Multi-redundancy rotary transformer and multi-redundancy motor

Abstract

The utility model relates to a multi-redundancy rotary transformer and a multi-redundancy motor, belongs to the technical field of aerospace, and solves the problems that in the prior art, a multi-redundancy rotary transformer is complex to install and has many parts, and the decoding precision of the rotary transformer is seriously influenced due to large accumulated tolerance. The rotary transformer comprises a rotary transformer rotor, a rotary transformer stator and an end cover, a plurality of rotary transformer stators and rotary transformer rotors are arranged; the rotary transformer stator is provided with a first outer circular surface; the end cover is provided with a first inner wall surface, and the first inner wall surface is attached to the first outer circular surface of the rotary transformer stator. According to the utility model, the number of motor parts is reduced, the installation of a multi-redundancy rotary transformer is simplified, and the decoding precision of motor operation and the zero setting and operation precision of the servo rudder control motor are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aerospace technology field especially relates to a kind of redundancy rotary transformer and redundancy motor. BACKGROUND

[0002] Rotary transformer is a kind of high-precision speed and position sensor, rotary motor needs to use rotary transformer to detect motor speed and position in real time, realizes motor closed-loop control.In the high reliability scene such as aerospace motor, to ensure reliability, it needs to install the rotary transformer with multiple pairs of rotary transformer stator and rotary transformer rotor, namely redundancy rotary transformer (referred to as multi-rotary transformer), ensure certain redundancy design.The rotary transformer installation in current redundancy motor system is more complex, more parts, increase the appearance of motor, and the cumulative tolerance of many parts is big, seriously affect the decoding accuracy of rotary transformer. SUMMARY

[0003] In view of the above analysis, the utility model embodiment aims at providing a kind of redundancy rotary transformer and redundancy motor, to solve the technical problem that the rotary transformer installation in prior art is complex, more parts, cumulative tolerance is big and seriously affect the decoding accuracy of rotary transformer.

[0004] The utility model mainly aims to realize through the following technical scheme:

[0005] One aspect of the utility model provides a kind of redundancy rotary transformer, including rotary transformer rotor, rotary transformer stator and end cover;

[0006] The rotary transformer stator and the rotary transformer rotor are provided with multiple pairs;The rotary transformer stator has first outer circular surface;

[0007] The end cover has first inner wall surface, and the first inner wall surface is attached to the first outer circular surface of the rotary transformer stator.

[0008] Further, it further includes rotary transformer stator compression ring;Rotary transformer stator compression ring is set between adjacent rotary transformer stator;Rotary transformer stator compression ring is used to interval and limit multiple rotary transformer stator.

[0009] Further, the rotary transformer stator further has first limit surface and second limit surface, and the two end surfaces of the rotary transformer stator compression ring are respectively abutted with the first limit surface and the second limit surface of adjacent two rotary transformer stators;

[0010] The diameter of the outer circular surface of the rotary transformer stator compression ring is equal to the diameter of the first outer circular surface.

[0011] Further, the rotary transformer stator further has second outer circular surface, and the diameter of the second outer circular surface is less than the diameter of the first outer circular surface.

[0012] Further, the end cover further has a second inner wall surface, a diameter of the second inner wall surface is greater than a diameter of the second outer circular surface.

[0013] Further, the end cover further has a fixing surface, the fixing surface is attached to the first limiting surface of the first resolver stator.

[0014] Further, the end cover further has a plurality of side walls, the plurality of side walls are arranged in a circumferential direction, and the side walls are arranged in a top-to-bottom manner and used for cooperating with the resolver stator compression ring to fix the resolver stator.

[0015] Further, the resolver stator further has a resolver stator wire harness, the resolver stator compression ring further has a first wire hole arranged in a side wall of the resolver stator compression ring, and the first wire hole is used for passing through the resolver stator wire harness.

[0016] Further, the utility model further includes a protective cover arranged outside the end cover.

