stator assembly

Abstract

The utility model provides a kind of stator assembly, including coil assembly and circuit board assembly, coil assembly includes winding, first wire-wound pin, second wire-wound pin and coil framework, circuit board assembly includes substrate and system integration module, winding is electrically connected with system integration module by first wire-wound pin, second wire-wound pin, substrate, coil framework includes winding tube, winding is wound in winding tube, stator assembly includes accommodating portion, accommodating portion is recessed from the first outer side wall of stator assembly towards winding tube, at least part accommodating portion is between first wire-wound pin and second wire-wound pin, define the outer diameter of winding tube as d1, the width of accommodating portion is A, the w2 of system integration module, d1>A>w2, at least part system integration module is located in the accommodating groove of accommodating portion, so that the setting of circuit board assembly and coil assembly is relatively compact, in turn be favorable to reduce the volume of stator assembly.

Description

Technical Field

[0001] This application relates to fluid control technology, specifically to a stator assembly. Background Technology

[0002] The stator assembly is an important component of the electric actuator, including the circuit board assembly and the coil assembly. The circuit board assembly is electrically connected to the coil assembly and is located outside the coil assembly. The relatively loose arrangement of the circuit board assembly and the coil assembly results in a relatively large size of the stator assembly. Utility Model Content

[0003] The purpose of this application is to provide a stator assembly that helps to reduce the size of the stator assembly.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] This application provides a stator assembly, including a coil assembly and a circuit board assembly. The coil assembly includes a winding, a first winding pin, a second winding pin, and a coil bobbin. The circuit board assembly includes a substrate and a system integration module. The winding and the system integration module are electrically connected via the first winding pin, the second winding pin, and the substrate. The coil bobbin includes a winding tube, and the winding is wound around the winding tube. The stator assembly includes a receiving portion, at least a portion of which is recessed from a first outer sidewall of the stator assembly toward the winding tube. At least a portion of the receiving portion is located between the first winding pin and the second winding pin. The outer diameter of the winding tube is defined as d1, the width of the receiving portion as A, and the width of the system integration module as w2, where d1 > A > w2. At least a portion of the system integration module is located in the receiving groove of the receiving portion.

[0006] In the stator assembly provided in this application, d1 > A > w2, and at least some of the system integration modules are located in the receiving slot of the receiving part, which makes the arrangement of the circuit board assembly and the coil assembly relatively compact, thereby helping to reduce the volume of the stator assembly. Attached Figure Description

[0007] Figure 1 A three-dimensional structural schematic diagram of the stator assembly from one perspective is provided for embodiments of this application;

[0008] Figure 2 for Figure 1 A cross-sectional structural diagram of the middle stator assembly, with the central axis of the figure representing a point located at the center of the winding tube;

[0009] Figure 3 for Figure 2 A schematic diagram of the structure of the coil frame from one perspective;

[0010] Figure 4 for Figure 2 Another structural diagram of the coil frame from a different perspective;

[0011] Figure 5 for Figure 1 Another cross-sectional view of the middle stator assembly;

[0012] Figure 6 for Figure 1 An exploded view of the middle stator assembly;

[0013] Figure 7 for Figure 6 A three-dimensional structural diagram of a coil assembly;

[0014] Figure 8 for Figure 6 An exploded view of a circuit board assembly;

[0015] Figure 9 for Figure 6 A structural schematic diagram of the two coil components from one perspective;

[0016] Figure 10 for Figure 8 A cross-sectional structural diagram of the system integration module;

[0017] Figure 11 for Figure 10 A schematic diagram of the circuit principle of a chip;

[0018] In the diagram: 100-Stator assembly, 110-Coil assembly, 120-Circuit board assembly, 130-Plastic coating, 140-Cover plate, 150-External pin, P1-First coil assembly, P2-Second coil assembly, 111-Coil bobbin, 112-Winding pin, 113-Winding, 114-Claw pole housing, 1111-Winding tube, 1112-First terminal receiving part, 1113-Second terminal receiving part, 1114-End plate, 1112a-First recess, 1113a-Second recess, 1121-First segment, 1122-Second segment, 1131-First lead segment, 1132-Spiral segment, 1133-Second lead segment, 1141-Notch, 121-System integration module, 122-Substrate, 122 1-First conductive part, 1222-Second conductive part, 1223-Third conductive part, 1224-First side, 1225-Second side, 131-Box body, 132-First terminal encapsulation part, 133-Second terminal encapsulation part, 1321-First outer side wall, 134-First outer peripheral wall, 135-Interface part, 136-Accommodation part, 1311-Box body cavity, 1312-Second opening, 1351-Interface cavity, 1361-Accommodation groove, 1362-First opening, S-First surface, L-Central axis, 1211-Peripheral device, 1212-Chip, 1213-Encapsulation layer, 1212a-Signal processing module, 1212b-Communication module, 1212c-Motor drive module, 1212d-Power management module. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments are described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0020] The following is combined Figures 1 to 11 This application provides a detailed description of a stator assembly 100 provided in an embodiment. Such a stator assembly 100 includes a coil assembly 110, a circuit board assembly 120, a plastic-coated portion 130, a cover plate 140, and external pins 150.

