Rotary variable transducer stator assembly and electric drive system

Abstract

The utility model provides a kind of rotary transformer stator assembly and electric drive system, rotary transformer stator assembly includes rotary transformer cover, wiring assembly, circuit board and rotary transformer stator, wherein, rotary transformer cover has to avoid via;Wiring assembly has first pin and second pin, first pin passes through to avoid via to be used as the plug-in end of rotary transformer stator assembly;Second pin is welded with circuit board connection;Rotary transformer stator is connected with rotary transformer cover, and rotary transformer stator has third pin, third pin is welded with circuit board connection, to make second pin and third pin indirectly connect by circuit board, and make at least wiring assembly, circuit board, rotary transformer stator as integrated structure.The utility model solves the problem that the winding wire of rotary transformer stator assembly in prior art is inserted with PIN pin plug through flexible line, and flexible line needs to be inserted into rotary transformer cover, which increases the difficulty of operation and is prone to cutting line.

Description

Technical Field

[0001] This utility model relates to the field of electric equipment technology, and more specifically, to a resolver stator assembly and an electric drive system. Background Technology

[0002] With the continuous evolution and development of electric drive systems, higher demands are placed on their internal components, especially in terms of installation space, cost control, and reliability. Existing resolver stator assemblies connect the winding wires of the resolver stator to the PIN connector via flexible wires. Subsequently, during the assembly of the resolver stator and resolver cover, the flexible wires need to be inserted into the resolver cover, which results in wire cutting and seriously affects the performance and service life of the resolver stator assembly. Utility Model Content

[0003] The main objective of this invention is to provide a resolver stator assembly and an electric drive system to solve the problem in the prior art where the resolver stator winding wires are connected to the PIN pin plugs via flexible wires, and the flexible wires need to be inserted into the resolver cover, which increases the difficulty of operation and is prone to wire cutting.

[0004] To achieve the above objectives, according to one aspect of the present invention, a resolver stator assembly is provided, comprising a resolver cover, a wiring assembly, a circuit board, and a resolver stator, wherein the resolver cover has a clearance via; the wiring assembly has a first pin and a second pin, the first pin passing through the clearance via to serve as a plug-in terminal of the resolver stator assembly; the second pin is soldered to the circuit board; the resolver stator is connected to the resolver cover, and the resolver stator has a third pin, the third pin being soldered to the circuit board, so that the second pin and the third pin are indirectly connected through the circuit board, and at least the wiring assembly, the circuit board, and the resolver stator are integral structures.

[0005] In an exemplary embodiment, the circuit board extends radially along the resolver stator; the wiring assembly includes a plug base and a pin, the plug base extends axially along the resolver stator and has an axial through hole; the pin passes through the axial through hole and both ends of the pin extend out of the axial through hole, forming a first pin and a second pin respectively; wherein the first pin passes through a clearance through hole so that the plug end extends axially along the resolver stator.

[0006] In one exemplary embodiment, at least the plug base and the connector pin are integrally injection molded.

[0007] In one exemplary embodiment, at least the number of the second pins is the same as the number of the third pins.

[0008] In an exemplary embodiment, the resolver stator has a receiving area for receiving a circuit board, and a third pin and a positioning post protruding from the surface of the receiving area; a positioning hole for cooperating with the positioning post is provided at the position opposite to the positioning post on the circuit board.

[0009] In an exemplary embodiment, there are multiple second pins arranged in a rectangular shape; the circuit board has a first soldering area with multiple first solder points, each of which corresponds to and is soldered to one of the multiple second pins; there are multiple third pins arranged in an arc shape; the circuit board has a second soldering area with multiple second solder points, each of which corresponds to and is soldered to one of the multiple third pins, and the multiple second solder points are located below the multiple first solder points.

[0010] In one exemplary embodiment, there are at least two positioning holes, which are spaced apart on both sides of a plurality of first welding points arranged in a rectangular shape; the number of positioning posts is the same as the number of positioning holes.

