JPH10174337A - Motor stator - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a stator having concentrated windings for each pole tooth, a space saving at a winding end portion by improving a degree of adhesion between coils, and
An object of the present invention is to provide an inexpensive stator by rationalizing a binding step of winding end processing. SOLUTION: An end plate 12 which covers the pole teeth of a stator core and insulates the stator core and the winding is provided with an inner peripheral side 12b of a pole tooth portion 12a.
A groove 12d connecting the end plate 12 and the outer peripheral side 12c is provided.
This is a stator in which only the windings or the windings and the winding end processing unit are bound by the insulating thread passed through the groove 12d of the above. The tightness between the coils is improved by binding with the insulating thread passing through the groove. As a result, it is possible to reduce the space required for the winding end portion or the winding end processing section and to reduce the number of winding end processing steps, thereby providing an inexpensive stator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for an electric motor used for various kinds of industrial equipment, and more particularly to a winding process for the stator.

[0002]

2. Description of the Related Art In recent years, in order to meet demands for downsizing, high performance, and low cost of motors, high performance rare earth magnets are used for rotors, and the stator is divided into iron cores for each pole tooth and concentrated winding. The finished finished toothed product is bonded and fixed in an annular shape to increase the winding density and automate the process. The wiring connection process has also been streamlined using printed wiring boards (for example,
See JP-A-5-308742).

The configuration of a conventional stator having a concentrated winding for each pole tooth will be described below with reference to FIGS.

FIG. 3 is an exploded perspective view showing a completed pole tooth product before winding a coil, wherein 21 is a laminated core piece, 21b is a pole tooth of the laminated core piece 21, and 22 is an end plate for insulating the core and the coil. , 23 are insulating thin film members, and 24 is a relay terminal. FIG. 4 is a perspective view of a finished pole tooth product in which a pole tooth portion is wound.
a is a division surface of the laminated core piece 21, and 25 is a coil. FIG. 5 is a perspective view of a stator in which the finished product of FIG. 4 is joined and connected in a ring shape. Reference numeral 26 denotes a printed circuit board on which predetermined wiring is provided in multiple layers.

[0005] The above construction is such that, after laminating iron plates divided in the circumferential direction for each pole tooth unit, the inner and outer diameters are laser-welded in the laminating direction, and the inner surface of the slot of the pole teeth 21b of the laminated iron core piece 21 is insulated. The thin film members 23 are provided on both sides, cover both end surfaces of the laminated core piece 21 in the laminating direction, and the end plate 22 is attached so as to sandwich the laminated core piece 21 and the insulating thin film member 23 therebetween. Next, winding is performed by the coil 25 on the laminated core piece in which the relay terminal 24 of the coil 25 is press-fitted on one side of the end plate 22. The winding start and end of the coil 25 are wound around the relay terminal 24, respectively, and then connected by soldering to obtain a pole tooth completed product. The pole tooth finished product is joined in a ring shape by aligning the divided surfaces 21a of the laminated core pieces 21 in a predetermined number, and the outer peripheral joint portion of the laminated core pieces 21 is fixed by laser welding continuously in the laminating direction. Then, the relay terminal 24 is inserted and soldered and connected to complete the stator.

[0006]

However, in the above-mentioned conventional configuration, when the output of the motor increases, the iron core of the stator also increases, and the coil of the winding becomes thick. The printed circuit board cannot be used because the current density of the conductor pattern on the printed board is insufficient.
Even if it could be used, a printed circuit board with multiple layers of printed wiring was expensive and had a hollow shape, so having a large outer diameter was disadvantageous in terms of cost.

In a configuration (not shown) for connecting without using a printed circuit board, a concentrated winding is formed on a pole tooth portion, and an insulating tube is put on a coil end to perform a predetermined connection. Furthermore, the winding ends of the coil have been tied at a plurality of places with insulating yarns between the crossover wires and the connection portions. At this time, it is difficult to bind the winding end processing section to the winding body (coil) on which high-density winding has been performed with an insulating thread, and it is not possible to suppress the swelling of the winding end processing section. There has been a problem that the height dimension of the line end processing unit becomes large. Further, there is a problem that the winding end processing is complicated and not rationalized, and the number of assembling steps cannot be reduced.

