Stator assembly

Abstract

A stator assembly comprises a first winding, a second winding and a third winding which are arranged in the axial direction. The stator assembly comprises a shell and six polar plates; each of the six polar plates comprises a substrate and pole teeth, and the number of the pole teeth of the six polar plates is the same; a positioning hole, a positioning convex part, at least two limiting parts and more than two through holes are arranged on the base plate of each polar plate of the six polar plates; pole teeth of the pole plates are positioned on the inner sides of the corresponding windings; the shell is matched with the six polar plates, and the wall part of the shell is positioned on the outer sides of the six polar plates. Thus, compared with a stator assembly with two windings, the stator assembly is provided with three windings, the application mode is more flexible, and the requirement of a relatively high-speed electric device can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and in particular to an electric device. Background Art

[0002] The stator assembly for an ordinary two-phase stepper motor includes two stamped plates, two stamped housings, two winding bobbins, etc. Due to the relatively deep depth of the stamped housing, the processing difficulty increases. The winding is wound on the insulating bobbin, and after the winding is processed, it is further assembled with the plate. The insulating bobbin needs to withstand the pressure of the winding, and it also needs a certain strength to maintain stability and resistance to deformation, so the bobbin needs to be relatively thick. To meet the power requirements, the two-phase stepper motor has a relatively large number of turns and a relatively large inductance. When running at high speed, the back electromotive force and inductive reactance are relatively large, and the coil current is relatively smaller than when running at normal speed. The motor torque is proportional to the current, so the motor torque is smaller when running at high speed, and even in special circumstances, it may not be able to start or operate. Summary of the Invention

[0003] The purpose of the present invention is to provide a stator assembly including three windings that can meet the relatively higher performance requirements of electric devices. To achieve the above purpose, the present invention adopts the following technical solutions:

[0004] A stator assembly, comprising: a first winding, a second winding, and a third winding, the three windings being arranged axially, the second winding being located between the first winding and the third winding; the stator assembly comprising a housing and six pole plates: a first pole plate, a second pole plate, a third pole plate, a fourth pole plate, a fifth pole plate, and a sixth pole plate; the six pole plates each comprising a base plate and pole teeth, the six pole plates having the same number of pole teeth, the pole teeth extending axially; the base plate of each of the six pole plates being provided with at least two limiting portions and two or more through holes; the second pole plate, the third pole plate, the fourth pole plate, and the fifth pole plate being provided with positioning holes and positioning protrusions; the pole teeth of the first and second pole plates being located inside the first winding, the pole teeth of the third and fourth pole plates being located inside the second winding, and the pole teeth of the fifth and sixth pole plates being located inside the third winding; the housing being adapted to fit the six pole plates, with the wall of the housing being located outside the six pole plates.

[0005] Such a stator assembly includes six pole plates, with the pole teeth of the pole plates located on the inner sides of the corresponding windings, and the wall of the shell located on the outer sides of the pole plates. The shell does not need to be provided with pole teeth, and the processing is relatively convenient. In addition, the stator assembly includes three windings. Under the condition of the same size, the height requirement of the pole teeth of the pole plates can be relatively reduced compared with the stator assembly with two windings. When the height of the pole teeth is the same, the coordination with the windings is better, thereby improving the overall performance of the stator assembly, and thus meeting the relatively higher performance requirements of the electric device under the condition of the same size. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a perspective schematic diagram of an electric device according to an embodiment of the present invention;

[0007] Figure 2 yes Figure 1 A schematic top view of the electric device shown;

[0008] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the valve body assembly connector of the electric device shown;

[0009] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the stator assembly of the electric device shown;

[0010] Figure 5 is a schematic cross-sectional view of an electric device according to an embodiment of the present invention;

[0011] Figure 6 yes Figure 5 The process state of the stator assembly of the electric device shown, that is, the schematic diagram of the winding components;

[0012] Figure 7 yes Figure 6 A schematic cross-sectional view of a winding component of a stator assembly is shown;

[0013] Figure 8 yes Figure 5 、 Figure 6 The schematic diagram of the structure of the plate frame component of the winding component shown in FIG. Figure 9 The plate assembly shown is formed by injection molding as an insert and then assembling the adapter pin; or Figure 9 The plate assembly and transfer pin shown are injection molded as inserts;

[0014] Figure 9 yes Figure 5 、 Figure 6 The schematic diagram of the structure of the plate assembly of the winding component shown can be used as Figure 8 Inserts for the plate frame components shown;

[0015] Figure 10 yes Figure 9 The cross-sectional view of the plate assembly shown is a schematic diagram. The plate assembly may be relatively fixed by means of a tooling die or the like, or may be relatively fixed after being limited.

[0016] Figure 11 1 is a schematic front view and a schematic cross-sectional view of an embodiment of the electrode plate of this embodiment;

[0017] Figure 12 1 is a perspective schematic diagram of the housing of this embodiment, Figure 13 is a schematic cross-sectional view of another housing;

[0018] Figure 14 Schematic diagram of the structure of the plate skeleton component of the second embodiment, Figure 15 is a structural diagram of a winding component of a second embodiment;

[0019] Figure 16 1 is a schematic structural diagram of a skeleton of a plate skeleton component of the third embodiment. Figure 17 This is a schematic diagram of the assembly of two plates before the skeleton is injection molded. The two plates may be limited by tooling molds;

[0020] Figure 18 is a partial perspective schematic diagram of another embodiment of the electric device;

[0021] Figure 19 It is a cross-sectional schematic diagram of an embodiment of the electric device.

[0022] In the figure: 10 stator assembly, 11 winding component, 110 pole plate frame component, 110a frame, 1100 pole plate assembly, 1101 limiting portion, 1102 missing portion, 1103 positioning hole, 1104 positioning protrusion, 1105 through hole, 111 first pole plate, 1111, 1121, 1131, 1141, 1151, 1161 substrate, 1112, 1122, 1132, 1142, 1152, 1162 pole teeth, 1115 limiting pin, 112 second pole plate, 113 third pole plate, 114 fourth pole plate, 115 fifth pole plate, 116 sixth pole plate, 12 insulating frame, 121, 121a first frame portion, 122 second frame portion, 123 third frame portion, 124 pin connecting portion, 1240 pin mating portion , 1241 first pin connecting portion, 1242 second pin connecting portion, 1243 third pin connecting portion, 125 side wall, 126 bottom wall, 13 plastic sealing portion, 130 main body, 131 protrusion, 132 protrusion connecting portion, 133 extension portion, 14 shell, 141 wall portion, 142 notch, 143 cover portion, 151 first winding, 152 second winding, 153 third winding, 16 pins, 160 connecting portion, 1600 accommodating portion, 1601 clamping portion, 161 first pin, 162 second pin, 163 third pin, 164 fourth pin, 165 adapter pin, 166 positioning column, 20 valve body component, 21 sleeve, 22 circuit board, 23 transmission shaft, 24 magnetic rotor, 251 bearing, 252 washer; 30 connecting assembly, 31 connecting piece DETAILED DESCRIPTION

[0023] In related technologies, the stator assembly includes windings, an insulating frame, pole plates, etc. The windings are wound on the insulating frame, and then assembled with the pole plates and the outer shell. The insulating frame requires a certain strength and must withstand the pressure of the windings. Generally, the thickness of the insulating frame is greater than the thickness of the pole plates.

