JP2001054246A - Stator insulation structure in outer rotor type multipole power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve dielectric strength among a plurality of adjacent coils with a simplified structure not requiring troublesome works, by elastically engaging with a stator an insulation member integrating a plurality of insulators respectively provided among a plurality of coils which are mutually provided along the circumference direction of a stator. SOLUTION: An insulation member 601 is formed of a non-conductive material, such as a synthetic resin or the like including for insulators 61 extending in the radial direction of a stator 30, a coupling part 62 formed like an arc in connection in common with the internal ends of such insulators, and an engaging part 63 connected with the center in the circumference direction. The engaging part 63 of the insulation member 601 is coupled elastically with an annular projection 64 of the stator 30. As a result, the dielectric strength between the DC coil 38 and main coil 37 and between various coils 39, 40 can be improved surely with simplified structure, while dispensing with the requirement of troublesome works.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a stator core comprising a plurality of salient poles projecting from the outer periphery of a ring-shaped core base at regular intervals therebetween, a bobbin covering the stator core, and The present invention relates to an insulation structure in which an insulating ability between adjacent coils of a stator is improved in an outer rotor type multipolar generator including a souter constituted by a coil wound around the bobbin at a portion corresponding to a salient pole.

[0002]

2. Description of the Related Art Conventionally, such a stator is disclosed in
It is already known from Japanese Patent No. 3849 or the like, and in this case, a V-shaped air gap that is open outward remains between the coils corresponding to the respective salient poles.

[0003]

When it is desired to improve the dielectric strength between the coils wound around the salient poles adjacent to each other via a bobbin, an insulating member is inserted into a gap formed between the coils. However, at this time, since the gap has a V-shape opened outward,
Simply inserting a sheet-shaped insulating member between adjacent coils causes the insulating member to fall off. In addition, if there are a plurality of places where the insulating member should be inserted, a complicated operation for inserting the insulating member into each place is required, which is troublesome. If the varnish impregnation process is performed on the stator in a state where the insulating member is inserted between the adjacent coils, the insulating member does not drop. However, when the varnish impregnation process is performed, the insulating member is in the gap. If it moves, sufficient dielectric strength cannot be obtained.

The present invention has been made in view of the above circumstances, and in a stator of an outer rotor type multipolar generator, the dielectric strength between a plurality of adjacent coils is improved by a simple structure that does not require a troublesome operation. It is an object of the present invention to provide an insulating structure that can be used.

[0005]

In order to achieve the above object, the present invention provides a stator core comprising a plurality of salient poles projecting from the outer periphery of a ring-shaped core base at equal intervals. In an outer rotor type multipolar generator including a stator composed of a bobbin covering the stator core and a coil wound around the bobbin at a portion corresponding to each of the salient poles, the outer rotor type multipolar generator includes An insulating member integrally having a plurality of insulating portions interposed between a plurality of coils adjacent to the plurality of coils is elastically engaged with the stator.

According to such a configuration, a plurality of insulating portions are interposed between the adjacent coils by resiliently engaging the insulating member with the stator. Can be reliably improved without the need for troublesome work.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

1 to 8 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view of an outer rotor type multipolar generator, and is a sectional view taken along line 1-1 in FIG. FIG. 2 corresponds to FIG.
FIG. 3 is a front view of the stator viewed from the direction of the arrow 2 in FIG.
3 is a rear view of the stator viewed from the direction of arrows 3-3, FIG. 4 is a rear view of the stator with the terminal holder removed, FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 3, and FIG. 7 is a sectional view taken along line 7-7 in FIG. 5, and FIG. 8 is a perspective view showing a state before an insulating member is mounted on the stator.

