JP2006191763A - Power supply unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply unit capable of facilitating the replacement of a plurality of electric parts for the power supply of the same type at ends of their lives if the power supply unit does not work properly, and capable of eliminating the waste of the replacement of even the electric parts for power supply which have not reached the ends of their lives. <P>SOLUTION: A plurality of the electric parts of the same types of the electric parts for power supply built in a case of the power supply unit are fitted on a single part mounting member at each type. The plurality of part mounting members are connected in such a connection way that each of them may be detachable on a wiring substrate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power supply device that facilitates replacement of electrical components connected to a wiring board.

The power supply device in the control panel generally has a rectifier circuit that rectifies alternating current, and has a role of stably supplying rectified electricity to various electric components in the control panel. For this reason, in the power supply device, electric components such as resistors and capacitors are appropriately arranged on the wiring board to constitute a rectifier circuit.
For example, when an aluminum electrolytic capacitor is used for the power supply device, it is well known that the electrolyte filled inside scatters to the outside and causes a failure. The lifetime of electrical components such as capacitors and fans is 5 to 10 years, which is shorter than the casing and wiring of the power supply unit. To prevent such a failure, replacement specified for each type of electrical component is required. It is usual to replace all such types of electrical components during a periodical inspection, i.e., a periodic inspection before the end of the service life.

By the way, the aluminum electrolytic capacitor is mechanically fixed on the wiring board by soldering and is electrically connected.
The power supply device in which the electrical component is fixed to the wiring board by soldering has a disadvantage that it is poor in workability and takes a long time for replacement because it is necessary to melt and remove the solder when replacing the failed electrical component. is there.

In addition, when a power supply unit that fixes electrical components to the wiring board by soldering fails, when an unskilled worker replaces the failed electrical component, the molten solder is transferred to the surrounding wiring. There is also a problem that the rectifier circuit of the power supply device does not operate normally despite the scattering and replacement of the failed electrical component.
Aluminum electrolytic capacitors with special large screw terminals are mechanically fixed and electrically connected to the wiring on the wiring board by screw connection, but they are expensive and work to replace multiple capacitors It's not easy.

  As means for solving such problems, a single rectifier that rectifies commercial alternating current and a single capacitor that stores the rectified power are combined into a single capacitor block, and each single unit that controls power Switching elements, freewheeling diodes, smoothing reactors, smoothing capacitors, etc. are combined into a single unit switching block, and other circuit components and blocks are connected with a detachable cable to facilitate replacement. A power supply device for a YAG laser has been proposed (Patent Document 1).

Further, as described in Patent Document 2, it is also proposed to use a printed wiring board provided with a spare through hole for press-fit connection, which is a kind of solderless connection method, for mounting replacement parts. .
JP-A-11-163444 JP 2000-151062 A

However, the power supply apparatus proposed in Patent Document 1 is configured as a single unit block by combining different types of electrical components such as a single rectifier and a single capacitor for storing the rectified power.
For this reason, in the power supply apparatus proposed in Patent Document 1, one electrical component constituting one unit, for example, a rectifier, has not reached its lifetime, but when the other capacitor has reached its lifetime, Since it does not operate normally, it must be replaced for each block of one unit, and a rectifier that has not reached its end of life is replaced together with a capacitor that has reached the end of its life, resulting in waste.

In addition, as disclosed in Patent Document 2, a power supply device provided with a spare through hole for press-fit connection in a printed wiring board has one aluminum electrolytic capacitor that has reached the end of its life as a spare through hole. Since it is inserted, when the power supply device does not operate normally, there is a drawback that it is not possible to simultaneously replace a plurality of electric parts of the same type that have reached the end of their life.
The present invention solves the above-mentioned problems of the prior art, and when the power supply device does not operate normally, it is possible to easily replace only a plurality of electric components of the same type that have reached the end of their life, and reach the end of their life. It is an object of the present invention to provide a power supply device that eliminates the wasteful replacement of unused electrical components.

  The present invention is characterized in that, in a power supply apparatus having an electrical component connected to a wiring board, a plurality of the same types of electrical components are attached to a single component mounting member and are detachably connected to the wiring board. It is a power supply device.

