JPH0583923A - Single layer-wound linear induction motor - Google Patents

Abstract

PURPOSE:To provide a single layer-wound linear induction motor, design and manufacturing periods of which are shortened while resources of which are saved and cost of which is reduced. CONSTITUTION:The title motor is composed of a stator and a needle movably installed across an air gap while facing the stator, and the stator 30 has a core tooth section 31, a yoke section 41 and a coil 51, on which only the core tooth section 31 is wound, which are separately changed into units respectively. The core tooth sections 31, to which the coils 51 are mounted, are fixed successively to the yoke section 41 at regular intervals in the longitudinal direction of the yoke section 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-layer winding linear induction motor.

[0002]

2. Description of the Related Art A conventional single-layer winding linear induction motor will be described with reference to the drawings. FIG. 3 is a front sectional view showing a part of the stator, FIG. 4 is a sectional plan view of the same, and FIG. 5 is a plan view for explaining a punching procedure of the iron core.

The single-layer winding linear induction motor is composed of a stator 10 and a mover (not shown) movably provided so as to face the stator 10. As shown in FIGS. 3 and 4, the stator 10 is composed of a stator core 11 and a coil 21 wound or fitted on the stator core 11. The stator core 11 has a tooth portion 13,
A groove portion 14 and a yoke portion 15 are formed. The coil 21 has the same size, the same number of turns, and the same winding direction, and only one tooth 13 is wound or fitted into this. The terminals of the coil 21 are electrically connected in a predetermined manner.

FIG. 4 shows a 3-phase, 6-pole star connection. In the vicinity of the tip of the tooth portion 13, a concave groove 16 is provided facing the groove portion 14, that is, in the direction orthogonal to the longitudinal direction of the motor, and the wedge fitted in the concave groove 16.
The coil 17 prevents the coil 21 from rising. Reference numeral 18 denotes an insertion hole for a fixing tool (not shown).

The stator core 11 is manufactured as follows. That is, as shown in FIG. 8, a tooth portion 13 having a predetermined dimension, a groove portion 14 alternately adjacent to the tooth portion 13, and the tooth portion 13
It is manufactured by punching out a yoke portion 14 for integrally connecting the above from one silicon steel plate and stacking these to a predetermined thickness.

By exciting the coil 21, a thrust is generated in the mover by the traveling magnetic field generated. The thrust is configured to convey the conveyed object mounted on the mover to be driven. Generally, when the air gap magnetic flux density of a linear induction motor is constant, the thrust generated in the mover is approximately proportional to the overlapping area of the mover facing the stator, and the input of a small linear induction motor with an iron core is 1 kVA. A starting thrust of 30 to 50 N is obtained. Since the length, input, etc. of the motor change depending on the drive target, the stator core and the coil are designed and manufactured for each drive target.

[0007]

However, as described above, the length of the motor, the input, and the like change depending on the difference in the driven object, so that it cannot be mass-produced, and the design and manufacture are required each time according to the demand. In addition, there is a problem that a lot of man-hours are required and a manufacturing period becomes long. Also, the total length of the motor
Depending on (the total length of the stator), the size of the existing coil mold insulation treatment equipment is constrained and it is not possible to manufacture a long one. Further, when the stator core 11 is punched out from the silicon steel plate 12, the groove portion 14, that is, the storage portion of the coil 21 is scraped, so that there is a problem that the core material and energy are lost. The present invention was devised in view of the above circumstances, and an object thereof is to provide a single-layer winding linear induction motor that shortens the designing and manufacturing period and saves resources and costs.

[0008]

A single-layer winding linear induction motor according to the present invention comprises a stator and a mover provided so as to be opposed to the stator, and the stator punches a silicon steel plate. And a plurality of core teeth formed by laminating to a predetermined thickness and a yoke part, and a plurality of coils for winding only the one core teeth, and It is characterized in that the iron core tooth portions, each having a coil attached to the yoke portion, are sequentially fixed at predetermined intervals in the longitudinal direction of the yoke portion. Further, the iron core tooth portion includes a toothed portion formed at the tip in a direction orthogonal to the longitudinal direction of the motor.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view in which a part of the stator is cut away,
FIG. 2 is a front view of the stator core. The same parts as those in the prior art are designated by the same reference numerals.

