JPH04138053A - Manufacture of helical armature coil - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an armature winding of a servo motor, and particularly relates to a method of insulating a helical armature coil.

[Prior art] Conventionally, in order to improve the control performance of brushless morphs, smooth armatures have been developed in which armature coils are fixed to the smooth air gap surface of the armature core in the form of a cylindrical shape. A helical armature coil is used. for example,
As disclosed in Japanese Unexamined Patent Publication No. 62-285645 previously filed by the present applicant, the element coils A shown in FIG. Make a total of 3 phases. In this case, one coil is placed in a winding form (not shown).
Wrap the layer in a spiral shape on a flat surface, and attach 2 layers to each end.
Temporarily fix the parts one by one using an adhesive temporary fixing sheet 2. Next, the long sides ll of the element coils l for three phases (U, V, W phases) are aligned and arranged along their edges,
As shown in FIG. 7, it is temporarily fixed using a temporary attachment sheet 2 to form a band coil 3A.

Further, an insulating sheet 4 made of a slightly elastic electrically insulating material with adhesive treatment applied to one side is wrapped around the plate-shaped gauge 5 so that the adhesive side faces outward.

Next, as shown in FIG.
The helical coil 3B is formed by wrapping the band coils in a spiral manner to form a helical coil 3B in which the band coils are fixed to each other by the insulating sheet 4.

Next, the helical coil 3B is extracted from the plate gauge 5 together with the insulating sheet 4, formed into a flat helical armature coil, and wound around a cylindrical winding die as shown in FIG. Form a coil.

[Problem to be solved by the invention] However, in the above configuration, between each phase, in the case of three phases, the U phase,
Since there is no insulating sheet between the phase and W phase,
The only insulation between each phase is the insulation coating applied to the surface of the coil wire. Therefore, although it can withstand the voltage between the coil wires, there is a problem in that the reliability of the insulation between each phase is low in the case of high voltage specifications.

An object of the present invention is to improve the interphase insulation characteristics of an armature coil.

[Means for Solving the Problems] The present invention forms a helical coil by winding a band coil, which is formed integrally by aligning the long sides of a plurality of element coils, around a plate-shaped gauge, In the method for manufacturing a helical armature coil, in which an armature coil is formed by pulling out a helical coil from the gauge, the front and back surfaces of the long sides of adjacent element coils of the strip coil are alternately covered, and the adjacent element coils are This is a method for manufacturing a helical armature coil, in which an insulating sheet is inserted in a weaving manner between the long sides of the band coil, and the band coil is pressed into a plate shape to form a plate-shaped armature coil.

The present invention also provides a method for manufacturing a helical armature coil, in which the plate-shaped armature coil is wound around a cylindrical former to form a cylindrical armature coil.

Further, after alternately covering the front and back surfaces of the long sides of all the adjacent element coils of the band coil, and weaving an insulating sheet between the long sides of all the adjacent element coils, the edge of the band coil is In this method, the helical armature coil is manufactured by folding back the helical armature coil so that the insulating sheet covers one or both of the front and back surfaces of the band coil.

[Function] At the band coil stage, the front and back surfaces of adjacent element coils are alternately covered, and an insulating sheet is woven between adjacent element coils to form interphase insulation, which improves the reliability of the insulation between each phase. is significantly improved.

[Example] The present invention will be described with reference to embodiments shown in the drawings.

FIG. 1 is a plan view of an element coil l showing an embodiment of the present invention, in which the coil is wound in a spiral shape on a flat surface around a winding form (not shown), and a temporary attachment sheet with adhesive at two places on both ends. Temporarily fix by step 2. Next, as shown in FIG. 2, the long sides ll of the element coils 1 for the three phases (U, V, W phases) are aligned along their edges, and temporarily attached using the coil end parts 12. It is temporarily fixed with the sheet 2, and the band coil 3A is formed into a plate.

Next, as shown in FIG. 3, an insulating sheet 4 with adhesive treatment applied to one side is wrapped around the band coil 3A. The horizontal length of the insulating sheet 4 is approximately equal to the length of the long side 11, and the vertical length is It is longer than twice the width of the band coil 3A.

