A magnetoelectric encoder assembly and motor

Abstract

The application discloses a magneto-electric encoder assembly and a motor. The magneto-electric encoder assembly comprises a stator assembly including a first magnetic sensitive element and a second magnetic sensitive element; and a rotor assembly arranged on a motor rotating shaft, the rotor assembly including a first magnetic steel code disc and a second magnetic steel code disc, the first magnetic steel code disc being arranged in correspondence with the first magnetic sensitive element in the axial direction or the radial direction of the motor rotating shaft, and the second magnetic steel code disc being arranged in correspondence with the second magnetic sensitive element in the axial direction or the radial direction of the motor rotating shaft; when the motor rotating shaft drives the rotor assembly to rotate, the first magnetic steel code disc rotates synchronously to generate a first magnetic field, and the second magnetic steel code disc rotates synchronously to generate a second magnetic field; the first magnetic sensitive element senses the first magnetic field and generates a first electric signal, and the second magnetic sensitive element senses the second magnetic field and generates a second electric signal; and the stator assembly is used for obtaining the speed and position of the motor rotating shaft based on the first electric signal and the second electric signal. In the above manner, the failure redundancy of the magneto-electric encoder assembly is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a magnetoelectric encoder assembly and a motor. Background Technology

[0002] In existing magneto-electric encoders, typically only one or two magnetic code disks are fixed to the end of the motor shaft, and Hall sensors, magnetoresistive chips, or magnetic sensitive elements are correspondingly set to sense changes in the magnetic field. In the structure of a single magnetic sensitive element magneto-electric encoder, if one of the magnetic code disks or magnetic sensitive elements is damaged, the entire magneto-electric encoder will stop working, resulting in low fault redundancy capability. Utility Model Content

[0003] This application mainly provides a magnetoelectric encoder assembly and motor to solve the problem of low fault redundancy capability of magnetoelectric encoders.

[0004] This application provides a magnetoelectric encoder assembly, including:

[0005] The stator assembly includes a first magnetic sensitive element and a second magnetic sensitive element;

[0006] A rotor assembly is mounted on a motor shaft. The rotor assembly includes a first magnetic code disk and a second magnetic code disk. The first magnetic code disk and the first magnetic sensitive element are correspondingly arranged in the axial or radial direction of the motor shaft, and the second magnetic code disk and the second magnetic sensitive element are correspondingly arranged in the axial or radial direction of the motor shaft.

[0007] When the motor shaft drives the rotor assembly to rotate, the first magnetic code disk rotates synchronously to generate a first magnetic field, and the second magnetic code disk rotates synchronously to generate a second magnetic field. The first magnetic sensitive element senses the first magnetic field and generates a first electrical signal, and the second magnetic sensitive element senses the second magnetic field and generates a second electrical signal. The stator assembly is used to obtain the speed and position of the motor shaft based on the first electrical signal and the second electrical signal.

[0008] In some embodiments, the first magnetic sensitive element and the first magnetic code disk are disposed on one side of the stator assembly, and the second magnetic sensitive element and the second magnetic code disk are disposed on the side of the stator assembly away from the first magnetic sensitive element.

[0009] In some embodiments, the stator assembly further includes a first circuit board and a second circuit board, the first circuit board and the second circuit board being spaced apart, the first magnetic sensitive element and the first magnetic code disk being disposed on the side of the first circuit board away from the second circuit board; the second magnetic sensitive element and the second magnetic code disk being disposed on the side of the second circuit board away from the first circuit board.

[0010] In some embodiments, the stator assembly further includes a first circuit board and a second circuit board. The first circuit board is disposed on one side of the rotor assembly, and the first magnetic sensitive element is disposed on the side of the first circuit board close to the rotor assembly, so that the first magnetic sensitive element is correspondingly disposed with the first magnetic code disk. The second circuit is disposed on the side of the rotor assembly away from the first circuit board, and the second magnetic sensitive element is disposed on the side of the second circuit board close to the rotor assembly, so that the second magnetic sensitive element is correspondingly disposed with the second magnetic code disk.

[0011] In some embodiments, a sensing gap is provided between the first magnetic sensitive element and the first magnetic code disk, and the sensing gap is provided between the second magnetic sensitive element and the second magnetic code disk.

