JPH0622486A - Armature for dynamo-electric machine - Google Patents

Abstract

PURPOSE:To enable a current to be let flow equally to coils connected in parallel in case of increasing current capacity by connecting a plurality of coils in parallel. CONSTITUTION:Coils C are wound by winding severally single coil conductors by specified turns on the salient poles P1, P2, ...of the iron cores of an armature. Each phase of armature windings are constituted by connecting severally wound coils C to a plurality of salient poles equal in phases in parallel through connecting conductors 2-5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature used for a rotating electric machine such as a brushless DC motor, an AC motor, an AC generator or the like.

[0002]

2. Description of the Related Art In an armature of a rotary electric machine such as a brushless DC motor or an AC motor, a coil is wound around each salient pole portion of an armature core having a plurality of salient pole portions, and the salient pole portions are respectively wound. An armature winding is configured by connecting the wound coils to each other. For example, an armature having a three-phase armature winding has a star-shaped multi-pole armature core in which 3n (n is an integer of 2 or more) salient poles are radially projected from an annular yoke portion, 3n coils wound around 3n salient pole portions of the armature core, and the 3n coils are connected so as to form U, V, W three-phase armature windings. .

In this type of armature for a rotating electric machine, it is necessary to increase the conductor cross-sectional area of the coil as the current carrying capacity increases. When the current carrying capacity increases to a certain extent, the coil is wound with a single conductor. Becomes difficult. Therefore, in the conventional armature, a method of increasing the current carrying capacity by winding a plurality of conductors in parallel around each salient pole portion has been adopted.

As an example, a structure of a 12-pole armature which constitutes a stator of a brushless DC motor is shown in a developed view in FIG. 16 and its coil connection is shown in FIG. The armature core 1 of FIG. 16 comprises an annular yoke portion Y and twelve salient pole portions P1 to P12 radially protruding from the yoke portion at equal angular intervals. A pole piece portion is provided facing the magnetic pole of the rotor. In this example, four unit coils C1 to C4 are wound around each salient pole portion, and these unit coils are connected in parallel to each other to form one coil C.

In FIG. 16, unit coils C1 to C are used.
Although 4 are illustrated as being arranged in the radial direction of the armature core, these unit coils are actually wound in four layers so as to be arranged concentrically from the inner side to the outer side. Therefore, in these unit coils, the coil conductor is wound to the outer side, and the total length of the coil conductor is longer.

Reference numerals U, V and W displayed above the salient pole portions P1 to P12 in FIG. 16 indicate that the coils wound around the salient pole portions are U-phase, V-phase and W-phase coils. It is shown that. That is, in the conventional armature, salient pole portions P1, P4, P
A coil C wound around each of 7 and P10 is connected in series to form a U-phase armature winding Au, and salient pole portions P2 and P
A coil C wound around each of 5, P8 and P11 is connected in series to form a V-phase armature winding Av. Further, the coils C respectively wound around the salient pole portions P3, P6, P9 and P12 are connected in series to form a W-phase armature winding Aw. The U, V, and W3 phase armature windings are star-connected, and the neutral point terminal Tn is derived from each neutral point, and the U, V, and W3 phase terminals are connected from the end opposite to the neutral point. Tu, Tv, and Tw have been derived.

[0007]

In the conventional armature, the unit coils C1 to C4 are sequentially wound concentrically from the inner side to the outer side, and the outer side wound unit coil has a longer total length of its coil conductor. Therefore, the resistance values and the inductances of the plurality of unit coils connected in parallel cannot be equalized. Therefore, current cannot be evenly applied to the plurality of unit coils connected in parallel, and the current balance may be deteriorated to prevent the rotating electric machine from exhibiting desired performance.

Further, in the conventional armature, since it is necessary to connect all the coils wound around a large number of salient pole portions with crossovers, the work of connecting the coils is complicated and the manufacturing efficiency is reduced. There was a problem. Further, in the conventional armature, a large number of crossover wires are projected in the axial direction, so that it is inevitable that the axial dimension of the armature becomes long.

An object of the present invention is to provide an armature for a rotating electric machine, which can improve the current balance of parallel coils forming the armature winding of each phase.

Another object of the present invention is to reduce the axial dimension by simplifying the connection structure between the coils, and
An object of the present invention is to provide an armature for a rotating electric machine, which is capable of increasing manufacturing efficiency.

