the stator core comprising stator teeth and a stator yoke, the electrical machine further comprising a heat transfer element adjacent to the stator yoke ; At least part of the heat transfer element extends along the axis direction of the motor, and the two ends of the heat transfer element along the axis direction of the motor respectively include a heat absorption section and a heat dissipation section, and the heat absorption section and the heat dissipation section segment connection;

The heat absorbing section is arranged close to the axial end of the stator and can absorb heat, the heat dissipation section is arranged close to the middle section of the stator and can release heat, and the heat absorbing section absorbs the axial end of the stator The heat of the part can be transferred to the heat dissipation section through the heat transfer element for release.

In this solution, the temperature at the end of the stator winding of the stator (that is, the axial end of the stator) is relatively high, and the temperature at the middle section of the stator is relatively low. The heat absorbing section of the heat transfer element is arranged close to the axial end of the stator (that is, close to the end of the stator winding), so that the heat absorbing section can absorb heat from the axial end of the stator at a higher temperature, and transfer the heat The heat dissipation section of the heat element is transferred to the middle section of the stator with a lower temperature, so that the overall heating of the stator is more uniform, especially the temperature at the axial end of the stator is reduced, and the local hot spot effect at the axial end of the stator, especially at the end of the stator winding, is alleviated. Reduce the thermal resistance of the motor, improve the cooling effect of the motor, prevent the insulation failure at the end of the stator winding, ensure the performance of the motor, and help improve the torque density of the motor.

Preferably, the stator yoke is provided with a first accommodating groove for accommodating the heat transfer element, the first accommodating groove extends along the axial direction of the motor, at least part of the heat dissipation section is accommodated in the first in a holding tank.

In this solution, the stator yoke is provided with the first accommodation groove for accommodating part of the heat transfer elements. On the one hand, the contact area between the heat transfer elements and the stator yoke can be increased, and the heat transfer efficiency can be improved. On the other hand, the motor The structure is more compact. And because the stator teeth of the stator are used to wind the stator winding, setting the first accommodation slot on the stator yoke can also avoid occupying the space for winding the stator winding, ensure that the slot fullness rate is as high as possible, and the length of the winding end is as short as possible, reducing the impact on the stator iron. The influence of the magnetic circuit of the core part and the overall electromagnetic performance of the motor is beneficial to the realization of high torque density of the motor.

Preferably, the stator is an external stator, and the motor further includes a casing, the inner surface of the casing is attached to the outer surface of the stator yoke, and a second receiving groove is provided on the casing;

The first accommodating groove is recessed radially inward from the outer surface of the stator, the second accommodating groove is recessed radially outward from the inner surface of the casing, one first accommodating groove and one second The accommodating grooves are located in the same circumferential direction of the motor, and the first accommodating groove cooperates with the corresponding second accommodating groove to form an accommodating cavity for accommodating the heat transfer element.

In this solution, the above arrangement can reduce the size of the first accommodation slot on the stator core, reduce the influence of opening the first accommodation slot on the electromagnetic performance, and help realize the high torque density of the motor. The heat dissipated by the heat dissipation section can be dissipated through the casing to further improve the cooling effect of the motor. The above arrangement can ensure that the heat of the heat dissipation section can be conducted to the casing with a small thermal resistance.

Preferably, along the axial direction of the motor, an end of the accommodating cavity close to the heat absorbing section passes through.

In this solution, the above arrangement enables the heat absorbing section of the heat transfer element to protrude from the axial end of the stator core, so that the heat absorbing section is closer to the end of the stator winding.

Preferably, along the axial direction of the motor, one end of the accommodating cavity close to the heat dissipation section is closed.

In this solution, the above-mentioned settings enable the heat transfer element to be quickly positioned in the axial direction of the motor during assembly, and limit the movement of the heat transfer element in the axial direction of the stator, and ensure that multiple heat transfer elements located at the same axial end of the stator The two heat transfer elements are flush in the axial direction of the motor.

Preferably, one of the first receiving slots and one of the stator teeth are located in the same circumferential direction of the motor.

In this solution, the above arrangement can reduce the influence of the heat transfer element on the magnetic circuit of the stator yoke, ensure the electromagnetic performance of the motor, and help realize the high torque density of the motor.

Preferably, the number of the stator teeth is multiple, and the plurality of stator teeth are arranged at intervals along the circumferential direction of the motor, each stator tooth is wound with the stator winding, and the heat absorbing section is set Between two adjacent stator teeth, and the heat absorbing section is located axially outside of the stator windings wound on the corresponding stator teeth.

In this solution, the above arrangement enables one heat transfer element to transfer heat to the stator windings on the two stator teeth, the heat transfer effect is higher, and the local hot spot effect at the ends of the stator windings can be better alleviated.

Preferably, the heat absorption section extends along the radial direction of the motor, the heat dissipation section extends along the axis direction of the motor, and the heat absorption end of the heat absorption section is close to the stator winding of the stator.

In this solution, the above arrangement can make the heat absorbing section of the heat transfer element closer to the stator winding with higher temperature, absorb the heat at the end of the stator winding, and alleviate the local hot spot effect at the end of the stator winding.

Preferably, the heat absorbing section is located outside the stator winding in the axial direction of the motor.

In this solution, the above settings are used to prevent the interference between the heat transfer element and the stator on the basis of making the heat absorbing section closer to the stator winding, and reduce the impact on the magnetic circuit to ensure the electromagnetic performance of the motor, which is conducive to the realization of High torque density of the motor.

Preferably, a heat-absorbing sheet is installed on the heat-absorbing section, and the cross-sectional size of the heat-absorbing sheet is larger than that of the heat-absorbing section.

In this solution, the heat-absorbing fins are used to increase the heat-absorbing area of the heat-absorbing section, which can absorb more heat from the axial end of the stator and improve the cooling effect of the axial end of the stator.

Preferably, there are multiple heat transfer elements, and at least one heat transfer element is provided at both axial ends of the stator; along the circumferential direction of the motor, all of the axial ends of the stator The heat transfer elements are arranged in a staggered manner.

In this solution, on the one hand, the above arrangement ensures that both axial ends of the stator have heat-absorbing sections for heat absorption, so that both axial ends of the stator can be fully dissipated, and on the other hand, it can also prevent The two heat transfer elements interfere with each other to ensure the reliability of heat transfer of the heat transfer elements.

