Axial electric motor system and vehicle having the same

Abstract

The application provides an axial motor system and a vehicle with the same. The axial motor system comprises a motor main box body, wherein a shaft hole is arranged in the middle part, a first accommodating cavity and a second accommodating cavity are formed in the box body, and a cooling water channel is further formed in the inner part of the motor main box body and in the cavity wall surface of at least one of the first accommodating cavity and the second accommodating cavity. The first accommodating cavity and the second accommodating cavity are arranged in the motor main box body, a power device is arranged in the first accommodating cavity, a direct current bus capacitor is arranged in the second accommodating cavity, and the cooling water channel is formed in the cavity wall surface of at least one of the first accommodating cavity and the second accommodating cavity. In this way, the heat exchange efficiency of the cooling water channel on the direct current bus capacitor and the power device is improved, and the efficiency of the motor is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor equipment, in particular to an axial motor system and a vehicle with the same. BACKGROUND

[0002] With the rapid development of new energy vehicles, the related technology is becoming mature, and the internal space of the vehicle is becoming more and more compact. Miniaturization, light weight and integration have become the mainstream direction of the development of new energy vehicles. As the core component of new energy vehicles, the traditional separated structure of the drive motor control system has a series of disadvantages such as large space volume, complex wiring, low system reliability, poor stability, etc., which have gradually emerged and are difficult to meet the needs of the times. If the controller and the drive motor are combined into one, the space volume occupied by the drive control system in the vehicle can be effectively reduced, the manufacturing cost of the controller and the drive motor can be reduced, and the connection stability of the drive control system can be improved. However, due to the large size of the controller, the common integrated method is to integrate the controller directly above the drive motor, which cannot effectively reduce the volume of the assembly, and still leads to a bulky structure and a complex assembly structure. Moreover, the new energy products are updated rapidly at present, and the development cost of electric drive products is high. Usually, the products are designed for a specific type of power module, and when the power demand changes, the existing structure cannot be adjusted, that is, the platform application cannot be realized. SUMMARY

[0003] The main purpose of the present application is to provide a motor equipment and a vehicle with the same, so as to solve the problems of large motor space and low heat exchange efficiency in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an axial motor system is provided, comprising: a motor main box, a shaft hole is arranged in the middle of the motor main box, a first accommodating cavity and a second accommodating cavity are formed in the motor main box, the maximum distance from the first accommodating cavity to the hole center of the shaft hole is less than the minimum distance from the second accommodating cavity to the hole center of the shaft hole; a power device, the power device is arranged in the first accommodating cavity; a direct current bus capacitor, the direct current bus capacitor is arranged in the second accommodating cavity.

[0005] Further, a first annular protrusion and a second annular protrusion are arranged in the motor main box, the first annular protrusion is provided with a shaft hole, the second annular protrusion is arranged along the outer circumferential surface of the first annular protrusion, there is a gap between at least part of the outer circumferential surface of the first annular protrusion and the inner circumferential surface of the second annular protrusion to form the first accommodating cavity, there is a gap between at least part of the outer circumferential surface of the second annular protrusion and the inner circumferential surface of the motor main box to form the second accommodating cavity, and at least one of the first annular protrusion and the second annular protrusion is provided with a cooling water channel.

[0006] Further, the motor main body has a first connecting portion and a second connecting portion arranged at intervals in the motor main body, a first end of the first connecting portion is connected to the inner circumferential surface of the second annular protrusion, a second end of the first connecting portion is connected to the outer circumferential surface of the first annular protrusion, a first end of the second connecting portion is connected to the inner circumferential surface of the second annular protrusion, a second end of the second connecting portion is connected to the outer circumferential surface of the first annular protrusion, the first connecting portion and the second connecting portion divide the space between the outer circumferential surface of the first annular protrusion and the inner circumferential surface of the second annular protrusion into a first arc-shaped mounting area and a second arc-shaped mounting area, and one of the first arc-shaped mounting area and the second arc-shaped mounting area forms the first accommodating cavity.

