JP2009021376A - Dc power supply unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a DC power supply unit with capacitors, being of space saving, and eliminating the need for field assembly for sure and easy quality control. <P>SOLUTION: A DC power supply unit 1 includes a module housing structure 50 of tall shelf frame storing a power supply module 40 where a plurality of capacitors units 10 (three in figure 1) are supported for connection in series and a module shelf 51 for storing the power supply module 40 removably, in vertically multiple stages (five stages in figure 1). The power supply modules 40 stored, vertically in five stages, in the module shelves 51 of the module storing structure 50, are connected together in series to constitute a DC power supply circuit of constant voltage. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a DC power supply device installed in an electric room or the like, and more particularly to a DC power supply device in which a constant voltage DC power supply circuit is configured by connecting a plurality of capacitors such as an electric double layer capacitor in series.

  A large-capacity DC power supply unit that can instantaneously extract a stable DC constant voltage as the power supply for the instantaneous voltage drop countermeasure device (instantaneous voltage reduction device) that compensates for voltage drops that affect production lines such as lightning. Is used. In general, the DC power supply apparatus is configured by forming a constant voltage DC power supply circuit by connecting a large number of capacitors such as an electric double layer capacitor and an electrolytic capacitor in series (see, for example, Patent Document 1).

The capacitor-use DC power supply device includes a capacitor unit in which a plurality of capacitors are housed in an insulating housing and connected in series, and the plurality of capacitor units are connected in series. A single capacitor unit is configured as a DC constant-voltage power supply, for example, similar to an automobile battery. A plurality of capacitor units necessary as a DC power supply for the instantaneous voltage drop countermeasure device are assembled, for example, on a base in a switchgear, and a plurality of capacitor units are wired in series to construct a DC power supply.
JP 2006-217688 A

  Since the housing of the capacitor unit has a pair of positive and negative electrode terminals protruding on the upper surface in the same manner as an automobile battery, it is difficult to stack a plurality of capacitor units. Usually, a DC power supply device is constructed by stacking a plurality of capacitor units horizontally and vertically on a base stand or the like. For this reason, the installation space for the DC power supply device becomes large, and it is difficult to secure the installation space for the instantaneous voltage drop countermeasure device in an electrical room or the like. In addition, since multiple capacitor units are individually packed and transported to the construction site and assembled locally, not all quality checks can be performed in the DC power supply manufacturing factory, and quality reconfirmation work is required after local assembly. There was a problem in quality control and construction work at the site.

  An object of the present invention is to provide a direct-current power supply device that is space-saving, eliminates the need for on-site assembly, and ensures quality control reliably and easily.

  In order to achieve the above object, the present invention has a capacitor unit in which a plurality of capacitors housed in an insulating housing are connected in series and a unit support structure that supports the plurality of capacitor units in parallel, and the plurality of capacitor units are connected in series. And a shelf frame-shaped module housing structure having a plurality of module shelves in which a power module can be inserted and removed in a plurality of stages.

  Here, a hard resin housing such as plastic can be applied as the insulating housing. A plurality of capacitors are housed in parallel inside the housing, and the capacitors are connected in series to form one constant voltage DC power supply circuit. As the capacitor, a flat electric double layer capacitor or an electrolytic capacitor can be applied. The same type of the same size is desirable for the plurality of capacitors housed in the housing. A single capacitor unit is configured by connecting a positive electrode end and a negative electrode end forming both ends of a DC power supply circuit in which a plurality of capacitors are connected in series to a positive electrode terminal and a negative electrode terminal fixed on the upper surface of the housing. A single capacitor unit is smaller and lighter than an automobile battery (lead-acid battery). The external appearance of the single capacitor unit may be a rectangular parallelepiped shape similar to that of an automobile battery. A plurality of capacitor units of the same size are juxtaposed in a row on a shelf-like unit support structure and connected in series to form a single power supply module. A module storage structure having module shelves in upper and lower stages can be applied to a light rack frame having a vertically long shelf frame shape such as a steel rack. The internal space of the module housing structure is divided by upper and lower multistage module shelves, and the power supply modules are manually stored in the divided upper and lower multistage storage spaces, and the power supply modules are pulled out from the respective storage spaces. When a vertical surface of the vertically long rectangular parallelepiped module storage structure is the front surface, the power supply module can be inserted and removed only on the front surface side. By storing the power supply module individually in each module shelf of the module storage structure, a plurality of power supply modules are stored in the upper and lower multi-stages in the internal space of the module storage structure, and each power supply module is connected in series to form a single DC power supply Built. The installation space for such a DC power supply device may be the installation space for one module housing structure, and a great space saving can be achieved.

