Reluctance type rotary transformer, rotor module thereof and sensor
By designing a rotor punching set structure with staggered rotation, the problem of dimensional consistency of the rotor convex pole of the magnetoresistive rotor transformer is solved, and the regularity and accuracy of the output signal are improved.
Patent Information
- Application Number
- CN202421937115.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The rotor convex dimension consistency of the magnetoresistive rotary transformer is not very consistent, resulting in large differences in periodicity of the output signal.
A rotor module is designed in which multiple sets of rotor punching sets are superimposed on each other in the axial direction of the rotor punching sets, and in each adjacent two sets, the rotor punching sets are rotated at a preset angle, thereby forming a spiral torsional or segmented skewed structure.
Through this structural design, the size of the convex electrode structure can be averaged, the error caused by mold size deviation can be reduced, and the accuracy of the rotor module and the regularity of the output signal can be improved.
Smart Images
Figure CN222952902U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensors, in particular to a high-precision multi-pole reluctance type rotary transformer and a rotor module thereof and a sensor. Background Art
[0002] Nowadays, the application of reluctance rotary transformers has expanded from the military industry to civilian electromechanical systems, such as machine tools, new energy vehicles, etc. Reluctance rotary transformers are particularly suitable for accurate measurement of angles and angular velocities in extremely harsh environments due to their simple structure and reliability.
[0003] The rotor of the reluctance rotary transformer is a salient pole structure, and the number of salient poles is generally 2, 3, 4, 5, etc. The number of salient poles is equal to the number of pole pairs, that is, the number of cycles of the output signal when the rotor rotates mechanically 360°. When the outer arc shape of the rotor of the reluctance rotary transformer is a sinusoidal wave, the electromagnetic air gap of the stator and rotor of the reluctance rotary transformer changes in a sinusoidal wave pattern; however, due to the existence of design errors and processing and manufacturing errors, the periodic consistency accuracy of the rotor salient pole size is not high, which further leads to large differences in the output signal of each cycle of the reluctance rotary transformer.
[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content
[0005] In order to solve the above technical problems, the utility model proposes a reluctance rotary transformer and a rotor module thereof and a sensor, so that the output signal of the reluctance rotary transformer has good regularity, small electrical error and high precision.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] In the first aspect, the utility model discloses a rotor module, comprising multiple groups of rotor punching groups; each group of the rotor punching groups includes one rotor punching or multiple rotor punchings overlapped and stacked with each other, an axial hole is respectively opened at the center of each rotor punching, and multiple salient pole structures are respectively provided at the outer circumference of each rotor punching; each group of the rotor punching groups is overlapped with each other along the axial direction of the rotor punching; in each two adjacent groups of the rotor punching groups, the rotor punching group located in the second direction is rotated in the same direction around the axis of the rotor punching by a preset angle compared with the rotor punching group located in the first direction, and the first direction and the second direction are two opposite directions in the axial direction of the rotor punching.
[0008] Preferably, in each of two adjacent groups of the rotor punching groups, the rotor punching groups located in the second direction are staggered by a preset angle in clockwise rotation around the axis of the rotor punching groups compared to the rotor punching groups located in the first direction; or,
[0009] In each of two adjacent groups of the rotor punching groups, the rotor punching groups located in the second direction are staggered by a preset angle in counterclockwise rotation around the axis of the rotor punching groups compared to the rotor punching groups located in the first direction.
[0010] Preferably, the number of the rotor punchings contained in each group of the rotor punching groups is the same.
[0011] Preferably, each group of the rotor punching sheet groups has the same thickness.
[0012] Preferably, the number of rotor punching groups is greater than or equal to 2.
[0013] Preferably, the preset angle is α, and α=θ / k, wherein k is the number of rotor punching sets, and θ is the rotational offset angle of the rotor modules.
[0014] Preferably, the staggered rotation angle θ of the rotor modules is: Wherein, n is an adjustment parameter and is a positive integer, Z is the number of teeth of the stator module corresponding to the rotor module, and b is taken using the following formula:
[0015]
[0016] Wherein, P is the number of salient pole structures in each of the rotor punchings, and a and b are irreducible fractions.
