JP2001251792A - Stator core for rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the production yield of a rotating electric machine, of inner rotor type stator core, and improve coil winding inclose winding and maximizing the claws of respective magnetic poles for narrowing gaps between the respective claws, thus improving the flux distribution characteristics in air gaps. SOLUTION: This stator core for rotating electric machine is formed, by jointing core elements divided into magnetic pole units consisting of a yoke, a magnetic pole, and the claw each other at the yoke to integrally attach the plurality of core elements in a circumferential form.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner stator core of a rotating electric machine, and more particularly to a stator core of a rotating electric machine having a divided structure.

[0002]

2. Description of the Related Art As shown in FIG. 19, an inner type stator core of a conventional rotary electric machine is an integral type in which a yoke 11 and magnetic poles 12 are integrally formed.

In such an integrated stator core, a coil is wound around each magnetic pole 2 while passing a winding jig through a gap d between the claws 13 of each magnetic pole 12.

[0004]

The problem to be solved is that the conventional stator core requires a large steel sheet material for punching a laminated plate because it is of an integral type, and the punched residue is large, resulting in a high yield. Is getting worse.

[0005] In a conventional integrated stator core,
It is necessary to wind the coil around each magnetic pole 12 while passing the jig for winding through the gap d between the claws 13 in each magnetic pole 12, and the workability of winding the coil is poor, and the coil is wound around the magnetic pole 12. There is a problem that it is difficult to wind tightly without a gap and the output efficiency of the rotating electric machine is deteriorated.

Since a relatively wide gap d is required between the claws 13 of the magnetic poles 12 to secure a space for the winding jig to pass through, the magnetic flux distribution characteristics of the air gap become poor, resulting in rotation. There is a problem that the output efficiency of the electric machine is reduced.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a stator core for an inner-type rotating electric machine, which improves the yield of products and improves the workability of coil winding so that coils can be densely wound. In addition, by increasing the claws of each magnetic pole to the maximum and narrowing the gap between the claws, the magnetic flux distribution characteristics of the air gap can be improved, and the output efficiency of the rotating electric machine can be improved. In order to
Core elements divided into magnetic pole units each including a yoke part, a magnetic pole part, and a claw part are connected to each other at a yoke part, so that a plurality of core elements are integrally assembled circumferentially.

In this case, in particular, in the present invention, the core element is arranged by providing a concave groove on one side of the yoke portion of the core element and a split projection fitted on the groove on the other side. In this state, the protrusions on the other side are fitted into the grooves on one side of the yoke portion of each adjacent core element by utilizing the elasticity of the two cracks, so that they can be integrally assembled. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A stator core of a rotating electric machine according to the present invention is divided into core elements 4 in units of magnetic poles comprising a yoke 1, a magnetic pole 2 and a claw 3, as shown in FIG.

The core element 4 is provided with a concave groove 5 on one side of the yoke portion 1 and a split projection 6 fitted to the groove 5 on the other side. Then, in a state where the core elements 4 are arranged, the protrusions 6 on the other side are fitted into the grooves 5 on one side of the yoke portion 1 of each adjacent core element 4 by utilizing the elasticity of the two cracks. They can be connected to each other.

At this time, the groove 5 and the projection 6 are formed in such a relationship that the opening width of the groove 5 is smaller than its internal diameter and the maximum diameter of the projection 6 is larger than the opening width of the groove 5. In a state where the elements 4 are arranged, the two split portions of the projections are pressed into the grooves while being elastically crushed.

Thus, as shown in FIGS. 2 and 3,
In a state where a predetermined number of core elements 4 are circumferentially arranged, a uniform pressure F is applied from the periphery thereof, so that the protrusions on the other side are inserted into the grooves 5 on one side of the yoke portion 1 in each adjacent core element 4. 6 is press-fitted, so that integral assembly as the stator core 7 can be performed at one time.

In this respect, the grooves and the projections are simply arranged such that the opening width of the groove is smaller than the internal diameter thereof, and the maximum diameter of the projection that is not split into two is larger than the opening width of the groove. The work of integrally assembling the stator core 7 is remarkably improved as compared with the case where the formed core elements are press-fitted while being slid one by one from the lateral direction and assembled.

