JP2010004702A - Resolver stator structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of conventional resolver structured, wherein the outline becomes larger in its radial direction as a whole, since a terminal holder for holding a terminal pin is projected radially from an annular stator core. <P>SOLUTION: This resolver stator structure has a structure such that a plurality of through-holes 13 are provided at intervals in the circumferential direction A of the annular stator core 1, between the internal edge 11 and the external edge 12 of the annular stator core 1, that a cover part 30, which covers the inner perimeter face of the through-hole 13, is provided within each through-hole 13, and that the terminal pins 5 are arranged between the internal edge 11 and the external edge 12, being severally threaded into each through-hole 13, while being electrically insulated with respect to the annular stator core 1 by the cover part 30. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a resolver stator structure, and in particular, by arranging a terminal pin to which an end line of a stator winding is connected between an inner diameter side end and an outer diameter side end of a ring-shaped stator core, The present invention relates to a novel improvement for reducing the outer diameter in the radial direction and reducing the space for attaching the annular stator core to an external device.

  As this type of resolver stator structure conventionally used, for example, a resolver stator structure shown in Patent Document 1 is used. FIG. 5 is a cross-sectional view of a conventional resolver stator structure. In the figure, a laminated ring-shaped stator iron core 1 is provided with a plurality of magnetic poles 10 spaced inward in the circumferential direction as is well known, and a stator winding 2 is provided on each magnetic pole 10. It is wound. The annular stator core 1 is interposed between the annular stator core 1 and the stator winding 2, and the annular stator core 1 and the stator winding 2 are electrically insulated from each other on both surfaces of the annular stator core 1. First and second ring-shaped insulating cover members 3 and 4 are attached.

  The first annular insulating cover member 3 is provided with a terminal holding portion 31 protruding from the annular stator core 1 along the radial direction C. The terminal holding portion 31 is bent in an L shape. The terminal pin 5 is held. One end of the terminal pin 5 is connected to an end line (not shown) of the stator winding 2, and the other end of the terminal pin 5 is connected to a lead wire 9. The lead wire 9 is used for inputting an excitation signal and outputting known resolver signals (sin phase signal: sin θ · sin ωt and cos phase signal: cos θ · sin ωt) according to the rotation of the rotor.

JP 2008-118808 A

  In the conventional resolver stator structure as described above, since the terminal holding portion 31 for holding the terminal pin 5 protrudes from the annular stator core 1 along the radial direction C, the overall outer shape is in the radial direction C. When the ring-shaped stator core 1 is attached to an external device, a space larger than the outer diameter of the ring-shaped stator core 1 is required.

  The present invention has been made in order to solve the above-described problems, and the object thereof is to reduce the overall outer shape in the radial direction and to reduce the space for attaching the annular stator core to an external device. It is to provide a resolver stator structure.

In the resolver stator structure according to the present invention, a stator winding is wound around a plurality of magnetic poles of the annular stator core via first and second annular insulating cover members, and a plurality of end lines of the stator winding are provided. In the resolver stator structure connected to the terminal pin, a plurality of the stator-shaped stator cores provided between the inner-diameter side end and the outer-diameter side end of the annular stator core and spaced apart from each other in the circumferential direction of the annular stator core A through hole, and a cover portion provided in at least one of the first and second annular insulating cover members and disposed in each through hole and covering an inner peripheral surface of the through hole, and the terminal pin The cover portion is inserted through the through holes in a state of being electrically insulated from the ring-shaped stator iron core, and is disposed between the inner diameter side end portion and the outer diameter side end portion.
The terminal pin includes an excitation input pin, a sin output pin, and a cos output pin. The excitation input pin, the sin output pin, and the cos output pin are The annular stator iron cores are arranged at intervals of 120 ° in the circumferential direction.
Further, the excitation input pin, the sin output pin, and the cos output pin are directly connected to a terminal portion of the substrate that is arranged at an interval in the axial direction with respect to the annular stator core.

