Interlayer insulation paper, stator, axial motor, electric drive assembly and driving equipment

Abstract

The invention provides interlayer insulation paper, a stator, an axial motor, an electric drive assembly and driving equipment. The interlayer insulation paper comprises in-slot insulation paper arranged in a stator slot of the stator, and the end part of the in-slot insulation paper is connected with end part insulation paper; and the end part insulation paper and the in-slot insulation paper are matched with a winding installed in a stator slot in shape. The end insulation paper and the in-slot insulation paper are arranged to be matched with the winding installed in the stator slot in shape, so that when the winding is installed, extrusion deformation of the interlayer insulation paper can be reduced, damage to the interlayer insulation paper is effectively reduced, and the insulation performance is improved; besides, the end insulation paper is connected with the in-slot insulation paper, after the in-slot insulation paper is placed in the stator slot, the in-slot insulation paper can be positioned through cooperation of the end insulation paper and the side wall of the stator slot, and then the interlayer insulation paper is positioned.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and more specifically, relates to an interlayer insulation paper, a stator, an axial motor, an electric drive assembly and a drive device. Background Art

[0002] Axial motors are gaining more and more attention due to their compact structure, high efficiency, and high power density. Interlayer insulation paper is generally placed between the windings in the stator slots of axial motors to ensure good insulation between the windings. However, when the interlayer insulation paper is placed in the stator slots, the windings are easily squeezed and damaged during installation, thus affecting the insulation performance. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide an interlayer insulation paper, a stator, an axial motor, an electric drive assembly and a drive device to solve the problem in the related art that the interlayer insulation paper is easily squeezed and damaged when the winding of the axial motor is installed in the stator slot, thereby affecting the insulation performance.

[0004] In a first aspect, an embodiment of the present application provides an interlayer insulation paper, including an in-slot insulation paper for placement in a stator slot of a stator, wherein the ends of the in-slot insulation paper are connected to end insulation paper;

[0005] The end insulation paper and the slot insulation paper are adapted to the shape of the winding installed in the stator slot.

[0006] In the technical solution of the embodiment of the present application, by setting the end insulation paper and the in-slot insulation paper to be compatible with the shape of the winding installed in the stator slot, the extrusion deformation of the interlayer insulation paper can be reduced when the winding is installed, thereby effectively reducing the damage to the interlayer insulation paper and improving the insulation performance; in addition, the end insulation paper is connected to the in-slot insulation paper, and after the in-slot insulation paper is placed in the stator slot, the in-slot insulation paper can be positioned by the cooperation of the end insulation paper and the side wall of the stator slot, thereby positioning the interlayer insulation paper.

[0007] In some embodiments, the end insulation paper and the in-slot insulation paper are an integrally formed structure.

[0008] The end insulation paper and the in-slot insulation paper are integrally formed to facilitate processing and manufacturing, improve the connection strength between the end insulation paper and the in-slot insulation paper, and facilitate adaptation to the winding shape after forming.

[0009] In some embodiments, the end insulation paper includes a first insulation paper, and the first insulation paper is arranged at an end of the insulation paper in the slot close to the radial inner side of the stator.

[0010] When the winding is placed in the stator slot, its two ends extend out of the stator slot. By providing the first insulating paper, interlayer insulation can be performed on the end of the winding close to the radial inner side of the stator to improve the insulation performance between the windings.

[0011] In some embodiments, the first insulating paper comprises:

[0012] A first inner section is arranged to extend obliquely from the insulating paper in the slot toward one side of the insulating paper in the slot; and

[0013] The second inner section is extended from an end of the first inner section away from the insulating paper in the slot toward a direction away from the insulating paper in the slot.

[0014] By providing the first inner section and the second inner section, the shape of the inner end of the winding can be well adapted to reduce the extrusion damage to the first insulating paper during the installation of the winding, thereby improving the insulation performance.

[0015] In some embodiments, the first inner segment is transitionally connected to the insulating paper in the slot via a first inner arc segment; and / or the second inner segment is transitionally connected to the first inner segment via a second inner arc segment.

[0016] The provision of the first inner arc segment facilitates the production of the first inner segment and the connection between the first inner segment and the insulating paper in the slot, thereby reducing damage to the connection between the first inner segment and the insulating paper in the slot and improving insulation performance.

[0017] The provision of the second inner arc segment can facilitate the production of the first inner segment and the second inner segment, as well as the connection between the first inner segment and the second inner segment, thereby reducing damage to the connection between the first inner segment and the second inner segment and improving insulation performance.

[0018] In some embodiments, the end insulation paper includes second insulation paper, and the second insulation paper is arranged at an end of the insulation paper in the slot close to the radial outer side of the stator.

[0019] When the winding is placed in the stator slot, its two ends extend out of the stator slot. By providing the second insulating paper, interlayer insulation can be performed on the end of the winding close to the radial outer side of the stator to improve the insulation performance between the windings.

[0020] In some embodiments, the second insulating paper comprises:

[0021] A first outer section is arranged to extend obliquely from the insulating paper in the slot toward one side of the insulating paper in the slot; and

[0022] The second outer section is extended from an end of the first outer section away from the insulating paper in the slot toward a direction away from the insulating paper in the slot.

[0023] By providing the first outer segment and the second outer segment, the shape of the outer end of the winding can be well adapted to reduce the extrusion damage to the second insulating paper during the installation of the winding, thereby improving the insulation performance.

[0024] In some embodiments, the first outer segment is transitionally connected to the insulating paper in the slot via a first outer arc segment; and / or, the second outer segment is transitionally connected to the first outer segment via a second outer arc segment.

[0025] The provision of the first outer arc segment facilitates the production of the first outer segment and the connection between the first outer segment and the insulating paper outside the slot, thereby reducing damage to the connection between the first outer segment and the insulating paper outside the slot and improving insulation performance.

[0026] The provision of the second outer arc segment can facilitate the production of the first outer segment and the second outer segment, as well as the connection between the first outer segment and the second outer segment, thereby reducing damage to the connection between the first outer segment and the second outer segment and improving insulation performance.

[0027] In some embodiments, the interlayer insulating paper includes a plurality of in-slot insulating papers, and the plurality of in-slot insulating papers are connected into one body.

[0028] A plurality of in-slot insulating papers connected as one body are provided. When in use, the plurality of in-slot insulating papers can be synchronously installed in a plurality of stator slots to facilitate installation and use.

[0029] In some embodiments, an opening for passing the stator teeth of the stator is provided between the insulating papers in two adjacent slots.

[0030] Openings are provided between the insulating papers in adjacent slots to facilitate installation of the insulating papers in the slots in the stator slots, making installation and use easier.

[0031] In some embodiments, a connecting portion is provided between the insulating papers in two adjacent slots, and a breakable mark that can be broken is provided at the connection between the connecting portion and the insulating papers in the slots.

[0032] By providing a connecting part, multiple insulating papers in the slots can be connected, which is convenient for movement and installation; and by providing an easy-to-break mark, the connecting part can be removed when installing the insulating paper in the slot, which is convenient for use.

[0033] In some embodiments, end insulating papers are provided at the ends of the insulating papers in each slot, and two adjacent end insulating papers are connected.

[0034] The two adjacent end insulation papers are connected, and the end insulation papers are connected to the corresponding in-slot insulation papers, so that multiple in-slot insulation papers can be connected for easy processing and use.

[0035] In some embodiments, two adjacent end insulating papers are an integrally formed structure.

[0036] The two adjacent end insulation papers are formed as one piece, which can facilitate processing and manufacturing, and multiple slot insulation papers and end insulation papers can be formed as one piece, which is convenient for processing and manufacturing.

[0037] In some embodiments, the end insulation papers corresponding to the insulation papers in the multiple slots are arranged in a ring shape.

