JP2007014043A - Stator structure of motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator structure of a motor suitable for reduction in motor size, especially reduction in size of a five phase stepping motor, and suitable for automation through elimination of manual work in wire connection. <P>SOLUTION: In the structure where a winding is applied to a stator core having a plurality of salient poles arranged radially on the inner circumferential side through an insulator for insulating the core, m interconnection pins 9a-9e for securing the start-of-winding or the end-of-winding are arranged substantially equally on one end face of the insulator 2, kS guides for guiding a transient wire 8 between the windings are arranged substantially equally on the other end face of the insulator 3, different phase windings are connected by the transient wire 8 via the interconnection pins 9a-9e, and each interconnection pin 9a-9e is connected with motor output terminals corresponding in number to the phases by a connection member, where m is the number of phases, S is the number of salient poles, and k is an integer of 1 or above. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a motor stator structure capable of automating a wire connection work and reducing work processes.

Conventionally, as a stator structure used in a stepping motor, for example, there are those shown in FIGS.
FIG. 5 is a perspective view of the stator portion after the winding process of a stepping motor having 5 phases and 10 salient poles, and FIGS. 6A, 6B, and 6C are easy to see the windings and connecting wires. Therefore, FIG. 7 is an explanatory view of the stator showing only one-phase winding, and FIG. 7 is an image diagram when the stator is cut in the motor axis direction at A part of FIG. 6A and developed in the directions of arrows A1 and A2. FIG. 8 is a completed stator diagram after connection.

As shown in FIG. 5, insulators 102 and 103 as insulators are fitted in the slots of the stator core 101 to insulate the salient pole portions, and the salient poles 106 a and 106 b are interposed via the insulators 102 and 103. Windings 105a and 105b are respectively wound around (see FIG. 6). The winding 105 a and the winding 105 b belong to the same phase, and the connecting wire 108 between the winding 105 a and the winding 105 b is from the right side of the connecting wire guide pin 107 a provided in the insulator 103. It passes through the outer periphery of each crossover guide pin clockwise and reaches the winding 105b from the left side of the crossover guide pin 107b (see FIG. 6C).
Reference numerals 104a and 104b denote end lines at the beginning and end of winding that occur after the end of the winding process.

Actually, after that, the terminal line connecting each end wire 104 and the connecting member provided with the motor output terminal unit are connected to the terminal unit by connecting the end line of each phase to the terminal unit in accordance with the connection method of each phase winding. The stator is completed through the connecting step and the step of fixing the connecting member to the coil end portion or the insulator portion of the stator.
As a connection member, in addition to a set of terminal wires connecting the end wires and a simple lead wire provided with a motor output terminal portion, a terminal portion connecting the end wires on the printed circuit board and a motor output terminal portion are provided. It may be a printed circuit board. In the connection step, the connection between the phase windings is also performed through the connection member.
JP-A-8-79999 JP-A-8-70559

  However, in such a conventional stator structure, since the winding machine usually has the same number of nozzles as the number of phases and winds each phase winding at the same time, as shown in FIG. It is difficult to automate the handling of the end wires, such as connecting twice the number of the end wires to a predetermined terminal portion of a connection member (not shown) according to the connection method between the phase windings. It was.

  In addition, the connecting member is usually disposed at the coil end portion. However, the smaller the motor is, the smaller the coil end portion becomes, and therefore the arrangement of the connecting member becomes difficult. There was also the problem of becoming difficult. In particular, the above problem is remarkable in a 5-phase stepping motor having an outer shape of the stator core of 25 mm square or less.

  FIG. 9 is a perspective view of a stator portion in which ten relay pins (for example, metal pins) 109 for winding and fixing the end wires 104 are implanted in the insulator 102, and the end wires are wound around the relay pins 109, respectively. FIG. 10 and FIG. 10 are completed views of the stator connected by the printed circuit board 110. By doing as shown in FIG. 9, it is possible to eliminate the manual work of the end lines and to automate the end line processing. Actually, a soldering process or the like is performed by using a connecting member formed of a ring-shaped printed circuit board 110 having a motor output terminal and a printed circuit board terminal fitted to the relay pin 109 at a position corresponding to the relay pin 109. To complete the stator.

However, such a method can eliminate the manual work of the end lines, but the wiring pattern on the printed circuit board increases the number of phases because the wiring between the phase windings and the connection to the motor output end are performed. Is complicated, and space for it is also required. When the motor is small, the wiring pattern is arranged in a limited space, so that a multilayer board must be adopted as the printed board, which causes a cost problem. In addition, a five-phase stepping motor having an outer shape of a stator core of 25 mm square or less has a fundamental problem that a space for standing 10 relay pins 9 cannot be secured.

  The present invention solves such conventional problems, and is suitable for miniaturization of motors, particularly for miniaturization of 5-phase stepping motors, and provides a stator structure of a motor suitable for automation by eliminating manual work of connection processing. The purpose is to do.

