JPS61273165A - Inductor for conveying molten material - Google Patents

Abstract

PURPOSE:To enable to connect wirings in parallel, series, star-type and delta- type by forming unit inductors of the shortest length having a conveying capacity as one block, mechanically connecting the blocks to form a long inductor, thereby reducing the longitudinal end effect and simplifying the maintenance. CONSTITUTION:A unit inductor of the shortest length L having a conveying capacity is formed. The inductor has salient-poles 4, and coils 7 wound on the poles 4. A long inductor which is magnetically continued by mechanically connecting the unit inductors by connectors 6 is manufactured.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a device for transporting molten metal (hereinafter referred to as molten metal) using a moving magnetic field generated by an inductor, and the present invention relates to a structure of a long inductor when the transport distance is long. It is related to.

(Prior Art) As an inductor for transporting molten metal, an inductor based on the principle of a linear motor is generally used, and when the transport distance is long, an integrated inductor is often manufactured. That is, 1. For example, when the conveyance distance is long in an electromagnetic gutter, a plurality of poles for each phase necessary for conveyance are manufactured in succession. FIG. 2 will be explained. In the same figure, 1 is a refractory material, 2 is an inductor, and 3 is a refractory material.
shows a case where the molten metal 3 is transported in the direction of the arrow by the inductor 2. In this case, inductor 2 has the required length! It is created in one piece with the

By the way, there are three main ways to wind an inductor coil:

(1) Wave wrap method As shown in FIG. 3(a), the coils are successively fitted into the slots of the inductor. in this case.

The distance between poles is pt.

(2) Salient pole type As shown in Figure 3(b), when a coil is wound around each salient pole and three-phase AC is used, R and S are used, respectively.

T Flow each phase. In this case, the distance between poles is P2.

(3) Body winding shape As shown in Figure 3 (c), when a coil is wound around the inductor body and three-phase AC is used, R9S and T each phase 1
flow to. In this case, the distance between poles is P3.

In either case, the required minimum length, that is, the minimum value of the configuration necessary to obtain thrust, is such that one coil exists in each phase.

As shown in FIG. 2, when manufacturing an integrated inductor with a long transportation distance, a plurality of inductors are manufactured in succession, each having one pole for each phase required for transportation. This is cumbersome as it always requires an inductor commensurate with the required length.
Even in the event of a breakdown, it is necessary to take out and repair parts other than Required 1.

(Problem to be Solved by the Invention) The wave wrap method is generally used to wind an inductor coil, but in this case, the coils of one phase intersect with the coils of other phases, so It is not possible to make only the poles independent. Moreover, when each phase has one pole as one set, it is difficult to form a composite magnetic field at both ends of one.

The disadvantage is that vertical edge effects tend to occur. Therefore.

In the case of a long length, the distance P between poles is increased to provide an integral structure.

In the salient pole type, each phase and each coil are separated, so
Although the above-mentioned drawbacks of the wave wrap method do not occur, there are secondary drawbacks.

(1) The coil is always continuous, so the wiring cannot be changed.

(2) The structure becomes large.

(3) Even if only a portion is to be repaired, all the parts must be removed.

The present invention aims to eliminate the above-mentioned drawbacks.

9 In the construction of a long inductor, an independent unit inductor is created without having an integrated structure both mechanically and electrically.

The purpose is to mechanically combine these to make it possible to manufacture a magnetically continuous long inductor.

(Means for Solving the Problems) As shown in FIG. 1 corresponding to the embodiment, when three-phase AC is used as a power source, the shortest length with one salient pole 4 in each phase that has a conveying capacity. A unit inductor consisting of a salient pole coil is prepared, and the unit inductors are mechanically joined together to form a block with a required length. Note that the salient pole portions may be configured to mechanically separate the salient pole portions of each phase.

(Function) FIG. 1 corresponding to the embodiment shows a unit inductor having only one pole in each phase. Even in this case, thrust can be obtained. The distance between poles in this case is treated as the distance between poles when two unit inductors are combined, and is the same as the length shown by P4 in the figure. Also,
The connecting portion (indicated by 6 in the same figure) of each block core (indicated by 5 in the same figure) is not mechanically integrated, but generally when used as shown in Figure 2 above, path 1a is open. The magnetic flux emitted from the poles passes through the air, reaches the molten metal, passes through a pair of opposite poles, passes through the yoke portion, that is, the core, and returns again. Therefore, the length of the magnetic path passing through the core is equal to or close to the length of the magnetic path passing through the space or molten metal. In any case, the length of the magnetic path passing through the air is long. Even if there is some gap between the cores in this state, the damping ratio is extremely small and can be ignored.

(Example) FIG. 1 shows an example of the present invention. This embodiment is an independent unit inductor having only one pole for each phase, and is a so-called salient pole coil. In the figure, 4 is a salient pole, 5 is a core, 6 is a connection part, 7 is a coil + P4 is the distance between poles (ball pitch) when two unit inductors are combined, and this is the pole of this unit inductor. The distance between L is the length of the unit inductor,
This is the shortest length of an inductor with transport capability.

(Effects of the Invention) The present invention provides a unit inductor ti of the shortest length with conveyance capacity.
Since the long inductor is constructed by forming blocks and mechanically connecting the blocks, the following effects can be obtained.

(1) Since a salient pole coil is used, the vertical end effect can be reduced.

(2) Maintenance becomes easier.

(Since each of the three electrical blocks can be made into one unit, in the case of a combination of multiple blocks, it is possible to operate at a fairly arbitrary voltage and current. In other words, in parallel.

Series, star, and delta connections are possible.

(4) No matter how long the combined length is, it is sufficient to make many identical blocks. Therefore, manufacturing man-hours are significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a cross-sectional side view showing an example of a conventional molten metal conveying inductor, and FIG.
)(b)(c) are explanatory diagrams showing how to wind the coil, and (a)
) is the wave wrap method. (b) is a salient pole type, and (C) is a body wrap type. 4: Salient pole. L: length of unit inductor. Patent issued by Shinko Electric Co., Ltd. Figure 1 21Q

Claims (1)

[Claims] 1. When using three-phase AC as a power source, one salient pole for each phase (4)
By creating a unit inductor with the shortest length (L) and having a conveyance capacity of An inductor for transporting molten metal, characterized in that the inductor is configured with a coil.