[0038] The end insulating paper is arranged in a ring shape, and multiple slot insulating papers can be connected. When in use, the slot insulating papers can be installed in each stator slot of the stator simultaneously, which is convenient for assembly and use; and it is also convenient for processing and manufacturing.

[0039] In some embodiments, the interlayer insulating paper includes a plurality of blocks, the plurality of blocks are arranged in a ring shape, and each block includes at least one in-slot insulating paper.

[0040] The interlayer insulation paper is arranged in multiple blocks for easy processing and manufacturing; in addition, the multiple stator slots of the stator are arranged in a ring shape, so that the multiple blocks are arranged in a ring shape, which can facilitate the installation of slot insulation paper in each stator slot, facilitate the installation of interlayer insulation paper on the stator, and facilitate use.

[0041] In some embodiments, each block is an integrally formed structure.

[0042] Each block is formed in one piece to facilitate processing and manufacturing.

[0043] In some embodiments, at least two blocks have different breakdown resistance properties.

[0044] The breakdown resistance performance of at least two blocks is set differently, and blocks with different breakdown resistance performance can be used according to the voltage difference between windings in the stator slots, so as to reduce the cost and ensure good insulation performance between windings.

[0045] In some embodiments, at least two blocks have different dielectric strengths.

[0046] By setting the insulation withstand voltage strength of at least two blocks to be different, blocks with different insulation withstand voltage strength can be used according to the voltage difference between windings in the stator slots, so as to reduce the cost and ensure good insulation performance between windings.

[0047] In some embodiments, at least two of the blocks have different thicknesses.

[0048] By setting the thickness of at least two blocks to be different, blocks of different thicknesses can be used according to the voltage difference between windings in the stator slots, so as to reduce the cost and ensure good insulation performance between windings.

[0049] In some embodiments, the thickness of the block ranges from 0.15 mm to 0.5 mm.

[0050] Using blocks with a thickness of 0.15mm-0.5mm has low cost, occupies little space in the stator slot, and has good insulation performance.

[0051] In some embodiments, the above-mentioned blocks include a first block, and the thickness of the first block ranges from 0.2 mm to 0.3 mm;

[0052] And / or, the above block includes a second block, and the thickness of the second block ranges from 0.15 mm to 0.2 mm;

[0053] And / or, the above-mentioned blocks include a third block, and the thickness of the third block ranges from 0.3 mm to 0.5 mm.

[0054] The first block is set and has a thickness ranging from 0.2 mm to 0.3 mm. The first block can be used in stator slots with a moderate voltage difference between windings to achieve a more reasonable allocation of insulation performance, occupied space and cost.

[0055] The second block is provided and has a thickness ranging from 0.15 mm to 0.2 mm. The second block can be used in stator slots with a small voltage difference between windings to achieve a more reasonable allocation of insulation performance, occupied space and cost.

[0056] The third block is provided, and the thickness of the third block is made to range from 0.3 mm to 0.5 mm. The third block can be used in stator slots with a large voltage difference between windings to achieve a more reasonable allocation of insulation performance, occupied space and cost.

[0057] In a second aspect, an embodiment of the present application provides a stator, comprising the interlayer insulation paper as described in any of the above embodiments.

[0058] In a third aspect, an embodiment of the present application provides an axial motor, comprising a stator as described in the above embodiment.

[0059] In a fourth aspect, an embodiment of the present application provides an electric drive assembly, comprising an axial motor as described in the above embodiment.

[0060] In a fifth aspect, an embodiment of the present application provides a driving device, including an axial motor as described in the above embodiment; or including an electric drive assembly as described in the above embodiment.

[0061] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0063] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0064] Figure 2 This is a schematic diagram of the structure of an axial motor in some embodiments of the present application;

[0065] Figure 3 It is a schematic diagram of the structure of the axial motor of some other embodiments of the present application;

[0066] Figure 4 This is a schematic diagram of the structure of an axial motor according to some other embodiments of the present application;

[0067] Figure 5 It is a structural schematic diagram of an axial motor in some other embodiments of the present application;

[0068] Figure 6 A schematic diagram of a partial structure of a stator in some embodiments of the present application;

[0069] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along the AA line;

[0070] Figure 8 This is a schematic diagram of the structure of interlayer insulation paper in the stator of some embodiments of the present application;

[0071] Fig. 9 This is a schematic diagram of the structure of interlayer insulation paper in other embodiments of the present application;

[0072] Fig.10 This is a schematic diagram of the structure of interlayer insulation paper in some other embodiments of the present application;

[0073] Fig.11 This is a schematic diagram of the structure of interlayer insulation paper in some other embodiments of the present application;

[0074] Fig.12 This is a schematic structural diagram of interlayer insulation paper according to some other embodiments of the present application.

[0075] Among them, the main marks of the drawings in the figure are:

[0076] 1000-vehicle; 1001-electric drive assembly; 100-axial motor; 200-transmission; 1002-controller; 1003-battery;

[0077] 10- rotor;

[0078] 20- stator;

[0079] 21- stator core; 210- stator slot; 211- stator tooth; 22- winding;

[0080] 23-interlayer insulation paper; 230-block; 2301-first block; 2302-second block; 2303-third block; 24-slot insulation paper; 241-opening; 242-connecting part; 243-easy break mark; 25-end insulation paper; 251-first insulation paper; 2511-first inner section; 2512-second inner section; 2513-first inner arc section; 2514-second inner arc section; 252-second insulation paper; 2521-first outer section; 2522-second outer section; 2523-first outer arc section; 2524-second outer arc section;

[0081] 30-Rotation shaft. DETAILED DESCRIPTION

[0082] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0083] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0084] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0085] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0086] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0087] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces). "Several" means one or more than one, unless otherwise clearly and specifically defined.

[0088] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0089] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0090] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0091] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "adjacent" refers to proximity in position. For example, among the three components A1, A2 and B, if the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, or B is adjacent to A2. For another example, when there are multiple C components, the multiple C components are C1, C2, C... N When one of the C components, such as C2, is closer to the B component than other C components, then B is adjacent to C2, or it can be said that C2 is adjacent to B.

[0092] The drive structure using the motor as the power source is generally called electric drive. The motor is integrated with one or more components such as the cooling system, the speed change mechanism, and the controller to form an electric drive assembly. The electric drive assembly is also called an electric drive assembly or an electric drive device. The electric drive assembly is the main power device of the electric vehicle. The electric drive assembly is used to convert the electrical energy provided by the battery into mechanical energy to drive the electric vehicle. At present, the electric drive assembly can be divided into a centralized electric drive assembly and a distributed electric drive assembly. Among them, the centralized electric drive assembly transmits the output torque of the motor to the left and right wheels of the electric vehicle through a mechanical transmission device such as a transmission and a reducer to drive the electric vehicle to travel, while the distributed electric drive assembly usually includes at least two motors, and the output torque of each motor is transmitted to one wheel to drive the electric vehicle to travel, so that the distributed electric drive assembly can realize independent control of a single wheel of the electric vehicle. Therefore, compared with electric vehicles using centralized electric drive assemblies, electric vehicles using distributed electric drive assemblies have better maneuverability, making distributed electric drive assemblies more and more popular with automobile manufacturers.

[0093] Motors are also called electric motors. They are generally composed of two parts: a rotor and a stator. A motor is a device that converts electrical energy into mechanical energy. It uses an energized coil to generate a rotating magnetic field and acts on the rotor to form a magnetic-electrical force rotation torque. The fixed part of the motor is called the stator, and the rotating part of the motor is called the rotor. The stator drives the rotor to rotate in the motor to convert electrical energy into mechanical energy, thereby outputting torque.

