JPH084733Y2 - Noise filter for 3-phase power supply - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a relatively large-sized three-dimensional power source which is inserted into a power line of an electronic device using a three-phase AC power source.
It relates noise filter phase power supply, in particular to its internal implementation structure.

[0002]

BACKGROUND OF THE INVENTION noise filter for 3-phase power supply as shown in FIG. 5, a choke coil L1, L2, L3 which is inserted in series to each phase of the line, a capacitor C1 connected between each line on the input side , C2, C3 and capacitors C4, C5, C6 connected between the lines on the output side.

Conventionally, the choke coils L1, L
2, L3 are one component in which coils for three phases are wound so as to divide the circumference of one toroidal core into three equal parts.
This large ring choke coil is installed in the case. An input terminal block and an output terminal block are provided on both sides of the case. Each terminal block has three terminals arranged in a straight line. The three input ends of the choke coil are connected to the respective terminals of the input terminal block, and the three lead wires on the output side are connected to the three terminals of the output terminal block. In addition, the lead wires of capacitors C1, C2, C3 are bent and wired to the three terminals of the input terminal block, and similarly, the lead wires of capacitors C4, C5, C6 are bent and connected to the three terminals of the output terminal block. To do.

[0004]

An invention to be Solved] In the conventional three-phase power supply noise filter as described above, the output terminal board input terminal block on either side of the case are respectively provided with three terminals in each terminal block Are arranged on a straight line. Therefore, the mounting structure of each component is symmetrical about the input and output,
Since the layout is asymmetrical with respect to each line of the three-phase power supply, the bent shape of the lead wire of the choke coil and each capacitor and its wiring pattern are not uniform, and each component should be arranged in a small space in an orderly manner. I couldn't. Therefore, the whole becomes very large, and the work of attaching the parts and the work of bending the lead wires are troublesome.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to have a symmetrical structure on the input side and the output side and also to be symmetrical with respect to each line of the three-phase power supply. a structure is to provide a compact three-phase power supply noise filter orderly arranged compactly each part.

[0006]

Means for Solving the Problems] 3-phase power supply noise filter according to this invention is a choke coil wound with three phases of coils to 3 divide the circumference of the filtrated Idarukoa, axial this choke coil They are sandwiched in the same direction and are fixed to each other in a state where they are integrated as a whole,
Two a disc type plate that, each plate three terminal blocks fitting attached to 3 equally divided positions circumferentially respectively to the two plates, wherein the two plates taken of the terminal block fitting
The positioning part is integrally formed in the part between the attachment positions.
And a respective plate three capacitors mounted by fitting the positioning portion of the terminal blocks brackets are inserted and terminal portions for external connection, the lead wire of the coil screw portion is formed on the outer periphery Of the through holes to be connected to each other, two pins for connecting the lead wires of the capacitor, and the through holes of the through holes.
A nut that engages with the threaded portion, and two lead wires of the capacitor are connected to the pins of the two terminal block fittings of the plate, respectively.

[0007]

The upper plate and the lower plate are divided into the input side and the output side, respectively, and the mounting structure is symmetrical with respect to the input side and the output side. Further, each of the plates has a rotationally symmetric mounting structure of 120 °, and has a symmetrical structure with respect to each line of the three-phase power supply.

[0008]

EXAMPLES indicates to FIGS to the noise filter for 3-phase power supply according to an embodiment of the present invention configured. In FIG. 1, reference numeral 1 is a choke coil, which is formed by winding coils 3, 3, 3 for three phases so as to divide the circumference of a toroidal core insulated by a core case 2 into three equal parts. The three input side lead wires 4, 4, 4 project, and the three output side lead wires 5, 5, 5 project downward. The input side lead wires 4 are arranged at rotationally symmetrical positions at intervals of 120 °, and the output side lead wires 5 are arranged in the same manner.

The above choke coil 1 is vertically sandwiched by two plastic disk-shaped plates 6 and 6 to be integrated as a whole. 120 on the inner surface of the plate 6
3 legs 6a are formed at intervals of 1 ° and 1
Ribs 6b extending in the radial direction are formed at intervals of 20 °. When the ribs of the core case 2 are meshed with the ribs 6b of the plates 6 so that the plates 6 and 6 face each other, the legs 6a are formed.
The tips of are joined together. A through hole is formed in the leg portion 6a, and the fixing pins 7, 7, 7 are press-fitted into the through hole so that the whole is integrated.

Three terminal block fittings 8 shown in FIG. 3 are attached to the plate 6 at intervals of 120 ° in a rotationally symmetrical arrangement. The terminal block metal fitting 8 includes a terminal portion 8a for external connection, a through hole portion 8b for inserting and connecting the lead wires 4 and 5 of the choke coil 1, and two pins 8c for connecting the lead wire 10 of the capacitor 9. , 8c and a nut 8d that engages with the outer peripheral threaded portion of the through hole 8b. The plate 6 is formed with holes having positions and shapes corresponding to the terminal portion 8a, the through hole portion 8b, and the pin 8c of the terminal block metal fitting 8. The terminal block metal fitting 8 is attached from the inner surface side of the plate 6 to the terminal portion 8a. , The through hole 8b and the pin 8c are projected to the outer surface side of the plate 6. Then, the nut 8d is screwed into the projecting through hole 8b to fix the terminal block fitting 8 to the plate 6.

