JPH11122896A - Wire winding method for stepping motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the space factor of windings wound around each stator magnetic pole, and prevent short circuits between two windings wound around the same magnetic pole. SOLUTION: Wires in an A phase and a reverse A phase and in a B phase and a reverse B phase are wound around each magnetic pole on the stator 10 of a stepping motor M. At this time first magnetic poles P1, P3, P5, P7, around which wires W1, W3, W5, W7 in the A phase and in the negative A phase are wound, and second magnetic poles P2, P4, P6, P8 around which wires W2, W4, W6, W8 in the B phase and in the reverse B phase are wound are placed alternately in the stator 10. In each set of two oppositely faced magnetic poles, first and second magnetic poles, the wires in the A phase and in the B phase are wound inside one of the magnetic poles and the wires in negative the A phase and in the reverse B phase are wound outside the one magnetic pole. The wires in the negative A phase and in the reverse B phase are wound inside the other of the magnetic poles, and the wires in the A phase and in the B phase are wound outside the other magnetic pole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a winding method for a stepping motor, and more particularly, to a two-phase, four-phase and eight-phase motor.
The present invention relates to an improvement in a winding method of a stepping motor such as a phase.

[0002]

2. Description of the Related Art Conventionally, for example, a winding method of A-phase and reverse A-phase and B-phase and reverse B-phase wound around each of the stator magnetic poles of a two-phase stepping motor is a bifilar winding.
From one nozzle of the winding machine, two electric wires are simultaneously wound around one magnetic pole, and then the lead wires are individually taken out.

FIG. 5 shows a winding machine for winding each of the stator magnetic poles of a stepping motor having two phases and eight poles (the total number of poles is eight). The winding machine 1 is provided on the outer peripheral surface of a cylindrical electric wire housing 2 for housing electric wires, from each of two nozzles 2 and 3 arranged at positions 135 ° apart from each other. Using electric wires, two electric wires each for A-phase and reverse A-phase, and two electric wires for B-phase and reverse B-phase were simultaneously wound around two magnetic poles. When the winding of the magnetic poles is completed, the winding machine 1 is rotated by 90 °, the magnetic poles at the positions are wound in the same manner, and this is repeated four times in total, thereby completing the winding of the motor. .

In the two-phase stepping motor, the windings of the A-phase, the reverse A-phase, the B-phase and the reverse B-phase are wound by bifilar winding. As shown in FIG.

[0005]

However, in the above-described conventional winding method, two electric wires are simultaneously wound on one magnetic pole from one nozzle 2 or 3 of the winding machine. When the wire is twisted, the wire is twisted, so that even if the nozzle 2 or 3 is swung, the aligned winding cannot be performed. Then, when the two electric wires to be twisted are twisted, there is a problem that the space factor of the windings decreases with an increase in the space between the wires.

At the same time, the two electric wires have a large contact area between them, for example, between the A-phase and the reverse A-phase. There was a problem that it occurred.

[0007] The present invention has been made in view of such a point,
The object of the present invention is to eliminate the above-mentioned problems, to improve the space factor of the windings wound around each of the stator magnetic poles, and to prevent a short circuit between the two windings wound around the same magnetic pole. It is to propose a winding method of a motor.

Another object of the present invention is to propose a winding method for a stepping motor in which the winding start and end of the winding wound around each of the stator magnetic poles can be easily visually observed and workability is improved. Is to do.

[0009]

In order to achieve the above-mentioned object, the present invention provides a stepping motor having a stator magnetic pole having windings of A-phase and reverse A-phase and B-phase and reverse B-phase, respectively. In winding, it is as follows.

(1) The first magnetic pole around which the winding of the A-phase and the reverse A-phase is wound and the second magnetic pole around which the winding of the B-phase and the reverse B-phase are wound are fixed. For each of the two first and second magnetic poles, which are alternately arranged in the stator, and are arranged to face each other around the center axis of the stator, one of the magnetic poles is The A-phase winding and the B-phase winding are wound inside each of the magnetic poles, the reverse A-phase winding and the reverse B-phase winding are wound outside each of the magnetic poles, and the other magnetic pole is ,
The reverse A-phase winding and the reverse B-phase winding are wound inside each of the magnetic poles, and the A-phase winding and the B-phase winding are wound outside each of the magnetic poles. A phase, reverse A phase,
The B-phase and reverse B-phase windings are individually wound around a unifier winding.

(2) In (1), the phase A and the reverse A
Between the windings of the phases and between the windings of the B-phase and the reverse B-phase, the insulation is further improved through an insulating material.

