JPS6349468B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for forming a stator winding of a rotating electric machine, and in particular to a method for forming a stator winding of a rotating electric machine, in particular a rotor equipped with a cylindrical permanent magnet and a rotor arranged opposite to the permanent magnet with an air gap therebetween. The present invention relates to a method of forming a stator winding of an improved rotating electric machine including a stator and a stator winding.

(Prior art) Fig. 1 shows a conventional electric motor equipped with permanent magnets in the rotor, in which 1 is a stator core, 2 is a stator winding, and 3 is a motor equipped with a permanent magnet in a rotor.
is a stator housing, 4 and 5 are end brackets, 6 is a bearing, 7 is a rotor consisting of a permanent magnet, 8
is the rotor axis, 9 is the gap between the stator and rotor,
Reference numeral 10 denotes a magnetic detector provided on the end bracket 5 to detect the magnetic flux from the permanent magnet of the rotor 7.

As shown in FIG. 1b, a plurality of, for example, eight magnetic poles 1-2 protrude radially toward the center from the outer yoke portion of the stator core 1, and the pole piece at the tip rotates through the air gap 9. A groove 1-3 is provided between the pole pieces of each magnetic pole 1-2, and a winding 2-1 is wound around each magnetic pole 1-2. -1 are connected to each other to form a plurality of phases.

The windings of each phase are connected to a power source via an energization control device (not shown) controlled by the output of the magnetic detector 10, and the windings 2 correspond to the magnetic poles of the permanent magnets of the rotor 7.
-1 is sequentially energized to continuously generate rotational force in a fixed direction and operate as an electric motor.

Therefore, in the conventional electric motor shown in FIG. 1, an iron core portion having a large number of magnetic poles 1-2 arranged thereon as shown in FIG.
A winding 2-1 is wound around each magnetic pole 1-2, and this winding 2
-1 had a defect that required a lot of skilled manpower, such as connecting the terminals in several phases, which increased production costs.

(Object of the Invention) The present invention provides a method for forming a stator winding of a rotating electrical machine that eliminates the above-mentioned drawbacks.

(Structure of the Invention) A method for forming a stator winding of a rotating electrical machine according to the present invention is a method for forming a stator winding of a rotating electrical machine comprising a rotor equipped with a permanent magnet and a stator disposed opposite to the permanent magnet with a gap therebetween. The process of arranging the conductors continuously in a zigzag manner in the width and length directions at a predetermined pitch on the insulator, and folding and overlapping the strip-shaped insulator along the center line to form a cylindrical shape. The conductor placed on the strip-shaped insulator is made of one continuous wire, and the base is in contact with the center line that roughly bisects the width of the insulator. 1/2
An isosceles triangle with a height of It is characterized by a plurality of pieces being arranged in succession along a figure connected by .

(Embodiments of the Invention) A method of forming a stator winding of a rotating electric machine according to the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 4, a thin conductor is formed on a thin strip-shaped insulator 22-1 by a photo-etching method, and this strip-shaped insulator is attached to the stator core 1.
The stator winding 12 is wound into a cylindrical shape to have an outer diameter equal to the inner diameter D ₀ of the stator core 11, and is fixed to the inner circumferential surface of the stator core 11 as shown in FIG. The rotors 17 of the windings 12 are arranged opposite to each other with a gap 19 interposed therebetween.

Further, the stator core 11 is formed by punching hollow disks having holes large enough to accommodate the stator windings 12 from iron plates and stacking them.

The stator winding 12 of the present invention is manufactured by photo-etching a conductor foil pasted on a thin strip-shaped insulator, so if the original is made accurately, then a large number of stator windings with exactly the same size can be manufactured. Since it can be easily produced, there is no need for much manpower for connections between windings, etc.

