JPS59149753A - Stator coil - Google Patents

Abstract

PURPOSE:To obtain a motor which has highly stable output by laminating to displace the coil poles of the same phase between coil sheets in the sheet-shaped coils formed of patterned conductors from coil conductors in the amount of npi. CONSTITUTION:Coil poles are formed by forming spiral pattern conductors 28 by etching or plating on the surface of a thin insulating sheet 25. The surface of the conductors 28 is covered with insulating coating material 26. Sheet coils 60, 61 formed in this manner are composed of 3-phase 6-pole coil configuration on both front and back surfaces in such a manner that the coil pole positions are completely superposed on the front and back surfaces in the same phase coil poles. The coils 60, 61 of such structure are laminated by electrically displacing at 2pi in the circumferential direction in the coil poles of the same phase.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a sheet coil for a motor stator in which the coil conductor is formed of a patterned conductor by etching, plating, etc., and is particularly easy to manufacture, low cost, thin, and stable in output. Regarding the structure obtained.

[Prior art]

Figure 1 is a side view of the structure of a conventional winding board coil, (α) is a schematic diagram of a single coil pole, and (b) is a fixed structure in which multiple (6) coil poles of (α) are arranged in a plane. FIG. 10C is a plan view of the child coil, FIG. This wire-wound coil has a 3-phase 6-pole structure, (d) K
As shown, the configuration is such that a rotor magnet of 8 poles magnetized at equal division angles is driven to rotate. Each coil pole is formed by winding a conducting wire around a triangular core. The conductor used is a self-bonding wire whose surface is coated with an adhesive that melts with heat or alcohol. Install alcohol immersion and heating processes during or after winding work! Glue the lines together with adhesive. The coil poles of the gold phase are electrically shifted at an angular pitch of -π and adhered and fixed onto the surface of the wiring board 8. The two terminals 5 of each coil pole are tangential to the wiring pattern on the wiring board with solder or the like. The winding start terminal is connected at the center of the coil pole, and the winding end terminal is connected at the outside of the coil pole. In this structure, two coil poles located at axially symmetrical positions constitute in-phase coil poles. In this example, the phase order is clockwise, the coil pole 1α is the U phase, and the coil poles 1c and 1d are V phase.
The phase and coil poles 1g and 1f are the W phase.

The ends of each coil are connected by pattern conductors on the surface of the wiring board 8.

Figure 2 is a side view of the structure of a conventional wire-wound coil of another shape, (α) is a plan view of one phase, (h) is a cross-sectional view of the laminated layers, and (C
) is a schematic side view of the structure of a flat brushless motor using such a coil. This wire-wound dust coil has a 3-phase 8-pole structure, and is placed on the solid foot Meek 130 face facing the magnetic pole face of a magnetized magnet in the same way as the flat rotor magnet shown in Fig. 1(d). Laminated and fixed to form the motor electromagnetic part.

The coil for one phase is formed of one flat coil with eight poles, and the terminals of each adjacent coil pole are connected in a continuous manner in a single stroke, and the coils are wound in opposite directions. The conductor used is a self-bonding wire whose surface is coated with an adhesive that melts with heat or alcohol. A special winding machine is used to manufacture the coil. The wire is sequentially and continuously wound around eight triangular winding cores arranged in an annular manner while being heated and dipped in alcohol, and finally both the front and back sides are heated and pressed to form a flat shape. Two terminal leads are provided for each phase. These six flat coils 1'1'', 1'' are electrically connected to -π in the circumferential direction.
Stack and fix concentrically at different angles. The terminal 5' of each coil is manually soldered and connected to the patterned surface of the wiring board 19 fixed to the side surface.

Conventional coils with such a configuration have the following problems: (1) Peeling of the insulation coating on the terminals and damage to the wiring board surface.
3. Automating the connection requires a long time and the manufacturing cost of the coil is high.

(2) In order to make the coil layer thinner, a thinner motor is constructed and the V is smaller.

(3) You cannot freely choose the coil pole shape.

(4) Since the wire is wound while applying tension, thin wires are likely to break t2.

(5) Performance becomes unstable because it is difficult to make the shape and dimensions of each coil pole uniform.

(6) Pole arrangement accuracy is low.

Furthermore, the example shown in FIG. 1 has the following problem.

As a wiring board, it is necessary to have a plane rigidity exceeding a predetermined level and high heat resistance. Therefore, by increasing the board thickness,
Because it is necessary to use expensive materials with high heat resistance,
This results in a stator coil with low efficiency and high cost. Since the number of in-phase coil poles is small at two, the effect of averaging the output between poles and correlation is low. Therefore, the motor output and stability are low.

4.