Since the method of the present invention is configured as described above, the two windings wound around the same magnetic pole, that is, the windings of the A-phase and the reverse A-phase and the B-phase and the reverse B-phase are formed. , The windings of the two windings, the windings of the A-phase and the reverse A-phase, and the B-phase and the reverse B-phase are prevented from being short-circuited between the two windings. Since the turning position is different depending on the magnetic pole to be wound, the resistance value of each winding, that is, the resistance value of the windings of A phase, reverse A phase, B phase and reverse B phase,
The inductance value and the like are made the same to improve the assembly workability while maintaining the characteristics of the conventional two-phase stepping motor.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view of a stator of a stepping motor according to an embodiment of the present invention, which is wound by a winding machine, and FIG. 2 is used for the winding of FIG. Diagram showing a winding machine,
3 (a), 3 (b), 3 (c) and 3 (d)
FIG. 2 is an enlarged sectional view of each of windings A, B, C and D in FIG. 1.

In FIG. 1, for example, a stator 10 of a stepping motor M having two phases and eight poles (the total number of poles is eight) includes a case 11
The windings W1 to W8 are wound around each of eight magnetic poles P1 to P8 radially arranged at equal pitches along the inner peripheral surface, and the windings W1 to W8 are wound around the magnetic poles P1 to P8. A plurality of stator small teeth, not shown, are arranged along the inner circumferential direction at the tip of the stator. A rotor (not shown) is rotatably supported on the stator 10 by a bearing concentrically with the axis of the stator, and a plurality of moving elements are mounted on the outer peripheral surface along the outer peripheral direction. The teeth are arranged at equal pitch.

The magnetic poles P1 to P8 are formed by first magnetic poles P1, P3, P5, and P7 around which two layers of windings W1, W3, W5, and W7 of A phase and opposite A phase are wound, respectively. Two layers of windings W2, W4, W6 and W8 of B phase and reverse B phase are respectively composed of wound second magnetic poles P2, P4, P6 and P8, and the first magnetic poles P1 and P3 , P5, P7 and the second
Magnetic poles P2, P4, P6, and P8 are alternately arranged in the stator 10.

The stator magnetic pole P of the stepping motor M
Winding machine 5 for winding each of 1 to P8
Is provided on the outer peripheral surface of the cylindrical electric wire storage section 2 for storing electric wires.
Four nozzles 6, 7, 8, 9 disposed at positions 45 °, 135 °, and 45 ° apart from each other on substantially the same plane.
, One wire for each of the reverse B-phase, reverse A-phase, B-phase, and A-phase is simultaneously used around the magnetic poles by using the wires stored in the wire storage unit 2. While moving in the direction, the coils are wound around four magnetic poles P8, P1, P4, and P5.

When the winding of the magnetic poles P8, P1, P4, P5 is completed, the winding machine 5 is turned 90 ° in a counterclockwise direction, and similarly wound inside the magnetic pole at that position, The winding machine 5
Is rotated counterclockwise by 90 °, and the magnetic pole at that position is wound outside the winding wound inside. When the winding is completed, the winding machine 5 is further turned 90 ° in a counterclockwise direction, and wound around the winding wound inside the magnetic pole at that position, and this is wound four times in total. Repeat to complete the winding of the motor.

These magnetic poles P1, P3, P5, P7 have
Windings W1, W3, W wound in two layers of A phase and reverse A phase
5A and 5B are enlarged sectional views of FIGS.
(B), FIG. 3 (c) and FIG. 3 (d).
On the other hand, the same applies to the windings W2, W4, W6, and W8 wound around the magnetic poles P2, P4, P6, and P8 in two layers of the B phase and the reverse B phase. In this case, the windings of the A-phase, the reverse A-phase, the B-phase, and the reverse B-phase are individually wound around the unifier winding. For this reason, each winding of A phase, reverse A phase (or B phase, reverse B phase)
Only the surface E in the drawing is in mechanical contact via the insulating material or the insulating material of the winding itself, so that there is almost no electrical contact between them.

Here, FIGS. 3A, 3B and 3
As shown in FIG. 3 (c) and FIG. 3 (d), the winding of each A-phase and reverse A-phase (or B-phase and reverse B-phase) is wound inward or outward by one magnetic wire by the magnetic pole. So that the length differs between inside and outside. Therefore, the resistance value and the inductance value naturally differ. However, conventionally, it has been considered that the motor does not operate properly if the resistance value or the inductance value differs for each magnetic pole.However, if the windings can be balanced among the related magnetic poles as a whole, the motor becomes It has been experimentally found that it works properly.

In the two-phase stepping motor according to the present embodiment, the windings of the A-phase, the reverse A-phase, the B-phase and the reverse B-phase are individually wound around the unifier winding, so that the winding starts and The lead wire at the end of winding is as shown in FIG.

