Stator framework of reluctance type rotary transformer and reluctance type rotary transformer

Abstract

The stator framework of the magnetic resistance type rotary transformer comprises a main framework and a plurality of coil inserting units which are distributed along the inner circumference of the main framework in the circumferential direction, the coil inserting units are matched with stator teeth of a stator in shape and used for winding stator windings, and the coil inserting units are arranged on the main framework. The stator winding comprises an excitation winding, a sine winding and a cosine winding, a protruding part is arranged on the surface of the wire inserting unit, the protruding part can divide the winding unit into a first winding groove and a second winding groove from inside to outside in the length direction of the stator tooth profile, the first winding groove is used for winding the excitation winding, and the second winding groove is used for winding the cosine winding. And the second winding groove is used for winding a sine winding or a cosine winding. According to the utility model, the mutual interference between the excitation winding and the sine / cosine output winding is reduced, and the electromagnetic reliability of the reluctance rotary transformer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of resolvers, in particular to a stator skeleton of a reluctance resolver and a reluctance resolver. Background Art

[0002] At present, reluctance resolvers are widely used in civil electromechanical systems, such as machine tools, new energy vehicles, etc. A reluctance resolver is composed of magnetically permeable silicon steel sheets, enameled wires, and auxiliary components such as a skeleton and a connector. The structure is very simple and is particularly suitable for accurate measurement of angles and angular velocities in extremely harsh environments. However, the windings of the reluctance resolver are prone to influence and interfere with each other, resulting in low reliability. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the problem of improving the reliability of the reluctance resolver, and provide a stator skeleton of the reluctance resolver and the reluctance resolver.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A stator skeleton of a reluctance resolver includes a main skeleton and a plurality of wire embedding units circumferentially distributed along the inner circumference of the main skeleton. The wire embedding units are shaped to fit the stator teeth of the stator and are used for winding the stator windings. The stator windings include an exciting winding, a sine winding, and a cosine winding. A protruding portion is provided on the surface of the wire embedding unit. The protruding portion can divide the winding unit in the length direction along the stator tooth shape into a first winding groove and a second winding groove from the inside to the outside. The first winding groove is used for winding the exciting winding, and the second winding groove is used for winding the sine winding or the cosine winding.

[0006] In some embodiments, the wire embedding unit includes a first wire embedding structure and a second wire embedding structure disposed on both sides of the stator tooth. The protruding portion includes a first protruding structure disposed on the first wire embedding structure and a second protruding structure disposed on the second wire embedding structure.

[0007] In some embodiments, the wire embedding unit and the protruding portion are an integrally formed structure by injection molding.

[0008] In some embodiments, the materials of the wire embedding unit and the protruding portion are nylon, fluoroplastics, or resin.

[0009] In some embodiments, a slot mouth pole shoe is provided at the end of the stator tooth, and the height of the protruding portion is 100%-120% of the height of the slot mouth pole shoe.

[0010] In some embodiments, the length ratio of the first winding groove to the second winding groove is 1:1-1:6.

[0011] The present utility model also provides a reluctance resolver, which includes a stator, a stator skeleton of the reluctance resolver as described above disposed on the stator, and a stator winding wound around the stator skeleton.

[0012] In some embodiments, the wire embedding units wound with the sine windings and the wire embedding units wound with the cosine windings are alternately arranged on the inner circumference of the main skeleton.

[0013] In some embodiments, adjacent exciting windings are wound in opposite phases on the wire embedding units.

[0014] In some embodiments, adjacent sine windings are wound in opposite phases on the wire embedding units, and adjacent cosine windings are wound in opposite phases on the wire embedding units.

[0015] The present utility model has the following beneficial effects: For the stator skeleton of the reluctance resolver and the reluctance resolver of the present utility model, by providing a protruding portion on the surface of the wire embedding unit, the winding unit is divided into a first winding groove and a second winding groove from the inside to the outside along the length direction of the stator tooth shape. The first winding groove is used for winding the exciting winding, and the second winding groove is used for winding the sine winding or the cosine winding. The exciting winding, sine winding and cosine winding of the reluctance resolver are isolated and wound at different positions of the stator teeth of the reluctance resolver, realizing physical isolation, reducing the mutual interference between the exciting winding and the sine / cosine output winding, and improving the electromagnetic reliability of the reluctance resolver. Description of the Drawings

[0016] Figure 1 is a structural diagram of the stator skeleton of the reluctance resolver in an embodiment of the present utility model;

[0017] Figure 2 is a partial structural diagram of the reluctance resolver in an embodiment of the present utility model;

[0018] Figure 3 is a winding distribution diagram of the exciting winding, sine winding and cosine winding of the reluctance resolver in an embodiment of the present utility model.