Furthermore, in the example shown in FIG. 2, the thickness of the connecting wire between the coil poles becomes an ineffective thickness, which causes a decrease in motor efficiency. Since it is difficult to increase the pole area of the winding, the winding coefficient (
The rate at which the coil interlinks with the magnetic flux in the field is low, and the amount of magnetic flux interlinking to each phase coil differs due to the difference in magnetic field strength at the coil position, which tends to cause torque ripple in the motor.

There are other problems.

[Object of the Invention] An object of the present invention is to improve the drawbacks of the prior art and provide a motor coil that is thin, highly efficient, low cost, and has a structure suitable for mass production.

[Summary of the invention]

In order to achieve the above object, the stator coil of the present invention has the following features: (11) The coil conductor is a sheet-like coil formed of a patterned conductor by etching, plating, etc.; le π(
A structure in which multiple coil sheets are stacked so that they are offset by a distance of 1, 2.3... Its main feature is that the coil poles corresponding to the phases or the coil poles of some phases are configured so that they partially overlap with the coil poles on one side with an insulating material in between.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on examples.

FIG. 3 shows the basic structure of the sheet-like coil constituting the stator coil of the present invention, (α) is a plan view, and (b) is a cross-sectional view. A spiral pattern conductor 28 is formed on the surface of the thin insulating sheet 25 by etching, plating, etc. to form a coil pole. When this patterned conductor 28 is formed on both the front and back surfaces of the insulating sheet 25, it is possible to obtain a large number of turns with low resistance and to widen the coil pole area, thereby improving coil efficiency and easily constructing a high efficiency motor. In addition, the coil pole shape is uniform, allowing for high pole arrangement accuracy and stable motor output. The surface of the pattern conductor 28 is covered with an insulating coating material 26. In this structure example, a pattern conductor 2 is placed on the surface of a thin insulating film 25.
In addition to this example, there are also structural examples in which the pattern conductor 28 is formed separately in advance and then fixed on the thin insulating sheet 25. The basic structure and effects of the finish are the same in either case.

4 and 5 are views of a first embodiment of the stator coil of the present invention. 4(α) is a surface plan view of the first sheet coil 60, <h> is a surface plan view of the second sheet coil 61, and FIG. 5(α) is a surface plan view of the first sheet coil 60. Second sheet coil 60.
61 is a laminated cross-sectional view, and (b) and (C) thereof are each coil pole connection diagram. Similar to the conventional example, this example is also a structural example of a 3-phase 6-pole coil that drives a rotor magnet magnetized equally divided into 8 magnetic poles in a fan shape in the circumferential direction in 3 phases, and is constructed using two sheet coils. This is an example. The first and second sheet coils 60 and 61 each have a 6-phase, 6-pole coil configuration on both the front and back surfaces, and the coil pole positions of the respective sheet coils are such that the same phase coil poles on the front and back sides completely overlap each other. The entire circumference of the seat surface is divided into six equal parts, and each part has two coil poles on each side. Medium, l, poles located at axially symmetrical positions with respect to the centrum are in phase.

In this stator coil, the first and second sheet coils 60 and 61 having such a structure are stacked with nine in-phase coil poles electrically shifted by 2π in the circumferential direction. The coil pole 40α on the surface of the first sheet coil 60.

40b and the coil pole 40'α on the back side, 40'b is U phase,
Coil poles 41α and 41h on the front side and coil pole 41 on the back side
'a41'b is the V phase, the front side coil poles 42a, 42h and the back side coil poles 42'α, 42'h are the W phase, and in the second sheet coil 61, the front side and coil poles 40c, 40d
And the coil poles 40'C, 40'd on the back side are U phase, the coil poles 41C, 41d on the front side and the coil poles 41Q, 4 on the back side.
1d' is the V phase. The front side coil poles 42c and 42d and the back side coil poles 42'C and 42'd are the W phase. The layers are stacked with a clockwise shift of 2π at the corners and a shift of 7 mechanical angles. In each sheet coil, the in-phase coil poles on the front and back sides are connected through a through hole in the center of each coil pole. That is, the U phase of the first sheet coil 60 has through holes 50α, 50d, the V phase has through holes 50C, 50f, and the F phase has through holes 50.
b.

50g, second (U phase of the D sheet coil 61 has through holes 50y, 50j, V phase has through holes 50i
, 501°W phases are connected through through holes 50A, 50&. In this example, the final terminals 39, 43, and 45 of each phase are further connected at one point, and the whole is connected in a star shape. With such a structure,
(1) Since the structure is such that the coil poles of each phase of the second one-sheet coil 61 are arranged and stacked between the coil poles of each phase of the first sheet coil 60, the pattern conductor of the coil is ．． Parts of the second sheets 61 are overlapped with each other. Therefore, even if the insulating sheet 25 is made very thin, the planar rigidity of the stator coil can be increased. (2) Since the in-phase coil poles can be distributed and arranged in four axially symmetrical positions, when incorporated into the motor electromagnetic part, the torque generating part at each moment is in an axially symmetrical position, and therefore the motor.

