JPH02214434A - Field device for electric rotary machine - Google Patents

Abstract

PURPOSE:To prevent disturbed winding and to obtain an arranged high density winding in a field device where a plurality of poles are arranged on the inner circumferential face of a cylindrical yoke, by employing an unit member for each pole and applying a winding on the unit member. CONSTITUTION:A bobbin 20 comprises a hollow cylindrical section 21, a first flange section 22 extending from one end of the cylindrical section 21, and jointed to the inner circumferential face 10a of a yoke 10, and a second flange section 24 extending outward from the other end of the cylindrical section 21. The bobbin 20 is made of material having high permeability, and a field coil is formed when copper wire 26 is wound around the cylindrical section 21. Since unit bobbin 20 is employed, a winder nozzle 28 for feeding the copper wire 26 does not interfere with the first and second flange sections 22, 24 resulting in the improvement of winding work efficiency.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a field device for a one-rotation machine.

[Prior Art] In general, a field device for a rotating electric machine has a pole core 2 fixed to the inner peripheral surface of a cylindrical yoke 1, as shown in FIG. Flange 2 protruding from the edge
It is equipped with a. Each pole core 2 is wound with a round steel wire 3 inside the collar 2a to form a field coil and constitute a magnetic pole 4. In order to wind this copper wire 3, it is necessary to wind the round steel wire 3 inside the collar 2a. A plurality of copper wires 3 are wound around the pole core 2 while being fed out in parallel from a nozzle 5 at the tip of a winding machine using a gap A formed by the flange 2a. Therefore, the flange 2
In order to wind the wire within the gap A formed by the fifth
As shown in the figure, the nozzle 5 is forced to wind the wire from outside the gap A, which causes irregular winding, and the copper wire 3 comes off from the flange 2a.

Copper accounts for the entire volume of magnetic pole 4! In order to improve the volume ratio of 3, it is necessary to lengthen the flange 2a to increase the number of turns of the coil and eliminate random winding, etc. However, extending the flange 2a reduces the work space. The objective is to reduce the dimension of the gap A, which is subject to restrictions.

Therefore, the yoke and pole core are separated, a bobbin-shaped member is wound in advance to create a field coil, and this is attached to the inner circumferential surface of the cylindrical yoke using the pole core to create a field that forms each magnetic pole. A magnetic device was proposed, and the present applicant
No. 3-249441 discloses a field device equipped with a resin coil bobbin.

[Problems to be Solved by the Invention] In order to improve the performance of the field device, it is necessary to provide a field coil and a member for attaching the field coil to the yoke for the entire volume of each magnetic pole arranged on the inner peripheral surface of the yoke. It is necessary to increase the proportion of the volume occupied by the magnetic material (hereinafter referred to as space factor).

In order to increase the proportion of the field coil in the space factor, it is necessary to prevent random winding and apply more windings, and more magnetic material is used as the member for attaching the field coil to the yoke. Requires configuration.

[Means for Solving the Problems] The field device of the present invention includes a plurality of magnetic poles arranged on the inner peripheral surface of a cylindrical yoke, and the magnetic poles are connected to a single bobbin that supports a field coil, and a bobbin. The bobbin consists of a single pole core that is attached to the inner peripheral surface of the yoke, and the bobbin has a cylindrical part on the outer periphery around which the copper wire is wound, and a bobbin that extends outward from one end of the cylindrical part and is elastically deformed on the inner peripheral surface of the yoke. The pole core is made of a ferromagnetic material and has a flexible first flange that fits tightly and a second flange that extends outward from the other end of the cylindrical part, and the pole core is inserted into the cylindrical part of the bobbin. Ru. It is made of a ferromagnetic material and has a body and an edge that is in close contact with the second flange of the bobbin, and is equipped with a fixing means, and forms a magnetic pole by fixing a pole core inserted into the bobbin to the inner peripheral surface of the yoke. The basic method is to do so.

The present invention also includes means for coating the surface of the bobbin with which the windings come into contact with an electrically insulating synthetic resin layer, or means for integrally structuring the bobbin and the pole core.

[Function] The magnetic pole of the present invention is constructed separately from the yoke, so when winding copper wire, winding can be performed with the magnetic pole alone, and the winding work efficiency is high. High-density winding is achieved without random winding. In addition, by using as much ferromagnetic material as possible in the components that make up the magnetic pole, it is possible to increase the ratio of the volume of the magnetic material, including the copper wire, to the entire volume of the magnetic pole. Equipment can be easily obtained.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are cross-sectional views of essential parts showing one embodiment of the present invention, in which a magnetic pole 11 constituting a part of a magnetic field device is disposed on the inner circumferential surface 10a of a cylindrical yoke 10. Ru.