[0017] The protective cover has a second wire hole arranged in a side wall of the protective cover and corresponding to the first wire hole, and the second wire hole is used for passing through the resolver stator wire harness.

[0018] In another aspect, the utility model also provides a redundant motor, which comprises the redundant resolver.

[0019] The resolver rotor is arranged on the motor rotating shaft in parallel along an axial direction of the resolver rotor, and the resolver rotor can rotate with the motor rotating shaft.

[0020] The resolver stator is arranged outside the resolver rotor.

[0021] Compared with the prior art, the utility model can achieve at least one of the following beneficial effects:

[0022] (1) Compared with the prior art, the redundant resolver in the utility model does not need a resolver stator shell, a plurality of resolver stators are directly installed to the end cover, and the attachment surfaces of the plurality of resolver stators are attached to the first inner wall surface of the end cover, thereby improving the coaxiality of the plurality of resolver stators. Since there is no resolver stator shell, on one hand, the number of motor parts is reduced, the installation of the redundant resolver is simplified, the overall motor structure is compact, and the cost is saved; on the other hand, the reduction of the number of parts reduces the tolerance accumulation of the parts, and improves the decoding accuracy, servo steering control motor zero adjustment and operation accuracy of the motor operation.

[0023] (2) The resolver stator compression ring is arranged between adjacent resolver stators and used for spacing and fixing the plurality of resolver stators. In use, the two end surfaces of the resolver stator compression ring are attached to the second limiting surface and the first limiting surface of the adjacent two resolver stators respectively.

[0024] (3) In order to ensure a certain electrical distance and play an insulating role, the diameter of the second inner wall surface is larger than the diameter of the second outer circular surface of the resolver stator, and there is a certain distance between the second inner wall surface and the second outer circular surface of the first resolver stator. The first limiting surface of the first resolver stator is attached to the fixing surface of the end cover to fix the first resolver stator.

[0025] (4) In this utility model, the end cap is provided with multiple side walls along the circumference. The top part of the side wall is high and the bottom part is low, which is used to cooperate with the resolver stator pressure rings of different heights to fix the resolver stator.

[0026] (5) In this utility model, the lead wires of the resolver stator pass through the first wire hole of the resolver stator pressure ring and the second wire hole of the protective cover, so that the resolver stator can work normally.

[0027] (6) In this utility model, multiple resolver rotors are connected in series on the motor shaft, which is beneficial to improve measurement accuracy, realize redundancy backup, and improve the reliability of the resolver and motor.

[0028] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0029] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0030] Figure 1 This is a schematic diagram of the external structure of a redundant rotary transformer according to a specific embodiment;

[0031] Figure 2 This is a schematic diagram of the internal structure of a redundant rotary transformer.

[0032] Figure 3 This is a schematic diagram of the structure of a rotary stator;

[0033] Figure 4 This is a schematic diagram of the end cap structure;

[0034] Figure 5 This is a schematic diagram of the stator pressure ring structure of a rotary transformer.

[0035] Figure 6 This is a schematic diagram of the protective cover structure.

[0036] Figure label:

[0037] 1-Resolver rotor, 2-Resolver stator, 201-First outer circular surface, 202-Second outer circular surface, 203-First limiting surface, 204-Second limiting surface, 205-Resolver stator wiring harness, 3-End cover, 301-First inner wall surface, 302-Second inner wall surface, 303-Fixing surface, 304-Side wall, 4-Resolver stator pressure ring, 401-First wire hole, 5-Protective cover, 501-Second wire hole, 6-Shaft. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0039] A specific embodiment of this utility model is as follows: Figure 1 and Figure 2 As shown, a redundant rotary transformer is disclosed, including a resolver rotor 1, a resolver stator 2, and an end cover 3.