[0011]

DISCLOSURE OF THE INVENTION The present invention provides an armature core formed by radially projecting a large number of salient pole portions from an annular yoke portion, and coils wound around the large number of salient pole portions. The present invention relates to an armature for a rotating electric machine, which comprises:

In the present invention, the coil wound around each salient pole portion of the armature core is formed by winding a single coil conductor for a predetermined number of turns, and each of the plurality of salient pole portions is wound around the salient pole portion. The wound coils are connected in parallel to form one phase armature winding. In this case, a predetermined number of ring-shaped or arc-shaped connection conductors to which the ends of the coils connected in parallel with each other are connected are arranged in the yoke portion of the armature core in a state where the armature core and the central axis line are shared. Then, it is preferable that the coils respectively wound around the plurality of salient pole portions are connected in parallel via the connection conductor.

Also, in the present invention, a plurality of series coil groups are formed by connecting in series coils wound around a plurality of salient pole portions, and the plurality of series coil groups are connected in parallel. By doing so, one-phase armature winding may be configured.

Also in this case, it is preferable that the plurality of series coil groups are connected in parallel via the ring-shaped or arc-shaped connection conductor arranged in the yoke portion of the armature core.

When the armature has three-phase armature windings, an armature core in which 3n (n is an integer of 2 or more) salient poles are radially projected from the annular yoke portion is used. The coils are wound around the 3n salient pole portions of the armature core, and the 3n coils are connected so as to form U-, V-, and W-three-phase armature windings. When the present invention is applied to an armature having a three-phase armature coil as described above, the coil wound around each salient pole portion is a single coil and wound around a plurality of salient pole portions having the same phase. An armature winding for each phase is formed by connecting the turned coils in parallel.

When the present invention is applied to an armature having a three-phase armature coil, a plurality of coil groups each having a plurality of salient pole portions having the same phase and connected in series with each other are wound. Alternatively, the plurality of coil groups may be formed in parallel with each other to form the armature winding of each phase.

When the present invention is applied to an armature in which three-phase armature windings are star-connected, in order to facilitate the connection between the coils, the coils forming the U-phase armature windings are A U-phase connecting conductor to which the terminal portion on the side opposite to the sex point is connected;
Of the V phase connecting conductor to which the terminal portion on the side opposite to the neutral point of the coil constituting the phase armature winding is connected, and on the side opposite to the neutral point of the coil constituting the W phase armature winding. A total of four rings of a W-phase connecting conductor to which the terminal portion is connected and a neutral-point connecting conductor to which the terminal portion on the neutral point side of the coil that constitutes the armature winding of each phase is connected or It is preferable to provide arc-shaped connecting conductors and arrange these connecting conductors in the yoke portion of the armature core in a state where the central axis is shared with the armature core. In this case, for each of the U-phase and W-phase connecting conductors,
Coil to be connected to each connection conductor is provided with a projecting connection piece on the salient pole portion side, and the end portion of the coil forming the armature winding of each phase is connected to a predetermined connection conductor. It is preferably connected to one piece.

When the present invention is applied to an armature in which three-phase armature windings are delta-connected, one end of a coil forming a U-phase armature winding and a coil forming a W-phase armature winding. Connection conductor connected to one end of the coil, and a second connection connected to the other end of the coil forming the U-phase armature winding and one end of the coil forming the V-phase armature winding A total of three rings or circles of a conductor and a third connecting conductor to which the other end of the coil forming the V-phase armature winding and the other end of the coil forming the W-phase armature winding are connected It is preferable to arrange the arc-shaped connecting conductor in the yoke portion of the armature core so as to share the axis with the armature core. Also in this case, each of the U-phase or W-phase connection conductors is provided with a connecting piece protruding toward the salient pole portion around which a coil to be connected to each connection conductor is wound, and the armature winding of each phase is provided. The terminal portion of the coil constituting the above is connected to the connection piece of the predetermined connection conductor.

One of the connection pieces of each connection conductor can be used as an external lead wire connecting terminal, and the external lead wire can be connected to the terminal. In that case, of the plurality of connecting portions that connect the connecting pieces of the respective connecting conductors, it is possible to set the cross-sectional area of the connecting portion having a small energizing current smaller than that of the connecting portion having a large energizing current.

[0020]

As described above, a coil wound around each salient pole portion is used as a single coil, and a coil wound around a plurality of salient pole portions or a coil wound around a plurality of salient pole portions is used. If the current capacity is increased by connecting the series coil groups that are connected in series in parallel, it is possible to equalize the resistance value and the inductance of each of the plurality of coils or coil groups that are connected in parallel. Therefore, the current can be made to flow uniformly through the plurality of coils or coil groups, and the current balance among the plurality of coils or coil groups can be improved.