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figures 1-13 . Figure 1 This is a three-dimensional schematic diagram of an electric device according to an embodiment of the technical solution of the present invention. Figure 2 is a top view schematic diagram of the electric device, Figure 3 This is a three-dimensional structural diagram of the valve body component of the electric device. Figure 4 1 is a schematic diagram of the three-dimensional structure of the stator assembly of the electric device; Figure 5 is a cross-sectional schematic diagram of an embodiment of an electric device, Figure 6 yes Figure 5 The process state of the stator assembly of the electric device shown, that is, the schematic diagram of the winding components; Figure 7 yes Figure 6 A schematic cross-sectional view of a winding component of a stator assembly is shown; Figure 8 yes Figure 5 、 Figure 6 The schematic diagram of the structure of the plate frame component of the winding component is shown, which can be used to wind three windings on the plate frame component, and the three windings are connected to the adapter pins respectively, such as soldering or puncture connection; the plate frame component can be made of Figure 9 The plate assembly shown is formed by injection molding as an insert and then assembling the adapter pins. The plate assembly is limited by tooling and molds. The plate frame component can also be made of Figure 9 The plate assembly and transfer pin shown are injection molded as inserts; Figure 10 yes Figure 9 The cross-sectional view of the plate assembly shown in the figure shows that the plate assembly can be limited in position or relatively fixed after being limited in position during assembly by means of a tooling die or the like; Figure 11 is a schematic diagram of an implementation of the electrode plate of this embodiment; Figure 12 1 is a perspective schematic diagram of the housing of this embodiment, Figure 13 It is a cross-sectional schematic diagram of another shell.

[0025] The electric device includes a stator assembly 10 and a valve body 20. The stator assembly 10 and the valve body 20 are fixed or limited by a connection assembly 30. The valve body 20 includes a valve body 22, a sleeve 21, a magnetic rotor 24 located within the sleeve, and a valve core located within the valve body 20. The magnetic rotor 24 corresponds to the position of the three windings. The axial height of the magnetic rotor 24 is greater than the height distance of the three windings. In other words, the positions corresponding to the three windings fall within the magnetic rotor's sensing range. The axial positions of the first, second, and third windings are all within this corresponding height range of the magnetic rotor. In this embodiment, the magnetic rotor 24 is located inside the three windings of the stator assembly. The axial position of the magnetic rotor 24 corresponds to the axial position of the three windings of the stator assembly. That is, all three windings are located outside the magnetic rotor 24. The magnetic rotor 24 can sense and cooperate with any winding. The stator assembly 10 comprises a main body 130, a raised portion 131 axially projecting from the main body 130, an extension 133 laterally projecting from the main body 130, and a connecting portion 160. The connecting portion 160 projects axially from the extension 133. The raised portion 131 and the connecting portion 160 protrude in the same direction. The raised portion 131 and the connecting portion 160 are fixedly connected by a raised connecting portion 132. The raised portion 131, the connecting portion 160, and the raised connecting portion 132 form an integral structure. The stator assembly comprises a plastic encapsulation portion 13, which is partially encapsulated around the outside of the winding assembly. The main body 130, the raised portion 131, the raised connecting portion 132, the extension 133, and the connecting portion 160 are part of, or at least partially comprise part of, the plastic encapsulation portion 13. The stator assembly 10 of the electric device has a connecting portion 160 with a receiving portion 1600 therein. The connecting portion 160 is provided with a first pin 161, a second pin 162, a third pin 163, and a fourth pin 164 for mating with an external device. The first pin 161, the second pin 162, the third pin 163, and the fourth pin 164 are located in the receiving portion, or at least substantially located in the receiving portion 1600. A snap-fitting portion 1601 is provided on the outer wall of the connecting portion 160 for mating engagement. The stator assembly 10 has a stator hole, which is partially located within the raised portion 131 and extends into the main body. The stator hole can be a blind hole, or in some electric devices, a through hole. The stator hole mates with the sleeve 21, such as with a clearance fit. The stator assembly 20 is sleeved onto the sleeve 21 of the valve body 20 via the stator hole.

[0026] The stator assembly 10 of this embodiment includes a winding component 11 and a plastic encapsulation portion 13. The stator assembly 10 is formed by injection molding the winding component 11, with at least the winding component 11 being an insert. The plastic encapsulation portion 13 covers substantially the entire exterior of the winding component 11, except for the pins 16. The connection portion of the pins 16 is exposed through the plastic encapsulation portion 13, while the pins 16 are partially encapsulated by the plastic encapsulation portion 13 for further securement. The winding component 11 includes three windings: a first winding 151, a second winding 152, and a third winding 153. The winding component 11 includes six pole plates: a first pole plate 111, a second pole plate 112, a third pole plate 113, a fourth pole plate 114, a fifth pole plate 115, and a sixth pole plate 116. The winding component 11 includes an insulating skeleton 12, which has three skeleton parts for winding the winding. The first skeleton part 121 includes a first pole plate 111 and a second pole plate 112 arranged opposite to each other in the direction of the pole teeth, and a side wall 125 and a bottom wall 126 fixed to the inner surfaces of the first pole plate 111 and the second pole plate 112. The first skeleton part 121 has a first winding area. The second skeleton part 122 includes a third pole plate 113 and a fourth pole plate 114 arranged opposite to each other in the direction of the pole teeth, and a side wall 125 and a bottom wall 126 fixed to the inner surfaces of the third pole plate 113 and the fourth pole plate 114. The second skeleton part 122 has a second winding area. The third skeleton part 123 includes a fifth pole plate 115 and a sixth pole plate 116 arranged opposite to each other in the direction of the pole teeth, and a side wall 125 and a bottom wall 126 fixed to the inner surfaces of the fifth pole plate 115 and the sixth pole plate 116. The third skeleton part 123 has a third winding area.

