JP2001045688A - Armature coil and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve occupancy rate of an armature core in a slot. SOLUTION: An armature coil 3 constitutes integratedly a conductor coiled in a plurality of lines, a pair of linear coils 30, 30 provided in parallel with each other, and coil end portions 31, 31 for individually coupling both ends of these coils. Moreover, there are provided the sloping portions 32, 32 that are coupled with the coil ends 31, 31 with opposite slopes with respect to the respective extending portions at the end portions of the linear coils 30, 30. Moreover, vertically coupled portions 33, 33 are also provided to couple such sloping portions 32, 32 almost in vertical relationship.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an armature such as a stator for a linear motor and a stator for an induction motor which are sequentially mounted in a plurality of slots arranged in parallel with an armature core made of a magnetic material. The present invention relates to an armature coil and a method for manufacturing the armature coil.

[0002]

2. Description of the Related Art A stator of a linear motor includes an armature core having a plurality of slots arranged at predetermined intervals in a longitudinal direction on a long rod made of a magnetic material. The coils are wound and held in such a manner that currents having different phases are supplied to the respective coils, thereby generating a magnetic field moving in the direction in which the slots are juxtaposed. The winding method of the coil is classified according to the number of slots included in the winding area, and a winding method including one slot in the rotation area and a winding method including two slots are often adopted. Further, in order to ensure the continuity of the magnetic field generated by each coil, half of adjacent coils are stacked and arranged in the depth direction inside each slot.

[0003] The coil as described above can be constructed by utilizing a convex portion left in a comb-like shape between the slots of the armature core and winding a conductor wire many times around the corresponding convex portion. In such a case, there is a problem that winding the conductor takes a lot of time and productivity is low.
As disclosed in Japanese Patent Application Laid-Open No. 7-154955, a pair of straight coil portions to be inserted into the slots and a coil end portion connecting both ends thereof have an oval or rectangular planar shape. A winding method of forming a stator by using a plurality of armature coils formed in advance and sequentially inserting them into corresponding slots of an armature core has been widely adopted.

FIG. 18 is an explanatory diagram of this winding method. In the figure, reference numeral 1 denotes an armature core made of a magnetic material and formed in a long rod shape having a rectangular cross section.
A plurality of rectangular groove-shaped slots 10 having a predetermined depth are formed at predetermined intervals in the length direction. 2 is
As shown in the figure, the armature coil 2 includes coil end portions 21, which are formed by connecting both ends of linear coil portions 20, 20 which are parallel to each other, in a direction substantially orthogonal to these.
They are connected with each other by 21, and are formed to have a rectangular planar shape as shown in the figure.

The illustrated armature uses a plurality of armature coils 2 configured as described above and
10 ... Each armature coil 2, 2
.. Are mounted on a plurality of slots arranged in parallel with the armature core 1.
Of the 10, 10,..., Two straight slots 20, 20, adjacent to each other with one slot 10 therebetween.
Are sequentially inserted from one side in the longitudinal direction of the armature core 1 to the other side. At this time, in order to ensure the continuity of the magnetic field generated by the armature coils 2, 2,... It is superimposed on the linear coil portion 20 of the child coil 2 to realize the above-described lamination arrangement.

FIG. 1 shows a winding shape in a winding manner in which one slot is included in the orbital area.
Two slots 10 are provided in the circling area of the armature coils 2, 2,.
The winding method including 10 can be similarly realized.

[0007]

Now, in the linear motor using the armature constructed as described above, the space factor of the coil in each slot 10 of the armature core 1 (= the conductor occupied in the slot). When the cross-sectional area / cross-sectional area of the slot is small, the primary side resistance increases, and the heat loss (primary copper loss) with respect to the input current becomes large, which causes a problem of lowering the motor efficiency. Raising rates is an important issue.

FIG. 19 is a partially cutaway side view of an armature constituted by using the above-described armature coils 2, 2,. This armature is constructed by mounting two armature coils 2 and 2 in the respective slots 10 of the armature core 1 with the respective linear coil portions 20 and 20 superimposed on each other as described above. The coil end portions 21, 21 of the armature coils 2, 2 are each slotted.
Outside the slot 10, since the coil 10 overlaps with the coil end 21 of the other armature coil 2 mounted so that the slot 10 is included in the orbital area, the linear coil sections 20, 20 inside each slot 10 are As shown in the broken portion in the figure, the coil ends 21 are stacked with a gap corresponding to the diameter of the coil end portion 21.Since the gap is excluded from the occupied area of the coil, the coil There is a problem that it is difficult to increase the space factor.

Further, in an armature having a winding shape in which two slots are included in the orbital area, instead of the winding shape shown in FIGS. 18 and 19, a linear coil laminated in each slot 10 Armature coil 2, comprising sections 20, 20
2 overlap each other on both sides of the two coil end portions 21 and 21 outside the slot 10,
, The space factor of the coil will be further reduced.