Preferably, the heat transfer element is a heat pipe.

In this scheme, the heat transfer efficiency of the heat pipe is high, and the heat transfer effect is good.

A stator type permanent magnet motor, comprising a stator, the stator is an outer stator, the stator includes a stator core, a casing and a plurality of permanent magnets, the inner surface of the casing and the outer surface of the stator core Fitting, the stator core includes a plurality of stator core segments arranged at intervals along the circumferential direction of the motor, and a gap for accommodating the permanent magnet is formed between two adjacent stator core segments. The accommodating space, the permanent magnet is joined with the stator core in pieces, and the casing is provided with a plurality of permanent magnet accommodating slots arranged at intervals along the circumferential direction of the motor, and the permanent magnet accommodating slots are separated from the The inner side of the casing is recessed radially outward, and the permanent magnet accommodating groove and the corresponding permanent magnet accommodating space are in the same circumferential direction of the motor.

In this solution, a permanent magnet accommodation groove for accommodating the permanent magnet is provided on the casing to facilitate the rapid positioning of the permanent magnet, thereby facilitating the rapid positioning of the stator core segments connected with the permanent magnet, and reducing the permanent magnet and stator iron. The assembly accuracy requirements of the core block can speed up the assembly efficiency. Moreover, the permanent magnets and stator core blocks can be assembled with the casing. Since the permanent magnets and stator core blocks will be directly attached to the casing, it can also ensure the roundness of the entire stator, thereby ensuring the uniform air gap of the appliance. .

Preferably, the stator core block is a U-shaped structure with an opening facing the radial inner side of the stator; along the circumferential direction of the motor, the stator core block has two sides for forming the U-shaped structure. The first stator core segment unit and the second stator core segment unit of the wall; the width of the first stator core segment unit in the circumferential direction of the motor is greater than that of the second stator core segment unit the width of the core block unit in the circumferential direction of the motor;

For two adjacent stator core segments, the first stator core segment unit of one stator core segment and the first stator core segment unit of the other stator core segment The sub-core sub-block units are adjacent; or, the second stator core sub-block unit of one of the stator core sub-blocks and the second stator core sub-block of the other stator core sub-block The block units are adjacent.

In this scheme, the above setting is to consider the slight asymmetry of the magnetic circuit when the armature magnetic field and the permanent magnetic field act under the condition of motor load operation; on the other hand, it is to ensure that the operator has a clear reference when operating, so that the stator Iron core blocks and permanent magnets are not easy to install in the wrong position.

Preferably, the stator-type permanent magnet motor further includes a rotor, the rotor includes a rotor core and a rotor winding, the rotor core includes rotor teeth and rotor slots, and the rotor winding is an armature winding.

In this solution, the armature winding of the rotor can also generate electromagnetic torque.

A method for processing and assembling a motor, the motor includes a casing and a stator, the stator is an outer stator, the method for processing and assembling the motor is used for the motor as described above, and the method for processing and assembling the motor includes the following steps:

Installing the stator iron core and permanent magnet of the stator in the housing, and aligning the first receiving slot on the stator with the second receiving slot on the housing to form a housing for accommodating heat transfer component housing;

installing stator windings of the stator on the stator core;

The heat transfer element is placed in the accommodating cavity.

In this solution, the first receiving groove on the stator and the second receiving groove on the casing jointly accommodate the heat transfer element, so as to realize the addition of heat transfer elements without occupying other space of the motor, and ensure the compact structure of the motor. Arranging the heat transfer element on the side away from the stator winding can reduce the influence on the magnetic circuit, and it is beneficial to realize the high torque density of the motor while reducing the local hot spot effect at the end of the stator winding.

Preferably, during the process of aligning the first accommodating groove and the second accommodating groove, a sample of the heat transfer element is inserted into the accommodating cavity;

If the sample block of the heat transfer element can be inserted into the accommodation cavity, it is judged that the first accommodation groove and the second accommodation groove are aligned;

If the sample of the heat transfer element cannot be inserted into the accommodation cavity, it is judged that the first accommodation groove and the second accommodation groove are not aligned, and the position of the stator core needs to be adjusted.

In this solution, a method for judging whether the first accommodating slot is aligned with the second accommodating slot is provided, and the position of the stator core can be adjusted in time when the first accommodating slot and the second accommodating slot are not completely aligned.

Preferably, after the alignment of the first receiving groove and the second receiving groove is completed, the heat transfer element is installed to replace the sample block of the heat transfer element.

In this solution, the heat transfer element is replaced after the alignment of the first accommodation groove and the second accommodation groove is completed, which effectively prevents wear on the heat transfer element during the stator assembly process.

Preferably, after the heat transfer element is placed inside the accommodating cavity, the casing, the stator and the heat transfer element are potted.

In this solution, the above-mentioned settings are used to fill the gap between the casing, the stator and the heat transfer element, which not only can limit the movement of the heat transfer element in all directions, but more importantly, can enhance the heat conduction effect and improve the heat transfer efficiency. heat effect.

A method for processing and assembling a motor, the motor includes a casing and a stator, the stator is an outer stator, the method for processing and assembling the motor is used for the motor as described above, and the method for processing and assembling the motor includes the following steps:

A permanent magnet accommodating groove for accommodating part of the permanent magnet is provided on the casing;

Insert the permanent magnet or the sample block of the permanent magnet into the permanent magnet containing groove;

The stator core segments are inserted between two adjacent permanent magnets or samples of permanent magnets in the circumferential direction of the motor.

In this scheme, the permanent magnet or the sample block of the permanent magnet is inserted into the permanent magnet containing groove to realize the positioning of the permanent magnet relative to the casing, and then the stator core is inserted between the two permanent magnets or the sample blocks of the permanent magnet Realizing the positioning of the stator core block relative to the casing can improve the assembly efficiency of the permanent magnet and the stator core block on the one hand, and reduce the assembly accuracy requirements of the permanent magnet and the stator core block. On the other hand, since the permanent magnets and the stator core segments are directly assembled on the casing, the permanent magnets and the stator core segments will be directly attached to the casing, which can also ensure the roundness of the entire stator, thereby ensuring that the electric appliance The air gap is uniform.

Preferably, if the permanent magnet sample is inserted into the permanent magnet accommodating groove, after the stator core is installed in blocks, the permanent magnet is installed to replace the permanent magnet sample.

