JPS59201671A - Reaction plate for linear motor - Google Patents

Abstract

PURPOSE:To prevent the warpage or expansion of a conductive plate upon rising of a temperature by providing projecting pieces at both sides of the plate, dividing a core into three core segments, and providing engaging grooves for engaging the projecting pieces of the plates at both sides. CONSTITUTION:Projecting strips 11b bent inward in parallel with the opposed surface of a linear motor are formed at both sides of a conductive plate 11 made of aluminum as a material. On the other hand, a core 12 is divided into three core segments in a widthwise direction over the entire length, and engaging grooves 12a for engaging the strips 11b of the plate 11 are continuously formed in the lengthwise direction on two cores 12' of both sides. The plate 11 and the core 12 are engaged, a pin 14 is inserted to secure to each other, and the propulsion force of a linear motor acted on the plate 11 is received by the pin 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a reaction plate serving as a secondary stator of a linear induction motor (hereinafter simply referred to as a linear motor).

(b) Conventional technology There is a reaction plate on the ground side equipment of the near motor used in new transportation systems, high-speed railways, etc. Conventionally, this plate has a structure in which, as shown in FIG. 1, an aluminum plate 1 and a band-shaped iron core 2 are integrated by explosive bonding, and then welded to a pace iron plate 5 that is fixed to a roadbed 4 via a fastening fitting 3. It was common to do so.

(c) The problem that the invention seeks to solve, but
This type of reaction plate uses a special processing method called explosive bonding, so it has the disadvantage of being expensive to manufacture.

In addition, since the aluminum plate 1 is integrally joined to the iron core 2 by explosive bonding, there is little room for expansion, and as a result, deformation of the aluminum plate may occur due to the difference in coefficient of thermal expansion with the iron core. There is. That is, at a starting point where the speed of the floating vehicle is slow, the same plate is energized for a long time, resulting in a large temperature rise in the reaction plate. This causes the aluminum plate to wave mainly in the longitudinal direction.

(b) Means for Solving the Problems In order to eliminate the above-mentioned drawbacks, the present invention has provided a conductive plate made of aluminum or the like with protrusions or protrusions parallel to the facing surface of the near motor or inward on both sides of the conductive plate made of aluminum or the like. On the other hand, the iron core is divided into at least three parts in the middle direction, and two pieces on both sides 1111+ are provided with matching grooves with the protruding pieces or protrusions 1β of the conductive plate, and the two pieces on both sides are connected to the conductive plate. After fitting, the entire structure is integrated, and both are fixed to each other via a pin that receives the thrust of a linear motor.

(e) Examples An embodiment of the present invention is shown in FIGS. 2 and 3.

As shown in the figure, the reaction plate 10 consists of a conductive plate 11 preferably made of aluminum or copper, a band-shaped iron core 12 overlapping the conductive plate 11, and a base iron plate 13 that fixedly supports this iron core. There are side walls 1 at both ends of the
1a and the opposing surface of the linear motor from its lower end (the upper surface of the reaction plate and the lower surface of the secondary side mover 20)
A protrusion 111) is provided parallel to and bent inward.

On the other hand, the iron core 12 is divided into three parts in the width direction over its entire length, and the two parts on both sides indicated by the reference numeral 12 are each provided with a fitting groove 12a continuously in the length direction into which the protrusion of the conductive plate is fitted. It is. For this iron core, first, two pieces 12.12 of both sides are fitted on both sides of the conductive plate 11 as shown in Fig. 3, and then,
The remaining iron core 12 is inserted between the two iron cores, and then the abutting portions 12+) (Fig. 3) of each iron core are welded to integrate the king.

In addition, the conductive plate 11 and the Yoshitetsu core 12 fitted together in this way
is a pin 1 perpendicular to the direction of the magnetic flux A of the movable element 20 on at least one location in the longitudinal direction, and on both sides of the central part.
4 are inserted and fixed to each other, and Z+ acting on the conductive machine 11
``') The thrust of the near motor is stopped by the pin 14.

Furthermore, an insulating layer 15 is formed in advance at the interface where the conductive plate 11 and the iron core 12 contact each other to prevent electrolytic corrosion of the conductive plate.
Finally, the integrated iron core 12 is welded to the base iron plate 13 (numeral 16 in FIG. 3 is the welded part) to complete the reaction plate 10 of the embodiment.

Here, the iron core 12 may be divided into three or more pieces, and the iron cores of both 11111 having fitting grooves and the iron core inserted between them are tapered fitted as shown in the embodiment. is desirable.

If the conductive plate is an aluminum product, the insulating layer 15 may be formed by forming an alumite film on its surface and using it as an insulating layer, or by pasting plastic tape on either the conductive plate or the iron core. It may be coated with an insulating paint or coated with an insulating paint.

Furthermore, even if the protrusions of the conductive plate 11 are protrusions formed intermittently in the length direction, the effect will change.
If a notch 11c as shown in FIG. 4 is provided at the boundary between the wall 11a and the protrusion or protrusion, the pressure force of the protrusion or protrusion against the iron core due to expansion and contraction of the side wall will be weakened, thereby improving conductivity. Expansion and contraction of the plate in the middle direction is performed more smoothly.

In addition, as shown in FIG. 5, the same effect can be obtained even if the IJ wall 13 of the conductive plate 11 is omitted.

The reaction plate constructed as described above is fixed to the roadbed using fastening fittings in the conventional manner.

(f) Effects The reaction play 1 of the present invention described above is caused by the expansion and contraction direction of the conductive plate only being restricted in the vertical direction, but expansion and contraction in the middle and length directions being allowed. The conductive plate does not warp or bulge due to temperature rise, and therefore the running state of the floating vehicle is stabilized.

Further, the conductive plate can be easily obtained by extrusion molding, the iron core can be easily processed, and both can be easily assembled, so that manufacturing costs can be reduced.

Furthermore, since the magnetic flux of the IJ near motor is oriented in the longitudinal direction, there is no change in the performance of the linear motor due to dividing the iron core in the width direction.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional reaction plate;
FIG. 2 is an exploded perspective view showing an example of the reaction plate of the present invention, FIG. 3 is a perspective view of the assembled state, and FIGS. 4 and 5 are front views showing modified examples of the conductive plate. . 10... Reaction plate, 11... Conductive plate, 1
1b... Projection, 12... Iron core, 12a... Fitting groove, 1
3.Base iron frame, 14 pins, 15...insulating layer.

Claims (1)

[Scope of Claims] (Moon) If a conductive plate is placed on the upper surface of a band-shaped iron core fixed on a base iron plate, or in a secondary reaction plate of a near motor, both sides of the conductive plate are placed parallel to the opposing surface of the linear motor. Provide a protruding piece or protrusion that faces inward, while
The iron core is divided into at least three parts in the middle direction, two on both sides are provided with fitting grooves for the protrusions or protrusions of the conductive plate, and one on both sides is
After engaging the two pieces in a conductive manner, the whole is integrated.Furthermore, the conductive plate and the iron core are fixed to each other via a pin that receives thrust, and an insulating layer is provided at the interface between the two. An action plate that uses linear motors. (2) An action plate for a linear motor according to claim (1), wherein the isoelectric plate is made of aluminum or copper. (3) The linear motor according to claim 1 or 2, characterized in that the two iron cores on both sides and another divided iron core are tapered fitted. action plate. (4) The action plate for a linear motor according to any one of claims (1) to (3), wherein the insulating layer is made of an alumite film, a plastic tape, or a paint film.