Rotation can be stabilized. (3) Since the back electromotive force value of each phase coil can be set to the same value regardless of the magnetic flux distribution of the motor electromagnetic section, the motor output can be stabilized. (4) Effects such as increasing the coil pole area and increasing the coil winding coefficient can be obtained.

FIG. 6 is a diagram showing a second embodiment of the stator coil of the present invention.

This example also has a 6-phase hexapole structure and a 2-sheet laminated structure like the first example. The figure (a) shows the first sheet coil 62.
(h) is a plan view of the back surface, <C) is a plan view of the surface of the second sheet coil 63, and @) is a plan view of the back surface. In this example, the coil pole positions of the same phase on the front and back surfaces of each sheet are electrically shifted from each other by 2π, and the first sheet coil 62 and the second sheet coil 66 have the coil pole positions of the same phase. The layers are stacked electrically shifted by π. As in the first embodiment, through holes are used to connect the coil poles on the front and back sides of each sheet coil. With such a structure,
(1) Since the coil pole positions of the same phase can be electrically shifted by π with respect to the central axis and arranged in eight locations around the entire circumference, the effect of averaging the output per motor rotation can be improved compared to the case of the first embodiment. can be further improved and stable output can be obtained.

(2) Since the first or second sheet coil can each have a structure in which the coil pattern conductors on the front and back surfaces are partially overlapped, the planar rigidity of the coil can be further increased. Other effects are the same as in the first embodiment.

Although the first and second embodiments described above have a structure in which two sheet coils are laminated, a structure in which three or more sheet coils are laminated may also be used.

FIG. 7 is a diagram showing a third embodiment of the stator coil of the present invention, (a
) is a developed plan view of the sheet coil, and (b) is a cross-sectional view. This example also has a structure based on three phases and six poles, similar to the first and second examples. This example differs from the previous example in that the sheet coil is formed from a single continuous body.

An insulating sheet 2 is placed between the coil surface parts where the coil poles are arranged.
5 in a row. The first sheet coil part 64 and the second sheet coil part 64
The pattern conductor for connecting the coil poles of the sheet coil portion is also provided in this continuous portion. The first sheet coil portion 64 and the second sheet coil portion 65 are folded and laminated by bending the continuous portion 70. In this case, the coil poles of the same phase are electrically shifted by 2π between the coils 11 and 1, as in the first embodiment. Such a structure eliminates the need for connections between the sheet coil layers after lamination, resulting in a low-cost and highly reliable stator coil. others,
Effects similar to those of the first embodiment can be obtained.

In addition to the above embodiments, the same applies to the case where the sheet coil portions are stacked in three or more layers. Further, in the above example, the gold phase coil poles are provided on one plane, but it is also within the scope of the present invention to configure all the phase coil poles on the front and back sides of the sheet, and the effect is the same as above. □ Figures 8-210 are views of the fourth embodiment of the stator coil of the present invention, Figure 8 (α) is a front view of the sheet coil, Figure (h) is a back view of the sheet coil, and Figure 9 is a view from the front. FIG. 10, which is a plan view showing the back side, is a wiring diagram of each coil pole. This example is a structural example of a 3-phase 6-pole coil that drives a rotor magnet magnetized equally divided into 8 magnetic poles in a fan shape in the circumferential direction in 3 phases, and both the front and back surfaces have a 6-phase configuration. The entire circumference is divided into six equal parts, and each monk has two coil poles on each side. □Pair 9 on the central axis? 2
Poles located at axially symmetrical positions are in phase. On the front and back sides, the in-phase coil poles are electrically shifted by 2π. With this structure, the front and back coil electrode conductors can be partially overlapped with each other with the insulating sheet 25 interposed therebetween. This coil has coil poles 140α, 140A, 140c in clockwise phase order.
, 140d is the U phase, and 141α.

141b, 141C, 141d are V phase, 142α, 14
2A, 142c, and 142d are W phases, and the coil poles of each phase are connected in series. The U phase is terminal 130 - front side coil pole 140α - through hole 145α - back side coil pole i40. - Through hole 145y - Coil pole 1 on the surface
'40h - Through hole 145g - Coil pole 1 on the back side
40d - Order of through holes 150, r phase is terminal 131
- Coil pole 141α on the front side - Through hole 145d - One through hole 145j in the through hole 145 - Coil pole 141o on the back side - Through hole 145b - Coil pole 141h on the front side - Through hole 145h - Through hole 14
5m - Through hole 1451 - Coil pole 141 on the back side
d - The order of through holes 151, W phase is terminal 132 - front side coil pole 142α - through hole 1asc - 11 side coil pole 142d - through hole 145 - front side coil pole 142h - through hole 145f - back side coil pole 142C - Connect the through holes in the order of 152 so that the opening angle of each coil pole is smaller than 60" and each through hole in the center of the pole is located in the space between the coil poles on the opposite side. With this coil pole arrangement structure, the coil poles clockwise in the order of U, V, and W phases partially overlap each other on the front and back surfaces, and in the radial conductor portion, the conductors on both the front and back surfaces are at a certain angle to each other. to cross each other.