[0011] In an exemplary embodiment, the resolver cover has a receiving cavity on the side facing the resolver stator, the receiving cavity being used to receive at least a portion of the wiring assembly; a guide post is provided protruding from the end of the resolver cover away from the resolver stator, the guide post extending axially along the resolver cover and having a clearance through hole extending axially along the resolver cover and penetrating both ends of the guide post, the clearance through hole communicating with the receiving cavity.

[0012] In one exemplary embodiment, the resolver cover is detachably connected to the resolver stator; or, the resolver cover and the resolver stator are connected by adhesive application.

[0013] According to another aspect of the present invention, an electric drive system is provided, including a resolver stator assembly, wherein the resolver stator assembly is the resolver stator assembly described above.

[0014] The present invention provides a resolver stator assembly, comprising a resolver cover, a wiring assembly, a circuit board, and a resolver stator. The resolver cover has a clearance via; the wiring assembly has a first pin and a second pin, the first pin passing through the clearance via to serve as a connector for the resolver stator assembly; the second pin is soldered to the circuit board; the resolver stator is connected to the resolver cover, and the resolver stator has a third pin, which is soldered to the circuit board, so that the second pin and the third pin are indirectly connected through the circuit board, and that at least the wiring assembly, the circuit board, and the resolver stator are integral structures.

[0015] The second and third pins are connected via a circuit board, eliminating the need for a flexible wire and ensuring reliable electrical connection between them. This eliminates the need to insert a flexible wire into the resolver cover when connecting the resolver stator to the resolver cover, preventing wire cutting and simplifying the assembly and production process of the resolver stator assembly. It also improves the reliability and stability of the resolver stator assembly and helps reduce its cost.

[0016] Replacing existing flexible wires with circuit boards provides a more stable and reliable electrical connection. The technology in this embodiment reduces the failure rate of the resolver stator assembly, improves production efficiency, and also provides more design flexibility for the electric drive system.

[0017] Furthermore, the number of assembly components in the resolver stator assembly is reduced to two main groups: the resolver stator, wiring assembly, and circuit board are integrated into a single unit. This integrated design achieves component compactness, reduces connection points between components, and improves the overall performance of the resolver stator assembly. By combining multiple components into a single unit, the integrated design simplifies the assembly process and improves the mechanical strength and electrical performance of the assembly. The technology in this embodiment reduces the failure rate of the resolver stator assembly, improves production efficiency, and also provides more design space for the electric drive system assembly. In other embodiments, further optimization of the integrated design can achieve modularization of the components, facilitating subsequent maintenance and upgrades. By reducing the number of assembly components, the structure and assembly process of the resolver stator assembly are simplified. The technology in this embodiment reduces production costs and improves production efficiency. In other embodiments, further optimization of the component design can reduce unnecessary structural parts, achieving even greater simplification of assembly components.

[0018] It should be noted that the second pin of the wiring assembly is connected to the circuit board (PCB) via soldering, as is the third pin. This soldering connection provides a stable and reliable electrical connection, ensuring the efficiency and quality of signal transmission. The soldering technique tightly connects the pins to the circuitry of the circuit board (PCB), avoiding poor contact or signal attenuation. The technology in this embodiment improves the electrical performance of the resolver stator assembly, reduces the failure rate, and also facilitates the automated production of the assembly. In other embodiments, the reliability and durability of the solder joints can be further improved by refining the soldering materials and processes. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of one side of the plug-in end of a resolver stator assembly according to an alternative embodiment of the present invention is shown;

[0021] Figure 2 It shows Figure 1 A side view structural schematic diagram of the resolver stator assembly in the image;

[0022] Figure 3 It shows Figure 1 An exploded view of the resolver stator assembly.

[0023] The above figures include the following reference numerals:

[0024] 10. Rotary cap; 11. Clearance hole; 12. Guide post;

[0025] 20. Wiring assembly; 21. First pin; 22. Second pin; 23. Plug base; 24. Wiring pin;

[0026] 30. Circuit board; 31. First solder joint; 32. Second solder joint; 33. Positioning hole;

[0027] 40. Resolver stator; 41. Third pin; 42. Accommodation area; 43. Positioning post. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] With the continuous evolution and development of electric drive systems, higher demands are placed on their internal components, especially in terms of installation space, cost control, and reliability. Existing resolver stator assemblies connect the winding wires of the resolver stator to the PIN connector via flexible wires. Subsequently, during the assembly of the resolver stator and resolver cover, the flexible wires need to be inserted into the resolver cover, which results in wire cutting and seriously affects the performance and service life of the resolver stator assembly.

