JPH0522907A - Coil inserting method into magnetic core - Google Patents

Abstract

PURPOSE:To present a coil inserting method into a magnetic core for enabling a coil to be inserted into a core easily and quickly with a handy equipment, and giving no mechanical damage or the like to the coil at the time of the inserting. CONSTITUTION:A magnetic field generating process for generating a magnetic field with a magnetic field generating means 8 in front of the inlet section of the slot 2 of a core 1, an alternating current electrifying process for electrifying alternating current to a coil 3 from an AC power source 9, and an inserting process for inserting the coil 3 into the slot 3 via a blade 4 and a stripper 5, are arranged, and by mutual action between the magnetic field and the alternating current, the coil 3 is oscillated in front of the inlet section of the slot 2 and at the same time, the coil 3 is inserted into the slot 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of inserting a coil into a magnetic iron core, and more particularly to a method of inserting a coil into a slot provided in an iron core of a rotating electric machine or the like. .

[0002]

2. Description of the Related Art Conventionally, when inserting a coil into a slot of an iron core of a rotary electric machine or the like, the coil is inserted by a method shown in FIG. 7 in order to insert the coil easily and quickly. .

FIG. 7 is an explanatory view showing a conventional method of inserting a coil into a magnetic core, and FIG. 8 is a sectional view of a slot portion showing a state in which a coil is inserted into a slot by the conventional method of inserting a coil into a magnetic core.

In the figure, 1 is an iron core of rotating electrical equipment,
Reference numeral 2 is a slot provided in the iron core 1, 3 is a coil which is a bundle of conductive wires to be inserted into the slot 2, and 4 is a slide guide of the coil 3 into the opening of the slot 2 when the coil 3 is inserted into the slot 2. It is a jig (hereinafter referred to as a blade) for protecting the coil 3 from the iron core 1. 5 is coil 3
A stripper, which is a jig for pressing and inserting into the slot 2, is an insulating member for protecting the coil 3 in the slot 2.

Next, a conventional method for inserting a coil into a magnetic iron core will be described with reference to FIG. First, as shown in (a), the coil 3 and the iron core 1 are set on the blade 4. Then, the insertion is started, and the stripper 5 is gradually raised in the direction of the arrow as shown in (b), and the coil 3 is pushed up and inserted into the slot 2. Then, as shown in (c), the insertion is completed when the coil 3 penetrates the slot 2. (D) is a state in which the insertion of the coil 3 into the iron core 1 is completed. 7A is a plan view and a sectional view of the iron core portion, and FIGS. 7B and 7C are sectional views of the iron core portion.
(D) is a perspective view.

In addition to the above, there is a conventional coil insertion method in which the coil 3 is vibrated and inserted in order to enhance the insertability of the coil 3. As a conventional method for inserting a coil into this kind of magnetic iron core, Japanese Patent Laid-Open No. 22357/1982
And Japanese Patent Application Laid-Open No. 56-31355. FIG. 9 is an explanatory view showing another conventional method for inserting a coil into a magnetic iron core. In the figure, the same reference numerals and symbols as in FIG. 7 indicate the same or corresponding components as those of FIG.

In the figure, reference numeral 7 is a vibration generating means for vibrating the stripper 5, and is a device for generating rotational vibration or high frequency vibration. This coil insertion method is similar to FIG.
First, as shown in FIG. 9A, the coil 3 and the iron core 1 are set on the blade 4. Subsequently, as shown in (b), the stripper 5 is gradually raised in the direction of the arrow to start the insertion. At this time, the stripper 5 is raised while vibrating by the vibration generating means 7 and the coil 2 is being vibrated. Push it up and insert it. Then, as shown in (c), the insertion is completed when the coil 3 penetrates the slot 2. (D) is a state in which the insertion of the coil 3 into the iron core 1 is completed. 9A is a plan view and a sectional view of the iron core portion, FIGS. 9B and 9C are sectional views of the iron core portion, and FIG. 9D is a perspective view.