  In the present invention, the housing of the capacitor unit has a rectangular parallelepiped shape having left and right surfaces, front and rear surfaces, and upper and lower surfaces, and a positive electrode of a DC power supply circuit configured by connecting a plurality of capacitors in series at both left and right end portions of the upper surface of the housing. An electrode terminal for the electrode and an electrode terminal for the negative electrode can be provided. In this case, the left and right surfaces, front and rear surfaces, and bottom surface of the housing should be flat without any protrusions such as electrode terminals, and without mounting means such as screw holes or mounting pins for mounting the housing to external equipment. Can do. Such a housing has a structure similar to that of a vehicle battery housing, and the vehicle battery mounting structure can be applied to the capacitor unit mounting structure.

  In the present invention, the unit support structure includes a base on which the housings of the plurality of capacitor units are arranged in close contact with each other in a row, and the housings juxtaposed on the base are orthogonal to the left and right surfaces of the housing. A pair of front and rear presser plates and left and right presser plates that are pressed against each other from the front and rear direction and the right and left direction perpendicular to the front and rear surfaces to position and fix each housing on the base, and pressed against the center of the upper surface of each housing Thus, a structure having an upper pressing plate for fixing each housing on the base can be obtained. In this case, the base, the front and rear presser plates, the left and right presser plates, and the upper presser plate can be pressed against the housing of the capacitor unit via the sheet-like cushion material.

  In this case, an angle steel with an L-shaped cross section that is screwed onto the base can be applied to the front and rear presser plates and the left and right presser plates, and a grooved steel can be applied to the upper presser plate. The upper holding plate of slotted steel is placed across the housing at the center of the top surface of each housing of a plurality of capacitor units arranged in a row, and both ends protruding from the housing are fixed to the base with stud bolts. That's fine.

  Further, in the present invention, a plurality of housings are juxtaposed on the base of the unit support structure so that the polarities of the electrode terminals of the adjacent housings are alternately reversed, and the electrodes of the adjacent housings are juxtaposed. Adjacent capacitor units can be connected in series by connecting terminals with insulated wires. In this case, the insulated wires connecting the adjacent capacitor units in series can be shortened, and the wiring work is facilitated.

  In addition, a positive lead connection conductor and a negative lead connection conductor are fixedly disposed on each of the plurality of housings together with an upper presser plate on both sides of the upper presser plate via insulators. In addition, the negative electrode lead-out connection conductor can be connected to the positive electrode end side and the negative electrode end side of a DC power supply circuit configured by connecting a plurality of capacitor units in series. Further, the front end portions of the pair of connection conductors are disposed above the foremost capacitor unit of the plurality of capacitor units arranged in the front and rear, and a plurality of power supply modules housed in the plurality of module shelves of the module housing structure are connected to the pair. A series connection can be made at the front end of the conductor.

  The module housing structure here is configured such that the power supply module can be taken in and out only from the front side. By doing in this way, the operation | work of putting in and out of a power supply module and the serial connection operation | work of the several power supply module accommodated in the module storage structure can be performed in the front of a module storage structure, and efficiency of each operation | work can be achieved.