[0094] In addition, in some cases, the motor does not directly output power, and a speed change mechanism is also set in the casing of the electric drive assembly. For example, in some cases where a large torque is required, a reducer is often set in the casing to increase the torque and output power through the reducer; in some cases where the driving speed requirements are low, a reducer is also used. For some cases where a higher speed is required, a speed increaser is also required to increase the output speed. In other words, a speed change mechanism is also integrated in some electric drive assemblies. The speed change mechanism, also known as the gearbox, is a mechanism used to change the speed and torque from the motor. It can fix or change the transmission ratio of the output shaft and the input shaft in stages. The speed change mechanism is composed of a speed change transmission assembly. Most transmission assemblies use ordinary gear transmission, some use planetary gear transmission, and some use belt transmission.

[0095] Motors can be divided into radial motors and axial motors. A radial motor is a motor in which the stator and rotor are arranged radially, such as a motor in which the stator is located on the outer periphery of the rotor or the rotor is located on the outer periphery of the stator, that is, a motor in which the stator is sleeved on the outer periphery of the rotor or the rotor is sleeved on the outer periphery of the stator. Axial motors are motors in which the stator and rotor are arranged axially. For axial motors, the stator is located on the side of the rotor, and correspondingly, the rotor is also located on the side of the stator. For ease of description, the side of the rotor close to the stator is defined as the stator side.

[0096] Axial motors have gained more and more attention due to their compact structure, high efficiency, and high power density. Since the stator is located on the side of the rotor, the stator generally includes a stator core and a winding. The side of the stator core is annularly arrayed with stator teeth, and stator slots are formed between adjacent stator teeth. The stator windings are arranged in the stator slots to generate an electromagnetic field.

[0097] Since multiple layers of windings are generally arranged in the stator slots, and the windings are energized when the axial motor is working, a voltage difference will be formed between two adjacent layers of windings. In particular, when multi-phase windings are wound in the stator slots, the voltage difference between two adjacent phase windings will be greater. Therefore, in order to improve safety and prevent the windings from breaking down and short-circuiting due to voltage differences, good insulation is generally required between the two layers of windings, especially between the two-phase windings.

[0098] At present, in order to improve the insulation between the winding layers, insulating paper is often placed between the two layers of windings, and the insulation performance between the winding layers is improved by the interlayer insulating paper. During assembly, generally after one layer or one phase of winding is installed in the stator slot, the interlayer insulating paper is placed, and then the next layer of winding or another phase winding is installed. However, since the winding is a three-dimensional structure, its two ends are mostly tilted to one side relative to the middle. When the winding is installed in the stator slot, on the one hand, the two ends of the winding will be stretched and squeezed, and the paint film on the winding will be damaged, which is easy to break down and cause insulation failure; on the other hand, the winding will also squeeze the interlayer insulating paper, causing damage to the interlayer insulating paper, thereby affecting the insulation performance.

[0099] Based on the above considerations, in order to solve the problem that the interlayer insulation paper is easily squeezed and damaged when the winding of the axial motor is installed in the stator slot, thereby affecting the insulation performance, an embodiment of the present application provides an interlayer insulation paper, by pre-forming the part of the interlayer insulation paper placed in the stator slot and the end part located outside the stator slot, so that the interlayer insulation paper is arranged to be compatible with the shape of the winding installed in the stator slot, so that when the winding is installed, the extrusion deformation of the interlayer insulation paper can be reduced, thereby effectively reducing the damage to the interlayer insulation paper and improving the insulation performance.

[0100] The interlayer insulating paper disclosed in the embodiment of the present application can be applied to the stator of an axial motor. The stator disclosed in the embodiment of the present application can be used for an axial motor. The axial motor can be used as a power structure for an electric drive assembly, a drive device, etc. as a power source. The electric drive assembly can also be applied to a drive device. The drive device can be, but is not limited to, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, and the like. Electric toys can include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0101] The driving device can be an electric vehicle or a vehicle chassis. The axial motor can be integrated with one or more of the power supply, controller, gearbox and other devices to form an electric drive assembly.

[0102] For the convenience of explanation, a driving device is provided in accordance with an embodiment of the present application, and the driving device is explained by taking a vehicle as an example.

[0103] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. An electric drive assembly 1001 is provided inside the vehicle 1000, and the electric drive assembly 1001 may be provided at the bottom, head or tail of the vehicle 1000. The electric drive assembly 1001 may be used to increase the power of the vehicle 1000. The vehicle 1000 may also include a controller 1002 and a battery 1003, and the controller 1002 is used to control the operation of the electric drive assembly 1001, for example, to control the start, speed change and stop of the electric drive assembly 1001. The controller 1002 may also be used to control the battery 1003 to supply power to the electric drive assembly 1001, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving.

[0104] In some embodiments, the electric drive assembly 1001 includes an axial motor 100, and the axial motor 100 is used as a power source for the electric drive assembly 1001. It can be understood that the electric drive assembly 1001 is not limited to being used in the vehicle 1000, but can also be used in other devices that require power output.

[0105] In some embodiments, the electric drive assembly 1001 may further include a transmission 200, which is connected to the axial motor 100 to achieve torque change of the axial motor 100. The transmission 200 (Transmission), also known as a gearbox, is a mechanism used to change the speed and torque from the engine, and it can change the output shaft and input shaft transmission ratio in a fixed or step-by-step manner.

[0106] In some embodiments, the controller 1002 may be integrated with the axial motor 100 to form an electric drive assembly 1001 .

[0107] In some embodiments, the battery 1003 may be integrated with the axial motor 100 to form an electric drive assembly 1001 .

[0108] In some embodiments, the transmission 200 and the controller 1002 may be integrated with the axial motor 100 to form an electric drive assembly 1001 .

[0109] In some embodiments, the transmission 200, the controller 1002 and the battery 1003 may be integrated with the axial motor 100 to form an electric drive assembly 1001. Of course, the electric drive assembly 1001 may also be integrated with other structures, such as a cooling oil circuit.

[0110] See also Figure 2 , Figure 2 A schematic diagram of the structure of the axial motor 100 provided in an embodiment of the present application.

[0111] The embodiment of the present application provides an axial motor 100 , which includes a rotating shaft 30 , a stator 20 , and a rotor 10 . The rotor 10 is fixedly mounted on the rotating shaft 30 , and the stator 20 is located on a side of the rotor 10 .

[0112] The rotating shaft 30 refers to a shaft-shaped member in the axial motor 100 for outputting power. The rotating shaft 30 is fixedly connected to the rotor 10 and can rotate driven by the rotor 10 to output power.

[0113] The stator 20 and the rotating shaft 30 can rotate relative to each other, so that the stator 20 and the rotor 10 can rotate relative to each other. For example, in some embodiments, the stator 20 can be supported on the rotating shaft 30 by a bearing. In some embodiments, when the axial motor 100 includes a housing, the stator 20 can be fixed to the housing, and the stator 20 can be supported by the housing, and the rotor 10 and the rotating shaft 30 are rotatably installed in the housing, so that the stator 20 and the rotor 10 can rotate relative to each other, so that the stator 20 drives the rotor 10 to rotate.

[0114] The stator 20 is located on the side of the rotor 10 , which means that the stator 20 is located on one side of the axial direction of the rotor 10 , so that the stator 20 drives the rotor 10 to rotate, and further drives the rotating shaft 30 to rotate.

[0115] The axial direction refers to the axial direction of the rotating shaft 30 , and the axial direction of the rotating shaft 30 is also the axial direction of the stator 20 and the axial direction of the rotor 10 . Therefore, the axial direction also refers to the axial direction of the rotor 10 .

[0116] The radial direction refers to the radial direction of the rotating shaft 30 , and the radial direction of the rotating shaft 30 is also the radial direction of the stator 20 and the radial direction of the rotor 10 . Therefore, the radial direction also refers to the radial direction of the rotor 10 .