[0008]

In the conventional method of inserting a coil into a magnetic iron core as shown in FIG. 7, when the coils 3 are inserted in a bundle, a portion where the coils 3 intersect with each other is formed. The apparent outer diameter of the bundle was large.
For this reason, when the amount of the coil to be inserted is large, the resistance at the entrance of the slot 2 at the time of inserting the coil 3 increases and the insertion cannot be performed smoothly. Also, due to the phenomenon that the coils 3 crush each other at the intersection of the coils 3,
The insulating coating of the coil 3 sometimes deteriorated.

Therefore, even when the coils 3 are inserted in a bundle, a coil insertion method that can easily insert a certain amount of coils and that does not adversely affect the coils 3 has been desired.

Further, in the conventional coil insertion method into the magnetic iron core as shown in FIG. 9, although the insertability of the coil 3 is improved, in order to vibrate the coil 3, the stripper 5 which is a pressing insertion jig is vibrated. The coil 3 is indirectly vibrated by transmitting this vibration to the coil 3.

As a result, the coil 3 cannot be efficiently vibrated by vibrating to a place where vibration is unnecessary. In addition, since a very large force is repeatedly applied to the stripper 5 by the vibration generating means 7 when it is inserted, there is a problem in terms of strength, and equipment is inevitably large.

Therefore, the present invention is to provide a method for inserting a coil into a magnetic core in which the coil 3 can be easily and quickly inserted with simple equipment and which does not cause mechanical damage to the coil 3 during insertion. It is what

[0013]

According to a first aspect of the present invention, there is provided a method of inserting a coil into a magnetic iron core, wherein a magnetic field is generated in front of an inlet portion of a slot of the iron core, and an alternating current is applied to the coil so that the slot is charged. The coil is inserted.

According to a second aspect of the present invention, there is provided a method for inserting a coil into a magnetic iron core, wherein a jig for slidingly guiding the coil into the opening of the slot of the iron core is coated with a material having a smaller friction coefficient than the jig. Then, the coil is inserted into the slot by utilizing the coating surface of the jig.

[0015]

In the method of inserting a coil into the magnetic iron core according to the present invention, a magnetic field is generated in front of the inlet of the slot of the iron core, an alternating current is passed through the coil, and the coil is inserted into the slot. Therefore, due to the interaction between the magnetic field and the alternating current, the coil is inserted into the slot while vibrating just before the entrance of the slot.

Further, in the method of inserting a coil into the magnetic iron core according to the invention of claim 2, the jig for slidingly guiding the coil to the opening of the slot of the iron core is coated with a material having a friction coefficient smaller than that of the jig. However, since the coil is inserted into the slot by using the coating surface of the jig, the frictional resistance between the coil and the jig is reduced, and the coil slides smoothly on the coating surface of the jig. Inserted in.

[0017]

Embodiments of the present invention will be described below.

<First Embodiment> FIG. 1 is an explanatory view showing a method of inserting a coil into a magnetic core according to a first embodiment of the present invention. In the figure, the same reference numerals and symbols as those of the above-mentioned conventional example indicate the same or corresponding components as those of the above-mentioned conventional example.

In the figure, 8 is a magnetic field generating means for generating a magnetic field in front of the opening of the slot 2 of the iron core 1, and is a means for generating a predetermined magnetic field using a permanent magnet or an electromagnetic coil. Reference numeral 9 is an AC power supply for supplying an alternating current to the coil 3. Other than this, the components are the same as those of the conventional example shown in FIG.

