JPH0711459Y2 - Transformer for generating high voltage - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage generating transformer applied to, for example, an ion generator.

[0002]

2. Description of the Related Art The winding and core of a high voltage generating transformer are
It is electrically insulated via a bobbin which is a form of the winding.

[0003]

However, if there is a gap between the bobbin and the core, when a high voltage is generated in the winding, an air discharge may occur in the gap before the bobbin breaks down. According to this, there is a disadvantage that the insulator that insulates the bobbin is deteriorated and eroded, and dielectric breakdown occurs at a voltage much lower than the true withstand voltage of the insulator itself. More specifically, in a high-voltage generating transformer having such a gap,
For example, 50/6 at 50 / 60Hz / 100VAC input
When a bobbin material made of an insulator with a withstand voltage of 20 kVAC is used for a transformer having an output of 0 Hz and 10 kVAC, it is 10% as specified in the first few months to several years.
Output of kVAC can be obtained. However, after that, there is an inconvenience that the bobbin is broken down by air discharge and the winding is broken.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned inconvenience, and the transformer for high voltage generation according to claim 1 has a conductive layer coated on the surface of the bobbin facing the conductive core. , The conductive layer and the conductive core are in contact with each other. According to a second aspect of the high-voltage generating transformer, the bobbin and the insulative core are coated with conductive layers on opposite surfaces thereof.
The conductive layers are in contact with each other.

[0005]

According to the high-voltage generating transformer of the first and second aspects, the surfaces of the bobbin and the core, which face each other, are in mechanical contact with each other through the conductive layer, and are electrically connected to each other, so Since it is kept at the same potential, even if there is a gap part that does not contact, there is no electric field in that gap, no air discharge can occur, and the true nature of the insulator itself that insulates the bobbin. Dielectric breakdown does not occur at a voltage much lower than the withstand voltage of.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the transformer for high voltage generation is an inner iron type will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a high-voltage generating transformer, which is a rectangular ring-shaped highly magnetically permeable and conductive core 2, for example, an iron core having two legs 2a and 2b and windings 3a and 3b, respectively. The rectangular bobbin-shaped insulating bobbins 4a and 4b are fitted, and the commercial power source 5 is connected to the primary winding 3a on the bobbin 4a side to form the bobbin 4b.
A high voltage is generated between both ends of the secondary winding 3b on the side.

Conductive layers 6a and 6b are formed on the inner surfaces of both bobbins 4a and 4b by means such as painting, plating and vapor deposition, and are highly magnetically permeable and conductive with both conductive layers 6a and 6b. It makes mechanical contact with the surface of the core 2 at least at one point, and becomes electrically conductive.

In this case, the conductive layers 6a and 6b and the surface of the highly magnetically permeable and conductive core 2 are always at the same potential, and the gap G is formed between the bobbins 4a and 4b and the core 2. , There is no electric field in the gap G, no air discharge can occur, and insulation is performed at a voltage much lower than the true breakdown voltage of the insulator itself that insulates both bobbins 4a, 4b. It does not cause destruction.

In the above embodiment, the conductive layers 6a and 6b are brought into point contact with the surface of the core 2 having high magnetic permeability and conductivity, but line contact or surface contact may be used. In the above embodiment, the square annular highly permeable and conductive core 2 is used, but a round annular highly permeable and conductive core 20 may be used as shown in FIG. Although the core 2 having high magnetic permeability and conductivity is used in the above embodiment, a core having high magnetic permeability and insulation, for example, a ferrite core may be used. By means of painting, plating, vapor deposition, etc. on both the inner surface and the surface of the insulating core,
Conductive layers are formed by coating, and the surfaces of both conductive layers are covered with at least 1
It makes mechanical contact at a point to make it electrically conductive. The actions and effects in this case are the same as those in the above-described embodiment, and will be omitted.

In the above embodiment, the transformer for high voltage generation is of the inner iron type, but may be of the outer iron type.

[0011]

As described above, according to the high-voltage generating transformer of the first and second aspects, the surfaces of the bobbin and the core, which face each other, are in mechanical contact with each other through the conductive layer and are in an electrically conductive state. Therefore, the air discharge cannot occur between the bobbin and the core, and it has an effect of eliminating the inconvenience of causing dielectric breakdown at a voltage much lower than the true withstand voltage of the insulator itself that insulates the bobbin.

[Brief description of drawings]

FIG. 1 is an external view showing an example of implementation of the present invention.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is an external view of another embodiment of the present invention.

[Explanation of symbols]

 1 High-voltage generating transformer 2,20 Conductive core 4a, 4b Bobbin 6a, 6b Conductive layer

Claims (2)

[Scope of utility model registration request] 1. A transformer for high voltage generation, which is formed by coating a conductive layer on a surface of a bobbin facing the conductive core, and contacting the conductive layer with the conductive core. 2. A transformer for high voltage generation, comprising a bobbin and an insulative core, the opposite surfaces of which are coated with a conductive layer and the conductive layers are in contact with each other.