[0012] In some embodiments, the motor shaft includes a first shaft and a second shaft. The first magnetic encoder is disposed on the first shaft, and the first shaft passes through the stator assembly, such that the first magnetic encoder and the first magnetic sensitive element are correspondingly disposed in the axial or radial direction of the first shaft. The second magnetic encoder is disposed on the second shaft, and the second shaft passes through the stator assembly, such that the second magnetic encoder and the second magnetic sensitive element are correspondingly disposed in the axial or radial direction of the second shaft. The rotational speed of the first shaft is different from that of the second shaft.

[0013] In some embodiments, the first magnetic code disk includes m N poles and m S poles, the m N poles and m S poles are alternately arranged and arranged in a circular shape, and the first rotating shaft is located at the center of the first magnetic code disk.

[0014] In some embodiments, the second magnetic code disk includes n N poles and n S poles, the n N poles and the n S poles are alternately arranged and arranged in a circular shape, and the second rotating shaft is located at the center of the second magnetic code disk.

[0015] In some embodiments, m and n are both coprime integers.

[0016] This application also provides an electric motor that includes the magnetoelectric encoder assembly described above.

[0017] The beneficial effects of this application are as follows: In this application, the first magnetic code disk of the rotor assembly and the first magnetic sensitive element of the stator assembly are correspondingly arranged in the axial or radial direction of the motor shaft, and the second magnetic code disk of the rotor assembly and the second magnetic sensitive element of the stator assembly are correspondingly arranged in the axial or radial direction of the motor shaft. When the motor shaft drives the rotor assembly to rotate, the first magnetic code disk rotates synchronously to generate a first magnetic field, and the second magnetic code disk rotates synchronously to generate a second magnetic field. The first magnetic sensitive element senses the first magnetic field and generates a first electrical signal, and the second magnetic sensitive element senses the second magnetic field and generates a second electrical signal. The stator assembly is used to obtain the speed and position of the motor shaft based on the first and second electrical signals. This application, by correspondingly arranging the first magnetic code disk and the first magnetic sensitive element, and correspondingly arranging the second magnetic code disk and the second magnetic sensitive element, respectively forms an independent detection channel, forming a redundant design. If one magnetic code disk or one magnetic sensitive element fails, the other magnetic code disk and magnetic sensitive element can continue to work, improving the fault redundancy capability of the magneto-electric encoder assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is an exploded view of an embodiment of the magnetoelectric encoder assembly provided in this application;

[0020] Figure 2 This is a side view schematic diagram of an embodiment of the magnetoelectric encoder assembly provided in this application;

[0021] Figure 3 This is a side view schematic diagram of another embodiment of the magnetoelectric encoder assembly provided in this application;

[0022] Figure 4 This is a side view schematic diagram of another embodiment of the magnetoelectric encoder assembly provided in this application. Detailed Implementation

[0023] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] Please see Figure 1 As shown, Figure 1 This is an exploded view of an embodiment of the magnetoelectric encoder assembly provided in this application. The magnetoelectric encoder assembly 100 of this embodiment includes a stator assembly 10 and a rotor assembly 20.

[0028] The stator assembly 10 includes a first magnetic sensitive element 11 and a second magnetic sensitive element 12.

[0029] Stator assembly 10 refers to the component in a magneto-electric encoder that does not rotate with the motor shaft. The magnetic sensing element is used to sense the magnetic field generated by the magnet code disk in rotor assembly 20 and convert it into an electrical signal.

[0030] In some embodiments, the stator assembly 10 is also called a stator circuit board, and the first magnetic sensitive element 11 and the second magnetic sensitive element 12 are soldered or pasted onto the stator assembly 10.

[0031] The rotor assembly 20 is mounted on the motor shaft (not shown). The rotor assembly 20 includes a first magnetic encoder 21 and a second magnetic encoder 22. The first magnetic encoder 21 and the first magnetic sensitive element 11 are correspondingly arranged in the axial or radial direction of the motor shaft, and the second magnetic encoder 22 and the second magnetic sensitive element 12 are correspondingly arranged in the axial or radial direction of the motor shaft.

[0032] A magnetic code disk is a disc made of permanent magnet material with a magnetic pole pattern arranged in a certain pattern. It is used in conjunction with magnetic sensitive elements, Hall sensors or magnetoresistive chips to realize the speed detection of motor shaft.