[0021] like Figure 1 and Figure 2In the embodiment shown, the coil assembly 110 includes a winding 113, a coil frame 111, and two winding pins 112, which are a first winding pin and a second winding pin, respectively. The circuit board assembly 120 includes a substrate 122 and a system integration module 121. The winding 113 and the system integration module 121 are electrically connected through the first winding pin, the second winding pin, and the substrate 122. At least a portion of the system integration module 121 is located between the first winding pin and the second winding pin. The coil frame 111 includes a winding tube 1111, and the winding 113 is wound around the winding tube 1111. The stator assembly 100 includes a receiving portion 136, which is located from the first winding tube of the stator assembly 100. The outer wall 1321 is recessed toward the winding tube 1111. At least a portion of the receiving portion 136 is located between the first winding pin and the second winding pin. The outer diameter of the winding tube 1111 is defined as d1, the width of the receiving portion 136 is A, and the width of the system integration module 121 is w2, where d1 > A > w2. At least a portion of the system integration module 121 is located in the receiving groove 1361 of the receiving portion 136, so that the system integration module 121 can be located in the receiving portion 136 between the first winding pin and the second winding pin. This allows the coil assembly 110 and the circuit board assembly 120 to be arranged relatively compactly, which is beneficial to reducing the size of the stator assembly 100 and thus meeting the miniaturization design requirements of the stator assembly 100.

[0022] It should be noted that a first direction is defined, which is perpendicular to the thickness direction of the substrate 122 and is perpendicular to the axial direction of the winding tube 1111. The distance between the inner sidewalls of the receiving portion 136 along the first direction is A, and the distance between the outer sidewalls of the system integration module 121 along the first direction is w2.

[0023] like Figure 2 , Figure 3 and Figure 7In the embodiment shown, the coil bobbin 111 includes two terminal receiving portions, each corresponding to one of two winding pins 112. The two terminal receiving portions are a first terminal receiving portion 1112 and a second terminal receiving portion 1113. The first terminal receiving portion 1112 is correspondingly disposed with a first winding pin, and the second terminal receiving portion 1113 is correspondingly disposed with a second winding pin. A portion of the first winding pin is located within the first terminal receiving portion 1112, and a portion of the second winding pin is located within the second terminal receiving portion 1113. The first winding pin is in a limiting engagement with the first terminal receiving portion 1112, and the second winding pin is in a limiting engagement with the second terminal receiving portion 1113. With limiting fit, the outer end wall of the coil frame 111 is defined as the first outer end wall, the first terminal receiving portion 1112 protrudes from the first outer end wall, and the second terminal receiving portion 1113 protrudes from the first outer end wall. The minimum distance between the inner side wall of the first terminal receiving portion 1112 and the inner side wall of the second terminal receiving portion 1113 is defined as w1, d1>w1≥A. At least part of the recessed portion is located between the first terminal receiving portion 1112 and the second terminal receiving portion 1113, so that the recessed portion utilizes the space between the first terminal receiving portion 1112 and the second terminal receiving portion 1113. This arrangement makes the structure of the stator assembly 100 more compact.

[0024] It should be noted that the first terminal receiving portion 1112 and the second terminal receiving portion 1113 are arranged along the first direction. The first terminal receiving portion 1112 is located approximately on one outer side of the receiving portion 136 along the first direction, and the second terminal receiving portion 1113 is located approximately on the other outer side of the receiving portion 136 along the first direction. The inner sidewall of the first terminal receiving portion 1112 is close to the receiving portion 136, and the inner sidewall of the second terminal receiving portion 1113 is close to the receiving portion 136. The plane containing the inner sidewall of the first terminal receiving portion 1112 is parallel to the plane containing the inner sidewall of the second terminal receiving portion 1113.