  According to the DC power supply device of the present invention, since a large number of capacitor units constituting a single DC power supply circuit by housing a plurality of capacitors are accommodated in a multi-stage upper and lower stages in a module housing structure, a high voltage in which a large number of capacitor units are connected in series. The installation space for the DC power supply device can be greatly reduced. In addition, a DC power supply can be produced at the factory by storing and wiring a single power supply module on each of the upper and lower module shelves of the module storage structure, checking the quality in the factory, and transporting it to the site as it is for installation. The quality control becomes easy, and there can be an excellent effect that the construction workability at the site is improved.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  A DC power supply device 1 shown in FIG. 1 is a vertically long power supply module 40 that has a plurality of capacitor units 10 and that is connected in series, and a module shelf 51 that accommodates the single power supply module 40 so that it can be inserted and removed. A shelf frame-shaped module storage structure 50 is provided. By storing the power supply module 40 one by one in each of the plurality of module shelves 51 of the module storage structure 50, a large number of capacitor units 10 are stored in the module storage structure 50 in multiple upper and lower stages, and a large number of capacitor units 10 are connected in series. A single DC power supply 1 is manufactured and assembled at a factory. The DC power supply device 1 manufactured and assembled in the factory is checked for quality in the factory, transported to the site where the switchgear and the like are installed, and laid.

  The module housing structure 50 shown in FIG. 1 has module shelves 51 in five upper and lower stages, and the power supply modules 40 are manually inserted into and removed from each module shelf 51. The single power supply module 40 is configured by positioning and fixing a plurality of (three in FIG. 1) capacitor units 10 in parallel on a rectangular dish-shaped unit support structure 20, and connecting the three capacitor units 10 in series. Composed. The three capacitor units 10 have the same structure and will be described with reference to FIGS.

  FIG. 2A is a perspective view of a single capacitor unit 10 and includes a rectangular parallelepiped insulating housing 11. A plurality of capacitors C as shown in the equivalent circuit diagram of FIG. All the plurality of capacitors C are connected in series to form a single constant voltage DC power supply circuit 12. The capacitor C is, for example, a multilayer electric double layer capacitor having a large storage capacity. The positive electrode end (+) and the negative electrode end (−), which are both ends of the DC power supply circuit 12, are connected to the positive electrode terminal 13 and the negative electrode terminal 14 protruding from the left and right ends of the upper surface 11 a of the housing 11. The left and right surfaces of the housing 11 are referred to as the left and right surfaces 11b, and the front and rear surfaces are referred to as the front and rear surfaces 11c. The housing 11 has a structure such as electrode terminals 13 and 14 only on the upper surface 11a, and the lower surface 11d, the left and right surfaces 11b, and the front and rear surfaces 11c of the housing 11 are means for mounting the housing 11 to an external device (mounting holes, mountings). It is a flat surface having no pins. A plurality (three in FIG. 1) of capacitor units 10 having the same structure are juxtaposed in a row on a unit support structure 20 having a single plate structure, and are positioned and fixed. With the front and rear surfaces 11c of the three housings 11 in contact with each other, the three capacitor units 10 are fixed in parallel on the unit support structure 20, and the three capacitor units 10 are connected in series to form a single power supply module. 40 is manufactured and assembled in the factory.

  A specific example of the unit support structure 20 will be described with reference to FIGS. The unit support structure 20 is bolted to the base 21 as shown in FIG. 3, a rectangular plate-shaped base 21, a pair of left and right presser plates 23 and front and rear presser plates 24 that are screwed to the base 21. One upper presser plate 25 is provided.

