JPS60154607A - 3-phase reactor with gap - Google Patents

Abstract

PURPOSE:To suppress vibration of block ion core and that between spacer and yoke by forming the iron core leg at the center in the height lower than the iron core legs in both sides and pressing upper and lower yokes to the iron core legs with a tightening rod. CONSTITUTION:A center iron core leg 3B is formed lower than iron core legs 3A, 3C in both sides. Windings 4A, 4B, 4C are arranged around the iron core legs 3A, 3B, 3C yokes 5A, 5B are pressed with intensive force to the iron core legs 3A, 3B, 3C by tightening rods 6A, 6B, 6C and tightening nuts 7A, 7B, 7C without gap at the upper end of the center iron core leg 3B. Since the yokes 5A, 5B and iron core legs 3A, 3B, 3C are tightened without any play, vibration of spacer 2 for gap between a block iron cores 1 can be eliminated perfectly, not resulting in a problem of noise.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an iron core type three-phase reactor with a gear.

[Background of the invention]

Generally, in a gap (J core type three-phase reactor, as shown in Fig. 1, block cores 1 of various shapes such as a short two-stage shape, a radial shape, or an involute shape are sequentially connected through a gap spacer 2. Stack three core legs 3 at the same height (3Δ).

3B, 3C), arrange the winding 4 around each core leg 3, and connect the core leg 3 to the yoke 5 (5Δ) from below.

5I3).

When a current flows through the winding 4 in such a gear-shaped three-way reactor, the core leg 3 becomes a magnetic path, as shown by the line 2 in Figure 1. If there is a gap between the core leg 3 and the yoke 5 or if there is play between the block cores 1 and 1, the gap spacer 2 is inserted between the yoke 5 and the plotter core, or if there is a gap between the yoke 5 and the plotter core. The iron core 1.1 is alternately magnetically attracted and vibrates, rlj! There was a difference between j1Δ that caused the sound.

Therefore, as shown in 1, 2+ is tightened with 1" bolt 6, and with nuts 1 to 7, the yoke 5Δ, 5■3 is connected to iron 4+I.
ll: By pressing S four times, the gap spacer 2, which is also an elastic body, is shaken II! jJ is suppressed.

However, in reality, the gap spacer 2. 1 of block iron core 1: There is a tolerance in the lower height, and the upper and lower heights of each core leg 3 may be different as shown in FIGS. 3 and 4.

For example, as shown in FIG. 3, if the both side core legs 3A, 3C are lower than the center core leg 3B and gaps C, C2 are created between them and the upper yoke 5A, the winding line 4
When a current flows through the iron core legs 3B and 3C, a magnetic path is formed between the yoke 5A and the iron core leg 3B.

Due to the magnetic attraction force generated at the upper end of the yoke 3C, the yoke 5A causes a seesaw phenomenon with the upper end of the central core leg 3B as a fulcrum, as shown by the two-dot chain line in FIG. (1; C sound collides with the gap spacer 2 arranged at the upper end.Furthermore,
Due to this seesaw phenomenon of the yoke 5A, the upper and lower yokes 5A,
When the rod 5B is tightened 4-1, tensile stress corresponding to the magnetic attraction force is repeatedly applied to the rod 6, causing a problem of fatigue failure of the rod 6.

Also, as shown in FIG. 4, only one core leg, for example, core leg 3G, is connected to the other two core legs 3A.

The same applies when the value is lower than 3B.

[Object of the Invention] The object of the present invention is to suppress mutual vibration between a block core and a spacer yoke, and to create a gap in which there is no risk of fatigue failure of the yoke tightening rod provided for vibration suppression. (J' The purpose is to provide a three-phase reactor.

[Summary of the invention]

The gear holder according to the present invention is configured such that when the center core leg is formed lower than both side core legs, the lower yoke is pressed against the core leg by a tightening rod. With this configuration, each core leg has -
The above object is achieved because there is no downward play in the yoke and no seesaw phenomenon occurs in the yoke.