In this solution, the above steps are used to prevent wear to the permanent magnets during the stator core block assembly process.

On the basis of conforming to common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain preferred examples of the present invention.

The positive progress effect of the present invention is that: the heat absorption section of the heat transfer element is arranged close to the axial end of the stator (that is, close to the end of the stator winding), so that the heat absorption section can absorb the axial end of the stator at a higher temperature. The heat is transferred to the middle section of the stator with a lower temperature through the heat dissipation section of the heat transfer element, so that the overall heating of the stator is more uniform, especially the temperature at the axial end of the stator is reduced, and the axial end of the stator, especially the stator, is relieved. The local hot spot effect at the end of the winding reduces the thermal resistance of the motor, improves the cooling effect of the motor, prevents the insulation failure at the end of the stator winding, ensures the performance of the motor, and is conducive to improving the torque density of the motor. A permanent magnet accommodation groove for accommodating the permanent magnet is provided on the casing to facilitate the quick positioning of the permanent magnet, which in turn facilitates the quick positioning of the stator core block joined with the permanent magnet, reducing the assembly of the permanent magnet and the stator core block Precision requirements, speed up assembly efficiency. Moreover, the permanent magnets and stator core segments can be assembled with the casing. Since the permanent magnets and stator core segments will be directly attached to the casing, the roundness of the entire stator can also be ensured, thereby ensuring the air gap of the electrical appliance. uniform.

Description of drawings

Fig. 1 is a schematic perspective view of the three-dimensional structure of a motor with heat transfer elements in Embodiment 1 of the present invention.

Fig. 2 is a three-dimensional schematic diagram of a part of the stator structure in Embodiment 1 of the present invention.

Fig. 3 is a schematic diagram of the three-dimensional structure of the heat transfer element in Embodiment 1 of the present invention.

Fig. 4 is a schematic top view structural diagram of part of the stator core in Embodiment 1 of the present invention.

Fig. 5 is a schematic diagram of the three-dimensional structure of the motor in Embodiment 1 of the present invention after potting.

Fig. 6 is a schematic diagram of the three-dimensional structure of the motor in Embodiment 2 of the present invention.

Fig. 7 is a schematic diagram of the three-dimensional structure of the casing in Embodiment 2 of the present invention.

Fig. 8 is a three-dimensional schematic diagram of the cooperation between stator core segments and permanent magnets in Embodiment 2 of the present invention.

Fig. 9 is a schematic diagram of the installation structure of stator core segments and permanent magnets on the casing in Embodiment 2 of the present invention.

Fig. 10 is a schematic perspective view of the three-dimensional structure of the motor with heat transfer elements in Embodiment 2 of the present invention.

Fig. 11 is a schematic three-dimensional structure diagram of a stator with heat transfer elements in Embodiment 2 of the present invention.

Explanation of reference signs:

Case 1

Positioning unit 11

rotor 2

Rotor winding 21

Rotor core 22

Stator 3

Stator core 31

Stator teeth 311

Stator slot 312

Stator yoke 313

Stator core block 314

The first stator core block unit 315

The second stator core block unit 316

Stator winding 32

Heat transfer element 4

Heat absorbing section 41

transition section 42

Cooling section 43

The first receiving groove 51

Second receiving groove 52

Accommodating cavity 53

Boss 6

Heat absorber 7

Potting block 8

permanent magnet 9

Permanent magnet housing slot 10

Detailed ways

The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.

Example 1

As shown in Figures 1-5, this embodiment provides a motor, including a casing 1, a stator 3 and a rotor 2, the stator 3 includes a stator core 31 and a stator winding 32, and the stator core 31 has a plurality of stator teeth 311 , a stator slot 312 and a stator yoke 313 , a plurality of stator teeth 311 are arranged at intervals along the circumferential direction of the motor, and each stator tooth 311 is wound with a stator winding 32 . In this embodiment, a motor with an outer stator and inner rotor structure is adopted. In the radial direction of the motor, the outer surface of the stator yoke 313 is attached to the inner surface of the casing 1 . The stator winding 32 is an armature winding and is a concentrated winding, and each stator tooth 311 of the stator core 31 is wound with a stator winding 32, and each stator slot 312 is accommodated in the circumferential direction of the motor Part of the two stator windings 32 . In other alternative implementations, the stator winding 32 may also be other forms of winding.

As shown in FIGS. 1-3 , the motor also includes a heat transfer element 4, which is adjacent to the stator yoke 313, and is used to absorb heat from the axial end of the stator 3, especially the end of the stator winding 32, wherein, The axial end of the stator 3 involved in this embodiment refers to the end of the stator 3 in the axial direction of the motor, and the end of the stator winding 32 refers to the end of the stator winding 32 in the axial direction of the motor.

As shown in Figure 3, the heat transfer element 4 is a whole, at least part of the heat transfer element 4 extends along the axis direction of the motor, and the two ends of the heat transfer element 4 along the axis direction of the motor respectively include a heat absorption section 41 and a heat dissipation section 43, The heat absorption section 41 and the heat dissipation section 43 are connected as a whole through a transition section 42 . The heat-absorbing section 41 is arranged near the axial end of the stator 3 and can absorb heat. The heat-dissipating section 43 is arranged near the middle section of the stator 3 and can release heat. The heat absorbed by the heat-absorbing section 41 at the axial end of the stator 3 can be transferred The heat element 4 is transferred to the heat dissipation section 43 for release, specifically, the heat absorbed by the heat absorption section 41 at the axial end of the stator 3 is first transferred to the transition section 42, then transferred to the heat dissipation section 43 through the transition section 42, and released through the heat dissipation section 43 heat.

The temperature at the axial ends of the stator 3 (especially the ends of the stator winding 32 ) is relatively high, and the temperature at the middle section of the stator is relatively low. The heat absorbing section 41 of the heat transfer element 4 is arranged near the axial end of the stator 3 (that is, near the end of the stator winding 32), so that the heat absorbing section 41 can absorb the heat of the axial end of the stator 3 at a higher temperature, And the heat is transferred to the middle section of the lower temperature stator 3 through the heat dissipation section 43 of the heat transfer element 4, so that the whole stator 3 is heated more evenly, especially the temperature at the axial end of the stator 3 is reduced, and the axial direction of the stator 3 is relieved. The local hot spot effect at the end, especially the end of the stator winding 32, reduces the thermal resistance of the motor, improves the cooling effect, prevents the insulation failure at the end of the stator winding 32, ensures the performance of the motor, and is beneficial to improve the torque density of the motor. The heat dissipated by the cooling section 43 can be dissipated through the casing 1 to further improve the cooling effect of the motor.