Next, a method of inserting a coil into the magnetic core of this embodiment will be described with reference to FIG. First, as shown in (a), the bundle of coils 3 is set in the gap between the blades 4,
The lead wire extending from the coil 3 is connected to the AC power supply 9 so that an AC current flows through the bundle of the coils 3. In this state, the iron core 1 is set along the blade 4 and the insertion is started. When the insertion is started, as shown in (b), the stripper 5 gradually rises in the arrow direction, and the bundle of coils 3 set on the blade 4 is pushed up into the slot 2. Simultaneously with the start of this insertion, an alternating current is supplied to the bundle of coils 3 from the alternating current power source 9, and a predetermined magnetic field is generated by the magnetic field generating means 8 in front of the opening of the slot 2. Therefore, when the stripper 5 rises, the coil 3 through which the alternating current is flowing passes through the magnetic field near the entrance of the slot 2, and a predetermined electromagnetic force is generated in the coil 3 according to Fleming's left-hand rule, and each coil 3 Vibrates.
Due to this vibration, the coils 3 are aligned and inserted into the slots 2. Also, due to this vibration, the slot 2
The frictional resistance between the blade 4, which is in contact with the bundle of coils 3, the insulating member 6 in the slot 2, and the stripper 5 is also reduced to prevent the deterioration of the coil due to friction and to reduce the coil 3 with a small pressing force. Can be inserted. And
As shown in (c), the insertion is completed when the coil 3 penetrates the slot 2. (D) is a state in which the insertion of the coil 3 into the iron core 1 is completed. 1A is a plan view and a sectional view of the iron core portion, FIGS. 1B and 1C are sectional views of the iron core portion, and FIG. 1D is a perspective view.

As described above, the method of inserting the coil into the magnetic iron core of this embodiment includes a magnetic field generating step of generating a predetermined magnetic field by the magnetic field generating means 8 in front of the entrance of the slot 2 of the iron core 1 of a rotating electric machine or the like. An alternating current energizing step of energizing the coil 3 with an alternating current from an alternating current power source 9 and an inserting step of inserting the coil 3 into the slot 2 via the blade 4 and the stripper 5.

That is, in the method of inserting a coil into the magnetic iron core of this embodiment, a magnetic field is generated in front of the entrance of the slot 2 of the iron core 1, and an alternating current is supplied from the alternating current power source 9 to the coil 3,
The coil 3 is inserted into the slot 2.

Therefore, the coil 3 is inserted into the slot while vibrating by the electromagnetic force generated by the magnetic field and the alternating current. For this reason, even if the coils 3 are inserted in a bundle, the coils 3 are aligned by vibration and the outer diameter of the entire bundle of coils 3 can be reduced. The resistance at the entrance of the slot 2 at the time of insertion is reduced, and the insertion can be performed smoothly. In addition, since the amount of the coil 3 to be inserted into the slot 2 can be increased more than in the conventional case, the space factor of the coil 3 with respect to the slot 2 can be increased. As a result, an efficient rotary electric machine or the like can be obtained, which in turn can promote miniaturization of the rotary electric machine body. Further, since the coils 3 are inserted into the slots 2 in an aligned state, there is no phenomenon that the coils 3 crush each other, and the frictional resistance between the coils 3 and each jig or the like is reduced by vibration. As a result, coil 3
The deterioration of the insulating coating can be prevented, and a highly reliable rotating electric device or the like can be obtained.

In particular, in this embodiment, the coil 3 is not directly vibrated through the stripper 5, but the coil 3 itself is directly vibrated. Therefore, a portion where vibration is not required does not vibrate, and the coil 3 is efficiently vibrated. Can be vibrated. Moreover, by creating a magnetic field near the entrance of the slot 2, the coil 3 can be directly vibrated near the entrance of the slot 2 where the greatest resistance acts when the coil 3 is inserted, so that the coil 3 is crushed. There is no match, and the frictional resistance between the coil 3 and each jig such as the iron core 1 and the stripper 5 can be efficiently reduced. As a result, compared with the case where the vibration generating means 7 as in the conventional case is used, since a large force does not act on each part during the insertion operation, there is no problem in strength and the facility is simple. .

<Second Embodiment> FIG. 2 is an explanatory view showing a method of inserting a coil into a magnetic core according to a second embodiment of the present invention.
FIG. 4 is a sectional view of a slot portion showing a state in which a coil is inserted into a slot by a method for inserting a coil into a magnetic core according to a second embodiment of the present invention. FIG. 4 is a coil according to a second embodiment of the present invention. Shows the blade used for the insertion method,
(A) is a side view, (b) is a cross-sectional view showing a bb section of (a). In the figure, the same reference numerals and symbols as those of the above-mentioned conventional example and the first embodiment indicate the same or corresponding components as those of the above-mentioned conventional example and the first embodiment.