First, in FIG. 1, a sleeve 22 that partially protrudes into the casing 21 is fixed to a casing 21 of the outer rotor type multipolar generator. The oil seal 25 is coaxially arranged in the sleeve 22 with the oil seal 25 interposed between the sleeve 22 and the sleeve 22. A bowl-shaped rotor yoke 26 is coaxially fastened to the end of the crankshaft 23, a magnet 28 is fixed to the inner periphery of the rotor yoke 26, and a cooling fan 29 is fixed to the rotor yoke 26. .

A stator 30 is fixed to an end of the sleeve 22 with a pair of bolts 31.
The magnet 28 provided in 6 coaxially surrounds the stator 30 so as to form a slight air gap with the stator 30.

Referring also to FIGS. 2 to 5, the stator 3
Numeral 0 is provided with a stator core 32 composed of a plurality of core plates stacked on each other, and the stator core 32 is provided around an outer periphery of a core base 33 formed in a ring shape.
A plurality of, for example, 21 salient poles 34 formed in a substantially T-shape,
34 project from each other at equal intervals.

A large part of the stator core 32 is covered with a bobbin 35 made of synthetic resin. The bobbin 35 exposes a part of each of the ends of the salient poles 34, 34. Thus, the stator core 32 is formed so as to cover both ends in the axial direction.

The core base 33 is spaced at equal intervals in the circumferential direction.
Insertion holes 36, 36 are provided at locations, and bolts 31 for fastening the stator 30 to the sleeve 22 are inserted into the insertion holes 36, 36, respectively.

.. Of the 21 salient poles 34, 34.
Each of the salient poles 34 is wound with a main coil 37 via a bobbin 35, and the two salient poles 34, 3
DC coils 38, 38 are wound around 4 via bobbins 35, respectively, and sub-coils 39 and exciter coils 40 are wound around the remaining salient poles 34 via bobbins 35. In addition, the bobbin 35 is formed integrally with a partition plate portion 41 that partitions the sub coil 39 and the exciter coil 40.

In FIG. 6, six U connected in series
, One end of six V-phase main coils 37 connected in series, one end of six W-phase main coils 37 connected in series, and connected in series. that DC one end of the coil 38 are respectively connected to connection terminals 42 ₂ for external conductors, for U-phase, and for V phase W
The other ends of the phase main coils 37 are commonly connected to the connection terminal 43 as a neutral point. The DC coil 38
The other end of the one end of both ends and the exciter coil 40 of the sub-coil 39 are respectively connected to connection terminals 42 ₁ for external conductors, the other end of the exciter coil 40 is connected to the ground connection terminal 44.

In FIG. 7, a pair of through-holes 35a and 35b penetrating the core base 33 of the stator core 32 across both ends thereof are integrally formed on the bobbin 35 in an arc shape centering on the axis of the stator 30. You.

One of the through-holes 35a has four fitting holes 45 individually corresponding to the four external conductor connection terminals 42 ₁ .
_{, And one} fitting hole 46 corresponding to the connection terminal 43;
The fitting recess 4 for making the four fitting holes 45 ₁ .
7 _1, a recess 54 for exposing the engagement hole 46 is provided.

Each of the fitting holes 45 ₁ has a rectangular cross section that is long in the radial direction of the bobbin 35, and the bobbins 35 are formed at a plurality of locations spaced apart in the circumferential direction of the bobbin 35. Is provided in the through portion 35a so as to open one end on a surface facing the rotor yoke 26. The fitting recess 47 ₁ is provided on the surface of the bobbin 35 facing the casing 21 so that the other ends of the fitting holes 45 ₁ ... Commonly face each other, and is formed in an arc shape. Further, the fitting hole 46 has a rectangular cross section that is long along the radial direction of the bobbin 35.
Are provided in the through portion 35a so as to open one end on the surface of the bobbin 35 facing the rotor yoke 26 at a position where the distance from the center is the same as each of the fitting holes 45 ₁ .
4 is a bobbin 3 that faces the other end of the fitting hole 46.
5 is provided on the surface facing the casing 21.

