JPS60101906A - Three-phase three legs iron core type reactor with gaps - Google Patents

Abstract

PURPOSE:To facilitate control of fixing force and reduce vibration and noise by making a central iron core leg higher than left and right iron core legs and fixing with vertical rods. CONSTITUTION:The thickness of a spacer 12 for the gap of a central iron core leg 10 is made larger than that of a spacer 12 for left and right iron core legs 10 and the height of the central iron core leg is made higher. In this case, the inductance L of the winding 3 of the central iron core leg 10 has the relation Lproportional N<2>/G with the thickness G of the spacer 12 and the number of turns N of the winding 3, accordingly number or turns N of the central iron core leg 10 is increased than that of other legs to make N<2>/G constant. Four rods 9a, 9b, connecting metals 8a, 8b and fixing metals 5a, 5b on the both ends are used for vertical direction fixing. In this construction, only the control of fixing force of the rods 9a, 9b is required and the vertical fixing of the central leg 10 is obtained by the rigidity of yokes 2a, 2b whereby a three-phase three legs iron core type reactor with gaps of easy control of fixing force and low vibration, low noise can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement of a Sanwa tripod iron core type reactor with a gear knob.

[Background of the invention]

In general, a three-phase three-legged core reactor with a gear is constructed by connecting leg cores 10 located in the left and right legs and the center leg corresponding to each of the three phases to a plurality of block cores 1'l and a gap spacer 12, as shown in FIG. The upper and lower ends of each leg core 10 are magnetically connected by an upper yoke 2B and a lower yoke 2b, and a winding 3 is wound around each leg core 10. 4 will be completed.

The structure of the block iron core 11 may be one in which silicon steel plates are laminated in a rectangular shape as shown in FIG.
As shown in the figure, silicon copper plates are stacked in a stepped shape with different widths, and as shown in Figures (c) and (d), they are laminated in a radial or impolute shape. The shape is used.

Further, the gap spacer 12 is made of a non-magnetic and electrically insulating material such as ice phase or synthetic resin material. Usually, the height dimension of the block core 11 of the leg core 10 and the cylindrical dimension, ie, the thickness g, of the spacer 12 in each phase are the block core 11. The spacers 12 are formed equally, so that the overall dimension H of the leg iron core 10 is formed equally for each phase.

By the way, the vibration of the geared core reactor having the n'J configuration is caused by the magnetostrictive vibration of the block core 11 itself or the yoke 2.
The vibration of the gap portion mainly formed by the arrangement of the gap spacer 12 is thicker than the magnetostrictive vibration of a and 2b. In other words, there is a large component in which the block iron cores 11 facing each other in the gap part vibrate due to the magnetic attraction force.

In order to suppress the vibration, a strong clamping force is usually applied in the vertical direction of the core structure shown in FIG. However, due to the thickness g of the gap spacer 12 and the height tolerance of the Glock core 11, the stacked height dimension H of the famous leg core 10 is
There may be a difference between

FIG. 3 shows an example in which the stacked height of the leg core 10 located in the center is very slightly lower than the stacked height of the left and right leg cores 10, creating a gap g°. Of course, uneven gaps g' caused by such tolerances may also occur in the left or right leg core. In the presence of the above-mentioned gap g', no matter how strongly the core structure is tightened in the vertical direction, this tightening force will not effectively act on the leg core 10 where the gap g' has occurred, and the leg will Each block core 11 in the section core 10
The 12 spacers for each gap collide with each other due to their magnetic attraction force, contributing to vibration and noise. Moreover, the gap g′ is often so small that it cannot be detected by visual measurement.
Management of the vertical tightening force of each leg core is C↓i11. There was a strange problem.

[Purpose of the invention]

The object of the present invention is to provide a three-phase three-legged core reactor with gears that eliminates the drawbacks of the prior art mentioned above, makes it easy to manage the vertical clamping force of each core leg, and reduces vibration and noise. It is about providing.

[Trajectory of invention]

In order to achieve this object, the present invention makes the height of the core leg of the leg core located in the center of the leg cores of each of the three phases higher than the core leg height of the leg cores located on the left and right sides. It is characterized by what it did. The means for increasing the height of the iron core leg is to make the height or thickness of each block's iron core or gearing spacer slightly higher than the other 10 iron cores or gap spacers. This can be achieved by

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to FIGS. 4 to 6. In these figures, the same reference numerals as in FIGS. 1 to 3 indicate the same or equivalent parts.