Further, according to the present invention, in the stator core having such a divided structure, before the core elements 4 are integrally assembled, as shown in FIG. A bobbin 8 is attached to the portion 2 and the claw portion 3, and a coil 9 is wound around the bobbin 8.

By employing such a winding means for the coil 9, the coil 9 can be wound with good workability, and can be easily wound densely without any gap. Become.

Also, since it is not necessary to secure a sufficient gap for the winding jig to pass between the claws 3 in a state where the claws 3 are integrally assembled, the claws 3 of the core element 4 are maximally formed. As a result, the magnetic flux distribution characteristics of the air gap are improved.

Therefore, the coil 9 can be wound tightly without any gap, and the magnetic flux distribution characteristics of the air gap can be improved by maximizing the size of the claw portion 3 of the core element 4. The output efficiency of the electric machine is improved, and its size and weight can be effectively reduced.

Further, in the present invention, as shown in FIGS. 5 and 6, a plurality of core elements 4 are integrally mounted on an inner peripheral portion of a stator core 7 in a circumferential shape.
0 is incorporated with its own resiliency so that each tooth meshes with each other, thereby improving the strength of the stator core 7 and the assembling accuracy thereof.

FIGS. 8 and 9 show the structure of the retainer 10. FIG. Each tooth of the retainer 10 faces inward so as not to fall off.

In the present invention, as shown in FIG. 7, a plurality of (here, four) collars 14
By press-fitting the stator core 5, it functions as a dowel pin when the stator core 7 is assembled.

In this case, as shown in FIG. 6, before assembling one of the retainers 10, a hole 1 of the retainer 10 is previously prepared.
The collar 14 is press-fitted into the collar 5 and the retainer 10 is attached to the stator core 7 together with the collar 14.

Further, in the present invention, as shown in FIG. 7, a bus bar 16 for coil connection is mounted on one side of the stator core 7 assembled integrally. The bus bar 16 is attached to a screw hole 17 formed in the retainer 10 with a screw 18.

FIGS. 10 and 11 show the structure of the bus bar 16.

FIGS. 12 to 14 show an assembly in which the retainer 10, the collar 14, and the bus bar 16 are integrally mounted on the stator core 7. FIG.

FIGS. 15 to 1 show the bus bar 16.
7, two sets of terminals 19, 20, and 21 are attached (see FIG. 14). Then, as shown in FIG. 14, the terminals of the coils 9 are connected to the terminals 19 to 21 so that the terminals of the coils 9 are separated from predetermined portions of the bus bar 16 to perform fusing, thereby performing the connection processing of the coils 9.

As described above, by performing the connection processing for each of the terminals 19 to 21 using the bus bar 16, the work efficiency of the connection processing is improved. If a bus bar 16 for three-phase serial connection and a three-phase parallel connection are prepared separately, the bus bar 1
By simply exchanging 6, it is possible to easily deal with the derivation of the three-phase output.

In this regard, when the bus bar 16 is not used, it is necessary to solder the terminals of each coil 9 one by one to the terminal. In addition, a number of crossovers must be passed through the tube in order to provide electrical insulation, which complicates the operation.

[0028]

As described above, the stator core of the rotating electric machine according to the present invention is of an inner type, and the core elements divided into magnetic pole units each comprising a yoke, a magnetic pole and a claw are connected to each other at the yoke. , A plurality of core elements are integrally assembled circumferentially, improving the yield of the product, improving the workability of coil winding, and allowing the coil to be densely wound. By increasing the size of the claws to the maximum and narrowing the gap between the claws, the magnetic flux distribution characteristics of the air gap can be improved and the output efficiency of the rotating electric machine can be improved. I have.

In this case, in particular, in the present invention, the core element is provided by providing a concave groove on one side of the yoke portion of the core element and a split projection fitted into the groove on the other side. In a state in which the protrusions are arranged side by side, the projections on the other side are fitted into the grooves on one side of the yoke portion of each adjacent core element by utilizing the elasticity due to the splitting of the two, so that they can be easily assembled integrally. Has advantages.

[Brief description of the drawings]

FIG. 1 is a front view showing a core element used for a stator core of a rotating electric machine according to the present invention.

FIG. 2 is a front view showing a state in which a plurality of core elements are circumferentially arranged when a core element is integrally assembled by applying pressure from the periphery to form a stator core.

