Flat-type resolver and motor with resolver

Abstract

To provide a resolver that enables space-saving in a height direction by thinning a main body, thereby allowing downsizing when incorporated into a motor or the like.SOLUTION: A flat-type resolver 10 comprises: a primary winding part 1 that forms a rotary transformer; and a secondary winding part 4 from which a modulated signal is extracted. The primary winding part 1 and the secondary winding part 4 are arranged side by side in the radial direction, that is, both the winding parts 1, 4 are provided on a plane perpendicular to an axis 9. The primary winding part 1 is composed of a stator transformer 2 and a rotor transformer 3 disposed opposite each other, and the secondary winding part 4 is composed of a stator core 5 and a rotor core 6 disposed opposite each other. The stator transformer 2 and the stator core 5 are provided on a stator 7, and the rotor transformer 3 and the rotor core 6 are provided on a rotor 8.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a flat resolver and a motor with a resolver, and more particularly to a novel structure for realizing space saving of the resolver. [Background technology]

[0002] Fig. 6 is a half-sectional view showing the structure of a conventional resolver. As shown in the figure, a conventional resolver 610 has a primary winding section 61 consisting of an opposing stator transformer 62 and rotor transformer 63, and a secondary winding section 64 consisting of an opposing stator core 65 and rotor core 66, which are arranged vertically (in the height direction) along an axis 69, i.e., in the figure, the primary winding section 61 is above the secondary winding section 64. For this reason, the height dimension is fixed to a considerable extent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-162577 "Flat resolver" [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-039397 "Flat resolver" Summary of the Invention [Problem to be solved by the invention]

[0004] As shown in Fig. 6, in a conventional resolver structure, the elements of the primary winding 61 and secondary winding 64 that make up the resolver function are arranged vertically, so the height dimension is fairly fixed. Therefore, there is a drawback in that it is difficult to reduce the space required in the height direction.

[0005] Therefore, the problem that the present invention aims to solve is to provide a resolver that eliminates the problems of the conventional technology, has a thin body that can save space in the height direction, and allows for miniaturization when incorporated into a motor or the like. [Means for solving the problem]

[0006] As a result of studying the above-mentioned problems, the inventors of the present application came up with the idea of arranging the primary winding and secondary winding horizontally while maintaining the opposing directions of the elements that make up the primary winding and secondary winding, thereby making the main body thinner. In other words, this is a resolver structure in which the primary winding and secondary winding are arranged in a horizontal line along with their constituent elements. Based on this idea, the inventors have completed the present invention, which solves the above-mentioned problems. That is, the invention claimed in this application, or at least the invention disclosed therein, as a means for solving the above-mentioned problems is as follows.

[0007] [1] The primary winding that constitutes the rotary transformer and A resolver comprising a secondary winding portion from which a modulated signal is extracted, The primary winding section is composed of a rotor transformer and a stator transformer. The secondary winding consists of a rotor core and a stator core. Only the secondary winding is composed of two-phase coils, This is a method in which voltage is applied to one phase of the primary winding coil, and voltage is output from two phases of the secondary winding coil. The primary winding portion and the secondary winding portion are arranged in parallel in the radial direction. A flat resolver characterized by: [2] The flat resolver according to [1], characterized in that the primary winding portion is provided on the inner diameter side and the secondary winding portion is provided on the outer diameter side. [3] The flat resolver according to [1], characterized in that the primary winding portion is provided on the outer diameter side and the secondary winding portion is provided on the inner diameter side. [4] The flat resolver according to [1], characterized in that the outermost part of the primary winding section and the entire secondary winding section is a stator transformer that is an element of the primary winding section. [5] The flat resolver according to [1], wherein the outermost part of the primary winding section and the entire secondary winding section is a rotor transformer that is an element of the primary winding section.

