JPH0649107Y2 - Linear motor module status - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A module stator for a lateral magnetic flux type linear motor, which is a mold that also serves as an inter-core spacer and a core mounting portion for each stator core or for each number of one magnetic pole length. By forming the unit as a unit with a member and mounting a plurality of the units on a single base, it is possible to cope with a change in the stator length, easiness of assembly, and improvement of characteristics.

[Industrial application field]

The present invention relates to a linear motor, and more particularly, to a structure of a module stator of a lateral magnetic flux type linear motor.

It is well known that linear motors are classified into a longitudinal magnetic flux type and a lateral magnetic flux type depending on the direction of the magnetic field surface with respect to the relative movement direction of the stator (primary iron core) and the secondary conductor. FIG. 5 shows the structure of a vertical magnetic flux type linear motor. Reference numeral 1 is a stator and reference numeral 2 is a secondary conductor. The stator 1 is a state in which a pair of left and right laminated cores 3a, 3b having a large number of teeth arranged along the relative movement direction A between the stator 1 and the secondary conductor 2 are separated by a gap G required for the secondary conductor 2 to pass. The structure is attached to the base 4. Reference numeral 5 indicates a coil wound around the magnetic poles of the cores 3a and 3b, and the magnetic flux is generated in the core plane, that is, in the plane parallel to the relative movement direction of the stator 1 and the secondary conductor 2. In the case of such a stator structure, since the cores 3a and 3b are separate components, the base 4 is required to have a high rigidity in order to have a rigidity capable of resisting the attractive force between the opposing magnetic poles of both cores. Moreover, when changing the specification of the stator length, a ready-made core cannot be used, and it is necessary to newly manufacture the core.

A lateral magnetic flux type linear motor has been conceived in order to deal with such a drawback, but there are still problems as will be described later, and countermeasures against it are an issue.

[Conventional technology]

FIG. 6 shows a stator structure of a conventional lateral magnetic flux type linear motor. Reference numeral 10 indicates a C-shaped laminated core, in which a plurality of cores 10 are arranged with a sleeve-shaped spacer 11 interposed between them, a shaft 12 is inserted, and both ends are screwed (not shown). Assemble together. Reference numeral 13 is the core 10
Shows a coil mounted on the core (only one is shown), and the magnetic flux is generated in the plane of the core, that is, in the plane perpendicular to the relative movement direction A between the stator and the secondary conductor (not shown).

According to such a structure, the core itself can be provided with rigidity that can resist the attractive force between the opposing magnetic poles of both cores.
It does not require a base having high rigidity as in the case of FIG. 5, and the weight can be reduced. Moreover, when changing the specifications of the stator length, the core
The 10 and the spacer 11 have the advantage that they can be used as they are just by increasing or decreasing the number of them.

[Problems to be solved by the invention]

In the case of the above conventional structure, the core 10 and the spacer 11 are connected to the shaft 12
It is very complicated to assemble one by one into
Lack of productivity.

Further, it is usually inefficient to attach the base 11 after assembling to the base after fixing the spacer 11 by using, for example, U bolts or hook bolts. Further, since the shaft 12 penetrates the core 10, it is disadvantageous in terms of magnetic characteristics.

Furthermore, making a curved stator is extremely difficult, if not impossible.

Therefore, the present invention is intended to solve the problems of the prior art.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is based on FIGS.
As shown in the figure, one core 21, 31, or 41 or a number corresponding to one magnetic pole length (3 in the example of FIGS. 3 and 4 is used).
Each of them is formed as a unit 20, 30, or 40 integrated with the mold member 22, 32, or 42 which also serves as an inter-core spacer and a core mounting portion, and these units are formed into a single base 2
A plurality of them are arranged on 3, 33, or 43, and the mold member 22
Fix the laminated core mounting part of the single base 23, 33,
The stator module is configured by attaching to 43.

[Action]

Since the core is integrally formed with the mold member that also serves as the inter-core spacer and the core mounting portion, the stator can be easily assembled by arranging the units on the base and fixing the mold member to the base. It is possible to easily deal with the change in the stator length simply by increasing or decreasing the number of.