[0030] Furthermore, existing resolver stator assemblies typically employ radial lead-out, where the winding wires of the resolver stator 40 are connected to the PIN connector via flexible wires and then radially led out from the resolver stator assembly. This structure was widely used in early electric drive systems. However, under current trends, the aforementioned radially led-out resolver stator assembly requires additional space to accommodate the flexible wires and occupies internal radial space within the electric drive system, limiting the overall layout of the system. In addition, the increased number of flexible wires not only increases the assembly complexity of the resolver stator assembly but also easily leads to wire cutting and pin damage, severely affecting the performance and lifespan of the resolver stator assembly. The radial lead-out of the resolver stator assembly reveals several significant shortcomings:

[0031] 1. Low space utilization efficiency: The radially output resolver stator 40 requires additional space to accommodate the flexible wires and sealing gaskets, which is particularly evident in highly integrated electric drive systems, limiting the overall layout and optimization design of the system.

[0032] 2. Reliability Issues: The flexible wire connections not only increase assembly complexity but are also susceptible to damage during assembly, such as wire cutting and pin damage, which directly affects the resolver's performance and lifespan. Furthermore, the presence of flexible wires increases the risk of subsequent failures, reducing the overall reliability of the electric drive system.

[0033] 3. Cost and efficiency issues: The multi-component resolver stator assembly requires multiple applications of adhesive for fixation, which not only consumes a large amount of materials but also increases labor costs and prolongs the production cycle. The use of flexible wires and the complexity of their assembly process pose challenges to both cost control and production efficiency.

[0034] 4. Process complexity: Traditional resolver stator assembly involves manual pin insertion and wire connection, both of which require high-precision operation, which can easily lead to instability in the production process and affect the consistency of product quality.

[0035] In summary, existing resolver stator assemblies have significant limitations in terms of space utilization, cost efficiency, and reliability, especially in modern electric drive systems that pursue miniaturization, integration, and high-efficiency production. Therefore, a new technical solution is urgently needed to overcome these shortcomings and achieve better performance and production efficiency. The technical solution of this application is an improvement measure proposed to address these problems, aiming to significantly improve the performance and applicability of resolver stator assemblies through structural and process innovations. However, the specific technical means, the technical problems solved, and the resulting technical effects will be elaborated in detail in subsequent chapters. Here, we mainly focus on discussing the limitations of existing technologies to provide a sufficient basis for comparison and explanation of the technical solution of this application.

[0036] To address the problem that existing resolver stator assemblies connect the resolver stator windings to the PIN plug via flexible wires, which require the flexible wires to be tucked into the resolver cover, increasing operational difficulty and increasing the risk of wire cutting, this invention provides a resolver stator assembly and an electric drive system. The electric drive system includes a resolver stator assembly, which is the resolver stator assembly described above and below.

[0037] like Figures 1 to 3 As shown, the resolver stator assembly includes a resolver cover 10, a wiring assembly 20, a circuit board 30, and a resolver stator 40. The resolver cover 10 has a clearance through hole 11. The wiring assembly 20 has a first pin 21 and a second pin 22. The first pin 21 passes through the clearance through hole 11 to serve as a plug-in terminal of the resolver stator assembly. The second pin 22 is soldered to the circuit board 30. The resolver stator 40 is connected to the resolver cover 10 and has a third pin 41. The third pin 41 is soldered to the circuit board 30 so that the second pin 22 and the third pin 41 are indirectly connected through the circuit board 30, and at least the wiring assembly 20, the circuit board 30, and the resolver stator 40 are integral structures.