As described above, a predetermined number of ring-shaped or arc-shaped connection conductors are concentrically arranged, and the terminal end of the coil wound around each salient pole portion is wound around the connection piece of the predetermined connection conductor and soldered. By attaching the wires, it is possible to easily connect the coils. In this case, since a large number of connecting wires do not project in the axial direction of the armature, the size of the armature in the axial direction can be reduced. Further, since it is not necessary to connect a large number of connecting wires, the winding work can be simplified and the manufacturing efficiency of the armature can be improved.

Further, among the connecting portions connecting the connecting pieces of the respective connecting conductors, the cross-sectional area of the connecting portion having a small energizing current is set to be smaller than that of the connecting portion having a large energizing current. Since the axial dimension of the connecting part with a small energizing current can be shortened, it is possible to form a part of the armature with a shorter axial dimension than the other part, and place this part with other parts. It can be used as a space to play.

Even if an annular conductor is used as the connecting conductor,
The arc-shaped one may be used, but when the arc-shaped one is used, a closed circuit is not formed by each connecting conductor (one turn is not formed), and therefore a brushless DC is used.
In a motor or the like, it is possible to prevent a trouble such as heat generation due to a short-circuit current flowing through a connecting conductor of another phase due to a change in magnetic flux that occurs when switching a current flowing through an armature coil of each phase.

[0024]

The present invention is generally applicable to a single-phase or three-phase rotating electric machine armature using a multi-pole armature core. First, n = 4 is set to a 12-pole three-phase brushless DC motor. An embodiment in which the present invention is applied to an armature will be described.

FIG. 1 is a development view showing the winding structure of this embodiment. In FIG. 1, reference numeral 1 is an armature core formed by laminating steel sheets punched into a predetermined shape. This armature core
It is composed of an annular yoke portion Y and twelve salient pole portions P1 to P12 radially protruding from the outer peripheral portion of the yoke portion at equal angular intervals.

In the present invention, by continuously winding a single coil conductor on each of the salient pole portions P1 to P12,
A single coil C is wound around each salient pole portion. In this embodiment, a coil C having a predetermined number of turns is wound around each salient pole portion by concentrically winding a coil of four layers. Coil C
The number of layers of is arbitrary.

The coil C wound around each of the salient pole portions P1, P4, P7 and P10 is connected in parallel to form a U-phase armature winding Au, and the salient pole portions P2, P5, P8 and P are arranged.
The coils C each wound around 11 are connected in parallel to V
The phase armature winding Av is constructed. Also, salient pole P3
, P6, P9, and P12 are connected in parallel to form a W-phase armature winding Aw. The armature windings Au to Aw are three-phase star connected, and a neutral point terminal Tn is drawn from the neutral point, and terminals Tu to Tw are drawn from terminals opposite to the three-phase neutral point, respectively. The wiring diagram of the coil of this embodiment is shown in FIG. A configuration example of a brushless DC motor using the armature of this embodiment is shown in FIGS. 3 (A) and 3 (B).

In the present embodiment, in order to facilitate the connection of the coils C wound around the salient pole portions P1 to P12, the connection conductor 2 for the U phase, the connection conductor 3 for the V phase, and the connection conductor for the W phase are used. The connection conductor 4 and the connection conductor 5 for the neutral point are provided. These connecting conductors are formed in an annular shape or an arc shape and are concentrically arranged in the yoke portion Y of the armature core 1.

4A and 4B show a U-phase connecting conductor 2
In this example, the connection conductor 2 is formed in an annular shape, and four tongue-shaped connection pieces 2a to 2d protruding in the radial direction are equiangular at one end in the axial direction of the connection conductor 2. It is provided at intervals (at intervals of 90 degrees). One of the connecting pieces 2a is also used as a terminal for connecting an external lead wire, and a ring for inserting the lead wire into the end of the connecting piece 2a for soldering. The terminal portion 2a1 having a rectangular shape is formed. The connection conductor 2 is positioned and arranged so that the connection pieces 2a to 2d thereof protrude toward the salient pole portion side of the armature core provided at intervals of 90 degrees. The connection conductor 2 is formed by cutting a pipe made of a good conductive material such as copper to cut and raise the connection pieces 2a to 2d. The V-phase connection conductor 3 and the W-phase connection conductor 4 are formed in the same manner as the U-phase connection conductor except that the diameter and the length of the connection piece are different from those of the U-phase connection conductor. The connection conductors 3 and 4 have connection pieces 3a to 3d and 4a to 4d at equal angular intervals, respectively. The neutral-point connecting conductor 5 is also formed in an annular shape and has a total of twelve connecting pieces 5a to 5l at equal angular intervals.