The other through-hole 35b has four fitting holes 45 individually corresponding to the four external conductor connection terminals 42 ₂ .
₂ ... and the fitting recess 47 ₂ for exposing their fitting hole 45 ₂ ... in common is provided.

Each of the fitting holes 45 ₂ has a rectangular cross section that is long in the radial direction of the bobbin 35, and the bobbins 35 are provided at a plurality of locations spaced apart in the circumferential direction of the bobbin 35. Is provided in the penetrating portion 35b such that one end is opened on a surface facing the rotor yoke 26. The fitting recess 47 ₂ is provided on the surface of the bobbin 35 facing the casing 21 so that the other end of each fitting hole 45 ₂ ... Faces in common, and is formed in an arc shape.

A press-fitting hole 48 having a circular cross section extending between both ends in the axial direction of the core base 33 is provided in the core base 33 of the stator core 32 between the two through portions 35a and 35b.

External conductor connection terminal 4 made of conductive metal
2 _1, 42 ₂ of the part fitted into the fitting hole 45 _1, 45 ₂ are fixed, projecting portion of the bobbin 35 of each external lead wire connection terminals 42 _1, 42 _2, each of the main coils 37 ... and DC output wires 49 extending from the coil 38 ₁ ... (see FIGS. 2 and 5) and DC coil 38, the sub-coils 3
9 and a lead wire 49 extending from the exciter coil 40
₂ (see FIG. 2) is bent toward the bobbin 35 after fusing connection.

The connection terminal 43 made of a conductive metal is
The external lead wire connection terminals 42 _1, 42 have ₂ the same shape, the external lead wire connection terminals 42 _1, 4
Some of the 2 ₂ similarly to the connecting terminal 43 is fitted into the fitting hole 46,
The connection terminal 43 projects from the bobbin 35 after the fusing connection of the lead wires 50 (see FIG. 2) extending from the other ends of the U-phase, V-phase, and W-phase main coils 37. Folded to the side.

Ground connection terminal 44 made of conductive metal
Is pressed into the press-in hole 48 through the bobbin 35,
The protruding portion of the ground connection terminal 44 from the bobbin 35
Lead wire 51 extending from the other end of exciter coil 40
After the fusing connection of FIG. 2 (see FIG. 2), it is bent toward the bobbin 35 side.

The bobbin 35 faces the rotor yoke 26.
Each end hole 45₁…, 45 _Two…, 46 and pressure
A half of the bobbin 35 is inserted between the
A plurality of ribs 52..
Are connected to the connection terminals 42 for external conductors.₁
…, 42_Two..., connection terminal 43 and ground connection terminal 4
Guide machine for bending the protruding part from the bobbin 35 of No. 4
Perform noh.

Referring to FIG. 6 again, external conductor connection terminals 42 ₂ ... Connected to one ends of U-phase, V-phase and W-phase main coils 37.
The external lead wire connection terminal 42 ₂ is connected to the 8 end of,
The external conductors 53 ₂ are individually connected. The external conductors 53 ₁ are respectively connected to the external conductor connection terminals 42 ₁ ... Connected to the other end of the DC coil 38, both ends of the sub coil 39, and one end of the exciter coil 40, respectively.

Female terminals 55 are attached to the ends of the four external conductors 53 _1, and four external conductors 53 _2, respectively. The female terminals 55 of the external conductors 53 ₁ ,
Synthetic resin is held in common to a terminal holder 56 _1, ... external conductors 53 ₂ ... female terminal 55 is held in common in the synthetic resin terminal holder 56 _2.

The terminal holder 56 _1, 56 _2, the stator 3
0 fitting recess 47 ₁ formed on the end surface of the casing 21 side of the bobbin 35 in, 47 ₂ are those respectively removably fitted, their terminal holder 56 _1,
56 ₂ female terminal 64 ... held in, the fitting recess 47 _1, 47 connecting each external conductors are projected in ₂ terminal 4
2 ₁ ..., 42 _{by 2} ... part of are fitted, the connecting terminals 42 ₁ ... for external conductors external conductors 53 ₁ ... are connected, respectively, the external lead wire 53 ₂ to the connecting terminal 42 ₂ ... external conductor
Are connected to each other.