In this embodiment, as shown in FIG. 2, the magnetic pole 11 is composed of a bobbin, generally designated by the reference numeral 20, and a pole core, designated by the reference numeral 30. The bobbin 20 has a hollow cylindrical part 21,
A first flange 22 extends outward from one end of the cylindrical portion 21 and is joined to the inner circumferential surface 10a of the yoke 10, and a second flange 24 extends outward from the other end of the cylindrical portion 21. Be prepared. The bobbin 20 is made of a material with high magnetic permeability such as iron, and is used when winding a copper wire 26 around the outer circumference of the cylindrical portion 21 to form a field coil.

Since the bobbin 20 is a single unit, the nozzle 28 of the winding machine that supplies the copper wire 26 does not interfere with the first and second flanges 22, 24, and the winding work efficiency is high. When making a wire, the copper wire 26 is regulated laterally by the first and second flanges 22.24 and aligned, preventing random winding and achieving high density winding.

The first flange 22 of the bobbin 20 is formed to be elastically deformable, and the second flange 24 is formed in a circumferential shape.

A pole core 30 that engages with the bobbin 20 has a body part 31 that is inserted into the cylindrical part 21 of the bobbin 20 and edges 32 that protrude to both sides of the body part 31. The inner circumferential surfaces of the body portion 31 and the edge portion 32 are formed into a circumferential shape corresponding to the outer circumferential shape of an opposing armature (not shown).

A surface 34 of the body portion 31 that faces the inner circumferential surface 10a of the yoke 10
is formed into a circumferential shape, and fixing means 35 are arranged at appropriate positions. As the fixing means 35, appropriate means such as caulking protrusions or screws are selected. The pole core 30 itself is also made of a ferromagnetic material such as iron.

To assemble the magnetic pole 11 of this embodiment, the body 31 of the pole core 30 is inserted into the cylindrical part 21 of the bobbin 20 in the direction of arrow Y, and the entire body is attached to the inner peripheral surface of the yoke 10 using the fixing means 35. It is fixed and becomes the state shown in Figure 1.

The first flange 22 of the bobbin 20 is connected to the inner circumferential surface 1 of the yoke 10.
0a, it is elastically deformed along the inner circumferential surface 10a and comes into close contact with the inner circumferential surface of the yoke 10. At the same time, the second bobbin 20
The flange 24 is also pressed by the edge 32 of the ball core 30, elastically deforms, and comes into close contact with the edge 32. Therefore, the edge 3 of the pole core 30 is attached to the second flange 24 of the bobbin 20.
It is desirable to provide such flexibility that it elastically deforms and comes into close contact with the edge 32 when pressed by the edge 32.

Since the magnetic pole 11 of this embodiment is constructed as described above, the copper wire 26 is wound in an orderly manner with high density around the bobbin 20 made of a ferromagnetic material to form a high-performance magnetic field coil. Since the ball core 30 made of a ferromagnetic material is attached to the yoke 10, a magnetic pole with a high space factor can be constructed. Since the other magnetic poles are configured similarly,
The space factor of the entire field device is improved and improved performance can be achieved.

FIG. 3 shows another embodiment of the invention.

This embodiment is also similar to the first embodiment in that it includes separate bobbins and ball cores that constitute magnetic poles.

The bobbin 40 has a cylindrical portion 41. A first flange portion 42 extending outward from one end of the cylindrical portion 41 and joining to the inner circumferential surface of the yoke. and a second collar portion 44 extending outward from the other end of the cylindrical portion 41
It is made of ferromagnetic material such as iron.

In this bobbin 40, the outer circumferential surface 41a of the cylindrical portion 41 that the winding of the coil comes into contact with, and the inner surface 42a of the first collar portion 42
, and the inner surface 44a of the second flange 44 is coated with a synthetic resin layer. As the synthetic resin for coating, an electrically insulating material is selected to electrically insulate between the copper wire of one winding and the ferromagnetic material portion of the bobbin 40.

Also in this embodiment, since the winding process can be performed on the bobbin 40 as a single unit, it is possible to wind the wire in an orderly manner and with high density to obtain a high-performance coil. Moreover, since the insulation between the winding and the bobbin is perfect, the performance as a field coil is improved.

Coating the bobbin with an insulating material will reduce the space factor, but since the coating is thin and the overall volume is small, the effect on the space factor is negligible and outweighs this effect. The effect of improving the insulation of the magnetic coil is greater.

As in the first embodiment, the bobbin 40 is attached to the inner peripheral surface of the yoke by means of a ball core made of a ferromagnetic material. Therefore, the first flange 42 has the flexibility to be bonded to the inner circumferential surface of the yoke.

Next, FIG. 4 shows still another embodiment of the present invention.