[0017] Preferably, the value range of θ is 5° to 20°, wherein the adjustment parameter n is determined according to the value range of θ.
[0018] In a second aspect, the utility model discloses a reluctance rotary transformer, comprising a winding module, a stator module and the rotor module described in the first aspect.
[0019] In a third aspect, the utility model discloses a sensor, comprising the reluctance rotary transformer described in the second aspect.
[0020] Compared with the prior art, the beneficial effects of the utility model are: the utility model proposes a reluctance type rotary transformer, its rotor module and a sensor, wherein each group of rotor punching groups including a rotor punching sheet or a plurality of rotor punching sheets overlapped and stacked on each other are rotated and staggered by a preset angle compared with adjacent rotor punching sheets, and each group of rotor punching sheets in the overall rotor module are rotated and staggered in the same direction, which can average the size of the salient pole structure, solve the error caused by the uniform stacking of the mold size deviation, weaken the influence of the size error of the salient pole structure, thereby reducing the error caused by the size consistency of the salient pole structure of the rotor module, improving the rotor size accuracy of the reluctance type rotary transformer, and improving the output signal accuracy of the reluctance type rotary transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of the rotor module disclosed in the first embodiment of the present utility model;
[0022] Figure 2 It is a structural schematic diagram of the rotor module disclosed in the fourth embodiment of the present utility model. DETAILED DESCRIPTION
[0023] The following is a detailed description of the implementation of the utility model. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the utility model.
[0024] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit / signal communication.
[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0027] like Figure 1 As shown, the first embodiment of the present invention discloses a rotor module 10, including a plurality of rotor punchings 11, each of which has an axial hole 111 at its center, and a plurality of salient pole structures 112 at its outer circumference.
[0028] Each rotor punching 11 is superimposed on each other along its own axial direction. In each adjacent two rotor punchings 11, the rotor punching 11 located in the second direction is rotated in the same direction around the axis of the rotor punching by a first preset angle compared to the rotor punching 11 located in the first direction. The first direction and the second direction are two opposite directions in the axial direction of the rotor punching. Among them, rotating in the same direction around the axis of the rotor punching refers to rotating clockwise or counterclockwise around the axis of the rotor punching. That is, it can be understood that among all the rotor punchings 11 in the rotor module 10, from the first direction to the second direction in the axial direction, each rotor punching 11 is respectively staggered by a first preset angle clockwise around the axis of the rotor punching 11 than the previous rotor punching, or each rotor punching 11 is respectively staggered by a first preset angle counterclockwise around the axis of the rotor punching 11 than the previous rotor punching.
[0029] The number of rotor sheets 11 included in the rotor module 10 is greater than 2. The rotor sheets 11 are made of soft magnetic material, and each rotor sheet is an annular structure composed of a plurality of salient pole structures 112 .
[0030] The first preset angle is α1, and α1=θ1 / k1, wherein k1 is the number of rotor punchings 11 included in the rotor module 10, and θ1 is the rotational offset angle of the rotor module 10.
[0031] The angle θ1 of the rotor module 10 is: Wherein, n1 is a regulating parameter, and n1 is a positive integer, Z1 is the number of teeth of the stator module corresponding to the rotor module 10, and b1 is taken using the following formula:
[0032]
[0033] Wherein, q1 is the number of slots per pole per phase, P1 is the number of salient pole structures in each rotor punching 11 (ie, the number of pole pairs of the rotor module 10), and a1 and b1 are irreducible fractions.
[0034] The value range of θ1 is 5° to 20°, and the adjustment parameter n1 is determined according to the value range of θ1.
[0035] The second embodiment of the utility model discloses a reluctance type rotary transformer, comprising a winding module, a stator module and the rotor module in the first embodiment.
[0036] The third embodiment of the utility model discloses a sensor, including the reluctance rotary transformer in the second embodiment.
[0037] like Figure 2 As shown, embodiment 4 of the utility model discloses a rotor module 20, which includes multiple groups of rotor punching groups 21. Each group of rotor punching groups 21 includes multiple rotor punchings that overlap and stack with each other. An axial hole 211 is respectively opened at the center of each rotor punching, and multiple salient pole structures 212 are respectively provided on the outer circumference of each rotor punching.
