JPH11252844A - Split coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a winding space factor in comparison with a conventional constitution, when coils are applied to the teeth of a stator in order to reduce the size of a motor and improve the efficiency of the motor. SOLUTION: When coils are applied to respective teeth 28a which are formed continually on the outer circumference of a core 26, 1st and 2nd coils 22a and 22b are applied to the parts near the outer circumference and to the inner parts respectively, and both the coils are connected to each other through compression, soldering, bonding, with a printed wiring board, etc., to be used as single coils 22. The respective coils applied to the respective teeth are connected to each other to form 3-phase armature coils, and an annular yoke part 21 is provided on the outer circumference of the coils.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION There has been a great demand for downsizing and high efficiency of motors, and in order to achieve this, many stators composed of coils wound around each tooth in a concentrated manner have come to be seen. I have. By intensively winding the coil around each tooth, the winding space factor, which is the occupation ratio of the winding in the slot, is improved as compared with the conventional coil, and the axial end of the coil is also reduced. However, the shape of the concentratedly wound coil is limited, and there is a limit in further improving the space factor and reducing the size of the motor. Therefore, with the split coil of the present invention, the space factor is improved more than ever, and the motor is downsized.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show a conventional technique using a stator in which coils are wound around teeth. In the prior art, FIG. 5 shows the entire stator 10 and has an annular yoke portion 2 and a plurality of (six in this example) teeth 8a.
a are interconnected by a minute portion 9a of the tooth tip to form an integral structure. Reference numeral 6 indicates a gap into which the rotor enters. That is, the stator 10 has a two-part structure including the yoke part 2 and the teeth 8a. On the other hand, a coil 12 is formed by winding a winding around the radial outer periphery of a plastic hollow bobbin 16, and the coil 12 is inserted into the circumferential outer periphery of each tooth 8a. Press into the yoke part 2. In addition, 14 is a slot. An AC machine such as a synchronous machine or an induction machine is configured by connecting the windings of the respective coils 12 and supplying a three-phase AC to the coils so as to form a three-phase armature coil.

FIG. 6 shows a stator 10a in which a 4-pole DC field coil 12a is wound around the outer periphery of a tooth 18a. In this example, each tooth 18a is orthogonal to an adjacent tooth 18a, and each tooth 18a is independent. The yoke 2a has a ring shape.
First, the DC field coil 12a is wound using a winding frame or the like,
These DC field coils 12a are connected to the respective teeth 18a.
After that, the teeth 18a are joined to the inner periphery of the yoke 2a. Reference numeral 6 'indicates a gap into which the rotor enters. In this way, by passing a DC current to each coil, a field can be formed and a DC machine can be configured. 24 is a slot. The example shown here is a stator of an inner rotor motor, but does not depend on the type of motor, and also includes a field core or an armature core in which a core is divided and a coil is wound around one tooth including a generator. Has the same configuration.

[0004]

A problem to be solved when an armature or a magnetic field is constituted by the above-described prior art will be described. 1) There are restrictions on the cross-sectional shape of the coil. Each tooth 8a or 1
Coil 12 or 12a wound around 8a
, The cross section of one side of the coil piece is substantially a right triangle, trapezoid, rectangle or square. In order to improve the space factor, it is necessary to secure the maximum coil cross-sectional area while approximating the slot cross-sectional shape by the cross-sectional shape of these one type of coil. 2) The winding space factor cannot be increased. In the case of one type of coil cross-sectional shape as in the prior art, referring to FIG.
It is difficult to approximate the cross-sectional shape of this, and a useless space is generated, and therefore, a high space factor cannot be obtained, and it has been demanded to solve these problems.