As shown in Figures 1 and 2, the heat transfer element 4 in this embodiment is arranged on the side of the stator yoke 313 away from the rotor 2 in the radial direction of the motor, that is, the radially outer side of the stator yoke 313, thereby further reducing the impact on the motor. The influence of electromagnetic properties is beneficial to achieve high torque density of the motor. In other alternative embodiments, in the radial direction of the motor, the heat transfer element 4 can also be arranged on the side of the stator yoke 313 close to the rotor 2, but in order to ensure the normal rotation of the rotor 2, the heat transfer element 4 cannot Interference with the rotor 2 occurs, and in order not to affect the magnetic circuit as much as possible, the heat transfer element 4 should be arranged as close as possible to the stator yoke 313 , that is, to be arranged near the bottom of the stator slot 312 .

As shown in Figures 1 and 2, the stator yoke 313 is provided with a first accommodation groove 51 for accommodating the heat transfer element 4, the first accommodation groove 51 extends along the axis direction of the motor, at least part of the cooling section 43 is accommodated in the first accommodation slot 51, so that the cooling section 43 can be arranged close to the middle section of the stator. The stator yoke 313 is provided with a first receiving groove 51 for accommodating part of the heat transfer element 4, on the one hand, the contact area between the heat transfer element 4 and the stator yoke 313 can be increased, and the heat transfer efficiency can be improved. On the other hand, since the first receiving groove 51 is opened on the stator yoke 313, part of the heat transfer element 4 accommodated in the first receiving groove 51 takes up the space of the motor originally occupied by the stator yoke 313, thereby reducing the number of other components in the motor. The space required for placing the heat transfer element 4 makes the structure of the motor more compact. And because the stator teeth 311 are used to wind the stator winding 32, the first accommodating slot 51 is set on the stator yoke 313, which can also avoid occupying the space for winding the stator winding 32, ensure that the slot fullness rate is as high as possible, and the length of the winding end is as short as possible, reducing the The impact on the magnetic circuit of the stator core 31 and the overall electromagnetic performance of the motor is beneficial to the realization of high torque density of the motor.

As shown in Figure 1, the casing 1 is provided with a second receiving groove 52, the second containing groove 52 is recessed from the inner side of the casing 1 to the radially outer side, a first containing groove 51 and a second containing groove 52 are located In the same circumferential direction of the motor, the first accommodation groove 51 cooperates with the corresponding second accommodation groove 52 to form an accommodation chamber 53 for accommodating the heat transfer element 4 , the shape of the accommodation chamber 53 is similar to the outer contour of the heat transfer element 4 , And the size of the housing cavity 53 in the radial direction and the circumferential direction of the motor is only slightly larger than the size of the heat transfer element 4 in the radial direction and the circumferential direction of the motor, which is used to limit the movement of the heat transfer element 4 in the motor to a certain extent. radial and circumferential directions. By opening the second accommodation groove 52 on the casing 1 to cooperate with the first accommodation groove 51, the size of the first accommodation groove 51 on the stator core 31 can be reduced, and the impact on the electromagnetic performance due to the opening of the first accommodation groove 51 can be reduced. It is beneficial to realize the high torque density of the motor, and at the same time, it can ensure that the heat of the heat dissipation section 43 can be conducted to the casing 1 with a small thermal resistance.

Along the axial direction of the motor, one end of the accommodation cavity 53 close to the heat absorbing section 41 penetrates through, so that the heat absorbing section 41 of the heat transfer element 4 can protrude from the axial end of the stator core 31, so that the heat absorbing section 41 is closer to the stator winding 32 ends. The other end of the accommodating chamber 53 extends to the left and right of the middle section of the stator, so as to ensure the normal heat dissipation of the cooling section 43 . The accommodating cavity 53 is closed near the end of the heat dissipation section 43, that is, the middle section of the stator, so that the heat transfer element 4 can be quickly positioned in the axial direction of the motor during the assembly process, and the movement of the heat transfer element 4 in the axial direction of the stator 3 is restricted, and It is ensured that the plurality of heat transfer elements 4 located at the same axial end of the stator are flush in the axial direction of the motor. In other alternative implementations, both ends of the accommodating chamber 53 in the axial direction of the motor may also pass through.

As shown in Figures 1 and 2, part of the first accommodation groove 51 corresponds to the position of the stator tooth 311, and one first accommodation groove 51 and one of the stator teeth 311 are located in the same circumferential direction of the motor, and the first accommodation groove 51 and one of the stator teeth 311 are located in the same circumferential direction of the motor. The position correspondence of the stator teeth 311 can reduce the influence of the heat transfer element 4 on the magnetic circuit of the stator yoke 313 , ensure the electromagnetic performance of the motor, and help realize the high torque density of the motor.

There is also a part of the first receiving slot 51 corresponding to the position of the stator slot 312, and this part of the first receiving slot 51 is arranged between two adjacent stator teeth 311 in the circumferential direction of the motor, and makes the heat transfer element 4 absorb The hot section 41 is located between two adjacent stator windings 32, so that one heat transfer element 4 can transfer heat to the stator windings 32 on the two stator teeth 311, the heat transfer effect is higher, and the stator winding can be better alleviated. 32 local hot spot effect at the end. The heat absorbing section 41 is located axially outside of the stator winding 32 wound on the corresponding stator tooth 311 to avoid interference between the heat absorbing section 41 and the stator winding 32 .

As shown in FIG. 4 , for the above-mentioned first receiving slot 51 corresponding to the position of the stator slot 312 , a raised portion 6 is also provided at the corresponding position of the stator yoke, and the raised portion 6 corresponds to this part of the first receiving slot 51 , A protruding portion 6 and a first receiving groove 51 are located in the same circumferential direction of the motor, and the protruding direction of the protruding portion 6 is the same as the concave direction of the corresponding first accommodating groove 51. The length in the axial direction is the same as the length of the corresponding first receiving groove 51 in the axial direction of the motor. The protruding portion 6 is used to supplement the portion of the stator core 31 that is reduced due to the provision of the first accommodation slot 51 , so as to improve the electromagnetic performance and facilitate the realization of high torque density of the motor.