According to the resolver stator structure of the present invention, the terminal pin to which the end line of the stator winding is connected is arranged between the inner diameter side end portion and the outer diameter side end portion of the ring-shaped stator core. The size can be reduced in the radial direction, and the space for attaching the annular stator core to the external device can be reduced.
In addition, the excitation input pin, the sin output pin, and the cos output pin are arranged at intervals of 120 ° in the circumferential direction of the annular stator core, so that the end lines of the excitation input, the sin output, and the cos output Can be easily organized and wiring can be simplified.
Furthermore, one end of the excitation input pin, the sin output pin, and the cos output pin is directly connected to a terminal portion of a substrate that is arranged in an axial direction with respect to the annular stator core. Therefore, the lead wire connecting each pin and the substrate can be omitted, and the cost can be reduced.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a front view showing a resolver stator structure according to Embodiment 1 of the present invention, FIG. 2 is a rear view showing the resolver stator structure of FIG. 1, and FIG. 3 is a cross section taken along line III-III of FIG. FIG. 4 is a cross-sectional view showing the periphery of the terminal pin of FIG.
As shown in FIGS. 1 to 3, the laminated ring-shaped stator iron core 1 is provided with a plurality of magnetic poles 10 spaced inward in the circumferential direction, and each magnetic pole 10 has a stator winding. Wire 2 is wound. The ring-shaped stator iron core 1 is interposed between the ring-shaped stator iron core 1 and the stator winding 2 and electrically insulates the ring-shaped stator iron core 1 and the stator coil 2 from each other on both sides of the ring-shaped stator iron core 1. An annular insulating cover member 3 (see FIG. 1) and a second annular insulating cover member 4 (see FIG. 2) are provided. The first and second annular insulating cover members 3 and 4 are integrally provided with each other by known insert molding. The first and second annular insulating cover members 3 and 4 may be provided separately from each other and assembled so as to sandwich the annular stator core 1 from both the front and back surfaces of the annular stator core 1.

  Between the inner diameter side end portion 11 and the outer diameter side end portion 12 of the annular stator core 1, a plurality of through holes 13 are provided at intervals in the circumferential direction A. As shown in FIG. 4, the first and second annular insulating cover members 3 and 4 are integrally provided with a cover portion 30 disposed in each through-hole 13. The inner peripheral surface 13a of each through hole 13 is covered. Linear terminal pins 5 are respectively inserted into the through holes 13 while being electrically insulated from the annular stator core 1 by the cover portion 30. That is, as shown in FIGS. 1 and 2, a plurality of terminal pins are spaced apart from each other in the circumferential direction A between the inner diameter side end portion 11 and the outer diameter side end portion 12 of the annular stator core 1. 5 is provided. In other words, unlike the conventional device (see FIG. 5), the terminal holding portion 31 for holding the terminal pin 5 is not projected along the radial direction C from the annular stator core 1.

  As shown in FIG. 1, an end line 2 a of the stator winding 2 is connected to the terminal pin 5. Specifically, the end wire 2a of the stator winding 2 is entangled with the terminal pin 5, and the end wire 2a is coupled to the terminal pin 5 by TIG welding or the like, for example. As shown in FIG. 3, a spherical welded portion 5 a is formed on the first end face 1 a side of the annular stator core 1.

  Next, as shown in FIG. 3, on the second end face 1 b side of the annular stator core 1, an annular substrate 6 is disposed in parallel with the annular stator core 1 at an interval in the axial direction. . One end 5 b of the terminal pin 5 protrudes from the second end surface 1 b of the annular stator core 1 and is directly connected to the terminal portion 60 of the substrate 6. The substrate 6 is provided with a circuit for performing R / D conversion, for example.

  Here, the terminal pin 5 has an excitation input pin 50 for inputting an excitation signal, a sin output pin 51 for outputting a sin phase signal, and a cos output for outputting a cos phase signal. A pin 52 is provided. The excitation input pin 50, the sin output pin 51, and the cos output pin 52 are arranged at 120 ° intervals in the circumferential direction of the annular stator core 1.