[0033] In some embodiments, the first magnetic code disk 21 is a high-precision code disk, and the second magnetic code disk 22 is a low-precision code disk; and the cross-sectional shape of the first magnetic code disk 21 and the second magnetic code disk 22 are both circular, and the first magnetic code disk 21 and the second magnetic code disk 22 are concentrically arranged.

[0034] like Figure 1 As shown, the first magnetic code disk 21 is an outer ring, and the second magnetic code disk 22 is an inner ring, and the first magnetic code disk 21 and the second magnetic code disk 22 are concentrically arranged; the first magnetic code disk 21 of the stator assembly 10 and the rotor assembly 20 are correspondingly arranged, and the cross-sectional shape of the stator assembly 10 is annular; the motor shaft is located at the center of the first magnetic code disk 21 and the second magnetic code disk 22.

[0035] In some embodiments, a first magnetic code disk 21 and a second magnetic code disk 22, which are concentrically arranged, are fixed on one end of the motor shaft. The first magnetic code disk 21 and the second magnetic code disk 22 rotate synchronously with the motor shaft and generate corresponding magnetic field changes respectively. At the same time, the motor shaft is also inserted through the stator assembly 10 so that the first magnetic code disk 21 and the first magnetic sensitive element 11 are correspondingly arranged in the axial or radial direction of the motor shaft, and the second magnetic code disk 22 and the second magnetic sensitive element 12 are correspondingly arranged in the axial or radial direction of the motor shaft.

[0036] When the motor shaft drives the rotor assembly 20 to rotate, the first magnetic code disk 21 rotates synchronously to generate a first magnetic field, and the second magnetic code disk 22 rotates synchronously to generate a second magnetic field. The first magnetic sensitive element 11 senses the first magnetic field and generates a first electrical signal, and the second magnetic sensitive element 12 senses the second magnetic field and generates a second electrical signal. The stator assembly 10 is used to obtain the speed and position of the motor shaft based on the first and second electrical signals.

[0037] In some embodiments, when the motor shaft rotates, the rotor assembly 20 fixed on the motor shaft rotates synchronously; after the first magnetic code disk 21 rotates synchronously, it forms a first magnetic field that varies with the angle around it, and the second magnetic code disk 22 also forms a second magnetic field that is independent of the first magnetic field and changes synchronously at the same time; in the stationary stator assembly 10, the first magnetic sensitive element 11, which is provided corresponding to the first magnetic code disk 21, detects the first magnetic field in real time and converts it into a first electrical signal, such as a sine wave or pulse sequence; the second magnetic sensitive element 12, which is provided corresponding to the second magnetic code disk 22, detects the second magnetic field and outputs a second electrical signal; the circuit or processor in the stator assembly 10 performs interpolation, phase comparison, error verification and other operations on the first and second electrical signals to obtain the current angular position and instantaneous speed of the motor shaft; that is, the stator assembly 10 can obtain the speed and position of the motor shaft based on the first and second electrical signals.

[0038] Optionally, the first magnetic sensing element 11 and the second magnetic sensing element 12 of the stator assembly 10 are powered and processed separately. When the first magnetic sensing element 11 and the second magnetic sensing element 12 are disposed on the same circuit board, such as... Figure 1 As shown, redundancy of functions can also be achieved.

[0039] In this embodiment, the first magnetic code disk 21 is correspondingly set with the first magnetic sensitive element 11, and the second magnetic code disk 22 is correspondingly set with the second magnetic sensitive element 12, forming an independent detection channel and a redundant design. When one of the magnetic code disks or one of the magnetic sensitive elements is damaged, the other magnetic code disk and magnetic sensitive element can continue to work, thus improving the fault redundancy capability of the magneto-electric encoder assembly 100.

[0040] According to some embodiments of this application, see Figure 2 As shown, Figure 2 This is a side view schematic diagram of an embodiment of the magnetoelectric encoder assembly provided in this application. In this embodiment, the first magnetic sensitive element 11 and the first magnetic code disk 21 are disposed on one side of the stator assembly 10, and the second magnetic sensitive element 12 and the second magnetic code disk 22 are disposed on the side of the stator assembly 10 away from the first magnetic sensitive element 11.

[0041] like Figure 2 As shown, the first magnetic sensitive element 11 is welded or pasted on one side surface of the stator assembly 10, and the first magnetic code disk 21 is disposed on one side of the stator assembly 10; the second magnetic sensitive element 12 is welded or pasted on the side surface of the stator assembly 10 away from the first magnetic sensitive element 11, and the second magnetic code disk 22 is disposed on the other side of the stator assembly 10.

