Actuator and electronic valve
By detecting the change in magnetic field between the rotor code track and the stator coil, and combining the rotor base plate and magnetic baffle structure, the problem of low position detection accuracy of the actuator is solved, and higher accuracy and stable position detection are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU CHENKONG INTELLIGENT CONTROL TECH CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-08-04
AI Technical Summary
The position sensors of existing actuators are susceptible to magnetic field interference, resulting in low position detection accuracy and affecting the reliability and stability of the actuators.
The position detection of the output shaft is achieved by detecting the change in magnetic field when the rotor code track rotates relative to the stator coil. The rotor base plate and magnetic baffle structure are combined with the induction coil group and the excitation coil group to improve the accuracy of position detection.
This improves the position detection accuracy and stability of the actuator, reduces the impact of external electromagnetic interference, and ensures the reliable operation of the actuator.
Smart Images
Figure CN224592806U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of actuator technology, and in particular to some actuators and electronic valves. Background Technology
[0002] Actuators are an important component of automatic control systems and are widely used in automation, precision machinery, and equipment control systems. Current actuator position sensors typically use Hall effect elements and magnetic rings, which are susceptible to magnetic field interference during operation, making it difficult to guarantee the accuracy of position detection and significantly impacting the reliability and stability of the actuator. Utility Model Content
[0003] This application provides an actuator and an electronic valve that can effectively and reliably detect the position of the rotor track and the output shaft by detecting the change in magnetic field during the relative rotation between the rotor track and the stator coil, thereby improving the detection accuracy and ensuring the stability and reliability of the actuator.
[0004] To address the aforementioned technical problems, this application provides an actuator in a first aspect. The actuator includes:
[0005] case;
[0006] The output shaft is rotatably mounted inside the housing;
[0007] The rotor track is located on the output shaft;
[0008] Stator coils are housed within the casing;
[0009] The drive unit connects to the output shaft and can drive the output shaft to rotate relative to the housing, so that the rotor code track and the stator coil rotate relative to each other. The stator coil is used to detect the position of the rotor code track.
[0010] The rotor code track includes a rotor base plate and at least one magnetic baffle. The rotor base plate is connected to the output shaft, and the at least one magnetic baffle is disposed on the side of the rotor base plate facing the stator coil.
[0011] Wherein, the rotor base plate is annular, and at least one magnetically conductive baffle is uniformly spaced along the circumference of the rotor base plate; and / or,
[0012] At least one magnetically conductive baffle is either semi-circular or fan-shaped.
[0013] The width of the magnetically conductive baffle along its radial direction is greater than the width of the stator coil along its radial direction.
[0014] The stator coil includes an induction coil group and an excitation coil group, with the excitation coil group located on the inner and / or outer side of the induction coil group along the radial direction.
[0015] The induction coil group includes at least two induction coils, and the number of cycles of the at least two induction coils is the same as the number of at least one magnetically conductive baffle.
[0016] The induction coil assembly is either ring-shaped or arc-shaped.
[0017] The rotor code track and the stator coil are each at least one. At least one rotor code track is arranged in a radial ring, and at least one stator coil is arranged in a radial ring. Each stator coil is used to sense the signal of a corresponding rotor code track.
[0018] Each rotor code track includes at least one magnetic baffle, and the number of magnetic baffles in each rotor code track is different.
[0019] Each stator coil includes an induction coil group, and the number of cycles of the induction coil group of each stator coil is the same as the number of magnetic baffles in a corresponding rotor code track.
[0020] Wherein, at least one rotor code track and at least one stator coil are concentrically arranged; and / or,
[0021] There is a gap between two adjacent rotor tracks.
[0022] To address the aforementioned technical problems, this application provides an electronic valve in a second aspect. The electronic valve includes a valve core and an actuator as described above, with the output shaft of the actuator connected to the valve core.
[0023] Unlike existing technologies, this application provides an actuator and electronic valve that detects the position of the output shaft by detecting the change in the magnetic field when the rotor code track rotates relative to the stator coil, thereby improving the accuracy of position detection and ensuring the stability and reliability of the actuator. Attached Figure Description
[0024] Figure 1 This is an exploded view of the structure of one embodiment of the first implementation of the actuator of this application.
