Electromotive device

Abstract

The application relates to an electric device, comprising a valve assembly and a stator assembly, the valve assembly comprising a magnetic rotor, the magnetic rotor comprising first magnetic poles and second magnetic poles, the first magnetic poles and the second magnetic poles being alternately arranged along a circumferential direction of the magnetic rotor, the stator assembly comprising a winding and a claw pole shell, the winding being located in the claw pole shell, the claw pole shell comprising first tooth poles and second tooth poles, the first tooth poles and the second tooth poles being alternately arranged between an outer periphery of the magnetic rotor and an inner periphery of the winding, the maximum value of an arc of the first tooth pole being defined as alpha, the number of the first magnetic poles being defined as P, and 0.43 <= alpha*P / PI <= 0.57, so that the average torque of the electric device is relatively larger under the same condition, the magnetic leakage problem and the magnetic saturation problem of the tooth pole are reduced, and the driving performance of the electric device is improved.

Description

Technical Field

[0001] This application relates to automotive thermal management systems, and more specifically to an electric device. Background Technology

[0002] The related electric device is an important component of the automotive thermal management system, including windings and claw pole housings. The windings are located inside the claw pole housings, which include several toothed poles that are alternately arranged around the rotor assembly. In order to meet the automotive requirements for miniaturization, the number of turns in the windings is relatively small, and the current applied to the windings is relatively large. However, this also makes the leakage flux and magnetic saturation problems of the toothed poles more serious, which in turn causes the motor's drive performance to be lower than expected. Utility Model Content

[0003] The purpose of this application is to provide an electric device that improves the driving performance of the electric device.

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

[0005] An electric actuator includes a valve assembly and a stator assembly. The valve assembly includes a magnetic rotor, which includes a first magnetic pole and a second magnetic pole, which are alternately arranged along the circumferential direction of the magnetic rotor. The stator assembly includes a winding and a claw pole housing. The winding is located inside the claw pole housing, which includes a first tooth and a second tooth. The first tooth and the second tooth are alternately arranged between the outer circumference of the magnetic rotor and the inner circumference of the winding. The maximum arc value of the first tooth is defined as α, and the number of the first magnetic poles is defined as P, where 0.43 ≤ α * P / π ≤ 0.57.

[0006] In such an electric actuator, 0.43≤α*P / π≤0.57, under the same conditions, makes the average torque of the electric actuator relatively larger, which is beneficial to reducing the leakage magnetic field and magnetic saturation problem of the tooth pole, and thus improving the driving performance of the electric actuator. Attached Figure Description

[0007] Figure 1 A cross-sectional structural schematic diagram of the electric device provided in the embodiments of this application;

[0008] Figure 2 for Figure 1 A cross-sectional structural diagram showing the positional relationship between the middle stator assembly and the magnetic rotor;

[0009] Figure 3 for Figure 2 A three-dimensional structural diagram of the intermediate coil assembly;

[0010] Figure 4 for Figure 3An exploded view of the intermediate coil assembly;

[0011] Figure 5 for Figure 3 A partial structural diagram of the outer shell of the middle claw pole from one perspective;

[0012] Figure 6 for Figure 3 A schematic diagram showing the positional relationship between the first housing and the magnetic rotor;

[0013] Figure 7 Based on Figure 1 A schematic diagram of the relationship curve between Ra and Tavg obtained by the electric actuator;

[0014] Figure 8 Based on Figure 1 A schematic diagram of the relationship curve between Ra and Trip obtained by the electric actuator;

[0015] Figure 9 Based on Figure 1 A schematic diagram of the relationship curves between Hr and Tavg and between Hr and Trip obtained by the electric motor;

[0016] Figure 10 Based on Figure 1 A schematic diagram showing the relationship between Rb and Tavg and the relationship between Rb and Trip obtained by the electric actuator;

[0017] Figure 11 Based on Figure 1 A schematic diagram of the relationship between Rh1 and Tavg obtained by the electric motor;

[0018] Figure 12 Based on Figure 1 A schematic diagram showing the relationship between Rd and Tavg obtained by the electric actuator;