[0027] The first electrode plate 111 includes a substrate 1111 and pole teeth 1112, the second electrode plate 112 includes a substrate 1121 and pole teeth 1122, the pole teeth 1112 of the first electrode plate 111 face the substrate 1121 of the second electrode plate 112, and the pole teeth 1122 of the second electrode plate 112 face the substrate 1111 of the first electrode plate 111; the third electrode plate 113 includes a substrate 1131 and pole teeth 1132, the fourth electrode plate 114 includes a substrate 1141 and pole teeth 1142, the pole teeth of the third electrode plate 113 The pole teeth 1132 face toward the substrate 1141 of the fourth pole plate 114, and the pole teeth 1142 of the fourth pole plate 114 face toward the substrate 1131 of the third pole plate 113. The fifth pole plate 115 includes a substrate 1151 and pole teeth 1152, and the sixth pole plate 116 includes a substrate 1161 and pole teeth 1162. The pole teeth 1152 of the fifth pole plate 115 face toward the substrate 1161 of the sixth pole plate 116, and the pole teeth 1162 of the sixth pole plate 116 face toward the substrate 1151 of the fifth pole plate 115. The substrate 1121 of the second pole plate 112 and the substrate 1131 of the third pole plate 113 are arranged back to back, with the pole teeth 1122 of the second pole plate 112 facing away from the substrate 1111 of the first pole plate 111, and the pole teeth 1132 of the third pole plate 113 facing away from the substrate 1121 of the second pole plate 112. The substrate 1141 of the fourth electrode plate 114 and the substrate 1151 of the fifth electrode plate 115 are arranged back to back. The pole teeth 1142 of the fourth electrode plate 114 face away from the substrate 1151 of the fifth electrode plate 115, and the pole teeth 1152 of the fifth electrode plate 115 face away from the substrate 1141 of the fourth electrode plate 114. The pole teeth of the first electrode plate 111 are at least partially located between two adjacent pole teeth of the second electrode plate 112, and the pole teeth of the second electrode plate 112 are at least partially located between two adjacent pole teeth of the first electrode plate 111. The pole teeth of the third electrode plate 113 are at least partially located between two adjacent pole teeth of the fourth electrode plate 114, and the pole teeth of the fourth electrode plate 114 are at least partially located between two adjacent pole teeth of the third electrode plate 113. The pole teeth of the fifth electrode plate 115 are at least partially located between two adjacent pole teeth of the sixth electrode plate 116, and the pole teeth of the sixth electrode plate 116 are at least partially located between two adjacent pole teeth of the fifth electrode plate 115.

[0028] The winding assembly 11 includes three groups of pin connectors 124, each projecting radially outward from one side of the electrode plate. Specifically, a first pin connector 1241 projects radially and axially from the base 1111 of the first electrode plate; a second pin connector 1242 projects radially from the bases of the second and third electrode plates; and a third pin connector 1243 projects radially from the bases of the fourth and fifth electrode plates. The first, second, and third pin connectors 1241, 1242, and 1243 project radially in the same direction. The six electrode plates have approximately the same thickness; specifically, the bases of the six plates have substantially the same thickness. The thickness δ of the insulating side wall 125 of the three skeleton parts connected to the pole plate is relatively small, and the thickness δ can be smaller than the thickness of the base of the pole plate, such as 0.3mm-0.5mm. The thickness of the insulating bottom wall 126 of the three skeleton parts connected to the pole plate can also be correspondingly smaller, and the bottom wall thickness of the pole teeth corresponding portion can be 0.3mm-0.5mm. Compared with the method of setting the skeleton alone, this can reduce the space waste caused by the thickness of the skeleton and improve space utilization. The thickness δ1 of the second pin connection part 1242 is smaller than the distance δ2 between the two side walls connected to the second pin connection part 1242, that is, δ1 is less than twice the thickness of the pole plate and the sum of the thickness of the two side walls. The axial sides of the end of the second pin connection part 1242 are both slightly biased towards the direction of the pole plate connected thereto, such as Figure 7 The upper side of the end of the second pin connection portion 1242 is positioned slightly downward, while the lower side of the end of the second pin connection portion 1242 is positioned slightly upward. In other words, the upper side of the end of the second pin connection portion 1242 is slightly lower than the side portion 125 provided on the inner side of the second electrode plate, while the lower side of the end of the second pin connection portion 1242 is slightly higher than the side portion 125 provided on the inner side of the third electrode plate to which it is connected. This facilitates the winding process and reduces the impact on the winding enameled wire. The same applies to the third pin connection portion 1243: the upper side of the end of the third pin connection portion 1243 is positioned slightly downward, while the lower side of the end of the third pin connection portion 1243 is positioned slightly upward. The thickness δ1 of the axial sides of the ends of these two sets of pin connection portions is less than the distance δ2 between the two sidewall portions connected to the pin connection portions. This facilitates the winding process and reduces or even eliminates the impact on the winding enameled wire during winding. The lower side of the end portion of the first pin connecting portion 1241 is slightly higher than the position of the side portion 125 provided on the inner side of the first electrode plate connected thereto.

[0029] The three groups of pin connectors 124 correspond in axial alignment with each other within the winding assembly. Specifically, they lie in the same radial direction but at different axial positions within the winding assembly. Space for winding is provided between adjacent groups of pin connectors 124. The first pin connector 1241 is closer to the mounting portion 160 than the second and third pin connectors 1242 and 1243. The six plates are located within the main body. Axially, the first, second, third, fourth, fifth, and sixth plates 111, 112, 113, 114, 115, and 116 are arranged in this order, facing away from the protrusion 131 or toward the valve body. The pin connectors face away from the valve body. The three groups of pin connectors 124 mate with their corresponding framework components and are relatively offset toward the mounting portion.

[0030] The winding assembly's three groups of pin connections 124 are each equipped with adapter pins 165 and positioning posts 166. Adapter pins 165 provide both electrical and mechanical connections to the winding. They can connect to externally connected pins or directly to the outside world. Externally connected pins are electrically connected to one end of the corresponding winding via adapter pins 165. Positioning posts 166 are used to position or secure the externally connected pins. Positioning posts 166 can be part of the plastic encapsulation, integrally formed during injection molding. Adapter pins 165 can be integrated with the plates and other components during the injection molding process as inserts, or they can be inserted and secured into the mounting holes of the corresponding pin mating portions 1240 of the pin connection 124 after injection molding. The first pin connection portion 1241 is provided with three adapter pins 165 and two positioning posts 166. Two of the three adapter pins 165, A and X, can be connected to the two ends of the first winding respectively. One of them, such as the X end, can be used as a common end and connected to the common ends of the other two windings, namely the adapter pins Y and Z. In this embodiment, the common ends of the three windings are connected but not electrically connected to the outside through external pins. In addition, the three common ends can also be connected by external pins; the other one is grounded through the ground pin. The second pin connection portion 1242 is provided with two adapter pins 165 and three positioning posts 166. The B and Y ends of the two adapter pins 165 are respectively connected to the two ends of the second winding, with the Y end serving as a common end connected to the other two windings. The third pin connection portion 1243 is provided with two adapter pins 165 and three positioning posts 166. The Z and C ends of the two adapter pins 165 are respectively connected to the two ends of the third winding, with the Z end serving as a common end connected to the common end of the other two windings, namely, adapter pins X and Y. The positioning posts 166 can be used to mate and secure the external pins. The stator assembly can have four external pins for external electrical connection, one pin connected to each winding, another pin for grounding, and one pin connecting the other ends of the three windings and external connection. The stator assembly can also have five external pins for external electrical connection, one pin connected to each winding, one pin for grounding, and one pin connecting the other ends of the three windings and external connection.