[0007] Further, the cooling water channel includes a first water channel, a part of the first water channel is arranged along the circumferential direction of the first annular protrusion, a water inlet end of the first water channel is formed in the first connecting portion, and a water outlet end of the first water channel is formed in the second connecting portion.

[0008] Further, the cooling water channel includes a second water channel, the second water channel is arranged along the circumferential direction of the second annular protrusion, and the second water channel is in communication with the water outlet end of the first water channel.

[0009] Further, the cooling water channel further includes a third water channel, the third water channel is arranged in the second annular protrusion, an inlet end of the third water channel is in communication with the water outlet end of the second water channel, and an outlet end of the third water channel is formed on the outer surface of the motor main body, and the flow direction of the cooling liquid in the second water channel is opposite to the flow direction of the cooling liquid in the third water channel.

[0010] Further, the cooling water channel includes a fourth water channel, an inlet end of the fourth water channel is formed on the outer surface of the motor main body, and an outlet end of the fourth water channel is in communication with the water channel in the first connecting portion.

[0011] Further, the power devices are multiple, at least one of the multiple power devices is connected to the outer circumferential surface of the first annular protrusion, and / or at least one of the multiple power devices is connected to the inner circumferential surface of the second annular protrusion.

[0012] Further, the motor main body has a mounting cavity formed on one side of the shaft hole, the mounting cavity is used for mounting the stator assembly, the motor main body has a circuit board arranged on the other side of the shaft hole, and the circuit board is provided with at least one of a direct-current bus capacitor output terminal, a power device terminal, a resolver signal terminal, a three-phase alternating current terminal, and a whole vehicle signal plug connector.

[0013] According to another aspect of the present application, a vehicle is provided, which includes an axial motor system, and the axial motor system is the axial motor system described above.

[0014] The application has the advantages that the first accommodating cavity and the second accommodating cavity are arranged in the motor main box body, the power device is arranged in the first accommodating cavity, the DC bus capacitor is arranged in the second accommodating cavity, and the cooling water channel is formed in the cavity wall surface of at least one of the first accommodating cavity and the second accommodating cavity. In this way, the heat exchange efficiency of the cooling water channel on the DC bus capacitor and the power device is improved, and the efficiency of the motor is effectively improved. Moreover, the motor structure can effectively shorten the axial height of the motor, make the motor more compact, make the motor realize high integration and miniaturization design, and effectively improve the practicability of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings constituting a part of the specification of the application are used to provide further understanding of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application. In the drawings:

[0016] Figure 1 A structure schematic view of a first embodiment of an axial motor system according to the application is shown;

[0017] Figure 2 An exploded structure schematic view of a second embodiment of an axial motor system according to the application is shown;

[0018] Figure 3 A structure schematic view of a third embodiment of an axial motor system according to the application is shown;

[0019] Figure 4 A sectional structure schematic view of a fourth embodiment of an axial motor system according to the application is shown;

[0020] Figure 5 A structure schematic view of a first embodiment of main parts of an inverter according to the application is shown;

[0021] Figure 6 A structure schematic view of a first embodiment of a motor main box body cooling water channel according to the application is shown;

[0022] Figure 7 A structure schematic view of a second embodiment of a motor main box body cooling water channel according to the application is shown;

[0023] Figure 8 A structure schematic view of a first embodiment of a motor rotor according to the application is shown;

[0024] Figure 9 A structure schematic view of a first embodiment of a discrete power device according to the application is shown;

[0025] Figure 10 A structure schematic view of a first embodiment of a stator assembly according to the application is shown;

[0026] Figure 11 A structural schematic diagram of a first embodiment of a DC bus capacitor according to the present application is shown;

[0027] Figure 12 A structural schematic diagram of a first embodiment of a circuit board according to the present application is shown;

[0028] Figure 13 A structural schematic diagram of a first embodiment of a circuit board according to the present application is shown;

[0029] Figure 14 An exploded schematic diagram of a fifth embodiment of an axial motor system according to the present application is shown.