In this embodiment, there are two kinds of positional layouts of the first receiving slots 51 in the circumferential direction of the motor, that is, one is corresponding to the stator teeth 311 , and the other is corresponding to the stator slots 312 . In other alternative implementation manners, the two layouts can exist simultaneously or independently.

As shown in Figure 3, the heat transfer element 4 in this embodiment is an L-shaped structure, the heat absorption section 41 extends along the radial direction of the motor, the heat absorption end of the heat absorption section 41 is close to the stator winding 32, and the heat dissipation section 43 extends along the motor radial direction. Extending in the direction of the axis, the transition section 42 is bent at 90° for connecting the heat absorption section 41 and the heat dissipation section 43 . The purpose of designing the heat absorbing section 41 to extend along the radial direction of the motor is to make the heat absorbing section 41 closer to the stator winding 32 with a higher temperature, absorb the heat at the end of the stator winding 32, and alleviate the local hot spots at the end of the stator winding 32 effect. In other alternative embodiments, the heat transfer element 4 can also be designed in other shapes, such as linear.

As shown in Figures 1 and 2, the heat absorbing section 41 protrudes from the stator core 31 through one end of the first receiving groove 51, and the heat absorbing section 41 is located outside the stator winding 32 in the axial direction of the motor, so that when the absorbing On the basis that the hot section 41 is closer to the stator winding 32, the interference between the heat transfer element 4 and the stator 3 is prevented, the influence on the magnetic circuit is reduced, the electromagnetic performance of the motor is ensured, and the high torque density of the motor is realized.

The length of the heat-absorbing section 41 in the radial direction of the motor should not be too long, so as to prevent interference with the rotor 2 and affect the normal rotation of the rotor 2 . In other alternative embodiments, if the rotor 2 has rotor windings, the heat absorbing section 41 can be further extended toward the rotor 2, so that the heat absorbing end of the heat absorbing section 41 extends to the radial inner side of the air gap, close to the rotor winding , so as to realize that the heat transfer element 4 can not only alleviate the local hot spot effect at the end of the stator winding 32, but also relieve the local hot spot effect at the end of the rotor winding.

As shown in FIG. 3 , a heat-absorbing sheet 7 is installed on the heat-absorbing section 41 , and the cross-sectional size of the heat-absorbing sheet 7 is larger than that of the heat-absorbing section 41 . The heat-absorbing fins 7 are used to increase the heat-absorbing area of the heat-absorbing section 41 to absorb more heat from the axial end of the stator 3 and improve the cooling effect of the axial end of the stator 3 . The heat absorbing sheet 7 in this example is a fin, and in other alternative implementations, the heat absorbing sheet 7 can also adopt other structures that can achieve the above effects.

As shown in FIG. 1 , there are multiple heat transfer elements 4 , and a plurality of heat transfer elements 4 are provided at both axial ends of the stator 3 . Along the circumferential direction of the motor, the heat transfer elements 4 at both axial ends of the stator 3 are staggered. The parts can be fully dissipated, and on the other hand, it can also prevent the two heat transfer elements 4 at both axial ends from interfering with each other, so as to ensure the reliability of heat transfer of the heat transfer elements 4 . In other alternative implementations, the number of heat transfer elements 4 at both axial ends of the stator 3 is not fixed, and is at least one.

As shown in Figure 5, after the casing 1, the stator 3 and the heat transfer element 4 are assembled, the assembled structure needs to be potted to fill the gap between the casing 1, the stator 3 and the heat transfer element 4, Not only can the movement of the heat transfer element 4 in all directions be restricted, but more importantly, the heat conduction effect can be enhanced to improve the heat transfer effect. If the axial end of the rotor 2 needs to absorb heat, the heat absorbing section 41 of the heat transfer element 4 can protrude out of the potting rubber block 8 . It should be noted that the rotor 2 cannot be potted together, otherwise it will affect the rotation of the rotor and affect the normal operation of the motor.

The heat transfer element 4 in this embodiment is a heat pipe, and the first receiving groove 51 and the second receiving groove 52 are both semicircular. The heat pipe has high heat transfer efficiency and good heat transfer effect. In other alternative embodiments, other structures capable of achieving the above effects can also be selected as the heat transfer element 4 .

In this embodiment, the type of motor is not further limited, and the above-mentioned heat transfer element 4 can be applied to all motors including the above-mentioned stator and rotor styles, such as stator-type permanent magnet motors, rotor-type permanent magnet motors, and the like. In addition, it should at least satisfy that the heat transfer element 4 will not interfere with other structures in the motor, so as to ensure the normal operation of the motor.

This embodiment also provides a method for processing and assembling a motor, which is used for processing and assembling the above-mentioned motor. The method for processing and assembling the motor includes the following steps:

The stator core 31 and the permanent magnet of the stator 3 are installed in the housing 1, and the first receiving groove 51 on the stator 3 is aligned with the second receiving groove 52 on the housing 1 to form a housing for accommodating heat transfer elements. 4 accommodating cavity 53;

Install the stator winding 32 of the stator on the stator core 31;

The heat transfer element 4 is placed in the accommodation chamber 53 .

On the stator yoke 313 of the stator 3, a first accommodation groove 51 for accommodating part of the heat transfer element 4 is opened, and a second accommodation groove 52 for accommodating part of the heat transfer element 4 is opened on the casing 1. The first receiving groove 51 and the second receiving groove 52 on the casing 1 jointly accommodate the heat transfer element 4, and realize the addition of the heat transfer element 4 without occupying other space of the motor, so as to ensure a compact structure of the motor. Arranging the heat transfer element 4 on the side away from the stator winding 32 can reduce the impact on the magnetic circuit, and reduce the local hot spot effect at the end of the stator winding 32 while helping to achieve high torque density of the motor.

During the alignment process of the first accommodation groove 51 and the second accommodation groove 52 , a sample of the heat transfer element 4 is inserted into the accommodation chamber 53 to determine the alignment 52 of the first accommodation groove 51 and the second accommodation groove. If the sample piece of the heat transfer element 4 can be inserted into the housing chamber 53, it is judged that the first housing groove 51 and the second housing groove 52 are aligned; The slot 51 and the second receiving slot 52 are not aligned, and the position of the stator core 31 needs to be adjusted so that the first receiving slot 51 and the second receiving slot 52 are completely aligned, so that the first receiving slot 51 and the second receiving slot can be aligned. 52, adjust the position of the stator iron core 31 in time when they are not fully aligned.