[0117] The circumferential direction refers to a direction around the axial direction of the rotating shaft 30 , which is also a direction around the axial direction of the rotor 10 .

[0118] In some embodiments, there may be one rotor 10 and one stator 20, and the stator 20 is located on one side of the rotor 10. The axial motor 100 has a simple structure and a small volume. In this structure, the side of the rotor 10 close to the stator 20 is the stator side.

[0119] See also Figure 3 , Figure 3 A schematic diagram of the structure of the axial motor 100 provided in an embodiment of the present application.

[0120] In some embodiments, the axial motor 100 includes two stators 20 and a rotor 10, and the two stators 20 are located on opposite sides of the rotor 10, so that the same rotor 10 can be driven to rotate by the two stators 20 to improve the output power, and the structure of the axial motor 100 is more compact. In this structure, since the stators 20 are provided on opposite sides of the rotor 10, the opposite sides of the rotor 10 are both stator sides.

[0121] See also Figure 4 , Figure 4 A schematic diagram of the structure of the axial motor 100 provided in an embodiment of the present application.

[0122] In some embodiments, the axial motor 100 includes two rotors 10 and a stator 20, and the two rotors 10 are located on opposite sides of the stator 20, so that the two rotors 10 can be driven to rotate by one stator 20, and the same rotating shaft 30 can be driven to rotate, so as to improve the output power, and the structure of the axial motor 100 is more compact. In this structure, since the stator 20 is provided on one side of each rotor 10, the side of the rotor 10 close to the stator 20 is the stator side.

[0123] See also Figure 5 , Figure 5 A schematic diagram of the structure of the axial motor 100 provided in an embodiment of the present application.

[0124] In some embodiments, the axial motor 100 includes multiple rotors 10 and multiple stators 20, wherein a stator 20 is disposed between two adjacent rotors 10, and a rotor 10 is disposed between two adjacent stators 20, and the multiple rotors 10 are driven to rotate by the multiple stators 20, thereby driving the rotating shaft 30 to rotate, so as to increase the output power. In this structure, the side of each rotor 10 close to the stator 20 is the stator side.

[0125] See also Figures 6 to 8 , Figure 6 It is a schematic diagram of the partial structure of the stator 20 of some embodiments of the present application. Figure 7 For along Figure 6 Schematic diagram of the cross-sectional structure along line AA. Figure 8 Schematic diagram of the structure of the interlayer insulation paper 23 in the stator 20 of some embodiments of the present application.

[0126] The embodiment of the present application provides an interlayer insulating paper 23, including an in-slot insulating paper 24 for being placed in a stator slot 210 of a stator 20, and an end insulating paper 25 is connected to the end of the in-slot insulating paper 24; the end insulating paper 25 and the in-slot insulating paper 24 are adapted to the shape of the winding 22 installed in the stator slot 210.

[0127] The interlayer insulating paper 23 refers to the insulating paper provided between the windings 22 of the stator 20 of the axial motor 100 to achieve insulation between the windings 22. The interlayer insulating paper 23 can be made of paper material, and of course, can also be made of other insulating materials, such as insulating plastic sheets.

[0128] The in-slot insulation paper 24 refers to the portion of the interlayer insulation paper 23 placed in the stator slot 210 .

[0129] The end insulating paper 25 refers to a portion of the interlayer insulating paper 23 that is located outside the stator slot 210 .

[0130] The end insulating paper 25 and the in-slot insulating paper 24 are adapted to the shape of the winding 22 installed in the stator slot 210, which means that the shape of the overall structure formed by connecting the end insulating paper 25 and the in-slot insulating paper 24 is adapted to the shape of the winding 22, so that the interlayer insulating paper 23 is installed on the stator 20, and the in-slot insulating paper 24 is placed in the stator slot 210. When the winding 22 is installed, the winding 22 has little squeezing on the interlayer insulating paper 23, thereby reducing the damage to the interlayer insulating paper 23 to improve the insulation performance.

[0131] By setting the end insulating paper 25 and the in-slot insulating paper 24 to match the shape of the winding 22 installed in the stator slot 210, the extrusion deformation of the interlayer insulating paper 23 can be reduced when the winding 22 is installed, thereby effectively reducing the damage to the interlayer insulating paper 23 and improving the insulation performance; in addition, the end insulating paper 25 is connected to the in-slot insulating paper 24. After the in-slot insulating paper 24 is placed in the stator slot 210, the in-slot insulating paper 24 can be positioned by the cooperation of the end insulating paper 25 and the side wall of the stator slot 210, thereby positioning the interlayer insulating paper 23.

[0132] In some embodiments, the end insulation paper 25 and the in-slot insulation paper 24 are an integrally formed structure.

[0133] The end insulating paper 25 and the in-slot insulating paper 24 are integrally formed, which means that the end insulating paper 25 and the in-slot insulating paper 24 are made in one piece. For example, a larger insulating paper can be used to form an integral structure of the end insulating paper 25 and the in-slot insulating paper 24 through three-dimensional molding.

[0134] The end insulating paper 25 and the in-slot insulating paper 24 are integrally formed to facilitate processing and manufacturing, improve the connection strength between the end insulating paper 25 and the in-slot insulating paper 24, and facilitate adaptation to the shape of the winding 22 after forming.

[0135] In some embodiments, the end insulation paper 25 includes a first insulation paper 251 , and the first insulation paper 251 is disposed at an end of the in-slot insulation paper 24 close to the radial inner side of the stator 20 .

[0136] The first insulating paper 251 refers to insulating paper used to insulate and separate adjacent windings 22 close to the radial inner end of the stator 20 .

[0137] The radial inner side of the stator 20 refers to a side close to the center of the stator 20 along the radial direction of the stator 20 .

[0138] The first insulating paper 251 is arranged on the radial inner side of the in-slot insulating paper 24 close to the stator 20. The in-slot insulating paper 24 is installed in the stator slot 210, and the first insulating paper 251 is connected to the radial inner side of the in-slot insulating paper 24. The first insulating paper 251 is located on the radial inner side of the stator slot 210 to insulate and separate the radial inner end of the adjacent winding 22 close to the stator 20.

[0139] The radial inner side of the stator slot 210 is also the radial inner side of the stator 20 , and when the interlayer insulation paper 23 is installed on the stator core 21 , the radial inner side of the stator 20 is also the radial inner side of the interlayer insulation paper 23 , and the radial inner side of the stator 20 is also the radial inner side of the stator core 21 .

[0140] Since the winding 22 is placed in the stator slot 210, its two ends extend out of the stator slot 210, and a first insulating paper 251 is provided. The first insulating paper 251 extends from the radial inner side of the stator slot 210, and interlayer insulation can be performed on the end of the winding 22 close to the radial inner side of the stator 20 to improve the insulation performance between the windings 22.

[0141] In some embodiments, the first insulating paper 251 includes: a first inner section 2511, which is obliquely extended from the insulating paper 24 in the slot toward one side of the insulating paper 24 in the slot; and a second inner section 2512, which is extended from one end of the first inner section 2511 away from the insulating paper 24 in the slot toward a direction away from the insulating paper 24 in the slot.

[0142] The first inner section 2511 refers to a portion of the first insulating paper 251 close to the insulating paper 24 in the slot.

[0143] The second inner section 2512 refers to the portion of the first insulating paper 251 away from the insulating paper 24 in the slot.

[0144] One side of the in-slot insulating paper 24 refers to one side along the thickness direction of the in-slot insulating paper 24 .

[0145] By providing the first inner section 2511 and the second inner section 2512, the shape of the inner end of the winding 22 can be well adapted to reduce the extrusion damage to the first insulating paper 251 when the winding 22 is installed, thereby improving the insulation performance.

[0146] In some embodiments, the first inner segment 2511 is transitionally connected to the insulating paper 24 in the slot via the first inner arc segment 2513 .

