Wire hanging column structure of transformer and rotary transformer with same
By switching brushless and brushed types using temperature control components and fan systems in the rotary transformer, the problem of signal instability caused by brush wear and insufficient accuracy during high-speed rotation is solved, and high-precision and fast-responsive rotation is achieved Transformer performance.
Patent Information
- Application Number
- CN202411551302.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2024-12-31
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During long-term use of existing rotary transformers, poor contact and arc problems caused by brush wear, affecting the stability and accuracy of signal transmission. In addition, the measurement accuracy of brushless rotary transformers is insufficient when rotating at high speed, making it difficult to meet high accuracy and real-time performance. Require.
By designing temperature control components and fan systems in the transformer, switching brushless and brushed types with the heat shrinkage and cold expansion characteristics of copper tubes and antimony copper alloys, adjusting the magnetic state of the rotor core, and optimizing air through ventilation nets and compass Circulation, realize high-precision angle detection and fast signal response.
It improves the measurement accuracy and control accuracy of the rotary transformer, extends the equipment life, ensures normal performance under high-speed operating conditions, and meets application scenarios that require high accuracy and real-time.
Smart Images
Figure CN119230268A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of rotary transformers, in particular to a transformer hanging pole structure and a rotary transformer having the same. Background Art
[0002] A resolver (resolver / transformer) is an electromagnetic sensor, also known as a synchronous resolver. It is a small AC motor used to measure angles. It is used to measure the angular displacement and angular velocity of the rotating shaft of a rotating object. It consists of a stator and a rotor. The stator winding serves as the primary side of the transformer and receives the excitation voltage. The excitation frequency is usually 400, 3000, and 5000 Hz. The rotor winding serves as the secondary side of the transformer and obtains the induced voltage through electromagnetic coupling.
[0003] The rotary transformer used in power motors is commonly a reluctance rotary transformer, which is characterized by: all signal lines are wound on the stator, and no winding is arranged on the rotor. Its structure mainly consists of a rotor pressed by silicon steel sheets, a stator pressed by silicon steel sheets and an insulating frame installed or injection molded on it, three windings wound on the insulating frame, and a signal harness and plug for transmitting signals.
[0004] According to the two different lead-out methods of the rotor winding, the rotating transformer is divided into two structural forms: brushed type and brushless type. For the brushed rotating transformer, its rotor winding is directly led out through slip rings and brushes. It is characterized by simple structure and small size. However, because the brushes and slip rings are in mechanical sliding contact, the reliability of the rotating transformer is poor and its life is short.
[0005] The brushless rotary transformer is divided into two parts, namely the rotary transformer body and the additional transformer. The primary and secondary cores and coils of the additional transformer are annular and fixed on the rotor shaft and the housing respectively, leaving a certain gap in the radial direction. The rotor winding of the rotary transformer body is connected with the primary coil of the additional transformer. The electrical signal in the primary coil of the additional transformer, that is, the electrical signal in the rotor winding, is indirectly sent out through the secondary coil of the additional transformer through electromagnetic coupling. This structure avoids the influence caused by the poor contact between the brush and the slip ring, improves the reliability and service life of the rotary transformer, but its volume, mass and cost are increased.
[0006] In the prior art, during long-term use, the brushes of a brushless rotary transformer will gradually wear out, which may cause problems such as poor contact and arcing, affecting the stability and accuracy of signal transmission and reducing the reliability of the rotary transformer. A brushless rotary transformer is mainly used to measure the angular displacement and angular velocity of a motor shaft. In order to ensure measurement accuracy, the tooth harmonics in the brushless rotary transformer must be eliminated or reduced to an appropriate range. Summary of the invention
[0007] In view of the deficiencies in the prior art, the present invention provides a transformer hanging pole structure and a rotary transformer having the same, which solves the existing problems of brushed rotary transformers and brushless rotary transformers.
[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a transformer hanging pole structure, including a stator core, the top of the stator core is provided with evenly distributed slots, and the slots are trapezoidal slots with parallel teeth, the inner wall of the stator core is fixedly connected with evenly distributed stator tooth poles, one end of the outer circle of the stator tooth pole is provided with an edge coil, and the top and bottom of the stator core are provided with stator windings.