[0019] The reference numerals are as follows:

[0020] 1 - stator skeleton, 11 - main skeleton, 12 - wire embedding unit, 121 - protruding portion, 2 - stator winding, 21 - exciting winding, 22 - sine winding, 23 - cosine winding, 31 - stator tooth wound with sine winding, 32 - stator tooth wound with cosine winding. Detailed Embodiments

[0021] The following will give a detailed description of the embodiments of the present utility model. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present utility model.

[0022] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing or for coupling or communicating.

[0023] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0025] Three sets of coils are wound in the stator of a reluctance resolver (reluctance type rotary transformer), namely: an excitation input coil, a sine output coil, and a cosine output coil. The conventional winding method is to wind in three layers: the excitation coil is wound on the bottom layer, followed by the sine winding and the cosine winding. The arrangement of the excitation winding on the bottom layer will affect the arrangement of the sine and cosine output windings on the second and third layers. The arrangement of the sine winding on the second layer will affect the arrangement of the cosine winding on the third layer. Since the distribution of the sine and cosine windings presents an overall inner and outer distribution, the amplitudes of the sine and cosine voltages are inconsistent. Since the output windings are distributed in layers, the interlayer capacitance and contact capacitance are quite different, and finally the phase shift angles of the sine and cosine are quite different.

[0026] Therefore, it is necessary to design a structure that reduces the completely isolated winding of the excitation winding and the sine and cosine windings of the reluctance resolver to reduce the mutual influence and interference between the windings. The embodiments of the present utility model provide a stator skeleton of a reluctance type rotary transformer, which can solve this problem. The stator skeleton of the highly reliable reluctance resolver and the wire embedding scheme of the multi-pole reluctance resolver with an outer diameter of 52 mm in this embodiment are taken as examples:

[0027] Reference Figure 1 - Figure 2 In this embodiment, the stator skeleton 1 of the reluctance rotary transformer includes a main skeleton 11 and a plurality of wire-embedding units 12 circumferentially distributed along the inner circumference of the main skeleton 11. The wire-embedding units 12 are shaped to fit the stator teeth of the stator and are used to wind the stator winding 2. The stator winding 2 includes an exciting winding 21, a sine winding 22, and a cosine winding 23. A protruding portion 121 is provided on the surface of the wire-embedding unit 12. The protruding portion 121 can divide the winding unit in the length direction along the stator tooth shape into a first wire groove and a second wire groove from the inside to the outside. The first wire groove is used to wind the exciting winding 21, and the second wire groove is used to wind the sine winding 22 or the cosine winding 23.

[0028] The wire-embedding unit 12 in this embodiment includes a first wire-embedding structure and a second wire-embedding structure provided on both sides of the stator tooth. The protruding portion 121 includes a first protruding structure provided on the first wire-embedding structure and a second protruding structure provided on the second wire-embedding structure.

[0029] In a specific embodiment, the wire-embedding unit 12 and the protruding portion 121 are an integrally injection-molded structure. The materials of the wire-embedding unit 12 and the protruding portion 121 are nylon, fluoroplastics, or resin. In this embodiment, the wire-embedding unit 12 and the protruding portion 121 are an integrally injection-molded structure, and the materials of the wire-embedding unit 12 and the protruding portion 121 are PPS.

[0030] A notch pole shoe is provided at the end of the stator tooth in this embodiment. The height of the protruding portion 121 is the same as the height of the notch pole shoe, which is 1.5 mm. In some other embodiments, the height of the protruding portion 121 is slightly higher than the height of the notch pole shoe, within 20% higher than the height of the notch pole shoe. That is, in some embodiments, the height of the protruding portion 121 is 100%-120% of the height of the notch pole shoe, which is beneficial to preventing wire winding from running off or jumping out of the groove.