  The base 21 is made of sheet metal, and includes a rectangular bottom plate 21a, an upright plate 21b bent at right angles from four sides of the bottom plate 21a, and an upper side plate 21c bent at right angles inward from the upper sides of the four upright plates 21b. Have A sheet-like cushion material 22m such as a rubber plate is fixed on the bottom plate 21a. As shown in FIG. 4, a pair of left and right presser plates 23 and a pair of front and rear presser plates 24 are movable in the corresponding left and right and front and rear directions on each side of the upper side plate 21c forming four rectangular sides. It is attached with a screw 26. Each of the pair of left and right presser plates 23 and the pair of front and rear presser plates 24 is an angle steel with a longitudinal section L shape, and a cushion material 22n is fixed to each vertical inner surface. As shown in FIG. 5, three capacitor units 10 are accommodated in a rectangular space surrounded by the inner surfaces of the pair of left and right presser plates 23 and the pair of front and rear presser plates 24.

  The three capacitor units 10 are inserted into the bottom plate 21a of the base 21 from a rectangular space surrounded by the inner surfaces of the pair of left and right presser plates 23 and the front and rear presser plates 24, and placed on the cushion material 22m of the base plate 21a. Is done. In addition, the three capacitor units 10 are juxtaposed on the base 21 by alternately inverting the directions so that the polarities of the electrode terminals of the adjacent housings are different from each other. In the three capacitor units 10 shown in FIG. 5, the two polar directions at the front and rear end portions are the same, and only the central one has the polarity direction inverted by 180 °. After the three capacitor units 10 are juxtaposed on the base 21, the left and right presser plates 23 and the front and rear presser plates 24 are moved forward to push the housings 11 of the three capacitor units 10 in parallel through the cushion material 22n. Hit it. The pair of left and right pressing plates 23 are collectively pressed against the left and right surfaces 11b of the housings 11 of the three capacitor units 10 to position the housings 11 in the left-right direction. The pair of front and rear pressing plates 24 is pressed against the front and rear surfaces 11c of the two housings 11 at both front and rear ends of the three capacitor units 10 arranged in the front and rear, and positions the three housings 11 in the front and rear direction. By pressing the pair of front and rear presser plates 24, the front and rear surfaces of two adjacent housings are pressed against each other, and three central one housings in parallel are fixed. The holding plates 23 and 24 that position the three housings 11 from the front, rear, left and right are screwed to the base 21, and the three capacitor units 10 are positioned and fixed to the base 21 from the left and right front and rear directions.

  Next, one upper presser plate 25 is pressed onto the upper surface 11 a of each housing 11 of the three capacitor units 10 via a cushion material (not shown) fixed to the lower surface of the upper presser plate 25. The upper presser plate 25 is, for example, a groove-shaped steel plate having high mechanical strength, and is placed so as to cross the central portion of the upper surface of each housing 11 of the capacitor units 10 arranged in parallel. The front and rear ends of the upper pressing plate 25 slightly protrude from the two housings 11 at the front and rear ends of the three parallel housings 11. The protruding front and rear ends and the base 21 are connected with stud bolts 28 and tightened with nuts 29 to fix the upper presser plate 25 to the upper surfaces 11 a of the three housings 11. In a state where each of the three capacitor units 10 is fixed to the base 21 with the upper presser plate 25, the three capacitor units 10 are connected in series with a plurality of types of unit wiring members 30 as shown in FIG. The power module 40 is configured.

  The three capacitor units 10 in parallel with the unit support structure 20 are supported through cushioning materials corresponding to the front and rear surfaces, the left and right surfaces, and the upper and lower surfaces of each housing 11. For this reason, the cushion material absorbs vibrations during assembly manufacture and transportation of the power supply module 40, thereby preventing the displacement of the three parallel capacitor units 10 and the reduction of the mounting strength. Further, since the positional shift between the three parallel capacitor units 10 is prevented, the electrical and mechanical connection state of the unit wiring member 30 wired to the capacitor unit 10 is stabilized.