[0009] Preferably, a rotating transformer with a transformer hanging pole structure comprises a shell, a slide groove is opened on the top of the shell, a second slider is slidably connected to the inner wall of the slide groove, a top shell is fixedly connected to the top of the second slider, the inner wall of the top shell is rotatably connected to a ventilation net, and the ventilation net is fixedly connected to the top of the shell, a top plate is arranged on the top of the inner wall of the top shell, a compass evenly distributed is fixedly connected to the top of the top plate, the inner wall of the top plate is rotatably connected to a rotor shaft, an adjustment component is arranged in the middle of the outer ring of the rotor shaft, and a temperature control component is arranged at the bottom of the shell.
[0010] Preferably, the adjustment component includes a copper tube, which is fixedly connected to the middle of the outer ring of the rotor shaft, the outer wall of the copper tube is fixedly connected with a uniformly distributed antimony-copper alloy, one end of the outer wall of the antimony-copper alloy is fixedly connected with a rotor core, the outer ring of the rotor core is provided with a rotor winding near one end of the antimony-copper alloy, the top and bottom of the rotor core are provided with permanent magnet baffles, the top of the permanent magnet baffle is provided with uniformly distributed ventilation holes, and a rotor pressure ring is provided in the middle of the top of the permanent magnet baffle.
[0011] Preferably, the temperature control component includes a bottom shell, the top of the bottom shell is fixedly connected to the bottom of the outer shell, the inner wall of the outer shell is provided with a filter screen, the bottom of the inner wall of the bottom shell is provided with a bottom plate, and the top outer ring of the bottom plate is penetrated and provided with evenly distributed stainless steel electric heating tubes.
[0012] Preferably, a first fan is fixedly connected to the bottom of the outer ring of the rotor shaft, and a second fan is fixedly connected to the top of the outer ring of the rotor shaft.
[0013] Preferably, the inner wall of the shell is provided with evenly distributed limiting grooves, the inner wall of the limiting groove is slidably connected with a first slider, and the first slider is fixedly connected to the stator core.
[0014] The present invention provides a transformer hanging pole structure and a rotary transformer having the same, which has the following beneficial effects: 1. The present invention heats the adjustment component through the temperature control component, thereby converting the rotary transformer into a brushless type. In situations where high-precision angle detection is required, switching from a brushed type to a brushless type can improve measurement accuracy and control accuracy. When the equipment needs to work in a high-speed rotation state, switching to a brushless type can ensure the normal performance of the rotary transformer under high-speed conditions.
[0015] 2. The present invention cools down the adjustment component through the first fan and the second fan, passes a DC current through the stator winding, magnetizes the rotor core, and switches from a brushless type to a brushed type. In some application scenarios that require extremely high signal response speed, a brushed rotary transformer may be able to convert the rotor position information into an electrical signal output more quickly, thereby meeting the system's real-time requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the stator core of the present invention; Figure 2 A three-dimensional diagram of the stator core of the present invention; Figure 3 It is a schematic diagram of a rotary transformer of the present invention; Figure 4 It is a schematic diagram of the rotor core of the present invention; Figure 5 is a schematic diagram of a stator winding of the present invention; Figure 6 is a cross-sectional view of a rotary transformer of the present invention; Figure 7 It is a schematic diagram of the rotor winding of the present invention; Figure 8 It is an exploded view of the shell of the present invention.
[0017] Among them, 1. stator core; 2. outer shell; 3. bottom shell; 4. top shell; 5. top plate; 6. compass; 7. rotor shaft; 8. permanent magnet baffle; 9. vent; 10. rotor pressure ring; 11. rotor core; 12. first slider; 13. stator winding; 14. edge coil; 15. bottom plate; 16. stainless steel electric heating tube; 17. first fan; 18. second fan; 19. copper tube; 20. antimony copper alloy; 21. rotor winding; 22. slide slot; 23. second slider; 24. ventilation net; 25. filter net; 26. limit slot; 27. stator tooth pole; 28. slot. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] Example Please refer to the attached Figure 1 - Attachment Figure 2 and attached Figure 5 The embodiment of the present invention provides a transformer hanging pole structure, including a stator core 1, the top of the stator core 1 is provided with evenly distributed slots 28, and the slots 28 are trapezoidal slots with parallel teeth, the inner wall of the stator core 1 is fixedly connected with evenly distributed stator tooth poles 27, one end of the outer circle of the stator tooth poles 27 is provided with an edge coil 14, and the top and bottom of the stator core 1 are provided with stator windings 13; The windings may have a unique distribution in the trapezoidal slots to fully utilize the slot space. Compared with the traditional rectangular slots, the trapezoidal slots may make the winding arrangement in the slots more compact, which helps to reduce the length of the winding ends, reduce the leakage reactance, and improve the efficiency of the transformer.