The four external conductors drawn from the terminal holder 56 ₁ 53 ₁ ..., as well as four external conductors 53 ₂ ... is the drawn from the terminal holder 56 _2, as shown in Figure 3, a common synthetic resin It is inserted into the tube 57 and bundled, and pulled out from the casing 21 (see FIG. 1).

Meanwhile, while a DC current flows through the DC coil 38, an AC current flows through the main coil 37, the sub coil 39, and the exciter coil 40. Moreover, the pair of DC coils 38, 38 is composed of the main coil 37, the sub coil 39 and the exciter coil 4.
In order to enhance the insulating ability between the DC coil 38 and the main coil 37 and between the DC coil 38 and the sub coil 39 and the exciter coil 40, an insulating member 60 is attached to the stator 30. ₁ is resiliently engaged.

Referring also to FIG. 8, an insulating member 60 is provided.
₁ includes four insulating portions 61 extending along the radial direction of the stator 30, a connecting portion 62 formed by connecting the inner ends of the insulating portions 61, 61 in common and forming an arc shape,
The connecting portion 62 is integrally formed with an engaging portion 63 connected to the center in the circumferential direction, and is formed of a non-conductive material such as a synthetic resin.

Are formed between one of the pair of DC coils 38, 38 and the main coil 37, between the one DC coil 38 and the sub coil 39 and the exciter coil 40, and a pair of DC coils Between the other one of the sub-coils 39 and the exciter coil 40,
And the other DC coil 38 and main coil 37
Are formed in the shape of a flat plate so as to be disposed between them, and the inner ends of the ends of the insulating portions 61 on the casing 21 side are connected to the connecting portion 62 in common.

On the other hand, on the surface of the bobbin 35 on the casing 21 side, an annular projection 64 is integrally provided on the inner side of each of the coils 37, 38, 39, 40. Is formed in a substantially U-shape so as to be able to resiliently engage with the annular protrusion 64, and is connected to the connecting portion 62.

[0034] The insulating member 60 _1, the annular projection 6
4 is resiliently engaged with the engaging portion 63, and is mounted on the stator 30. In the mounted state, each of the insulating portions 61,
61, between one DC coil 38 and the main coil 37, between one DC coil 38 and the sub coil 39 and the exciter coil 40, between the other DC coil 38 and the sub coil 39 and the exciter coil 40, and It is interposed between the other DC coil 38 and the main coil 37, respectively.

According to the first embodiment, the insulating member 60 ₁
Are resiliently engaged with the annular grain 64 of the stator 30, so that the four insulating portions 61, 61,... Since it is interposed between the coil 38 and the sub coil 39 and the exciter coil 40, between the other DC coil 38 and the sub coil 39 and the exciter coil 40, and between the other DC coil 38 and the main coil 37, a simple structure is provided. And D
Between the C coil 38 and the main coil 37, and DC
Coil 38, subcoil 39 and exciter coil 4
The dielectric strength between 0 and 0 can be reliably improved without the need for complicated work.

9 to 12 show a second embodiment of the present invention. FIG. 9 is a rear view of the stator corresponding to FIG.
10 is a plan view of the insulating member, FIG. 11 is a view as viewed from an arrow 11 in FIG. 10, and FIG. 12 is a perspective view of the insulating member.

[0037] between the DC coil 38 and the main coil 37, and in order to increase the insulating ability between the DC coil 38 and the sub-coils 39 and exciter coil 40, the insulating member 60 ₂ is engaged resiliently engaged with the stator 30 .

[0038] The insulating member 60 _2, four of the insulating part 6
Are integrally formed with a connecting portion 66 formed in an arc shape by connecting the insulating portions 65, 65 in common, and are formed of a non-conductive material such as a synthetic resin.