[0005]

Means for solving the problems of the present invention are as follows. FIG. 1A is a front view showing the entire configuration, and FIG. 1B is a partially enlarged view showing an enlarged portion of a tooth portion and a yoke portion. As shown in FIG. Has a two-part configuration of a tooth portion and a yoke portion as in the case of the prior art shown in FIG.
Two types of coils are created: a coil that is close to the outside in the radial direction and a coil that is different in cross-section from the inside in the radial direction, and combines the two types of coils thus created one by one. , Place the combined coil on each tooth,
The two types of coils arranged for each tooth are configured as a single type of coil by connecting windings by crimping, soldering, or the like, and the rotor rotates when a three-phase alternating current flows. FIG. 2 shows an example of a four-pole DC field coil. The stator has independent teeth, and the yoke has a ring shape. Two types of coils having different cross-sectional shapes are wound by a bobbin winding or a bobbin as in the conventional example, and fixed so that the coils are not collapsed. The coils 32 are arranged on the respective teeth 38 a and the teeth 38 a are joined to the inner periphery of the yoke 31. FIG. 3A is a front view showing an example in which the rotor is constituted by armature coils, and FIG.
It is an enlarged partial front view which shows the connection of the rotor and the teeth in the outer periphery of a. FIGS. 4A and 4B are a front view in which the rotor is formed of a quadrupole field coil and an enlarged partial front view showing the positional relationship of the teeth 58a at the tips. The present invention
The present invention can be applied to a motor or a generator in which a coil is concentrated and wound around a tooth portion obtained by dividing an iron core.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a front view of a first embodiment of the present invention described in claim 1.
FIG. 1 (B) shows one tooth 28a, its outer yoke portion 21 in the radial direction, and the coil 22 wound around this tooth.
It is the elements on larger scale which expand and show the relationship between 22a and 22b.
That is, as shown in FIGS.
First winds these two types of coils 22a and 22b around the outer periphery of a hollow bobbin 16 'made of plastic,
The bobbins 16 ′ are further inserted into the outer periphery of the teeth 28 a, respectively, and are combined one by one to form one coil 22, which is arranged on the outer periphery of each tooth 28 a, and the teeth 28 are joined to the inner periphery of the yoke 21. It is composed. Reference numeral 26 denotes a gap into which a rotor (not shown) is inserted, and reference numeral 14 'denotes a slot. The rotor rotates by flowing the three-phase alternating current, but the rotor is not shown here.

FIG. 2 shows a second embodiment of the present invention, similar to FIG.
3 shows a joint between one yoke portion 31 and one tooth 38a of a pole direct current field coil. In this embodiment, each tooth 38a of the stator 30 is independent, and the yoke 31 is a ring-shaped yoke. First, two types of coils 32a and 32b having different cross-sectional shapes are wound by a winding frame (not shown), and the coils 32a and 32b are fixed so as not to collapse. Coil 3 close to the radial outer circumference
2a and 32b near the inner circumference are combined one by one, and the combined coil 32 is arranged on the outer circumference in the circumferential direction of each tooth 38a, and these teeth 38a are joined to the inner circumference of the yoke portion 31. . Reference numeral 34 denotes a slot, and reference numeral 36 denotes a gap into which a rotor (not shown) enters. By passing a DC current through each coil, a field is created, and a DC machine can be constructed.

FIG. 3A is a front view of a third embodiment of the present invention, which is described in claim 3, and FIG. 3B is a partially enlarged front view of the outer periphery of a tooth 48a. FIG.
The stator 40 of the present embodiment is configured as follows.
The teeth 48a are coupled to the yoke portion 41 by dovetail grooves 48c, 44 is a slot, and the rotor 40 is constituted by an armature coil. 48d indicates a presence (ant). FIG.
(B) shows an enlarged view of the coupling between the four-pole DC field coils 42a and 42b formed as one coil 42 on the outer periphery of the tooth 48a. 46b shows a bobbin. FIG.
(A) is a front view of what is described in claim 4 as a fourth embodiment of the present invention, and (B) is a partially enlarged front view of an outer peripheral portion of a tooth. The field coil 52 combines two types of coils 52a and 52b having different cross-sectional shapes one by one, and the combined coil 52
This is an example in which a field coil 52 having one each of a and b is disposed around the circumference of each orthogonal tooth 58a in the circumferential direction. Reference numeral 46 in FIG.
Reference numeral 56 in (A) indicates a gap into which a rotor (not shown) enters. FIG. 4B is an enlarged view showing the positional relationship between the coils 52a and 52b formed as one coil 52 around the periphery of the tooth 58a in the circumferential direction. These teeth 58
“a” is located at the center of the smooth sides of the yoke 51 having a substantially square cross section and is connected by a dovetail groove 58c. 58d
Indicates an ant, and 56b indicates a bobbin. In the present invention, the portion to be divided is between each tooth 58a and the yoke portion 51.