In the figure, 10 is the coil 3 of the blade 4.
Is a coating film provided on the sliding surface,
The blade 4 is coated with a material having a friction coefficient smaller than that of the blade 4. The blade 4 is attached to the opening of the slot 2 in a state as shown in FIG. 2 (D) to prevent the coil 3 from being damaged by the opening of the coil 3.

A method of inserting a coil into the magnetic core of this embodiment will be described with reference to FIG. First, as shown in (A), the bundle of coils 3 is set in the gap of the blade 4, and in this state, the iron core 1 is set along the blade 4 and the insertion is started. When the insertion is started, as shown in (B), the stripper 5 gradually rises in the direction of the arrow and pushes up the bundle of coils 3 set on the blade 4 into the slot 2. At this time, the coil 3 slides along the blade 4 (C).
As shown in FIG. 2A to 2C are cross-sectional views of the iron core portion, and FIG. 2D is an enlarged cross-sectional view of the slot opening showing the aa cross section of FIG.

In this way, the coil 3 slides on the surface of the blade 4 and is inserted into the slot 2 in the order of (A) → (B) → (C) of FIG. The entire coil 3 fits within the slot 2 as shown. At the time of this sliding, the smaller the friction coefficient of the surface of the blade 4,
Since the coil 3 easily slides, the push-up force of the stripper 5 can be small and the coil 3 is not easily damaged. Usually, an enamel conductor (JIS-C-3210) is used for the coil 3, and a lubricant is baked on this surface to reduce the friction coefficient. However, in this embodiment, the coating film 10 having a smaller friction coefficient than that of the blade 4 is provided on the surface of the blade 4 on which the coil 3 slides in order to further improve the sliding during sliding.

Here, the coating film 1 of the blade 4
0 will be described. As a method of forming the coating film 10 for reducing the friction coefficient, a method of reducing the surface roughness of the surface of the blade 4 and finishing it to a mirror surface, and coating a solid lubricating material by closely contacting this surface,
There is a method of applying a liquid lubricant. As an example of the former, as shown in FIG. 4, on the sliding surface of the blade 4 with the coil 3, tetrafluoroethylene, nylon, which has a small friction coefficient,
Alternatively, a polymer material such as silicon is attached to form the coating film 10. Further, fine particles of molybdenum difluoride, carbon powder or the like may be coated and mixed in these. As an example of the latter, for example, as shown in FIG. 5, a mechanism for applying a liquid lubricant to a part of the path along which the blade 4 moves is provided, and a liquid lubricant such as liquid paraffin is applied to form the coating film 10. Form. As described above, the material for forming the coating film 10 is not particularly limited as long as it can reduce the friction coefficient.

FIG. 5 is an explanatory view showing a coating method of a blade used in a method of inserting a coil into a magnetic core according to a second embodiment of the present invention.

In the figure, 11 is a liquid lubricant such as liquid paraffin, and 12 is a felt that sucks up the liquid lubricant 11 by applying a capillary phenomenon. The felt 12 is disposed on the sliding surface of the blade 4 with the coil 3 while being pressed in the middle of the moving path of the blade 4. Therefore, when the blade 4 moves in the Y direction, the liquid lubricant 11 is applied to the surface of the blade 4 via the felt 12.
The coating film 10 is formed. Although the configuration in which the liquid lubricant 11 is applied to the surface of the blade 4 by using the felt 12 is described in the drawing, the liquid lubricant 11 can be applied by applying the capillary phenomenon in addition to this. However, it is not limited to the felt 12. Further, the application method is not limited to the pressing method using the felt 12 or the like, and a spray gun is disposed in the middle of the moving path of the blade 4, and the liquid lubricant 11 is applied to the blade 4 by spraying, or a brush or the like is used. You may make it apply | coat.