[0019] In the diagram: 10-Electrical actuator, 100-Stator assembly, 200-Valve assembly, 110-Coil assembly, 120-Encapsulation, 130-Circuit board assembly, 111-Winding, 112-Claw pole housing, 113-Coil bobbin, 114-Pin, 121-Valve cavity, 122-Control cavity, 1121-First housing, 1122-Second housing, 1121a-First substrate, 1121b-First tooth pole, 1121aa-First end face, 1121 ba - first segment, 1121bb - second segment, 1121bc - tooth top surface, 1121bd - first side surface, 1122a - second substrate, 1122b - second tooth pole, 1122aa - second end face, 1122ba - second side surface, 210 - rotor assembly, 211 - magnetic rotor, 212 - valve core, 2111 - first magnetic pole, 2112 - second magnetic pole, 220 - valve port, 230 - sleeve, 240 - valve body, 250 - throttling port. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0021] The following is combined Figures 1 to 12 This application provides a detailed description of an electric device 10 according to an embodiment. Such an electric device 10 includes a valve assembly 200 and a stator assembly 100. The valve assembly 200 includes a rotor assembly 210, a sleeve 230, a valve port 220, and a valve body 240. The stator assembly 100 includes a coil assembly 110, an encapsulation portion 120, and a circuit board assembly 130. The rotor assembly 210 includes a magnetic rotor 211 and a valve core 212. The coil assembly 110 includes a winding 111, a claw pole housing 112, a coil frame 113, and a pin 114.

[0022] In one possible implementation, the rotor assembly 210 includes a first magnetic pole 2111 and a second magnetic pole 2112, which are alternately arranged along the circumferential direction of the magnetic rotor 211. The coil assembly 110 includes a winding 111 and a claw pole housing 112. The winding 111 is located inside the claw pole housing 112. The claw pole housing 112 includes a first tooth pole 1121b and a second tooth pole 1122b, which are alternately arranged between the inner circumference of the winding 111 and the outer circumference of the magnetic rotor 211 along the circumferential direction of the winding 111. The ratio of the maximum arc value of the first tooth pole 1121b to the arc value of the first magnetic pole 2111 is greater than or equal to 0.43 but less than or equal to 0.57.

[0023] For ease of understanding, such as Figure 5 and Figure 6As shown, in this embodiment, the first magnetic pole 2111 is defined as the N pole, and the second magnetic pole 2112 is defined as the S pole. The N pole and the S pole are alternately arranged along the circumference of the magnetic rotor 211. The magnetic rotor 211 arranged in this way can rotate relative to the stator assembly 100 under the action of the rotating magnetic field generated by the stator assembly 100. The number of N poles is the same as the number of S poles, and the number of N poles equals the number of S poles, which is defined as P. The curvature of the N poles is also basically the same as the curvature of the S poles. The cross-section of the N pole can be regarded as an arc centered on the magnetic rotor 211, and the S pole can also be regarded as an arc centered on the magnetic rotor 211. The curvature of the N pole can be calculated based on the number of magnetic poles, that is, the curvature of the N pole is equal to the curvature of the S pole, which is equal to 2π / 2P.

[0024] like Figures 1 to 3 As shown, the first tooth pole 1121b and the second tooth pole 1122b are arranged alternately. The first tooth pole 1121b and the second tooth pole 1122b are alternately arranged between the inner circumference of the winding 111 and the outer circumference of the magnetic rotor 211 along the circumferential direction of the winding 111. The cross-section of the first tooth pole 1121b can be considered as an arc centered on the magnetic rotor 211, and the curvature of the maximum cross-section of the first tooth pole 1121b can be considered as the maximum curvature of the first tooth pole 1121b. The cross-section of the second tooth pole 1122b can also be... Considering the arc centered on the magnetic rotor 211, the arc of the maximum cross-section of the second tooth pole 1122b can be regarded as the maximum arc value of the second tooth pole 1122b. Define the maximum arc value of the first tooth pole 1121b as α. The maximum arc value of the second tooth pole 1122b is basically the same as the maximum arc value of the first tooth pole 1121b. Define the ratio of the maximum arc value of the claw pole outer shell 112 to the arc value of the magnetic pole of the magnetic rotor 211 as Ra. Then, Ra=α*P / π, 0.43≤Ra≤0.57.

[0025] In this embodiment, it should be noted that the plane containing the cross-section is perpendicular to the axial direction of the winding 111, and the curvature of the cross-section is equal to the average of the outer curvature and the inner curvature of the cross-section.