After the first accommodation groove 51 and the second accommodation groove 52 are aligned, the sample block of the heat transfer element 4 is extracted from the accommodation chamber 53, and the heat transfer element 4 is inserted into the accommodation chamber 53, and the heat transfer element 4 is replaced. Sample block of heat transfer element 4. The heat transfer element 4 is replaced after the alignment of the first receiving groove 51 and the second receiving groove 52 is completed, effectively preventing wear on the heat transfer element 4 during the assembly process of the stator 3 .

Before placing the heat transfer element 4 in the housing cavity 53, first apply fixing glue on the outer surface of the heat transfer element 4, the fixing glue is used to further restrict the movement of the heat transfer element 4 in all directions to ensure the reliability of the motor . After the heat transfer element 4 is completely fixed, the casing 1 , the stator 3 and the heat transfer element 4 are potted with an insulating potting rubber block 8 . Filling the gaps between the casing 1, the stator 3 and the heat transfer element 4 can not only limit the movement of the heat transfer element 4 in all directions, but more importantly, can enhance the heat conduction effect and improve the heat transfer effect.

The heat transfer element 4 in this embodiment is not only applicable to the above-mentioned motor with an outer stator and inner rotor structure, but also applicable to a motor with an outer rotor and an inner stator structure. Since the stator 3 is not bonded to the casing 1 in the motor with the outer rotor inner stator structure, it is not necessary to set the second receiving groove 52 on the casing 1, and it is possible to directly set the stator core 31 capable of accommodating the entire heat transfer element. 4, or the second receiving groove 52 that cooperates with the first receiving groove 51 is provided on other structures that are attached to the radial inner side of the stator 3, which can be adjusted according to actual conditions.

Example 2

The structure of the motor in this embodiment is basically the same as that in Embodiment 1, the difference being that the motor in this embodiment is a stator-type permanent magnet motor, and the permanent magnet 9 is installed on one side of the stator 3 .

As shown in Figures 6-9, the motor in this embodiment is also a structure of an outer stator and an inner rotor, including a stator 3 and a rotor 2, and the stator 3 includes a stator core 31, a casing 1, and a plurality of permanent magnets 9, In the radial direction of the motor, the outer surface of the stator core 31 is attached to the inner surface of the casing 1 . The stator core 31 includes a plurality of stator core segments 314 arranged at intervals along the circumferential direction of the motor, and an accommodating space for accommodating the permanent magnet 9 is formed between two adjacent stator core segments 314 . In the circumferential direction of the motor, the permanent magnet 9 is engaged with the stator core segment 314, and the width of the permanent magnet 9 in the radial direction of the motor is slightly smaller than the width of the stator core segment 314 in the radial direction of the motor. As shown in Figure 8 , the housing 1 is provided with a plurality of permanent magnet accommodation grooves 10 arranged at intervals along the circumferential direction of the motor, the permanent magnet accommodation grooves are recessed from the inner side of the housing 1 to the radially outer side, and the permanent magnet accommodation grooves 10 The accommodating space of the corresponding permanent magnet 9 is in the same circumferential direction of the motor.

The permanent magnet accommodating groove 10 for accommodating the permanent magnet 9 is arranged on the casing 1, which facilitates the rapid positioning of the permanent magnet 9, and then facilitates the rapid positioning of the stator core block 314 engaged with the permanent magnet 9, and reduces the permanent magnet 9 and The assembly precision requirements of the stator core block 314 can speed up the assembly efficiency. The permanent magnet 9 and the stator core block 314 can be directly assembled with the casing 1. Since the permanent magnet 9 and the stator core block 314 will be directly attached to the casing 1, the roundness of the entire stator 3 can also be ensured. Degree, and then ensure that the electrical air gap is uniform.

As shown in Figure 7, the two ends of the permanent magnet accommodating groove 10 along the axial direction of the motor pass through, and the permanent magnet 9 can be pushed into the permanent magnet accommodating groove 10 through the axial ends of the casing 1, which can be applied to different types such as dovetail type. The permanent magnet accommodating groove 10 that can be inserted directly from the radial direction improves the feasibility of assembling the permanent magnet 9 and the casing 1 .

As shown in FIG. 7 , the casing 1 is provided with a plurality of positioning parts 11 arranged at intervals along the circumferential direction of the motor. The stator core 31 protrudes. The positioning part 11 is used to realize rapid positioning of the stator core segments 314 in the axial direction of the motor, and enable a plurality of stator core segments 314 to be aligned in the axial direction of the motor.

As shown in Figure 8, the stator core block 314 is a U-shaped structure with an opening facing the inner side of the stator radial direction; along the circumferential direction of the motor, the stator core block 314 has a first wall for forming the two sides of the U-shaped structure. The stator core segment unit 315 and the second stator core segment unit 316; the width of the first stator core segment unit 315 in the circumferential direction of the motor is greater than that of the second stator core segment unit 316 in the motor The width in the circumferential direction of . For two adjacent stator core segments 314, the first stator core segment unit 315 of one stator core segment 314 and the first stator core segment unit 314 of another stator core segment 315; or, the second stator core segment unit 316 of one stator core segment 314 is adjacent to the second stator core segment unit 316 of another stator core segment.

That is, for the two adjacent stator core segments 314 in the circumferential direction of the motor, the first stator core segment unit 315 and the second stator core segment unit 315 in the two stator core segments 314 The block units 316 are respectively located on different sides of the stator core block 314 in the circumferential direction. For example, for two adjacent stator core segments 314 in the circumferential direction of the motor, the first stator core segment unit 315 of one stator core segment 314 is located at the end of the stator core segment 314 On the left in the circumferential direction, the first stator core segment unit 315 of the other stator core segment 314 is located on the circumferential right of the stator core segment 314 .

On the one hand, this design method is to consider the slight asymmetry of the magnetic circuit when the armature magnetic field and the permanent magnetic field act under the load operation of the motor. On the other hand, it can also ensure that the operator has a clear reference when operating, so that the stator core is separated Blocks and permanent magnets are not easily misplaced respectively.

As shown in FIG. 10 and FIG. 11 , the motor in this embodiment also includes a heat transfer element 4 . For the specific structure and layout of the heat transfer element 4 , please refer to the relevant content in Embodiment 1. The machining and assembling method of the motor in Embodiment 1 is also applicable to this embodiment.