[0025] Figure 2 This is a partial structural schematic diagram of one embodiment of the first implementation of the actuator of this application;
[0026] Figure 3 This is a partial structural schematic diagram of another embodiment of the actuator of this application;
[0027] Figure 4 This is a schematic diagram of the rotor code track structure of an embodiment of the second implementation of the actuator of this application;
[0028] Figure 5 This is a schematic diagram of the stator coil structure of an embodiment of the second implementation of the actuator of this application;
[0029] Figure 6 This is a schematic diagram of the rotor code track structure of an embodiment of the third implementation of the actuator of this application;
[0030] Figure 7 This is a schematic diagram of the stator coil structure of an embodiment of the third implementation of the actuator of this application;
[0031] Figure 8 This is a schematic diagram of the stator coil structure of another embodiment of the actuator of this application (third embodiment);
[0032] Figure 9 This is a partial structural schematic diagram of the third embodiment of the actuator of this application; Detailed Implementation
[0033] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0034] Figure 1 , Figure 2 , Figure 3 , Figure 9 A schematic diagram of the actuator structure in the middle, Figure 4 , Figure 6 Schematic diagram of rotor code track structure and Figure 5 , Figure 7 , Figure 8 The stator coil structure diagrams shown are for logical structure illustration only; the specific connection structures are based on the actual production structures. In the following description, specific details such as particular system structures, interfaces, and technologies are presented for illustrative purposes rather than limiting, in order to provide a thorough understanding of this application.
[0035] This application provides an actuator in its first aspect; see [link to relevant documentation]. Figure 1 , Figure 1 This is an exploded view of the structure of one embodiment of the first implementation of the actuator of this application.
[0036] By detecting the position between the rotor code track 110 and the stator coil 120, the angular position of the output shaft 140 is obtained, enabling the actuator 100 to accurately detect the position angle of the output shaft 140. The drive unit transmits power to the output shaft 140, causing the output shaft 140 to rotate and transmit power and control the equipment connected to the actuator 100.
[0037] Please see Figure 2 , Figure 2This is a partial structural schematic diagram of an embodiment of the electronic valve of this application. The actuator 100 includes a housing 130, a rotor code track 110, a stator coil 120, an output shaft 140, and a drive unit 150. The rotor code track 110 and the stator coil 120 are respectively disposed within the housing 130. The output shaft 140 is rotatably disposed within the housing 130 and is connected to both the rotor code track 110 and the drive unit 150. The drive unit 150 can drive the output shaft 140 to rotate relative to the housing 130, causing the rotor code track 110 to rotate relative to the stator coil 120. The position of the rotor code track 110 is detected by the stator coil 120.
[0038] For ease of understanding, Figure 2 The embodiment only includes a portion of the housing 130. In this embodiment, the drive component 150 is illustrated as a rotary motor. It is understood that in some other embodiments, the drive component 150 may also be configured with other structures, such as a rotary cylinder, a hydraulic motor, etc. The specific structure of the drive component 150 is not limited here. The drive component 150 and the output shaft 140 may be directly connected or indirectly connected through a transmission structure such as gears or belts, which is not limited here.
[0039] The output shaft 140 of the actuator 100 can be connected to an external device to drive and control it, such as a water valve. In practical applications, to effectively control the external device, the movement position of the output shaft 140 must be accurately detected.
[0040] Please see Figure 3 , Figure 3 This is a partial structural schematic diagram of another embodiment of the electronic valve in the first embodiment of this application. When the output shaft 140 rotates relative to the housing 130, the output shaft 140 also drives the rotor code track 110 to rotate. The rotor code track 110 connected to the output shaft 140 can directly reflect the rotation state on the output shaft 140. Through the magnetic field change signal generated by the relative motion between the rotor code track 110 and the stator coil 120, non-contact high-precision position detection is achieved, improving the stability of signal acquisition and effectively suppressing external electromagnetic interference.