[0026] In some embodiments, the difference between the inner arc radius and the outer arc radius of the cross-section can be ignored. The inner arc radius of the cross-section can be used as the arc radius of the cross-section, and the outer arc radius of the cross-section can also be used as the arc radius of the cross-section.

[0027] Define Tavg as the average torque of the electric actuator 10. Figure 7 This illustrates the relationship curves between Ra and Tavg under the same conditions. For example... Figure 7As shown, the average torque of the electric device is greater when 0.43≤Ra≤0.57 than when Ra>0.57 and when Ra<0.43, which makes the driving performance of the electric device 10 relatively better and helps to reduce the leakage magnetic problem and magnetic saturation problem of the electric device 10.

[0028] In some embodiments, 0.48 ≤ Ra ≤ 0.5 and 0.53 ≤ Ra ≤ 0.55, such as Figure 7 As shown, the average torque of the electric device 10 is greater when 0.48≤Ra≤0.5 and 0.53≤Ra≤0.55 than when 0.43≤Ra≤0.57.

[0029] In some embodiments, 0.53 ≤ Ra ≤ 0.55, Trip is defined as the torque ripple of the electric device 10. Figure 8 This illustrates the relationship curve between Ra and Trip under the same conditions. For example... Figure 8 As shown, with the increase of Ra, Trip generally shows a gradual decreasing trend. When 0.53 ≤ Ra ≤ 0.55, the torque fluctuation of the electric device 10 is smaller than that when Ra < 0.53. When 0.53 ≤ Ra ≤ 0.55, the torque fluctuation of the electric device 10 is basically unchanged or negligible compared to that when Ra > 0.55. In summary, when 0.53 ≤ Ra ≤ 0.55, the average torque of the electric device 10 is relatively large, and the torque fluctuation of the electric device 10 is relatively small, which is beneficial to improving the driving performance of the electric device 10 and reducing the vibration and noise problems of the electric device 10.

[0030] In some embodiments, Ra = 0.5.

[0031] like Figure 3 and Figure 4 As shown, in this embodiment, the winding 111 is made of enameled wire wound on the coil frame 113, and is roughly helical in shape. The number of turns of the winding 111 is defined as N. The coil frame 113 is made of plastic with insulating properties. The winding 111 and the coil frame 113 are generally located in the coil cavity 1123 of the claw pole housing 112. The insulating frame can isolate the winding 111 from the claw pole housing 112. The winding 111 can generate a rotating magnetic field acting on the magnetic rotor 211 through the claw poles of the claw pole housing 112.

[0032] like Figure 2As shown, in this embodiment, the claw pole housing 112 includes a first housing 1121 and a second housing 1122. The first housing 1121 and the second housing 1122 cooperate to form a coil cavity 1123, so that during the assembly of the coil assembly 110, the winding 111 and the insulating frame are first placed between the first housing 1121 and the second housing 1122, and then the first housing 1121 and the second housing 1122 are fitted together so that the winding 111 and the coil frame 113 can be put into the coil cavity 1123.

[0033] In some embodiments, the first housing 1121 and the second housing 1122 are integrally formed.

[0034] In one possible implementation, the claw electrode housing 110 includes a first substrate 1121a and a second substrate 1122a. A first tooth 1121b extends from the first substrate 1121a along the axial direction of the winding 111, and a second tooth extends from the second substrate 1122a along the axial direction of the winding 111. The first substrate 1121a, the winding 111, and the second substrate 1122a are arranged along the axial direction of the winding 111. The ratio of the distance between the bottom surface of the first substrate 1121a and the top surface of the first tooth 1121b along the axial direction of the winding 111 to the distance between the bottom surface of the first substrate 1121a and the bottom surface of the second substrate 1122a along the axial direction of the winding 111 is greater than or equal to 0.69 but less than or equal to 0.83.