The inner diameters of the connection conductors 2 to 5 are r2 to r, respectively.
In the case of 5, the respective inner diameters are set so as to have a relationship of r2>r3>r4> r5, and these connecting conductors are arranged concentrically as shown in FIGS. 5 (A) and 5 (B). It is housed in the insulating case 6. Insulation case 6
Is an annular resin molded product having an inner peripheral wall portion 6A, an outer peripheral wall portion 6B and a bottom wall portion 6C, and is connected to an annular recess formed between the peripheral wall portions 6A and 6B of the case. The conductors 2 to 5 are inserted, and the insulator 7 is inserted between the connecting conductors 2 to 5 to insulate the connecting conductors from each other. A flange portion 6D protruding inward in the radial direction is formed on the inner circumference of the end portion of the insulating case 6 on the bottom wall portion side.
3 for removing the mounting hole provided in the armature core.
One notch portion 6E is formed at intervals of 120 degrees.
A mounting hole 6F is also formed in the flange portion 6D. The connection conductors 2 to 5 inserted in the insulating case 6 are fixed in the case 6 by adhesion, casting of resin into the case 6, or the like. The connecting conductors 2 to 5, the insulator 7, and the insulating case 6 constitute a connecting device for connecting the coils to each other.

Insulation case 6 accommodating connection conductors 2-5
Is the armature core 1 as shown in FIGS. 3 (A) and 3 (B).
Is positioned concentrically with the armature core and is arranged in the yoke portion Y of the armature core, and is fixed to the armature core 1 by a screw 8 screwed into a screw hole provided in the armature core through a mounting hole 6F. There is.

With the insulating case 6 thus positioned and fixed to the armature core, the connection piece 2a of the connection conductor 2 is formed.
2d are located near the bases of the salient poles P1, P4, P7 and P10, respectively, and the connecting pieces 3a to 3d of the connecting conductor 3 are located near the bases of the salient poles P2, P5, P8 and P11, respectively. , The connection conductors 2 and 3 are positioned.
In addition, the connection pieces 4a to 4d of the connection conductor 4 are respectively salient pole portions P.
Located near the bases of 3, P6, P9 and P12, connecting conductor 5
The connection conductors 4 and 5 are positioned so that the connection pieces 5a to 5l of the above are located near the bases of the salient pole portions P1 to P12, respectively.

One end of the coil C wound around each of the salient pole portions P1, P4, P7 and P10 is connected to the connecting pieces 2a to 2d.
And the other end is connected to the connection piece 5 of the connection conductor 5.
a, 5d, 5g and 5j, and salient pole portions P1, P
4, P7 and P10 coils are connected in parallel with each other.

Further, one end of the coil C wound around each of the salient pole portions P2, P5, P8 and P11 is connected to the connection pieces 3a to 3d of the connection conductor 3, and the other end is connected to the connection piece 5b of the connection conductor 5. , 5e, 5h, and 5k, and the coils C wound around the salient pole portions P2, P5, P8, and P11 are connected in parallel.

Further, one end of the coil C wound around each of the salient pole portions P3, P6, P9 and P12 has connection pieces 4a-4d.
And the other end is connected to the connection piece 5 of the connection conductor 5.
c, 5f, 5i and 5l, the salient pole portions P3, P
The coils C wound around 6, P9 and P12 are connected in parallel.

In this embodiment, the connection between the terminal portion of each coil and the connection piece is performed by winding the terminal portion of the coil around the connection piece and soldering. Any means for connecting the terminal portion of the coil to the connecting piece may be used as long as it can achieve electrical connection, and the terminal portion of the coil may be connected to the connecting piece by welding, for example. Alternatively, a connector may be connected to the terminal portion of the coil by crimping or the like, and the connector may be connected to each connection piece.

An armature 10 is composed of the armature core 1, the coil C wound around each salient pole portion of the core, the connecting conductors 2 to 5 and the insulating case 6 holding the connecting conductor. . This armature is attached to a fixed frame (not shown) by bolts 11 (see FIG. 3B) that pass through attachment holes 1a provided in the yoke portion of the armature core 1.

A brushless DC motor rotor 12 is arranged outside the armature 10. The rotor 12 is attached to a rotating yoke 13 formed in a cup shape, a permanent magnet 14 arranged in a ring shape on the inner circumference of the yoke, and a boss portion 13 a provided on a bottom wall portion of the rotating yoke 13. The rotating shaft 15 is supported by a fixed frame by a bearing (not shown).

The magnet 14 has eight magnetized regions 14a to 14c.
8 h, and these magnetized regions are alternately magnetized in different radial directions to form eight rotor magnetic poles.