As shown in Figure 10, the rotor 2 includes a rotor core 22 and a rotor winding 21, the rotor core 22 includes rotor teeth and rotor slots, the rotor winding is wound on the rotor winding 21, and the rotor winding 21 in this embodiment is an armature winding , capable of generating electromagnetic torque. The heat-absorbing section 41 extends toward the rotor 2, so that the heat-absorbing end of the heat-absorbing section 41 extends to the radial inner side of the air gap, close to the rotor winding 21, so that the heat transfer element 4 can not only relieve the local hot spot at the end of the stator winding 32 effect, and can also alleviate the local hot spot effect at the end of the rotor winding 21. This embodiment also provides a method for processing and assembling a motor, which is used for processing the above-mentioned motor, and the method for processing and assembling the motor includes the following steps:

A permanent magnet accommodation groove 10 for accommodating part of the permanent magnet 9 is opened on the casing 1;

Insert the permanent magnet 9 or the sample block of the permanent magnet 9 in the permanent magnet accommodating groove 10;

The stator core segment 314 is inserted between two permanent magnets 9 or samples of permanent magnets 9 adjacent in the circumferential direction of the motor.

First insert the permanent magnet 9 or the sample block of the permanent magnet 9 into the permanent magnet accommodating groove 10 to realize the positioning of the permanent magnet 9 relative to the casing 1, and then insert the stator core block 314 into the two permanent magnets 9 or the sample of the permanent magnet 9 The positioning of the stator core block 314 relative to the casing 1 is realized between the blocks, on the one hand, the assembly efficiency of the permanent magnet 9 and the stator core block 314 can be improved, and the assembly accuracy of the permanent magnet 9 and the stator core block 314 can be reduced. Require. On the other hand, since the permanent magnet 9 and the stator core block 314 are directly assembled on the casing 1, the permanent magnet 9 and the stator core block 314 will be directly bonded to the casing 1, which can also ensure the integrity of the entire stator 3. Roundness, thereby ensuring the uniform air gap of the electrical appliance. Wherein, the sample block of the permanent magnet 9 refers to a structural member having the same shape as the permanent magnet 9, which can usually be made of metal, such as stainless steel, etc., which is wear-resistant and has a long service life.

In this embodiment, before the stator core sub-block 314 is installed, the sample block of the permanent magnet 9 is inserted into the permanent magnet accommodating groove 10. After the stator core sub-block 314 is installed, the permanent magnet 9 is installed to replace the permanent magnet 9. The sample blocks are used to prevent the wear and tear on the permanent magnet 9 during the assembly of the stator core block 314.

Before the permanent magnet 9 is inserted into the permanent magnet accommodating groove 10, a fixing glue is coated on both sides of the permanent magnet 9 along the circumferential direction of the motor, and the fixing glue can realize the relative fixing between the permanent magnet 9 and the stator core block 314 , prevent the relative movement of the two during use, and ensure the reliability of the motor.

The following is a brief description of the processing and assembling method of the stator-type permanent magnet motor with heat transfer components in this embodiment in combination with the processing and assembling methods of the above two motors:

Step 1, erect the casing 1, install the sample block of the permanent magnet 9 into the permanent magnet accommodation groove 10, and fix the sample block of the permanent magnet 9 along the radial direction of the motor through a suitable tooling, for example, by having A cylinder with a certain outer diameter withstands the sample block of the permanent magnet 9 .

Step 2: Coat the outer surface of the stator core block 314 with fixing glue and install it between two adjacent permanent magnet 9 samples along the circumferential direction of the motor.

Step 3, before the fixing glue is dry, fine-tune the stator core block 314 through tooling, so that the first accommodation groove 51 on the stator iron core block 314 and the second accommodation groove 52 on the casing 1 have a better matching accuracy High, to ensure that the subsequent heat transfer element 4 can be installed.

Step 4: Repeat the above steps, install all the stator core segments 314 on the casing 1, and wait for the fixing glue on the stator core segments 314 to solidify.

Step 5, extract the sample block of the permanent magnet 9 along the axis direction of the motor, apply fixing glue on both sides of the permanent magnet 9 along the axis direction of the motor, and place the permanent magnet 9 coated with fixing glue along the axis direction of the motor Push it into the permanent magnet accommodating groove 10, and wait for the fixing glue on the permanent magnet 9 to solidify. The length of the permanent magnet 9 in the radial direction of the motor is less than the length of the stator core segment 314 in the radial direction of the motor, so as to ensure that the permanent magnet 9 is permanently The magnet 9 is not damaged.

Step 6: After the stator core block 314 and the permanent magnet 9 are installed above, the side of the stator core 31 close to the air gap will not be completely fair, and the side of the stator core 31 close to the air gap needs to be rounded so that It meets the roundness requirement.

Step 7: Wind the stator winding 32 on the stator teeth 311 after the processing is completed.

Step 8: Apply fixing glue on the heat transfer element 4 and push the heat transfer element 4 coated with the fixing glue into the housing cavity 53 along the axis of the motor to replace the sample block of the heat transfer element 4, and wait for the heat transfer element 4 to The fixative solidifies.

Step 9: After all the installation is completed, since the heat transfer element 4 is not fully attached to the stator core 31 and the casing 1, it is necessary to perform dipping and potting at the end.

Step 10: Perform further processing on the potted stator 3, such as surface grinding, etc., and then assemble the stator 3 with other components.

In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or components must have a particular orientation, be constructed and operate in a particular orientation and therefore should not be construed as limiting the invention.