[0009]

According to the motor of the present invention, two or more coils are combined and arranged on one tooth, so that the coil cross-section can be made to match the slot shape.
For this reason, the coil cross-sectional area in the slot can be increased. That is, there is an effect of improving the space factor.

[Brief description of the drawings]

FIG. 1A is a front view showing a first embodiment of the present invention, and FIG. 1B is a partially enlarged front view showing an arrangement relationship between teeth and coils.

FIG. 2 is a front view showing a second embodiment of the present invention.

FIG. 3A is a front view showing a third embodiment of the present invention, and FIG. 3B is a partially enlarged front view.

FIG. 4A is a front view showing a fourth embodiment of the present invention, and FIG. 4B is a partially enlarged front view.

FIG. 5 is a front view showing a conventional technique.

FIG. 6 is a front view showing another embodiment of the related art.

[Explanation of symbols]

21: Yoke part 22, 22a, 22b, 32, 32a, 32b, 42,
42a, 42b, 52, 52a, 52b: coil 28a, 38a, 58a: tooth

[Procedure amendment]

[Submission date] April 17, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

FIG. 3A is a front view of a third embodiment of the present invention, which is described in claim 3, and FIG. 3B is a partially enlarged front view of the outer periphery of a tooth 48a. FIG.
The rotor 40 of the present embodiment is configured as follows. The teeth 48a are coupled to the yoke portion 41 by dovetail grooves 48c, 44 is a slot, and the rotor 40 is constituted by an armature coil. 48d indicates a presence (ant). FIG.
(B) shows an enlarged view of the coupling between the four-pole armature coils 42a and 42b formed as one coil 42 on the outer periphery of the tooth 48a. 46b shows a bobbin. FIG.
(A) is a front view of what is described in claim 4 as a fourth embodiment of the present invention, and (B) is a partially enlarged front view of an outer peripheral portion of a tooth. The field coil 52 combines two types of coils 52a and 52b having different cross-sectional shapes one by one, and the combined coil 52
This is an example in which a field coil 52 having one each of a and b is disposed around the circumference of each orthogonal tooth 58a in the circumferential direction. Reference numeral 46 in FIG.
Reference numeral 56 in (A) indicates a gap into which a rotor shaft (not shown) enters. FIG. 4B is an enlarged view showing the positional relationship between the coils 52a and 52b formed as one coil 52 around the periphery of the tooth 58a in the circumferential direction. These teeth 58a are joined by dovetail grooves 58c at the center of the smooth sides of the yoke portion 51 having a substantially square cross section.
58d is an ant and 56b is a bobbin. The stator is not shown. In the present invention, the portion to be divided is between each tooth 58a and the yoke portion 51.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

[Fig. 1]

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

[Fig. 5]

Claims (4)

[Claims] 1. A tooth (28a) continuously formed on an outer periphery of an iron core (26), a coil (22a) wound near a radial outer periphery, and a coil wound radially inward. The coils (22b) are connected to each other by crimping, soldering, bonding, or a printed circuit board to form one coil (22), and the windings of each coil (22) are connected to form a three-phase coil. A split coil which forms an armature coil and is arranged on the inner periphery of an annular yoke (21). 2. The coil according to claim 1, wherein each tooth (38a) is independently disposed instead of said tooth (28a), and is removed after forming a winding around a slot (34). A coil (32a) near the radial outer periphery;
A split coil characterized in that two or more coils (32b) on the radially inner circumferential side are combined and disposed on each tooth (38a). 3. A coil (42a) according to claim 2, wherein each of said teeth (38a) is replaced by a coil (42a) which is located on the same tooth at the center and is close to the radially outer portion. A split coil characterized in that a single coil (42) is formed by crimping, soldering, bonding, or connecting a winding with a coil (42b) by a printed circuit board or the like. 4. A coil according to claim 3, wherein said coil (42) is replaced by a radially outer coil (52).
a) and the radially inner coil (52b)
A divided coil wound as one or more coils and arranged on one tooth (58a).