JPS60192314A - Iron resonance transformer - Google Patents

Abstract

PURPOSE:To prevent deviation of shunt iron core in the direction of plane by vertically providing a pair or more bar type extrusions on an insulates surface covering the end surface of secondary winding with the flat surface and engaging the cut-away part of stacked shunt iron core with such extrusions. CONSTITUTION:Two pairs of extrusions 8 which are vertical to the parallel flat surface are provided to an insulating plate 6 at the end surface of a secondary winding, a cut-away part 9 is provided to the shunt iron core 7 corresponding to the extrusion 8 and respective cut-away parts are engaged with said extrusions. Thereby, deviation in the flat surface of shunt iron core 7 can be prevented. As a result, correction of deviation in the flat surface direction of the shunt iron core 7 is eliminated and an economical iron core resonant transformer having uniform characteristic and high productivity can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates primarily to ferro-resonance used in high-voltage power supplies for copying machines.

Conventional configurations and their problems In recent years, low price competition in the high-voltage power supply industry has become more and more intense, and as a result, the production of ferro-resonant transformers used in high-voltage power supplies has increased significantly.

The conventional 2-2 system as described above with reference to the drawings below. I will explain about the ferro-resonant transformer.

1 and 2 show the configuration of a conventional iron resonant transformer, and FIG. 3 shows an iron core used in the transformer.

In the figure, 1a is the I-type iron that forms the main magnetic path.

1b is on the E type iron forming the main magnetic path, 2 is the primary winding that generates magnetic flux, 3 is the secondary winding that generates secondary voltage by magnetic flux, 4 is the secondary winding 3 on the E type iron Top 1b.

An insulating plate 5 electrically insulating from the shunt core 6 is a shunt core that bypasses the magnetic flux generated by the primary winding 2.

The assembly of the ferro-resonant transformer constructed as described above will be explained below.

First, the secondary winding 3 is assembled into the insulating plate 4, and inserted into the E-type iron top 1b in the direction indicated by the arrow in FIG. Next, the shunt core 6 is press-fit onto the plane of the insulating plate 4 in the direction of the arrow. Then, the primary winding 2 is assembled thereon, and finally the I-type iron core 1a is assembled thereon.

However, in the above assembly method, the shunt core 6
The shunt core 6, which is press-fitted from the direction of arrow entry (3/°), slips in its plane direction, and as a result, the shunt core shifts in the direction of arrow B in Figure 2 (cross-sectional view taken along line XX in Figure 1). This can easily cause the characteristics of the ferro-resonant transformer to become uneven, and correction work is required to make the characteristics uniform.
The disadvantage was that productivity decreased.

Shunt iron core 5 and iron core 1a so as not to press fit too much.

If a space is provided in the fitting portion of 1b, a slight vibration will cause a shift in the direction of arrow B in FIG. 2 after assembly.

As mentioned above, the conventional products were very poor in terms of productivity and characteristics, and were expensive.

Purpose of the Invention In view of the above drawbacks, the present invention eliminates misalignment of the shunt core,
The present invention provides a ferro-resonant transformer with uniform characteristics and improved productivity.

Structure of the Invention In order to achieve this object, the ferro-resonant transformer of the present invention has two
Next, attach the end surface of the winding to an insulating plate that covers the end face of the winding with a flat surface.
The structure is such that a pair or more of protrusions are provided, cuts corresponding to the protrusions are provided in the shunt core, and the cuts in the shunt core are fitted into the columnar protrusions.

With this configuration, the shunt core is fitted with the protrusion of the insulating plate, so there is no deviation in the plane direction, the characteristics are uniform, and no modification work is required, making it a high-performance, low-cost ferro-resonant transformer. can do.

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 4 and 5 show the configuration of an iron resonant transformer in one embodiment of the present invention. 1a is a steel core, 1b is an E-type core, 2 is a primary winding, and 3 is a secondary winding.

6 is an insulating plate having two pairs of protrusions 8 perpendicular to a plane parallel to the end surface of the secondary winding, which is a feature of the present invention; 7 is provided corresponding to the protrusions 8 of the insulating plate 6; This is a shunt core having a notch 9 that fits into the shunt core.

The assembly of a ferro-resonant transformer configured to have a diameter of 5 or more will be explained.

1. Assemble the secondary winding 3 into the insulating plate 6, and install the E-type iron core 1b.
Insert it in the direction of arrow C.

Next, while fitting the notches 9 of the shunt core 7 into the protrusions 8 of the pair of insulating plates 602, each is press-fitted in the direction of arrow C.

The primary winding 2 is assembled thereon, and finally the molded iron core 1a is assembled.

As described above, according to this embodiment, the projections 8 are provided on the insulating plate 6,
By providing the shunt core 7 with notches 9 corresponding to the protrusions 8 and fitting them together, it is possible to prevent the shunt core 7 from shifting in the plane direction. As a result, there is no need to correct the displacement of the shunt core 7 in the planar direction, and an inexpensive ferro-resonant transformer with uniform characteristics and high productivity can be obtained.

In this embodiment, the notch 9 of the shunt core 7 and the protrusion 8 of the insulating plate 6 are prismatic, but they may also be semicircular or triangular as shown in FIGS. 6 and 7. Further, as shown in FIG. 8, a pair of sides of the shunt core may be covered with a cone-shaped protrusion.

Effects of the Invention As described above, the present invention provides at least one pair of columnar protrusions perpendicularly on an insulating plate that covers the end face of the secondary winding with a flat surface, and by fitting the notches of the laminated shunt core into the protrusions. , it is possible to prevent displacement of the shunt core in the planar direction, eliminate the need for correction work for the displacement of the shunt core, have uniform characteristics, and be inexpensive with extremely high productivity.

[Brief explanation of drawings]

Figure 1 is a front view of a conventional ferro-resonant transformer, and Figure 2 is a front view of a conventional iron-resonant transformer.
XX sectional view in the figure, FIG. 3 is a configuration diagram of the iron core used in the ferro-resonant transformer, FIG. 4 is a front view of the ferro-resonant transformer according to an embodiment of the present invention, and FIG. 5 is the main part of the transformer. The exploded perspective view and FIGS. 6 to 8 are exploded perspective views of essential parts of a ferro-resonant transformer in other embodiments of the present invention, respectively. 1a...I type iron core, 1b...E type iron core, 2-...
Primary winding, 3...Secondary winding, 4...Insulation plate, 5-
...Shunt core, 6...Insulating plate, 7...-Shunt 7 -゛iron core, 8-Protrusion, 9...Notch. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure! 13 Kasumi 1α b 4th. am Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] One or more pairs of protrusions are provided perpendicularly to an insulating plate that flatly covers the end face of the secondary winding attached to the iron core, and cuts corresponding to the above protrusions are provided in the shunt core, and the cuts of the shunt core are attached to the above protrusions. A ferro-resonant transformer having a secondary winding fitted to the shunt core and attached to the core adjacent to the shunt core.