JPH019268Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field of the invention This invention is a linear induction motor (hereinafter referred to as
This relates to the stator structure of the LIM (referred to as LIM).

Prior Art and Problems Figure 1 is a diagram for explaining a conventional conveying device using a linear induction motor.
2 shows the carrier, 2 its secondary conductor, 3 a rail for guiding the carrier, 4 a drive section, and 5 its stator. In this conventional example, the drive units 4 are arranged at certain intervals along the rail 3, and the carrier 1 running on the rail 3 is connected to the drive unit 4.
The vehicle is propelled by a motor, and along the way it runs by inertia. In such a conveyance device, there are cases where it is desired to increase or decrease the propulsive force. In that case, one possible method is to make the secondary conductor longer or shorter. Increase or decrease the stator lamination thickness. Increase or decrease the length of the stator. In other words, the number of stator magnetic poles is increased or decreased. etc.

Especially for LIMs with movable secondary conductors, etc., it is difficult to meet the above requirements due to carrier size limitations, etc., and the current
In the LIM yoke, the primary core is formed by laminating cores with a specified number of teeth and slots, so the entire stator (stator core and winding coils) must be replaced, which is wasteful. Also in the above section, although the previous winding coil can be used as described in the section above, the previous core is wasted when it comes to the stator core.

Purpose of the Invention In view of the above-mentioned conventional problems, an object of the present invention is to provide a stator structure that is efficient and easily changeable when increasing or decreasing the propulsive force.

Structure of the invention According to the invention, in a stator structure of a linear induction motor in which the stator is arranged at intervals along the traveling direction of the secondary conductor, the stator is arranged in a manner that the secondary conductor is not required. A number of laminated core yoke modules having teeth and slots corresponding to one tooth to one magnetic pole length are arranged and adjacent to each other to form a number of magnetic poles commensurate with the propulsion force. This is achieved by providing a stator structure for a linear induction motor characterized by having a flat rectangular winding coil inserted into a slot formed by the yoke module.

Examples of ideas Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a diagram for explaining the yoke module according to the present invention. This yoke module consists of a laminated core 11 having one tooth 10, an upper fixing plate 12, and a lower fixing plate 13, and is fixed by a set screw 14.
It is beginning to unite people. Although this embodiment is an example in which one tooth is provided, the tooth and the slot may be formed in a continuous manner up to the length of one magnetic pole.

Figure 3 shows a model using the yoke module according to the present invention.
FIG. 3 is an exploded perspective view for explaining the stator structure of the LIM.

In this embodiment, the yoke modules 20 are arranged adjacent to each other by the number of poles corresponding to the required propulsion force, and the base 21 is equipped with screws 2.
2, and adjacent yoke modules 2
A flat rectangular coil 24 is inserted into a slot 23 formed by 0.

In this embodiment configured in this way, the propulsive force can be freely selected by increasing or decreasing the number of yoke modules, and there is no waste of yoke modules when the number of yoke modules is increased or decreased. Furthermore, the use of flat coils facilitates assembly.

FIG. 4 is a diagram for explaining another embodiment, in which a is a configuration diagram and b is an air gap magnetic flux density distribution diagram. This embodiment differs from the previous embodiment in that the laminated portions of the yoke modules 20 at both ends of the stator are made thinner than the central portion. In this embodiment configured in this way, the iron cores at both ends of the stator are magnetically saturated,
As shown by curve A in Figure b, the change in magnetic flux at both ends of the stator can be made smooth, and the end effect can be reduced. Note that the end effect means that when the stator is composed of only yoke modules 20 of the same laminated thickness as shown in Fig. 5a, the air gap magnetic flux density distribution is as shown by curve B in Fig. 5b, and the magnetic flux at both ends of the stator is The change becomes steep, and this is a phenomenon that prevents the LIM's thrust (velocity) from increasing.

Effects of the invention As explained above in detail, the stator structure of the LIM of this invention has the yoke modularized and combined with flat coils, thereby eliminating wasted yoke and creating a stator that can easily change the propulsion force. This is a great benefit that can be provided.

[Brief explanation of drawings]

Figure 1 is a diagram for explaining a conventional transport device using LIM, Figure 2 is a diagram for explaining a yoke module according to the present invention, and Figure 3 is a diagram for explaining a yoke module according to the present invention.
Diagram 4 to explain the stator structure of LIM
FIG. 5 and FIG. 5 are diagrams for explaining other embodiments. In the drawings, 11... Laminated core, 12... Upper fixing plate, 13... Lower fixing plate, 20... Yoke module, 21... Base, 23... Slot,
24... each shows a flat rectangular coil.

Claims (1)

[Claims for Utility Model Registration] In the stator structure of a linear induction motor in which stators are arranged at intervals along the direction of movement of the secondary conductor, the stator has a structure corresponding to the propulsive force required by the secondary conductor. The yoke module is provided with a laminated core yoke module having a number of teeth and slots corresponding to one tooth to one magnetic pole length as required to form the same number of magnetic poles, and the adjacent yoke modules A stator structure for a linear induction motor characterized by having a flat rectangular winding coil inserted into a formed slot.