[0031] In a specific embodiment, the length ratio of the first wire groove to the second wire groove is 1:1 - 1:6. In this embodiment, the length ratio of the first wire groove to the second wire groove is 1:3, which are 0.7 mm and 2.1 mm respectively.

[0032] This embodiment also provides a reluctance rotary transformer, including a stator, the stator skeleton 1 of the reluctance rotary transformer as described above provided on the stator, and a stator winding 2 wound around the stator skeleton 1. Reference Figure 2 In this embodiment, in some of the stator teeth, the exciting winding 21 is wound in the first wire groove of the stator skeleton 1, and the sine winding 22 is wound in the second wire groove. In some other stator teeth, the exciting winding 21 is wound in the first wire groove of the stator skeleton 1, and the cosine winding 23 is wound in the second wire groove. Reference Figure 3, the stator teeth 31 wound with the sine winding 22 and the stator teeth 32 wound with the cosine winding 23 are alternately arranged on the inner circumference of the main skeleton 11, that is, the wire-inserting units 12 wound with the sine winding 22 and the wire-inserting units 12 wound with the cosine winding 23 are alternately arranged on the inner circumference of the main skeleton 11. In this embodiment, the adjacent exciting windings are wound in reverse on the wire-inserting unit 12. The adjacent sine windings 22 are wound in reverse on the wire-inserting unit 12, and the adjacent cosine windings 23 are wound in reverse on the wire-inserting unit 12. In this embodiment, a cosine winding 23 is provided between two adjacent sine windings 22, and a sine winding 22 is provided between two adjacent cosine windings 23.

[0033] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several alternatives or modifications can be made to these described embodiments, and these alternative or modified forms should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description with reference to the terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to 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. Without contradiction, those skilled in the art 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 of protection of the patent application.

Claims

1. A stator frame of a reluctance rotary transformer, comprising a main frame, and a plurality of wire-embedded units distributed along the inner circumference of the main frame, wherein the wire-embedded units match the shape of the stator teeth of the stator and are used to wind stator windings, wherein the stator windings include excitation windings, sine windings and cosine windings, and are characterized in that: A protrusion is provided on the surface of the wire embedding unit, and the protrusion can divide the wire embedding unit into a first winding groove and a second winding groove from inside to outside along the length direction of the stator tooth shape. The first winding groove is used for winding the excitation winding, and the second winding groove is used for winding the sine winding or the cosine winding.

2. The stator frame of the reluctance rotary transformer according to claim 1, characterized in that: The wire embedding unit includes a first wire embedding structure and a second wire embedding structure disposed on both sides of the stator teeth, and the protruding portion includes a first protruding structure disposed on the first wire embedding structure and a second protruding structure disposed on the second wire embedding structure.

3. The stator frame of the reluctance rotary transformer according to claim 1, characterized in that: The wire embedding unit and the protruding portion are an integral structure formed by injection molding.

4. The stator frame of the reluctance rotary transformer according to claim 3, characterized in that: The wire embedding unit and the protruding portion are made of nylon, fluoroplastic or resin.

5. The stator frame of the reluctance rotary transformer according to claim 1, characterized in that: A notch pole shoe is provided at the end of the stator tooth, and the height of the protrusion is 100%-120% of the height of the notch pole shoe.

6. The stator frame of the reluctance rotary transformer according to claim 1, characterized in that: The ratio of the length of the first winding groove to the length of the second winding groove is 1:1-1:

6.

7. A reluctance rotary transformer, characterized in that: The invention comprises a stator, a stator frame of a reluctance type rotary transformer as claimed in any one of claims 1 to 6 arranged on the stator, and a stator winding wound on the stator frame.

8. The reluctance rotary transformer according to claim 7, characterized in that: The wire-embedded units wound with the sine windings and the wire-embedded units wound with the cosine windings are alternately arranged on the inner circumference of the main frame.

9. The reluctance rotary transformer according to claim 7, characterized in that: The adjacent excitation windings are wound in reverse phase on the wire embedding unit.

10. The reluctance rotary transformer according to claim 7, characterized in that: The adjacent sine windings are wound on the wire embedding unit in reverse phase, and the adjacent cosine windings are wound on the wire embedding unit in reverse phase.

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