[0030] Wherein the above figures include the following reference signs:

[0031] 200, axial motor system;

[0032] 110, stator assembly; 111, motor U-phase AC terminal; 112, motor V-phase AC terminal; 113, motor W-phase AC terminal; 114, motor winding outlet terminal; 115, motor stator; 116, motor non-outlet terminal;

[0033] 120, rotor assembly; 130, rotor shaft;

[0034] 10, controller cover; 101, shaft hole; 102, first accommodating cavity; 103, second accommodating cavity; 104, first annular protrusion; 105, second annular protrusion; 106, first connecting part; 107, second connecting part;

[0035] 11, whole vehicle signal plug connector via hole;

[0036] 20, motor main box; 21, water outlet; 22, water inlet; 23, high-voltage DC positive input port; 24, high-voltage DC negative input port; 25-1, first water channel; 25-2, second water channel; 25-3, third water channel; 25-4, fourth water channel; 25-5, motor side wall water outlet drainage channel; 26, first protrusion outer side; 27, second protrusion inner side;

[0037] 30, whole vehicle signal plug connector;

[0038] 40, circuit board; 41, DC bus capacitor positive output terminal via hole; 42, DC bus capacitor negative output terminal via hole; 43, discrete power device terminal via hole; 44, resolver terminal via hole; 45, current sensor signal terminal via hole; 46, AC U-phase terminal via hole; 47, AC V-phase terminal via hole; 48, AC W-phase terminal via hole; 49, whole vehicle connector signal via hole;

[0039] 50, current sensor; 51, current sensor signal terminal;

[0040] 60, DC bus capacitor; 61, DC bus capacitor positive output terminal; 62, DC bus capacitor negative output terminal; 63, DC bus capacitor positive input terminal; 64, DC bus capacitor positive input terminal;

[0041] 70, power device; 71, power device terminal;

[0042] 80, motor resolver assembly; 82, resolver stator; 83, resolver rotor; 81, resolver signal terminal;

[0043] 90, bearing. DETAILED DESCRIPTION

[0044] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented, for example, in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] Now, exemplary embodiments according to this application will be described in greater detail by referring to the drawings. These exemplary embodiments can be implemented in various different forms, and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, and in the drawings, the thickness of layers and regions can be exaggerated for clarity, and the same reference numerals are used throughout the drawings and their description will be omitted.

[0048] In conjunction with Figures 1 to 14 As shown, according to specific embodiments of the present application, an axial motor system is provided.

[0049] Specifically, as Figure 6 The middle part of the motor main box 20 is provided with a shaft hole 101, and a first accommodating cavity 102 and a second accommodating cavity 103 are formed in the motor main box 20, and the power device 70 is included in the first accommodating cavity 102, and the DC bus capacitor 60 is included in the second accommodating cavity 103. The maximum distance from the shaft hole 101 to the hole center is less than the minimum distance from the second accommodating cavity 103 to the hole center of the shaft hole 101. At the same time, a cooling water channel is formed in the cavity wall surface of at least one of the first accommodating cavity 102 and the second accommodating cavity 103.

[0050] In this embodiment, a first accommodating cavity and a second accommodating cavity are provided in the motor main box, the power device is arranged in the first accommodating cavity, the DC bus capacitor is arranged in the second accommodating cavity, and a cooling water channel is formed in the cavity wall surface of at least one of the first accommodating cavity and the second accommodating cavity. Such arrangement improves the heat exchange efficiency of the cooling water channel for the DC bus capacitor and the power device, effectively improving the efficiency of the motor. Moreover, with this motor structure, the axial height of the motor can be effectively shortened, making the motor more compact, so that the motor realizes high integration and miniaturization design, effectively improving the practicability of the motor.