[0041] Please see Figure 4 , Figure 4 This is a schematic diagram of the rotor code track structure of a second embodiment of the electronic valve of this application. In some embodiments, the rotor code track 110 includes a rotor substrate 111 and at least one magnetic baffle 112. The rotor substrate 111 is connected to the output shaft 140, and the at least one magnetic baffle 112 is disposed on the side of the rotor substrate 111 facing the stator coil 120.
[0042] The rotor substrate 111 is the main structure for supporting the magnetic baffle 112. The rotor substrate 111 passes through the output shaft 140, and the magnetic baffle 112 is disposed on the side of the rotor substrate 111 opposite to the stator coil 120. The rotor substrate 111 can be made of non-magnetic materials such as aluminum alloy, resin or plastic, which generates less eddy current and will not affect the generated magnetic field change signal.
[0043] The magnetic baffle 112 is used to change the magnetic circuit characteristics. The magnetic baffle 112 can be fixed to the surface of the rotor base plate 111 by electroplating, welding, snap-fitting or bonding. The material of the magnetic baffle 112 can be magnetic materials such as ferrite, silicon steel sheet or electromagnet. The surface of the magnetic baffle 112 can be electroplated to enhance wear resistance. Figure 4 The magnetic baffle 112 structure design is only one embodiment of the magnetic baffle 112 being arranged on the rotor substrate 111. In some other embodiments, a single magnetic baffle 112 or multiple magnetic baffles 112 can be arranged in a ring. When the output shaft 140 rotates, the magnetic baffle 112 will periodically change the magnetic circuit characteristics of the stator coil 120, thereby generating a detectable magnetic field change signal.
[0044] Please see Figure 5 , Figure 5 This is a schematic diagram of the stator coil structure according to a second embodiment of the electronic valve of this application. In some embodiments, the stator coil 120 includes an induction coil group 121 and an excitation coil group 122, with the excitation coil group 122 disposed radially inside and / or outside the induction coil group 121. The excitation coil group 122 receives an excitation signal and generates an alternating magnetic field. The induction coil group 121 generates an induced electromotive force signal corresponding to the excitation signal. When the rotor track 110 rotates relative to the stator coil 120, the induction coil group 121 generates a changing induced electromotive force signal. The position information of the output shaft 140 can be calculated based on the changing induced electromotive force signal. The radially inner side of the induction coil group 121 refers to the side of the induction coil group 121 closer to the axis, and the radially outer side of the induction coil group 121 refers to the side of the induction coil group 121 farther from the axis.
[0045] In some embodiments, the stator coil 120 further includes a stator substrate 123, on which the excitation coil group 122 and the induction coil group 121 are respectively disposed. The stator substrate 123 may be a multilayer printed circuit board, and through holes (not shown) are provided on the stator substrate 123. The excitation coil group 122 and the induction coil group 121 are respectively wound on the multilayer printed circuit board through the through holes.
[0046] Please see Figure 6 , Figure 6This is a schematic diagram of the rotor code track structure according to a third embodiment of the electronic valve of this application. In some embodiments, the rotor base plate 111 is annular, and at least one magnetically conductive baffle 112 is uniformly spaced along the circumference of the rotor base plate 111. The annular design of the rotor base plate 111 ensures the symmetry of its structure, guarantees that the mass distribution of the rotor code track 110 is uniform when it rotates, effectively reduces unbalanced torque, and thus improves the stability of the actuator 100.
[0047] In some embodiments, at least one magnetically conductive baffle 112 is either semi-circular or fan-shaped. When there is one magnetically conductive baffle 112, it can be set as semi-circular; when there are at least two magnetically conductive baffles 112, they can be set as fan-shaped, with at least two fan-shaped magnetically conductive baffles 112 evenly spaced circumferentially. In other embodiments, the magnetically conductive baffles 112 can also be arranged in a non-uniform distribution, adjusting the spacing angle and number of the magnetically conductive baffles according to actual needs to optimize the magnetic field distribution and maintain the effective magnetic flux conduction area.
[0048] In some embodiments, the number of rotor tracks 110 can be set to multiple. For example... Figure 6 As shown, the rotor code track 110 is a dual code track. The inner rotor code track 110 is configured with a single magnetic baffle 112, while the outer rotor code track 110 is configured with eight magnetic baffles 112, which can provide different detection accuracies.