[0025] In some embodiments, the coil frame 111 is injection molded with the first winding pin and the second winding pin as inserts to improve the overall structural strength of the coil frame 111, the first winding pin, and the second winding pin.

[0026] In some embodiments, w1=A, and the inner wall of the receiving portion 136 includes the inner sidewall of the first terminal receiving portion 1112 and the inner sidewall of the second terminal receiving portion 1113, i.e., d1>w1>w2.

[0027] like Figure 5 , Figure 6 and Figure 9In the embodiment shown, there are two coil assemblies 110, namely a first coil assembly P1 and a second coil assembly P2. The structure of the first coil assembly P1 is basically the same as that of the second coil assembly P2. The first coil assembly P1 and the second coil assembly P2 are coaxial and arranged along the axial direction of the stator assembly 100. The first coil assembly P1 and the second coil assembly P2 are arranged back to back. A first surface S is defined. The central axis L of the stator assembly 100 passes through the first surface S. The plane containing the first surface S is parallel to the thickness direction of the substrate 122. The stator assembly 100 is arranged approximately symmetrically about the first surface S. The first surface S is defined as the inner wall of the first terminal receiving portion 1112. The minimum distance between the two sides is w3, the minimum distance between the first surface S and the inner wall of the second terminal receiving portion 1113 is w4, the width of the first terminal receiving portion 1112 is t1, w4 > w3 + t1, at least a portion of the first terminal receiving portion 1112 of the first coil assembly P1 is located between the receiving portion 136 and the second terminal receiving portion 1113 of the second coil assembly P2, and at least a portion of the first terminal receiving portion 1112 of the second coil assembly P2 is located between the receiving portion 136 and the second terminal receiving portion 1113 of the first coil assembly P1. This arrangement allows the coil frame 111 to be compactly arranged with the circuit board assembly 120, which helps to reduce the volume of the stator assembly 100. Moreover, it also allows the two first winding pins and the two second winding pins to be compactly arranged on the substrate 122, which helps to improve the effective utilization rate of the substrate 122.

[0028] In this embodiment, t1=t2, that is, the width of the first terminal receiving portion 1112 is equal to the width of the second terminal receiving portion 1113.

[0029] In this embodiment, the width of the second terminal receiving portion 1113 is defined as t2, d1 / 2 > w3 + t1, d1 / 2 > w4 + t2, so that the first terminal receiving portion 1112 does not protrude relative to the winding tube 1111, and the second single-element receiving portion does not protrude relative to the winding tube 1111. This arrangement makes the structure of the coil frame 111 more reasonable and helps to reduce the volume of the coil frame 111. Here, d1 / 2 represents d1 divided by 2.

[0030] like Figure 9In the embodiment shown, the projection of the first terminal receiving portion 1112 of the first coil assembly P1 along the first direction partially overlaps with the projection of the second terminal receiving portion 1113 of the second coil assembly P2 along the first direction, and the projection of the second terminal receiving portion 1113 of the first coil assembly P1 along the first direction partially overlaps with the projection of the first terminal receiving portion 1112 of the second coil assembly P2 along the first direction. This arrangement allows the terminal receiving portions of the first coil assembly P1 and the second coil assembly P2 to be misaligned in height but mutually restrained, thus facilitating the restrained installation of the first coil assembly P1 and the second coil assembly P2 together.

[0031] like Figure 9 In the embodiment shown, the projection of the winding pin 112 of the first coil assembly P1 along the first direction does not overlap with the projection of the winding pin 112 of the second coil assembly P2 along the first direction. This helps to reduce the problem of mutual interference when the circuit board assembly 120 is assembled with the first coil assembly P1 and the second coil assembly P2. It should be noted that the problem of mutual interference when the circuit board assembly 120 is assembled with the first coil assembly P1 and the second coil assembly P2 may be caused by the first winding pin and the second winding pin being too close together during the soldering of the substrate 122 with the first winding pin and the second winding pin, resulting in solder bridging.

[0032] like Figure 2 In the embodiment shown, a second direction is defined, which is perpendicular to the first direction and perpendicular to the axis of the winding tube 1111. The projection of the system integration module 121 along the second direction overlaps with the projection of the winding tube 1111 along the second direction. The projection of the system integration module 121 along the second direction does not overlap with the projection of the first terminal receiving portion 1112 along the second direction, nor does it overlap with the projection of the second terminal receiving portion 1113 along the second direction. This ensures that the first terminal receiving portion 1112 is not located between the winding tube 1111 and the system integration module 121, and the second terminal receiving portion 1113 is also not located between the winding tube 1111 and the system integration module 121. This allows the terminal receiving portions to not obstruct the system integration module 121 from getting closer to the winding tube 1111, thereby enabling the system integration module 121 to be positioned close to the winding tube 1111 between the first terminal receiving portion 1112 and the second terminal receiving portion 1113. This, in turn, helps to reduce the volume of the stator assembly 100.