The above-mentioned Japanese Patent Application Laid-Open No. Hei 7-149555 discloses an armature having a configuration in which the space factor is increased by using an armature coil 2 having a special shape in which the cross sections of the coil end portions 21 and 21 are flattened. It has been disclosed. According to this configuration, each slot
The flattening reduces the overlapping height of the coil end portions 21 and 21 generated outside of the slot 10, reduces the gap between the linear coil portions 20 and 20 stacked in the slot 10, and increases the space factor. However, the effect of improving the space factor that is actually obtained is small, and it is difficult to effectively solve the above-described problem.

Further, the flattened coil end portions 21, 21
The armature coil 2 having a special shape is manufactured by forming a single conductor such as punching of a conductive plate, bending of a conductive bar, and the like. There is a problem that leads to increase,
The armature coil 2 composed of a single conductor has a problem that the inductance cannot be increased, the fine adjustment of the inductance is difficult, and a high shape accuracy is required to obtain a desired inductance.

The present invention has been made in view of such circumstances, and can be configured only by simple bending using a conductor wound a plurality of times. The space factor of the armature core in the slot can be reduced. It is an object of the present invention to provide an armature coil that can be significantly improved as compared with the related art, and a method for manufacturing the same.

[0013]

An armature coil according to a first aspect of the present invention comprises a pair of linear coil portions which are parallel to each other, and a coil end portion which connects both ends of each of the coil portions in a plurality of turns. Of a plurality of slots arranged in parallel with the armature core made of a magnetic material.
In an armature coil that constitutes an armature by inserting and holding the pair of linear coil portions in separate slots located apart in the juxtaposition direction, the coil end portion is provided at an end of the pair of linear coil portions. And a vertical connecting portion which connects the inclined portions substantially perpendicularly to each of the inclined portions continuously connected to each other with an inclination opposite to the extending direction. Features.

Further, the armature coil according to the second aspect of the present invention has the first
In the armature coil of the invention, the conductor is a linear conductor wound in multiple turns each time, and each of the plurality of conductors forming the inclined portion is substantially parallel to each other and substantially parallel to the vertical communication portion. It is characterized by being arranged along a plane passing through the axis.

Further, the armature coil according to the third aspect of the present invention has the first
In the armature coil according to the invention, the conductor is a flat band-shaped conductor wound in a single row each time, and the armature coil according to the fourth invention is also configured such that the conductor is folded in the width direction to form two rows. The flat strip-shaped conductors are arranged in a circle and are wound with the folded portion inside.

An armature coil according to a fifth aspect of the present invention is characterized in that
In the armature coil according to any one of the fourth to fourth aspects, the straight coil portion has a rectangular cross section having two sides substantially parallel to the extending direction of the vertical connecting portion. .

In these inventions, when each of the linear coil portions is inserted and held in the corresponding slot of the armature core, the vertical connecting portions on both sides of the armature core face in the same direction as the slot, and are inserted into the slot. With respect to the vertical connecting portion of the other armature coil, the respective inclined portions are vertically overlapped and arranged substantially in parallel, so that interference between the coil end portions is eliminated, and the space factor in the slot is improved. In addition, the linear coil portion and the coil end portion are formed of a conductor wound a plurality of times, so that the inductance can be finely adjusted.

Further, in the method for manufacturing an armature coil according to the sixth aspect of the present invention for manufacturing the armature coil, the two sides of the pair of straight portions parallel to each other may be curved in an arc shape in the side-by-side plane. Using a coil material composed of a conductor wound a plurality of times, having a planar shape of an ellipse, the pair of straight portions are not deformable with an appropriate length on each side. Constrained, and also restrain the curved part so that it can not be deformed,
The constrained portions of the pair of linear portions are moved substantially in equal directions in directions opposite to each other in a direction substantially perpendicular to the juxtaposed surfaces, and the rectilinear portions are constrained by the constrained portions of the linear portions to constrained portions of the curved portions. And the inclined connecting portion is formed by an unconstrained portion of the linear portion.

In the present invention, a conductor is wound a plurality of times by a general coil winding process to form a coil material having an elliptical winding shape. The armature coil having the above-described configuration is formed by a simple procedure of moving the bending portion in a direction parallel to the juxtaposed surfaces while being separately restrained.

An armature coil according to a seventh aspect of the present invention includes a pair of linear coil portions that are parallel to each other, and a coil end portion that connects both ends of the armature coils separately, and an armature core made of a magnetic material. An armature coil configured to insert and hold the pair of linear coil portions in separate slots located apart from each other in the juxtaposition direction among a plurality of slots arranged side by side in the armature coil; On both sides of the linear portion constituting the conductor piece, a conductor piece formed by continuously connecting inclined portions inclined in the opposite direction to the extension direction of the straight portion, and the tip of each inclined portion is superimposed in the thickness direction and viewed in plan. And a connecting means for connecting one or a plurality of the conductor pieces combined so as to form a hexagon at a tip end of the inclined portion.