  The unit wiring member 30 includes a pair of insulated wires 31 for connecting adjacent capacitor units 10 in series, and a pair of insulated wires for pulling out the positive electrode and the negative electrode of a DC power supply circuit in which three capacitor units 10 are connected in series. 32 and a pair of connecting conductors 33 and 34. The pair of connecting conductors 33 and 34 are band-like metal plates having the same length. The pair of connection conductors 33 and 34 are fixed to the left and right sides of the upper pressing plate 25 in parallel with the upper pressing plate 25 through a plurality of levers 35 and 36, respectively. The connection conductors 33 and 34 are supported by the insulators 35 and 36 in a state where the connection conductors 33 and 34 are slightly lifted from the upper surface 11 a of the three parallel housings 11. The insulators 35 and 36 are used as support members for the connection conductors 33 and 34 and as insulation members for increasing the dielectric strength of the connection conductors 33 and 34 with respect to the upper holding plate 25. By doing so, grooved steel with high mechanical strength can be applied to the upper presser plate 25, and the mounting strength of each capacitor unit 10 to the base 21 is stabilized.

  The pair of insulated wires 31 of the unit wiring member 30 are linear insulated wires with terminal connecting conductors exposed at both ends. Both ends of the corresponding insulated wire 31 are connected to the positive electrode terminal 13 and the negative electrode terminal 14 of the capacitor unit 10 adjacent in the front-rear direction. The other pair of insulated wires 32 are insulated wires bent in an S shape with terminal connecting conductors exposed at both ends. The both ends of the corresponding insulated wire 32 are connected to the positive electrode terminal 13 and the positive connection conductor 33 of the two capacitor units 10 at the front and rear ends of the three in parallel. The pair of insulated wires 31 and 32 are disposed at a position slightly floating from the upper surface 11 a of the three parallel housings 11 and at a position lower than the uppermost end position of the upper presser plate 25. The pair of electrode terminals 13 and 14 includes three front terminals 33a and 34a located on the frontmost housing of the housing 11 arranged in parallel on the front and rear sides, and rear end parts 33b and 34b located on the rearmost housing. Set to the length to be. A plurality of power supply modules 40 housed in the upper and lower multistages in the module housing structure 50 are connected in series using the front end portions 33a and 34a of the pair of electrode terminals 13 and 14.

  The module housing structure 50 shown in FIG. 1 is a vertically long rectangular parallelepiped steel rack having steel columns 52 at four corners. Module shelves 51 are fixed to two columns 52 on both the left and right sides in multiple stages. Four corners of a rectangular lid plate 53 are fixed to the upper ends of the four columns 52. A total of five openings between each of the upper and lower adjacent module shelves 51 and the uppermost module shelf 51 and the cover plate 53 can be inserted and removed in a horizontal direction. It is the storage space S stored in. The opening size and depth size of these five storage spaces S are the same. The width of the storage space S is slightly larger than the width in the left-right direction of the power supply module 40, and the overall height of the storage space S is set to be slightly larger than the overall height of the power supply module 40 by about several centimeters. The depth size of the storage space S is set to be approximately the same as the total length of the single power supply module 40 in the front-rear direction.

  A single power supply module 40 is slid and stored in a single storage space S on a module shelf 51 that forms the bottom of the storage space S. The module housing structure 50 in FIG. 1 has a power supply module 40 entrance / exit formed on the left front surface in FIG. 1, and the power supply module 40 is manually inserted / removed into / from the module shelf 51 only from the front entrance / exit. When the power supply modules 40 are stored individually in the upper and lower five-stage module shelves 51, the power supply modules 40 are connected in series by module wiring members (not shown). An insulated wire or a connection conductor can be applied to the module wiring member. When the power supply modules 40 are stored in the upper and lower five stages only from the front doorway of the module storage structure 50, the front end portions of the power supply modules 40 are lined up and down at the front doorway that is one surface of the module storage structure 50. At the front end portion of the power supply module 40, there are front end portions 33a, 34a of a pair of connection conductors 33, 34, and these front end portions 33a, 34a are arranged in five levels on the front doorway of the module housing structure 50. Therefore, the work of series connection of the upper and lower power supply modules 40 can be easily performed only from the front entrance / exit side of the module housing structure 50.