FIG. 3 is a front view showing a stator core of the rotating electric machine according to the present invention, which is formed by integrally assembling a plurality of core elements.

FIG. 4 is a front sectional view showing a state where a coil is wound around a core element according to the present invention via a bobbin.

FIG. 5 is a front view showing a state in which a retainer is attached to the stator core of the present invention.

FIG. 6 is a cross-sectional view showing a state where a retainer and a collar are attached to the stator core of the present invention.

FIG. 7 is a cross-sectional view showing a state where a bus bar is attached to the stator core of the present invention.

FIG. 8 is a front view of a retainer attached to the stator core of the present invention.

FIG. 9 is a side view of the retainer.

FIG. 10 is a front view of a bus bar attached to the stator core of the present invention.

FIG. 11 is a side view of the bus bar.

FIG. 12 is a front view showing an assembly in which a retainer, a collar, and a bus bar are integrally mounted on a stator core according to the present invention.

FIG. 13 is a side view of the assembly.

FIG. 14 is a rear view of the assembly.

FIG. 15 is a front view showing a first terminal attached to a bus bar.

FIG. 16 is a front view showing a second terminal attached to a bus bar.

FIG. 17 is a front view showing a third terminal attached to the bus bar.

FIG. 18 is a front view showing a stator in which connection processing of each coil terminal in a bus bar corresponding to each terminal has been performed.

FIG. 19 is a partially cutaway front view showing a conventional inner type stator core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Yoke part 2 Magnetic pole part 3 Claw part 4 Core element 5 Groove 6 Projection 10 Retainer 14 Collar 16 Bus bar 19 Terminal 20 Terminal 21 Terminal

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 15/095 H02K 15/095 (72) Inventor Shingo Watanabe 1053 Otagaya, Tsurugashima-shi, Saitama Toyo Denso Inside Technical Center Co., Ltd. (72) Inventor Satoshi Yanoi 1053 Otagaya, Tsurugashima-shi, Saitama Toyo Denso Co., Ltd. Technical Center F-term (reference) 5H002 AA01 AB01 AB06 AC03 AC06 AC08 AE07 AE08 5H603 AA09 BB01 BB02 BB13 CA01 CA05 CA10 CB02 CB03 CB04 CB05 CC11 CD01 CD04 CD14 CD21 CE01 EE01 EE06 EE11 EE13 5H604 AA08 BB01 BB03 BB15 CC01 CC05 CC16 PB01 PB02 PB03 QB14 5H615 AA01 BB01 BB14 PP01 PP06 PP07 SS19 SS20

Claims (7)

[Claims] 1. An inner-type stator core, wherein core elements divided into magnetic pole units each comprising a yoke part, a magnetic pole part, and a claw part are connected to each other at a yoke part to integrally form a plurality of core elements in a circumferential shape. The stator core of the rotating electric machine to be assembled to 2. A concave groove is provided on one side of a yoke portion of the core element, and two split projections are provided on the other side to fit into the groove. 2. The rotating electric machine according to claim 1, wherein the projection on the other side is fitted into the groove on one side of the yoke portion of the core element by utilizing the elasticity due to the splitting of the two, and is integrally assembled. Stator core. 3. An opening width of the groove is smaller than an inner diameter thereof.
Grooves and protrusions are formed in such a manner that the maximum diameter of the protrusions is larger than the opening width of the grooves, and the split portions of the protrusions are pressed into the grooves in a state of being elastically crushed. The stator core of a rotating electric machine according to claim 2, wherein: 4. The stator core for a rotating electric machine according to claim 1, wherein retainers are respectively assembled from both sides of a core assembly in which a plurality of core elements are integrally assembled in a circumferential shape. 5. The rotation according to claim 4, wherein the collar is press-fitted into the retainer portion so as to abut against an inner peripheral surface of a core assembly in which a plurality of core elements are integrally assembled in a circumferential shape. Electric motor stator core. 6. A stator core for a rotating electric machine according to claim 1, wherein a bus bar for coil connection is freely attached to a side of a core assembly in which a plurality of core elements are integrally assembled in a circumferential shape. . 7. The stator core according to claim 6, wherein the bus bar for three-phase series connection and the bus bar for three-phase parallel connection can be attached with compatibility.