JP4049305B2 - Rotation angle detector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotation angle detecting device, and in particular, a plurality of annular bobbin plates for annular winding are provided at predetermined intervals via a thick plate-like portion for winding with respect to a core of an annular yoke plate. The present invention relates to a novel improvement for facilitating winding by winding a winding on the outer periphery of a plate-like thick part.
[0002]
[Prior art]
Conventionally, as this type of angle detector used heretofore, an excitation winding and an output winding are generally wound around a laminated iron core having a plurality of slits.
As a recently proposed stator of an angle detector, as shown in FIG. 12, windings 4 (6, 7) are wound around a plurality of cylindrical cores 14 provided on the stator 1. Bobbin 10 was inserted.
Furthermore, the L-shaped magnetic pole plate 3 was attached to each cylindrical core 14.
[0003]
[Problems to be solved by the invention]
Since the conventional angle detector is configured as described above, the following problems exist.
That is, in the case of the configuration using the above-described iron core, the winding operation by the winding machine becomes complicated, and the operation of the needle must be controlled by a complicated program, which makes it difficult to improve productivity.
In the case of the configuration shown in FIG. 12, bobbins each wound with a winding must be attached to the cylindrical core, and it is difficult to improve the efficiency of winding workability and assembly workability.
[0004]
The present invention has been made to solve the above-described problems, and in particular, a plurality of annular winding bobbin plates with respect to the core of the annular yoke plate via the winding plate-like thick portion. An object of the present invention is to provide a bobbin structure for a rotation angle detecting device that is provided at a predetermined interval and is wound around the outer periphery of the plate-like thick portion for winding to facilitate winding. To do.
[0005]
[Means for Solving the Problems]
The rotation angle detection device according to the present invention is provided with an excitation winding and an n-phase output winding on a ring-shaped stator, and a gap permeance between the stator and the stator is provided at a rotation angle. In a variable reluctance resolver type rotation angle detection device using a rotor having a non-round shape that changes sinusoidally with respect to θ and having only a core and no windings, the stator is arranged in the axial direction. A ring-shaped yoke plate having a plurality of protruding cores, and the excitation provided to the ring-shaped yoke plate through the cores at predetermined intervals in the axial direction and wound through a plate-shaped thick portion for winding A plurality of annular winding bobbin plates each having a winding and an output winding; and a plurality of magnetic pole plates provided on the annular winding bobbin plate and connected to the respective cores. Directly opposed to the peripheral surface of the rotor In addition, an excitation winding and an n-phase output winding are provided in a ring-shaped stator, and a gap permeance between the stator and the stator is set at a rotational angle θ. In the variable reluctance resolver type rotation angle detection device using a rotor having only a core and no windings, the stator includes a plurality of cores protruding in the axial direction. A ring-shaped yoke plate, and the excitation winding and the output winding that are provided at predetermined intervals in the axial direction with respect to the ring-shaped yoke plate via the cores and wound through a plate-shaped thick portion for winding. A plurality of ring-shaped winding bobbin plates having a ring-shaped wave-shaped change surface that is formed on one end surface of the rotor and has a wave-like uneven shape along the axial direction. The structure facing the tip of the core It is.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a rotation angle detection device according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
In FIG. 1, what is indicated by reference numeral 1 is a substantially cylindrical stator, and with respect to a plurality of cores (eight in FIG. 1) of the ring-shaped yoke plate 20 of the stator 1, As shown in FIG. 2, bobbin 10A composed of six ring-shaped winding bobbin plates 10, 10a, 10b, 10c, 10d, and 10e having substantially the same diameter as the ring-shaped yoke plate 20 is laminated in the axial direction, or The core 14 is integrally manufactured, and the core 14 passes through each guide hole 30 of each of the bobbin plates 10 to 10e for ring winding.
[0007]
As shown in the perspective view of FIG. 3, on one surface of each of the ring-shaped winding bobbin plates 10 to 10e is a plate-like square or ellipse (non-true circle such as other squares) protruding along the axial direction. The winding plate-shaped thick portion 31 is formed so as to protrude, and the winding plate-shaped thick portion 31 is formed on each of the ring-shaped winding bobbin plates 10 to 10e as shown in FIG. The interval is set to a predetermined interval.
A winding (not shown) is wound around the outer peripheral surface 32 of each of the winding plate-like thick portions 31. Since the outer peripheral surface 32 is located outside the guide hole 30, that is, the core 14, as shown in FIG. It is comprised so that a large winding can be achieved.
[0008]
Excitation windings 4 and 4 'are wound around the annular winding bobbin plates 10 and 10a, and output windings 6 and 6' are wound around the annular winding bobbin plates 10b, 10c, 10d, and 10e. 7, 7 'are wound, and the winding state is as shown in FIG. Therefore, as shown in FIG. 4, the windings 4, 6, and 7 are wound through the outer side and the inner side of each core 14.
[0009]
The stator 1 shown in FIG. 2 is laminated on the ring-shaped yoke plate 20 by using six ring-shaped winding bobbin plates 10 to 10e, but this six-layer type is shown in FIG. A four-layered bobbin plate 10-10c for annular winding and an annular yoke plate 20 can also be used.
Although not shown in FIG. 1, as shown in FIG. 7, the core 14 is provided with the magnetic pole plate 3 so that each core 14 penetrates the guide hole 30 of the magnetic pole plate 3. Is engaged.
[0010]
Further, the winding state in the case of 2X (X is a well-known shaft multiple angle) of the excitation windings 4 and 4 ′ and the output windings 6 and 6 ′ and 7 and 7 ′ is configured as shown in FIG. ing.
The structure of the winding is not limited to 2X described above, and may be 1X, 3X,... NX (n is a natural number), as shown in FIG.
In addition, as shown in FIGS. 1 and 4, the rotation angle detection device such as a resolver using the bobbin structure according to the present invention is fixed using a rotor 50 that is non-circular and includes only an iron core and has no windings. A variable reluctance resolver system that changes sinusoidally, such as sin θ when the gap permeance with the child 1 is a known 1X with respect to the rotation angle θ, and sin 2θ when it is 2X, is configured. Has been.
[0011]
An inner end 3a of each magnetic pole plate 3 provided on the end face of the ring-shaped winding bobbin plate 10 is provided in the stator 1 so as to be rotatable, and directly faces a peripheral surface 50a of a non-round rotor 50. ing.
Therefore, as is well known, when the rotor 50 made of a magnetic material rotates with an excitation signal applied to the excitation winding 4, it changes in a sine wave shape with respect to the gap permeance rotation angle θ, and in response to this change. The rotation angle signal (resolver signal) obtained from the output terminals S1 to S4 of each output winding.
[0012]
Next, the configuration shown in FIG. 8 to FIG. 10 shows another form of FIG. 1, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. Only the different parts will be described. To do.
That is, each core 14 provided on the ring-shaped yoke plate 20 projects from the end surface of the ring-shaped winding bobbin plate 10, and the ring-shaped rotor 50 is rotatably disposed in a state of facing the tip surface 40 of each core 14. Has been.
[0013]
On one end surface 50b of the rotor 50 on the side facing each front end surface 40, a ring-shaped wave-like change surface 60 is formed that changes in a wavy shape along the axial direction.
The annular wave-like change surface 60 is configured such that the thickness changes with respect to each of the tip surfaces 40, and the gap permeance changes sinusoidally (sinn θ, n is an integer) with respect to the rotation angle θ. As described above, a variable reluctance resolver type rotation angle detector can be obtained.
[0014]
In FIG. 10, the distance lg between the side surface of the rotor 50 and the tip surface 40 of the core 14 is lg = A−B / (1−Ccosnθ), where A, B, and C are values of 0 <C <1. It becomes.
[0015]
【The invention's effect】
Since the rotation angle detection device according to the present invention is configured as described above, the following effects can be obtained.
That is, a plurality of annular winding bobbin plates are stacked on the annular yoke plate via the winding plate-like thick portion, and the winding is wound around the outer peripheral surface of the winding plate-like thick portion. Since winding of the winding is extremely easy, the winding time can be greatly shortened and automatic winding can be realized, so that productivity can be greatly improved as compared with the prior art. In addition, since the rotor and the magnetic pole plate are opposed to the core, a variable reluctance resolver can be easily obtained.
[Brief description of the drawings]
FIG. 1 is an exploded explanatory view showing a stator of a rotation angle detection device according to the present invention.
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a perspective view showing a part of the bobbin of FIG. 1;
4 is a winding configuration diagram of the bobbin of FIG. 2. FIG.
5 is a winding configuration diagram of FIG. 4. FIG.
6 is another winding configuration diagram of FIG. 5. FIG.
7 is an exploded explanatory view showing the form of FIG. 1. FIG.
8 is an exploded perspective view showing another embodiment of FIG. 1. FIG.
9 is a perspective view showing a main part of FIG.
10 is a cross-sectional configuration diagram of FIG. 8;
FIG. 11 is an explanatory view showing a list of modified examples showing a winding structure in the case of nX of the present invention.
FIG. 12 is an exploded perspective view of a stator of a conventional rotation angle detection device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stator 3a Inner end 4 Magnetic pole winding 6, 7 Output winding 10-10e Bobbin board 14 for ring-shaped windings Core 20 Ring-shaped yoke board 31 Plate-shaped thick part 32 for windings Outer peripheral surface 40 Tip surface 50 Rotor 50a Peripheral surface 50b One end surface 60 Annular wavy change surface