[0147] The first inner arc segment 2513 refers to a segment of the first insulating paper 251 that connects the first inner segment 2511 and the insulating paper 24 in the slot. The first inner arc segment 2513 is in an arc shape, so that the first inner segment 2511 and the insulating paper 24 in the slot transition through the first inner arc segment 2513 to reduce the crease damage at the connection between the first inner segment 2511 and the insulating paper 24 in the slot.

[0148] The provision of the first inner arc segment 2513 can facilitate the production of the first inner segment 2511 and the connection between the first inner segment 2511 and the insulating paper 24 in the slot, thereby reducing damage to the connection between the first inner segment 2511 and the insulating paper 24 in the slot and improving insulation performance.

[0149] In some embodiments, the second inner segment 2512 is transitionally connected to the first inner segment 2511 via a second inner arc segment 2514 .

[0150] The second inner arc segment 2514 refers to a segment on the first insulating paper 251 that connects the first inner segment 2511 and the second inner segment 2512. The second inner arc segment 2514 is in an arc shape so that the second inner segment 2512 transitions to the second inner segment 2512 through the second inner arc segment 2514 to reduce the crease damage at the connection between the first inner segment 2511 and the second inner segment 2512.

[0151] The provision of the second inner arc segment 2514 can facilitate the production of the first inner segment 2511 and the second inner segment 2512, and also facilitate the connection between the first inner segment 2511 and the second inner segment 2512, thereby reducing damage to the connection between the first inner segment 2511 and the second inner segment 2512 and improving insulation performance.

[0152] In some embodiments, the first inner section 2511 is transitionally connected to the insulating paper 24 in the slot via the first inner arc section 2513, and the second inner section 2512 is transitionally connected to the first inner section 2511 via the second inner arc section 2514. This can reduce the crease damage of the interlayer insulating paper 23 and improve the insulation performance.

[0153] In some embodiments, the end insulation paper 25 includes a second insulation paper 252 , and the second insulation paper 252 is disposed at an end of the in-slot insulation paper 24 close to the radial outer side of the stator 20 .

[0154] The second insulating paper 252 refers to insulating paper used to insulate and separate adjacent windings 22 near the radially outer end of the stator 20 .

[0155] The second insulating paper 252 is arranged on the radial outer side of the in-slot insulating paper 24 close to the stator 20. The in-slot insulating paper 24 is installed in the stator slot 210, and the second insulating paper 252 is connected to the radial outer side of the in-slot insulating paper 24. The second insulating paper 252 is located on the radial outer side of the stator slot 210 to insulate and separate the radial outer end of the adjacent winding 22 close to the stator 20.

[0156] The radial outer side of the stator slot 210 is also the radial outer side of the stator 20 , and when the interlayer insulation paper 23 is installed on the stator core 21 , the radial outer side of the stator 20 is also the radial outer side of the interlayer insulation paper 23 , and the radial outer side of the stator 20 is also the radial outer side of the stator core 21 .

[0157] Since the winding 22 is placed in the stator slot 210, its two ends extend out of the stator slot 210, and a second insulating paper 252 is provided. The second insulating paper 252 extends radially outward from the stator slot 210, and interlayer insulation can be performed on the end of the winding 22 close to the radial outer side of the stator 20 to improve the insulation performance between the windings 22.

[0158] In some embodiments, the second insulating paper 252 includes: a first outer segment 2521, which is obliquely extended from the insulating paper 24 in the slot toward one side of the insulating paper 24 in the slot; and a second outer segment 2522, which is extended from one end of the first outer segment 2521 away from the insulating paper 24 in the slot toward a direction away from the insulating paper 24 in the slot.

[0159] The first outer section 2521 refers to a portion of the second insulating paper 252 close to the insulating paper 24 in the slot.

[0160] The second outer section 2522 refers to the portion of the second insulating paper 252 away from the insulating paper 24 in the slot.

[0161] One side of the in-slot insulating paper 24 refers to one side along the thickness direction of the in-slot insulating paper 24 .

[0162] By providing the first outer segment 2521 and the second outer segment 2522, the shape of the outer end of the winding 22 can be well adapted to reduce the extrusion damage to the second insulating paper 252 when the winding 22 is installed, thereby improving the insulation performance.

[0163] In some embodiments, the first outer segment 2521 is transitionally connected to the insulating paper 24 in the slot via the first outer arc segment 2523 .

[0164] The first outer arc segment 2523 refers to a segment of the second insulating paper 252 that connects the first outer segment 2521 and the insulating paper 24 in the slot. The first outer arc segment 2523 is in an arc shape, so that the first outer segment 2521 transitions to the insulating paper 24 in the slot through the first outer arc segment 2523, so as to reduce the crease damage at the connection between the first outer segment 2521 and the insulating paper 24 in the slot.

[0165] The provision of the first outer arc segment 2523 facilitates the production of the first outer segment 2521 and the connection between the first outer segment 2521 and the insulating paper 24 in the slot, thereby reducing damage to the connection between the first outer segment 2521 and the insulating paper 24 in the slot and improving insulation performance.

[0166] In some embodiments, the second outer segment 2522 is transitionally connected to the first outer segment 2521 via a second outer arc segment 2524 .

[0167] The second outer arc segment 2524 refers to a segment on the second insulating paper 252 that connects the first outer segment 2521 and the second outer segment 2522. The second outer arc segment 2524 is in an arc shape so that the second outer segment 2522 transitions to the second outer segment 2522 through the second outer arc segment 2524 to reduce the crease damage at the connection between the first outer segment 2521 and the second outer segment 2522.

[0168] The provision of the second outer arc segment 2524 can facilitate the production of the first outer segment 2521 and the second outer segment 2522, and also facilitate the connection between the first outer segment 2521 and the second outer segment 2522, thereby reducing damage to the connection between the first outer segment 2521 and the second outer segment 2522 and improving insulation performance.

[0169] In some embodiments, the first outer segment 2521 is transitionally connected to the insulating paper 24 in the slot via the first outer arc segment 2523, and the second outer segment 2522 is transitionally connected to the first outer segment 2521 via the second outer arc segment 2524. This can reduce the crease damage of the interlayer insulating paper 23 and improve the insulation performance.

[0170] In some embodiments, the end insulating paper 25 includes a first insulating paper 251 and a second insulating paper 252, wherein the first insulating paper 251 is disposed at one end of the slot insulating paper 24 close to the radial inner side of the stator 20, and the second insulating paper 252 is disposed at one end of the slot insulating paper 24 close to the radial outer side of the stator 20. Thus, when in use, the first insulating paper 251, the slot insulating paper 24, and the second insulating paper 252 can cooperate to perform interlayer insulation separation over the entire length of the winding 22 in the radial direction, thereby improving the insulation performance.

[0171] The width direction of the insulating paper 24 in the slot is perpendicular to the thickness direction of the insulating paper 24 in the slot, and the width direction of the insulating paper 24 in the slot is perpendicular to the length direction of the insulating paper 24 in the slot. When in use, the length direction of the insulating paper 24 in the slot is consistent with the radial direction of the stator 20.

[0172] In some embodiments, the width of the first insulating paper 251 is greater than the width of the in-slot insulating paper 24. The width direction of the first insulating paper 251 is consistent with the width direction of the in-slot insulating paper 24, so that when the first insulating paper 251 and the in-slot insulating paper 24 are installed on the stator core 21, the stator slot 210 can be used to limit the opposite sides of the in-slot insulating paper 24, and the first insulating paper 251 cooperates with the side wall of the stator slot 210 to position the radial inner side of the in-slot insulating paper 24, so as to better position the interlayer insulating paper 23, which is convenient for assembly and use.