[Embodiments of the invention]

Next, an embodiment of a three-phase reactor with a gap according to the present invention will be described based on the drawings.

FIG. 5 is a diagram showing the three gear gear supports 1 to 3 according to this embodiment.

In this figure, the code 1 is the block center ζ, the code 5″f2
is a gap spacer, code 3 (3A, 313°3G)
is a core leg formed by sequentially stacking block core 1 and gap spacer 2, symbol 3B is center G1≦core leg,
Reference numerals 3A and 3C indicate core legs arranged on both sides of the central core leg 313.

The core legs 3A and 3C on both sides are formed so that their lower heights are the same, while the center core leg 3B is formed so that its vertical height is lower than that of the core legs 3A and 3G on both sides. It is formed. As a means for making the vertical height of the central core leg 3B lower than the vertical height of both core legs, as shown in FIG. 2 lower height to other 2 legs 3A, 3G
The vertical height of the gap spacer 2 forming the central core leg 3B may be made smaller than that of each block core forming the core legs 3A on both sides.

There are various methods, such as making the height lower than the vertical height of the cap spacer 2 forming the cap spacer 3C.

Winding wires 4 are placed around each of these core legs 3A, 3B, and 3C.
(4A, /IB, /IC) are located.

Each core leg 3A, 3B, 3G is an upper yoke 5A and a lower yoke 5.
The upper and lower yokes 5A,
5Bn-1], the tightening rod 6 (6A, 6B,
6G) and tightening nuts 1 to 7 (7A.

7B, 7G), the yokes 5A, 5B are attached to each core leg 3.
Press strongly against Δ, 3B, and 3G, and press the center core leg 3.
The structure is such that no gap is formed between the two ends of the BJ. Alternatively, a magnetically permeable thin plate is interposed between the central core 3 and the second yoke 5A, so that the core legs 3A, 3B, and 3C are at the same height, and are further tightened with a tightening nut 7.

According to this embodiment, the yokes 5A, 5B and each core leg 3A, 31() are connected by the tightening nuts 1 to 7 and the rod 6.

Since the gap spacer 2 between the block cores 1 and 1 does not vibrate upward and cause noise, the spacer 2 is tightened to prevent play from occurring between the block cores 1 and 3G.

In addition, the core legs 3A and 3C on both sides of the central core leg 3B are
Since the upper yoke is formed with a lower height, even if current flows through the winding 4 and the core leg 3 becomes a magnetic path, a seesaw phenomenon will not occur in the upper yoke 5A. j/J3
Since the upper yoke 5A hits the gap spacer 2 disposed at the two ends of A and 3C, noise does not become a problem.

Furthermore, since no seesaw phenomenon occurs in the upper yoke, no repetitive stress is applied to the tightening rod 6, and there is no fear that the tightening rod 6 will be damaged due to fatigue fracture.

〔Effect of the invention〕

As is clear from the above description, (1) according to the present invention, the iron for tightening the yoke does not suffer from fatigue failure, the vibration peculiar to the reactor, and the accompanying noise are eliminated.
A phase reactor is obtained.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional gap-iri three-phase reactor.
2nd IA is a front view thereof, FIGS. 3 and 4 are diagrams of the conventional example in which a gap is formed between the CPi iron and the core legs, and FIG. 5 is a three-phase reactor with a gap according to the present invention 1-
FIG. 1...Block core, 2...Gap spacer,
3 (3A, 3B, 3C)... Iron core legs, 4 (4A, 4
B. 4C)...Winding, 5(5A, 5B)...Yoke, 6(
6A, 6B, 6C)...Yoke tightening iron, 7 (7
A, 7B, 7C)...Yoke tightening nut 1~.

Claims (1)

[Claims] 1. Three iron core legs made by stacking 18 block iron cores via gap spacers are arranged side by side.
In a three-phase reactor with a gap, both ends of which are fixed by yokes, and the core legs are tightened in the downward direction by tightening irons placed between the upper and lower yokes, the central core leg is A three-phase actuator with a gear joint that is characterized by its height being lower than the height of the iron core legs on both sides.