JP2525850Y2 - Output terminal structure of DC power supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention is a DC power supply having a plurality of switching regulator circuits and connecting positive and negative output conductors of each system to positive and negative common output terminals, respectively. The present invention relates to a structure of an output terminal for mounting a noise removing capacitor in the above.

(Prior Art) As shown in FIG. 5, a plurality of (two in the illustrated example) switching regulator circuits 2a and 2b are provided from an AC power supply 1.
(Each of the circuits 2a and 2b has the same capacity and configuration as a transformer-rectifying smoothing circuit-switching circuit-transformer-
DC output is obtained on each of the plate-shaped output conductors 3, 4, 5, and 6, and among these output conductors, the positive output conductors 3 and 5 are connected to a common positive output terminal 7. By connecting the negative output conductors 4 and 6 to the common negative output terminal 8, a DC power supply with an increased output capacity may be obtained. In order to prevent noise (especially spike noise) generated by the DC power supply from being transmitted to the load equipment, capacitors 9 and 10 for removing noise are attached to output terminals of each system.

(Problems to be Solved by the Invention) As described above, in order to realize a structure in which a plurality of systems of DC outputs are connected to common positive and negative output terminals 7 and 8, each output terminal 7 and 8 is inevitably shown in FIG. It becomes a long strip like this. In the case of such a terminal structure, the noise level due to the switching operation inside the power supply or the like becomes high in the central part a of the output terminals 7 and 8, that is, in the part apart from both ends b close to the connection part of the capacitors 9 and 10. There is a problem. The reason is that the output terminals 7 and 8 serve as antennas, the impedance between the vicinity of the connection part b and the center part a increases the noise level of the center part a, and the case where a relatively large current flows. This is because a voltage drop occurs between b and a.

In view of the above-mentioned problems, the present invention can reduce the noise level of the output terminal and have a good appearance in a DC power supply in which the output conductors of a plurality of switching regulator circuits are connected to a common output terminal. An object of the present invention is to provide an output terminal structure.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a plurality of switching regulator circuits, and integrates positive and negative output conductors of each system with positive and negative common output terminals, respectively. Connect the output conductor of each system with a noise removal capacitor,
Attachment pieces are formed at common output terminals different from the capacitor connection portion, a part of each attachment piece is located in a power supply case, and a noise removing capacitor is provided between the attachment pieces of both output terminals in the case. It is characterized by being attached.

(Operation) In the present invention, since the common output terminal located apart from the connection of the noise removing capacitor provided between the output conductors of each system is connected by the noise removing capacitor, the noise level of the output terminal is reduced. Reduced.

(Embodiment) FIG. 1 is a perspective view showing an embodiment of an output terminal structure according to the present invention, FIG. 2 is an exploded perspective view of the output terminal of the embodiment, and FIGS. It is sectional drawing which shows the attachment structure of an output terminal. As shown in FIG. 2, the positive output terminal 11 is connected to the two positive output conductors 3, 5 at both ends b.
Connection pieces 12 and 13 which are bent horizontally so as to be connected to the output conductors 3 and 5, respectively.
And a screw hole 16 for mounting a capacitor. Further, a capacitor mounting piece 18 bent in the same direction as the connection pieces 12 and 13, that is, toward the power supply case 17 (see FIGS. 3 and 4) is formed in the center portion a. A screw hole 20 is provided.

On the other hand, the negative electrode output terminal 21 has connection pieces 22 and 23 connected to the two systems of the negative electrode output conductors 4 and 6 at both ends b, and the connection pieces 22 and 23 are connected to the output conductors 4 and 6 respectively. It has a mounting hole 25 and a screw hole 26 for mounting a capacitor. Also, the central part a
In the same manner as described above, the power supply case 17 has a capacitor mounting piece 28 bent horizontally toward the power supply case 17 side, and the capacitor mounting piece 28 is provided with a screw hole 30. Further, the connection pieces 22, 23 and the capacitor mounting piece 28 are in contact with and adjacent to the connection pieces 12, 13 and the capacitor mounting piece 18 of the positive output terminal 11,
The width and spacing of each piece are set.