An armature coil according to an eighth aspect of the present invention is the
In the armature coil according to the present invention, the connection means is a connection pin that passes through the overlapped portion of the inclined portions in the thickness direction.

In these inventions, a plurality of conductor pieces are used which are formed by connecting a plurality of inclined portions which are inclined in opposite directions on both sides of the linear portion, and these are divided into two sets and overlapped. Are connected in such a manner as to form a hexagonal shape in a plan view, with a straight portion forming a straight coil portion, and an inclined portion and a connecting portion forming a coil end portion, similar to the first to fifth inventions. An armature coil is obtained to improve the space factor in each slot when the armature coil is mounted on the armature core.
Further, the connection of the two sets of conductor pieces is simply realized by driving a connection pin into the overlapping portion of the inclined portion.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is a perspective view of an armature coil according to a first invention of the present invention, and FIG. 2 is a perspective view of a stator of a linear motor configured using the armature coil shown in FIG.

As shown in FIG. 1, the armature coil 3 includes a pair of linear coil portions 30, 30 which are parallel to each other, and coil end portions 31, 31 which respectively connect both ends thereof. The coil end portions 31, 31 are connected to the linear coil portions 30, 30.
At both ends, inclined portions 32, which are continuously provided with a predetermined inclination angle in opposite directions within the same plane with respect to their respective extension directions,
32 and the inclined part connected to the same side of both straight coil parts 30, 30
Vertical connecting portions 33, 33 for connecting the ends of 32, 32 with each other in a substantially vertical manner with each of them, and a plurality of linear conductors (conductive wires) made of a good conductor such as copper are provided each time. The coil body is formed integrally with the linear coil units 30, 30 as a coil body wound around the coil unit. As shown, the plurality of conductors forming the inclined portion 32 each pass through an axis substantially perpendicular to the vertical connecting portion 33,
The planes are substantially parallel to each other.

An armature 1 shown in FIG. 2 is formed by forming slots 10 at predetermined intervals in a longitudinal direction in a long bar made of a magnetic material having a rectangular cross section, as in FIG. The core,
The illustrated armature (stator) uses a plurality of armature coils 3 configured as shown in FIG.
It is configured to be attached to 0, 10 ... Each of the armature coils 3, 3,... Is mounted on two adjacent slots 10, 10 of the plurality of slots 10, 10,. And each linear coil part
The armature cores 30 are inserted and held, and are sequentially realized from one side in the longitudinal direction of the armature core 1 to the other side. Also, at this time, one linear coil portion 30 of each armature coil 3 is superimposed on the linear coil portion 30 of the armature coil 3 previously mounted in the corresponding slot 10, and each armature coil 3, 3. The continuity of the magnetic field generated by 3 is ensured.

With the mounting described above, the vertical connecting portions 33, 33 of each armature coil 3 are located on both sides in the width direction of the armature core 1 as shown in the figure, and the respective linear coil portions 30, 30 are inserted. At an intermediate position between the slots 10, 10, they stand in the depth direction, and one of the inclined portions 32, 32 is an end of the linear coil portion 30 inserted at an upper position inside the corresponding slot 10. And the upper half of the vertical connecting portion 33, and the other, the lower half of the vertical connecting portion 33 and the end of the linear coil portion 30 inserted at the lower position in the corresponding slot 10, respectively. Are arranged so as to communicate with each other at substantially the same height position as the linear coil portion 30 corresponding to.

FIG. 3 is a plan view showing the positional relationship between the coil end portions 31, 31 on both sides of the armature core 1, and FIG.
It is an arrow view by the IV-IV line. As described above, the inclined portions 32, 32 of the coil end portions 31, 31 are continuously provided at the ends of the linear coil portions 30, 30 in directions opposite to each other with respect to the extension thereof. The inclined portion 32 connected to the linear coil portion 30 inserted at the upper position inside the appropriate slot 10 is connected to the linear coil portion 30 inserted at the lower position inside the slot 10 adjacent to one side. It overlaps with the inclined portion 32 in a state where it crosses in the opposite direction without interfering vertically.

Therefore, the armature coils 3, 3,... Shown in FIG.
, The respective coil end portions 31, 31... Do not interfere with each other outside the slots 10, 10, and the respective linear coil portions 30, 30 are densely stacked vertically inside the respective slots 10, 10. It can be mounted in a state, and the space factor of the coil in each slot 10 can be increased.

Further, the armature coil 3 shown in FIG. 1 has at least the linear coil portions 30, 30 in the following procedure.
Can be configured to have a rectangular cross section. In the case where such linear coil portions 30 having a rectangular cross section are provided, FIG.
As shown partially broken inside, each slot 10 having a rectangular cross section can be densely inserted without securing a gap in the width direction, and the space factor of the coil in each slot 10 can be reduced. It is possible to further increase the size.

