CN214378039U - Annular ultrahigh-voltage ceramic capacitor chip - Google Patents
Annular ultrahigh-voltage ceramic capacitor chip Download PDFInfo
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- CN214378039U CN214378039U CN202023217362.6U CN202023217362U CN214378039U CN 214378039 U CN214378039 U CN 214378039U CN 202023217362 U CN202023217362 U CN 202023217362U CN 214378039 U CN214378039 U CN 214378039U
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Abstract
A circular ring-shaped ultrahigh-voltage ceramic capacitor chip is characterized in that grooves with circular structures are respectively formed in opposite positions of two ends of the circular ring-shaped ceramic chip; two ends of the outer circumferential surface of the annular ceramic chip extend outwards to form annular convex edges, and the connecting surface of the convex edges and the annular outer circumferential surface is an arc-shaped surface. The ceramic capacitor chip has long creepage distance, improves the voltage resistance and breakdown voltage, and avoids surface flashover.
Description
Technical Field
The invention relates to a ceramic capacitor, in particular to an ultrahigh voltage ceramic capacitor chip with an annular structure.
Background
At present, in the ultrahigh-voltage ceramic capacitor with the annular structure in the market, a ceramic chip is of the annular structure, and the end faces of two ends of the annular structure are planes. Silver layers are coated on the inner peripheral surface of the hollow part of the annular structure and the outer peripheral surface of the annular structure, and are used as two electrodes of the ceramic capacitor and connected with an external circuit through welding leads. And then, pouring an epoxy resin insulating protection layer outside the ceramic chip to form the ceramic capacitor.
Because each ceramic capacitor product needs to be subjected to withstand voltage test in the production process, only products meeting the withstand voltage can be classified as good products. But when the existing product structure is subjected to a piezoelectric pressure test, surface arcing and breakdown phenomena exist in a lightning impulse test, so that the yield is low.
Disclosure of Invention
The invention aims to provide an annular ultrahigh-voltage ceramic capacitor, which is improved in voltage resistance and breakdown voltage, solves the problems of surface arcing and breakdown during compaction test resistance, and improves the yield of a pressure resistance test and a lightning impulse test.
In order to achieve the purpose, the technical scheme provided by the invention is a circular ultrahigh-voltage ceramic capacitor chip which is characterized in that grooves with circular structures are respectively arranged at the opposite positions of two ends of the circular ceramic chip; two ends of the outer peripheral surface of the circular ceramic chip extend outwards to form circular convex edges, and the connecting surface of the convex edges and the outer peripheral surface of the circular structure is an arc-shaped surface.
The width of the arc-shaped groove is 2.5mm-4mm, and the depth is 2mm-4 mm.
The groove is an arc-shaped groove, and an opening of the arc-shaped groove is provided with an arc-shaped guide angle.
The radius of the arc-shaped lead angle is 0.5 mm.
The radius of the arc-shaped surface fillet connected between the convex edge and the peripheral surface of the circular ring-shaped structure is 2 mm.
According to the ceramic capacitor chip with the annular structure, the annular groove is formed in the annular end face, so that the creepage distance between the two electrodes is prolonged, the withstand voltage and the breakdown voltage are improved, the test yield of a product withstand voltage test and a lightning impulse test is improved, and the surface arcing and breakdown phenomena are avoided.
Drawings
FIG. 1 is a schematic side view of the present invention.
FIG. 2 is a schematic top view of the present invention.
Fig. 3 is a schematic cross-sectional structure of the present invention.
Detailed Description
With respect to the above technical solutions, preferred embodiments are described in detail with reference to the drawings. Referring to fig. 1-3, wherein:
the ceramic chip 1 is a hollow annular structure and is generally made of a strontium titanate ceramic material by sintering. Two ends of the ceramic chip are respectively provided with corresponding circular arc grooves 2, the width of the arc groove is 2.5-4mm, and the depth is 2-4 mm. The opening of the arc-shaped groove 2 is provided with an arc-shaped lead angle with the radius of 0.5 mm. The outer peripheral surfaces of two ends of the circular ring-shaped structure extend outwards to be respectively provided with a circle of convex edge 3, the connection surface of the convex edge 3 and the outer peripheral surface of the circular ring-shaped structure is an arc-shaped surface, and the radius of a lead angle of the convex edge is 2 mm. An annular groove 4 is formed on the outer peripheral surface of the annular structure through the two convex edges 3. The surface of the annular recess 4 is coated with a full electrode 41, and the annular inner surface of the annular structure is coated with a full electrode 51, to form two electrodes of the ceramic capacitor, and then, leads (not shown) are welded to the respective electrodes. After the wire bonding is finished, insulating paint is coated on the surface of the ceramic chip to be used as a protective layer. And finally, according to the shape required by a client, epoxy resin is poured outside the ceramic chip to obtain a finished ceramic capacitor.
According to the invention, the creepage distance between the two electrodes is increased by arranging the arc-shaped groove 2 and the increased convex edge 3 between the two electrodes 41 and 51, so that the withstand voltage level is improved, the bad phenomena of arc flashover, surface breakdown and the like are avoided under the high voltage of lightning impulse, and the yield of withstand voltage test is improved.
Claims (5)
1. A circular ring-shaped ultrahigh-voltage ceramic capacitor chip is characterized in that grooves with circular structures are respectively formed in opposite positions of two ends of the circular ring-shaped ceramic chip; two ends of the outer peripheral surface of the circular ceramic chip extend outwards to form circular convex edges, and the connecting surface of the convex edges and the outer peripheral surface of the circular structure is an arc-shaped surface.
2. The annular ultra-high voltage ceramic capacitor chip of claim 1, wherein the grooves have a width of 2.5mm to 4mm and a depth of 2mm to 4 mm.
3. The annular ultrahigh-voltage ceramic capacitor chip of claim 1, wherein the groove is an arc-shaped groove, and an opening of the arc-shaped groove is provided with an arc-shaped lead angle.
4. The annular ultra-high voltage ceramic capacitor chip of claim 3, wherein the radius of the rounded fillet is 0.5 mm.
5. The annular ultra-high voltage ceramic capacitor chip of claim 1, wherein the radius of the leading angle of the arc surface connecting the convex rib and the outer peripheral surface of the annular structure is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023217362.6U CN214378039U (en) | 2020-12-28 | 2020-12-28 | Annular ultrahigh-voltage ceramic capacitor chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023217362.6U CN214378039U (en) | 2020-12-28 | 2020-12-28 | Annular ultrahigh-voltage ceramic capacitor chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214378039U true CN214378039U (en) | 2021-10-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023217362.6U Active CN214378039U (en) | 2020-12-28 | 2020-12-28 | Annular ultrahigh-voltage ceramic capacitor chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214378039U (en) |
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2020
- 2020-12-28 CN CN202023217362.6U patent/CN214378039U/en active Active
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