[0038] Each group of rotor sheet groups 21 is superimposed on each other along the axial direction of the rotor sheet; in each adjacent group of rotor sheet groups 21, the rotor sheet group 21 located in the second direction rotates in the same direction around the axis of the rotor sheet compared to the rotor sheet group 21 located in the first direction, and the first direction and the second direction are two relative directions in the axial direction of the rotor sheet. Among them, rotating in the same direction around the axis of the rotor sheet refers to rotating clockwise or counterclockwise around the axis of the rotor sheet. That is, it can be understood that in all rotor sheet groups 21 in the rotor module 20, from the first direction to the second direction in the axial direction, each group of rotor sheet groups 21 is respectively staggered by a second preset angle clockwise around the axis of the rotor sheet than the previous group of rotor sheet groups 21, or each group of rotor sheet groups 21 is respectively staggered by a second preset angle counterclockwise around the axis of the rotor sheet than the previous group of rotor sheet groups 21.
[0039] The number of rotor punchings included in each set of rotor punching groups 21 is the same; and the thickness of each set of rotor punching groups 21 is the same. The number of rotor punching groups 21 included in the rotor module is greater than or equal to 2. The rotor punching is made of soft magnetic material, and each rotor punching is an annular structure composed of multiple salient pole structures 212.
[0040] The second preset angle is α2, and α2=θ2 / k2, wherein k1 is the number of rotor punching sets 21 included in the rotor module 20, and θ2 is the rotational offset angle of the rotor module 20.
[0041] The angle θ2 of the rotor module 20 is: Wherein, n2 is an adjustment parameter, and n2 is a positive integer, Z2 is the number of teeth of the stator module corresponding to the rotor module 20, and b2 is taken using the following formula:
[0042]
[0043] In the formula, q2 is the number of slots per pole per phase, P2 is the number of salient pole structures in each rotor punching (ie, the number of pole pairs of the rotor module 20), and a2 and b2 are irreducible fractions.
[0044] The value range of θ2 is 5° to 20°, and the adjustment parameter n2 is determined according to the value range of θ2.
[0045] The fifth embodiment of the present utility model discloses a reluctance type rotary transformer, comprising a winding module, a stator module and the rotor module in the fourth embodiment.
[0046] The sixth embodiment of the present utility model discloses a sensor, including the reluctance rotary transformer in the fifth embodiment.
[0047] In the rotor module 10 disclosed in the first embodiment of the present invention, each rotor punching 11 is rotated and staggered by a certain angle relative to the adjacent rotor punching 11 to form Figure 1 The spiral twist structure shown; in the rotor module 20 disclosed in the fourth embodiment of the present utility model, each group of rotor punching groups 21 including multiple rotor punchings overlapping each other is rotated and staggered by a certain angle compared with the adjacent rotor punching groups 21 also including multiple rotor punchings overlapping each other, forming Figure 2 The segmented staggered structure shown. Through the setting of these structures, the size of the salient pole structure can be averaged, the error caused by the uniform lamination of the mold size deviation is solved, and the influence of the size error of the salient pole structure is weakened, thereby solving the problem of poor rotor size consistency of the reluctance rotary transformer, making the output signal of the reluctance rotary transformer regular, the electrical error can be very small, and the accuracy can be very high.
[0048] The following provides a specific implementation scheme for the structure of a rotor module. In this specific embodiment, a multi-pole reluctance rotary transformer with 10 teeth and 4 pairs of poles (the 10 teeth refer to the stator module corresponding to the rotor module has 10 teeth, and the 4 pairs of poles refer to the rotor module containing 4 salient pole structures) and an outer diameter of 37 mm is taken as an example to illustrate the design schemes of the spiral twist structure in Example 1 and the segmented staggered structure in Example 4.
[0049] In a specific example, the parameters of the rotor module of the helical skew structure are calculated as follows.
[0050]
[0051] Among them, q is the number of slots per pole per phase, Z is the number of stator teeth of the reluctance resolver, and P is the number of rotor pole pairs of the reluctance resolver, that is, the number of salient poles. a and b are irreducible fractions. According to the above formula, a is 5 and b is 8.