Further, as described above, the armature coil 3 shown in FIG. 1 has a surface in which a plurality of conductors forming the inclined portions 32 are orthogonal to the vertical connecting portion 33 and substantially parallel to each other. Therefore, it can be configured by being deformed without difficulty by the following procedure.

FIG. 5 is an explanatory diagram of a procedure for manufacturing the armature coil 3 shown in FIG. In the manufacture of the armature coil 3, as shown in FIG. 5A, a pair of straight portions 30a, 30a parallel to each other and semicircular curved portions 31a, 31a respectively connecting both ends thereof are separately provided. An oval coil material 3a integrally formed is used, and the central portions of the linear portions 30a, 30a are restrained from being deformed with an appropriate length on both sides, and the curved portions 31a, 31a are deformed. The straight section 30
a, 30a, as shown by the white arrow in the figure,
In the width direction of the coil material 3a, more specifically, the linear portions 30a, 3
The linear portions 30a are moved in opposite directions in a direction substantially perpendicular to the arrangement direction of 0a, and the non-constrained portions on both sides of the linear portions 30a are inclinedly deformed.

At this time, the constrained portions of the straight portions 30a, 30a that are non-deformably constrained become the linear coil portions 30, 30, and the non-constrained portions of the straight portions 30a, 30a that are deformed as described above are the inclined portions 32. , 32, and the bending portions 31a, 31a become the vertical connecting portions 33, 33 to constitute the armature coil 3 as shown in FIG.

FIG. 6 is an explanatory view of the procedure for manufacturing the coil material 3a used for the armature coil 3 of FIG. This coil material
3a, as shown in the figure, a thin and long core 40 having a width corresponding to the winding width of the coil is rotated about shafts 41 projecting from both sides in the width direction at a substantially central portion in the longitudinal direction. Outside the core 40, a conductive wire 42 made of a good conductor such as a copper wire is wound over a plurality of layers while moving the winding position in the width direction at a predetermined pitch for each turn, and a predetermined number of turns is obtained. The core 40
It can be manufactured by a general coil manufacturing method of removing from a coil. The winding position of the conductor 42 is
This is realized by sequentially moving the guide roller 43 which rolls into the conducting wire 42 in the middle of the feeding path in the width direction of the winding core 40 as indicated by the arrow in the drawing.

The coil material 3a obtained in this manner has a rectangular cross-section formed by a plurality of conductive wires 42 wound in multiple rows each time within a winding width corresponding to the width of the winding core 40. The armature coil 3 configured as described above using the coil material 3a has a large inductance and can easily perform fine adjustment of the inductance. In the armature configured as shown in FIG. 2 mounted on the armature core 1 using a plurality of coils, it is necessary to improve the space factor of the coil in each of the slots 10 and 10 and achieve good characteristics. Can be.

After obtaining the coil material 3a shown in FIG. 5 (a), a force in the direction of juxtaposition is applied to a pair of straight portions 30a, 30a which are parallel to each other, and as shown in FIG. The armature coil 3 may be configured by the above-described procedure by using the coil material 3b in which the gap between 30a is filled. According to this configuration, the linear coil portions 30, 30 inserted into the respective slots 10 having a rectangular cross section are in a state in which the linear coil portions 30, 30 are closely overlapped with no gap in the depth direction as shown in FIG. The space factor of the coil in each slot 10 can be further increased.

FIG. 8 is a perspective view showing an example of an apparatus used for manufacturing the armature coil 3 according to the procedure shown in FIG. In the illustrated device, four feed screw shafts 5a, 5b, 5c, and 5d that are parallel to each other are erected along a bottom surface of a rectangular box-shaped frame 5 having an open upper surface. A moving table that moves according to the rotation of the two feed screw shafts 5a and 5d
50 and 51 are attached separately, and the other two feed screw shafts 5
A moving table 52 that moves in accordance with these rotations is attached to b and 5c.

In the center of the frame 5, an operation shaft 5e is provided in parallel with each of the feed screw shafts 5a, 5b, 5c, 5d. One end of the operation shaft 5e is protruded from one side wall (front wall) of the frame 5 to the outside, and ends of feed screw shafts 5a, 5b, 5c, and 5d protruding to the same side and a separate belt type. Linked by a power transmission mechanism, feed screw shafts 5a, 5b, 5c, 5d
Are configured to rotate around respective axes in accordance with the rotation of the operation shaft 5e.

As is apparent from the figure, the transmission mechanism from the operating shaft 5e to the feed screw shafts 5a, 5b, 5c, 5d has a reduction ratio with respect to the two feed screw shafts 5a, 5d on both sides and the other two. Feed screw shaft 5
b, 5c, and the number of rotations of the feed screw shafts 5a, 5d per one rotation of the operation shaft 5e is larger than that of the feed screw shafts 5b, 5c.
The rotation speed of the moving table 52 accompanying the rotation of the feed screw shafts 5b, 5c is substantially half of the rotation speed of the moving table 5c, and the moving amount of the moving table 50, 51 due to the rotation of the feed screw shafts 5a, 5d. It is set to be approximately twice as large.