[0031] When the electric device is working, the first pin 161 can be connected to the ground terminal, and the two connection terminals of the external power supply can be connected to the stator assembly in at least three ways. One is that the two connection terminals of the external power supply are connected to the second pin 162 and the third pin 163. At this time, the second winding 152 and the third winding 153 are connected and work at the same time. The second connection method is that the two connection terminals of the external power supply are connected to the fourth pin 164 and the third pin 163. At this time, the first winding 151 and the third winding 153 are connected and work at the same time. The third connection method is that the two connection terminals of the external power supply are connected to the fourth pin 164 and the second pin 162. At this time, the first winding 151 and the second winding 152 are connected and work at the same time. In addition, the three windings can be connected at the same time. In this way, the electric device can have two windings working at the same time. Under the same working current, the operating ability of the electric device can be improved. Compared with the working condition where only one winding is energized, the number of turns of each winding of the stator assembly can be less, and the magnetic energy of the pole teeth and the tooth roots is relatively less likely to saturate. In the case where the electric device needs to run at high speed, the operating performance is relatively better and the operation is smoother. At the same time, the torque harmonics of the electric device are less. Relatively speaking, this control method is relatively simple and easier to implement.

[0032] Ginseng Figures 9-11Each pole plate includes a substrate and pole teeth. The pole teeth extend axially in the middle of the substrate. The number of pole teeth on each pole plate is the same, and the number of pole teeth can be 12, 18, 24, etc. The pole teeth are evenly arranged circumferentially, and the angle between two adjacent pole teeth is the same. For example, when the number of pole teeth is 12, the angle between two adjacent pole teeth of the same pole plate is 30 degrees. When the number of pole teeth is 18, the angle between two adjacent pole teeth of the same pole plate is 20 degrees. A pole tooth of the second pole plate is arranged between two adjacent pole teeth of the first pole plate, and a pole tooth of the first pole plate is arranged between two adjacent pole teeth of the second pole plate. The pole teeth of the first and second pole plates are evenly arranged in a cross pattern, and the circumferential angle between two adjacent pole teeth is the same. The outer end portions 1106 of the substrates of the six pole plates are the same size. The same here means within the allowable tolerance range, not absolutely the same. The substrate of each electrode plate is provided with a notch 1102, a positioning hole 1103, a positioning protrusion 1104, two or more through-holes 1105, and two limiting portions 1101. The limiting portion 1101 can be a notch, and the two notches have the same size for limiting. The notch shape can be square, circular, or angular, etc. The positioning hole 1103 and the positioning protrusion 1104 can be selectively arranged in a coordinated manner to better position the two matching electrode plates. Alternatively, two positioning holes 1103 and two positioning protrusions 1104 can be provided, with the positioning hole 1103 being larger than the positioning protrusion 1104. The protruding direction of the positioning protrusion 1104 is opposite to the protruding direction of the pole teeth. The number of through-holes 1105 can be 4, 6, or 8, etc. The missing portions 1102 of the six pole plates are roughly located at the same circumferential position, and the positions of some pole plates are the same or slightly deviated from the positions of the remaining pole plates. In other words, the missing portions 1102 of the six pole plates are located at the same side of the circumferential position of the stator assembly; the missing portions 1102 of the six pole plates have the same degree of missingness, and the missing portions can make the pin connection portion relatively close to the radial inside, making the structure of the stator assembly relatively compact. Among them, two pole plates with adjacent bases are arranged back to back or facing each other closely, such as the second pole plate and the third pole plate, the fourth pole plate and the fifth pole plate. The base of one pole plate has at least two through holes 1105 that are opposite to and connected to the through holes 1105 of the base of the other pole plate, so that plastic material can flow in and be positioned during injection molding. The limiting portion 1101 of one pole plate is relatively matched with the limiting portion 1101 of the other pole plate, so that the pole plate assembly 1100 can be correctly positioned during the injection molding of the skeleton portion. The positioning protrusion 1104 of the base of one pole plate is at least mostly located in the positioning hole 1103 of the base of the other pole plate, and the positioning protrusion 1104 of the base of the other pole plate is at least mostly located in the positioning hole 1103 of the base of this pole plate. The defective portion of the second electrode plate is aligned with the defective portion of the third electrode plate, the defective portion of the fourth electrode plate is aligned with the defective portion of the fifth electrode plate, the defective portion of the first electrode plate is deflected relative to the defective portion of the second electrode plate, and the defective portion of the sixth electrode plate is deflected relative to the defective portion of the fifth electrode plate.

[0033] The central axis position of the plate substrate is defined as the O axis. Since the plate is not a completely symmetrical structure, the plate substrate is not a completely symmetrical structure either. The central axis here is only relative to the outer end contour of the plate and is defined for clarity of explanation. The same applies to the midpoint in this article. Taking a substrate plane as an example, the center N of the defective portion 1102 corresponding to the substrate is defined as the center position O of the substrate. The line passing through the center position O of the substrate and the center N of the defective portion 1102 is defined as the center line ON. With the center line ON of the substrate as a reference, the two limiting portions 1101 are of the same size and are symmetrically distributed left and right. The two positioning holes 1103 are symmetrically distributed with the two positioning protrusions 1104, respectively. That is, the centerline symmetrical portion of one positioning hole is the positioning protrusion, and the centerline symmetrical portion of one positioning protrusion is the positioning hole. The positioning hole 1103 is slightly larger than the positioning protrusion 1104. Four or more through holes 1105 are arranged symmetrically about the center line ON. The number of through holes 1105 can be 2, 4, 6, or 8, and they are symmetrically distributed left and right about the center line ON. The pole teeth are asymmetrically distributed about the center line ON. The two limiters 1101 are symmetrical about the center position O of the substrate, the two positioning holes 1103 are symmetrical about the center position O of the substrate, the two positioning protrusions are symmetrical about the center position O of the substrate, and at least four positioning holes 1103 are symmetrical about the center position O of the substrate. Any pole tooth has another symmetrical pole tooth about the center position O of the substrate.