[0038] The second pin 22 and the third pin 41 are connected via a circuit board 30, eliminating the need for a flexible wire. This ensures the reliability of the electrical connection between the second pin 22 and the third pin 41. It also eliminates the need to insert a flexible wire into the resolver cover 10 when connecting the resolver stator 40 to the resolver cover 10, avoiding the cutting of existing flexible wires. This simplifies the assembly and production process of the resolver stator assembly, improves the reliability and stability of the resolver stator assembly, and also helps to reduce the cost of the resolver stator assembly.

[0039] Replacing the existing flexible wires with circuit board 30 provides a more stable and reliable electrical connection. The technology in this embodiment reduces the failure rate of the resolver stator assembly, improves production efficiency, and also provides more design flexibility for the electric drive system.

[0040] Furthermore, the number of assembly components in the resolver stator assembly is reduced to two main groups: the resolver stator 40, wiring assembly 20, and circuit board 30 are integrated into a single unit. This integrated design achieves component compactness, reduces connection points between components, and improves the overall performance of the resolver stator assembly. By combining multiple components into a single unit, the integrated design simplifies the assembly process and improves the mechanical strength and electrical performance of the assembly. The technology in this embodiment reduces the failure rate of the resolver stator assembly, improves production efficiency, and also provides more design space for the electric drive system assembly. In other embodiments, further optimization of the integrated design can achieve modularization of the components, facilitating subsequent maintenance and upgrades. By reducing the number of assembly components, the structure and assembly process of the resolver stator assembly are simplified. The technology in this embodiment reduces production costs and improves production efficiency. In other embodiments, further optimization of the component design can reduce unnecessary structural parts, achieving further simplification of assembly components.

[0041] It should be noted that the second pin 22 of the wiring assembly 20 is connected to the circuit board 30 (PCB board) by soldering, and the third pin 41 is also soldered to the circuit board 30. This soldering connection provides a stable and reliable electrical connection, ensuring the efficiency and quality of signal transmission. The soldering technique tightly connects the pins to the circuitry of the circuit board 30 (PCB board), avoiding poor contact or signal attenuation. The technology in this embodiment improves the electrical performance of the resolver stator assembly, reduces the failure rate, and also facilitates the automated production of the assembly. In other embodiments, the reliability and durability of the solder joints can be further improved by refining the soldering materials and processes.

[0042] It should be noted that, in other embodiments of this application, other types of flexible circuits can be used to replace the flexible wires in order to adapt to different working environments and temperature requirements.

[0043] It should be noted that in this application, the wiring component 20 is a PIN connector, the wiring pin 24 is a PIN pin of the PIN connector, and the circuit board 30 is a PCB board.

[0044] like Figure 3As shown, the circuit board 30 extends radially along the resolver stator 40; the wiring assembly 20 includes a plug base 23 and a connector pin 24, wherein the plug base 23 extends axially along the resolver stator 40 and has an axial through hole; the connector pin 24 passes through the axial through hole, and both ends of the connector pin 24 protrude from the axial through hole, forming a first pin 21 and a second pin 22 respectively; wherein the first pin 21 passes through a clearance through hole 11 so that the plug end extends axially along the resolver stator 40. In this way, the second pin 22 of the wiring assembly 20 is connected to the third pin 41 of the winding wire of the resolver stator 40 by an axial conversion method. The axial conversion method simplifies the electrical connection and improves the reliability of the connection. In the axial connection circuit design via circuit board 30 (PCB), the third pin 41 of the winding wire of resolver stator 40 is directly connected to the second pin 22 of wiring assembly 20. Furthermore, the first pin 21 of wiring assembly 20 passes through the clearance via 11, thereby allowing the insertion end of the resolver stator assembly to extend axially along the resolver stator 40, eliminating signal loss and electrical interference that may occur with traditional radial connections. The technology in this embodiment improves the signal transmission efficiency of the resolver stator assembly, reduces electrical interference, and enhances the overall performance of the resolver stator assembly. In other embodiments, the stability of signal transmission and the reduction of electromagnetic interference can be further improved by optimizing the electrical design of the axial connection.