In such a resolver stator structure, since the terminal pin 5 to which the end line 2a of the stator winding 2 is connected is disposed between the inner diameter side end portion 11 and the outer diameter side end portion 12 of the annular stator iron core 1, The outer shape can be reduced in the radial direction, and the space for attaching the annular stator core 1 to an external device can be reduced.
That is, unlike the conventional device (see FIG. 5), since the terminal holding portion 31 is not provided, even when the annular stator core 1 is attached to an external device, the external device has a diameter equal to the outer diameter of the annular stator core 1. If the concave portion is provided, the outer diameter side end portion 12 of the ring-shaped stator iron core 1 can be used for an inlay, and the mounting space can be reduced.

In addition, since the excitation input pin 50, the sin output pin 51, and the cos output pin 52 are arranged at intervals of 120 ° in the circumferential direction A of the annular stator core 1, excitation input, sin output, and The end line 2a of the cos output can be easily arranged and wiring can be simplified.
In particular, when the pins 50 to 52 are directly connected to the terminal portion 60 of the substrate 6, the connection between the pins 50 to 52 and the terminal portion 60 can be evenly distributed in the circumferential direction A. Can be prevented from concentrating on some of the pins 50-52.

  Further, one end 5 b of the excitation input pin 50, the sin output pin 51, and the cos output pin 52 is a ring-shaped substrate that is disposed at an interval in the axial direction B with respect to the ring-shaped stator core 1. 6 is directly connected to the terminal portion 60, the lead wires connecting the pins 50 to 52 and the substrate 6 can be omitted, and the cost can be reduced.

It is a front view which shows the resolver stator structure by Embodiment 1 of this invention. It is a rear view which shows the resolver stator structure of FIG. It is sectional drawing which follows the line III-III of FIG. It is sectional drawing which shows the periphery of the terminal pin of FIG. It is sectional drawing of the conventional resolver stator structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ring-shaped stator iron core 10 Magnetic pole 11 Inner diameter side edge part 12 Outer diameter side edge part 13 Through-hole 13a Inner peripheral surface 2 Stator winding 2a End line 3,4 1st and 2nd annular insulation cover member 30 Cover part 5 Terminal pin 50 Excitation input pin 51 sin output pin 52 cos output pin 6 Board 60 Terminal

Claims (3)

A stator winding (2) is wound around the plurality of magnetic poles (10) of the annular stator iron core (1) via first and second annular insulating cover members (3, 4), and the stator winding (2 In the resolver stator structure in which the end line (2a) is connected to the plurality of terminal pins (5),
The annular stator core (1) is provided between an inner diameter side end (11) and an outer diameter side end (12), and spaced apart from each other in the circumferential direction (A) of the annular stator core (1). A plurality of disposed through holes (13);
A cover provided on at least one of the first and second ring-shaped insulating cover members (3, 4) and disposed in each through hole (13) to cover the inner peripheral surface (13a) of the through hole (13). Part (30) and
The terminal pins (5) are respectively inserted into the through holes (13) in a state of being electrically insulated from the ring-shaped stator core (1) by the cover portion (30). The resolver stator structure is arranged between the portion (11) and the outer diameter side end (12). The terminal pin (5) is provided with an excitation input pin (50), a sin output pin (51), and a cos output pin (52).
The excitation input pin (50), the sin output pin (51), and the cos output pin (52) are spaced apart from each other by 120 ° in the circumferential direction (A) of the annular stator core (1). The resolver stator structure according to claim 1, wherein the resolver stator structure is disposed.   One end (5b) of the excitation input pin (50), the sin output pin (51), and the cos output pin (52) is in the axial direction (B) with respect to the annular stator core (1). 3. A resolver stator structure according to claim 2, wherein the resolver stator structure is directly connected to the terminal portions (60) of the substrate (6) arranged at intervals.

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