Each of the connection pieces 2a to 4a provided on the connection conductors 2 to 4 of the armature 10 serves as a terminal for connecting an external lead wire to the lead wire L (FIG. 3B). (See) is connected.

As in the above embodiment, the salient pole portions P1, P2,
When the coil C wound around each of the coils is a single coil and the coils wound around a plurality of salient pole portions are connected in parallel to increase the current capacity, a plurality of coils connected in parallel are connected. Since the resistance values and the inductances of the coils are the same, it is possible to make the current flow evenly through the plurality of coils C and improve the current balance among the plurality of coils. Also, as in the above embodiment, 4
When the ring-shaped or arc-shaped connection conductors 2 to 5 are concentrically arranged, and the terminal portion of the coil C wound around each salient pole portion is wound around the connection piece of the predetermined connection conductor and soldered. It is possible to connect the coils without using a crossover. Therefore, since a large number of connecting wires do not project in the axial direction of the armature, the size of the armature in the axial direction can be reduced. Further, since it is not necessary to connect a large number of connecting wires, the winding work can be simplified and the manufacturing efficiency of the armature can be improved.

In the above embodiment, the connecting conductors 2 to 5 have a uniform cross-sectional area along the circumferential direction, but n connecting portions for connecting the n connecting pieces of each connecting conductor to each other. The magnitude of the current flowing through each of the points varies depending on the position of the connecting portion. For example, in the connection conductor 2 of FIG. 4, the connection pieces 2a, 2
The connecting portions for connecting b, 2b, 2c, 2c, 2d and 2d, 2a are respectively 200ab, 200bc, 200.
Let cd and 200da be i and the current flowing through each coil C be i, the current flowing through the connecting portions 200ab and 200da on both sides of the terminal portion 2a1 to which the external lead wire is connected is 3i / 2.
And the currents flowing through the other connecting portions 200bc and 200cd are i / 2. Thus, the connecting portion 200bc separated from the terminal 2a1 to which the external lead wire is connected.
And the current flowing through 200cd are smaller than the current flowing through the connecting portions 200ab and 200da connected to the terminal 2a1,
The cross-sectional area of the connecting portions 200bc and 200cd is defined as the connecting portion 200a.
It can be made smaller than the cross-sectional area of b, 200da.

FIGS. 6A and 6B show the axial dimension of the connecting portions 200bc and 200cd of the connecting conductor 2 in the connecting portion 200a.
This is an example in which the cross-sectional areas of the connecting portions 200bc and 200cd are reduced by making the dimensions smaller than the axial dimension of b and 200da. With this configuration, the connecting portion 2
The axial dimension of the 00bc and 200cd portions can be reduced. The same applies to other connection conductors.

As described above, among the n connecting portions which connect the n connecting pieces of the respective connecting conductors, the cross-sectional area of the connecting portion having a small energizing current is the cross-sectional area of the connecting portion having a large energizing current. If the setting is made smaller than this, the axial dimension of the connecting portion with a small energizing current can be shortened, so that it is possible to form a portion of the armature with a shorter axial dimension than the other portions. By effectively utilizing this portion as a space for disposing other components such as the components of the motor drive circuit, the size of the rotating electric machine can be reduced.

In the above-mentioned embodiment, since each connection conductor is formed in a ring shape, a closed short circuit current path is formed by each connection conductor. Therefore, when the current of the armature winding of each phase is switched like a brushless DC motor, when the magnetic flux generated from the armature winding of each phase is changed by the switching, the connection conductor of the other phase is changed. A voltage may be induced to cause a short-circuit current to flow in the short-circuit current path formed by the connecting conductor, which may cause a problem such as heat generation. In order to prevent this, as shown in FIGS. 7A and 7B, each connection conductor is formed in an arc shape (a shape that is not continuous in the circumferential direction) so that a closed circuit is not formed by each connection conductor. do it.

As shown in FIGS. 8A and 8B,
It is also possible to remove the part of the connecting conductor where no current flows. The connecting conductor having the shape shown in FIGS. 7A and 7B or FIGS. 8A and 8B can be easily manufactured by molding a strip plate of copper or the like. In the above embodiment, the axial dimension of the connecting conductors 2 to 5 is set larger than the radial dimension, but as shown in FIGS. 9 (A) and 9 (B),
It is also possible to use a plate-shaped connecting conductor whose axial dimension is smaller than the radial dimension. When this connection conductor is used, as shown in FIGS. 10A and 10B, the connection conductors 2 to 5 are insulated by arranging them in the axial direction with the insulator 7 interposed therebetween. It is stored in the case 6 and the connection piece 2a-
2d, 3a to 3d, 4a to 4d, 5a to 5l are radially projected from the outer circumference of the insulating case 6. In this case, the outer peripheral wall portion 6B of the insulating case 6 may be omitted.