[0033] like Figure 6 and Figure 7In the embodiment shown, the winding pin 112 includes a first segment 1121. The length direction of the first segment 1121 is parallel to the second direction. The first segment 1121 is electrically connected to the circuit board assembly 120. The projection of the first segment 1121 of the first coil assembly P1 along the first direction does not overlap with the projection of the first segment 1121 of the second coil assembly P2 along the first direction, so that the first segment 1121 of the first coil assembly P1 and the first segment 1121 of the second coil assembly P2 are staggered. This results in a relatively large gap between the first segment 1121 of the first coil assembly P1 and the first segment 1121 of the second coil assembly P2, which helps to reduce mutual interference between the connection structure of the first coil assembly P1 and the circuit board assembly 120 and the connection structure of the second coil assembly P2 and the circuit board assembly 120.

[0034] like Figure 6 and Figure 7 In the embodiment shown, the winding pin 112 includes a second segment 1122, which is integrally formed with the first segment 1121. The second segment 1122 is electrically connected to the winding 113. The length direction of the second segment 1122 is parallel to the axial direction of the winding tube 1111. The second segment 1122 of the first coil assembly P1 extends from the corresponding first segment 1121 toward the axial side of the winding tube 1111. The second segment 1122 of the second coil assembly P2 extends from the corresponding first segment 1121 toward the other axial side of the winding tube 1111. This makes the second segments 1122 of the first coil assembly P1 and the second segments 1122 of the second coil assembly P2 staggered, which helps to reduce the problem of mutual interference between the second segments 1122 of the two coil assemblies 110.

[0035] like Figure 8 , Figure 10 and Figure 11 In the embodiment shown, the system integration module 121 includes a chip 1212, peripheral devices 1211, and a packaging layer 1213. The chip 1212 includes a signal processing module 1212a, a communication module 1212b, and a motor drive module 1212c. The packaging layer 1213 encapsulates the peripheral devices 1211 and the chip 1212, so that the peripheral devices 1211, signal processing module 1212a, communication module 1212b, and motor drive module 1212c are encapsulated within a single packaging layer 1213. This results in a more compact packaging structure, making the system integration module 121 relatively small in size, which is beneficial for reducing the size of the substrate 122, and consequently, for reducing the size of the circuit board assembly 120. The chip 1212 also includes a power management module 1212d, which is also encapsulated within the same packaging layer 1213, further contributing to a reduction in the size of the circuit board assembly 120.

[0036] The communication module 1212b is either a LIN communication module 1212b or a CAN communication module 1212b. The LIN communication module 1212b enables data interaction based on LIN communication technology. LIN communication technology (Local Interconnect Network) is a low-cost serial communication technology that is beneficial for cost reduction in electric valve applications. The LIN communication module 1212b can communicate with at least one of the sensors in the vehicle's thermal management system and the electric valve. The CAN communication module 1212b enables data interaction based on CAN communication technology. CAN communication technology (Controller Area Network) is a serial communication technology that reduces wiring, reduces message collisions, provides high reliability, and allows for long-distance transmission, making it suitable for communication between electric valves and the thermal management system in automobiles.

[0037] The signal processing module 1212a can receive and process signals from the communication module 1212b, the motor drive module 1212c, and the power management module 1212d. It can also generate and send signals to the communication module 1212b, the motor drive module 1212c, and the power management module 1212d, so that the system integration module 121121 has control function, motor drive function, communication function, and power management function. The system integration module 121121 can supply power to the stator assembly 100, control the electrical signals applied to the winding 113113, thereby controlling the magnetic field changes generated by the winding 113113, and can also communicate with the thermal management system.

[0038] like Figure 8 , Figure 10 and Figure 11 In the embodiment shown, the system integration module 121 is cubic in shape, and the cross-sectional outline of the receiving part 136 is rectangular. This arrangement is beneficial to improving the compatibility between the system integration module 121 and the receiving groove 1361.

[0039] In some embodiments, the system integration module 121 may be a cylinder, and the outer diameter of the system integration module 121 is w2.