Although the specific implementation of the present invention has been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (21)

1. A motor comprising a stator, the stator comprising a stator core and a stator winding, the stator core comprising stator teeth and a stator yoke, characterized in that the motor also comprises a heat transfer element, the heat transfer element Adjacent to the stator yoke; at least part of the heat transfer element extends along the axis direction of the motor, and the two ends of the heat transfer element along the axis direction of the motor respectively include a heat absorption section and a heat dissipation section. The heat section is connected to the heat dissipation section; The heat absorbing section is arranged close to the axial end of the stator and can absorb heat, the heat dissipation section is arranged close to the middle section of the stator and can release heat, and the heat absorbing section absorbs the axial end of the stator The heat of the part can be transferred to the heat dissipation section through the heat transfer element for release. 2. The motor according to claim 1, characterized in that, the stator yoke is provided with a first accommodating groove for accommodating the heat transfer element, the first accommodating groove extends along the axial direction of the motor, At least part of the heat dissipation section is accommodated in the first accommodation slot. 3. The motor according to claim 2, wherein the stator is an outer stator, and the motor further comprises a casing, the inner surface of the casing is attached to the outer surface of the stator yoke, and the The casing is provided with a second accommodation slot; The first accommodation groove is recessed radially inward from the outer surface of the stator yoke, the second accommodation groove is recessed radially outward from the inner surface of the casing, one first accommodation groove and one second The two accommodation grooves are located in the same circumferential direction of the motor, and the first accommodation groove cooperates with the corresponding second accommodation groove to form an accommodation chamber for accommodating the heat transfer element. 4 . The motor according to claim 3 , wherein, along the axial direction of the motor, an end of the accommodating cavity close to the heat-absorbing section passes through. 5. The motor according to claim 4, characterized in that, along the axial direction of the motor, one end of the accommodating cavity close to the heat dissipation section is closed. 6 . The motor according to claim 2 , wherein one of the first receiving slots and one of the stator teeth are located in the same circumferential direction of the motor. 7. The motor according to claim 1, wherein the number of the stator teeth is multiple, a plurality of the stator teeth are arranged at intervals along the circumferential direction of the motor, and each stator tooth is wound with For the stator winding, the heat absorbing section is arranged between two adjacent stator teeth, and the heat absorbing section is located axially outside of the stator winding wound on the corresponding stator tooth. 8. The motor according to claim 1, wherein the heat-absorbing section extends along the radial direction of the motor, the heat-dissipating section extends along the axial direction of the motor, and the heat-absorbing section of the heat-absorbing section The hot end is adjacent to the stator windings of the stator. 9. The motor according to claim 8, wherein the heat absorbing section is located outside the stator winding in the axial direction of the motor. 10 . The motor according to claim 1 , wherein a heat-absorbing sheet is installed on the heat-absorbing section, and a cross-sectional size of the heat-absorbing sheet is larger than that of the heat-absorbing section. 11 . 11. The motor according to claim 1, characterized in that there are multiple heat transfer elements, and at least one heat transfer element is provided at both axial ends of the stator; along the circumferential direction of the motor direction, the heat transfer elements at both axial ends of the stator are arranged alternately. 12. The motor according to any one of claims 1-11, wherein the heat transfer element is a heat pipe. 13. A stator type permanent magnet motor, comprising a stator, the stator is an outer stator, the stator includes a stator core, a casing and a plurality of permanent magnets, the inner surface of the casing is in contact with the stator core The outer surface is bonded, the stator core includes a plurality of stator core segments arranged at intervals along the circumferential direction of the motor, and a space between two adjacent stator core segments is formed for accommodating the permanent The accommodation space of the magnet, the permanent magnet is joined with the stator core in blocks, and it is characterized in that the casing is provided with a plurality of permanent magnet accommodation grooves arranged at intervals along the circumferential direction of the motor, the The permanent magnet accommodating groove is recessed from the inner side of the casing to the radially outer side, and the permanent magnet accommodating groove and the corresponding permanent magnet accommodating space are in the same circumferential direction of the motor. 14. The stator-type permanent magnet motor according to claim 13, wherein the stator core block is a U-shaped structure with an opening facing the radial inner side of the stator; along the circumferential direction of the motor, the The stator core block has a first stator core block unit and a second stator core block unit for forming the two side walls of the U-shaped structure; the first stator core block unit is in the The width in the circumferential direction of the motor is greater than the width of the second stator core block unit in the circumferential direction of the motor; For two adjacent stator core segments, the first stator core segment unit of one stator core segment and the first stator core segment unit of the other stator core segment The sub-core sub-block units are adjacent; or, the second stator core sub-block unit of one of the stator core sub-blocks and the second stator core sub-block of the other stator core sub-block The block units are adjacent. 15. The stator type permanent magnet motor as claimed in claim 13, characterized in that, the stator type permanent magnet motor also includes a rotor, the rotor includes a rotor core and a rotor winding, and the rotor core includes rotor teeth and The rotor slot, the rotor winding is an armature winding. 16. A processing and assembling method for a motor, the motor includes a casing and a stator, and the stator is an external stator, characterized in that the processing and assembling method for the motor is used as described in any one of claims 1-15 The motor described above, the processing and assembling method of the motor comprises the following steps: Installing the stator iron core and permanent magnet of the stator in the housing, and aligning the first receiving slot on the stator with the second receiving slot on the housing to form a housing for accommodating heat transfer component housing; installing stator windings of the stator on the stator core; The heat transfer element is placed in the accommodating chamber. 17. The machining and assembling method of a motor according to claim 16, characterized in that, in the process of aligning the first receiving groove and the second receiving groove, a sample block of a heat transfer element is inserted into the receiving groove. cavity; If the sample block of the heat transfer element can be inserted into the accommodation cavity, it is judged that the first accommodation groove and the second accommodation groove are aligned; If the sample of the heat transfer element cannot be inserted into the accommodation cavity, it is judged that the first accommodation groove and the second accommodation groove are not aligned, and the position of the stator core needs to be adjusted. 18. The processing and assembling method of a motor according to claim 17, characterized in that, after the alignment of the first receiving groove and the second receiving groove is completed, the heat transfer element is installed to replace the heat transfer element sample block. 19. The processing and assembling method of a motor according to claim 16, characterized in that, after the heat transfer element is placed inside the accommodating cavity, the casing, the stator and the heat transfer element are filled seal up. 20. A processing and assembling method for a motor, the motor includes a casing and a stator, and the stator is an external stator, characterized in that the processing and assembling method for a motor is used in any one of claims 1-15 The motor described above, the processing and assembling method of the motor comprises the following steps: A permanent magnet accommodating groove for accommodating part of the permanent magnet is provided on the casing; Insert the permanent magnet or the sample block of the permanent magnet into the permanent magnet containing groove; The stator core segments are inserted between two adjacent permanent magnets or samples of permanent magnets in the circumferential direction of the motor. 21. The processing and assembling method of the motor according to claim 20, wherein if the sample block of the permanent magnet is inserted into the permanent magnet accommodating groove, after the stator core is installed in blocks, the said stator core is installed. A permanent magnet replaces the sample of permanent magnets.

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