Further, when the coil becomes thicker, it becomes difficult to arrange the windings, and the degree of adhesion between the coils becomes smaller, so that the winding ends become higher, and the coil is electromagnetically vibrated when energized, so that electromagnetic noise may be generated. Was.

The present invention solves the above-mentioned conventional problems. The present invention aims to improve the degree of adhesion between the coils of the stator winding, thereby saving the space of the winding end or the winding end processing section. An object of the present invention is to provide an inexpensive stator by rationalizing a binding step of winding end processing.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an end plate which covers the pole teeth of a stator core and insulates the stator core from the windings. A groove connecting the sides is provided, and only the winding or a winding end processing portion such as a winding and a crossover is bound by an insulating thread passing through the groove of the end plate.

As a result, it is possible to save the space by suppressing the height dimension of the winding end portion or the winding processing portion, and to reduce the number of man-hours of the winding end processing and to rationalize.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the above-mentioned problems, the present invention provides a stator in which concentrated winding is applied to each pole tooth of a stator core. The end plate that insulates the end plate is provided with a groove that connects the inner and outer sides of the pole teeth. It is the stator of the electric motor which united the wire end processing part.

Since the grooves are provided on the end plates, even after concentrated winding on the stator core, the windings are securely bound for each pole tooth by the insulating thread passing through the grooves provided on the end plates. As a result, swelling between the coils can be suppressed. Further, since the winding and the winding end processing section such as the crossover can be securely bound, swelling of the winding end processing section can be suppressed. At the same time, the process of winding end processing (binding work) can be streamlined, and the number of assembly steps can be reduced.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an end plate according to an embodiment of the present invention. In FIG. 1A, reference numeral 12 denotes an inner peripheral side 12b and an outer peripheral side 12c of a pole tooth portion 12a which covers the pole teeth of the stator. Groove 12 to tie
In FIG. 1B, an end plate provided with one d is connected similarly to an inner peripheral side 13b and an outer peripheral side 13c of the pole tooth portion 13a.
An end plate provided with the grooves 13d and 13e, which is made of synthetic resin to ensure insulation between the stator core and the windings. The shape of the end plate, the shape of the groove, and the number of grooves are not particularly limited.

Next, the winding end processing will be described mainly with reference to FIG. In FIG. 2, reference numeral 11 denotes a laminated core piece as a stator core, 12 denotes an end plate, 15 denotes a winding obtained by winding a coil 15a a plurality of times, 17a and 17b denote insulating tubes, 18a and 1
8b and 18c are lead wires, and 19 is an insulating thread. First,
A pole tooth finished product which is concentratedly wound so as to be orthogonal to the groove of the end plate 12 is joined in a ring shape by aligning the divided surfaces 11a of the laminated core piece 11 with a predetermined number, and the outer peripheral joint portion of the laminated core piece 11 is continuously formed in the laminating direction. Or after intermittent laser welding and fixing, coil 1
An insulating tube 17a is put on the end of 5a. Fig. 2 shows the case of 12 pole tooth finished products (4 sets of U, V and W phases in order), and soldering and connecting three winding ends (or winding starts) of adjacent U, V and W phases together. Then, a middle point 16 is formed by covering the insulating tube 17b. The other three pairs are connected in the same way and the midpoint 16
And Next, the four U-phases at the beginning (or end) of the winding are joined together by soldering to the lead wire 18a, and the connection part is covered with an insulating tape to form the U-phase. Similarly, four V-phases and four W-phases are collectively connected to the lead wires 18b and 18c by soldering, and the connection portions are covered with an insulating tape to form V-phases and W-phases.
Further, the lead wires 18a, 18b, 18c are bundled and arranged near the outer periphery of the stator. Up to this point, except for using the end plate 12 having the groove 12d, the configuration and the manufacturing method are the same as those using no conventional printed circuit board.