[0040] like Figure 6In the embodiment shown, the stator assembly 100 includes a housing portion 131, a portion of which protrudes from a first outer peripheral wall 134. The first outer peripheral wall 134 generally surrounds the coil assembly 110. The substrate 122 is welded and fixed to the first winding pin and the second winding pin and is located in the housing cavity 1311 of the housing portion 131. The housing cavity 1311 communicates with the receiving groove 1361 through a first opening 1362 of the receiving portion 136. The first opening 1362 is formed on the first outer peripheral wall 134 and located in the housing cavity 1311. This arrangement allows the stator assembly 100 to seal the circuit board assembly 120, the first winding pin, and the second winding pin, thereby improving the control reliability of the stator assembly 100. Furthermore, a portion of the box body 131 protrudes from the first outer peripheral wall 134, so that the first outer peripheral wall 134 can serve as part of the bottom of the box body 131, eliminating the need to provide a separate bottom for the box body 131. This simplifies the structure of the box body 131 and helps to meet the design requirements for miniaturization of the stator assembly 100.

[0041] In some embodiments, the box body 131 protrudes from the first outer peripheral wall 134, such that the first outer peripheral wall 134 serves as the bottom of the box body 131.

[0042] like Figure 1 and Figure 6 In the embodiment shown, the housing portion 131 protrudes outward toward the stator assembly 100 and forms a second opening 1312. The cover plate 140 is laser welded to the housing portion 131 and seals the second opening 1312.

[0043] As shown in the figure, the width of the box body 131 is defined as w5, and the diameter of the first outer peripheral wall 134 is defined as d2, where d2 ≥ w5.

[0044] like Figure 2In the embodiment shown, the stator assembly 100 includes two terminal encapsulation portions, each corresponding to one of the two winding pins 112. The two terminal encapsulation portions are a first terminal encapsulation portion 132 and a second terminal encapsulation portion 133. The winding 113 is welded and fixed to the first winding pin and located inside the first terminal encapsulation portion 132. The winding 113 is welded and fixed to the second winding pin and located in the second terminal encapsulation portion 133. The terminal encapsulation portions cover the welded portion between the winding 113 and the winding pin 112, thus protecting the welded portion between the winding 113 and the winding pin 112 and improving the product reliability of the stator assembly 100. The first terminal encapsulation portion 132 protrudes from the first outer peripheral wall 134, and the second terminal encapsulation portion 133 protrudes from the first outer peripheral wall 134. The first terminal encapsulation portion 132 and the second terminal encapsulation portion 133 are located in the housing cavity 1311. The housing portion 131 protects the first terminal encapsulation portion 132 and the second terminal encapsulation portion 133, which is more conducive to the product reliability of the stator assembly 100.

[0045] like Figure 2 and Figure 5 In the embodiment shown, the first outer sidewall 1321 is located on the side of the first terminal encapsulation portion 132 away from the first outer peripheral wall 134 and the side of the second encapsulation portion 133 away from the first outer peripheral wall 134. The first outer sidewall 1321 is also located in the cavity of the housing. A portion of the receiving portion 136 is located between the inner sidewalls of the first terminal encapsulation portion 132 and the second terminal encapsulation portion 133. Another portion of the receiving portion 136 is recessed inward from the first outer peripheral wall 134.

[0046] like Figure 7 In the embodiment shown, the winding 113 is made of enameled wire. Along the length of the enameled wire, the winding 113 includes a first lead segment 1131, a helical segment 1132, and a second lead segment 1133. The helical segment 1132 is located between the first lead segment 1131 and the second lead segment 1133. The helical segment 1132 is wound around the winding tube 1111. The first lead segment 1131 abuts against and is wound around and welded to the first segment 1121 of the first winding pin. The second lead segment 1133 abuts against and is wound around and welded to the first segment 1121 of the second winding pin. The winding 113 is in a taut state. Since d1 / 2 > w3 + t1 and d1 / 2 > w4 + t2, the first lead segment 1131 is inclined from the helical segment 1132 toward the plane where the first surface S is located, and the second lead segment 1133 is inclined from the helical segment 1132 toward the plane where the first surface S is located, which helps the winding 113 to remain taut.

[0047] like Figure 3In the embodiment shown, the winding tube 1111 is in the shape of a circular tube, and the winding 113 is in a taut state, which allows the roundness of the spiral segment 1132 of the winding 113 to be higher, which is beneficial to improving the uniformity of the magnetic field generated by the winding 113, and thus beneficial to improving the driving performance of the stator assembly 100.