[0040] The resolver stator 2 and resolver rotor 1 are arranged in multiple pairs. The resolver rotor 1 is mounted side-by-side on the motor shaft 6 along its axial direction and can rotate with the motor shaft 6. The resolver stator 2 is arranged corresponding to the resolver rotor 1. In this embodiment, the series connection of multiple resolver rotors 1 and resolver stator 2 is beneficial for improving measurement accuracy, achieving redundancy backup, and improving the reliability of the resolver and motor.

[0041] The resolver stator 2 is sleeved outside the resolver rotor 1. For example, as shown... Figure 3 As shown, the resolver stator 2 is cylindrical with a protrusion in the middle of its exterior. The outer surface of the protrusion is a first outer surface 201, which is used to mount it to the end cover 3. The outer surface of the cylindrical part is a second outer surface 202, specifically, the diameter of the second outer surface 202 is smaller than that of the first outer surface 201.

[0042] Furthermore, the planes at both ends of the first outer circular surface 201 are the first limiting surface 203 and the second limiting surface 204, respectively.

[0043] like Figure 4 As shown, the end cap 3 is in the shape of a shell and is fitted onto the outside of the resolver stator 2. Exemplarily, the end cap 3 is cylindrical and includes a bottom body and a side wall 304.

[0044] Multiple sidewalls 304 are provided. In this embodiment, three sidewalls 304 are provided, and the three sidewalls 304 are arranged circumferentially. Preferably, the height of the top of the sidewall 304 is set to be partially high and partially low, so that the threaded hole at the top can be aligned with the threaded hole of the resolver stator pressure ring 4 set at different heights, and fastening bolts can be inserted to fix the resolver stator 2.

[0045] Preferably, in order to fix the first rotating stator 2, the bottom of the side wall 304 of the end cover 3 is formed with a stepped structure.

[0046] The end cap 3 has a first inner wall surface 301, which is in contact with the first outer circular surface 201 of the rotary stator 2.

[0047] Multiple resolver rotors 1 and resolver stators 2 are arranged side by side along their own axial direction. The first outer circular surface 201 of the resolver rotor 1 is in contact with the first inner wall surface 301 of the end cover 3, which improves the coaxiality of the multiple resolver rotors 1.

[0048] Compared to existing technologies, the redundant resolver in this embodiment eliminates the need for a resolver stator 2 housing. Multiple resolver stators 2 are directly mounted to the end cover 3, with the mating surfaces of the multiple resolver stators 2 abutting the first inner wall surface 301 of the end cover 3, thus improving the coaxiality of the multiple resolver stators 2 installation. Furthermore, the absence of a resolver stator 2 housing reduces the number of motor parts, simplifies the redundant resolver installation, makes the overall motor structure more compact, and saves costs. On the other hand, the reduction in the number of parts reduces the cumulative tolerances of the parts, improving the decoding accuracy of motor operation and the zeroing and running accuracy of the servo motor.

[0049] Furthermore, the end cap 3 also has a second inner wall surface 302. To ensure a certain electrical distance and provide insulation, the diameter of the second inner wall surface 302 is larger than the diameter of the second outer circular surface 202 of the resolver stator 2. A fixing surface 303 is located between the first inner wall surface 301 and the second inner wall surface 302 of the end cap 3. During installation, the fixing surface 303 is in contact with the first limiting surface 203 of the first resolver stator 2 to fix the first resolver stator 2.

[0050] Furthermore, it also includes a resolver stator pressure ring 4. The resolver stator pressure ring 4 is disposed between adjacent resolver stators 2 to space out and limit the multiple resolver stators 2.

[0051] like Figure 5 As shown, the diameter of the outer circular surface of the resolver stator pressure ring 4 is equal to the diameter of the first outer circular surface 201 of the resolver stator 2. The two end faces of the resolver stator pressure ring 4 abut against the second limiting surface 204 and the first limiting surface 203 of the adjacent resolver stator 2, respectively, to fix and limit the resolver stator 2. The resolver stator pressure ring 4 has multiple flanges around its periphery, and threaded holes are provided on the flanges, corresponding to the threaded holes on the top of the side wall 304 of the end cover 3, for inserting bolts to fix the resolver stator 2.