With this structure, (1) a three-phase coil can be configured with one sheet coil; (2) Since the pattern conductors on the front and back sides overlap, the planar rigidity of the sheet coil can be increased.
Handling during production and assembly becomes easier, and the conductor space factor can be improved by reducing the thickness of the insulating sheet. Additionally, the number of laminated sheets can be reduced to create a thinner coil. (3) Since the back electromotive force value of each phase coil can be made the same value regardless of the magnetic flux distribution of the motor electromagnetic section, the motor output can be stabilized.

(4) Since the in-phase coil pole positions are arranged at four equally angularly spaced positions on the circumference, the torque generating portion at each instant is in an axially symmetrical position, making it possible to stabilize motor rotation. (5) The coil pole area can be increased, the winding coefficient of the coil can be increased, and the coil efficiency can be increased. Effects such as this can be obtained. In the above embodiments, the back surface has the same number of phases and coil poles as the front surface, but it is also within the scope of the present invention to configure the back surface to have a reduced number of phases or a reduced number of coil poles.

〔Effect of the invention〕

According to the present invention, with the stator coil, (1) Since the coil poles of the same phase can be arranged axially symmetrically over the entire circumference, the effect of averaging the generated torque is high, and therefore a motor with high output stability can be configured. .

(2) Even in a coil in which all phase coil poles are arranged in the plane of the sheet, the plane rigidity of the coil can be increased because the patterned conductors of the coil poles can be overlapped at least partially between the sheets by sheet lamination. A coil with a thin profile and high flatness can be obtained.

(3) Since it is manufactured by etching, plating, etc. and is in sheet form, it is easy to manufacture and assemble and is low cost.

(4) Since the coil pole position accuracy and pole shape uniformity are highly improved, the output can be stabilized from a single point.

(5) Since the conductor space factor and winding coefficient can be increased, motor efficiency can be improved.

Effects such as this can be obtained.

[Brief explanation of the drawing]

Figure 1 shows an example of a conventional stator coil, where (α) is a schematic diagonal diagram of a single coil pole, (h) is a plan view of the stator coil, and (C) is a cross-sectional view of (b). , (d) is a plan view of a rotor magnet that is combined with this stator coil to constitute a motor, FIG. 2 is a diagram showing another example of a conventional stator coil, and (α) is a diagram showing one phase (b) is a cross-sectional view of the stacked state, (c) is a schematic cross-sectional view of a motor using such coils, FIG. 6 is a diagram showing the basic structure of the present invention, and (α) is Main part ・16 ・ Plan view, (b) is a sectional view, FIG. 4 (a) (A) is a plan view showing one implementation of the present invention, and FIG. 5 (α) is a layered coil of FIG. 4. 5. <b> and <c are the wiring diagrams of the same coils. FIGS. 6 (α) to (d) are plan views of an embodiment in which coils are formed on the front and back sides of the sheet. The figure shows another embodiment of the present invention, in which (α) is a developed plan view;
(b) is a sectional view, FIG. 8 is a diagram showing still another embodiment of the present invention, (α) is a plan view, (h) is a plan view of the back side, and FIG. 9 is a view from the front side to the back side. Plan view seen through the water, 1st
Figure 0 is a wiring diagram of each coil pole. ←--Figure/death =, Ii! -jllL, na1 bustling 428.
28'... Patterned conductor 25.125.
・・・・・・・・・Insulating sheet Kiku1 Figure (4) (shi) Second closed (a) ((,') First figure 3 (fl) (shi) Figure 4 (shi1-

Claims (1)

[Claims] 1. In a stator coil for a motor having an m-phase (m = 1.2, 3...) configuration in which a plurality of coil poles are arranged in the circumferential direction, A coil sheet consisting of coil poles formed by spirally forming a patterned conductor by etching, plating, etc. is arranged in a thin insulating plane JICm phase, and the coil poles of the same phase are arranged between the coil sheets by
A stator coil characterized by a structure in which layers are stacked with positions shifted in the circumferential direction by 1, 2.3-.). 2. m-phase (with multiple coil poles arranged in the circumferential direction)
m = 1.2.3...)), a patterned conductor is formed spirally on the front and back surfaces of the coil through a thin insulating material by etching, plating, etc. It has m-phase coil poles on at least one side of the insulating material, and the coil poles of the same phase on the front and back surfaces of the insulating material are electrically 11Cnπ (rL=
i. 2.3. A stator coil characterized by being arranged with positions shifted in the circumferential direction by ......).