[0173] In some embodiments, the width of the second insulating paper 252 is greater than the width of the in-slot insulating paper 24. The width direction of the second insulating paper 252 is consistent with the width direction of the in-slot insulating paper 24, so that when the second insulating paper 252 and the in-slot insulating paper 24 are installed on the stator core 21, the opposite sides of the in-slot insulating paper 24 can be positioned through the stator slot 210, and the second insulating paper 252 cooperates with the side wall of the stator slot 210 to position the radial outer side of the in-slot insulating paper 24, so as to better position the interlayer insulating paper 23, which is convenient for assembly and use.

[0174] In some embodiments, the end insulating paper 25 includes a first insulating paper 251 and a second insulating paper 252. The first insulating paper 251 is arranged at one end of the insulating paper 24 in the slot close to the radial inner side of the stator 20, and the second insulating paper 252 is arranged at one end of the insulating paper 24 in the slot close to the radial outer side of the stator 20. When the first insulating paper 251, the second insulating paper 252 and the insulating paper 24 in the slot are installed on the stator core 21, the first insulating paper 251, the second insulating paper 252 and the insulating paper 24 in the slot can be limited by the side wall of the stator slot 210 to reduce the risk of movement of the interlayer insulating paper 23 and facilitate assembly and use.

[0175] In some embodiments, when the interlayer insulation paper 23 includes an in-slot insulation paper 24, since the stator 20 has multiple stator slots 210, the stator 20 has multiple interlayer insulation papers 23, and the multiple interlayer insulation papers 23 are arranged in a ring array, so that the interlayer insulation paper 23 can be installed at each stator slot 210 of the stator 20, thereby performing interlayer insulation isolation on the winding 22 in each stator slot 210.

[0176] See also Fig. 9 , Fig. 9 This is a schematic structural diagram of the interlayer insulation paper 23 of some embodiments of the present application.

[0177] In some embodiments, please refer to Figure 6 and Figure 7 The interlayer insulating paper 23 includes a plurality of in-slot insulating papers 24 , and the plurality of in-slot insulating papers 24 are connected into one body.

[0178] The plurality of in-slot insulating papers 24 are connected as one body, which means that the plurality of in-slot insulating papers 24 are arranged at corresponding positions of the plurality of stator slots 210 and connected as one body.

[0179] A plurality of in-slot insulating papers 24 connected in one body are provided. When in use, the plurality of in-slot insulating papers 24 can be synchronously installed in a plurality of stator slots 210 to facilitate installation and use.

[0180] In some embodiments, an opening 241 for the stator teeth 211 of the stator 20 to pass through is provided between the insulating papers 24 in two adjacent slots.

[0181] The opening 241 refers to an opening structure located between the insulating papers 24 in two adjacent slots. When in use, the stator teeth 211 can pass through the opening 241 .

[0182] Openings 241 are provided between adjacent in-slot insulating papers 24 to facilitate installation of the in-slot insulating papers 24 in the stator slots 210 , making installation and use easier.

[0183] In some embodiments, a connecting portion 242 is provided between two adjacent in-slot insulating papers 24 , and a breakable mark 243 that can be broken is provided at the connection between the connecting portion 242 and the in-slot insulating papers 24 .

[0184] The connecting portion 242 refers to a structural portion connecting the insulating papers 24 in two adjacent slots.

[0185] The fragile mark 243 refers to a mark or connection point that is easily broken.

[0186] By providing the connecting portion 242, multiple in-slot insulating papers 24 are connected to facilitate movement and installation; and by providing the easy-to-break mark 243, the connecting portion 242 can be removed when installing the in-slot insulating paper 24, which is convenient for use.

[0187] See also Fig.10 , Fig.10 This is a schematic structural diagram of the interlayer insulation paper 23 of some embodiments of the present application.

[0188] In some embodiments, please refer to Figure 6 and Figure 7 An end insulating paper 25 is provided at the end of the insulating paper 24 in each slot, and two adjacent end insulating papers 25 are connected.

[0189] The two adjacent end insulating papers 25 are connected, and the end insulating papers 25 are connected to the corresponding in-slot insulating papers 24, so that a plurality of in-slot insulating papers 24 can be connected for easy processing and use.

[0190] When the end insulating paper 25 includes the first insulating paper 251 , the first insulating paper 251 corresponding to the insulating papers 24 in two adjacent slots can be connected to achieve connection of the insulating papers 24 in the two adjacent slots.

[0191] When the end insulating paper 25 includes the second insulating paper 252 , the second insulating paper 252 corresponding to the insulating papers 24 in two adjacent slots can be connected to achieve connection of the insulating papers 24 in the two adjacent slots.

[0192] In some embodiments, two adjacent end insulating papers 25 are an integrally formed structure.

[0193] Two adjacent end insulating papers 25 are integrally formed, which means that the two adjacent end insulating papers 25 are integrally formed so that the two adjacent end insulating papers 25 are connected.

[0194] The two adjacent end insulation papers 25 are integrally formed, which can facilitate processing and manufacturing, and multiple slot insulation papers 24 and end insulation papers 25 can be integrally formed, which is convenient for processing and manufacturing.

[0195] When the end insulating paper 25 includes the first insulating paper 251 , the first insulating paper 251 corresponding to the insulating papers 24 in two adjacent slots can be integrally formed to connect the insulating papers 24 in the two adjacent slots.

[0196] When the end insulating paper 25 includes the second insulating paper 252 , the second insulating paper 252 corresponding to the insulating papers 24 in two adjacent slots can be integrally formed to connect the insulating papers 24 in the two adjacent slots.

[0197] See also Fig.11 , Fig.11 This is a schematic structural diagram of the interlayer insulation paper 23 of some embodiments of the present application.

[0198] In some embodiments, please refer to Figure 6 and Figure 7 The end insulating papers 25 corresponding to the insulating papers 24 in the multiple slots are arranged in a ring shape.

[0199] Since the stator 20 has a plurality of stator slots 210 , an in-slot insulating paper 24 needs to be provided in each stator slot 210 to perform interlayer insulation on the winding 22 in the stator slot 210 . A plurality of in-slot insulating papers 24 are provided so that an in-slot insulating paper 24 is provided in each stator slot 210 .

[0200] The stator slots 210 of the stator 20 are arranged in an annular array, and accordingly, the radial ends of the stator slots 210 are annular. The end insulation papers 25 corresponding to the multiple slot insulation papers 24 are arranged in an annular shape, and the multiple slot insulation papers 24 can be connected so that the slot insulation papers 24 are installed in each stator slot 210, and the end insulation papers 25 perform interlayer insulation isolation on the radial ends of each winding 22.

[0201] The end insulating paper 25 is arranged in a ring shape, and a plurality of in-slot insulating papers 24 can be connected. When in use, the in-slot insulating papers 24 can be installed in each stator slot 210 of the stator 20 simultaneously, which is convenient for assembly and use; and also convenient for processing and manufacturing.

[0202] When the end insulating paper 25 includes the first insulating paper 251 , the first insulating paper 251 corresponding to the plurality of slot insulating papers 24 in the annular array is integrally formed, that is, the radial outer side of the annular first insulating paper 251 is connected to the plurality of slot insulating papers 24 .

[0203] When the end insulating paper 25 includes the second insulating paper 252 , the second insulating paper 252 corresponding to the multiple slot insulating papers 24 in the annular array is integrally formed, that is, the radial inner side of the annular second insulating paper 252 is connected to the multiple slot insulating papers 24 .

[0204] In some embodiments, when the end insulating paper 25 includes a first insulating paper 251 and a second insulating paper 252, the first insulating paper 251 is arranged in a ring shape, and the second insulating paper 252 is also arranged in a ring shape, and the interlayer insulating paper 23 includes a plurality of in-slot insulating papers 24, and the in-slot insulating papers 24 correspond one-to-one to the stator slots 210, the two ends of the in-slot insulating papers 24 are connected to the first insulating paper 251 and the second insulating paper 252. When in use, the entire interlayer insulating paper 23 can be installed on the stator core 21, which is convenient for installation and use.