The U-shaped left and right clampers 53, 54 having openings for receiving the clamps on the opposite sides of the movable tables 50, 51 on both sides, respectively, move in the direction of coming and going from each other. A lower clamper 55 also having a U-shape is fixed to the center movable base 52 with the opening for receiving the clamped object facing upward. Further, on the rear wall of the frame 5, an upper clamper 56 also having a U-shape is provided at a position facing above the lower clamper 55 when the central moving table 52 moves to the same side. Is detachably attached with its receiving opening facing downward.

In the manufacturing apparatus as described above, the moving tables 50, 51, 52 are moved to the rear wall of the frame 5, and the openings of the left and right clampers 53, 54 and the lower clamper 55 are aligned in the front-rear direction. The left and right clampers 53 and 54 are separated from each other, and the upper clamper 55 is removed in this state.
The coil material 3a shown in FIG. 5 is inserted from above, and the lower linear portion 30a is attached to the lower clamper 54 by the left and right curved portions 3a.
1a and 31a are clamped by the left and right clampers 53 and 54, respectively, and the upper clamper 56 is attached.
After that, the operation shaft 5e projecting to the front side of the frame 5 is rotated to rotate the feed screw shafts 5a, 5b, 5c and 5d.

Thus, the center movable table 52 is rotated according to the rotation of the feed screw shafts 5b and 5c, and the left and right movable tables 50 and 51 are adjusted according to the rotation of the feed screw shafts 5a and 5d. Move forward as shown by, and straight section 30a clamped by lower clamper 55
And the left and right curved parts clamped by the left and right clampers 53, 54
1a and 31a are moved forward with their respective holding portions restrained so as not to be deformed.

As described above, the center movable table 52 to which the lower clamper 55 is attached has a movement amount approximately twice that of the left and right movable tables 50, 51 to which the left and right clampers 53, 54 are attached. And
Also, since the upper clamper 56 does not move, when the left and right curved portions 31a, 31a sandwiched between the left and right clampers 53, 54 are used as a reference, the restricted portions of the linear portions 30a, 30a by the upper and lower clampers 56, 55 are used. Are moved in opposite directions by substantially equal amounts, and the straight portions 30a, 30a protruding on both sides of the upper and lower clampers 56, 55 are inclinedly deformed between the left and right clampers 53, 54, The manufacturing procedure shown in FIG. 5 is realized, and the armature coil 3 as shown in FIG. 1 is formed. In FIG. 8, the armature coil 3 formed as described above is indicated by a two-dot chain line.

Note that, due to the above-described inclined deformation, forces approaching each other are applied to the left and right curved portions 31a, 31a sandwiched between the left and right clampers 53, 54, as described above.
The left and right clampers 53, 54 are attached to the respective moving tables 50, 51 so that the left and right clampers 53, 54 can be moved in the directions of coming and going with each other. When the clampers 53 and 54 approach each other as shown by the dashed arrows in the drawing, the deformation can be performed without applying excessive force to the conducting wire. The rotation of the operation shaft 5e for performing the above-described operation may be performed by manual operation of a handle attached to the protruding end of the operation shaft 5e, and may be transmitted from an appropriate rotation drive source such as a motor. May be performed.

The armature coil 3 thus formed is
After the clamping by the clampers 53, 54, 55, 56 is released, and the upper clamper 56 is removed, it can be taken out by pulling it upward. At the time of this removal, it is desirable to fix each part by a fixing means such as an adhesive or a filler so as to maintain the above-mentioned molded shape. Note that, as is widely used in the manufacture of various coils, the fixing is performed by forming a coil material by winding a conductive wire coated with a thermosetting adhesive in advance, and applying heat after the above-described molding. It can be easily realized by the procedure.

As described above, the armature coil 3 according to the present invention is not a coil material 3a or 3b formed by winding a linear conductor (the conducting wire 42) a plurality of times in multiple rows, as shown below. It is also possible to use a coil material having another configuration.

FIG. 9 is an explanatory diagram of another manufacturing procedure of the armature coil 3. In this drawing, a thin flat strip-shaped conductor having a predetermined width is wound a plurality of times in a single row each time, and as shown in FIG. 9A, a pair of straight portions 30c, 30c which are parallel to each other,
An elliptical coil material 3c formed integrally with semicircular curved portions 31c, 31c connecting these two ends, respectively, is used. As shown in FIG.
By using the device shown in (1), the central portions of the straight portions 30c, 30c are restrained so that they cannot be deformed over an appropriate length, and the curved portions 31c, 31c are restrained so that they cannot be deformed, as shown by the white arrow in the figure. , Straight section
The constrained portions of 30c, 30c are moved in opposite directions in the width direction, and the non-constrained portions on both sides of these linear portions 30c, 30c are inclinedly deformed.