[0042] In this embodiment, by placing the first magnetic sensitive element 11 and the first magnetic code disk 21 on one side of the stator assembly 10, and placing the second magnetic sensitive element 12 and the second magnetic code disk 22 on the other side of the stator assembly 10, two sets of magnetic detection channels that are completely separated in the axial or radial direction are formed. This eliminates magnetic coupling crosstalk and makes the stator assembly 10 a common support, forming an integrated, symmetrical, and compact package. While maintaining dual-channel redundant detection, the radial dimension is not increased, and the outer diameter of the magnetoelectric encoder assembly 100 is significantly reduced, achieving miniaturization and weight reduction.

[0043] According to some embodiments of this application, see Figure 3 As shown, Figure 3This is a side view schematic diagram of another embodiment of the magnetoelectric encoder assembly provided in this application; the stator assembly 10 of this embodiment also includes a first circuit board 110 and a second circuit board 120, the first circuit board 110 and the second circuit board 120 are spaced apart, the first magnetic sensitive element 11 and the first magnetic code disk 21 are disposed on the side of the first circuit board 110 away from the second circuit board 120; the second magnetic sensitive element 12 and the second magnetic code disk 22 are disposed on the side of the second circuit board 120 away from the first circuit board 110.

[0044] like Figure 3 As shown, the first magnetic sensitive element 11 is soldered or pasted on the surface of the first circuit board 110 away from the second circuit board 120, and the first magnetic code disk 21 is disposed on the side of the first circuit board 110 away from the second circuit board 120; the second magnetic sensitive element 12 is soldered or pasted on the surface of the second circuit board 120 away from the first circuit board 110, and the second magnetic code disk 22 is disposed on the side of the second circuit board 120 away from the first circuit board 110.

[0045] According to some embodiments of this application, see Figure 4 As shown, Figure 4 This is a side view schematic diagram of another embodiment of the magnetoelectric encoder assembly provided in this application; the stator assembly 10 of this embodiment includes a first circuit board 110 and a second circuit board 120. The first circuit board 110 is disposed on one side of the rotor assembly 20, and the first magnetic sensitive element 11 is disposed on the side of the first circuit board 110 close to the rotor assembly 20, so that the first magnetic sensitive element 11 is correspondingly disposed with the first magnetic code disk 21; the second circuit board 120 is disposed on the side of the rotor assembly 20 away from the first circuit board 110, and the second magnetic sensitive element 12 is disposed on the side of the second circuit board 120 close to the rotor assembly 20, so that the second magnetic sensitive element 12 is correspondingly disposed with the second magnetic code disk 22.

[0046] like Figure 4 As shown, the first magnetic code disk 21 and the second magnetic code disk 22 are concentrically arranged. The first magnetic code disk 21 is correspondingly arranged with the first magnetic sensitive element 11 on the first circuit board 110, and the second magnetic code disk 22 is correspondingly arranged with the second magnetic sensitive element 12 on the second circuit board 120.

[0047] According to some embodiments of this application, see Figures 2-4 As shown, in this embodiment, a sensing gap is provided between the first magnetic sensitive element 11 and the first magnetic code disk 21, and a sensing gap is provided between the second magnetic sensitive element 12 and the second magnetic code disk 22.

[0048] The sensing gap refers to the physical spatial distance between the magnetic code disk and the magnetic sensitive element, which is used by the magnetic sensitive element to effectively sense changes in the magnetic field of the magnetic head.

[0049] In this embodiment, by setting the sensing gap, the first magnetic code disk 21 and the second magnetic code disk 22 are driven to rotate when the motor shaft rotates. The first magnetic sensitive element 11 can sense the change in the magnetic field of the first magnetic code disk 21, thereby generating an effective first electrical signal; and the second magnetic sensitive element 12 can sense the change in the magnetic field of the second magnetic code disk 22, thereby generating an effective second electrical signal.

[0050] According to some embodiments of this application, the motor shaft includes a first shaft and a second shaft. A first magnetic encoder 21 is disposed on the first shaft, and the first shaft passes through the stator assembly 10, so that the first magnetic encoder 21 and the first magnetic sensitive element 11 are correspondingly disposed on the first shaft in the axial or radial direction. A second magnetic encoder 22 is disposed on the second shaft, and the second shaft passes through the stator assembly 10, so that the second magnetic encoder 22 and the second magnetic sensitive element 12 are correspondingly disposed on the second shaft in the axial or radial direction. The rotational speed of the first shaft is different from that of the second shaft.