[0051] Further, as Figure 6As shown, the motor main box 20 is provided with a first annular protrusion 104 and a second annular protrusion 105, the first annular protrusion 104 is provided with a shaft hole 101, the second annular protrusion 105 extends along the outer circumferential surface of the first annular protrusion 104, and there is a gap between at least part of the outer circumferential surface of the first annular protrusion 104 and the inner circumferential surface of the second annular protrusion 105 to form a first accommodating cavity 102, and there is a gap between at least part of the outer circumferential surface of the second annular protrusion 105 and the inner circumferential surface of the motor main box 20 to form a second accommodating cavity 103, and at least one of the first annular protrusion 104 and the second annular protrusion 105 is provided with a cooling water channel. Such arrangement makes the internal structure of the motor main box 20 simple and easy to process, and the cooling water channel is arranged in the first annular protrusion 104 and the second annular protrusion 105, which can increase the heat dissipation area between the cooling water channel and the DC bus capacitor 60 and the power device 70, and effectively improve the motor performance.

[0052] Specifically, the first connecting portion 106 and the second connecting portion 107 are arranged in the motor main box 20 with a gap, the first end of the first connecting portion 106 is connected with the inner circumferential surface of the second annular protrusion 105, the second end of the first connecting portion 106 is connected with the outer circumferential surface of the first annular protrusion 104, the first end of the second connecting portion 107 is connected with the inner circumferential surface of the second annular protrusion 105, and the second end of the second connecting portion 107 is connected with the outer circumferential surface of the first annular protrusion 104, the first connecting portion 106 and the second connecting portion 107 divide the gap between the outer circumferential surface of the first annular protrusion 104 and the inner circumferential surface of the second annular protrusion 105 into a first arc-shaped mounting area and a second arc-shaped mounting area, and one of the first arc-shaped mounting area and the second arc-shaped mounting area forms the first accommodating cavity 102. The power device 70 is arranged on the first protrusion outer side 26, and according to different required power, the arrangement area of the power device 70 can be expanded on the second protrusion inner side 27, so that the power device 70 can be arranged according to the performance requirement of the motor, and the practicability of the motor is effectively improved. Preferably, the DC bus capacitor is an annular capacitor arranged in the inverter side cavity of the motor main box, and the structure can dissipate heat from the capacitor sidewall and bottom, and improve the utilization efficiency of the capacitor. Further, the first connecting portion 106 and the second connecting portion 107 can extend the cooling water channel.

[0053] Specifically, as shown in the drawings, Figure 7As shown, the cooling water channel includes a first water channel 25-1, part of the first water channel 25-1 is arranged along the circumference of the first annular protrusion 104, the water inlet end of the first water channel 25-1 is formed in the first connecting part 106, and the water outlet end of the first water channel 25-1 is formed in the second connecting part 107. Such water channel design can better cool the bearing and power device, especially for the current trend of high speed, the conventional motor speed has reached more than 18000 rpm, and the subsequent speed will be higher. The heat dissipation of the bearing is one of the problems of high speed. The scheme can effectively cool the bearing, improve the working reliability of the bearing and the efficiency of the motor system.

[0054] In another embodiment of the present application, the cooling water channel includes a second water channel 25-2, the second water channel 25-2 is opened in the second annular protrusion 105, the second water channel 25-2 is arranged along the circumference of the second annular protrusion 105, and the second water channel 25-2 is arranged in communication with the water outlet end of the first water channel 25-1. Since the required power is different, the power device 70 can be expanded in the second protrusion inside 27, and the second water channel 25-2 can better cool the power device 70 and the DC bus capacitor 60.

[0055] In order to improve the utilization rate of the capacitor, and effectively cool the DC bus capacitor 60 and the vehicle signal plug-in device 30 with the circuit board.