[0048] like Figure 6 In the embodiment shown, the first terminal receiving portion 1112 includes a first recessed portion 1112a, which is recessed inward from the inner sidewall of the first terminal receiving portion 1112. The second terminal receiving portion 1113 includes a second recessed portion 1113a, which is recessed inward from the inner sidewall of the second terminal receiving portion 1113. The first lead segment 1131 is limited to the first recessed portion 1112a, and the second lead segment 1133 is limited to the second recessed portion 1113a.

[0049] like Figure 7 In the embodiment shown, the first recess 1112a is located on the side of the inner wall of the first terminal receiving portion 1112 near the first outer end wall, and the second recess 1113a is located on the side of the second terminal receiving portion 1113 near the first outer end wall.

[0050] like Figure 5 and Figure 6 In the embodiment shown, the substrate 122 is electrically connected to the external pin 150. The external pin 150, the first winding pin, and the second winding pin are arranged circumferentially around the receiving portion 136. The external pin 150, the first winding pin, and the second winding pin are also arranged around the system integration module 121. This structure is also conducive to the miniaturization of the stator assembly 100.

[0051] like Figure 2 In the embodiment shown, the plastic coating part 130 is injection molded with the coil assembly 110 and the external pin 150 as inserts. Some of the external pins 150 are located in the interface cavity 1351 of the interface part 135. The plastic coating part 130 is injection molded to form the aforementioned receiving part 136, the first terminal encapsulation part 132, the second terminal encapsulation part 133, the box part 131, and the interface part 135.

[0052] like Figure 8In the embodiment shown, the system integration module 121 is located on the back side of the substrate 122. The substrate 122 includes a first conductive portion 1221, a second conductive portion 1222, and a third conductive portion 1223. The system integration module 121 is electrically connected to the first conductive portion 1221, and the coil assembly 110 is electrically connected to the second conductive portion 1222 and the third conductive portion 1223. The second conductive portion 1222 is located between the first side 1224 of the substrate 122 and the first conductive portion 1221, and the third conductive portion 1223 is located between the second side 1225 of the substrate 122 and the second conductive portion 1222. The first conductive portion 1221 may be a conductive metal layer on the back side of the substrate 122, and the second conductive portion 1222 and the third conductive portion 1223 may be metal vias of the substrate 122.

[0053] like Figure 3 In the embodiment shown, the coil bobbin 111 includes an end plate 1114, which is generally annular in shape. The end plate 1114 is located on the outer periphery of the winding tube 1111, and the terminal receiving portion is located on the radial side of the end plate 1114. The end plate 1114 can axially limit the helical segment 1132 of the winding 113.

[0054] like Figure 7 In the embodiment shown, the coil assembly 110 includes a claw pole housing 114, which is made of a metal plate. The coil frame 111 is matched with the claw pole housing 114. The winding tube 1111 and the end plate 1114 are basically located inside the claw pole housing 114. The terminal receiving portion extends outward through the notch 1141 of the claw pole housing 114.

[0055] In some embodiments, the coil assembly 110 includes a grounding pin 115 electrically connected to the claw electrode housing 114 and the substrate 122.

[0056] The stator assembly 100 provided in this embodiment can be equipped with an electric actuator. This electric actuator includes not only the stator assembly 100 but also a valve assembly. The valve assembly includes a magnetic rotor, a valve core, and a valve port. The stator assembly 100 is located on the outer periphery of the magnetic rotor, and a throttling orifice is formed between the valve core and the valve port. The changing magnetic field generated by the coil assembly 110 can control the rotation of the magnetic rotor. The rotation of the magnetic rotor can control the valve core to rise or fall relative to the valve port. By raising or lowering the valve core relative to the valve port, the flow area of ​​the throttling orifice can be adjusted, thereby achieving throttling and expansion of the fluid in the electric actuator.

[0057] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications without departing from the concept of this application, and these modifications all fall within the protection scope of this application.

Claims

1. A stator assembly, characterized in that, The stator assembly includes a coil assembly (110) and a circuit board assembly (120). The coil assembly (110) includes a winding (113), a first winding pin, a second winding pin, and a coil bobbin (111). The circuit board assembly (120) includes a substrate (122) and a system integration module (121). The winding (113) and the system integration module (121) are electrically connected via the first winding pin, the second winding pin, and the substrate (122). The coil bobbin (111) includes a winding tube (1111), and the winding (113) is wound around the winding tube (1111). The component (100) includes a receiving portion (136), at least a portion of which is recessed from the first outer sidewall (1321) of the stator assembly (100) toward the winding tube (1111). At least a portion of the receiving portion (136) is located between the first winding pin and the second winding pin. The outer diameter of the winding tube (1111) is defined as d1, the width of the receiving portion (136) is A, and the width of the system integration module (121) is w2, where d1 > A > w2. At least a portion of the system integration module (121) is located in the receiving groove (1361) of the receiving portion (136).