[0008] [6] The flat resolver according to [1], characterized in that the outermost part of the primary winding section and the entire secondary winding section is a stator core that is an element of the secondary winding section. [7] The flat resolver according to [1], wherein the outermost part of the primary winding section and the entire secondary winding section is a rotor core that is an element of the secondary winding section. [8] A flat resolver according to any one of [1], [2], [3], [4], [5], [6], and [7], characterized in that the axial dimension, i.e., height, is 90% or less compared to a configuration in which the specifications of the primary winding section and the secondary winding section are the same but are arranged side by side in the axial direction. [9] A resolver-equipped motor, characterized in that the flat resolver according to any one of [1], [2], [3], [4], [5], [6], and [7] is attached. [Effects of the Invention]

[0009] Because the flat resolver and resolver-equipped motor of the present invention are configured as described above, they enable the main body to be made thinner by reducing the height while maintaining the resolver's functionality, thereby saving space in the vertical direction and easing the conditions for installing the resolver. For example, when this flat resolver is attached to a motor, the overall length including the sensor section can be reduced, realizing a compact motor as a whole. Furthermore, space savings are also realized, such as allowing installation in a narrow space.

[0010] Furthermore, the flat resolver etc. of the present invention also has the effect of reducing the burden of switching equipment at manufacturing sites. That is, the winding machine used to manufacture conventional resolvers can be used as is to manufacture the flat resolver of the present invention. This is because there is no need to make major changes to the shapes of the core and transformer for both the primary winding and secondary winding, and it is only necessary to change the layout of each (at least the conventional core can be used as is). Therefore, there is no need to change the manufacturing equipment, or even if there is, it can be kept to a minimum, and conventional manufacturing processes can be used as is.

[0011] Although the specifications of the motor to which the flat resolver of the present invention is applied are not limited, it is particularly suitable for larger motors. This is because the impact of lateral expansion on large motors is small or not significant. Furthermore, the technologies disclosed in the above-mentioned patent documents differ from the present invention in the opposing structure and arrangement of the windings. That is, in the prior art, the windings are arranged parallel to the installation surface, whereas in the present invention, the windings are arranged perpendicular to the installation surface. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a half cross-sectional view showing the structure of a first embodiment of a flat resolver according to the present invention. [Figure 1-2] FIG. 2 is a wiring diagram of the flat-type resolver shown in FIG. 1 according to the first embodiment of the present invention. [Figure 2] FIG. 4 is a half cross-sectional view showing the structure of a second embodiment of a flat resolver according to the present invention. [Figure 3] FIG. 10 is a half cross-sectional view showing the structure of a third embodiment of a flat resolver according to the present invention. [Figure 4] FIG. 10 is a half cross-sectional view showing the structure of a fourth embodiment of a flat resolver according to the present invention. [Figure 5] 1 is a half cross-sectional view comparing the height of a flat resolver according to a first embodiment of the present invention with that of a conventional resolver. [Figure 6] FIG. 1 is a half cross-sectional view showing the structure of a conventional resolver. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described in detail below with reference to the drawings. Figure 1 is a half-sectional view showing the structure of a first embodiment of a flat-type resolver according to the present invention. As shown in the figure, this flat-type resolver 10 comprises a primary winding 1 that constitutes a rotary transformer, and a secondary winding 4 from which a modulated signal is extracted. The primary winding 1 and secondary winding 4 are arranged side by side in the radial direction, i.e., both windings 1 and 4 are provided on a plane perpendicular to the direction of the axis 9. The primary winding 1 comprises an opposing stator transformer 2 and rotor transformer 3, and the secondary winding 4 comprises an opposing stator core 5 and rotor core 6. The stator transformer 2 and stator core 5 are provided on a stator 7, and the rotor transformer 3 and rotor core 6 are provided on a rotor 8.

[0014] The stator 7 is the stator of the flat resolver 10 of the present invention, and the rotor 8 is the rotor of the flat resolver 10 of the present invention. The stator 7 side is fixed to a motor (not shown). More specifically, the resolver 10 has a primary winding section made up of a rotor transformer and a stator transformer, a secondary winding section made up of a rotor core and a stator core, and only the secondary winding section is made up of a two-phase coil, and a voltage is applied to one-phase coil of the primary winding section, and a voltage is output from the two-phase coil of the secondary winding section.