[0056] In another embodiment of the present application, the cooling water channel includes a third water channel 25-3 opened in the second annular protrusion 105, the inlet end of the third water channel 25-3 is in communication with the outlet end of the second water channel 25-2. The outlet end of the third water channel 25-3 is opened on the outer surface of the motor main box 20. The flow direction of the cooling liquid in the second water channel 25-2 is opposite to the flow direction of the cooling liquid in the third water channel 25-3. Since the end surface of the second annular protrusion 105 forms a support surface for mounting the DC bus capacitor 60, such arrangement can further increase the length of the cooling water channel, thereby playing a role in cooling the DC bus capacitor 60 and the power device mounted on one side of the second annular protrusion 105.

[0057] In another embodiment of the present application, the cooling water channel includes a fourth water channel 25-4, the inlet end of the fourth water channel 25-4 is opened on the outer surface of the motor main box 20, and the outlet end of the fourth water channel 25-4 is arranged in communication with the water channel in the first connecting part 106. The cooling liquid enters from the water inlet 22, flows along the motor side wall into the water channel 25-4, flows into the bearing peripheral water channel 25-1, and Figure 7 As shown, along the direction of the arrows shown in the figure, respectively flow through the second water channel 25-1, the second water channel 25-2, the third water channel, and then flow through the motor side wall water outlet drainage water channel 25-5 into the water outlet. The cooling water channel of the present embodiment has a compact layout, which makes good use of the space position of the motor main box and greatly improves the heat dissipation capacity.

[0058] In one embodiment of the present application, the power device 70 is multiple, and the multiple power devices 70 are fixed to the first protruding outer side 26 and the second protruding inner side 27 by sintering (welding, elastic compression or other available connection process), so that the axial or radial space of the motor main box 20 is not occupied. In this embodiment, the power device 70 can be a discrete power device, such as Figure 9 As shown, the power device terminal 71 is directly connected with the circuit board, which makes the motor structure layout compact, the connection convenient, facilitates the miniaturization of the motor system, and the power level of the motor system can be increased or decreased according to the number of discrete power devices to expand the power of the motor, and the product platform is facilitated.

[0059] Further, the motor main box 20 is formed with a mounting cavity on one side of the shaft hole 101, and the mounting cavity is used for mounting the stator assembly, such as Figure 10 As shown, the motor three-phase line terminal includes a motor U-phase AC terminal 111, a motor V-phase AC terminal 112 and a motor W-phase AC terminal 113, one end of which is connected with the motor winding outgoing terminal, and the other end passes through the motor main box via hole, penetrates the current sensor 50, and is connected with the circuit board, which can be welded, screwed, interference compression or other connection mode. This scheme saves the intermediate transition copper bar, reduces unnecessary heat loss, and is convenient and low in cost. And the circuit board 40 is arranged on the other side of the shaft hole 101 in the motor main box 20, as shown in Figure 12 and Figure 13 As shown, the circuit board is designed with at least one of the DC bus capacitor output terminal, the power device terminal, the resolver signal terminal 81, the three-phase AC terminal and the vehicle signal plug-in part 30 at the corresponding position of the terminal of the power device and the terminal of the DC bus capacitor 60. This arrangement can make the axial motor system more compact in the axial direction.

[0060] In this embodiment, the motor resolver signal terminal 81, the motor three-phase line, the current sensor, the power device terminal 71, the DC bus capacitor and the vehicle signal plug-in part are directly connected with the circuit board (the process can be welding, interference compression or other connection process), and the intermediate transition wire harness is cancelled, as shown in Figure 14 The entire motor system has no flexible wire harness connection, saves space, reduces cost and improves production efficiency. Of course, the motor resolver signal terminal, the motor three-phase line, the current sensor, the power device terminal, the DC bus capacitor and the vehicle signal plug-in part can also be connected with the circuit board through the wire harness. In the present application, the circuit board integrates the driving, control and conduction functions, and is directly connected with the motor resolver signal terminal, the motor three-phase line, the current sensor, the power device terminal, the DC bus capacitor and the vehicle signal plug-in part, which greatly reduces the number of motor system components, deeply integrates the structure, is more compact and convenient to assemble, is reliable in connection, and reduces the use cost.