[0051] like Figure 2 As shown, the first rotating shaft can be inserted through the first magnetic code disk 21 and the stator assembly 10, and the second rotating shaft can be inserted through the second magnetic code disk 22 and the stator assembly 10.

[0052] like Figure 3 As shown, the first rotating shaft can be inserted through the first magnetic code disk 21 and the first circuit board 110, and the second rotating shaft can be inserted through the second magnetic code disk 22 and the second circuit board 120.

[0053] In some embodiments, when the first magnetic encoder 21 and the second magnetic encoder 22 are respectively installed on two first and second rotating shafts with different rotation speeds, the speed and position of the first and second rotating shafts can be determined simultaneously. When there is a fixed ratio between the rotation speed of the first and second rotating shafts, the first and second rotating shafts are equivalent to the input and output shafts of the reducer. After multiplying by the fixed ratio between the rotation speed of the first and second rotating shafts, the number of poles of the first magnetic encoder 21 and the number of poles of the second magnetic encoder 22 have no common divisor.

[0054] For example, the motor is connected to the reducer, that is, the motor has a reducer. The first magnetic code disk 21 and the second magnetic code disk 22 are respectively installed on the input shaft and output shaft of the reducer, which can simultaneously detect the speed and position information of the input shaft of the reducer, as well as the speed and position information of the output shaft of the reducer.

[0055] Compared to the existing technology where each shaft has two encoders, this embodiment can identify the position and speed of two motor shafts with different speeds by setting up a first shaft and a second shaft, saving a magneto-electric encoder assembly 100.

[0056] Optionally, although the first magnetic sensitive element 11 and the second magnetic sensitive element 12, the first magnetic code disk 21 and the second magnetic code disk 22 can be separated, it is still necessary to combine the first magnetic sensitive element 11, the second magnetic sensitive element 12, the first magnetic code disk 21 and the second magnetic code disk 22 together in order to determine the absolute position of the rotor assembly 20 in a single revolution.

[0057] According to some embodiments of this application, the first magnetic code disk 21 includes m N poles and m S poles, which are alternately arranged and arranged in a circular shape, and the first rotating shaft is located at the center of the first magnetic code disk 21.

[0058] Where m is an integer greater than 1. For example Figure 1 As shown, for example, the first magnetic code disk 21 includes 4 N poles and 4 S poles, also known as the first magnetic code disk 21 having 4 pole pairs, wherein the 4 N poles and 4 S poles are alternately arranged and arranged in a circular shape, and the first rotating shaft is located at the center of the first magnetic code disk 21.

[0059] According to some embodiments of this application, the second magnetic code disk 22 includes n N poles and n S poles, which are alternately arranged and arranged in a circular shape, and the second rotating shaft is located at the center of the second magnetic code disk 22.

[0060] Where n is an integer greater than 1, and n is not equal to m. For example Figure 1 As shown, for example, the second magnetic code disk 22 includes 3 N poles and 3 S poles, also known as the second magnetic code disk 22 having 3 pole pairs, wherein the 3 N poles and 3 S poles are alternately arranged and arranged in a circular shape, and the second rotating shaft is located at the center of the second magnetic code disk 22.

[0061] According to some embodiments of this application, m and n are both coprime integers.

[0062] In this embodiment, m and n are both integers greater than 1, and m is greater than n; furthermore, m and n are coprime. For example, m is 64, n is 63, and m and n are coprime.

[0063] Since the number of pole pairs of the first magnet code disk 21 and the second magnet code disk 22 can be greatly increased, the resolution of the magneto-electric encoder assembly 100 can be increased proportionally to the number of pole pairs, thereby greatly improving the resolution and accuracy of the magneto-electric encoder assembly 100.

[0064] Another embodiment of this application provides a motor including the magnetoelectric encoder assembly 100 of the above embodiment.

[0065] In some embodiments, the motor is connected to the reducer, that is, the motor has a reducer. The first magnetic code disk 21 and the second magnetic code disk 22 are respectively installed on the input shaft and the output shaft of the reducer to simultaneously detect the speed and position information of the input shaft of the reducer, as well as the speed and position information of the output shaft of the reducer.