[0034] The six pole plates of the stator assembly can be different, as long as the settings of the limit portion 1101, the positioning hole 1103, the positioning protrusion 1104, and the through hole 1105 meet the assembly requirements, the positions of the missing parts between the six pole plates can be appropriately changed so that the missing parts can be aligned during assembly. In addition, the six pole plates can also adopt the same structure, so that there is a deflection angle between the two pole plates of each winding, so that the two pole plates are arranged opposite to each other and the missing parts of the two pole plates are located on the same side. Based on the alignment of the center hole and the limit part of the winding, a deflection angle is required between the pole plates. When a 24-pole motor is used and the number of rotor pole pairs is 12, in a specific embodiment, the second pole plate is deflected 10° based on the first pole plate, the fourth pole plate is deflected 10° based on the third pole plate, and the sixth pole plate is deflected 20° in the opposite direction based on the fifth pole plate; and the two pole plates of the two adjacent windings back to back or facing each other are aligned with the missing parts and the limit parts, that is, the second pole plate and the third pole plate are aligned with the missing parts and the limit parts, and the fourth pole plate and the fifth pole plate are aligned with the missing parts and the limit parts. That is, among the six plates arranged in sequence in the three groups of windings, the deflection direction of one of the two plates in one group of windings relative to the other plate is opposite to the deflection direction of one of the two plates in the other group of windings relative to the other plate.

[0035] Looking from the first electrode plate to the sixth electrode plate, the limiting portion of the second electrode plate is deflected at an angle such as 10° relative to the limiting portion of the first electrode plate, the limiting portion of the fourth electrode plate is deflected at an angle such as 10° relative to the limiting portion of the third electrode plate, and the limiting portion of the sixth electrode plate can be deflected at an angle such as 10° relative to the limiting portion of the fifth electrode plate, or can be deflected in the opposite direction at an angle such as 20°; among these three groups of deflection angles, two groups have a deflection direction clockwise and the other group is counterclockwise, or among these three groups of rotation angles, two groups have a rotation direction counterclockwise and the other group is clockwise; the angles of two of the three groups of deflection angles are the same.

[0036] Taking the pole teeth on both sides of the center line ON as an example, the line OM connecting the center M of the pole tooth 117 and the center position O of the substrate is defined as the pole tooth center line, and the angle between the pole tooth center line and the center line ON is α. The line OP connecting the center P of the pole tooth 118 and the center position O of the substrate is defined as the pole tooth center line, and the angle between the pole tooth center line and the center line ON of the substrate is β, β>α, and the two angles are different. With the missing part and the center O of the substrate of the pole plate as the reference, the pole teeth are arranged asymmetrically. The angle between the center lines of two adjacent pole teeth is Where p is the number of rotor pole pairs. For example, for a 24-pole motor, the number of rotor pole pairs is 12. The angle between the center lines of two adjacent pole teeth on the same pole plate is 30°, while the angle between the center lines of two adjacent pole teeth on the same winding is 15°.

[0037] The angle between the centerlines of two adjacent pole teeth on the same pole plate in the stator assembly is the same, and the angle between the centerlines of two adjacent pole teeth after assembly of the same winding is the same. The pole teeth of different windings are offset by an angle, with the pole teeth of two adjacent windings offset by an angle θ. A pole tooth of the first pole plate corresponding to the first winding and the pole tooth of the third pole plate corresponding to the second winding that is circumferentially closest to the first pole plate are offset by an angle θ. A pole tooth of the third pole plate corresponding to the second winding and the pole tooth of the fifth pole plate corresponding to the third winding are offset by an angle θ. These two offset angles θ are the same. Similarly, a pole tooth of the second pole plate of the first winding and a pole tooth of the fourth pole plate of the second winding are offset by an angle θ. A pole tooth of the fourth pole plate of the second winding and a pole tooth of the sixth pole plate of the third winding are offset by an angle θ. These offset angles are the same. For example, in one embodiment, a 24-pole motor is used, the number of rotor pole pairs is 12, and the staggered angle θ of the pole teeth of two adjacent windings is 10°, such as: α is 12.5°, β is 17.5°, or α is 2.5°, β is 27.5°. The angle between the center line of the pole teeth and the center line ON of the substrate can be Where p is the number of rotor pole pairs, and n is an integer. A negative angle indicates that the centerline of the pole teeth is to the left of the centerline. With the stop or gap as a reference, the pole teeth of the first and second pole plates are deflected 10°, the pole teeth of the fourth and third pole plates are deflected 10°, and the pole teeth of the sixth and fifth pole plates are deflected 20° in opposite directions. The second and third pole plates face opposite substrates, and the fourth and fifth pole plates face opposite substrates. The gaps in the two sets of pole plates are aligned with the stop, resulting in a 5° deflection between the pole teeth of the two opposing sets of pole plates.

[0038] To ensure ease of assembly and performance, the pole teeth of the six plates have the same height, the same number of limiting portions, the same number of positioning holes, the same number of positioning protrusions 1104, and the same number of through holes 1105; the number of positioning holes is greater than or equal to the number of the positioning protrusions 1104 of the plate.

[0039] The plates of plate assembly 1100 cannot be fixed together. When using them as inserts for injection molding the plate frame component 110, or when molding the frame portion, they are positioned using a tooling mold. Positioning portion 1101 serves as one of the limiting references. The two opposing plates are positioned using a combination of positioning protrusions and positioning holes, and can also be positioned using the inner hole and the missing portion. The adapter pins can also be positioned in the mold as part of the insert.

[0040] The stator assembly also includes a shell 14. The shell 14 is made of a soft magnetic material like the pole plates. The shell 14 includes a wall portion 141 and a cover shell 143. To match the pin connection portion, the shell 14 is also provided with a notch 142 to facilitate the lead-out and connection of the two end wires of the winding. The shell of this structure does not require the processing of pole teeth, which is relatively convenient to process and the entire stator assembly can be provided with only one shell. The shell can be stamped from a sheet material. The shell 14 is covered on the winding component 11. The wall portion 141 of the shell 14 matches the six pole plates. The wall portion 141 of the shell 14 is located on the outside of the three windings and the outside of the six pole plates. The gap between the inner wall of the wall portion 141 and the outer end portion 1106 of the pole plate is as small as possible or even transitionally matched to improve the matching performance of the two. Then, the plastic sealing portion is formed by injection molding to complete the fixation of the two and the insulation protection of the winding part.