[0052] The rotor modules rotate at an offset angle of:
[0053]
[0054] Wherein, n is an adjustment parameter, and n can be 1, 2, 3, ... Specifically, θ can be 5° to 20°. In this specific embodiment, let n = 2, then θ = 9°. Therefore, the rotation staggered angle of the rotor module of the spiral skew structure is 9°, and right-handed or left-handed is adopted. Specifically, the rotation staggered angle of each rotor punching is 9° / k, and k is the number of rotor punchings contained in the rotor module. For example, k = 20, at this time, the rotation staggered angle of each rotor punching is 0.45°.
[0055] In another specific example, the above calculation shows that the staggered angle of rotation of the rotor module of the segmented staggered structure is 9°. The rotor module is divided into 4 segments, and each segment is staggered by 2.25°.
[0056] The utility model designs the rotor of the reluctance rotary transformer as a spiral twisted skew structure or a segmented staggered skew structure, wherein the rotor punching sheets are continuously staggered by a preset angle or segmented staggered by a preset angle, so that the size of the salient pole structure can be averaged, the error caused by the uniform stacking of the mold size deviation is solved, and the influence of the size error of the salient pole structure is weakened; thereby, the error caused by the consistency of the rotor salient pole size is reduced, the rotor size accuracy of the reluctance rotary transformer is improved, and the output signal accuracy of the reluctance rotary transformer is improved.
[0057] The background section of the utility model may contain background information about the problem or environment of the utility model, rather than describing the prior art by others. Therefore, the content contained in the background technology section is not an admission of the applicant to the prior art.
[0058] The above content is a further detailed description of the utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the utility model. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of mutual contradiction, the technical personnel in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope defined by the appended claims.
Claims
1. A rotor module, characterized in that: It includes multiple rotor punching groups; Each group of the rotor punching sets includes one rotor punching or multiple rotor punchings overlapped and laminated with each other, an axial hole is respectively provided at the center of each rotor punching, and multiple salient pole structures are respectively provided at the outer circumference of each rotor punching; Each group of the rotor punching groups is overlapped with each other along the axial direction of the rotor punching groups; in each two adjacent groups of the rotor punching groups, the rotor punching groups located in the second direction are rotated in the same direction around the axis of the rotor punching group by a preset angle compared to the rotor punching groups located in the first direction, and the first direction and the second direction are two opposite directions in the axial direction of the rotor punching groups.
2. The rotor module according to claim 1, characterized in that: In each of two adjacent groups of the rotor punching groups, the rotor punching groups located in the second direction are staggered by a preset angle in clockwise rotation around the axis of the rotor punching groups compared to the rotor punching groups located in the first direction; or, In each of two adjacent groups of the rotor punching groups, the rotor punching groups located in the second direction are staggered by a preset angle in counterclockwise rotation around the axis of the rotor punching groups compared to the rotor punching groups located in the first direction.
3. The rotor module according to claim 1, characterized in that: The number of the rotor punchings contained in each group of the rotor punching groups is the same.
4. The rotor module according to claim 1, characterized in that: The thickness of each group of rotor punching sheets is the same.
5. The rotor module according to claim 1, characterized in that: The number of rotor punching groups is greater than or equal to 2.
6. The rotor module according to any one of claims 1 to 5, characterized in that: The preset angle is α, and α=θ / k, wherein k is the number of rotor punching sets, and θ is the rotational offset angle of the rotor modules.
7. The rotor module according to claim 6, characterized in that: The angle θ of the rotor module rotation staggered is: Wherein, n is an adjustment parameter, and n is a positive integer, Z is the number of teeth of the stator module corresponding to the rotor module, and b is taken using the following formula: Wherein, P is the number of salient pole structures in each of the rotor punchings, and a and b are irreducible fractions.
8. The rotor module according to claim 6, characterized in that: The value range of θ is 5° to 20°, wherein the adjustment parameter n is determined according to the value range of θ.
9. A reluctance rotary transformer, characterized in that: The invention comprises a winding module, a stator module and a rotor module according to any one of claims 1 to 8.
10. A sensor, characterized in that: It includes the reluctance type rotary transformer as claimed in claim 9.