Even when the connecting conductors shown in FIGS. 9 and 10 are used, it is possible to reduce the cross-sectional area of the portion where the energization current is small, or to form an arc shape so as not to form a closed loop. Of course.

In the above embodiment, the connecting conductor and the insulating material 7 for insulating the stacked connecting conductors from each other are provided separately, but the printed board having the conductive foil of sufficient thickness is etched. As a result, a connecting conductor having a predetermined pattern is formed, and the printed board is punched into a contour shape that is substantially similar to the connecting conductor, and the printed conductors are stacked to form a coil connecting device similar to that shown in FIG. be able to.

Alternatively, the required number of connection conductors may be concentrically formed on one printed circuit board, and the terminal portions of the coils may be soldered to the terminal portions provided on each connection conductor.

When the connection conductor is provided on the printed circuit board as described above, the printed circuit board can be fixed to the armature core with screws or the like, so that the insulating case can be omitted. In the above embodiment, the three-phase armature windings are star-connected, but the present invention can be applied to the case where the three-phase armature windings are delta-connected. In this case, since the connection conductor for connecting the neutral point is unnecessary, the connection conductors 2 to 4 are provided as the first to third connection conductors, respectively, as shown in FIG. Then, one end of the coil forming the U-phase armature winding and one end of the coil forming the W-phase armature winding are connected to the first connecting conductor 2 and the coil forming the U-phase armature winding is connected. The other end and one end of the coil forming the V-phase armature winding are connected to the second connecting conductor 3, and the other end of the coil forming the V-phase armature winding and the W-phase armature winding are connected to the second connecting conductor 3. The other ends of the constituent coils are connected to the third connecting conductors 4, respectively.

Although the present invention is applied to the armature for a three-phase rotating electric machine in the above embodiments, the present invention can also be applied to an armature for a single-phase rotating electric machine. FIG. 12 is a development view showing a configuration in the case where the present invention is applied to an armature for a 12-pole single-phase AC magnet generator. In this example, two connection conductors 2 and 3 are provided, and odd-numbered Salient poles P1, P3,
, One end and the other end of the coil wound on P11 are connected conductors 2 and 3, respectively, and one end and the other end of the coil wound on the even-numbered salient pole portions are connected conductors 3 and 2, respectively. It is connected to the.

In the above embodiment, the armature with 12 poles is taken as an example, but the present invention is not limited to the case with 12 poles. For example, as shown in FIGS.
The present invention can also be applied to a pole armature.

In this example, 24 salient pole portions P1 to P24 project from the yoke portion Y of the armature core 1 ', and a single coil C is wound around each salient pole portion.

In this example, coils wound around salient pole portions P1 and P4, coils wound around salient pole portions P7 and P10, coils wound around salient pole portions P13 and P16, and The coils wound around the salient pole portions P19 and P22 are connected in series to form a total of four series coil groups, and one end of each of the four series coil groups is connected to the connection piece 2a of the connection conductor 2. 2d, and the other end is connected to the connection pieces 5a, 5d, 5g, 5j of the connection conductor 5. As a result, four series coil groups are connected in parallel with each other, and a U-phase armature winding is formed by these four series coil groups. The armature winding of the other phase is also configured by connecting in parallel four series coil groups each including two coils wound around the salient pole portion of the same phase connected in series. There is.

The connecting conductors used in this embodiment are as shown in FIG. 15, and the connecting conductors 2 to 4 for U-phase or W-phase are the same as those used in the above-mentioned embodiment, but for neutral points. In the connection conductor 5, the positions of the connection pieces 5a to 5l are different from those in the above-mentioned embodiment.

The rotor 12 'to be combined when the armature of this embodiment is used in a brushless DC motor is shown in FIG.
As shown in (A) and (B), 16 of the ring-shaped permanent magnets 14 attached to the inner circumference of the cup-shaped rotating yoke 13 are provided.
Each of the magnetized regions 14a to 14p is magnetized in the radial direction to form 16 magnetic poles.

In the embodiment shown in FIGS. 13 to 15,
A series coil group of armature windings of each phase (for example, salient pole portion P1,
When the coils C each wound around P4 are connected in series), it is necessary to connect adjacent in-phase coils with a crossover wire, but it is necessary to connect with the crossover wire to each series coil. Since only the connecting portions of the groups are connected and the parallel connection of the plurality of series coil groups is performed by the connecting conductors 2 to 5, the connecting portions by the connecting wires can be reduced, and a large number of connecting wires project in the axial direction so that the rotary electric machine It is possible to prevent the dimension in the axial direction from becoming long.

