Reluctance type rotary transformer
By using stamped laminations with different conductivity and heat dissipation hole design in the reluctance rotary transformer, the rotor heating problem caused by eddy currents was solved, and the lifespan of the rotor and the reluctance rotary transformer was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-04-03
AI Technical Summary
The excitation winding and the output winding are placed in the same stator slot, which causes eddy currents to be generated, resulting in rotor heating and shortening the life of the reluctance rotary transformer.
Multiple stamped laminations are used, and the design utilizes materials with different conductivity and thicknesses that are inversely proportional. Combined with periodic arrangement and heat dissipation holes on the outer shell, the heat generated by eddy currents is reduced.
It effectively reduces eddy current heat in the rotor, extending the lifespan of the rotor and the reluctance rotary transformer.
Smart Images
Figure CN224082308U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of rotary transformer technology, and more particularly to a reluctance rotary transformer. Background Technology
[0002] In the field of rotary transformer technology, the excitation winding and output winding of a reluctance rotary transformer must be placed in the same slot of the stator.
[0003] However, the method of placing the excitation winding and the output winding in the same slot of the stator causes eddy currents to be induced in the rotor in both the excitation winding and the output winding.
[0004] The generation of eddy currents heats the rotor, accelerates rotor aging, and shortens rotor life, which in turn shortens the life of the entire reluctance rotary transformer.
[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0006] This application provides a reluctance rotary transformer that at least partially reduces eddy currents induced in the rotor and improves the lifespan of the reluctance rotary transformer.
[0007] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.
[0008] According to one aspect of this application, a reluctance rotary transformer is provided, comprising: a stator, a rotor, and a housing; wherein the rotor comprises a plurality of stamped laminations having the same axial cross-sectional shape, the plurality of stamped laminations comprising two materials having different conductivity; the thickness of the stamped laminations is inversely proportional to the conductivity of the respective material; the stamped laminations have at least two salient poles; and the sidewalls of the housing are provided with a plurality of heat dissipation holes.
[0009] By using multiple stamped laminations to form the rotor, the current in the entire rotor can be reduced, thereby reducing eddy current heat generation and avoiding the generation of large eddy currents.
[0010] Furthermore, by configuring the stamped laminations to include materials with different conductivity, the current between the laminations can be further reduced, thereby further reducing eddy current heat generation.
[0011] Furthermore, by configuring the thickness of the stamped laminations to be inversely proportional to the conductivity of the material, the resistance of the stamped laminations themselves can be reduced, thereby reducing eddy current heat generation.
[0012] Furthermore, by configuring multiple heat dissipation holes on the outer casing, heat dissipation is facilitated, reducing the impact of eddy current heat on the rotor.
[0013] In one embodiment of this application, the plurality of stamped laminations are arranged periodically according to the conductivity of their respective materials; each period includes a sequential arrangement and a reverse arrangement; wherein, the sequential arrangement is to stack the stamped laminations in descending order of conductivity of their respective materials, and the reverse arrangement is to stack the stamped laminations in ascending order of conductivity of their respective materials; the last stamped lamination in the sequential arrangement of each period is the first stamped lamination in the reverse arrangement; in adjacent periods, the last stamped lamination in the reverse arrangement of the previous period is the first stamped lamination in the sequential arrangement of the next period.
[0014] Arranging stamped laminations with different conductivity in a periodic manner can reduce the resistance between different stamped laminations, reduce the heat generated by induced current in the rotor, improve rotor life, and thus improve the life of the entire reluctance rotary transformer.
[0015] In one embodiment of this application, the two materials include a first material and a second material; among the plurality of stamped laminations, the one formed from the first material is the first stamped lamination, and among the plurality of stamped laminations, the one formed from the second material is the second stamped lamination; the first stamped lamination and the second stamped lamination are arranged alternately.
[0016] In one embodiment of this application, a circular through hole is provided in the central region of each stamped lamination.
[0017] By setting a circular through hole in the center area of the stamped laminations, the difficulty of generating eddies can be increased and the magnitude of the current after the eddies are formed can be reduced without affecting the rotor rotation, thus reducing the heat generated by the eddies.
[0018] In one embodiment of this application, the at least two convex poles are uniformly arranged around the stamped lamination, and different convex poles have the same shape; the distance from the farthest point of the convex pole to the center of the stamped lamination is a first distance, and the distance from the nearth point of the convex pole to the center of the stamped lamination is a second distance, and the ratio of the first distance to the second distance is not less than a preset value; the farthest point is the point of the convex pole farthest from the center of the stamped lamination, and the nearth point is the point of the convex pole closest to the center of the stamped lamination.
[0019] By configuring the ratio of the first distance to the second distance to be no less than a preset value, the difficulty of generating eddy currents can be increased, the size of the generated eddy currents can be reduced, thereby reducing the heat generated by the eddy currents, increasing the rotor life, and thus increasing the life of the entire reluctance rotary transformer.
[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0022] Figure 1 A schematic diagram of a reluctance rotary transformer according to one embodiment of this application is shown;
[0023] Figure 2 A schematic diagram of the rotor of a reluctance rotary transformer according to one embodiment of this application is shown;
[0024] Figure 3 A schematic diagram of a circular through hole on a stamped lamination in one embodiment of this application is shown;
[0025] Figure 4 This diagram illustrates the near and far points on a stamped lamination in one embodiment of the present application. Detailed Implementation
[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0027] Furthermore, the accompanying drawings are merely illustrative of this application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore, repeated descriptions of them will be omitted. It should be noted that the concepts of "first," "second," etc., mentioned in this application are only used to distinguish different stamping laminations, materials, etc.