In order to solve the above-mentioned problems, the present invention provides a stator for a motor in which a winding is wound around a stator core having a plurality of salient poles radially arranged on the inner peripheral side via an insulator that insulates the core. In the structure, when the number of phases is m, the number of salient poles is S, and k is an integer of 1 or more, there are approximately m relay pins for winding and fixing the start or end of the winding to one end face of the insulator. The kS crossover guides for guiding the crossover wires between the windings are arranged almost evenly on the other end face of the insulator, and different phase windings are connected to the relay pins. The connecting wires are connected via the connecting wires, the stator windings are connected in a ring shape, and the relay pins are connected to several motor output terminals by connecting members.
In the present invention, the connecting wire is a connecting wire between two windings continuously wound around two salient poles sandwiching one or more salient poles, and the connecting wire is the one or more connecting wires. Is wound around at least 0.5 times or more of the salient poles.
Furthermore, the present invention is that the number of phases is set to m = 5, and the number of salient poles is set to S = 5 or 10.

  According to the present invention, the effects listed below can be obtained. The crossover process of the copper wire (magnet wire) in the winding machine and the connection process of winding the copper wire around the metal pin can be performed, so that the work efficiency can be improved. In addition, since the connection process can be performed on the winding machine, the cost can be reduced by reducing the number of processes. In addition, since it is possible to carry out connection processing by making a small 5-phase stepping motor (mounting angle 25 mm or less) into 5 slots and annular connection on the winding machine, the work efficiency is improved and the size is reduced by half the number of processed wires. Can be planned.

Hereinafter, embodiments of the present invention applied to a stator portion of a 5-phase 5-pole stepping motor will be described in detail with reference to the drawings.
1 is a perspective view showing a stator portion of a five-phase five-pole stepping motor, FIG. 2 shows a stator with three-phase winding, (a) is a front view, and (b) is a side view of (a). (C) is a rear view of (a). FIG. 3 is an image diagram of the portion B of FIG. 2A when the stator is cut in the motor shaft direction and developed in the directions of arrows B1 and B2. FIG. 4A to FIG. 4D are conceptual diagrams showing which position the copper wire passes depending on the position of the crossover guide pin disposed on the insulator by the line processing.

1 to 3, reference numeral 1 denotes a stator core constituting a five-phase five-pole stator. On the inner peripheral side of the stator core 1, at a predetermined interval in the circumferential direction, radially toward the center, Five salient poles 6a-6e are projected. Reference numerals 2 and 3 denote insulators assembled in the slots of the stator core 1. These insulators 2 and 3 are assembled to the salient poles 6a to 6e from both sides to insulate the periphery of the salient poles 6a to 6e. Around these salient poles 6a to 6e, a winding 11 is wound through insulators 2 and 3 while being insulated from the salient poles 6a to 6e.
Reference numerals 3a to 3j are resin crossover guide pins provided on the insulator 3, and are illustrated in the example along the axial direction at a substantially constant interval in the circumferential direction one by one at positions corresponding to the salient poles 6a to 6e. Then, a total of 10 are protrudingly provided. Reference numerals 9a to 9e denote relay pins (for example, metal pins) around which the copper wire W constituting the winding 11 is wound, and protrudes from the end surface of the insulator 2 along the axial direction at substantially constant intervals in the circumferential direction.

The winding 11 is performed by a direct winding machine having one nozzle as follows.
First, after winding the copper wire W around the relay pin 9a on the salient pole 6a, the winding 11a is performed. Next, the copper wire W is hooked on the outer periphery of the connecting wire guide pins 3a and 3b disposed on the insulator 3, and the copper wire W is passed through the salient pole portion on the insulator 2 side of the salient pole 6b. A copper wire W is hooked on the outside of the pins 3c and 3d, and the copper wire W is wound around the relay pin 9c of the salient pole 6c. Next, it is wound around the salient pole 6c, and the same wire processing is performed. By repeating this, the winding 11 is wound around all the 5 poles, and the copper wire W is wound around the relay pin 9a, so that each phase winding is annular. Connection is complete.

  In addition to the method of winding 11a → 11c → 11e → 11b → 11d in the order of the one-pole skipping described above, the winding 11 may also be a method of winding in the order of 11a → 11d → 11b → 11e → 11c in the case of two-pole skipping. Is possible.

  4A to 4D show the positions of the copper wires W depending on the positions of the crossover guide pins 3a to 3j arranged on the insulator 3 by the line processing described in FIG. 3 in the view seen from the insulator 2 side of FIG. It is the conceptual diagram which showed whether it passes. Reference numerals 12, 13, and 14 denote crossover guide pins provided in the insulator 3.

  As shown in FIG. 4A, when only one guide pin 12 is disposed between the salient poles 6a and 6b and the line processing shown in FIG. 3 is performed, copper wires W are formed on the salient poles 6a to 6e on the insulator 2 side. When passing through, the copper wire W passes through the position close to the center of the stator core 1, and when wound around the salient poles 6a to 6e, the copper wire W is scratched or disconnected. May be frustrated.