[0058]

As described above, according to the first, third, fifth and sixth aspects.
According to the invention described in (3), the coil wound around each salient pole portion is a single coil, and the coils wound around a plurality of salient pole portions are connected in parallel, or a plurality of salient pole portions are connected. Since the current capacity is increased by connecting the coils wound in parallel in series, the resistance and inductance of the coils or groups of coils connected in parallel are made equal to each other, and Alternatively, there is an advantage that a current can be made to flow uniformly in the coil group, and the current balance among the plurality of coils or the coil group can be improved.

According to the invention described in claims 2, 4 and 7, annular or arc-shaped connecting conductors are arranged concentrically, and the terminal portions of the coils wound around the salient pole portions are connected in a predetermined manner. Since it was wrapped around the connection piece of the conductor and soldered,
It is possible to prevent a large number of connecting wires from projecting in the axial direction of the armature, and it is possible to reduce the axial dimension of the armature. Further, in this case, the connection of the coil is facilitated, so that the winding work can be simplified and the manufacturing efficiency of the armature can be improved.

Further, according to the invention described in claim 9, among the connecting portions connecting the connecting pieces of the respective connecting conductors, the connecting portion having a small energizing current has a cross-sectional area of the connecting portion having a large energizing current. Since it is set to be smaller than the cross-sectional area of, the axial dimension of the connecting portion having a small energizing current can be shortened. Therefore, a part of the armature having a shorter axial dimension than the other part can be formed, and this part can be used as a space for arranging other parts, and the miniaturization of the rotating electric machine can be promoted. .

Furthermore, in the present invention, when arc-shaped connecting conductors are used, since a closed circuit is not formed by each connecting conductor (one turn is not formed), the armature coil of each phase is not formed. It is possible to prevent a trouble such as heat generation from occurring due to a short-circuit current flowing through the connecting conductor of the other phase due to a change in the magnetic flux generated when the energizing current is switched.

[Brief description of drawings]

FIG. 1 is a development view showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a connection diagram showing a winding configuration according to an embodiment of the present invention.

3A and 3B are a top view and a front vertical sectional view showing an example of a rotary electric machine using an armature according to an embodiment of the present invention.

4A and 4B are respectively a top view and a front vertical sectional view of a connection conductor used in an embodiment of the present invention.

5A and 5B are respectively a top view and a front vertical sectional view showing a state in which the connection conductor of FIG. 4 is housed in an insulating case.

6A and 6B are respectively a top view and a front vertical cross-sectional view showing another example of the connection conductor used in the embodiment of the present invention.

7 (A) and 7 (B) are respectively a top view and a front vertical sectional view showing still another example of the connecting conductor used in the embodiment of the present invention.

8A and 8B are respectively a top view and a front vertical sectional view showing still another example of the connecting conductor used in the embodiment of the present invention.

9 (A) and 9 (B) are respectively a top view and a front vertical sectional view showing still another example of the connecting conductor used in the embodiment of the present invention.

10A and 10B are respectively a top view and a front vertical sectional view showing a state in which the connection conductor of FIG. 9 is housed in an insulating case.

FIG. 11 is a development view showing the configuration of another embodiment of the present invention.

FIG. 12 is a development view showing the configuration of still another embodiment of the present invention.

FIG. 13 is a development view showing the configuration of still another embodiment of the present invention.

14A and 14B are respectively a top view and a front vertical sectional view showing an example of a rotating electric machine using the armature of the embodiment of FIG.

15A and 15B are respectively a top view and a front vertical sectional view showing a state in which a connection conductor used in the embodiment of FIG. 13 is housed in an insulating case.

FIG. 16 is a development view showing a configuration of a conventional armature.

FIG. 17 is a connection diagram showing a winding configuration of the armature shown in FIG.

[Explanation of symbols]

 1 Armature Iron Core 2 U-Phase Connection Conductor 3 V-Phase Connection Conductor 4 W-Phase Connection Conductor 5 Neutral Point Connection Conductor 6 Insulation Case Y Yoke Part P1 to P24 Salient Pole C C Coil

Claims (9)