[0015] In this flat resolver 10 configured as described above, the primary winding section 1 consisting of the stator transformer 2 and rotor transformer 3 acts as a rotary transformer, and a modulated signal is extracted by the secondary winding section 4 consisting of the stator core 5 and rotor core 6, thereby functioning as a resolver. Furthermore, since the primary winding section 1 and the secondary winding section 4 are arranged side by side in a row in the radial direction rather than stacked in the axial direction 9, the height can be reduced, making it possible to install in a narrow space.

[0016] 1-2 is a wiring diagram of the first embodiment of the flat-type resolver of the present invention shown in FIG. 1. The illustrated side, i.e., the rotary transformer, is made up of a stator transformer 2 and a rotor transformer 3, and their windings are indicated by the respective reference numerals. Similarly, the windings of the rotor core 6 and stator core 5, which form the output side, are also indicated by the respective reference numerals. In the drawing, the reference numerals in parentheses accompanying each reference numeral indicate corresponding elements in the second, third, and fourth embodiments, which will be described later.

[0017] As shown in Fig. 1, this flat-type resolver 10 can be configured such that the primary winding portion 1 is provided on the inner diameter side and the secondary winding portion 4 is provided on the outer diameter side. However, this is just one example, and the juxtaposition method of the primary winding portion and the secondary winding portion is not limited to that shown. Fig. 2 is a half-sectional view showing the structure of a second embodiment of a flat-type resolver of the present invention, which also has a configuration in which the primary winding portion 21 is provided on the inner diameter side and the secondary winding portion 24 is provided on the outer diameter side. However, the arrangement of the elements that make up each winding portion differs between the first embodiment resolver 10 and the second embodiment resolver 210.

[0018] Fig. 3 is a half sectional view showing the structure of a third embodiment of a flat-type resolver according to the present invention. As shown in the figure, this flat-type resolver 310 has a configuration in which the primary winding portion 31 is provided on the outer diameter side and the secondary winding portion 34 is provided on the inner diameter side. Fig. 4 is a half sectional view showing the structure of a fourth embodiment of a flat-type resolver according to the present invention. A resolver 410 of the fourth embodiment also has a configuration in which the primary winding portion 41 is provided on the outer diameter side and the secondary winding portion 44 is provided on the inner diameter side. However, the arrangement of the elements that make up each winding portion differs between the resolver 310 of the third embodiment and the resolver 410 of the fourth embodiment.

[0019] 3, the flat resolver 310 can be arranged so that the outermost part of the entire primary winding section 31 and secondary winding section 34 is the stator transformer 32, an element of the primary winding section 31. That is, the primary winding section 31 is on the outer diameter side, while the stator transformer 32, one of its elements, is on the outermost diameter side, and the rotor transformer 33 facing it is on the inner diameter side. In the secondary winding section 34 arranged on the inner diameter side, the rotor core 36 faces the rotor transformer 33, and the stator core 35 is arranged at the innermost position.

[0020] 4, the flat resolver 410 can be arranged so that the outermost part of the entire primary winding section 41 and secondary winding section 44 is the rotor transformer 43, an element of the primary winding section 41. That is, the primary winding section 41 is on the outer diameter side, while the rotor transformer 43, one element of the primary winding section 41, is on the outermost diameter side, and the stator transformer 42 facing it is on the inner diameter side. In the secondary winding section 44 arranged on the inner diameter side, the stator core 45 faces the stator transformer 42, and the rotor core 46 is arranged at the innermost position.

[0021] As shown in Fig. 1, the flat resolver 10 can be arranged so that the outermost part of the primary winding section 1 and the entire secondary winding section 4 is the element stator core 5 of the secondary winding section 4. In other words, the secondary winding section 4 is on the outer diameter side, but its element stator core 5 is on the outermost diameter side, and the opposing rotor core 6 is on the inner diameter side. In the primary winding section 1 arranged on the inner diameter side, the rotor transformer 3 faces the rotor core 6, and the stator transformer 2 is arranged at the innermost part.