[0041] In the above embodiment, the stator assembly is grounded. Some electric devices such as electric valves do not require grounding. Figure 14 、 Figure 15 , Figure 14 1 is a schematic structural diagram of a pole plate frame component of a stator assembly of an electric device according to a second embodiment of the technical solution of the present invention. Figure 15It is a structural diagram of the winding component of the stator assembly. The main difference is that the number of adapter pins 165 and positioning posts 166 provided in the pin connection part 124 is different. Other structures of the stator assembly of this embodiment are not shown, and can refer to the above embodiment. The winding assembly also has three groups of pin connection parts 124. The pin connection parts 124 are respectively provided with adapter pins 165 and positioning posts 166. The adapter pins 165 can be used for electrical and mechanical connection of the winding. The external connection pins are electrically connected to one end of the corresponding winding through the adapter pins 165. The positioning posts 166 are used for matching, limiting or fixing the external connection pins. The positioning posts 166 can be part of the plastic sealing part and formed integrally during injection molding; the adapter pins 165 can be fixed as inserts together with the pole plates during injection molding, or they can be inserted into the mounting holes of the pin matching parts 1240 corresponding to the pin connection parts 124 after injection molding. Specifically, the first pin connection part 1241 is relatively closer to the mounting part than the second pin connection part 1242 and the third pin connection part 1243. The first pin connection part 1241 is provided with two adapter pins 165 and two positioning columns 166. The A and X of the two adapter pins 165 can be connected to the two ends of the first winding respectively. One of them, such as the X end, can be used as a common end and connected to the common connection ends Y and Z of the other two windings. In this embodiment, the common ends of the three windings are connected and led out through the fourth pin 164, and can be electrically connected to the outside; in addition, the A end is led out through the first pin 161. The second pin connection portion 1242 is provided with two adapter pins 165 and two positioning posts 166. The B and Y ends of the two adapter pins 165 are respectively connected to the two ends of the second winding, wherein the Y end is connected to the other two windings as a common end; the other end B is led out through the second pin 162; the third pin connection portion 1243 is provided with two adapter pins 165 and two positioning posts 166. The positioning posts 166 can be used to match and fix the pins. The two adapter pins 165, namely Z and C, are respectively connected to the two ends of the third winding, wherein the adapter pin at the Z end is connected to the X and Y ends as a common end, and the other end C is led out through the third pin 163 for external electrical connection. In this way, the stator assembly has four pins for external electrical connection. The other structures and assemblies of this embodiment can refer to the above embodiments and will not be repeated here.

[0042] When the electric device is operating, the two terminals of the stator assembly's external power supply are connected to and communicated with the two pins, respectively. The external power supply can be connected to the stator assembly in a variety of ways, such as connecting the two terminals of the external power supply to both the first pin 161, the second pin 162, and the third pin 163. In this case, both windings are connected and operate simultaneously, allowing the electric device to have two windings operating simultaneously. This improves the device's operating capability under the same operating current. Compared to operating with only one winding energized, each winding of the stator assembly can have fewer turns, and the magnetic energy in the pole teeth and tooth roots is less likely to saturate. This improves operating performance and makes operation smoother when the electric device requires high-speed operation, while also reducing torque harmonics. Alternatively, all three windings can operate simultaneously.

[0043] The winding components above are of one-piece structure, and can also be processed separately and then assembled. Figure 16 、 Figure 17 . Figure 16 1 is a schematic structural diagram of a plate frame member of the third embodiment of the technical solution of the present invention. Figure 17This is a schematic diagram of the two plates assembled before injection molding of the skeleton. The two plates can be positioned using tooling, molds, and other tools. The electric device includes a stator assembly and a valve body. The stator assembly includes a winding assembly, which is secured by a plastic seal formed through injection molding. The winding assembly includes three windings, which are separately arranged. The first winding is used as an example below, and the remaining windings can be used as a reference. The winding assembly includes a skeleton 110a, on which the windings are wound. The skeleton 110a is formed into a first skeleton part 121a by injection molding with at least two electrode plates as inserts. The skeleton 110a includes a first electrode plate 111, a second electrode plate 112 and a first skeleton part 121a. The first skeleton part 121a has two side walls 1211 located on the inner side of the skeleton part, a bottom wall 1212, and a limiting pin 1115 located in the through hole 1105 of the electrode plate. The limiting pin 1115 and the side walls 1211 and the bottom wall 1212 are an integral structure. The thickness of the side wall 1211 of the skeleton part is less than or equal to the thickness of the base 1111 of the electrode plate. The first pole plate 111 includes a substrate 1111 and pole teeth 1112. The second pole plate 112 includes a substrate 1121 and pole teeth 1122. The pole teeth 1112 of the first pole plate 111 face toward the substrate 1121 of the second pole plate 112, while the pole teeth 1122 of the second pole plate 112 face toward the substrate 1111 of the first pole plate 111. The first and second pole plates 111 and 112 are positioned relative to their centers and rotated by a certain angle, such as 10°, based on the position limiter and the missing portion. This allows the first pole plate to remain stationary while the second pole plate and the first pole plate are aligned, starting with the position limiter and the missing portion aligned. The second pole plate is rotated by a certain angle, such as 10°, based on the center of the second pole plate. This allows the pole teeth of the two pole plates to mate, with the pole teeth of the second pole plate positioned between two adjacent pole teeth of the first pole plate. Specifically, the relative positioning of these pole plates can be achieved using a tooling mold. The specific deflection angle is related to the number of magnetic poles in the stator. The stator assembly of this embodiment includes three windings, which are assembled and processed into an integral structure by injection molding as at least a part of the insert. Other structures of this embodiment can be obtained by combining and improving the above embodiments, and will not be repeated here.

[0044] The electric device in the above embodiment can be an electric valve, such as an electric expansion valve. By energizing the stator assembly, the magnetic rotor rotates, driving the movement of the valve core, thereby changing the flow area of ​​the valve port of the electric valve. The magnetic rotor can rotate the valve core in various ways, such as by using a threaded mechanism to control the valve core's upward and downward movement. Alternatively, the valve core does not move upward and downward, but the magnetic rotor rotates to change the flow area of ​​the valve core and the valve port. It can also be used in other applications, such as fluid control valves and flow control valves. One method is to energize the stator assembly to rotate the magnetic rotor, driving the valve core's movement, directly changing the fluid flow pattern. For example, an electric valve can have multiple ports, and the port's communication pattern can be changed when the valve core's position changes. Thus, energizing the stator assembly can change the fluid flow pattern of the electric fluid control valve. Another method is to energize the stator assembly to rotate the magnetic rotor, driving the valve core's movement, thereby changing the fluid distribution ratio. For example, an electric valve can have three or more ports, and the distribution ratio of at least two of the ports can be changed by changing the position of the valve core. The electric device can also be an electric pump.