[Claims] 1. An armature for a rotating electric machine, comprising: an armature core formed by radially projecting a large number of salient pole portions from an annular yoke portion; and coils wound around the salient pole portions. In the above, the coil wound around each salient pole portion of the armature core consists of a single coil conductor wound a predetermined number of turns, and the coils wound around a plurality of salient pole portions are arranged in parallel. An armature for a rotating electric machine, characterized in that the armature windings of one phase are connected to each other. 2. A state in which a predetermined number of ring-shaped or arc-shaped connection conductors to which terminal portions of coils connected in parallel to each other are connected share a central axis with the armature core of a yoke portion of the armature core. The armature for a rotary electric machine according to claim 1, wherein the coils that are arranged in each of the plurality of salient pole portions are respectively connected in parallel through the connection conductor. 3. An armature for a rotating electric machine, comprising: an armature core formed by radially projecting a large number of salient pole portions from an annular yoke portion; and coils wound around the salient pole portions. In the above, the coil wound around each salient pole portion of the armature core is formed by winding a single coil conductor a predetermined number of turns, and the coils wound around a plurality of salient pole portions are connected in series. An armature for a rotating electric machine, comprising a plurality of series coil groups each of which is connected, wherein the plurality of series coil groups are connected in parallel to form an armature winding of one phase. 4. A predetermined number of ring-shaped or arc-shaped connection conductors to which terminal portions of series coil groups connected in parallel with each other are connected to a yoke portion of the armature core and share a central axis with the armature core. The armature for a rotary electric machine according to claim 3, wherein the plurality of series coil groups are arranged in parallel with each other and are connected in parallel via the connection conductor. 5. An armature core formed by radially projecting 3n (n is an integer of 2 or more) salient pole portions from an annular yoke portion, and 3n salient pole portions of the armature core, respectively. Winding 3n coils, said 3n coils being U,
In an armature for a rotating electric machine, which is connected so as to form a V-phase and W-phase armature winding, a coil wound around each salient pole portion of the armature core has a single coil conductor in a predetermined turn. An electric machine for a rotary electric machine, which is composed of several turns, and in which coils wound around a plurality of salient pole portions having the same phase are connected in parallel to form an armature winding for each phase. Child. 6. An armature core formed by radially projecting 3n (n is an integer of 2 or more) salient poles from an annular yoke portion, and 3n salient poles of the armature core, respectively. Winding 3n coils, said 3n coils being U,
In an armature for a rotating electric machine, which is connected so as to form a V-phase and W-phase armature winding, a coil wound around each salient pole portion of the armature core has a single coil conductor in a predetermined turn. A plurality of series coil groups, each of which is formed by winding several turns and in which coils wound around a plurality of salient pole portions having the same phase are connected in series, are formed, and the plurality of series coil groups are arranged in parallel with each other. An armature for a rotating electric machine, characterized in that the armature windings of each phase are connected to each other. 7. A U-phase connecting conductor, to which a terminal portion of the coil constituting the U-phase armature winding opposite to the neutral point is connected,
A V-phase connecting conductor to which a terminal portion on the side opposite to the neutral point of the coil forming the V-phase armature winding is connected, and a side opposite to the neutral point of the coil forming the W-phase armature winding 4 ring-shaped connecting conductors for W-phase, to which the end portions of are connected, and connection conductors for neutral points, to which the end portions on the neutral point side of the coils forming the armature windings of the respective phases are connected. Alternatively, arcuate connecting conductors are arranged in the yoke portion of the armature core in a state of sharing the central axis with the armature core, and each of the U-phase to W-phase connecting conductors is connected to each connection conductor. The coils to be connected each have a connecting piece protruding toward the salient pole portion side, and the end portion of the coil forming the armature winding of each phase is connected to the connecting piece of a predetermined connecting conductor. The armature for a rotating electric machine according to claim 5, wherein 8. A first connecting conductor to which one end of a coil forming a U-phase armature winding and one end of a coil forming a W-phase armature winding are connected, and a U-phase armature winding. A second connecting conductor to which the other end of the coil forming the wire and one end of the coil forming the V-phase armature winding are connected; the other end of the coil forming the V-phase armature winding and the W-phase A total of three ring-shaped or arc-shaped connection conductors together with the third connection conductor to which the other end of the coil that constitutes the armature winding is connected to the armature core's yoke portion. Each of the U-phase to W-phase connecting conductors arranged in a state of sharing an axis has a connecting piece protruding toward a salient pole portion around which a coil to be connected to each connecting conductor is wound. , Characterized in that the end portion of the coil that constitutes the armature winding of each phase is connected to the connection piece of the predetermined connection conductor Rotating electric machine armature according to claim 5 or 6. 9. One of the connecting pieces of each connecting conductor serves as a terminal for connecting an external lead wire, and the energizing current is selected from among a plurality of connecting portions connecting the connecting pieces of each connecting conductor. 9. The armature for a rotary electric machine according to claim 7, wherein the cross-sectional area of the small connecting portion is set smaller than the cross-sectional area of the connecting portion having a large energizing current.