[0022] 2, the flat resolver 210 can be arranged so that the outermost part of the entire primary winding section 21 and secondary winding section 24 is the element rotor core 26 of the secondary winding section 24. That is, the secondary winding section 24 is on the outer diameter side, but its element rotor core 26 is on the outermost diameter side, and the opposing stator core 25 is on the inner diameter side. In the primary winding section 21 arranged on the inner diameter side, the stator transformer 22 faces the stator core 25, and the rotor transformer 23 is arranged at the innermost position.

[0023] The flat resolver 10 of the present invention can be configured such that the axial dimension, i.e., the height, is 90% or less of a configuration in which the specifications of the primary winding section 1 and the secondary winding section 4 are the same but are arranged side by side in the axial direction. In practice, the height can be reduced even further, and it is quite possible to make it 80% or less, 70% or less, or even 60% or less, for example.

[0024] 5 is a half cross-sectional view comparing the height of the first embodiment of the flat resolver of the present invention with that of a conventional resolver, where (a) is the conventional type and (b) is the flat resolver of the present invention. As shown in the figure, the height of this flat resolver 10 is about 56% of that of the conventional resolver 610, which is a height reduction effect of about 44%.

[0025] A resolver-equipped motor to which the flat resolver 10 having any of the above-described configurations is attached is also within the scope of the present invention. [Industrial Applicability]

[0026] The flat resolver and resolver-equipped motor of the present invention can be made thinner by reducing the height, thereby saving space in the height direction and achieving a compact motor as a whole. Therefore, this invention has high industrial applicability in the manufacture and use of resolvers and motors, as well as in all related fields. [Explanation of symbols]

[0027] 1, 21, 31, 41...Primary winding section 2, 22, 32, 42...Stator transformer 3, 23, 33, 43...Rotor transformer 4, 24, 34, 44...Secondary winding section 5, 25, 35, 45... Stator core 6, 26, 36, 46...Rotor core 7, 27, 37, 47... Stator 8, 28, 38, 48... rotors 9, 29, 39, 49...axis 10, 210, 310, 410... resolver 61...Primary winding section 62...Stator transformer 63...Rotor transformer 64...Secondary winding section 65... Stator core 66...Rotor core 67...Stator 68...Rotor 69...Axis 610...Resolver

Claims

1. The primary winding that constitutes the rotary transformer A resolver comprising a secondary winding portion from which a modulated signal is extracted, The primary winding section is composed of a rotor transformer and a stator transformer. The secondary winding consists of a rotor core and a stator core. Only the secondary winding is composed of two-phase coils, This is a method in which voltage is applied to one phase of the primary winding coil, and voltage is output from two phases of the secondary winding coil. The primary winding portion and the secondary winding portion are arranged in parallel in the radial direction. A flat resolver characterized by:

2. 2. The flat resolver according to claim 1, wherein the primary winding portion is provided on an inner diameter side, and the secondary winding portion is provided on an outer diameter side.

3. 2. The flat resolver according to claim 1, wherein the primary winding portion is provided on an outer diameter side, and the secondary winding portion is provided on an inner diameter side.

4. 2. The flat resolver according to claim 1, wherein the outermost part of the primary winding section and the entire secondary winding section is a stator transformer that is an element of the primary winding section.

5. 2. The flat resolver according to claim 1, wherein the outermost part of the primary winding section and the entire secondary winding section is a rotor transformer that is an element of the primary winding section.

6. 2. The flat resolver according to claim 1, wherein the outermost part of the primary winding section and the entire secondary winding section is a stator core which is an element of the secondary winding section.

7. 2. The flat resolver according to claim 1, wherein the outermost part of the primary winding section and the entire secondary winding section is a rotor core which is an element of the secondary winding section.

8. A flat resolver according to any one of claims 1, 2, 3, 4, 5, 6 and 7, characterized in that the axial dimension, i.e., height, is 90% or less compared to a configuration in which the specifications of the primary winding section and the secondary winding section are the same but are arranged side by side in the axial direction.

9. A resolver-equipped motor, characterized in that the flat resolver according to any one of claims 1 to 7 is attached to the motor.

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