JPH0242047Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial Field of Application) The present invention relates to an insulator for a stator coil of a flat rotary electric machine having a gap in the axial direction.

(Prior Art) A conventional stator of a flat rotary electric machine having a gap in the axial direction will be described with reference to FIGS. 1 to 3. In the figure, a U-shaped slot insulator 3 is inserted into a slot 2 cut into one end face of an annular stator core 1, and then the electric wire is wound with a winding machine (not shown) and the formed coil 4 is stored. A wedge 5 is inserted into the opening of the slot 2 to fix the coil 4. Storing the coil 4 in the slot 2 and inserting the wedge 5 into the opening of the slot 2 are generally performed manually, and then the coils of different phases of the inner coil end 4a and the outer coil end 4b formed by storing the coil 4 are removed. Divide 4 with a spatula (not shown). Then, the outer interphase insulator 6 and the inner interphase insulator 7 shown in FIG. 2 are inserted in the direction of the arrow 8 shown in FIG. 3.

(Problem to be solved by the invention) The wedge 5, the outer interphase insulator 6, and the inner interphase insulator 7 are generally made of polyester film, but this material has low frictional resistance with the coil 4 and easily slips. After inserting the outer interphase insulator 6 and the inner interphase insulator 7 into the inner and outer coil ends 4a and 4b in this manner, the inner and outer coil ends 4a and 4b are tied with thread and further formed into a desired shape. Inner and outer coil ends 4
The outer interphase insulator 6 and the inner interphase insulator 7 of a and 4b are shifted. Furthermore, the inner and outer coil ends 4
If the windings a and 4b are not aligned properly, the coils 4 of different phases may come into contact and cause a short circuit between the phases. For these reasons, the quality of the motor deteriorates and reliability suffers.

The present invention solves the above-mentioned drawbacks, and by using wedges and interphase insulators in an integrated manner, it is possible to improve insulation reliability and productivity by creating a flat rotating electrical machine with an axial gap. The purpose is to provide.

[Structure of the idea]

(Means for solving the invention) The invention consists of a slot insulator inserted into a slot cut into one end face of an annular stator core, a coil housed in the slot via the slot insulator, and a coil inserted into the slot through the slot insulator. The wedge made of insulating material and having a U-shaped cross section is inserted into the slot opening to fix An inner interphase insulator is formed of a strip-like material, with one opposing long side being a large arc along the inner diameter of the core and the other side being a small arc not along the inner diameter; and an outer interphase insulator formed of a small circular arc along the diameter and a large circular arc that does not follow the outer diameter on one side, and in a flat rotating electrical machine equipped with these and having a gap in the axial direction, the wedge The inner and outer insulators are formed into a substantially T-shape with one end fixed to each of the interphase insulators, and are integrated, and the ends of the wedges constituting these insulators are attached along two longitudinal sides of the wedges at the tips on the non-fixed side. The side of the lever is provided with an expansion holding piece in which a pair of slits are cut out and expanded toward the bottom of the U-shape, and each of the insulators is placed in a predetermined position, and the opening of the adjacent slot after coil winding is provided. A large arc of the inner interphase insulator or a small arc of the outer interphase insulator is respectively locked in the slits of the wedges inserted into the respective parts, and the expansion holding piece holds the interphase insulator, respectively. The present invention relates to a flat rotating electric machine having a gap in the axial direction.