[0020] Please refer to the attached Figure 3 and attached Figure 8 A rotary transformer with a transformer hanging pole structure comprises a shell 2, a slide groove 22 is provided on the top of the shell 2, a second slider 23 is slidably connected to the inner wall of the slide groove 22, a top shell 4 is fixedly connected to the top of the second slider 23, a ventilation net 24 is rotatably connected to the inner wall of the top shell 4, and the ventilation net 24 is fixedly connected to the top of the shell 2, a top plate 5 is provided on the top of the inner wall of the top shell 4, a compass 6 evenly distributed is fixedly connected to the top of the top plate 5, a rotor shaft 7 is rotatably connected to the inner wall of the top plate 5, an adjustment component is provided in the middle of the outer ring of the rotor shaft 7, and a temperature control component is provided at the bottom of the shell 2; When in use, the top shell 4 is rotated, and the air volume is adjusted by matching the through holes on the top shell 4 with the through holes on the ventilation net 24, thereby accelerating the circulation of air and cooling the copper tube 19, the antimony copper alloy 20 and the rotor core 11. When the magnetization is completed, the magnetization effect is detected by the compass 6 on the top plate 5. The air volume can be adjusted by rotating the top shell 4, thereby adjusting the heating or cooling time. The rotation angle of the rotor shaft 7 directly reflects the rotation angle information of the object being measured.
[0021] Please refer to the attached Figure 4 and attached Figure 7The regulating component includes a copper tube 19, which is fixedly connected to the middle of the outer ring of the rotor shaft 7, and the outer wall of the copper tube 19 is fixedly connected with a uniformly distributed antimony copper alloy 20, and one end of the outer wall of the antimony copper alloy 20 is fixedly connected with a rotor core 11, and the outer ring of the rotor core 11 is provided with a rotor winding 21 near one end of the antimony copper alloy 20, and the top and bottom of the rotor core 11 are provided with a permanent magnet baffle 8, and the top of the permanent magnet baffle 8 is provided with a uniformly distributed vent 9, and the top middle of the permanent magnet baffle 8 is provided with a rotor pressing ring 10; The rotor core 11 is made of NdFeB permanent magnet material. The antimony copper alloy 20 is heated through the copper tube 19 and the antimony copper alloy 20 (antimony will show the characteristics of thermal contraction and cold expansion within a certain temperature range, and copper can enhance the thermal conductivity of antimony), so that the antimony copper alloy 20 is reduced, so that the rotor core 11 is not in contact with the stator core 1. At the same time, the rotor core 11 is heated by hot air, and when the temperature of the NdFeB permanent magnet material is raised to the Curie temperature (generally around 300°C-400°C), the rotor core 11 in the present application is demagnetized, so that the rotating variable in the present application The transformer is changed into a brushless rotary transformer. When the brushless rotary transformer is used, the temperature is maintained by the stainless steel electric heating tube 16 and the first fan 17. The air can be guided to flow in a targeted manner through the permanent magnet baffle 8 and the vent 9, so that the air is more evenly distributed inside the rotary transformer. The permanent magnet baffle 8 can prevent foreign objects from directly hitting or rubbing the rotor core 11 in some complex working environments. The rotor pressing ring 10 presses the core by applying a certain axial pressure to prevent the silicon steel sheet from loosening and shifting, thereby ensuring the integrity and stability of the rotor core 11.
[0022] Please refer to the attached Figure 6 and attached Figure 8 The temperature control assembly includes a bottom shell 3, the top of the bottom shell 3 is fixedly connected to the bottom of the outer shell 2, the inner wall of the outer shell 2 is provided with a filter screen 25, the bottom of the inner wall of the bottom shell 3 is provided with a bottom plate 15, the top outer ring of the bottom plate 15 is penetrated and provided with uniformly distributed stainless steel electric heating tubes 16, the bottom of the outer ring of the rotor shaft 7 is fixedly connected to a first fan 17, and the top of the outer ring of the rotor shaft 7 is fixedly connected to a second fan 18; When it is necessary to switch to brushless mode, the stainless steel electric heating tube 16 is turned on, and the first fan 17 is driven to rotate through the rotor shaft 7, and the outside air is drawn into the outer shell 2 through the through hole on the bottom shell 3, and the air is filtered through the filter 25, and the air is heated by the stainless steel electric heating tube 16. The first fan 17 sends the hot air to the copper tube 19, the antimony copper alloy 20 and the rotor core 11, and the copper tube 19, the antimony copper alloy 20 and the rotor core 11 are heated by the hot air. When it is necessary to switch to brushless mode, the stainless steel electric heating tube 16 is turned off, and the first fan 17 and the second fan 18 are driven to rotate through the rotor shaft 7, and the copper tube 19, the antimony copper alloy 20 and the rotor core 11 are cooled down, so that the rotor core 11 is kept at room temperature (air temperature). Then, a DC current is passed through the stator winding 21 to generate a stable magnetic field. When the rotor core 11 is placed in the magnetic field, the magnetic domains inside the rotor core 11 are oriented and arranged under the action of the magnetic field, thereby obtaining magnetism.