[0061] In the prior art, the resolver is mostly in the form of a wire winding scheme, and the flexible wire is connected. In the embodiment, the rigid pin type wire outlet mode is preferred, the resolver signal terminal 81 is directly connected with the circuit board, there is no intermediate transition wire bundle and connector, the signal interference is small, the cost is low, the assembly is convenient and the precision is high. Of course, as for the whole motor system, the resolver signal can also be selected in other connection schemes.

[0062] In another embodiment of the present application, as shown in Figure 4 、 Figure 5 and Figure 8 , the axial motor system further comprises a motor resolver assembly 80, the motor resolver assembly 80 comprises a resolver stator 82 and a resolver rotor 83, the maximum distance from the resolver rotor 83 to the hole center of the shaft hole is less than the minimum distance from the resolver stator 82 to the hole center of the shaft hole. Wherein, the resolver rotor 83 is connected with the rotor shaft 130, the resolver stator 82 is arranged along the outer periphery of the resolver rotor 83 and located in the motor main body.

[0063] As shown in Figure 1 , the structure schematic diagram of the axial motor system 200 of the present application is shown, 21 is the water outlet of the cooling water channel, 22 is the water inlet of the cooling water channel, 23 is the high-voltage direct-current positive input port, 24 is the high-voltage direct-current negative input port, as shown in Figure 2 , 11 is the whole vehicle signal connector via hole, 90 is the bearing. Wherein, the stator assembly comprises a stator assembly 110 and a rotor assembly 120, and a rotor shaft 130.

[0064] As shown in Figure 3 , 51 is the current sensor signal terminal. As shown in Figure 5 , 61 is the direct-current bus capacitor positive output terminal, 62 is the direct-current bus capacitor negative output terminal, 63 is the direct-current bus capacitor positive input terminal, 64 is the direct-current bus capacitor positive input terminal.

[0065] As shown in Figure 10 , 114 is the motor winding wire outlet end; 115 is the motor stator; 116 is the motor non-wire outlet end,

[0066] As shown in Figure 12 and Figure 13 , 41 is the direct-current bus capacitor positive output terminal via hole, 42 is the direct-current bus capacitor negative output terminal via hole, 43 is the discrete power device terminal via hole, 44 is the resolver terminal via hole, 45 is the current sensor signal terminal via hole, 46 is the alternating-current U-phase terminal via hole, 47 is the alternating-current V-phase terminal via hole, 48 is the alternating-current W-phase terminal via hole, and 49 is the whole vehicle connector signal via hole.

[0067] The axial motor system in the above embodiments can be used in the field of vehicle technology, i.e. according to another aspect of the present application, a vehicle is provided, comprising an axial motor system, which is the axial motor system described above. This system can reduce the space occupied by the drive control system in the vehicle and reduce the mass of the drive control system.

[0068] It can be seen that the present application achieves the following technical effects: saving space, reducing cost, and improving production efficiency. A high-integration, small-size, and low-cost motor system is achieved.

[0069] For the convenience of description, spatial relative terms such as "above", "upper", "upper surface", "upper", etc. can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0070] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", and the like mentioned in the specification refer to specific features, structures, or characteristics described in connection with the embodiment, which are included in at least one embodiment generally described in the application. The same expression appears in several places in the specification does not necessarily refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in connection with any embodiment, it is claimed that the implementation of such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present application.