Thus, the coating means for the liquid lubricant 11 is provided in the middle of the moving path of the blade 4.
If 0 is formed, the liquid lubricant 11 is automatically applied by the movement of the blade 4, so that the coating film 10 in a constant state can always be maintained.

Further, another application example of using the liquid lubricant 11 will be described. FIG. 6 shows another blade used in the method for inserting a coil into the magnetic iron core according to the second embodiment of the present invention. (A) is a longitudinal sectional view, (b) is a cc line of (a). It is a cross-sectional view showing a cross section.

In the figure, 13 is a fine groove formed in the blade 4, and the fine groove 13 is the coil 3 of the blade 4.
Has reached the sliding surface with. When the liquid lubricant 11 is supplied to the blade 4, the liquid lubricant 11 passes through the narrow groove 13 and reaches the surface of the blade 4. Therefore,
In this state, the coil 3 slides on the surface of the blade 4 to form the coating film 10 on the surface of the blade 4. Further, when the surface of the blade 4 is coated with the liquid lubricant 11, it is impregnated into the fine grooves 13 inside the blade 4, and a predetermined amount of the liquid lubricant 11 is retained in the blade 4, so that the coil 3 is Each time the surface of the blade 4 slides, the coating film 10 is formed on the surface of the blade 4.

Thus, by providing the thin groove 13 in the blade 4 and forming the coating film 10, the supply property of the liquid lubricant 11 to the surface of the blade 4 is improved, and the coating film 10 is always in a constant state. Can be maintained for a long time.

As described above, according to the method of inserting a coil into the magnetic iron core of the present embodiment, the blade 4 that slides and guides the coil 3 into the opening of the slot 2 of the iron core 1 of a rotating electrical machine or the like is more effective than the blade 4. A coating step of forming a coating film 10 by coating a material having a small friction coefficient;
The step of inserting the coil 3 into the slot 2 using the surface of the coating film 10 of the blade 4 is included.

That is, in the method of inserting a coil into the magnetic iron core of this embodiment, the blade 4 for slidingly guiding the coil 3 in the opening of the slot 2 of the iron core 1 is coated with a material having a smaller friction coefficient than the blade 4. The coating 10 is formed, and the coil 3 is inserted into the slot 2 by utilizing the surface of the coating coating 10 of the blade 4.

Therefore, the frictional resistance between the coil 3 and the blade 4 is reduced, and the coil 3 is inserted into the slot 2 while smoothly sliding on the surface of the coating film 10 of the blade 4. Therefore, the slip between the coil 3 and the blade 4 becomes extremely good and the coil 3 and the blade 4 can be inserted with a small pressing force, so that the insertion can be smoothly performed. In addition, since the frictional resistance is reduced, the coil 3 is not damaged at the contact portion with the stripper 5 or the sliding surface with the blade 4, so that the insulation coating of the coil 3 can be prevented from being deteriorated and the reliability of the coil 3 can be improved. It is possible to obtain high rotating electrical equipment and the like. Further, since the amount of the coil 3 to be inserted into the slot 2 can be increased more than in the conventional case, the space factor of the coil 3 with respect to the slot 2 can be increased. As a result, an efficient rotary electric machine or the like can be obtained, which in turn can promote miniaturization of the rotary electric machine body.

By the way, in the above description, the first embodiment and the second embodiment have been described separately, but a method for inserting a coil into a magnetic core combined with the first embodiment and the second embodiment is also possible. Well, in this case, the above-mentioned respective effects can be further promoted. Further, the respective examples of the second embodiment may be combined appropriately.