[0035] For ease of understanding, such as Figure 4 and Figure 5 As shown, the bottom surface of the first substrate 1121a is defined as the first end surface 1121aa, located on the side of the first substrate 1121a away from the winding 111. The bottom surface of the second substrate 1122a is defined as the second end surface 1122aa, located on the side of the second substrate 1122a away from the winding 111. The top surface of the first tooth pole 1121b is defined as the tooth tip surface 1121bc, located at the end of the first tooth pole 1121b away from the first substrate 1121a. Along the axial direction of the winding 111, the distance between the tooth tip surface 1121bc and the first end surface 1121aa is defined as h, and the distance between the first end surface 1121aa and the second end surface 1122aa is defined as h2. h / h2 is defined as Hr, where 0.69 ≤ Hr ≤ 0.83. Figure 9 This illustrates the relationship curves between Hr and Tavg under the same conditions. (From...) Figure 9It can be seen that the average torque of the electric actuator 10 is greater when 0.69 ≤ Hr ≤ 0.83 than when Hr < 0.69. After Hr > 0.83, increasing h relative to h2 actually makes the magnetic saturation problem of the teeth of the claw pole housing 112 more prominent. Therefore, limiting Hr between 0.69 and 0.83 is beneficial to improving the magnetic flux of the teeth and rotor of the claw pole housing 112, and also beneficial to reducing the magnetic saturation problem of the teeth of the claw pole housing 112.

[0036] In this embodiment, Ra = 0.5 and 0.69 ≤ Hr ≤ 0.83, which helps to reduce the leakage magnetic field problem and magnetic saturation problem of the electric device 10 with relatively good driving performance.

[0037] In this embodiment, the length direction of h is perpendicular to the plane where the first end face 1121aa is located, the length direction of h2 is perpendicular to the plane where the first end face 1121aa is located, and the length direction of h2 is perpendicular to the plane where the second end face 1122aa is located.

[0038] In this embodiment, the tooth tip surface 1121bc is a plane, and the plane containing the tooth tip surface can be parallel to the cross-section of the claw pole. The length direction of h is perpendicular to the plane containing the tooth tip surface 1121bc.

[0039] In some embodiments, the tooth tip surface 1121bc is an arc surface, and a central axis is defined passing through the tooth tip surface 1121bc. The tooth tip surface 1121bc is symmetrical about the central axis. The central axis is parallel to the axial direction of the winding 111. The vertical distance from the intersection of the central axis and the tooth tip surface 1121bc to the first end face 1121aa is h.

[0040] like Figure 4 As shown, in this embodiment, the first housing 1121 is stamped from galvanized steel sheet. The first housing 1121 includes a first substrate 1121a and a plurality of first toothed poles 1121b. The first substrate 1121a is generally annular. The second housing 1122 is also stamped from galvanized steel sheet. The second housing 1122 includes a second substrate 1122a and a plurality of second toothed poles 1122b. The second substrate 1122a is generally annular.

[0041] In this embodiment, the thickness of the galvanized steel sheet can be 0.7 to 0.8 mm.

[0042] In one possible implementation, the first tooth pole 1121b includes a first segment 1121ba, the curvature of the first segment 1121ba remains unchanged along the winding axial direction, and the ratio of the length of the first segment 1121ba along the winding axial direction to the distance between the bottom surface of the first substrate 1121a and the bottom surface of the second substrate 1122a along the winding axial direction is 0.125.

[0043] For ease of understanding, such as Figure 5 and Figure 6 As shown, in this embodiment, the first segment 1121ba extends from the first substrate 1121a along the axial direction of the winding 111. The cross-sectional curvature of the first segment 1121ba can be considered as the curvature of the first segment 1121ba. Along the axial direction of the winding 111, the curvature of the first segment 1121ba remains essentially unchanged, or its variation is within the allowable error range and can be ignored. The length of the first segment 1121ba along the axial direction of the winding 111 is defined as h1, and the length direction of h1 is parallel to the length direction of h2. h1 / h2 is defined as Rh1, where 0 < Rh1 ≤ 0.125. Figure 11 This illustrates the relationship between Rh1 and the average torque under the same conditions. Figure 11 It can be seen that when 0 < Rh1 ≤ 0.125, the average torque fluctuation range of the electric device 10 is smaller than that when Rh1 > 0.125. Therefore, when Rh1 ≤ 0.125, the torque fluctuation of the electric device 10 is smaller, which is beneficial to reducing the vibration and noise problems of the electric device 10.

[0044] In this embodiment, the maximum arc value of the first tooth pole 1121b is equal to the arc value of the first segment 1121ba.

[0045] In one possible implementation, the first tooth pole 1121b includes a second segment 1121bb, the curvature of the second segment 1121bb gradually decreases along the axial direction of the winding 111, the maximum curvature of the second segment 1121bb is equal to the curvature of the first tooth pole 1121b, and the ratio of the minimum curvature of the second segment 1121bb to the maximum curvature of the first tooth pole 1121b is less than or equal to 0.36.