[0045] It should be noted that in this application, at least the plug base 23 and the connector pin 24 are integrally injection molded. This integrated injection molding technology ensures the structural strength and electrical performance of the wiring assembly 20, while simplifying the manufacturing process. Injection molding fixes the connector pin 24 in a specific position, preventing displacement or damage to the first pin 21 and the second pin 22 formed by the connector pin 24 during subsequent assembly. The technology in this embodiment improves the production efficiency of the assembly, reduces the risk of damage to the first pin 21 and the second pin 22, and enhances the overall performance of the wiring assembly 20. In other embodiments, different injection molding materials can be selected to adapt to different working environments and temperature requirements.

[0046] It should be noted that, in this application, at least the number of the second pin 22 is the same as the number of the third pin 41.

[0047] It should be noted that in this application, the resolver stator 40 also includes a stator injection molding section, which is directly connected to the third pin 41. This direct connection simplifies the electrical connection and improves its reliability. By combining the third pin 41 of the winding wires of the resolver stator 40 with the stator injection molding section during the injection molding process, the stability of the electrical connection and its mechanical strength are ensured. The technology in this embodiment simplifies the production process, reduces production costs, and simultaneously improves the electrical performance and mechanical stability of the component. In other embodiments, a tighter electrical connection can be achieved by improving the injection molding process, thereby improving the reliability and durability of the connection.

[0048] like Figure 3 As shown, the resolver stator 40 has a receiving area 42 for receiving the circuit board 30. A third pin 41 and a positioning post 43 protrude from the surface of the receiving area 42. A positioning hole 33 is provided on the circuit board 30 at a position opposite to the positioning post 43 for engaging with the positioning post 43. Thus, the design of the receiving area 42 ensures reliable reception of the circuit board 30 and helps save overall axial space in the resolver stator assembly. Furthermore, the engagement of the positioning post 43 and the positioning hole 33 ensures reliable positioning and installation of the circuit board 30.

[0049] like Figure 3 As shown, there are multiple second pins 22, which are arranged in a rectangular shape; the circuit board 30 has a first soldering area with multiple first solder points 31, which correspond one-to-one with the multiple second pins 22 and are soldered to each other; there are multiple third pins 41, which are arranged in an arc shape; the circuit board 30 has a second soldering area with multiple second solder points 32, which correspond one-to-one with the multiple third pins 41 and are soldered to each other, and the multiple second solder points 32 are located below the multiple first solder points 31.

[0050] like Figure 3 As shown, there are at least two positioning holes 33, and at least two positioning holes 33 are spaced apart on both sides of a plurality of first welding points 31 arranged in a rectangular shape; the number of positioning posts 43 is the same as the number of positioning holes 33.

[0051] like Figure 3 As shown, the resolver cover 10 has a receiving cavity on the side facing the resolver stator 40, which is used to receive at least part of the wiring assembly 20; a guide post 12 is provided on the end of the resolver cover 10 away from the resolver stator 40. The guide post 12 extends along the axial direction of the resolver cover 10 and has a clearance through hole 11. The clearance through hole 11 extends along the axial direction of the resolver cover 10 and passes through both ends of the guide post 12. The clearance through hole 11 communicates with the receiving cavity.

[0052] It should be noted that, in one embodiment of this application (not shown), the resolver cover 10 is detachably connected to the resolver stator 40. This ensures ease of installation and removal between the resolver cover 10 and the resolver stator 40.

[0053] It should be noted that in this application, the resolver cover 10 and the resolver stator 40 are connected by adhesive. This adhesive connection provides sealing and fixation between the components, ensuring their waterproof and dustproof performance. The use of adhesive fills the tiny gaps between the components, enhancing their sealing and mechanical strength. The technology in this embodiment improves the environmental adaptability of the components and extends their service life. In other embodiments, the problem of adhesive performance degradation under extreme temperatures can be addressed by using other types of sealing materials, such as rubber gaskets.