[0045] The following introduces two other embodiments. The difference between this embodiment and the first group of embodiments is that the structure of the valve body component is different, the structure of the stator assembly is also different, and the structure of the plate frame component is different. Figure 18 、 Figure 19 , Figure 18 is a partial three-dimensional schematic diagram of another embodiment of the electric device, Figure 19This is a schematic cross-sectional view of one embodiment of an electric device. The electric device includes a stator assembly 10a, a valve body component, and a circuit board 22. In this embodiment, the valve body component is a separate structure, comprising a drive unit 20a and a valve body. The drive unit 20a and valve body are separate components and can be assembled using a plug-in assembly method. The valve body structure is not shown here. The drive unit 20a includes a magnetic rotor 24, a drive shaft 23, a pair of washers 252, and a set of bearings 251. The magnetic rotor 24 and drive shaft 23 are integrally structured or coupled in a transmission connection. Driven by the magnetic rotor 24, the drive shaft 23 can rotate, thereby driving the valve core. The drive unit 20a is fixed or restrained to the stator assembly 10a, and the circuit board 22 is fixed or restrained to the stator assembly 10a. The stator assembly has a housing 14a, which covers the three windings and six pole plates. The housing 14a includes a wall portion 14a1 and a cover portion 14a2. The wall portion 14a1 and the cover portion 14a2 are fixed together to form a housing, which accommodates the majority of the winding components. The wall portion 14a1 of the housing is located outside the three windings and outside the six plates. Each of the three windings of the stator assembly has at least two adapter pins fixed or retained to the circuit board. The adapter pins can be exposed to facilitate external electrical connection and can also be electrically connected to the circuit board. The winding components of the stator assembly are not injection molded. The windings of the winding components are electrically connected to the adapter pins 165 of the frame portion. The adapter pins 165 are formed as an insert through injection molding into the plate frame component. The three windings are wound on the plate frame component and connected to the adapter pins 165 to form the winding components. The drive unit and winding assembly are assembled, and a housing 14a is provided over the winding assembly. The wall portion 14a1 and the cover portion 14a2 are fixedly mounted. The gap between the inner wall of the wall portion 14a1 and the outer end portion 1106 of the electrode plate is minimized, or even maintained in a transitional fit, to improve the fit between the two. Simultaneously, the circuit board is assembled and fixed to the pin connector or to the adapter pins. In this embodiment, the circuit board is located outside the pin connector of the winding assembly, i.e., on one radial side of the winding assembly.

[0046] Figure 19 The electric device shown is Figure 18The differences between the electric devices shown include: the position of the circuit board 22 is different. The circuit board 22 is located on the side where the first pole plate 11 is located, that is, on the axial side of the winding component, and the winding component is connected to the circuit board through pins. The electric devices are all provided with six pole plates. The pole plates can use pole plates with the same structure. The six pole plates all include a substrate and pole teeth. The number of pole teeth is the same. The substrate of each pole plate is provided with a defective portion 1102, a positioning hole 1103, a positioning protrusion 1104, four or more through holes 1105, and two limiting portions 1101. The positioning hole 1103 is larger than the positioning protrusion 1104; the protruding direction of the positioning protrusion 1104 is opposite to the protruding direction of the pole teeth, and the number of through holes 1105 is specifically 8. The magnetic rotor 24 is located on the inner side of the three windings of the stator assembly. The axial position of the magnetic rotor 24 corresponds to the axial position of the three windings of the stator assembly, that is, the three windings are all located on the outside of the magnetic rotor. Other structures and methods of the electric device can refer to Figure 18 and other embodiments above.

[0047] The above relatively clearly and completely describes the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Those skilled in the art should understand that the technical features of the above-mentioned embodiments can be combined arbitrarily, and as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above description of the disclosed embodiments enables professionals and technicians in this field to easily implement or use the present application. For professionals and technicians in this field, without departing from the spirit or scope of the present application, the implementation can be modified and combined in other embodiments. Therefore, the present application will not be limited to the embodiments shown herein, but will comply with the corresponding scope consistent with the principles and novel features disclosed herein.

Claims

1. A stator assembly, the stator assembly (10) comprising: A first winding, a second winding, and a third winding, the three windings are arranged in the axial direction, and the second winding is located between the first winding and the third winding; the stator assembly (10) comprises a housing, and six pole plates: a first pole plate (111), a second pole plate (112), a third pole plate (113), a fourth pole plate (114), a fifth pole plate (115), and a sixth pole plate (116); the six pole plates each comprise a substrate and pole teeth, the number of the pole teeth of the six pole plates being the same, and the pole teeth extending in the axial direction; the substrate of each of the six pole plates is provided with at least two limiting portions (1101), two limiting portions (1102), and a limiting portion (1103). More than one through hole (1105) is provided on the second pole plate, the third pole plate, the fourth pole plate and the fifth pole plate; the second pole plate (111) and the second pole plate (112) are all provided with positioning holes (1103) and positioning protrusions (1104); the pole teeth of the first pole plate (111) and the second pole plate (112) are located on the inner side of the first winding, the pole teeth of the third pole plate (113) and the fourth pole plate (114) are located on the inner side of the second winding, and the pole teeth of the fifth pole plate (115) and the sixth pole plate (116) are located on the inner side of the third winding; the shell is matched with the six pole plates, and the wall of the shell is located on the outer side of the six pole plates.

2. The stator assembly according to claim 1, characterized in that The six pole plates all include a missing portion, and the missing portions (1102) of the six pole plates are located on the same side of the circumference of the stator assembly. The protruding direction of the positioning protrusion (1104) of any pole plate of the six pole plates is opposite to the protruding direction of the pole teeth of the pole plate. The pole teeth of the first pole plate (111) are at least partially located between two adjacent pole teeth of the second pole plate (112), and the pole teeth of the second pole plate (112) are at least partially located between two adjacent pole teeth of the first pole plate (111); the pole teeth of the third pole plate (113) are at least partially located between two adjacent pole teeth of the fourth pole plate (114), and the pole teeth of the fourth pole plate (114) are at least partially located between two adjacent pole teeth of the third pole plate (113); the pole teeth of the fifth pole plate (115) are at least partially located between two adjacent pole teeth of the sixth pole plate (116), and the sixth pole plate (117) is at least partially located between two adjacent pole teeth of the sixth pole plate (117). The pole teeth of the plate (116) are at least partially located between two adjacent pole teeth of the fifth pole plate (115); the third pole plate and the fourth pole plate are located between the second pole plate and the fifth pole plate, the substrate of the second pole plate and the substrate of the third pole plate are arranged back to back or relatively close to each other, the positioning protrusion (1104) of the second pole plate is at least partially located in the positioning hole (1103) of the third pole plate, and the positioning protrusion (1104) of the third pole plate is at least partially located in the positioning hole (1103) of the second pole plate; the substrate of the fourth pole plate and the substrate of the fifth pole plate are arranged back to back or relatively close to each other, the positioning protrusion (1104) of the fourth pole plate is at least partially located in the positioning hole (1103) of the fifth pole plate, and the positioning protrusion (1104) of the fifth pole plate is at least partially located in the positioning hole (1103) of the fourth pole plate.