The magnetic pole 50 of this embodiment has an integral structure of a bobbin and a pole core. Bobbin member 5 that also serves as a pole core
1 includes a body 54 on which copper wire is wound, and edges 5 are provided on both sides of the end of the body 54 facing the armature (not shown).
8 extends outward.

This edge portion 58 and the surface of the body portion 54 facing the armature side are formed in a circumferential shape.

An end portion 55 of the body portion 54 facing the yoke side is formed in an arc shape, and a protrusion portion 5B is formed in the center portion. Projection 56
is provided with suitable fixing means 57.

The bobbin member 51 is integrally formed of a ferromagnetic material such as iron.

The plate material 52 made of a ferromagnetic material such as iron has a hole corresponding to the protrusion 56 of the bobbin member 51 at its center, and is fitted into the protrusion 56 with a tight fit. The magnetic pole 50 is constructed by winding copper wire around the member composed of the bobbin member 51 and plate material 52 assembled as described above.

The magnetic field device is configured by attaching this magnetic pole 50 to the inner circumferential surface of the yoke using the fixing means 57, as in the previous embodiment. Therefore, the plate material 52 has flexibility to be bonded to the inner circumferential surface of the yoke.

[Effects of the Invention] As described above, the present invention provides a field device in which a plurality of magnetic poles are arranged on the inner peripheral surface of a cylindrical yoke, in which each magnetic pole is made into a single member, and this single member is A field magnet that achieves orderly and dense winding by preventing random winding and achieving high performance with a high space factor by composing the magnetic pole member on which one winding is applied with a ferromagnetic material. You can get the equipment.

Furthermore, by dividing the members constituting the magnetic pole into a bobbin for winding and a pole core for attaching the bobbin to the yoke, manufacturing of the parts and winding work are facilitated, and the bobbin and pole core are made of ferromagnetic material. The space factor can be improved by

Furthermore, by laminating an insulating synthetic resin coating layer on the surface of the bobbin that comes into contact with the winding, the insulation of the field coil is improved without substantially reducing the space factor. It has effects such as improving performance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a part of the field device of the present invention, Fig. 2 is an explanatory view of parts, Fig. 3 is a sectional view showing another embodiment, and Fig. 4 is a sectional view showing still another embodiment. The sectional view shown in FIG. 5 is an explanatory diagram showing a conventional technique. 10...Yoke, 11...Magnetic pole. 20.40...Bobbin, 21.41...Cylindrical part. 22.42...First collar part, 24.44...Second collar part, 26...Copper wire, 28.
...Winding machine nozzle. 30... Pole core, 31, 54... Torso,
32.58... Edge, 35, 57... Fixing means, 41a, 42a, 44a... Synthetic resin coating, 52... Plate material. Figure 1 Figure 2 Patent applicant: Nippondenso Co., Ltd. Agent
Patent Attorney Masaaki Bensue (2 others)

Claims (3)

[Claims] (1) In a field device for a rotating electric machine that includes a cylindrical yoke and a plurality of magnetic poles, including a field coil attached to the inner circumferential surface of the yoke, the magnetic pole consists of a single bobbin that supports the field coil, and a bobbin. The bobbin consists of a single pole core that is attached to the inner peripheral surface of the yoke, and the bobbin has a cylindrical part on the outer periphery around which the copper wire is wound, and a bobbin that extends outward from one end of the cylindrical part and is elastically deformed on the inner peripheral surface of the yoke. The pole core is made of a ferromagnetic material and has a flexible first flange that fits tightly and a second flange that extends outward from the other end of the cylindrical part, and the pole core is inserted into the cylindrical part of the bobbin. The body is made of a ferromagnetic material and has an edge that is in close contact with the second flange of the bobbin, and is equipped with a fixing means, and the pole core inserted into the bobbin is fixed to the inner circumferential surface of the yoke to secure the magnetic pole. A field device for a rotating electric machine characterized by comprising: (2) In the field device for a rotating electric machine according to claim 1, the outer peripheral surface of the cylindrical portion of the bobbin and the inner surfaces of the first and second collar portions are electrically insulating at least in the portions that contact the windings. A field device for a rotating electrical machine characterized by being coated with a resin layer. (3) In a field device for a rotating electric machine that has a cylindrical yoke and a plurality of magnetic poles that have a field coil attached to the inner circumferential surface of the yoke, the magnetic pole has a body part around which a copper wire is wound around the outer circumference. , a member made of a ferromagnetic material having an edge extending outward from both sides of the end of the body facing the armature, a protrusion formed at the other end of the body, and a fixing means provided on the protrusion; 1. A field device for a rotating electrical machine, comprising: a flexible plate made of a ferromagnetic material that elastically deforms and comes into close contact with the inner circumferential surface of a yoke and has a hole that fits into a protrusion of the yoke.