At this time, the constrained portions of the straight portions 30c, 30c that are non-deformably constrained become the linear coil portions 30, 30, and the non-constrained portions of the deformable straight portions 30c, 30c are the inclined portions 32. , 32, and the curved portions 31c, 31c become vertical connecting portions 33, 33, thereby forming an armature coil 3 having a rectangular cross section as shown in FIG. 9B.

FIG. 10 is a perspective view of a stator of a linear motor constituted by using the armature coil 3 shown in FIG. 9, and FIG.
FIG. 3 is a plan view showing a positional relationship between coil end portions 31 on both sides of an armature core 1. Reference numeral 1 in FIG. 10 denotes an armature core formed by forming slots 10 at regular intervals in a longitudinal direction on a long bar made of a magnetic material having a rectangular cross section. 9), a plurality of armature coils 3 configured as shown in FIG. 9 are used, and these are mounted in the respective slots 10, 10,.

In this mounting, the linear coil portions 30, 30 of the respective armature coils 3 are inserted and held in two adjacent slots 10, 10 with one slot 10 interposed therebetween. The portions 30 are sequentially realized from one side in the longitudinal direction of the armature core 1 to the other side in such a manner that the portions 30 are sequentially superimposed on the linear coil portions 30 of the armature coils 3 previously mounted in the corresponding slots 10. ing. Further, in FIG. 10, the armature coil 3 is mounted in a plurality of stages (three stages) within the depth range of the slots 10, 10,... To constitute an armature.

In the armature constructed as described above, the vertical connecting portions 33 of each armature coil 3 are located on both sides in the width direction of the armature core 1 as shown in the drawing.
At an intermediate position between the respective slots 10 and 10 in which 0 and 30 are inserted, the inclined portions 32 and 32 that overlap in three steps in an attitude standing in the depth direction and continue to each vertical connecting portion 33 are Each of the slots 10 and 10 of the armature core 1 is overlapped with each other in a state of crossing in opposite directions without interfering vertically.
, The linear coil portion 30 of the armature coil 3
Are mounted in a state where they are densely stacked in the upper and lower six stages, and the space factor of the coil in each slot 10 can be increased.

The armature coil 3 shown in FIG. 9 has a rectangular cross section made of a flat band-shaped conductor wound a plurality of times in a single row each time.
10 can be densely inserted into the inside of each slot 10, and it is possible to further increase the space factor of the coil in each slot 10 and to have a large inductance, and to fine-tune the inductance by adjusting the number of turns. It can be done easily. Good characteristics can be stably realized.

The armature shown in FIG.
The armature coils 3 are stacked in three layers within 0, 10,..., And when compared with the armature shown in FIG. 2, the thickness of each armature coil 3 can be reduced. By
The overhang length (A dimension in FIG. 11) of the coil end portions 31, 31 on both sides of the armature core 1 can be set small, and the width dimension of the entire armature (W in FIG. 11) can be reduced. And the resistance of each armature coil 3 is reduced. As described above, the efficiency of the motor can be improved by stacking the armature coils in a plurality of stages.

FIG. 12 is a perspective view showing another embodiment of the armature coil 3 constituted by using a thin-walled strip-shaped conductor as in FIG. In this armature coil 3, FIG.
Unlike this, an edgewise winding in which a flat strip-shaped conductor is overlapped and wound in the width direction of the armature coil 3 is employed. According to this configuration, the deformation of the inclined portions 32, 32 in the above-described manufacturing procedure can be more easily performed. Can be done.

FIG. 13 is an explanatory diagram of another manufacturing procedure of the armature coil 3. In this figure, a thin flat strip-shaped conductor is wound a plurality of times in two rows each time, and as shown in FIG. 13 (a), a pair of straight portions 30d, 30d and a semicircular curved line connecting both ends thereof separately. Using an elliptical coil material 3d integrally formed with the parts 31d, 31d, the same procedure as in FIGS. 5 and 9 is carried out to form an armature coil 3 as shown in FIG. 13 (b). I do.

The armature coil 3 has a rectangular cross section made of a flat band-shaped conductor wound a plurality of times in two rows each time. The armature coil 3 formed by using the coil material 3d is Similarly to the armature coil 3 formed using the coil material 3c shown in FIG. 9, the armature coil 3 has a large inductance, and fine adjustment of the inductance can be easily performed by adjusting the number of turns.

The coil material 3d is made of a conductor in which the strip is folded in the middle part in the reverse direction and arranged in two rows in the width direction. By turning, it can be constituted by one winding step. When such a winding configuration is adopted, as shown in FIG.
Can be used as coil ends for power supply, and connection for power supply can be easily performed.

FIG. 14 is a view showing various forms of formation of the folded portion B. The folded portion B shown in FIGS.
Can be obtained by cutting a wide band-shaped conductor in the longitudinal direction with an appropriate length of the end portion thereof, and by forming a folded portion B shown in FIG.
Can be formed by folding the middle part of the continuous strip conductor twice.