2. The stator assembly according to claim 1, characterized in that, The system integration module (121) includes a chip (1212), peripheral devices (1211) and a packaging layer (1213). The chip (1212) includes a signal processing module (1212a), a communication module (1212b) and a motor drive module (1212c). The packaging layer (1213) encapsulates the chip (1212) and the peripheral devices (1211).

3. The stator assembly according to claim 1, characterized in that, The coil frame (111) includes a first terminal receiving portion (1112) and a second terminal receiving portion (1113). The first terminal receiving portion (1112) protrudes from the outer end wall of the coil frame (111), and the second terminal receiving portion (1113) protrudes from the outer end wall of the coil frame (111). A portion of the first winding pin is located in the first terminal receiving portion (1112), and a portion of the second winding pin is located in the second terminal receiving portion (1113). The coil frame (111) is injection molded with the first winding pin and the second winding pin as inserts or the... The first winding pin and the second winding pin are limited and engaged in the first terminal receiving portion (1112) and the second terminal receiving portion (1113). The minimum distance between the inner wall of the first terminal receiving portion (1112) and the inner wall of the second terminal receiving portion (1113) is defined as w1, d1>w1>A. The first outer wall (1321) is located between the first terminal receiving portion (1112) and the second terminal receiving portion (1113). At least a portion of the receiving portion (136) is located between the first terminal receiving portion (1112) and the second terminal receiving portion (1113).

4. The stator assembly according to claim 2, characterized in that, The coil frame (111) includes a first terminal receiving portion (1112) and a second terminal receiving portion (1113). The first terminal receiving portion (1112) protrudes from the outer end wall of the coil frame (111), and the second terminal receiving portion (1113) protrudes from the outer end wall of the coil frame (111). A portion of the first winding pin is located in the first terminal receiving portion (1112), and a portion of the second winding pin is located in the second terminal receiving portion (1113). The coil frame (111) is injection molded with the first winding pin and the second winding pin as inserts or the... The first winding pin and the second winding pin are limited and engaged in the first terminal receiving portion (1112) and the second terminal receiving portion (1113). The minimum distance between the inner wall of the first terminal receiving portion (1112) and the inner wall of the second terminal receiving portion (1113) is defined as w1, d1>w1>A. The first outer wall (1321) is located between the first terminal receiving portion (1112) and the second terminal receiving portion (1113). At least a portion of the receiving portion (136) is located between the first terminal receiving portion (1112) and the second terminal receiving portion (1113).

5. The stator assembly according to claim 3 or 4, characterized in that, The coil assembly (110) comprises at least two components, including a first coil assembly (P1) and a second coil assembly (P2). The first coil assembly (P1) and the second coil assembly (P2) are arranged back-to-back, defining a first surface (S). The central axis (L) of the stator assembly (100) passes through the first surface (S). The plane containing the first surface (S) is parallel to the thickness direction of the substrate (122). The minimum distance w3 between the first surface (S) and the inner wall of the first terminal receiving portion (1112) is defined. The minimum distance between the first terminal receiving portion (1112) and the inner wall of the second terminal receiving portion (1113) is w4, the width of the first terminal receiving portion (1112) is t1, w4 > w3 + t1, at least a portion of the first terminal receiving portion (1112) of the first coil assembly (P1) is located between the receiving portion (136) and the second terminal receiving portion (1113) of the second coil assembly (P2), and at least a portion of the first terminal receiving portion (1112) of the second coil assembly (P2) is located between the receiving portion (136) and the second terminal receiving portion (1113) of the first coil assembly (P1).

6. The stator assembly according to claim 5, characterized in that, The width of the second terminal receiving portion (1113) is defined as t2, d1 / 2 > w3 + t1, d1 / 2 > w4 + t2.

7. The stator assembly according to claim 5, characterized in that, A first direction is defined, which is perpendicular to the thickness direction of the substrate (122) and perpendicular to the axial direction of the winding tube (1111). The projection of the first winding pin of the first coil assembly (P1) along the first direction does not overlap with the projection of the second winding pin of the second coil assembly (P2) along the first direction. The projection of the first winding pin of the second coil assembly (P2) along the first direction does not overlap with the projection of the second winding pin of the first coil assembly (P1) along the first direction.