[0046] For ease of understanding, in this embodiment, as... Figure 5 As shown, the outer contour of the second segment is roughly conical. The second segment 1121bb extends along the axial direction of the winding 111 and is located on the side of the first segment 1121ba away from the first substrate 1121a. The first substrate 1121a, the first segment 1121ba, and the second segment 1121bb are an integral structure. The minimum arc of the second segment 1121bb is equal to the arc of the tooth tip surface 1121bc, and the maximum arc of the second segment 1121bb is equal to the arc of the first segment 1121ba. The arc of the tooth tip surface 1121bc is defined as b. b / α is defined as Rb, 0 < Rb ≤ 0.36. Figure 10 This illustrates the relationship curves between Rb and Tavg, and between Rb and Trip, under the same conditions. Figure 10It can be seen that the average torque when 0 < Rb ≤ 0.36 does not change significantly compared to the average torque when Rb > 0.36. However, the torque fluctuation when 0 < Rb ≤ 0.36 is smaller than the torque fluctuation when Rb > 0.36. When Rb > 0.36, the torque fluctuation increases with the increase of Rb. This is not conducive to reducing the noise and vibration of the electric device 10. Therefore, limiting Rb to between 0 and 0.36 makes the torque fluctuation of the electric device 10 relatively small, which is beneficial to reducing the noise and vibration of the electric device 10.

[0047] In some embodiments, the tooth tip surface 1121bc is an arc surface, and the maximum value of the cross-section of the first tooth pole 1121b passing through the tooth tip surface 1121bc is used as the minimum value of the arc of the second segment 1121bb.

[0048] In one possible implementation, the first tooth pole 1121b includes a first side surface 1121bd, and the second tooth pole 1122b includes a second side surface 1122ba. The second side surface 1122ba is disposed opposite to the first side surface 1121bd. The inner arc surface of the first tooth pole 1121b is disposed opposite to the outer peripheral surface of the magnetic rotor 211. The ratio of the shortest distance between the first side surface 1121bd and the second side surface 1122ba to the shortest distance between the inner arc surface of the first tooth pole 1121b and the outer peripheral surface of the magnetic rotor 211 is greater than or equal to 0.78 but less than or equal to 1.4.

[0049] For ease of understanding, such as Figure 4 and Figure 5 As shown, the plane containing the first side 1121bd is inclined relative to the axial direction of the winding 111. The first side 1121bd is located on the side of the first tooth pole 1121b closer to the second tooth pole 1122b. The plane containing the second side 1122ba is substantially parallel to the plane containing the first side 1121bd, and the second side 1122ba is located on the side of the second tooth pole 1122b closer to the first side 1121bd. The shortest distance between the first side 1121bd and the second side 1122ba is defined as d, and the length direction of d is perpendicular to the plane containing the first side 1121bd and also perpendicular to the plane containing the second side 1122ba. The inner arc surface of the first tooth pole 1121b is located on the side of the first tooth pole 1121b closest to the magnetic rotor 211. The inner arc surface of the first tooth pole 1121b is basically parallel to the outer circumferential surface of the magnetic rotor 211. The shortest distance between the inner arc surface of the first tooth pole 1121b and the outer circumferential surface of the magnetic rotor 211 is defined as Gap. The straight line containing the length direction of Gap passes through the axis of the magnetic rotor 211 and also through the arc center of the first tooth pole 1121b. Define d / Gap = Rd, 0.78 ≤ Rd ≤ 1.4. Figure 12 This illustrates the relationship between Rd and average torque under the same conditions. Figure 12 The dashed line represents the envelope when the average torque is at its maximum. Figure 12 It can be seen that when Rd < 0.78, the maximum average torque of electric device 2 is smaller than that when 0.78 ≤ Rd ≤ 1.4. When Rd < 0.78, magnetic leakage is more likely to occur between the poles of electric device 10, resulting in a relatively small magnetic flux and thus hindering the improvement of the torque of electric device 10. When Rd > 1.4, the maximum average torque of electric device 2 is still smaller than that when 0.78 ≤ Rd ≤ 1.4. When Rd < 0.78, electric device 10 is more prone to magnetic saturation. Therefore, when Rd is between 0.78 and 1.4, the magnetic saturation and magnetic leakage problems of electric device 10 are improved, and the average torque of electric device 10 is relatively larger, which is beneficial to improving the driving performance of electric device 10.