(Function) By using the inner and outer insulators configured as described above, when the wedge is inserted alternately from the inner and outer diameters of the stator core into the slot opening after coil winding, the The expansion pressing piece presses down each interphase insulator and is latched to the bent portion of the slot insulator inserted into the slot. As a result, there is no movement or falling off of the interphase insulators at the coil ends, improving interphase insulation, and the workability of inserting the next phase coil becomes easier, resulting in improved productivity.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 4 to 7. There are two types of interphase insulators: outer interphase insulator 6 and inner interphase insulator 7. As shown in FIG. 4, the outer interphase insulator 6 is made of polyester film, which is an insulating material, and the other long side of the opposing long side is a small arc 6a along the outer diameter of the stator core 1. , a large arc 6 whose one side does not align with the outer diameter
b, and is approximately arcuate. On the other hand, the material and shape of the inner interphase insulator 7 are the same as those described above, but one long side of the band-shaped opposing long side is a large arc 7b along the inner diameter of the stator core 1, and the other side is a small arc 7b that does not follow the inner diameter. It is formed by a circular arc 7a. Next, the wedge 50 is also made of polyester film and has a U-shaped cross section. A pair of slits 50a are provided along the two longitudinal sides of the wedge 50 in order to cut these sides toward the bottom of the U-shape. An expansion presser piece 50b is formed at one end of 50. Then, the expanding presser piece 50b of the wedge 50 is projected toward the small arc 6a side of the outer interphase insulator 6 on a straight line connecting the center point of the small arc 6a at the longitudinal center of the outer interphase insulator 6 and the center. The wedge 50 and the outer interphase insulator 6 are integrated by bonding and fixing the other end at the center of the outer interphase insulator 6 using dielectric heating or ultrasonic waves, and as shown in FIG. A letter-shaped outer insulator 90 is formed. (This integration may be achieved by cutting the wedge 50 and the outer interphase insulator 6 using a laser and then bonding them together.) On the other hand, the inner insulator 91 inserted from the inner diameter side of the stator core 1 The manufacturing method of the outer insulator 90 is the same as that of the outer insulator 90, except that the expansion holding piece 51b of the wedge 51 is arranged and formed so as to protrude toward the large arc 7b side of the inner interphase insulator 7.

Next, a stator employing the outer and inner insulators 90 and 91 of the present invention will be described with reference to FIGS. 4 to 6. In the figure, slot insulator 3 is housed in slot 2 of stator core 1, and 1
A pole or one phase coil 4 is wound within the slot insulator 3. Next, as shown in FIG. 6, insert the wedge 50 of the outer insulator 90 into the opening of the slot 2 in which the coil 4 is housed, with the expanding presser piece 50b closed from the outer diameter side of the stator core 1 at the beginning. and insert it. Subsequently, the small arc 6a side of the outer interphase insulator 6 is brought into contact with the bent tip of the slot insulator 3 protruding from the slot 2, and the expanding presser piece of the wedge 50 protruding from the laminated end of the stator core 1 is pressed. Expand 50b.

On the other hand, from the inside diameter side of the stator core 1, the wedge 51 integrated with the inner insulator 91 is inserted into the opening of the slot 2 adjacent to the slot 2 into which the wedge 51, which is integrated with the inner insulator 91, was inserted first with the closing expansion presser piece 51b at the beginning. insert it into the section. Then, the small arc 6a of the outer interphase insulator 6, which was previously attached, is engaged and fixed in the slit 51a of the expanded holding piece 51b of the wedge 51 protruding from the laminated end of the stator core 1. At this time, the inner insulator 9
The inner interphase insulator 7 of No. 1 is attached to the lower side of the expansion holding piece 50b of the wedge 50. Next, the coils 4 of the other pole or phase are pressed into the slots 2 on both sides of the above two slots 2 from above the inner and outer interphase insulators 7 and 6 where the inner and outer coil ends 4a and 4b have already been installed. We will deliver the product to you. Then, while inserting the wedges 50 and 51 into the openings of the already housed slots 2, the outer and inner insulators 90 and 91 are laid on the inner and outer diameter sides of the stator core 1. After that, repeat this operation until the coils 4 are stored in all slots 2, and the inner and outer coil ends 4 are
A, 4b and the inner and outer interphase insulators 7, 6, etc. laid between these phases are tightened with strings in order to fix them. Then, a stator is manufactured by performing a predetermined varnish treatment.

Next, the effect of using inner and outer insulators in which each interphase insulator and wedge are integrated will be explained.