[0205] See also Fig.12 , Fig.12 This is a schematic structural diagram of the interlayer insulation paper 23 of some embodiments of the present application.

[0206] In some embodiments, please refer to Figure 6 and Figure 7 The interlayer insulating paper 23 includes a plurality of blocks 230 , and the plurality of blocks 230 are arranged in a ring shape. Each block 230 includes at least one in-slot insulating paper 24 .

[0207] The block 230 refers to a region formed by connecting a plurality of in-slot insulation papers 24 and corresponding end insulation papers 25 into an integrated structure.

[0208] Since the multiple stator slots 210 of the stator 20 correspond to the multiple slot insulation papers 24, the stator slots 210 of the stator 20 are arranged in an annular array, and accordingly, the interlayer insulation paper 23 installed on the stator 20 is formed in an annular shape. The interlayer insulation paper 23 in an annular shape as a whole is divided into a plurality of blocks 230, so that each block 230 includes one or more slot insulation papers 24, which is more convenient to install and use.

[0209] The interlayer insulating paper 23 is arranged in a plurality of blocks 230 for easy processing and manufacturing; in addition, the plurality of stator slots 210 of the stator 20 are arranged in a ring shape, so that the plurality of blocks 230 are arranged in a ring shape, which can facilitate the installation of the in-slot insulating paper 24 in each stator slot 210, and facilitate the installation of the interlayer insulating paper 23 on the stator 20 for easy use.

[0210] In some embodiments, each block 230 is an integrally formed structure. Each block 230 is integrally formed, which means that each block 230 is integrally formed, such as using a larger insulating paper to stamp and form the corresponding block 230. Each block 230 is integrally formed to facilitate processing and manufacturing.

[0211] The windings 22 on the stator 20 are generally divided into multi-phase windings 22, and the timing of powering on different windings 22 is changed to generate a changing magnetic field, thereby driving the rotor 10 to rotate. The changing magnetic field is usually regional, that is, the same phase winding 22 often passes through several adjacent stator slots 210. In addition, one or more phase windings 22 are set in the channel of the stator slot 210, which makes the phase-to-phase voltage difference of the windings 22 in the stator slots 210 in some areas larger, while the phase-to-phase voltage difference of the windings 22 in the stator slots 210 in some areas is smaller.

[0212] In some embodiments, at least two blocks 230 have different breakdown resistance properties.

[0213] The breakdown resistance is also called the voltage breakdown resistance, which refers to the maximum voltage that the insulating paper can withstand without being broken down.

[0214] The breakdown resistance of at least two blocks 230 is set to be different. Blocks 230 with different breakdown resistance can be used according to the voltage difference between the windings 22 in the stator slots 210 to reduce costs and ensure good insulation performance between the windings 22.

[0215] In some embodiments, at least two blocks 230 have different dielectric strengths.

[0216] Dielectric withstand voltage, also known as insulation strength, refers to the ability of insulation to withstand voltage. When the voltage applied to insulation exceeds a certain critical value, the insulation will be damaged and lose its insulating function. The higher the voltage applied to the two ends of the insulator, the greater the electric field force on the charges in the material, and the easier it is for ionization collisions to occur, causing the insulator to break down. The lowest voltage that causes the insulator to break down is called the breakdown voltage of the insulator. The kilovolts of voltage that needs to be applied to break down a 1 mm thick insulating material is called the insulation withstand voltage of the insulating material, or simply insulation strength.

[0217] The insulation withstand voltage strengths of at least two blocks 230 are set to be different. Blocks 230 with different insulation withstand voltage strengths can be used according to the voltage difference between the windings 22 in the stator slots 210 to reduce costs and ensure good insulation performance between the windings 22.

[0218] In some embodiments, at least two of the blocks 230 have different thicknesses.

[0219] By setting the thickness of at least two blocks 230 to be different, blocks 230 of different thicknesses can be used according to the voltage difference between the windings 22 in the stator slots 210 to reduce costs and ensure good insulation performance between the windings 22 .

[0220] In some embodiments, the thickness of the block 230 ranges from 0.15 millimeters (mm) to 0.5 mm, such as 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm, 0.35 mm, 0.40 mm, 0.45 mm, 0.5 mm, etc. The use of a block 230 with a thickness of 0.15 mm to 0.5 mm has low cost, occupies a small space in the stator slot 210, and has good insulation performance. When the thickness of the block 230 is less than 0.15 mm, its breakdown resistance is weak, and it is easy to be broken down by the interlayer voltage of the winding 22, resulting in insulation failure. When the thickness of the block 230 is greater than 0.5 mm, it will occupy a larger space in the stator slot 210, reduce the full slot rate, cause a substantial increase in the volume of the stator 20, and also lead to an increase in the cost of the interlayer insulation paper 23.

[0221] In some embodiments, the block 230 includes a first block 2301, and the thickness of the first block 2301 ranges from 0.2 mm to 0.3 mm, such as 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.3 mm, etc.

[0222] The first block 2301 is set, and the thickness of the first block 2301 is in the range of 0.2mm-0.3mm. The first block 2301 can be used in the stator slot 210 with a moderate voltage difference between the windings 22, so as to achieve a more reasonable allocation of insulation performance, occupied space and cost. When the thickness of the first block 2301 is less than 0.2mm, a breakdown may occur in the area with a moderate voltage difference between the layers of the winding 22, resulting in insulation failure; when the thickness of the first block 2301 is greater than 0.3mm, the occupied space will increase, and the cost of the interlayer insulation paper 23 will increase.

[0223] In some embodiments, the block 230 includes a second block 2302, and the thickness of the second block 2302 ranges from 0.15 mm to 0.2 mm; for example, it may be 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.20 mm, etc.

[0224] The second block 2302 is set, and the thickness of the second block 2302 is in the range of 0.15mm-0.2mm. The second block 2302 can be used in the stator slot 210 where the voltage difference between the windings 22 is small, so as to achieve a more reasonable allocation of insulation performance, occupied space and cost. When the thickness of the second block 2302 is less than 0.15mm, the insulation performance of the second block 2302 is weak, and breakdown may also occur in the area where the voltage difference between the layers of the winding 22 is small, resulting in insulation failure; when the thickness of the second block 2302 is greater than 0.2mm, the occupied space will increase, and it will lead to an increase in the cost of the interlayer insulation paper 23.

[0225] In some embodiments, the block 230 includes a third block 2303, and the thickness of the third block 2303 ranges from 0.3 mm to 0.5 mm, such as 0.3 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.36 mm, 0.37 mm, 0.38 mm, 0.39 mm, 0.4 mm, 0.41 mm, 0.42 mm, 0.43 mm, 0.44 mm, 0.45 mm, 0.46 mm, 0.47 mm, 0.48 mm, 0.49 mm, 0.5 mm, etc.

[0226] The third block 2303 is set, and the thickness of the third block 2303 is in the range of 0.3mm-0.5mm. The third block 2303 can be used in the stator slot 210 where the voltage difference between the windings 22 is large, so as to achieve a more reasonable allocation of insulation performance, occupied space and cost. When the thickness of the third block 2303 is less than 0.3mm, the insulation performance of the third block 2303 is relatively weaker than that of the area where the voltage difference between the layers of the winding 22 is large, and breakdown may occur, resulting in insulation failure; when the thickness of the third block 2303 is greater than 0.5mm, the occupied space will increase, and the cost of the interlayer insulation paper 23 will increase.