  According to the present invention, when the power supply device does not operate normally, the same type that has reached the end of its lifetime among the electrical components built in the housing of the power supply device without performing screw connection release work or solder removal work. It is possible to easily replace a plurality of electrical components together with a single component mounting member, and among electrical components built in the casing of the power supply device, electrical components for power supply that have not reached the end of their life are replaced. Can be eliminated.

  Therefore, according to the present invention, it is possible to easily and economically replace a plurality of electric components of the same type that have reached the end of their service life during regular inspections or when the power supply device does not operate normally.

The configuration of the power supply device according to the embodiment of the present invention will be described below with reference to FIGS.
1 and FIG. 2 are conceptual diagrams, which are different from the arrangement of the electric parts of the power supply device. However, in order to implement the present invention, the same kind of electric parts are formed in a rectangular shape as shown in FIGS. It is advantageous in handling to align with the mounting member 3.
In FIG. 1, reference numeral 1 denotes a casing of the power supply device, and a capacitor 4 and a square pole-shaped resistor 7 are shown as typical electrical components.

  A plurality of component mounting members 3 are electrically connected to the wiring board 2 in the housing 1 of the power supply device according to the embodiment of the present invention. For example, the plurality of capacitors 4 are attached to the capacitor attachment member 3 as shown in FIG. A plurality of resistors 7, which are the same type of electrical component, are also attached to the resistor attachment member 8 and are detachably connected to the wiring board 2. Here, as shown in FIG. 2, the capacitor attachment member 3 is provided with a plug 5 for electrically connecting the capacitor attachment member 3 to the wiring board 2 in a detachable manner. The wiring board 2 is provided with a plug insertion slot 6 that matches the plug 5.

Next, the ease of parts replacement work in the power supply device according to the embodiment of the present invention will be described.
As described above, the power supply device according to the embodiment of the present invention has the same type of electrical components attached to a single mounting member for each type, and a plurality of mounting members that can be detachably attached to the wiring board 2. It is the structure which is electrically connected by. For this reason, during the periodic inspection, a plurality of capacitors 4 of the same type can be easily attached and detached together with the mounting member 3, and one or more of the plurality of capacitors 4 break down, and the power supply device operates. When a defect occurs, the capacitor mounting member 3 including the failed capacitor 4 is removed from the wiring board 2, and a capacitor mounting member to which a plurality of non-failed capacitors 4 are mounted is mounted. Work can be completed.

  As the detachable connection means including the plug 5 and the plug insertion port 6 that matches the plug 5, various connection means such as a receptacle structure can be adopted.

  The present invention was applied to a power supply device used in a hot rolling line work roll speed control device. The power supply device was electrically connected to the wiring board as one electrical component, one fan, two single rectifiers for rectifying commercial AC, and four capacitors. At that time, since there is only one fan, it is not attached to the component mounting member, but is directly connected to the wiring board by a detachable connecting means, and other rectifiers and capacitors that are a plurality of electric components of the same type are: Two each and four each were collected and attached to a single component mounting member, and then connected to a wiring board by means of a receptacle structure.

In such a power supply device according to the embodiment, it is normal that only a short-life capacitor component is replaced and the rectifier is continuously used, but in the present invention, a plurality of capacitors 4 of the same type are attached to the mounting member. 3 can be easily attached and detached together, and on the other hand, it is economically advantageous because the rectifier can be continuously used as it is.
In the above-described embodiment, the combination of the capacitor and the rectifier is exemplified as the electrical component. However, the power supply device of the present invention can freely combine electrical components having various lifetimes as long as the electrical devices of the same type are a plurality of electrical components. Needless to say, you can connect.

It is a perspective view which shows the inside of the housing | casing of the power supply device to which this invention is applied. It is a perspective view which shows notionally how to attach the same kind of several electrical components.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power supply housing 2 Wiring board 3 Capacitor mounting member 4 Capacitor 5 Plug 6 Plug insertion port 7 Resistor 8 Resistor mounting member

Claims (1)

  A power supply apparatus comprising an electrical component connected to a wiring board, wherein the plurality of electrical components of the same type are attached to a single component mounting member and are detachably connected to the wiring board.