A positioning portion 6c of the capacitor 9 is formed integrally with the plate 6 at a portion between the mounting positions of the terminal block fittings 8 on the outer surface side of the plate 6. The capacitor 9 is fitted into the positioning portion 6d and attached, and the two lead wires 10 and 10 are attached to the two adjacent terminal block fittings 8 and 8.
The pins 8c and 8c are entwined with each other and connected.

Further, the input side lead wires 4, 4, 4 of the choke coil 1 are connected to the three terminal block fittings 8 of the upper plate 6,
8 and 8 through holes 8b, 8b, 8b are press-fitted and connected. Similarly, the output side lead wires 5, 5, 5 are also press-fitted and connected to the terminal block fittings 8, 8, 8 of the lower plate 6.

As described above, the three choke coils 1
The coils 3, 3, 3 for the phases, the three capacitors 9, 9, 9 attached to the upper plate 6 and the three capacitors 9, 9, 9 attached to the lower plate 6 The noise filter of the circuit shown in FIG.
The three terminal portions 8a, 8a, 8a of FIG. 3 serve as input terminals, and the terminal portions 8a, 8a, 8a of the lower plate 6 serve as output terminals.

[0014]

[Effect of the invention] 3-phase power supply noise fill <br/> data according to this invention, the choke coil of the toroidal has a structure that is integrated through insertion at the two plates of the disc-shaped, the upper and lower The plates have a vertically symmetrical mounting structure on the input side and the output side, respectively, and also have a rotationally symmetrical mounting structure on both plates at 120 ° intervals with respect to each line of the three-phase power supply. Therefore, the bent shape of the lead wire and the wiring pattern of each component are the same, the arrangement of the capacitors is rotationally symmetrical and orderly, the entire size can be made smaller than the conventional one, and the mounting work thereof is very easy. That is, regarding the input side and the output side
The two symmetrical plates axially move the choke coil.
It is fixed to each other by sandwiching it in one direction and integrating it as a whole
Therefore, the choke coil is securely fixed and
Problems such as scratches and rattling do not occur. Therefore, the noise
It will be easier to implement the filter as a whole
The reliability as a product is improved. Also, on the plate
Has a positioning part for fitting the capacitor.
Therefore, the mounting work of the capacitor is easy.
At the same time, the condenser is securely fixed and
No problems such as backlash will occur. In addition, the
For connecting a capacitor to the choke coil and input / output terminals
Hit the pin of the terminal block fitting with 2 of the capacitor.
Since it is only necessary to connect the lead wires of a book,
The circuit connection work of the service becomes easy. Furthermore, the terminal
By adjusting the tightening of the nut of the bracket
To fix the terminal block bracket to the plate at a certain pressure.
The desired mounting strength can be obtained.

[Brief description of drawings]

1 is an exploded perspective view of a three-phase power supply noise Fi <br/> filter according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same noise filter.

FIG. 3 is a perspective view of a terminal block fitting in the above noise filter.

FIG. 4 is a perspective view of a capacitor mounting portion of the noise filter of the above.

FIG. 5 is a circuit diagram of the noise filter of the above.

[Explanation of symbols]

 1 choke coil 2 core case 3 coil 4 input side lead wire 5 output side lead wire 6 plate 6a leg 6b rib 6c positioning part 7 fixing pin 8 terminal block metal fitting 8a terminal part 8b through hole 8c pin 8d nut 9 capacitor 10 lead line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masami Nonaka 5-36-11 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (56) References: 62-68210 (JP, U) 56-22936 (JP, U) Actual opening Flat 2-100332 (JP, U) Actual opening Sho-58-64122 (JP, U)

Claims (1)

[Scope of utility model registration request] A choke coil 1. A wound three phases of coils to 3 divide the circumference of collected by filtration Idarukoa, are fixed to each other in a state that combines the entire sandwich the choke coil in the axial direction 2 made of insulators of the same shape
Like a disk-type plate, and each plate three terminal blocks fitting attached to 3 equally divided positions circumferentially respectively to the two plates, wherein the two plate mounting position of the terminal block fitting
The positioning part is integrally formed in the part between the
And a respective plate three capacitors mounted by fitting the-decided Me unit, each terminal block fitting insertion and a terminal portion for external connection, the lead wire of the coil screw portion is formed on the outer periphery Through-hole portion to be connected with each other, two pins for connecting the lead wire of the capacitor, and the through-hole portion of the through-hole portion
And a nut that engages with the screw part,
Noise filter for 3-phase power supply, wherein the book leads that are connected to the pins of two of said terminal block fitting in said plate.