FIG. 4 shows a situation in which the overall height of the central leg core 10 is made greater than that of the left and right leg cores io by GL according to the present invention. The vertical tightening force for each leg core I (1 is applied to the left and right leg core portions as shown in the figure P).

FIGS. 5 and 6 specifically show such a tightening configuration, in which the upper and lower yokes 2a and 2b placed above and below each leg core 10 have contact plates 4a #4b on both sides. through the fastening fitting 5a.

5b, tightening d? 6a, 6b, etc.).

The acdle winding 3, which is wound around each of the armature cores 1O, is held by fastening fittings 5a and 5b via insulators 7 above and below. 8a and 8b are the yoke 2a.

These are connecting fittings placed above and below 2b.
The upper and lower yokes 2a, 2b and each leg core 10 are firmly tightened and integrated by the upper and lower tightening rods 9a, 9b, etc. that pass through the legs. The feature of this tightening structure is that two to four upper and lower tightening rods 9a, 9b are applied at each end of the connecting fittings 8a*8b and the tightening fittings 5a, 5b, and the vertical direction of each leg iron core lO is This means tightening the parts. According to this configuration, the upper and lower tightening rods 9ae9 at both ends
By simply managing the tightening force of b, the tightening force in the vertical direction of the central core leg 10 can be obtained by the rigidity of the yokes 2 a r 2 b. When the thickness of the gap spacer 12 is made thicker than the gap spacers 12 of the left and right core legs 10 as a means of increasing the height of the central core leg 10, the winding 3 wound around the central core leg 10 Spacer 12 for the gap between the inductance and
Assuming that the thickness of the winding is G, and the number of turns of the winding wire is 30, N is L.
(Since there is a relationship of You should do more.

〔Effect of the invention〕

As described above with reference to the embodiments, the present invention provides a Sanwa three-legged iron core reactor with a gear shaft that facilitates the management of the vertical force of each iron core leg and reduces vibration and noise. I can do it.

Figure ij + j, 14] Simple explanation Figure 1 shows the conventional three-phase three-leg iron core type reactor with gear knob.
Figures 2 (,) to (a) are cross-sectional views showing examples of block iron cores, and Figure 3 is a conventional three-phase tripod with gears when a gap occurs in the center leg. A front view of an iron core reactor, FIG. 4 is a front view schematically showing the configuration of a three-phase three-legged iron core reactor with gears of the present invention, and FIG. 5 is a three-phase three-phase three-legged iron core with gears showing an embodiment of the present invention. The front view of the type reactor, Figure 6, is shown in Figure 5, and the side view of the axle.
10... Leg iron core, 11... Block iron core, 12.
・Gap spacer.

Claims (1)

[Claims] 1. A plurality of block iron cores are stacked together via gap spacers to form a leg core of a three-phase tripod, and a winding is wound around each leg, and the upper and lower sides of these leg cores are respectively wound. In a three-phase three-legged iron core type Riator magnetically coupled by a yoke, among the leg iron cores of each phase, the iron core leg height of the leg iron located in the center is the iron core leg height of the leg irons located on the left and right. A three-phase three-legged iron core reactor with a gear lug, characterized in that the iron core legs are vertically tightened by upper and lower tightening rods on both sides of the yoke. 2. In claim 1, as means for increasing the height of the core legs of the leg core located at the center, the height of one or more of the one-day cores is increased from that of the block cores of the other leg cores. A three-phase three-legged iron-core reactor with a gear, which is characterized by being higher than the height of
-y 1% -r aft jJ rh rh Iy
As a means for increasing the height of the iron core leg of the leg iron core, the height of one or more gap spacers is made higher than the height of the gap spacers of other leg iron cores. Three-phase tripod iron core reactor. 4. In claim 3, the number of turns of the winding wound around the central leg core is changed to the number of turns wound around the other leg cores so that the inductance of each of the three phases is the same. A three-phase three-leg iron core reactor O with a gear knob, characterized in that the number of turns is greater than the number of turns of the winding wire.