FIG. 15 is a perspective view of an armature coil according to the seventh invention of the present invention, and FIG. 16 is a plan view of a conductor piece used for the configuration of the armature coil. The armature coil 6 of the present invention includes:
A straight portion 61 and, at both ends thereof, inclined portions 62, 62 provided so as to be inclined at substantially equal angles in opposite directions in one plane with respect to the extension lines to the respective sides. As shown in FIG. 16, a plurality of conductor pieces 60 formed in a semi-hexagonal shape in plan view are used, and these conductor pieces 60, 60... The stacks are stacked in the thickness direction, the stacks are turned in the opposite direction, the tips of the inclined portions 62, 62 are overlapped in the thickness direction, and combined so as to form a hexagonal shape in a plan view. The overlapping portions at the ends are integrally connected by connecting pins 63 penetrating therethrough. At the tips of the inclined portions 62, 62 of the conductor piece 60 shown in FIG.
a, 64a are provided.

The armature coil 6 thus configured is
A pair of linear coil portions that are parallel to each other are configured by the linear portions 61, 61 of the plurality of conductor pieces 60, 60,.
A coil end portion is formed by the inclined portions 62, 62 of the plurality of conductor pieces 60, 60,... Of each set, and the connection pins 63 that pass through them at the same time, similar to the armature coil 3 of the first invention. In the form of

FIG. 17 is a plan view showing a state in which the armature coil 6 as described above is mounted on the armature core 1. The armature coil 6 has a plurality of slots 1 arranged in parallel with the armature core 1.
2 adjacent to each other via one slot 10 between 0 and 10
Straight section of each set of conductor pieces 60, 60 ...
An armature coil is formed by inserting and holding the linear coil portions 61, 61,... Respectively. At this time, an inclined portion connected to the linear coil portion inserted at an upper position inside the appropriate slot 10 is formed. Are crossed in opposite directions to each other without interfering up and down with the inclined portions 62, 62 connected to the linear coil portion inserted at the lower position inside the slot 10 adjacent to one side. 3 and the mounting in the same manner as in FIG. 3 is realized, and the space factor of the coil in each slot 10 can be increased.

Further, using the conductor piece 60 having a rectangular cross section as shown in FIG.
Can be configured with a rectangular cross section as a whole,
The coil can be inserted densely in each slot 10, and the space factor of the coil in each slot 10 can be further increased.

Further, the plurality of conductor pieces 60, 60,..., Which are divided into two sets and stacked as described above, are overlapped without securing a gap a (see FIG. ,
The connection by 63... Makes it possible to realize a close overlap of the linear coil portions in each slot 10, and it is possible to further increase the space factor of the coil in each slot 10.

The connecting means for connecting the conductor pieces 60 is not limited to the above-mentioned connecting pins 63, 63, but may be, for example, a tightening ring for tightening the ends of the inclined portions 62, 62 at once. Other connecting means may be used, but this connection can be reliably and easily realized by using the connecting pins 63, 63,....

Although the illustrated armature coil 6 is configured by combining a plurality of conductor pieces 60, 60,..., It may be configured by combining one conductor piece 60. However, in this case, there is a problem that it is difficult to obtain a large inductance, and it is difficult to finely adjust the inductance.

In the above embodiment, the example of mounting the armature coil on the linear armature, such as the stator of the linear motor, has been described. Multiple slots 10,
It is needless to say that the armature coil of the present invention can be applied to a cylindrical armature in which 10...

[0066]

As described in detail above, the first to fifth embodiments of the present invention are described.
In the armature coil according to the present invention, the inclined portions and the vertical connecting portions are provided at the coil end portions on both sides of the linear coil portion to be inserted and held in the slots arranged in parallel with the armature core, so that the space factor inside each slot is provided. Can be increased without being affected by the overlap of the coil end portions.Also, since the linear coil portion and the coil end portion are formed of a linear or flat strip conductor wound a plurality of times, it is possible to secure a large inductance. , Fine adjustment of the inductance becomes possible,
It is possible to flexibly cope with the manufacture of an armature having good characteristics.

Further, in the method for manufacturing an armature coil according to the sixth aspect of the present invention, an elliptical cross section having a straight portion and a curved portion formed by winding a linear or flat conductor a plurality of times is provided. Since the coil material is used, the above-described armature coil can be easily manufactured without using a dedicated device.

In the armature coils according to the seventh and eighth aspects of the present invention, a plurality of conductor pieces each having a half-hexagonal shape in plan view are combined and connected to each other. An armature coil that can be installed in the provided slot with a large space factor, can secure a large inductance, and can finely adjust the inductance can be easily configured. The present invention has excellent effects, such as being able to flexibly cope with the manufacture of armatures having characteristics.

[Brief description of the drawings]

FIG. 1 is a perspective view of an armature coil according to the present invention.