3. The stator assembly according to claim 2, characterized in that The substrates of the six pole plates have the same thickness, the structures of the defective parts of the six pole plates have the same structure, the pole teeth of the six pole plates have the same height, the limiting parts (1101) of the six pole plates are notches, the number and size of the notches are the same, the number of the positioning holes (1103) of the six pole plates is the same, the number of the positioning protrusions (1104) of the six pole plates is the same, and the number of the through holes (1105) of the six pole plates is the same; the number of the positioning holes of any of the six pole plates is greater than or equal to the number of the positioning protrusions (1104) of the pole plate, and the positioning hole is larger than the positioning protrusion (1104) of the pole plate.

4. The stator assembly according to claim 1 or 2, characterized in that: The third electrode plate and the fourth electrode plate are located between the second electrode plate and the fifth electrode plate, the substrate of the second electrode plate is arranged back to back or relatively close to the substrate of the third electrode plate, the limiting portion (1101) of the second electrode plate corresponds to the position of the limiting portion (1101) of the third electrode plate, and at least two of the through holes (1105) of the second electrode plate correspond to the position of the through holes (1105) of the third electrode plate; the substrate of the fourth electrode plate is arranged back to back or relatively close to the substrate of the fifth electrode plate, the limiting portion (1101) of the fourth electrode plate corresponds to the position of the limiting portion (1101) of the fifth electrode plate, and at least two of the through holes (1105) of the fourth electrode plate correspond to the position of the through holes (1105) of the fifth electrode plate.

5. The stator assembly according to any one of the preceding claims, characterized in that: The six electrode plates all include a defective portion, and the outer ends of the substrates of the six electrode plates are of the same size. A line connecting the center (O) of the substrate of the electrode plate and the center (N) of the defective portion 1102 corresponding to the substrate is defined as a center line (ON). The electrode plate includes two limiting portions (1101), and the two limiting portions (1101) are of the same size and are symmetrically distributed with respect to the center line (ON). The positioning protrusion (1104) and the positioning hole (1103) are symmetrically arranged with respect to the center line ON, and the positioning hole (1103) is larger than the positioning protrusion (1104). There are more than four through holes (1105), and two through holes (1105) are symmetrically arranged with respect to the other two through holes with respect to the center line (ON).

6. The stator assembly according to claim 5, characterized in that The pole plate comprises two positioning protrusions (1104) and two positioning holes (1103), wherein one positioning protrusion (1104) and one positioning hole (1103) are symmetrically arranged with respect to the center line ON, and the other positioning protrusion (1104) and the other positioning hole (1103) are symmetrically arranged with respect to the center line ON; the pole teeth of the pole plate, the two pole teeth (117, 118) on both sides of the pole teeth (117, 118) closest to the defective portion and closest to the center line (ON), are defined as pole tooth center lines by a line (OM, OP) connecting the centers (M, P) of the pole teeth (117, 118) and the center (O) of the substrate, wherein an angle between the pole tooth center line of one pole tooth and the center line ON is different from an angle between the pole tooth center line of the other pole tooth and the center line ON.

7. The stator assembly according to any one of claims 1 to 4, characterized in that: Looking from the first electrode plate to the sixth electrode plate, the limiting portion of the second electrode plate is deflected at an angle relative to the limiting portion of the first electrode plate, the limiting portion of the fourth electrode plate is deflected at an angle relative to the limiting portion of the third electrode plate, and the limiting portion of the sixth electrode plate is deflected at an angle relative to the limiting portion of the fifth electrode plate; the deflection direction of two of the three groups of deflection angles is clockwise and the other group is counterclockwise, or the rotation direction of two of the three groups of rotation angles is counterclockwise and the other group is clockwise; the angles of two of the three groups of deflection angles are the same.

8. The stator assembly according to any one of claims 1 to 4, characterized in that: The line connecting the center of the pole tooth and the center (O) of the substrate is defined as the pole tooth center line; the angles between the pole tooth center lines of two adjacent pole teeth of the same pole plate are the same; a pole tooth of the first pole plate corresponding to the first winding is staggered at an angle (θ) with the pole tooth of the third pole plate corresponding to the second winding that is circumferentially closest to the first pole plate, and a pole tooth of the third pole plate corresponding to the second winding is staggered at an angle (θ) with the pole tooth of the fifth pole plate corresponding to the third winding that is circumferentially closest to the third pole plate, and these two staggered angles (θ) are the same.

9. The stator assembly according to any one of the preceding claims, characterized in that The stator assembly includes a winding assembly, the winding assembly includes a plate frame component, the plate frame component is an integrated structure, and the plate frame component is formed by insert injection molding of a plate assembly including at least the six plates; the plate frame component includes a side wall (125) fixed to the inner surface of the substrate of the plate, a bottom wall (126) covering at least a portion of the pole teeth, and three groups of pin connection parts, the thickness (δ) of the side wall (125) is less than the thickness of the substrate of the plate; the radial protrusion directions of the three groups of pin connection parts are consistent, and the thickness (δ1) of the axial two side parts of the end of two groups of pin connection parts of the three groups of pin connection parts is less than the distance (δ2) between the parts of the two side walls connected to the pin connection parts.

10. The stator assembly according to claim 9, characterized in that The stator assembly comprises a main body (130), a raised portion (131), an extension portion (133), and a connection portion (160); the raised portion (131) is axially protruding from the main body; the extension portion (133) is laterally protruding from the main body; the connection portion is axially protruding from the extension portion; the raised portion and the connection portion have the same protruding direction; the raised portion and the connection portion are fixedly connected via the raised connection portion; the stator assembly is provided with at least three pins for electrical connection on the connection portion; one of the three pins is electrically connected to one end of the first winding, one is electrically connected to one end of the second winding, and one is electrically connected to one end of the third winding; The other end of the first winding is electrically connected to the other end of the second winding, and the other end of the first winding is electrically connected to the other end of the third winding; or the other end of the first winding is electrically connected to the other end of the second winding, and the other end of the second winding is electrically connected to the other end of the third winding.

11. The stator assembly according to claim 9, wherein: The shell and the electrode plates are made of soft magnetic material, and the wall of the shell and the outer end portion (1106) of the electrode plate are gap-fitted or transition-fitted; the six electrode plates all include a missing portion, the substrate of the second electrode plate and the substrate of the third electrode plate are back-to-back or relatively close to each other, and the missing portion of the second electrode plate corresponds to the position of the missing portion of the third electrode plate, the substrate of the fourth electrode plate and the substrate of the fifth electrode plate are back-to-back or relatively close to each other, and the missing portion of the fourth electrode plate corresponds to the position of the missing portion of the fifth electrode plate; the missing portion of the first electrode plate is deflected relative to the missing portion of the second electrode plate, and the missing portion of the sixth electrode plate is deflected relative to the missing portion of the fifth electrode plate; the three groups of pin connection portions and the missing portions are located on the same side.

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