JPH0127432Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a power conversion device, and particularly to a power conversion device in which a unit such as a power module has a drawer structure.

[Technical background of the invention and its problems]

A power conversion device is constructed by mounting a plurality of units such as power modules made of thyristors and the like inside a box.

FIG. 1 is a configuration diagram of the inside of a conventional power conversion device viewed from the front. That is, units 3 such as power modules are mounted on upper and lower bases 2 fixed to a box body 1.
are fixed with bolts 4.

In such a conventional power converter, when performing maintenance on units 3 such as power modules, it is necessary to provide a sufficient distance between the units 3 to allow maintenance. A considerable amount of space (about 500 to 600 mm) is required for this maintenance, and the width of the box body 1 is also required to be correspondingly large, resulting in a problem that the entire power converter becomes large.

[Purpose of invention]

It is an object of the present invention to provide a power converter which has a pull-out structure for units such as power modules of the power converter, thereby reducing the conventional maintenance space and reducing the size of the power converter.

[Summary of the idea]

The present invention provides a power conversion device that is made up of a box in which a plurality of units, such as power modules, are shrunk. , a lower base fixed to the lower part of the unit; a guide frame fixed to the upper part of the box body and holding the upper guide roller; and a guide frame fixed to the lower part of the box body and holding the lower guide roller. A sliding material with a low coefficient of friction is provided on the lower base of the unit that comes into contact with the base, so that the unit can be easily pulled out for maintenance and inspection, making it more compact. It is an inexpensive conversion device.

[Example of idea]

FIG. 2 is a front configuration diagram of an embodiment of the power conversion device according to the present invention. That is, a unit 3 such as a power module is placed on a base 12 fixed to a box 11 and fixed by tightening bolts 4. Further, as shown in FIG. 3, an upper guide roller 15A supported by a guide frame 13 fixed to the box body 11 is provided at the upper part of the unit 3 to prevent sideways vibration. Furthermore, a lower guide roller 15B, which is held by the base 12, is provided at the lower part of the unit 3 so that it can be safely pulled out without shifting laterally during maintenance and inspection. Furthermore, since only the target unit is pulled out during maintenance and inspection, maintenance can be carried out satisfactorily without having to provide a large distance between the units 3 as in the conventional case. Therefore, the distance between the units 3 can be set to a short distance determined by the insulation distance.

FIG. 4 is a side view of the power conversion device, and is a diagram for explaining a state in which the unit 3 is pulled out.
That is, the base 12 and the lower base 14A of the unit 3
FIG. 2 is a diagram showing that the unit 3 is moved by a distance L in the direction of the drawer (arrow A) for maintenance and inspection after loosening the bolt 4 tightening the unit 3 and removing it for maintenance and inspection.

In order to facilitate movement of the unit 3 in this manner, a sliding member 14B having a small coefficient of friction is fixedly provided on the lower surface of the lower base 14A. As such a sliding material 14B, for example, Rulon manufactured by Toyo Bearing is commercially available.

[Effect of idea]

As explained above, according to the present invention, since the distance between the units can be reduced, the width of the box body can be reduced, and maintenance and inspection can be easily performed, thereby providing a compact and inexpensive power converter. can do.

[Brief explanation of drawings]

Figure 1 is an internal front view of a conventional power converter, Figure 2 is an internal front view of the power converter of the present invention, and Figure 3 is an internal front view of a conventional power converter.
This figure is an enlarged front view of the upper and lower parts of the unit shown in FIG. 2, and FIG. 4 is a right side view of the unit shown in FIG. 3. 1,11...Box body, 2,12...Base, 3...
...Unit, 4...Bolt, 13...Guide frame, 14A...Lower base, 14B...Sliding material, 15A, 15B...Guide roller.

Claims (1)

[Scope of utility model registration request] In a power conversion device consisting of a box housing a plurality of units such as power modules, an upper guide roller fixed to the upper part of the unit, a lower guide roller fixed to the lower part of the unit,
a lower base fixed to the lower part of the unit;
The guide frame is fixed to the upper part of the box body and holds the upper guide roller, and the base is fixed to the lower part of the box body and holds the lower guide roller and on which the lower base of the unit is placed. A power conversion device characterized in that a sliding material with a low coefficient of friction is provided on the lower base of the unit that comes into contact with the base.