[0040]

As described above, the method for inserting a coil into the magnetic iron core according to the invention of claim 1 comprises a magnetic field generating step, an AC energizing step, and an inserting step, and the inlet of the slot of the iron core. With a simple structure in which a magnetic field is generated in the iron core, an alternating current is applied to the coil, and the coil is inserted into the slot, the coil vibrates due to the interaction between the magnetic field and the alternating current. Therefore, even if the amount of the coil to be inserted is large, the resistance at the entrance of the slot at the time of inserting the coil is reduced and the insertion can be performed smoothly. Further, since the amount of coil inserted in the slot can be increased, the space factor of the coil in the slot can be increased, and the frictional resistance between the coil and each jig due to vibration can be reduced. Can be prevented from deteriorating.

A method of inserting a coil into a magnetic iron core according to a second aspect of the present invention comprises a coating step and an inserting step, wherein the jig for slidingly guiding the coil to the opening of the slot of the iron core is provided with the above-mentioned fixing method. With a simple structure in which a material having a smaller friction coefficient than the tool is coated and the coil is inserted into the slot using the coating surface of the jig, the frictional resistance between the coil and the jig is reduced, and the coil is cured. Since it is inserted into the slot while sliding smoothly on the coated surface of the tool, the coil can be inserted with a small pressing force and the insertion can be performed smoothly. Further, since the coil is not damaged, deterioration of the insulating coating of the coil can be prevented, and moreover, the amount of coil to be inserted into the slot can be increased, so that the space factor of the coil can be increased.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a method of inserting a coil into a magnetic core which is a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a method of inserting a coil into a magnetic core which is a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a slot portion showing a state in which a coil is inserted into a slot by a method of inserting a coil into a magnetic core according to a second embodiment of the present invention.

FIG. 4 is a side view and a cross-sectional view showing a blade used in a method for inserting a coil into a magnetic iron core, which is a second embodiment of the present invention.

FIG. 5 is an explanatory view showing a coating method of a blade used in a method of inserting a coil into a magnetic iron core, which is a second embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view and a cross-sectional view showing another blade used in the method for inserting a coil into the magnetic iron core according to the second embodiment of the present invention.

FIG. 7 is an explanatory view showing a method for inserting a coil into a conventional magnetic iron core.

FIG. 8 is a sectional view of a slot portion showing a state in which a coil is inserted into a slot by a conventional method for inserting a coil into a magnetic iron core.

FIG. 9 is an explanatory diagram showing another conventional method for inserting a coil into a magnetic iron core.

[Explanation of symbols]

1 iron core 2 slots 3 coils 4 blades 5 strippers 6 Insulation member 7 Vibration generation means 8 Magnetic field generating means 9 AC power supply 10 coating film 11 Liquid lubricant 12 felt 13 narrow groove

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[Procedure amendment]

[Submission date] December 11, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

In the figure, 11 is a liquid lubricant such as liquid paraffin, and 12 is a felt that sucks up the liquid lubricant 11 by applying a capillary phenomenon. The felt 12 is disposed on the sliding surface of the blade 4 with the coil 3 while being pressed in the middle of the moving path of the blade 4. Therefore, when the blade 4 moves in the Y direction, the liquid lubricant 11 is applied to the surface of the blade 4 via the felt 12, and the coating film 10 is formed. Although the configuration in which the liquid lubricant 11 is applied to the surface of the blade 4 by using the felt 12 is described in the drawing, the liquid lubricant 11 can be applied by applying the capillary phenomenon in addition to this. However, it is not limited to the felt 12. Further, the application method is not limited to the pressing method using the felt 12 or the like, and a spray gun is disposed in the middle of the moving path of the blade 4, and the liquid lubricant 11 is applied to the blade 4 by spraying, or a brush or the like is used. You may make it apply | coat.

Claims (2)

[Claims] 1. In front of the inlet of the slot of the iron core,
Coil insertion into a magnetic iron core, comprising: a magnetic field generating step of generating a magnetic field in the iron core; an alternating current applying step of applying an alternating current to the coil; and an inserting step of inserting the coil into the slot. Method. 2. A coating step of coating a jig having a smaller friction coefficient than the jig on a jig for slidingly guiding the coil through the opening of the slot of the iron core, and a coating surface of the jig. And a step of inserting a coil into the slot, the method of inserting the coil into the magnetic core.