[0071] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0072] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An axial motor system, characterized by The application relates to a motor main box (20) provided with a shaft hole (101) in the middle part, a first accommodating cavity (102) and a second accommodating cavity (103) formed in the motor main box (20), the maximum distance from the first accommodating cavity (102) to the hole center of the shaft hole (101) is smaller than the minimum distance from the second accommodating cavity (103) to the hole center of the shaft hole (101). A power device (70) is arranged in the first accommodating cavity (102). A direct-current bus capacitor (60) is arranged in the second accommodating cavity (103). The motor main box (20) is further provided with a cooling water channel formed in the cavity wall surface of at least one of the first accommodating cavity (102) and the second accommodating cavity (103). The motor main box (20) is provided with a first annular protrusion (104) and a second annular protrusion (105), the first annular protrusion (104) is provided with the shaft hole (101), the second annular protrusion (105) is arranged along the outer circumferential surface of the first annular protrusion (104), the outer circumferential surface of at least part of the first annular protrusion (104) and the inner circumferential surface of the second annular protrusion (105) are spaced apart to form the first accommodating cavity (102), the outer circumferential surface of at least part of the second annular protrusion (105) and the inner circumferential surface of the motor main box (20) are spaced apart to form the second accommodating cavity (103), and at least one of the first annular protrusion (104) and the second annular protrusion (105) is provided with the cooling water channel. The first connecting part (106) and the second connecting part (107) are arranged in the motor main box (20) in a spaced manner, the first end of the first connecting part (106) is connected with the inner circumferential surface of the second annular protrusion (105), the second end of the first connecting part (106) is connected with the outer circumferential surface of the first annular protrusion (104), the first end of the second connecting part (107) is connected with the inner circumferential surface of the second annular protrusion (105), the second end of the second connecting part (107) is connected with the outer circumferential surface of the first annular protrusion (104), and the first connecting part (106) and the second connecting part (107) divide the outer circumferential surface of the first annular protrusion (104) and the inner circumferential surface of the second annular protrusion (105) into a first arc-shaped mounting area and a second arc-shaped mounting area, wherein one of the first arc-shaped mounting area and the second arc-shaped mounting area forms the first accommodating cavity (102).

2. The axial motor system of claim 1, wherein, The cooling water channel comprises a first water channel (25-1), part of the first water channel (25-1) is arranged along the circumferential direction of the first annular protrusion (104), the water inlet end of the first water channel (25-1) is formed in the first connecting part (106), and the water outlet end of the first water channel (25-1) is formed in the second connecting part (107).

3. The axial motor system of claim 2, wherein, ​ 4. The axial motor system of claim 3, wherein, The cooling water channel comprises a second water channel (25-2) which is arranged in the second annular protrusion (105) and extends along the circumference of the second annular protrusion (105), and the outlet end of the second water channel (25-2) is in communication with the outlet end of the first water channel (25-1).

5. The axial motor system of claim 4, wherein, The cooling water channel further comprises a third water channel (25-3) which is arranged in the second annular protrusion (105), the inlet end of the third water channel (25-3) is in communication with the outlet end of the second water channel (25-2), and the outlet end of the third water channel (25-3) is arranged on the outer surface of the motor main box (20), and the flow direction of the cooling liquid in the second water channel (25-2) is opposite to that in the third water channel (25-3).

6. The axial motor system of claim 2, wherein, The cooling water channel further comprises a fourth water channel (25-4) which has an inlet end arranged on the outer surface of the motor main box (20), and an outlet end in communication with the water channel in the first connecting part (106).

7. The axial motor system of claim 1, wherein, The power devices (70) are multiple, at least one of the multiple power devices (70) is connected to the outer circumferential surface of the first annular protrusion (104), and / or at least one of the multiple power devices (70) is connected to the inner circumferential surface of the second annular protrusion (105).

8. The axial motor system of claim 1, wherein, The motor main box (20) has a mounting cavity on one side of the shaft hole (101) for mounting a stator assembly, and a circuit board (40) is arranged on the other side of the shaft hole (101) in the motor main box (20), and the circuit board (40) is provided with at least one of a DC bus capacitor output terminal, a power device terminal, a resolver signal terminal (81), a three-phase AC terminal, and a whole vehicle signal plug connector (30).

9. A vehicle comprising an axial motor system, characterized by The axial motor system is the axial motor system according to any one of claims 1 to 8.

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