[0052] The resolver stator pressure ring 4 also has a first wire hole 401, which is disposed on the side wall of the resolver stator pressure ring 4. The first wire hole 401 is used for passing the resolver stator wire bundle 205.

[0053] Furthermore, such asFigure 6 As shown, it also includes a protective cover 5, which is disposed outside the end cap 3.

[0054] The protective cover 5 has a second wire hole 501. The second wire hole 501 is provided on the side wall of the protective cover 5, and its position corresponds to the first wire hole 401. The second wire hole 501 is used to pass the wire harness of the resolver stator 2, so that the wire harness of the resolver stator 2 extends out of the protective cover 5.

[0055] This utility model also provides a redundant motor, including the aforementioned redundant rotary transformer.

[0056] Compared with the prior art, the advantages of the redundant motor in this utility model embodiment are the same as those of the redundant rotary transformer described above, and will not be repeated here.

[0057] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A redundant rotary transformer, characterized in that, It includes a resolver rotor (1), a resolver stator (2), and an end cap (3); The resolver stator (2) and the resolver rotor (1) are provided in multiple pairs; the resolver stator (2) has a first outer circular surface (201); The end cap (3) has a first inner wall surface (301) that is in contact with the first outer circular surface (201) of the rotary stator (2).

2. The redundant rotary transformer according to claim 1, characterized in that, It also includes a resolver stator pressure ring (4); the resolver stator pressure ring (4) is disposed between adjacent resolver stators (2); the resolver stator pressure ring (4) is used to space and limit multiple resolver stators (2).

3. The redundant rotary transformer according to claim 2, characterized in that, The resolver stator (2) also has a first limiting surface (203) and a second limiting surface (204), and the two end faces of the resolver stator pressure ring (4) abut against the first limiting surface (203) and the second limiting surface (204) of two adjacent resolver stators (2); The diameter of the outer circular surface of the rotary stator pressure ring (4) is equal to the diameter of the first outer circular surface (201).

4. The redundant rotary transformer according to claim 2, characterized in that, The rotary stator (2) also has a second outer circular surface (202), the diameter of which is smaller than the diameter of the first outer circular surface (201).

5. The redundant rotary transformer according to claim 4, characterized in that, The end cap (3) also has a second inner wall surface (302); the diameter of the second inner wall surface (302) is larger than the diameter of the second outer circular surface (202).

6. The redundant rotary transformer according to claim 3, characterized in that, The end cap (3) also has a fixing surface (303) that is in contact with the first limiting surface (203) of the first resolver stator (2).

7. The redundant rotary transformer according to claim 2, characterized in that, The end cap (3) is also provided with a side wall (304), and multiple side walls (304) are provided; multiple side walls (304) are provided along the circumferential direction; the top part of the side wall (304) is high and the bottom part is low, which is used to cooperate with the resolver stator pressure ring (4) to fix the resolver stator (2).

8. The redundant rotary transformer according to claim 2, characterized in that, The resolver stator (2) also has a resolver stator wire harness (205); the resolver stator pressure ring (4) also has a first wire hole (401), which is disposed on the side wall of the resolver stator pressure ring (4); the first wire hole (401) is used to pass through the resolver stator wire harness (205).

9. The redundant rotary transformer according to claim 8, characterized in that, It also includes a protective cover (5), which is disposed outside the end cap (3); The protective cover (5) has a second wire hole (501); the second wire hole (501) is disposed on the side wall of the protective cover (5) and corresponds to the first wire hole (401); the second wire hole (501) is used to pass through the resolver stator wire harness (205).

10. A redundant motor, characterized in that, Includes the redundant rotary transformer as described in any one of claims 1-9; The resolver rotor (1) is mounted side-by-side on the motor shaft (6) along its axial direction, and the resolver rotor (1) can rotate with the motor shaft (6); The resolver stator (2) is fitted outside the resolver rotor (1).

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