Next, as shown in FIG. 4B, the same applies even if the guide pin 13 is provided on the salient pole 6b.
Therefore, as shown in FIG. 4C, two crossover guide pins 3a, 3b and 3c, 3d are provided between the salient poles 6a, 6b and 6b, 6c at a certain interval, so that the salient poles 6a to 6 on the insulator 2 side are provided. When passing the copper wire W through 6e, the copper wire W approaches the outside as viewed from the center of the stator core 1, so that the copper wire W is scratched or disconnected when the salient poles 6a to 6e are wound. Disappears.

  Also, as shown in FIG. 4D, if the guide pin 14 has one or two salient poles 6a, 6b and 6b, 6c, the same effect as in FIG. can get.

  In this way, the number of salient poles is reduced from the usual 10 to 5, and the number of nozzles is set to 1 so that winding is performed as described above. Since the connecting wire 8 between the wires is used, and one end of the connecting wire 8 is wound around the relay pins 9a to 9e that are appropriately arranged, there is no manual work and a connection pattern of the phase winding is provided on the connecting member. There is no need to provide it. Moreover, since it is only necessary to provide a connection pattern from the relay pins 9a to 9e to the motor output terminal, a configuration suitable for automating the stator process of a small-sized (mounting angle 25 mm or less) stepping motor is facilitated. This method is an effective means for reducing manual work not only in the above-described embodiment but irrespective of the size and the motor type.

As described above, according to the stator structure according to the above embodiment, the following effects can be obtained.
By the crossover process of the copper wire (magnet wire) W in the winding machine and the connection process of winding the copper wire around the metal pins as the relay pins 9a to 9e, it is possible to eliminate the manual work and improve the work efficiency. In addition, since the connection processing can be performed on the winding machine, the cost can be reduced by reducing the number of processes. Further, it is possible to reduce the size by halving the number of processed wires by eliminating the manual work of the connection processing by the 5-slot stepping motor (mounting angle 25 mm or less) and the annular connection on the winding machine.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, metal pins are used as the relay pins 9a to 9e for the stator of a five-phase five-pole stepping motor. Needless to say, other materials may be used, or the material may be integrally formed with the insulator in advance, and other modifications may be made as appropriate without departing from the scope of the present invention.

It is a perspective view which shows the stator structure of the motor by embodiment of this invention. The stator which performed the three-phase part winding is shown, (a) is a front view, (b) is a side view of (a), (c) is a rear view of (a). FIG. 3B is a conceptual diagram when the stator is cut in the motor shaft direction and expanded in the directions of arrows B1 and B2 at a portion B in FIG. It is the conceptual diagram which showed which position a copper wire passes by the position of the crossover guide pin arrange | positioned by the wire process at the insulator. It is the conceptual diagram which showed which position a copper wire passes by the position of the crossover guide pin arrange | positioned by the wire process at the insulator. It is the conceptual diagram which showed which position a copper wire passes by the position of the crossover guide pin arrange | positioned by the wire process at the insulator. It is the conceptual diagram which showed which position a copper wire passes by the position of the crossover guide pin arrange | positioned by the wire process at the insulator. It is a perspective view of the stator part after completion | finish of the winding process of a stepping motor with the number of phases of 5 and the number of salient poles of 10 poles. 1 shows a stator with only one phase winding to make it easy to see the windings and connecting wires, (a) is a front view, (b) is a side view of (a), and (c) is a rear view of (a). It is. It is a conceptual diagram when a stator is cut | disconnected in the motor shaft direction in A part of Fig.6 (a), and it expand | deployed to the arrow A1 and A2 direction. It is the stator completed drawing which performed the connection. It is the perspective view of the stator part which planted the relay pin for winding and fixing an end line to an insulator, and wound the end line around the relay pin, respectively. It is a completion perspective view of the stator connected by the printed circuit board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator core 2, 3 Insulator 3a-3j Crossover guide pin 6a-6e Salient pole 8 Crossover 9a-9e Relay pin 12, 13, 14 Crossover guide pin

Claims (3)

  In a stator structure of a motor in which a winding is wound around a stator iron core having a plurality of salient poles radially arranged on the inner peripheral side via an insulator that insulates the iron core, the number of phases is m, and the salient poles When the number is S and k is an integer equal to or greater than 1, m relay pins for winding and fixing the start end or the end of the winding are arranged substantially evenly on one end face of the insulator, and the insulator On the other end face, kS crossover guides for guiding the crossover wires between the windings are arranged almost evenly, and different phase windings are connected by the crossover wires via the relay pins, A stator structure for a motor, wherein windings of the stator are connected in an annular shape, and each relay pin is connected to several motor output terminals by a connecting member.   The connecting wire is a connecting wire between two windings wound continuously around two salient poles sandwiching one or more salient poles, and the connecting wire is at least 0 to the one or more salient poles. 2. The stator structure for a motor according to claim 1, wherein the stator structure is wound five or more times.   The motor stator structure according to claim 1, wherein the number of phases is set to m = 5, and the number of salient poles is set to S = 5 or 10.

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