[0050] In this embodiment, as Figures 2 to 5 As shown, the encapsulation portion 120 is injection molded with the coil assembly 110 as an insert, and part of the encapsulation portion 120 is located between the first side 1121bd and the second side 1122ba.

[0051] In some embodiments, the first side 1121bd and the second side 1122ba are spaced apart, with the first side 1121bd directly opposite the second side 1122ba.

[0052] In this embodiment, as Figure 2 As shown, the magnetic rotor 210 is located inside the sleeve 230, and the coil assembly 110 is surrounded around the outer periphery of the sleeve 230. Part of the sleeve 230 is disposed between the outer peripheral surface of the magnetic rotor 210 and the inner arc surface of the claw pole of the claw pole housing 112. The sleeve 230 alternately sets the outer peripheral surface of the magnetic rotor 210 and the inner arc surface of the claw pole of the claw pole housing 112.

[0053] In one possible implementation, the product of the number of turns of winding 111 and the peak current applied to winding 111 is greater than or equal to 170 turns-amperes but less than or equal to 180 turns-amperes, that is, the ampere-turns of the electric device 10 are greater than or equal to 170 turns-amperes but less than or equal to 180 turns-amperes, and the ratio of the number of turns of winding 111 to the peak current applied to winding 111 is not less than 700 turns / ampere but not greater than 1950 turns / ampere.

[0054] For ease of understanding, in this embodiment, the current applied to the winding 111 is defined as I, the peak value of this current is Ip, and the ampere-turns of the electric device 10 are N*Ip. It should be noted that I, Ip, and N can all be rated values. 170 turns / ampere ≤ N*Ip ≤ 180 turns / ampere: at this ampere-turn count, the electric device 10 can better regulate fluids such as refrigerant in the thermal management system, and the electric device 10 can meet the driving performance requirements of the automotive thermal management system. 700 turns / ampere ≤ N / Ip ≤ 1950 turns / ampere: for the same ampere-turn count, the winding 111 of the electric device 10 has relatively fewer turns, and the current applied to the winding 111 is relatively larger, thus making the high-performance electric device 10 relatively smaller in size, which helps to reduce the space occupied by the automotive thermal management system in the vehicle.

[0055] In some embodiments, the number of turns of the winding 111 is no more than 585 turns, and the peak current applied to the winding 111 is no less than 0.3 amperes. This configuration makes the size of the electric device 10 relatively small and the current relatively large. Moreover, limiting Ra to between 0.43 and 0.57 can improve the driving performance of the small-sized, high-current electric device 10, reduce its heat generation problem, and improve its working efficiency.

[0056] In some embodiments, the winding 111 further has 350 turns and the peak current applied to the winding 111 is 0.5 amperes.

[0057] In one possible implementation, a throttling orifice 250 is formed between the valve port 220 and the valve core 212, and the magnetic rotor 211 can drive the valve core 212 to move relative to the valve port 220, thereby adjusting the flow area of ​​the throttling orifice 250.

[0058] For ease of understanding, such as Figure 1 As shown, the valve port 220 has a valve port, and a throttling orifice 250 is formed between the outer wall of the valve core 212 and the inner wall forming the valve port. The magnetic rotor 211 is in a limiting fit with the valve core 212. When the magnetic rotor 211 rotates relative to the stator assembly 100, the valve core 212 can move axially relative to the valve port 220. The valve core 212 can sit on the valve port 220 or leave the valve port 220, which changes the flow area of ​​the throttling orifice 250, thereby causing the electric device 10 to throttle and expand the refrigerant.

[0059] In this embodiment, as Figure 1 As shown, the encapsulation part 120 has a valve cavity 121, and the sleeve 230 is basically located in the valve cavity 121.

[0060] In this embodiment, as Figure 1As shown, the encapsulation portion 120 has a control cavity 122, the circuit board assembly 130 is located in the control cavity 122, and the circuit board assembly 130 is electrically connected to the winding 111.

[0061] In summary, when Ra of the electric actuator 10 is between 0.43 and 0.57, N*Ip is between 170 and 180 turns / amperes, N / Ip is between 700 and 1950 turns / amperes, Hr is between 0.69 and 0.83, Rh1 is between 0 and 0.125, Rb is between 0 and 0.36, and Rd is between 0.78 and 1.4, the size of the electric actuator 10 can be relatively smaller, the torque of the electric actuator 10 can be relatively larger, and the torque fluctuation of the electric actuator 10 can be relatively smaller, thereby improving the overall performance of the electric actuator 10. Therefore, under the same ampere-turns and magnetic rotor 211 performance, the relatively higher performance requirements of the automotive thermal management system for the electric actuator 10 can be met.