Here, the coils 15a4
The book is collectively referred to as the transition wire up to the point where the lead wire and the solder connection are made, the connection point where the solder connection is made and the midpoint are referred to as the connection portion, and the connection wire and the connection portion are collectively referred to as the winding end processing portion. I will.

Next, after the insulating thread 19 is passed through the groove 12d of the end plate 12, the winding 15 and the winding end processing section are bound by the insulating thread 19. Similarly, binding processing may be performed for all pole teeth, or binding may be performed at one place, and the number of bindings is not limited.

As described above, since the winding 15 and the winding end processing portion can be securely bound by the insulating yarn 19, swelling of the winding end processing portion of the stator can be suppressed and the winding end processing step can be rationalized. .

It is to be noted that only the windings may be bound with an insulating yarn after the concentrated winding or in a state where the pole tooth finished products are joined in a ring shape, and the degree of adhesion between the coils is improved. Bulging of the part can be suppressed.

Although not shown because of the same configuration,
In the stator made of the finished pole teeth using the end plate 13, first, only the winding is bound through the insulating thread through one groove 13 d of the end plate 13. Next, the winding end processing portion may be bound to the winding by passing another insulating thread through the other groove 13e. In this case, the swelling of both the winding end portion and the winding end processing portion is suppressed. As a result, since the degree of adhesion between the coils 15a is improved, the electromagnetic vibration noise of the windings can also be reduced.

Although the embodiment has been described using a split core, the present invention can also be applied to a non-split stator core in which concentrated winding is difficult. In this case, the end plate that covers the pole teeth may be formed integrally with the stator core or may be a separate structure, and a groove that connects the inner peripheral side and the outer peripheral side of the pole tooth portion that covers the pole teeth may be provided.
Thus, after the concentrated winding is performed on the pole teeth, it is possible to perform the winding end processing in which the swelling of the winding only or the winding and the winding end processing unit is suppressed as described above.

Further, the insulating yarn is not limited to the yarn, and a resin band may be used, and the workability and the banding force can be further improved. It is effective.

[0024]

As is apparent from the above embodiment, according to the present invention, the end plate covering the pole teeth is provided with a groove connecting the inner peripheral side and the outer peripheral side of the end plate, thereby concentrating on each pole tooth. The swelling of the winding end portion or the winding end processing portion of the wound stator winding can be suppressed, and the effect of reducing the number of man-hours of the winding end processing and reducing the electromagnetic vibration noise can be obtained.

[Brief description of the drawings]

FIG. 1A is a perspective view of an end plate according to an embodiment of the present invention. FIG. 1B is a perspective view of an end plate according to an embodiment of the present invention.

FIG. 2A is a plan view illustrating a winding end process of a stator according to an embodiment of the present invention. FIG. 2B is a perspective view of the same pole tooth portion.

FIG. 3 is an exploded perspective view showing a state before winding a coil of a conventional finished pole tooth.

FIG. 4 is a perspective view showing a conventional pole tooth completed product.

FIG. 5 is a perspective view showing a conventional stator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Stator iron core (laminated iron core piece) 12, 13 End plate 12a, 13a Polar tooth part 12b, 13b Inner peripheral side 12c, 13c Outer peripheral side 12d, 13d, 13e Groove 15 Winding 19 Insulating thread

Claims (1)

[Claims] In a stator in which concentrated winding is applied to each pole tooth of a stator core, an end plate which covers the pole teeth of the stator core and insulates the stator core and the winding is provided with an inner periphery of a pole tooth portion. A groove connecting the side and the outer circumference is provided, and with the insulating thread passed through the groove of this end plate, only the winding,
Or, a motor stator in which windings and winding ends such as crossovers are bound.