〔Example〕

1 and 2 are an exploded perspective view and an assembled end view, respectively, of a first embodiment of a stator of the present invention.
In the figure, reference numeral 21 denotes the same C-shaped laminated core as that of the conventional example shown in FIG. 6, and each core 21 is formed as a unit 20 integrated with a molding member 22. Mold member 22
Is also used as a spacer between cores and a core mounting part,
As shown in FIG. 1, by arranging a plurality of units 20 on a base 23 in a state where the mold members 22 are in close contact with each other, the cores 21 are arranged in a constant space. Then, the unit 20 is fixed to the base 23 by fixing the mold member 22 to the base 23 with the screws 25 using the holes 22a and 23a.
It is attached to 23 (Fig. 2). Then, the coil 24 is attached to the core 20. The stator of the illustrated example is of a three-phase AC drive motor, and one core pole length is formed by three cores, and the coils 24 are attached to each of the three cores and sequentially shifted one by one. The coil 24 is attached by inserting it vertically into the gap G between the magnetic poles of the core 21 in FIG.
As shown in the figure, the mold member 22 is laid horizontally. Therefore, if the outer corner portion of the core 21 is chamfered as indicated by reference numeral 21a, the coil can be easily attached. After mounting, the coil 24 is fixedly held by the resin 26 also as a coating. Further, after the coil is attached, the cover 27 is fixed to the magnetic pole end surface of the core 21. The cover 27 is a strip plate continuous over all cores or a strip plate adjacent to each other by one magnetic pole length, and contributes to improvement of the magnetic field distribution characteristic of the stator.

FIG. 3 shows a second embodiment of the stator according to the present invention. In this example, a three-core AC drive motor, three cores 31 each having one magnetic pole length are formed as a unit 30 integrated with a molding member 32. is there. Also in this case, a plurality of units 30 are arranged on the base 33 in a state where the mold members 32 are in close contact with each other, and the mold member 32 is fixed to the base 33 with screws (not shown) to obtain a stator of a required length. You can The coil 34 is attached in the same manner as in the first embodiment.

Next, FIG. 4 shows a third embodiment of the stator of the present invention. This stator is basically the same as the second embodiment described above, but this is a curved stator, whereas the second embodiment is a linear stator. So unit 40,
The base plate 43 and the coil 44 each have a curved shape with a constant curvature, and by assembling these in the same manner as in the second embodiment, a curved stator can be obtained.

[Effect of device]

As described above, the stator of the present invention is very simple to assemble because the core is formed as a unit that is integral with the spacer between cores and the molding member that also serves as the core mounting portion.

Further, it is possible to easily deal with the change in the stator length by simply increasing or decreasing the number of units.

Moreover, using the same core, the facing magnetic pole cross-sectional area can be easily changed for the purpose of increasing the thrust of the motor.

The traveling speed (synchronous speed) of the motor can be freely changed by changing the interval for each magnetic pole.

Further, since it is not necessary to form through holes for assembling shafts and bolts for attaching to the base in the core, good magnetic characteristics can be obtained.

Furthermore, the stator structure of the present invention inherits all the advantages of the lateral flux type linear motor in that the core itself has rigidity against the attraction between the magnetic poles of the core, and the rigidity of the base itself can be reduced. Therefore, the thickness of the base can be reduced, and the weight and size can be reduced. Therefore, the curved shape of the base is also easy, and in combination with this, the curved shape of the unit is easy, and the manufacture of the curved stator is very easy.

From the above, the present motor requires less types of constituent parts for each specification, and motors of various specifications can be easily realized at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention before assembly, FIG. 2 is an end view of the first embodiment of the present invention after assembly, and FIG. 3 is a second embodiment of the present invention before assembly. FIG. 4 is a perspective view of a third embodiment of the present invention before assembly, FIG. 5 is a view showing a conventional vertical magnetic flux type linear motor, and FIG. 6 is a conventional lateral magnetic flux type linear motor. It is a figure which shows the module stator of. 1 to 4, 20,30,40 are units, 21,31,41 are cores, 22,32,42 are mold members, 23,33,43 are bases, 24,34,44 are coils. Show.

Continuation of the front page (72) Inventor Toshinori Miyazaki 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited (56) References JP-A-55-133665 (JP, A) JP-A-59-96850 (JP) , A) Actual development Sho 55-19467 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A module stator for a lateral magnetic flux type linear motor, wherein a plurality of laminated cores forming a magnetic path in a plane perpendicular to the relative movement direction with respect to the secondary conductor are arranged with a predetermined spacer therebetween. In the above, at least one laminated core is formed as an integral unit by a spacer that defines a space between adjacent laminated cores and a mold portion that also serves as a laminated core mounting portion, and a plurality of the units are arranged on a single base. A module stator for a linear motor, wherein the laminated core attachment portion of the mold portion is attached to the single base with a fixing screw. 2. A core is provided for every one magnetic pole length of the stator.
The module stator of a linear motor according to claim 1, wherein the module stator is formed as one unit.