Each of the insulating portions 65, 65 is provided between one of the pair of DC coils 38, 38 and the main coil 37, between the one DC coil 38 and the sub coil 39 and the exciter coil 40, and a pair of DC coils. Between the other one of the sub-coils 39 and the exciter coil 40,
And the other DC coil 38 and the main coil 37
And the stator 30
Is formed to be curved to one side along the circumferential direction. The connecting portion 66 connects the inner ends of the insulating portions 65, 65... On the casing 21 side in common, and is formed to extend straight in a natural state.

[0040] The insulating member 60 _2, connecting portion 66
Are curved between the DC coil 38 and the main coil 37 while the one insulating part 65, 65.
Coil 38, subcoil 39 and exciter coil 4
0, between the other DC coil 38 and the sub coil 39 and the exciter coil 40, and between the other DC coil 38 and the main coil 37 to be mounted on the stator 30. That is, the stator 3
Are curved to one side in the circumferential direction of 0,
Adjacent coils 38 and 37; insulating member 60 ₂ by contact with the 38, 40 exerts a resilient force is to be engaged stator 30 resiliently engaging.

According to the second embodiment, the same effects as those of the first embodiment can be obtained.

13 to 15 show a third embodiment of the present invention. FIG. 13 is a rear view of the stator corresponding to FIG. 4, and FIG. 14 shows a state before an insulating member is mounted on the stator. FIG. 15 is a perspective view and FIG.

[0043] between the DC coil 38 and the main coil 37, and in order to increase the insulating ability between the DC coil 38 and the sub-coils 39 and exciter coil 40, the insulating member 60 ₃ is engaged resiliently engaged with the stator 30 .

This insulating member 60_ThreeThe four insulating parts 6
7, 67.. And their insulating portions 67, 67.
A connecting portion 68 which is connected to form an arc;
Of the insulating portions 67, 67 at both ends along the circumferential direction of the
And a leg 69 connected to the connecting portion 68₁, 69₁And the rest
The remaining insulating portions 67 are connected to the inner ends of the 67 and the connecting portion 68.
Legs 69_Two, 69_TwoAnd the leg on the side opposite to the connecting portion 68
Part 69₁, 69₁Claws 70 provided one at each end of the
₁, 70₁And the leg 69 on the side opposite to the connecting portion 68 _Two, 6
9_TwoClaws 70 provided in pairs at each end_Two, 70_Two…
And integrated with a non-conductive material such as synthetic resin.
Is done.

Each of the insulating portions 67 is provided between one of the pair of DC coils 38 and the main coil 37, between the one DC coil 38 and the sub coil 39 and the exciter coil 40, and between the pair of DC coils 38 and 38. Between the other one of the sub-coils 39 and the exciter coil 40,
And the other DC coil 38 and the main coil 37
Are formed in the shape of a flat plate so as to be disposed between them, and the inner ends of the ends of the insulating portions 67 on the casing 21 side are connected to the connecting portion 68 in common. Each of the legs 69 ₁ , 69 ₂ is connected to the inner ends of the insulating portions 67, 67 and the connecting portion 68 so as to extend along the axial direction of the stator 30. Further, the claw portion 70 ₁ is
9 ₁ protruded legs 69 ₂ side adjacent the claw portions 70 _2,
70 ₂ protrudes from leg 69 ₂ to both sides.

[0046] The insulating member 60 _3, each of the insulating portions 6
7, 67... To one DC coil 38 and main coil 37
Between the DC coil 38 and the sub coil 39 and the exciter coil 40, between the other DC coil 38 and the sub coil 39 and the exciter coil 40, and between the other DC coil 38 and the main coil 37. while inserting each respective claw portions 70 ₁ ..., 70 ₂ ... the engaged stator 30 resiliently engaging by engaging the end portion of the rotor yoke 26 of the coil 37,38,40, similarly to the above-described embodiments The effect can be achieved.