Claims (2)

The ring-shaped stator (1) is provided with an excitation winding (4) and n-phase output windings (6, 7), and is provided so as to be rotatable with respect to the stator (1). Rotational angle detection of a variable reluctance resolver system using a rotor (50) with a non-circular shape in which the gap permeance changes sinusoidally with respect to the rotational angle θ and has only an iron core and no windings In the device
The stator (1) includes a ring-shaped yoke plate (20) having a plurality of cores (14) protruding in the axial direction, and the ring-shaped yoke plate (20) via the cores (14) in the axial direction. A plurality of annular winding bobbin plates (10 to 10e) having the excitation winding and the output winding that are provided at predetermined intervals and wound through the winding plate-like thick portion (31); A plurality of annular winding bobbin plates (10) are provided with a magnetic pole plate (3) connected to each of the cores (14), and the inner end (3a) of each magnetic pole plate (3) is the rotor ( 50) A rotation angle detecting device which directly faces the peripheral surface (50a) of 50). The ring-shaped stator (1) is provided with an excitation winding (4) and n-phase output windings (6, 7), and is provided so as to be rotatable with respect to the stator (1). In the rotation angle detection device of the variable reluctance resolver type using the rotor (50) having a configuration in which the gap permeance changes in a sinusoidal shape with respect to the rotation angle θ and does not have a winding only with an iron core,
The stator (1) includes a ring-shaped yoke plate (20) having a plurality of cores (14) protruding in the axial direction, and the ring-shaped yoke plate (20) via the cores (14) in the axial direction. A plurality of annular winding bobbin plates (10 to 10e) having an excitation winding and an output winding, which are provided at predetermined intervals and wound through a winding plate-like thick portion (31). ,
The rotor (50) is formed on one end surface (50b) of the rotor (50), and has a ring-shaped wave-like change surface (60) that is wave-like uneven along the axial direction, and the ring-like wave-like change surface (60) is the core ( 14. A rotation angle detection device characterized by facing the tip surface (40) of 14).

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