As described above, according to this embodiment,
The following effects can be obtained. (A) Since the two windings wound around the respective magnetic poles of the stator, that is, the windings of the A-phase and the reverse A-phase and the B-phase and the reverse B-phase are individually wound on the unifier winding, Since the winding start and the winding end can be clearly distinguished, the respective resistance values can be easily measured. Also, without continuity test,
Common lines can be removed, eliminating the need for colored wires. (B) Since the wound electric wires emerge independently of the nozzle of the winding machine, future automation can be expected. (C) By winding the two windings individually, it is possible to form an aligned winding by oscillating the nozzle, so that a high space factor of the windings can be aimed at.

(D) Since the individual windings are unified windings, each of which is wound with one electric wire, the nozzle width can be reduced. As a result, the windings having a large number of turns are wound inside the stator core. You can wind a wire. (E) As an application, the winding of only the A-phase and the B-phase, such as an ultra-low-speed synchronous motor, or the number of windings can be halved, so that the number of winding steps per unit is halved.

Note that the technology of the present invention is not limited to the technology in the above-described embodiment, and may be implemented by means of another mode having the same function. Various changes and additions are possible. In the present embodiment, the winding method of a two-phase stepping motor has been described, but the winding method of a multi-phase stepping motor including four-phase and eight-phase can be similarly performed.

[0024]

As is apparent from the above description, according to the winding method of the stepping motor of the present invention, the phase A and the reverse A
A first magnetic pole on which a phase winding is wound and a second magnetic pole on which a B-phase and an opposite B-phase winding are wound are alternately arranged in the stator and face each other. For each of the two first and second magnetic poles, one of the magnetic poles is formed by the A-phase winding and the B-phase winding having the opposite A-phase winding inside each of the magnetic poles. A winding and a reverse B-phase winding are wound outside each of the magnetic poles, and the other magnetic pole is wound around the reverse A-phase winding and the reverse B-phase winding.
A phase winding is wound inside each of the magnetic poles, the A phase winding and the B phase winding are wound outside each of the magnetic poles, and the respective A phase, reverse A phase, B phase Since the windings of the reverse B phase are individually wound around the unifier winding, the space factor of the winding wound around each of the stator magnetic poles is improved, and the windings are wound around the same magnetic pole. A short circuit between the two windings can be prevented.

Further, the characteristics of the conventional two-phase stepping motor are maintained by equalizing the resistance values, the inductance values, and the like of the respective windings, ie, the windings of the A phase, the reverse A phase, the B phase, and the reverse B phase. At the same time, the start and end of the winding wound around each of the stator magnetic poles can be easily visually observed, and the effect that the assembling workability can be improved can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a stator of a stepping motor according to an embodiment of the present invention, which is shown in FIG.

FIG. 2 is a front view showing a winding machine used for the winding of FIG.

FIGS. 3 (a), 3 (b), 3 (c), and 3 (d) are enlarged cross sections of respective windings of an A portion, a B portion, a C portion, and a D portion in FIG. FIG.

FIG. 4 shows the beginning of winding of each winding wound on the stator of FIG. 1,
It is a figure which shows the lead line of the end of winding.

FIG. 5 is a front view showing a conventional winding machine.

FIG. 6 is a diagram showing leading lines at the start and end of winding of each winding wound around a stator of a conventional two-phase stepping motor.

[Explanation of symbols]

 10 Stator M Two-phase stepping motor P1, P3, P5, P7 First magnetic pole P2, P4, P6, P8 Second magnetic pole W1, W2, ‥‥‥ W8 Winding

Claims (2)

[Claims] When winding windings of an A phase and a reverse A phase, and B phase and a reverse B phase around each of the stator magnetic poles of a stepping motor, the windings of the A phase and the reverse A phase are wound. A first magnetic pole to be turned, and B
And a second magnetic pole around which the winding of the opposite B-phase is wound are alternately arranged in the stator, and are arranged to face each other around the center axis of the stator. For each of the two first and second magnetic poles, one of the magnetic poles has the A-phase winding and the B-phase winding disposed inside each of the magnetic poles, opposite to the reverse A-phase winding. The B-phase winding is wound around each of the magnetic poles, and the other magnetic pole is connected to the reverse A-phase winding and the reverse B-phase winding.
A phase winding is wound inside each of the magnetic poles, the A phase winding and the B phase winding are wound outside each of the magnetic poles, and the respective A phase, reverse A phase, B phase A winding method for a stepping motor, wherein the winding of the reverse B phase is individually wound around a unifier winding. 2. The insulation between the windings of the A-phase and the reverse A-phase and between the windings of the B-phase and the reverse B-phase is further insulated through an insulating material. A method for winding a stepping motor according to claim 1.