[0062] 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 the 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. An electric device, characterized in that, The system includes a valve assembly (200) and a stator assembly (100). The valve assembly (200) includes a magnetic rotor (211), which includes a first magnetic pole (2111) and a second magnetic pole (2112). The first magnetic pole (2111) and the second magnetic pole (2112) are alternately arranged along the circumferential direction of the magnetic rotor (211). The stator assembly (100) includes a winding (111) and a claw pole housing (112). The winding (111) is located in the... Inside the claw pole housing (112), the claw pole housing (112) includes a first tooth pole (1121b) and a second tooth pole (1122b). The first tooth pole (1121b) and the second tooth pole (1122b) are alternately arranged between the outer periphery of the magnetic rotor (211) and the inner periphery of the winding (111). The maximum arc value of the first tooth pole (1121b) is defined as α, and the number of the first magnetic poles (2111) is defined as P, where 0.43≤α*P / π≤0.

57.

2. The electric device according to claim 1, characterized in that, The claw electrode housing (112) includes a first substrate (1121a) and a second substrate (1122a). The first toothed electrode (1121b) extends from the first substrate (1121a) along the axial direction of the winding (111), and the second toothed electrode (1122b) extends from the second substrate (1122a) along the axial direction of the winding (111). The first substrate (1121a), the winding (111), and the second substrate (1122a) are arranged along the axial direction of the winding (111). The distance between the bottom surface of the first substrate (1121a) and the top surface of the first toothed electrode (1121b) along the axial direction of the winding (111) is defined as h, and the distance between the bottom surface of the first substrate (1121a) and the bottom surface of the second substrate (1122a) along the axial direction of the winding (111) is defined as h2. 0.69≤h / h2≤0.

83.

3. The electric device according to claim 2, characterized in that, The first tooth pole (1121b) includes a first segment (1121ba), the arc of the first segment (1121ba) remains unchanged along the axial direction of the winding (111), and the length of the first segment (1121ba) along the axial direction of the winding (111) is defined as h1, h1 / h2≤0.

125.

4. The electric actuator according to any one of claims 1 to 3, characterized in that, The first tooth pole (1121b) includes a second segment (1121bb). The curvature of the second segment (1121bb) gradually decreases along the axial direction of the winding (111). The maximum curvature of the second segment (1121bb) is equal to the maximum curvature of the first tooth pole (1121b). The minimum curvature of the second segment (1121bb) is defined as b, where b / α ≤ 0.

36.

5. The electric actuator according to any one of claims 1 to 4, characterized in that, The first tooth pole (1121b) includes a first side surface (1121bd), and the second tooth pole (1122b) includes a second side surface (1122ba). The second side surface (1122ba) is arranged opposite to the first side surface (1121bd). The shortest distance between the first side surface (1121bd) and the second side surface (1122ba) is defined as d. The inner arc surface of the first tooth pole (1121b) is arranged opposite to the outer peripheral surface of the magnetic rotor (211). The shortest distance between the inner arc surface of the first tooth pole (1121b) and the outer peripheral surface of the magnetic rotor is defined as Gap, where 0.78≤d / Gap≤1.

4.

6. The electric actuator according to any one of claims 1 to 5, characterized in that, The number of turns of the winding (111) is defined as N, and the peak current applied to the winding (111) is defined as Ip, 170 turns ampere ≤ N*Ip ≤ 180 turns ampere, 700 turns / ampere ≤ N / Ip ≤ 1950 turns / ampere.

7. The electric device according to claim 6, characterized in that, N≤585 turns, Ip≥0.3 amperes.

8. The electric device according to claim 7, characterized in that, N=350 turns, Ip=0.5 amperes.

9. The electric actuator according to any one of claims 1 to 8, characterized in that, The valve assembly (200) includes a valve core (212) and a valve port (220), with a throttling orifice (250) formed between the valve port (220) and the valve core (212). The magnetic rotor (211) can drive the valve core (212) relative to the valve port (220) to adjust the flow area of ​​the throttling orifice (250).

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