Slits 50a provided in wedges 50, 51,
Expanding presser piece 50 expanded by the action of 51a
b, 51b are locked to the bent portion (cow portion) of the slot insulator 3 inserted into the slot 2, and the expansion pressing pieces 50b, 51b press the inner and outer interphase insulators 7, 6, respectively. There is.
Further, the slits 50a and 50b lock the inner and outer interphase insulators 7 and 6. Then, a small arc 6a and a large arc 7b of the inner and outer interphase insulators 7 and 6
are along the outer and inner diameters of the stator core 1, respectively. Due to these synergistic effects, the wedges 50, 51 inserted into the opening of the slot 2 are prevented from moving in the axial and circumferential directions. In addition, since the inner and outer interphase insulators 7 and 6 also do not move in the axial and circumferential directions, the inner and outer coil ends 4a and 4b
The interphase insulators are installed at the specified positions to prevent them from falling off, greatly improving the interphase insulation, and preventing the interphase insulators from floating up, making it easier to insert the next phase coil.

Next, by using the outer and inner insulators 90 and 91 that are integrated in a substantially T-shape, the respective wedges 50 and 51 are in the same direction as the direction of penetration of the slot 2 of the stator core 1, and smoothly enter the opening. inserted. Furthermore, productivity is improved because the inner and outer interphase insulators 7 and 6 can be laid at specified positions on the inner and outer coil ends 4a and 4b simply by inserting the wedges 50 and 51.

In the above embodiment, the interphase insulator and the wedge are fixedly bonded, but there is no difference in operation and effect even if the interphase insulator and the wedge are punched out from a single sheet of insulating material.

[Effect of idea]

As described above, according to the present invention, when the inner and outer interphase insulators and the wedge are used as the inner and outer insulators integrated in a substantially T-shape, the interphase insulators at the coil end do not move or fall off, and the interphase insulation is improved. At the same time, the workability of inserting the next-phase coil becomes easier, which has the effect of improving productivity.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a state in which a coil is housed in a stator core of a conventional axially gap flat rotating electrical machine;
Fig. 2 is a plan view of the interphase insulator shown in Fig. 1, Fig. 3 is a longitudinal side view of Fig. 1, Fig. 4 is a plan view of the outer insulator of the present invention, and Fig. 5 is a front view of Fig. 4. 6 are partially enlarged perspective views of a stator employing the present invention. DESCRIPTION OF SYMBOLS 1... Stator core, 2... Slot, 3... Slot insulator, 4... Coil, 4a... Inner coil end, 4b... Outer coil end, 6... Outer interphase insulator, 6a, 7a... ...Small arc, 7...Inner interphase insulator, 6b, 7b...Large arc, 50,5
1...Wedge, 50a, 51a...Slit,
50b, 51b... Expansion presser piece, 90... Outer insulator, 91... Inner insulator.

Claims (1)

[Scope of utility model registration request] It consists of a slot insulator inserted into a slot cut into one end face of the annular stator core, a coil housed in the slot via this slot insulator, and an insulating material inserted into the slot opening to fix this coil. A wedge having a U-shaped cross section and an interphase insulator inserted between each of the different phase coils of the inner and outer coil ends protruding from the inner and outer diameters of the core are in the form of a band made of an insulating material, and one of the opposing long sides is the core. an inner interphase insulator formed of a large arc along the inner diameter of the core and a small arc whose other side does not run along the inner diameter; In a flat rotating electrical machine equipped with these outer interphase insulators having a gap in the axial direction, one end of the wedge is fixed to each of the interphase insulators to form an outer interphase insulator of approximately T. Inner and outer insulators are formed into a letter shape and integrated, and a pair of slits are formed at the tip of the opposite side of the wedge forming these insulators along two longitudinal sides of the wedge toward the bottom of the U shape. and an expansion presser piece formed with an expanded notch, and each of the insulators is arranged at a predetermined position, and the inner interphase insulation is inserted into the slit of the wedge which is inserted into the opening of the adjacent slot after coil winding. A flat rotary electric machine having a gap in the axial direction, characterized in that the expansion holding piece locks a large arc of an object or a small arc of an outer interphase insulator and presses the interphase insulator.