8. The stator assembly according to claim 6, characterized in that, A first direction is defined, which is perpendicular to the thickness direction of the substrate (122) and perpendicular to the axial direction of the winding tube (1111). The projection of the first winding pin of the first coil assembly (P1) along the first direction does not overlap with the projection of the second winding pin of the second coil assembly (P2) along the first direction. The projection of the first winding pin of the second coil assembly (P2) along the first direction does not overlap with the projection of the second winding pin of the first coil assembly (P1) along the first direction.

9. The stator assembly according to claim 5, characterized in that, The stator assembly (100) includes a housing portion (131), at least a portion of which protrudes from the first outer peripheral wall (134) of the stator assembly (100). The substrate (122) is welded and fixed to the first winding pin and the second winding pin and is located in the housing cavity (1311) of the housing portion (131). The housing cavity (1311) communicates with the receiving groove (1361) through the first opening (1362) of the receiving portion (136), and the first opening (1362) is located on the first outer peripheral wall (134).

10. The stator assembly according to any one of claims 1 to 4, 6 to 8, characterized in that, The stator assembly (100) includes a housing portion (131), at least a portion of which protrudes from the first outer peripheral wall (134) of the stator assembly (100). The substrate (122) is welded and fixed to the first winding pin and the second winding pin and is located in the housing cavity (1311) of the housing portion (131). The housing cavity (1311) communicates with the receiving groove (1361) through the first opening (1362) of the receiving portion (136), and the first opening (1362) is located on the first outer peripheral wall (134).

11. The stator assembly according to claim 10, characterized in that, The stator assembly (100) includes a first terminal encapsulation portion (132) and a second terminal encapsulation portion (133). The winding (113) is welded and fixed to the first winding pin and located inside the first terminal encapsulation portion (132). The winding (113) is welded and fixed to the second winding pin and located inside the second terminal encapsulation portion (133). The first terminal encapsulation portion (132) protrudes from the first outer peripheral wall (134), and the second terminal encapsulation portion (133) protrudes from the first outer peripheral wall (134). The first terminal encapsulation portion (132) and the second terminal encapsulation portion (133) are located in the housing cavity (1311).

12. The stator assembly according to claim 5, characterized in that, The winding (113) includes a first lead segment (1131), a spiral segment (1132), and a second lead segment (1133). The spiral segment (1132) is located between the first lead segment (1131) and the second lead segment (1133). The spiral segment (1132) is wound around the winding tube (1111). The first lead segment (1131) is wound and welded to the first winding pin. The second lead segment (1133) is wound and welded to the second winding pin. The winding (113) is in a taut state.

13. The stator assembly according to claim 10, characterized in that, The winding (113) includes a first lead segment (1131), a spiral segment (1132), and a second lead segment (1133). The spiral segment (1132) is located between the first lead segment (1131) and the second lead segment (1133). The spiral segment (1132) is wound around the winding tube (1111). The first lead segment (1131) is wound and welded to the first winding pin. The second lead segment (1133) is wound and welded to the second winding pin. The winding (113) is in a taut state.

14. The stator assembly according to any one of claims 1 to 4, 6 to 9, and 11, characterized in that, The winding (113) includes a first lead segment (1131), a spiral segment (1132), and a second lead segment (1133). The spiral segment (1132) is located between the first lead segment (1131) and the second lead segment (1133). The spiral segment (1132) is wound around the winding tube (1111). The first lead segment (1131) is wound and welded to the first winding pin. The second lead segment (1133) is wound and welded to the second winding pin. The winding (113) is in a taut state.

15. The stator assembly according to claim 5, characterized in that, The stator assembly (100) includes an external pin (150) which is electrically connected to the substrate (122). The external pin (150), the first winding pin, and the second winding pin are arranged around the receiving portion (136).

16. The stator assembly according to claim 10, characterized in that, The stator assembly (100) includes an external pin (150) which is electrically connected to the substrate (122). The external pin (150), the first winding pin, and the second winding pin are arranged around the receiving portion (136).

17. The stator assembly according to claim 14, characterized in that, The stator assembly (100) includes an external pin (150) which is electrically connected to the substrate (122). The external pin (150), the first winding pin, and the second winding pin are arranged around the receiving portion (136).

18. The stator assembly according to any one of claims 1 to 4, 6 to 9, and 11 to 13, characterized in that, The stator assembly (100) includes an external pin (150) which is electrically connected to the substrate (122). The external pin (150), the first winding pin, and the second winding pin are arranged around the receiving portion (136).

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