[0023] Please refer to the attached Figure 5 and attached Figure 8 The inner wall of the housing 2 is provided with uniformly distributed limiting grooves 26, the inner wall of the limiting groove 26 is slidably connected with the first slider 12, and the first slider 12 is fixedly connected to the stator core 1; The cooperation between the limiting groove 26 and the first slider 12 prevents the stator core 1, the stator tooth poles 27 and the stator winding 13 from displacement or deformation due to the electromagnetic force during magnetization.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A transformer hanging pole structure, comprising a stator core (1), characterized in that: The top of the stator core (1) is provided with evenly distributed slots (28), and the slots (28) are trapezoidal slots with parallel teeth. The inner wall of the stator core (1) is fixedly connected with evenly distributed stator tooth poles (27), and one end of the outer ring of the stator tooth poles (27) is provided with an edge coil (14). The top and bottom of the stator core (1) are provided with stator windings (13).
2. A rotary transformer having a transformer hanging pole structure, comprising a housing (2), characterized in that: The top of the outer shell (2) is provided with a slide groove (22), the inner wall of the slide groove (22) is slidably connected to a second slider (23), the top of the second slider (23) is fixedly connected to a top shell (4), the inner wall of the top shell (4) is rotatably connected to a ventilation net (24), and the ventilation net (24) is fixedly connected to the top of the outer shell (2), a top plate (5) is provided at the top of the inner wall of the top shell (4), a compass (6) evenly distributed is fixedly connected to the top of the top plate (5), the inner wall of the top plate (5) is rotatably connected to a rotor shaft (7), an adjustment component is provided in the middle of the outer ring of the rotor shaft (7), and a temperature control component is provided at the bottom of the outer shell (2).
3. The rotary transformer with a transformer hanging pole structure according to claim 2, characterized in that: The regulating component comprises a copper tube (19), wherein the copper tube (19) is fixedly connected to the middle of the outer ring of the rotor shaft (7), the outer wall of the copper tube (19) is fixedly connected to a uniformly distributed antimony copper alloy (20), one end of the outer wall of the antimony copper alloy (20) is fixedly connected to a rotor core (11), the outer ring of the rotor core (11) is provided with a rotor winding (21) at one end close to the antimony copper alloy (20), the top and bottom of the rotor core (11) are provided with permanent magnet baffles (8), the top of the permanent magnet baffle (8) is provided with uniformly distributed ventilation holes (9), and the top middle of the permanent magnet baffle (8) is provided with a rotor pressure ring (10).
4. The rotary transformer with a transformer hanging pole structure according to claim 2, characterized in that: The temperature control component comprises a bottom shell (3), the top of the bottom shell (3) is fixedly connected to the bottom of the outer shell (2), the inner wall of the outer shell (2) is provided with a filter screen (25), the bottom of the inner wall of the bottom shell (3) is provided with a bottom plate (15), and the top outer ring of the bottom plate (15) is penetrated and provided with evenly distributed stainless steel electric heating tubes (16).
5. The rotary transformer with a transformer hanging pole structure according to claim 2, characterized in that: A first fan (17) is fixedly connected to the bottom of the outer ring of the rotor shaft (7), and a second fan (18) is fixedly connected to the top of the outer ring of the rotor shaft (7).
6. The rotary transformer with a transformer hanging pole structure according to claim 2, characterized in that: The inner wall of the housing (2) is provided with evenly distributed limiting grooves (26), the inner wall of the limiting groove (26) is slidably connected to a first sliding block (12), and the first sliding block (12) is fixedly connected to the stator core (1).