In this embodiment, the width of the band-shaped insulator 22-1 is made slightly longer than twice the axial length of the stator core 11, and the windings are placed above and below the center line M that roughly bisects the width. The conductors 22-2 and 22-3 to be formed are arranged in a continuous isosceles triangular shape. That is, as shown in FIG. 4a, the stator winding starts from terminal A and connects the isosceles triangular chevrons ab^, cd^, ef^, gh^ in succession to the end of the insulator 22-1. From this end, enter the lower half of the center line M, and from the straight line p parallel to the center line M, create a straight line q parallel to the center line M by continuing the mountain shape of the isosceles triangle with ij^, kl^, mn^. A continuous conductor is formed by concentrically disposing the conductor a plurality of times and connecting the terminal end to the terminal B. All of the isosceles triangles have the same shape, and the length of the base where the two sides touch is equal to the single pole pitch of the opposing rotor, and the arrangement of the upper triangle and lower triangle is 1/1 of the base.
Shift it by 2 in the circumferential direction. Next, as shown in FIG. 4b, the strip-shaped insulator 22-1 is bent in two along the center line M to form an upper conductor 22-2.
and the lower conductor 22-3.

Now, as shown in Figure 4b, when current is passed through the stator winding in the direction of terminals A → B, the current flows through the chevron-shaped conductor sides as shown by the arrow, and flows in the same direction between all conductor sides and the permanent magnet. A force acts to move the rotor 27 in the direction of the arrow in FIG. 4f. However, rotor 2
When 7 rotates by 1/2 pitch of the magnetic pole, the polarity of the magnet will be reversed, so connect terminal B to the stator winding at this position.
→A If you switch the direction of current flow, rotational force will continue to be generated in the same direction and it will function as an electric motor.
The means for switching the direction of the current flowing through the winding at the position where the polarity of the opposing magnets changes may be any means such as a commutator and brush or an electronic switch.

The conductor arrangement shown in FIGS. 4a and 4b is for the case where the rotor has eight poles, but the basic form of this arrangement is as shown in FIG. 4c. That is, isosceles triangular chevrons ab^ and ij^, which correspond to one pitch of permanent magnets whose base lengths are opposite to each other on both sides above and below the center line M, are arranged by moving the base positions by 1/2 pitch in the direction of movement. The figure that connects the lower ends of each chevron with straight parts p and q parallel to the center line becomes the smallest unit, and if the parts containing the straight parts p and q are placed at the front and rear parts, the diagonal part between them can be You are free to provide as many as you need. For example, in the example shown in Figures 4a and 4b, the number of poles of the permanent magnet of the rotor is eight, and the number of conductors of the stator that opposes this are arranged in the number that goes around the cylinder around the rotor. It is also possible to easily increase the number of turns per pole by providing the required number of chevron-shaped oblique portions so that the number of turns per pole can be increased multiple times. Also, in Figures 4a and 4b, the straight parts p and q are both placed below the center line M, but the effect is the same even if they are placed above and below the center line M as in Figure 4c. be. Figure 4d
is the one shown in FIG. 4c, folded along the center line M, and the top and bottom are stacked. FIG. 4e is an end view of FIG.
2 and the lower conductor 22-3 are connected by a connecting portion 22-4, and are characterized in that there is no connecting part in the middle.

FIG. 5 shows another embodiment of the present invention configuring a multi-phase stator winding. In this example, as shown in _FIG . Line φ ₂
are moved by 1/4 pitch of the pole pitch of the opposing permanent magnet. In this way, a two-phase winding having a phase of 90 degrees in electrical angle can be constructed. Furthermore, as shown in Fig. 6, if three sets of windings φ ₁ , φ ₂ , and φ ₃ are moved by 1/3 pitch of the opposing magnetic poles, a three-phase winding can be constructed. After that, any polyphase winding can be constructed in the same manner.

In another embodiment of the present invention, as shown in FIG. 7, an independent frequency generator winding FG may be provided in addition to the motor windings φ ₁ to _{φ o} .