By the way, as in the reference example shown in FIG.
Between one DC coil 38 and the main coil 37, between one DC coil 38 and the exciter coil 40, between the other DC coil 38 and the exciter coil 40, and between the other DC coil 38 and the main coil 37. Between the DC coil 38 and the main coil 37, and between the DC coil 38 and the sub-coil 39 and the exciter coil 40, can be enhanced. .

The insulating member 71 is formed by folding the center and both ends of a rectangular sheet of insulating paper shown in FIG.
The state shown in FIG. 17C is formed through the state shown in FIG. 17B, and the coils 3 on both sides of the insulating member 71 are formed.
7, and are inserted between the DC coil 38 and the main coil 37 and between the DC coil 38 and the sub-coil 39 and the exciter coil 40, respectively, while being resiliently contacted.

Also according to this reference example, before the varnish impregnation and during the execution of the varnish impregnation process, the insulating members 71 are placed between the DC coil 38 and the main coil 37 and the DC coil 3
8 and the exciter coil 40 while holding D securely.
Between the C coil 38 and the main coil 37, and DC
Coil 38, subcoil 39 and exciter coil 4
The dielectric strength between 0 and 0 can be reliably improved with a simple structure. However, since there are a plurality of places where the insulating member 71 is to be inserted, a complicated operation for inserting the insulating member 71 is required.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible to do.

[0051]

As described above, according to the present invention, a plurality of insulating portions are interposed between adjacent coils by resiliently engaging an insulating member with a stator. The dielectric strength between adjacent coils can be surely improved without the need for complicated work.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an outer rotor type multipolar generator according to a first embodiment, which is a sectional view taken along line 1-1 in FIG. 2;

FIG. 2 is a front view of the stator as viewed from the direction of arrows 2-2 in FIG. 1;

FIG. 3 is a rear view of the stator as viewed from the direction of arrows 3-3 in FIG. 1;

FIG. 4 is a rear view of the stator with the terminal holder removed.

FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 3;

FIG. 6 is a connection circuit diagram of a coil.

FIG. 7 is a sectional view taken along line 7-7 of FIG. 5;

FIG. 8 is a perspective view showing a state before an insulating member is mounted on a stator.

FIG. 9 is a rear view of the stator corresponding to FIG. 4 in the second embodiment.

FIG. 10 is a plan view of an insulating member.

FIG. 11 is a view taken in the direction of arrow 11 in FIG. 10;

FIG. 12 is a perspective view of an insulating member.

FIG. 13 is a rear view of the stator corresponding to FIG. 4 in the third embodiment.

FIG. 14 is a perspective view showing a state before an insulating member is mounted on a stator.

FIG. 15 is an enlarged view of FIG.

FIG. 16 is a rear view of the stator corresponding to FIG. 4 of the reference example.

FIG. 17 is a view sequentially showing a forming process of the insulating member of the reference example.

[Explanation of symbols]

Reference Signs List 30 ... stator 32 ... stator core 33 ... core base 34 ... salient pole 35 ... bobbin 37, 38, 39, 40 ... coil 60 ₁ , 60 ₂ , 60 ₃ ... insulation Member 61, 65, 67 ... insulating part

Claims (1)

[Claims] 1. A stator core (32) comprising a plurality of salient poles (34) projecting at equal intervals from one another on an outer periphery of a ring-shaped core base (33), and the stator core (32).
And a coil (37, 38, 39, 40) wound around the bobbin (35) at portions corresponding to the salient poles (34). In the outer rotor type multipolar generator having
Insulation integrally having a plurality of insulating portions (61, 65, 67) interposed between a plurality of coils (37, 38; 38, 39, 40) adjacent to each other along the circumferential direction of the stator (30). member (60 _1, 60 _2, 60 _3), the insulation structure of a stator in a outer rotor type multi-pole generator characterized in that it is fitted the resilient engaging the stator (30).