When wrapping the insulation sheet 4, first
covers the surface of the long side 11u from one edge 31 of the band coil 3A, then inserts it between the adjacent long side 11v to cover the back surface of the long side 11v, and then 11w to cover the surface of the long side portion 11w. Next, long side 1
1w and the long side portion 11u to cover the back side of the long side portion 11u, and repeating this operation sequentially, the insulating sheet 4 that covered the back side of the long side portion 1iw is passed through the other edge 32 of the band coil 3, that is, the long side portion. 11w is folded back at the edge and covered over the surface of the band coil 3A to form a band coil 3A in which the element coil 11 and the insulating sheet 4 are integrated.

In this way, the long side 11 of each adjacent element coil l
A band coil 3A is formed in which an insulating sheet is woven between adjacent long sides 11 and alternately covers the front and back surfaces of the coil.

Next, as in the conventional case, as shown in FIG.
is wound spirally around the gauge 5 to form a helical coil 3B. Next, the helical coil 3B is pulled out from the gauge 5 and crushed to form a plate-shaped armature coil 3C.

Further, as in the conventional case, as shown in FIG. 5, the plate-shaped armature coil 3C is wrapped around a cylindrical winding form 7, which is wound around an insulating sheet 6 which has been subjected to one-sided adhesive treatment so that the adhesive side faces outward. The side covered with the insulating sheet 4 is wound outward to form a cylindrical armature coil 3D, which is then molded using a resin mold.

Figure 6 shows a resin-molded cylindrical armature coil 3D inserted and fixed into an armature core S with a smooth inner surface, and an insulating sheet is placed between the armature coil 3D and the armature core S. 8 is inserted, and the layer of the insulating sheet 4 is inserted between the phases in the cylindrical armature coil 3D, between the cylindrical armature coil and the stator, and facing the rotor, as shown by the bold line. formed on the surface.

In this way, since the insulating sheet is woven between each adjacent element coil at the stage of band filling, the reliability of the insulation between each phase is significantly improved.

The vertical length of the insulating sheet 4 is made to be about three times the width of the band coil 3A to cover the front and back sides of the element coil, and after being woven between the layers, the excess insulating sheet is again wrapped around the front and back sides of the element coil. When the back surface is covered, the insulation layer between the cylindrical armature coil and the armature core and on the surface facing the rotor becomes thicker, and the insulation properties are further improved.

When a helical armature coil is applied to a linear motor, the plate armature coil 3C may be fixed to the smooth armature core gap surface of the linear motor using resin or the like.

[Effects of the Invention] As described above, according to the present invention, the insulation between each phase and the armature core can be improved, and a highly reliable large-capacity servo motor can be provided.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an elemental coil of the present invention, Fig. 2 is a plan view of a band coil in the middle of the process, Fig. 3 is a plan view of the band coil, and Figs. 4 and 5 are a plan view of the helical coil in the middle of the process. A plan view, FIG. 6 is a front view of a cylindrical armature coil assembled into an armature, and FIG. 7 is a plan view showing a conventional example in the middle of a process. l... Element coil, 11... Long side part, 3A... Band coil, 3B... Helical coil, 3C... Plate armature coil, 3D... Cylindrical armature coil, 4 .6.
8... Insulating sheet, 5... Gauge, 7... Cylindrical winding cylinder diagram, figure, figure, figure, figure, figure 7.

Claims (1)

[Claims] 1. A band coil formed integrally by aligning the long sides of a plurality of element coils is spirally wound around a plate-shaped gauge to form a helical coil, and a helical coil is formed from the gauge. In the method for manufacturing a helical armature coil in which an armature coil is formed by pulling out a helical armature coil, the front and back surfaces of the long sides of adjacent element coils of the band coil are alternately covered, and the long sides of the adjacent element coils are A method for manufacturing a helical armature coil, comprising inserting an insulating sheet in a weaving manner and pressing the band coil into a plate shape to form a plate-shaped armature coil. 2. The method for manufacturing a helical armature coil according to claim 1, wherein the plate-shaped helical armature coil is wound around a cylindrical former to form a cylindrical armature coil. 3. All adjacent elements of the strip coil After alternately covering the front and back sides of the long sides of the coil and weaving an insulating sheet between the long sides of all the adjacent element coils, fold back from the edge of the band coil and cover the band with the insulating sheet. Claim 1 or 2, wherein the coil covers one or both of the front and back surfaces of the coil.
A method of manufacturing the helical armature coil described.