[0066] In summary, this application establishes an independent detection channel by correspondingly setting the first magnetic code disk 21 with the first magnetic sensitive element 11 and the second magnetic code disk 22 with the second magnetic sensitive element 12, thus forming a redundant design. This design allows the other magnetic code disk and magnetic sensitive element to continue working when one of the magnetic code disks or one of the magnetic sensitive elements fails, thereby improving the fault redundancy capability of the magneto-electric encoder assembly 100.

[0067] 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. A magnetoelectric encoder assembly, characterized in that, include: The stator assembly includes a first magnetic sensitive element and a second magnetic sensitive element; A rotor assembly is mounted on a motor shaft. The rotor assembly includes a first magnetic code disk and a second magnetic code disk. The first magnetic code disk and the first magnetic sensitive element are correspondingly arranged in the axial or radial direction of the motor shaft, and the second magnetic code disk and the second magnetic sensitive element are correspondingly arranged in the axial or radial direction of the motor shaft. When the motor shaft drives the rotor assembly to rotate, the first magnetic code disk rotates synchronously to generate a first magnetic field, and the second magnetic code disk rotates synchronously to generate a second magnetic field. The first magnetic sensitive element senses the first magnetic field and generates a first electrical signal, and the second magnetic sensitive element senses the second magnetic field and generates a second electrical signal. The stator assembly is used to obtain the speed and position of the motor shaft based on the first electrical signal and the second electrical signal.

2. The magnetoelectric encoder assembly according to claim 1, characterized in that, The first magnetic sensitive element and the first magnetic code disk are disposed on one side of the stator assembly, and the second magnetic sensitive element and the second magnetic code disk are disposed on the side of the stator assembly away from the first magnetic sensitive element.

3. The magnetoelectric encoder assembly according to claim 1, characterized in that, The stator assembly further includes a first circuit board and a second circuit board, the first circuit board and the second circuit board being spaced apart, the first magnetic sensitive element and the first magnetic code disk being disposed on the side of the first circuit board away from the second circuit board; the second magnetic sensitive element and the second magnetic code disk being disposed on the side of the second circuit board away from the first circuit board.

4. The magnetoelectric encoder assembly according to claim 1, characterized in that, The stator assembly further includes a first circuit board and a second circuit board. The first circuit board is disposed on one side of the rotor assembly, and the first magnetic sensitive element is disposed on the side of the first circuit board close to the rotor assembly, so that the first magnetic sensitive element is correspondingly disposed with the first magnetic code disk. The second circuit board is disposed on the side of the rotor assembly away from the first circuit board, and the second magnetic sensitive element is disposed on the side of the second circuit board close to the rotor assembly, so that the second magnetic sensitive element is correspondingly disposed with the second magnetic code disk.

5. The magnetoelectric encoder assembly according to any one of claims 1-4, characterized in that, A sensing gap is provided between the first magnetic sensitive element and the first magnetic code disk, and the sensing gap is provided between the second magnetic sensitive element and the second magnetic code disk.

6. The magnetoelectric encoder assembly according to claim 5, characterized in that, The motor shaft includes a first shaft and a second shaft. A first magnetic code disk is disposed on the first shaft, and the first shaft passes through the stator assembly, so that the first magnetic code disk and the first magnetic sensitive element are correspondingly disposed in the axial or radial direction of the first shaft. A second magnetic code disk is disposed on the second shaft, and the second shaft passes through the stator assembly, so that the second magnetic code disk and the second magnetic sensitive element are correspondingly disposed in the axial or radial direction of the second shaft. The rotational speed of the first shaft is different from that of the second shaft.

7. The magnetoelectric encoder assembly according to claim 6, characterized in that, The first magnetic code disk includes m N poles and m S poles, which are alternately arranged and arranged in a circular shape. The first rotating shaft is located at the center of the first magnetic code disk.

8. The magnetoelectric encoder assembly according to claim 7, characterized in that, The second magnetic code disk includes n N poles and n S poles, which are alternately arranged and arranged in a circular shape, and the second rotating shaft is located at the center of the second magnetic code disk.

9. The magnetoelectric encoder assembly according to claim 8, characterized in that, Both m and n are coprime integers.

10. An electric motor, characterized in that, The motor includes a magnetoelectric encoder assembly as described in any one of claims 1-9.

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