[0028] like Figure 1 and Figure 2 As shown, the reluctance rotary transformer in this embodiment includes a rotor 1, a stator 2, and a housing.
[0029] The rotor 1 includes multiple stamped laminations 11, each stamped lamination 11 having the same axial cross-sectional shape, and the multiple stamped laminations 11 comprising two materials with different electrical conductivity.
[0030] The thickness of the stamped lamination 11 is inversely proportional to the conductivity of the material to which it belongs.
[0031] The stamped lamination 11 has at least two salient poles.
[0032] The sidewalls of the casing have multiple ventilation holes.
[0033] It should be noted that, Figure 1 It is not depicted as an outer shell.
[0034] By using multiple stamped laminations to form the rotor, the current in the entire rotor can be reduced, thereby reducing eddy current heat generation and avoiding the generation of large eddy currents.
[0035] Furthermore, by configuring the stamped laminations to include materials with different conductivity, the current between the laminations can be further reduced, thereby further reducing eddy current heat generation.
[0036] Furthermore, by configuring the thickness of the stamped laminations to be inversely proportional to the conductivity of the material, the resistance of the stamped laminations themselves can be reduced, thereby reducing eddy current heat generation.
[0037] Furthermore, by configuring multiple heat dissipation holes on the outer casing, heat dissipation is facilitated, reducing the impact of eddy current heat on the rotor.
[0038] In one embodiment, the plurality of stamped laminations 11 are arranged periodically according to the conductivity of their respective materials.
[0039] Each cycle consists of a sequential arrangement and a reverse arrangement.
[0040] The first order is to stack the stamped laminations 11 in descending order of conductivity of the material to which they belong, while the second order is to stack the stamped laminations 11 in ascending order of conductivity of the material to which they belong.
[0041] In each cycle, the last stamped lamination 11 in the sequential arrangement is the first stamped lamination 11 in the reverse arrangement.
[0042] In adjacent cycles, the last stamped lamination 11 arranged in reverse order in the previous cycle becomes the first stamped lamination 11 arranged in sequence in the next cycle.
[0043] Arranging stamped laminations with different conductivity in a periodic manner can reduce the resistance between different stamped laminations, reduce the heat generated by induced current in the rotor, improve rotor life, and thus improve the life of the entire reluctance rotary transformer.
[0044] In one embodiment, the two materials include a first material and a second material.
[0045] Of the plurality of stamped laminations 11, the one formed of the first material is the first stamped lamination 11, and the one formed of the second material is the second stamped lamination 11.
[0046] The first stamped lamination 11 and the second stamped lamination 11 are arranged alternately.
[0047] In one embodiment, such as Figure 3 As shown, each stamped lamination 11 has a circular through hole 110 in its central region.
[0048] By setting a circular through hole in the center area of the stamped laminations, the difficulty of generating eddies can be increased and the magnitude of the current after the eddies are formed can be reduced without affecting the rotor rotation, thus reducing the heat generated by the eddies.
[0049] In one embodiment, such as Figure 4 As shown, the at least two convex poles are uniformly arranged around the stamped lamination 11, and the different convex poles have the same shape.
[0050] The distance from the far point 111 of the salient pole to the center position 113 of the stamped lamination 11 is the first distance, and the distance from the near point 112 of the salient pole to the center position 113 of the stamped lamination 11 is the second distance. The ratio of the first distance to the second distance is not less than a preset value.
[0051] The farthest point 111 is the point in the salient pole that is farthest from the center position 113 of the stamped lamination 11, and the nearest point 112 is the point in the salient pole that is closest to the center position 113 of the stamped lamination 11.
[0052] By configuring the ratio of the first distance to the second distance to be no less than a preset value, the difficulty of generating eddy currents can be increased, the size of the generated eddy currents can be reduced, thereby reducing the heat generated by the eddy currents, increasing the rotor life, and thus increasing the life of the entire reluctance rotary transformer.
[0053] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the appended claims.
Claims
1. A magnetic reluctance resolver characterized by comprising: The application relates to a motor comprising: a stator, a rotor and a housing; wherein the rotor comprises a plurality of stamped laminations, different stamped laminations having the same axial cross-sectional shape, the plurality of stamped laminations comprising two materials having different electrical conductivities; the thickness of a stamped lamination being inversely proportional to the electrical conductivity of the material it belongs to; the stamped laminations having at least two salient poles; the side wall of the housing being provided with a plurality of heat dissipation holes; the two materials comprising a first material and a second material; the plurality of stamped laminations formed of the first material being first stamped laminations, the plurality of stamped laminations formed of the second material being second stamped laminations; the first stamped laminations and the second stamped laminations being arranged alternately.
2. The magnetoresistive resolver according to claim 1, characterized in that each stamped lamination being provided with a circular through hole in a central region thereof.
3. The magnetoresistive resolver according to claim 1, characterized in that the at least two salient poles being arranged uniformly around the stamped laminations, and different salient poles having the same shape; a distance from a far point of a salient pole to a central position of a stamped lamination being a first distance, a distance from a near point of the salient pole to the central position of the stamped lamination being a second distance, a ratio of the first distance to the second distance being not less than a preset value; the far point being a point of the salient pole farthest to the central position of the stamped lamination, and the near point being a point of the salient pole closest to the central position of the stamped lamination.