A single-layer winding linear induction motor according to the present invention (hereinafter referred to as the motor of the present invention) comprises a stator 30 and a mover (not shown). The stator 30 is formed as a separate body and is formed into a plurality of units. The iron core tooth portion 31, one yoke portion 41, and a plurality of coils 51 are included. The iron core tooth part 31 corresponds to the conventional stator iron core 11 in which only the tooth part 13 is separated.

As shown in FIG. 2, in the iron core tooth portion 31, only the tooth portion is successively punched out from one silicon steel plate 12 at a predetermined interval in succession into a predetermined shape, and these are bonded by an epoxy resin to a predetermined thickness. It is manufactured by stacking it on. The iron core tooth portion 31 is provided with a ridge 32 projecting outward at the tip of each side surface. In addition, a wedge-shaped fitting piece 33 is projectingly provided on the base portion. Reference numeral 34 (hatched portion in FIG. 2) is a portion surrounded by the adjacent iron core tooth portions 31 and is press waste.

The yoke portion 41 has a tooth portion 13 more than the conventional stator iron core 11.
Is equivalent to the removed one. It is formed separately from the iron core tooth portion 31, and is manufactured by punching out one silicon steel plate 12 according to the above and stacking it to a predetermined thickness. The yoke section 41
The dovetail grooves 42 into which the fitting pieces 33 are fitted are formed at predetermined intervals in the longitudinal direction. Coil 51 is a conventional coil
It is similar to 21, and is manufactured by winding one iron core tooth portion 31 or fitting it into the iron core tooth portion 31.

Next, a procedure for assembling the stator 30 will be described. One coil 51 is wound or fitted around one iron tooth portion 31 and mounted, and a mold insulation treatment is performed to form an iron core coil unit 52. Since the coil 51 is prevented from being lifted up by the protrusion 32, the wedge is no longer required as in the conventional case. The fitting portion 33 is fitted into the dovetail groove 42, and the iron core coil unit 52 is fixed to the yoke portion 41.

When the coil 51 is excited, the mover moves forward and backward as in the conventional case. In order to change the specification of the motor of the present invention depending on the difference in the object to be driven, it is only necessary to change the length of the yoke portion 41, and the iron core coil units 52 may be fitted into the yoke portion 41 by the required number and assembled. Due to the above dimensions, a single-layer winding linear induction motor having different motor length, input / output, synchronous speed, etc. can be manufactured in a short period of time.

The method of fixing the iron core tooth portion 31 to the yoke portion 41 is not limited to this embodiment, but may be fixed by fastening with bolts, nuts or the like. Further, the iron core coil unit 52 may have a separate coil 51 that has been subjected to mold insulation treatment mounted on the iron core tooth portion 31.

[0016]

As described above, the motor of the present invention has the following effects because the core tooth portion 31, the yoke portion 41 and the coil 51 forming the stator 30 are unitized as separate units. . Since the motor length, input / output, etc. can be easily changed, the manufacturing period is short and the cost can be reduced. Since the teeth of the iron core can be punched at small intervals, resource and energy can be saved. The iron core teeth and the coil are much smaller than the whole motor, and since they are integrally molded and insulated, they do not require large processing equipment. Since it can be assembled according to the motor length at the installation site, adjustment work at the site becomes easy.

[Brief description of drawings]

FIG. 1 is a perspective view of a stator according to the present invention with a part of a stator cut away.

FIG. 2 is a front view of a stator core according to the present invention.

FIG. 3 is a front view cross-sectional view showing a part of a stator, which is a drawing related to a conventional technique.

FIG. 4 is a plan view cross-sectional view of the related art.

FIG. 5 is a plan view for explaining a punching procedure of an iron core, which is a drawing according to a conventional technique.

[Explanation of symbols]

 12 Silicon steel plate 30 Stator 31 Iron core tooth part 41 Yoke part 51 Coil 52 Iron core coil unit

Claims (2)

[Claims] 1. A plurality of stators, each of which comprises a stator and a mover provided so as to be opposed to the stator so as to be movable, the stator being formed by punching a silicon steel plate, forming each into a separate body, and laminating a predetermined thickness. An iron core tooth portion, a yoke portion, and a plurality of coils for winding only the one iron tooth portion, and the iron tooth portion having a coil attached to the yoke portion is a yoke portion. A single-layer winding linear induction motor, which is sequentially fixed at predetermined intervals in the longitudinal direction. 2. The single-layer winding linear induction motor according to claim 1, wherein the iron core tooth portion has a ridge formed at a tip thereof in a direction orthogonal to a longitudinal direction of the motor.