[0049] The annular rotor substrate 111, in conjunction with uniformly distributed magnetic baffles 112, makes the magnetic circuit reluctance more uniform, reduces magnetic flux leakage, and improves electromagnetic conversion efficiency. The shape and spacing of the magnetic baffles 112 must match the layout of the stator coils 120 to achieve optimal magnetic coupling. The magnetic baffles 112 can be made of a material with a permeability higher than that of air, and the magnetic circuit characteristics can be optimized by adjusting the thickness or curvature of the baffles.
[0050] Please see Figure 7 , Figure 7 This is a schematic diagram of the stator coil structure according to a third embodiment of the electronic valve of this application. In some embodiments, the induction coil group 121 includes at least two induction coils (not shown), and the number of cycles of the at least two induction coils is the same as the number of at least one magnetic baffle 112. The number of cycles of the induction coil is the number of complete electrical cycles output by the induction coil when the rotor track 110 rotates one revolution.
[0051] In some embodiments, the induction coil group 121 includes two induction coils, which are wired with a 90-degree phase difference. The zero points of the cycles of the two induction coils are the same to generate a complete sine and cosine magnetic field signal, allowing the actuator 100 to calculate the rotation angle of the rotor track 110. In other embodiments, the number of induction coils and the phase difference can be set according to actual needs. For example, four induction coils can be wired with a 90-degree phase difference, three induction coils can be wired with a 120-degree phase difference, and six induction coils can be wired with a 60-degree phase difference. The angle calculation method will also be different under different wiring methods.
[0052] In some embodiments, the number of stator coils 120 can be set to multiple. For example... Figure 7 As shown, stator coil 120 has dual code channels, which can be used in conjunction with... Figure 6 The rotor code track 110 has two code tracks. The inner stator coil 120 has one cycle of induction coil, and the outer stator coil 120 has eight cycles of induction coil.
[0053] In some embodiments, the induction coil group 121 is annular, and the excitation coil group 122 is correspondingly annular. When the number of induction coil groups 121 is N, the number of excitation coil groups 122 can be set to N+1, with one excitation coil group 122 located inside the innermost induction coil group 121, and the remaining excitation coil groups 122 located outside the corresponding induction coil group 121, so that each induction coil group 121 has an excitation coil group 122 on both its inner and outer sides, ensuring the quality of the induced electromotive force signal of the induction coil group 121. Figure 7 The stator coil 120 of the dual-channel circuit is illustrated by an example. There are two induction coil groups 121 and three excitation coil groups 122. One excitation coil group 122 is located inside the inner induction coil group 121, and the other two excitation coil groups 122 are located outside the two induction coil groups 121 respectively, so that excitation coil groups 122 are provided on both the inner and outer sides of the two induction coil groups 121.
[0054] Please see Figure 8 , Figure 8 This is a schematic diagram of the stator coil structure of another embodiment of the electronic valve in the third embodiment of this application. The induction coil group 121 is arc-shaped, and the excitation coil group 122 surrounds the induction coil group 121. In some other embodiments, the excitation coil group 122 may be disposed only inside or outside the induction coil group 121, which is not limited here. The induction coil group 121 is wound with conductive material to form a specific geometric shape, and the shape of the induction coil group 121 can be set according to the rotation range of the output shaft 140, which is not limited here.
[0055] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of the electronic valve according to the third embodiment of this application. In some embodiments, the width of the magnetically conductive baffle 112 along its radial direction is greater than the width of the stator coil 120 along its radial direction. When the width of the magnetically conductive baffle 112 is greater than that of the stator coil 120, the magnetically conductive baffle 112 can completely cover the induction coil group 121 and the excitation coil group 122 along its radial direction, thereby ensuring the detection accuracy of the stator coil 120.
[0056] In some embodiments, the number of rotor code tracks 110 and stator coils 120 is at least one, with at least one rotor code track 110 arranged sequentially around its radial direction, and at least one stator coil 120 arranged sequentially around its radial direction. The number of rotor code tracks 110 and stator coils 120 may be set to be the same, and each stator coil 120 is used to sense the signal of a corresponding rotor code track 110. Each rotor code track 110 includes at least one magnetic baffle 112, and each stator coil 120 includes an induction coil group 121.