[0227] The interlayer insulating paper 23 provided in some embodiments of the present application includes a plurality of slot insulating papers 24, and the ends of the slot insulating papers 24 are connected with end insulating papers 25, and the end insulating papers 25 and the slot insulating papers 24 are adapted to the shape of the winding 22 installed in the stator slot 210. The plurality of slot insulating papers 24 are arranged in an annular array, and the end insulating papers 25 include a first insulating paper 251 and a second insulating paper 252, the first insulating paper 251 is arranged in an annular shape, and the second insulating paper 252 is also arranged in an annular shape. The interlayer insulating paper 23 includes a plurality of slot insulating papers 24, and when the slot insulating papers 24 correspond to the stator slot 210 one by one, the two ends of the slot insulating papers 24 are connected to the first insulating paper 251 and the second insulating paper 252, and when this is used, the whole interlayer insulating paper 23 can be installed on the stator core 21, which is convenient for installation and use, and when the winding 22 is installed, the extrusion damage to the interlayer insulating paper 23 can be reduced to maintain good insulation performance.

[0228] The interlayer insulating paper 23 provided in some embodiments of the present application includes a plurality of blocks 230, and the plurality of blocks 230 are arranged in a ring shape. Each block 230 includes at least one in-slot insulating paper 24, and the end of the in-slot insulating paper 24 is connected with an end insulating paper 25, and the end insulating paper 25 and the in-slot insulating paper 24 are adapted to the shape of the winding 22 installed in the stator slot 210. When the winding 22 is installed, the extrusion damage to the interlayer insulating paper 23 can be reduced to maintain good insulation performance. The breakdown resistance of at least two blocks 230 is different, and blocks 230 with different breakdown resistance can be used according to the size of the voltage difference between the windings 22 in the stator slot 210 to reduce costs and maintain good insulation performance.

[0229] Please also read Figures 6 to 8 According to some embodiments of the present application, the present application also provides a stator 20, including the interlayer insulation paper 23 as described in any of the above embodiments. By setting the interlayer insulation paper 23, the interlayer insulation performance of the winding 22 in the stator 20 can be improved.

[0230] In some embodiments, the stator 20 further includes a stator core 21 and a winding 22. The side of the stator core 21 is provided with stator teeth 211, and stator slots 210 are formed between adjacent stator teeth 211. The winding 22 is placed in the stator slots 210, and the above-mentioned interlayer insulation paper 23 is provided between the layers of the winding 22. The interlayer insulation paper 23 is provided between the layers of the winding 22 to ensure good insulation performance between the layers of the winding 22.

[0231] In some embodiments, a multi-phase winding 22 is disposed in the stator slot 210 , and the above-mentioned interlayer insulating paper 23 is disposed between two adjacent phase windings 22 , so that the insulation performance of the interphase windings 22 is good.

[0232] According to some embodiments of the present application, the embodiments of the present application further provide an axial motor 100 , comprising the stator 20 as described in the above embodiments.

[0233] According to some embodiments of the present application, the embodiments of the present application further provide an electric drive assembly 1001, comprising the axial motor 100 as described in the above embodiments.

[0234] According to some embodiments of the present application, the embodiments of the present application further provide a driving device, including the axial motor 100 as described in the above embodiments; or including the electric drive assembly 1001 as described in the above embodiments.

[0235] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An interlayer insulating paper, characterized in that: It comprises in-slot insulation paper for being placed in a stator slot of a stator, and the end of the in-slot insulation paper is connected with end insulation paper; The end insulation paper and the slot insulation paper are adapted to the shape of the winding installed in the stator slot.

2. The interlayer insulating paper according to claim 1, characterized in that: The end insulating paper includes a first insulating paper, and the first insulating paper is arranged at an end of the insulating paper in the slot close to the radial inner side of the stator.

3. The interlayer insulating paper according to claim 2, characterized in that: The first insulating paper comprises: A first inner section is arranged to extend obliquely from the insulating paper in the slot toward one side of the insulating paper in the slot; and The second inner section is extended from an end of the first inner section away from the insulating paper in the slot toward a direction away from the insulating paper in the slot.

4. The interlayer insulating paper according to claim 3, characterized in that: The first inner section is transitionally connected to the insulating paper in the slot via a first inner arc section; and / or the second inner section is transitionally connected to the first inner section via a second inner arc section.

5. The interlayer insulating paper according to any one of claims 1 to 4, characterized in that: The end insulating paper includes second insulating paper, and the second insulating paper is arranged at one end of the insulating paper in the slot close to the radial outer side of the stator.

6. The interlayer insulating paper according to claim 5, characterized in that: The second insulating paper comprises: A first outer section is arranged to extend obliquely from the insulating paper in the slot toward one side of the insulating paper in the slot; and The second outer section is extended from an end of the first outer section away from the insulating paper in the slot toward a direction away from the insulating paper in the slot.

7. The interlayer insulating paper according to claim 6, characterized in that: The first outer segment is transitionally connected to the insulating paper in the slot via a first outer arc segment; and / or the second outer segment is transitionally connected to the first outer segment via a second outer arc segment.

8. The interlayer insulating paper according to any one of claims 1 to 7, characterized in that: The end insulating paper and the in-slot insulating paper are an integrally formed structure.

9. The interlayer insulating paper according to any one of claims 1 to 8, characterized in that: The interlayer insulating paper includes a plurality of in-slot insulating papers, and the plurality of in-slot insulating papers are connected into one body.

10. The interlayer insulating paper according to claim 9, characterized in that: An opening for allowing the stator teeth of the stator to pass through is provided between the insulating papers in two adjacent slots.

11. The interlayer insulating paper according to claim 9 or 10, characterized in that: A connecting portion is provided between two adjacent insulating papers in the slots, and a breakable mark that can be broken is provided at the connection between the connecting portion and the insulating papers in the slots.

12. The interlayer insulating paper according to any one of claims 9 to 11, characterized in that: The end of each of the insulating papers in the slots is provided with end insulating papers, and two adjacent end insulating papers are connected.

13. The interlayer insulating paper according to claim 12, characterized in that: The two adjacent end insulating papers are an integrally formed structure.

14. The interlayer insulating paper according to claim 13, characterized in that: The end insulating papers corresponding to the plurality of in-slot insulating papers are arranged in a ring shape.

15. The interlayer insulating paper according to any one of claims 1 to 14, characterized in that: The interlayer insulating paper includes a plurality of blocks, the plurality of blocks are arranged in a ring shape, and each of the blocks includes at least one in-slot insulating paper.

16. The interlayer insulating paper according to claim 15, characterized in that: Each of the blocks is an integrally formed structure.

17. The interlayer insulating paper according to claim 15 or 16, characterized in that: At least two of the blocks have different breakdown resistance properties.

18. The interlayer insulating paper according to claim 17, characterized in that: At least two of the blocks have different dielectric strength.

19. The interlayer insulating paper according to claim 17 or 18, characterized in that: At least two of the blocks have different thicknesses.

20. The interlayer insulating paper according to any one of claims 15 to 19, characterized in that: The thickness of the block ranges from 0.15 mm to 0.5 mm.

21. The interlayer insulating paper according to claim 20, characterized in that: The blocks include a first block, the thickness of the first block ranges from 0.2 mm to 0.3 mm; And / or, the block includes a second block, and the thickness of the second block ranges from 0.15 mm to 0.2 mm; And / or, the blocks include a third block, and the thickness of the third block ranges from 0.3 mm to 0.5 mm.

22. A stator, characterized in that: Comprising the interlayer insulating paper as described in any one of claims 1-21.

23. An axial motor, characterized in that: Comprising a stator as claimed in claim 22.

24. An electric drive assembly, characterized in that: Comprising an axial motor as claimed in claim 23.

25. A driving device, characterized in that: Includes the axial motor as described in claim 23; or includes the electric drive assembly as described in claim 24.

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