[0054] This application integrates the wiring assembly 20, circuit board 30 (PCB), and resolver stator 40 into a single design, employing integrated injection molding and automated welding technology to achieve efficient production and stable operation of the resolver stator assembly. During operation, the third pin 41 of the winding wire is directly connected to the second pin 22 of the wiring assembly 20 via the circuit design of the circuit board 30 (PCB). Signal transmission is achieved through the axial connection pin 24, avoiding signal loss and electrical interference that may occur with traditional flexible wire solutions. Simultaneously, the resolver stator 40 is connected to the wiring assembly 20 and circuit board 30 (PCB) using adhesive bonding, ensuring the sealing and mechanical strength of the resolver stator assembly and improving its environmental adaptability and service life. The entire process demonstrates the innovation and optimization of this application's technical solution in structural design, electrical connection, and sealing fixation, achieving high performance and high reliability of the assembly.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0059] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A resolver stator assembly, characterized in that, include: A resolver cover (10) having a clearance through hole (11); Wiring assembly (20) having a first pin (21) and a second pin (22), the first pin (21) passing through the clearance hole (11) to serve as the plug-in terminal of the resolver stator assembly; Circuit board (30), the second pin (22) is soldered to the circuit board (30); A resolver stator (40) is connected to the resolver cover (10), and the resolver stator (40) has a third pin (41), which is soldered to the circuit board (30) so that the second pin (22) and the third pin (41) are indirectly connected through the circuit board (30), and at least the wiring assembly (20), the circuit board (30), and the resolver stator (40) are integral structures.

2. The resolver stator assembly according to claim 1, characterized in that, The circuit board (30) extends radially along the resolver stator (40); The wiring assembly (20) includes: A plug base (23) extends along the axial direction of the resolver stator (40) and has an axial through hole; A connector (24) is inserted through the axial through hole, and both ends of the connector (24) protrude through the axial through hole to form the first pin (21) and the second pin (22) respectively. The first pin (21) passes through the clearance hole (11) so that the plug end extends along the axial direction of the resolver stator (40).

3. The resolver stator assembly according to claim 2, characterized in that, At least the plug base (23) and the connector pin (24) are integrally injection molded.

4. The resolver stator assembly according to claim 1, characterized in that, At least the number of the second pins (22) is the same as the number of the third pins (41).

5. The resolver stator assembly according to claim 1, characterized in that, The resolver stator (40) has a receiving area (42) for receiving the circuit board (30), and the third pin (41) and the positioning post (43) are protruding from the surface of the receiving area (42). The circuit board (30) has a positioning hole (33) at the position opposite to the positioning post (43) for cooperating with the positioning post (43).

6. The resolver stator assembly according to claim 5, characterized in that, There are multiple second pins (22), and the multiple second pins (22) are arranged in a rectangular shape; The circuit board (30) has a first soldering area, the first soldering area has a plurality of first soldering points (31), the plurality of first soldering points (31) correspond one-to-one with a plurality of second pins (22) and are soldered to each other respectively; There are multiple third pins (41), and the multiple third pins (41) are arranged in an arc shape; The circuit board (30) has a second soldering area with a plurality of second soldering points (32). The plurality of second soldering points (32) correspond one-to-one with the plurality of third pins (41) and are soldered to each other. The plurality of second soldering points (32) are located below the plurality of first soldering points (31).

7. The resolver stator assembly according to claim 6, characterized in that, There are at least two positioning holes (33), and at least two positioning holes (33) are spaced apart on both sides of a plurality of first welding points (31) arranged in a rectangular shape; The number of positioning pins (43) is the same as the number of positioning holes (33).

8. The resolver stator assembly according to claim 5, characterized in that, The resolver cover (10) has a receiving cavity on the side facing the resolver stator (40), the receiving cavity being used to receive at least part of the wiring assembly (20); The end of the resolver cover (10) opposite to the resolver stator (40) is provided with a guide post (12). The guide post (12) extends along the axial direction of the resolver cover (10) and has the clearance through hole (11). The clearance through hole (11) extends along the axial direction of the resolver cover (10) and passes through both ends of the guide post (12). The clearance through hole (11) communicates with the receiving cavity.

9. The resolver stator assembly according to any one of claims 1 to 8, characterized in that, The resolver cover (10) is detachably connected to the resolver stator (40); or, The resolver cover (10) and the resolver stator (40) are connected by adhesive.

10. An electric drive system, characterized in that, It includes a resolver stator assembly, wherein the resolver stator assembly is the resolver stator assembly according to any one of claims 1 to 9.

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