[0057] In some embodiments, the number of rotor tracks 110 and stator coils 120 is at least two. The number of magnetic baffles 112 in each rotor track 110 is different, and the number of cycles of the induction coil group 121 in each stator coil 120 is also different. Furthermore, the number of cycles of the induction coil group 121 in each stator coil 120 is the same as the number of magnetic baffles 112 in its corresponding rotor track 110. By setting at least two rotor tracks 110 and stator coils 120, at least two different induced electromotive force signals can be collected, and more accurate position information can be calculated from these at least two different induced electromotive force signals.
[0058] In some embodiments, such as Figure 9 As shown, there are two rotor tracks 110, corresponding to two induction coil groups 121 and three excitation coil groups 122. Each induction coil group 121 and each excitation coil group 122 are spaced apart. The excitation coils of each excitation coil group 122 are interconnected, and the entire excitation coil is drawn to form a continuous conductor.
[0059] In some embodiments, when the rotor code track 110 is provided with one magnetic baffle 112, the corresponding stator coil 120 induction coil group 121 is configured with one cycle, that is, when the rotor code track 110 rotates one revolution, the induction coil group 121 outputs one complete electrical cycle (i.e., electrical angle of 2π). When the rotor code track 110 is provided with N magnetic baffles 112, the corresponding stator coil 120 induction coil group 121 is configured with N cycles, that is, when the rotor code track 110 rotates one revolution, the induction coil group 121 generates N complete electrical cycles (i.e., electrical angle of N*2π).
[0060] In some embodiments, at least one rotor code track 110 and at least one stator coil 120 are concentrically arranged. The induction coil group 121 and the excitation coil group 122 in a stator coil 120 can be arranged radially around the same center. Multiple stator coils 120 can also be arranged radially around the same center, and the corresponding rotor code track 110 can also be arranged radially around the same center, thereby ensuring the detection accuracy of the actuator 100.
[0061] Concentric alignment means that the central axes of the rotor code track 110 and the stator coil 120 are essentially completely aligned, which can be achieved by bearing support or bushing positioning. Concentric alignment ensures the relative position stability between the rotor code track 110 and the stator coil 120, improves signal detection accuracy, and reduces electromagnetic interference.
[0062] In some embodiments, a gap is provided between two adjacent rotor code tracks 110. The gap between adjacent rotor code tracks 110 can be formed by machining to create a physical gap or by filling with a non-magnetic material. The gap between rotor code tracks 110 can effectively avoid signal crosstalk between adjacent rotor code tracks 110, ensuring that the signal of each code track is clear and independent, thereby improving the accuracy of position detection, while also allowing for dimensional changes caused by thermal expansion. This structural combination improves the operational reliability of the actuator 100, extends its service life, and ensures stable operating characteristics under complex working conditions.
[0063] Please refer to the following: Figure 1 and Figure 2 In some embodiments, the actuator 100 further includes a circuit board 170, which is disposed within the actuator 100 housing. The stator coil 120 is disposed on the circuit board 170, and the drive unit 150 is electrically connected to the circuit board 170. The circuit board 170 is provided with a control chip (not shown in the figure). The control chip can decode the magnetic field signal output by the stator coil 120 to obtain the angular position of the output shaft 140, and the control chip can output control signals to the drive unit 150 to control the actuator 100.
[0064] In some embodiments, the actuator 100 further includes a transmission assembly 160, which is connected between the output shaft 140 and the drive member 150. The drive member 150 drives the output shaft 140 to rotate relative to the housing 130 via the transmission assembly 160. The transmission assembly 160 includes multiple transmission gears (not shown in the figure) and can realize torque transmission and speed reduction functions. The output shaft of the drive member 150 is provided with helical teeth, which mesh with one of the transmission gears; an output gear is sleeved on the output shaft 140, which meshes with another transmission gear. In some other embodiments, the transmission assembly 160 may also be configured with other structures, such as belt drive, threaded drive, etc., which are not limited here.