As shown in FIGS. 1 and 3, the positive and negative output terminals 11,
21 is attached by superposing the connection pieces 12 and 22 on the output conductors 3 and 4 of one system, inserting the screws 31 into the mounting holes 15 and 25, and screwing into the screw holes 32 provided in the output conductors 3 and 4. . Each connection piece 12 and 22 has an L-shaped mounting bracket 33.
Is fixed with a screw 34 screwed into the screw hole 16, and a noise removing capacitor is fixed to the mounting bracket 33 by using a screw 35.
The board 37 with 36 is mounted.

Similarly, the other connection pieces 13 and 23 are overlapped with the connection pieces 13 and 23 on the output conductors 5 and 6, and the screws 31 are inserted into the mounting holes 15 and 25 and screwed into the screw holes 32 provided in the output conductors 5 and 6. By mounting. Similarly, an L-shaped mounting bracket 33 is fixed to each of the connection pieces 13 and 23 by a screw 34 screwed into the screw hole 16, and a noise removing capacitor 36 is fixed to the mounting bracket 33 by using a screw 35. The mounting board 37 is mounted.

As shown in FIGS. 1 and 4, capacitor mounting pieces 18 and 28 provided at the center of each of the positive and negative output terminals 11 and 21 have:
Each of the L-shaped mounting brackets 40 is fixed by screws 41 screwed into the screw holes 20 and 30, and a board 43 on which a noise removing capacitor 42 is mounted is mounted to these mounting brackets 40 by screws 44.

As shown in FIGS. 3 and 4, the connecting pieces 12, 2
2, 13, 23 and the capacitor mounting pieces 18, 28 are inserted inside the power supply case 17, and the inserted portions of the output conductors 3 to
6 and the mounting of the capacitor mounting boards 37 and 43 are performed.

As described above, not only the capacitors 36 are provided at both ends b connected to the output conductors 3 to 6 of the output terminals 11 and 21, but also the center part a apart from these parts b is connected by the noise removing capacitor 42. By doing so, it is possible to reduce the noise level at the central portion a, and furthermore, the noise level at the entire output terminals 11 and 21, and to reduce the propagation of noise to the load. Note that the holes 4 provided in the output terminals 11 and 21
Numerals 5 and 46 are for fixing a conductor plate serving as a power input terminal of the load device with bolts and nuts (both not shown), and one power source of one load device is connected to the output terminals 11 and 21 respectively. In general, input terminals are connected.However, power input terminals of different load devices may be connected to each of the holes 45 and 46, or every few holes. Is reduced.

Although the above embodiment has been described in connection with the case where the number of switching regulator circuits connected in parallel is two, the present invention can be applied to the case where there are three or more switching regulator circuits.

(Effects of the Invention) According to the present invention, the noise removal capacitor can be connected not only between the connection portions of the noise removal capacitor between the output conductors of a plurality of systems, but also at the output terminal far from the connection portion. Therefore, even when a band-shaped output terminal is used, a power supply with a reduced noise level can be provided.

In addition, since the mounting piece of the noise removing capacitor is placed in the power supply case and the capacitor is mounted in the power supply case, it is excellent in terms of aesthetics, safety and handling.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an output terminal structure according to the present invention, FIG. 2 is an exploded perspective view of the output terminal of the embodiment, FIG.
FIG. 4 and FIG. 4 are cross-sectional views showing the mounting structure of the output terminal to the power supply case at the end and center thereof, and FIG. 5 is a configuration diagram showing the structure of a conventional output terminal. 3-6: Output conductor, 11, 21: Output terminal, 12, 13, 22, 23: Connection piece, 15, 25: Mounting hole, 16, 20, 26, 30: Screw hole, 17:
Power supply case, 18, 28: Capacitor mounting piece, 33, 40: Mounting bracket, 36, 42: Noise removal capacitor, 37, 43: Board

Claims (1)

(57) [Scope of request for utility model registration] 1. A system comprising a plurality of switching regulator circuits, wherein positive and negative output conductors of each system are integrated with common positive and negative output terminals, respectively, and the output conductors of each system are connected by a noise removing capacitor. A mounting piece is formed at a common output terminal different from the capacitor connection part, a part of each mounting piece is located in a power supply case, and a noise removing capacitor is mounted between the mounting pieces of both output terminals in the case. An output terminal structure for a DC power supply.