Further, as a further embodiment of the present invention, as shown in FIG. 8, a conductor portion 24 is provided for attaching a magnetic detector at a position in a fixed relationship with the winding at the end of the strip-shaped insulator.
, thereby increasing the accuracy of the mounting position of the magnetic detector.

Further, as shown in FIG. 2, the width of the strip-shaped insulator is partially widened, and terminals 23 and wiring portions 25 for attaching electronic components constituting the energization control device that drives the motor are placed in positions that do not overlap the windings. Winding terminal 23
The conductor portions 26 and 27 that connect the conductor and the energization control device can also be formed integrally.

(Effects of the Invention) As described above, the method of the present invention has the advantage of reducing the number of connection points for each coil element, reducing manufacturing costs, and increasing the number of effective coil elements.

[Brief explanation of drawings]

FIG. 1a is a longitudinal sectional front view of a conventional electric motor, FIG. 1b is a longitudinal sectional side view thereof, FIG. 3a is a longitudinal sectional front view of a rotating electrical machine to which the present invention is applied, and FIG. 4a and 4b are explanatory diagrams of the stator winding in another embodiment of the present invention, FIG. 4f is an explanatory diagram of the rotor, and FIGS. The explanatory diagrams, FIGS. 5 to 8, and FIG. 2 are explanatory diagrams of stator windings in still other embodiments of the present invention, respectively. 3... Stator housing, 4, 5... End bracket, 8... Rotor shaft, 11... Stator core, 12... Stator winding, 17... Rotor, 19
...Void.

Claims (1)

[Scope of Claims] 1. In a rotating electrical machine consisting of a rotor equipped with a permanent magnet and a stator disposed opposite to the permanent magnet with an air gap in between, conductors are arranged at a predetermined pitch on a strip-shaped insulator. The method consists of a step of arranging the insulating strips continuously in a zigzag pattern in both the direction and the longitudinal direction, and a step of folding and stacking the insulating strips along the center line and rolling them into a cylindrical shape. The conductor placed on the top consists of a single continuous wire, forming an isosceles triangle whose base is parallel to and touches the center line that roughly bisects the width of the insulator, and whose height is approximately half the width. Multiple lines on both sides of the center line, with each base moved by 1/2 the length of the base, and along the shape connecting the lower ends of each of the two sides of the triangle on both sides with a straight line parallel to the center line. A method for forming a stator winding of a rotating electric machine, characterized in that the stator winding is continuously arranged. 2. A patent claim in which the length of 1/2 of the base of the isosceles triangle is equal to the length of one magnetic pole of the opposing rotor, and the number of sides of the triangle is an integral multiple of the number of magnetic poles of the rotor. A method for forming a stator winding of a rotating electrical machine according to item 1. 3. In the patent claim, the conductors disposed on the strip-shaped insulator forming the stator winding consist of two groups disposed at 90 degrees in electrical angle in the longitudinal direction, forming a two-phase winding. A method for forming a stator winding for a rotating electric machine according to scope 1 or 2. 4. A patent claim in which the conductors disposed on the strip-shaped insulator forming the stator winding consist of three groups disposed at positions of 120 electrical degrees in the longitudinal direction, forming a three-phase winding. A method for forming a stator winding for a rotating electric machine according to item 1 or 2. 5. Claim 1, wherein the strip-shaped insulator has a winding conductor for speed detection independent of the stator winding.
A method for forming a stator winding of a rotating electric machine according to item 1, 2, 3, or 4. 6 Claims 1, 2, and 3 in which the strip-shaped insulator has a conductor portion for attaching a magnetic detector.
A method for forming a stator winding of a rotating electric machine according to item 1, 4, or 5. 7. Claim 1, wherein the strip-shaped insulator has a mounting portion for electronic components and a conductor portion for interconnecting the mounting portions.
A method for forming a stator winding of a rotating electric machine according to item 1, 2, 3, 4, 5, or 6.