[0065] Unlike existing technologies, this application provides actuators that detect the position of the output shaft by detecting the change in the magnetic field during the relative rotation between the rotor code track and the stator coil, thereby improving the accuracy of position detection and ensuring the stability and reliability of the actuator.
[0066] To address the aforementioned technical problems, this application provides an electronic valve (not shown) in a second aspect. The electronic valve includes a valve core (not shown) and an actuator as described in any of the above embodiments. The output shaft of the actuator is connected to the valve core, and a delivery shaft can drive the valve core to rotate.
[0067] In some embodiments, the output shaft is connected to the valve core via a spline or a limiting member, so that the output shaft and the valve core are circumferentially limited, thereby allowing the output shaft to drive the valve core to rotate.
[0068] In some embodiments, the electronic valve further includes a valve housing (not shown), the actuator housing is connected to the valve housing, the interior of the housing 1 is connected to the interior of the valve housing, the output shaft is connected to the valve core disposed in the valve housing, and the output shaft drives the valve core to rotate to change the opening between the valve core and the valve housing, thereby realizing flow control of the electronic valve.
[0069] Unlike existing technologies, the electronic valve provided in this application can effectively and reliably detect the position of the valve core, thereby improving the accuracy of position detection and ensuring the stability and reliability of the electronic valve.
[0070] In the several embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. Regarding the technical solutions in the embodiments of this application, it is obvious that the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. For example, the device implementation methods described above are merely illustrative. For example, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be electrical, mechanical, or other forms.
[0071] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0072] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "coupled," "connected," "linked," "set up," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0073] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.
[0074] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0075] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. An actuator, characterized in that, The actuator includes: case; The output shaft is rotatably mounted on the housing; The rotor code track is located on the output shaft; Stator coils are disposed in the housing; A drive unit is connected to the output shaft, which can drive the output shaft to rotate relative to the housing, so that the rotor code track rotates relative to the stator coil, and the stator coil is used to detect the position of the rotor code track.
2. The actuator according to claim 1, characterized in that, The rotor code track includes a rotor base plate and at least one magnetic baffle. The rotor base plate is connected to the output shaft, and the at least one magnetic baffle is disposed on the side of the rotor base plate facing the stator coil.
3. The actuator according to claim 2, characterized in that, The rotor substrate is annular, and at least one magnetically conductive baffle is uniformly spaced along the circumference of the rotor substrate; and / or, The at least one magnetically conductive baffle is either semi-circular or fan-shaped.
4. The actuator according to claim 2, characterized in that, The width of the magnetically conductive baffle along its radial direction is greater than the width of the stator coil along its radial direction.
5. The actuator according to claim 2, characterized in that, The stator coil includes an induction coil group and an excitation coil group, wherein the excitation coil group is disposed on the inner and / or outer side of the induction coil group along the radial direction.
6. The actuator according to claim 5, characterized in that, The induction coil group includes at least two induction coils, and the number of cycles of the at least two induction coils is the same as the number of the at least one magnetically conductive baffle.
7. The actuator according to claim 5, characterized in that, The induction coil assembly is circular or arc-shaped.
8. The actuator according to any one of claims 1-7, characterized in that, The number of rotor code tracks and the number of stator coils are each at least one. At least one rotor code track is arranged in a radial circle, and at least one stator coil is arranged in a radial circle. Each stator coil is used to sense the signal of a corresponding rotor code track.
9. The actuator according to claim 8, characterized in that, Each of the rotor tracks includes at least one magnetic baffle, and the number of magnetic baffles in each rotor track is different; Each of the stator coils includes an induction coil group, and the number of cycles of the induction coil group of each stator coil is the same as the number of magnetic baffles of a corresponding rotor track.
10. The actuator according to claim 8, characterized in that, At least one of the rotor code tracks and at least one of the stator coils are concentrically arranged; and / or, A gap is provided between two adjacent rotor tracks.
11. An electronic valve, characterized in that, include: Valve core; The actuator as claimed in any one of claims 1-10, wherein the output shaft of the actuator is connected to the valve core.