  The steel rack structure module housing structure 50 shown in FIG. 1 is the one near the final stage of manufacturing and assembly. When the module housing structure 50 accommodates a predetermined number of power supply modules 40 and is connected in series, a decorative plate and doors are attached to the front, rear, left and right four surfaces for quality confirmation.

  Further, the DC power supply device of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

It is a perspective view at the time of the assembly which shows embodiment of the direct-current power supply device which concerns on this invention. (A) is a perspective view of the capacitor unit in the apparatus of FIG. 1, and (B) is an equivalent circuit diagram. It is a perspective view of the base of the capacitor | condenser unit support structure in the apparatus of FIG. FIG. 2 is a perspective view of the capacitor unit support structure in the apparatus shown in FIG. 1 in the first half of assembly. FIG. 3 is a perspective view of the capacitor unit support structure in the latter half of the assembly in the apparatus of FIG. 1. It is a perspective view in the assembly wiring stage of the capacitor unit support structure in the apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 DC power supply device 10 Capacitor unit 11 Housing 12 DC power supply circuit 13 Positive electrode terminal 14 Negative electrode terminal 20 Unit support structure 21 Base 22m Cushion material 22n Cushion material 30 Unit wiring member 31, 32 Insulated wire 33, 34 Connection conductor 35, 36 insulator 40 power supply module 50 module storage structure 51 module shelf S storage space

Claims (8)

  A capacitor unit in which a plurality of capacitors housed in an insulating housing are connected in series and a unit support structure that supports the plurality of capacitor units in parallel, and a power supply module in which the plurality of capacitor units are connected in series, A DC power supply comprising: a module housing structure having a plurality of module shelves in a plurality of upper and lower stages for housing a power supply module in a removable manner.   The housing has a rectangular parallelepiped shape having left and right surfaces, front and rear surfaces, and upper and lower surfaces, and a positive electrode terminal and a negative electrode terminal of a DC power supply circuit configured by connecting the plurality of capacitors in series to the left and right ends of the upper surface of the housing. The DC power supply device according to claim 1, wherein:   The unit support structure includes a base on which the housings of the plurality of capacitor units are arranged in close contact with each other in a row, a front-rear direction orthogonal to the left and right surfaces of the housings on the housings juxtaposed on the base, and A pair of front and rear presser plates and left and right presser plates that are pressed against each other from the left and right directions perpendicular to the front and rear surfaces to position and fix each housing on the base, and each housing pressed against the center of the upper surface of each housing The DC power supply device according to claim 2, further comprising: an upper presser plate that fixes the base plate on the base.   4. The DC power supply device according to claim 3, wherein the base, the front and rear presser plates, the left and right presser plates, and the upper presser plate are pressed against the housing via a cushion material. 5.   The plurality of housings are juxtaposed on the base so that the polarities of the electrode terminals of adjacent housings are different from each other, with the directionality being alternately reversed, and the electrode terminals of the adjacent housings are connected by insulated wires. The DC power supply device according to any one of claims 2 to 4, wherein adjacent capacitor units are connected in series.   A positive electrode lead connection conductor and a negative electrode lead connection conductor are fixedly disposed on the plurality of housings together with the upper presser plate, one on each side of the upper presser plate via insulators, and the positive lead connection conductor 6. The DC power supply device according to claim 5, wherein the connecting conductor for drawing out the negative electrode is connected to a positive electrode end side and a negative electrode end side of a DC power supply circuit configured by connecting the plurality of capacitor units in series.   The plurality of power supply modules housed in each of the plurality of module shelves of the module housing structure are arranged such that the front end portions of the pair of connection conductors are disposed above the foremost capacitor units of the plurality of capacitor units arranged in the front-rear direction. The DC power supply device according to claim 6, wherein the DC power supply devices are connected in series at the front end portions of the pair of connection conductors.   The DC power supply device according to any one of claims 1 to 7, wherein the capacitor is an electric double layer capacitor.

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