FIG. 2 is a perspective view of a stator of a linear motor configured using the armature coil shown in FIG.

FIG. 3 is a plan view showing a positional relationship of coil end portions on both sides of an armature core in the stator shown in FIG.

FIG. 4 is an arrow view taken along line IV-IV in FIG. 3;

FIG. 5 is an explanatory diagram of a manufacturing procedure of the armature coil shown in FIG.

FIG. 6 is an explanatory diagram of a manufacturing procedure of a coil material used for the armature coil of FIG. 1;

FIG. 7 is a perspective view showing another embodiment of a coil material used for manufacturing the armature coil of FIG. 1;

8 is a perspective view showing an example of an apparatus used for manufacturing an armature coil according to the procedure shown in FIG.

FIG. 9 is an explanatory diagram of another manufacturing procedure of the armature coil according to the present invention.

FIG. 10 is a perspective view of a stator of a linear motor configured using the armature coil shown in FIG. 9;

11 is a plan view showing a positional relationship between coil end portions on both sides of an armature core in the stator shown in FIG.

FIG. 12 is a perspective view showing another embodiment of the armature coil according to the present invention.

FIG. 13 is an explanatory diagram of another manufacturing procedure of the armature coil according to the present invention.

FIG. 14 is a view showing various forms of forming a folded portion of a coil material used for the armature coil of FIG. 13;

FIG. 15 is a perspective view of an armature coil according to a seventh invention of the present invention.

16 is a plan view of a conductor piece used for the armature coil shown in FIG.

FIG. 17 is a plan view showing a state where the armature coil shown in FIG. 15 is mounted on an armature core.

FIG. 18 is an explanatory view of a conventional winding method adopted for a stator of a linear motor.

FIG. 19 is a partially cutaway side view of the armature formed by the winding method shown in FIG. 18;

[Description of Signs] 1 armature core 3 armature coil 6 armature coil 30 linear coil part 31 coil end part 32 inclined part 33 vertical connecting part 60 conductor piece 61 linear part 62 inclined part 63 connecting pin

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (8)

[Claims] 1. An armature made of a magnetic material, wherein a pair of linear coil portions that are parallel to each other and a coil end portion that separately connects both ends thereof are integrally formed by a conductor wound a plurality of times. Among the multiple slots arranged in the core,
In an armature coil that constitutes an armature by inserting and holding the pair of linear coil portions in separate slots located apart in the juxtaposition direction, the coil end portion is provided at an end of the pair of linear coil portions. And a vertical connecting portion which connects the inclined portions substantially perpendicularly to each of the inclined portions continuously connected to each other with an inclination opposite to the extending direction. Armature coil characterized. 2. The conductor according to claim 1, wherein the conductor is a linear conductor wound in multiple rows each time, and each of the plurality of conductors forming the inclined portion is substantially parallel to each other and is substantially parallel to the vertical connecting portion. The armature coil according to claim 1, wherein the armature coil is arranged along a plane passing through the armature coil. 3. The armature coil according to claim 1, wherein the conductor is a flat band-shaped conductor wound in a single row each time. 4. The armature coil according to claim 1, wherein the conductor is a flat band-shaped conductor that is folded in the width direction and arranged in two rows, and is wound with the folded portion inside. 5. The linear coil portion according to claim 1, wherein the linear coil portion has a rectangular cross section having two sides substantially parallel to an extending direction of the vertical connecting portion. Armature coil. 6. The method for manufacturing an armature coil according to claim 1, wherein both sides of a pair of straight portions parallel to each other are formed into an arc shape in a plane in which the straight portions are arranged. Using a coil material composed of a conductor wound in a plurality of turns having an elliptical planar shape, the pair of straight portions are deformed with an appropriate length on each side. And the bent portions are restrained so as not to be deformed, and the restrained portions of the pair of straight portions are moved in a direction substantially perpendicular to the juxtaposed surfaces in substantially opposite directions to each other, and the straight portions are moved. Wherein the constrained portion forms the straight coil portion, the constrained portion of the curved portion forms the vertical connecting portion, and the non-constrained portion of the straight portion forms the inclined connecting portion. . 7. A plurality of parallel coil portions and a coil end portion respectively connecting both ends thereof to each other, and a coil end portion respectively connecting the both ends thereof, and a plurality of slots arranged in parallel to an armature core made of a magnetic material. In each separate slot located away from the setting direction,
In the armature coil that constitutes the armature by inserting and holding the pair of linear coil portions, on both sides of the linear portion that constitutes the linear coil portion, inclined portions that are inclined in directions opposite to each other with respect to the extension direction thereof are provided. Conductor pieces formed in series, and one or each of the plurality of conductor pieces in which the tips of the respective inclined portions are overlapped in the thickness direction to form a hexagon in plan view, And a connecting means for connecting at an end of the armature coil. 8. The armature coil according to claim 7, wherein said connecting means is a connecting pin which passes through the overlapping portion of said inclined portions in a thickness direction.