US 4,814,938 AGranted

High voltage capacitor

AssigneeMurata Manufacturing Co., Ltd.

InventorsHajime Arakawa, Osamu Yamaoka, Shinichi Kobayashi, Kunio Okumura, Kanichi Morishita

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Abstract

A high voltage capacitor used for a low-pass filter circuit or the like in a magnetron oscillator circuit of an electronic cooking range includes in combination, a capacitor unit, a ground terminal into which the unit is inserted, two perforating conductors inserted through two through-bores extending in the capacitor unit, insulating casings encircling the capacitor unit on both sides of the ground terminal, insulating resin disposed in both of the insulating casings and surrounding the capacitor unit, an electrode at the outer periphery of the capacitor unit, and electrodes at the inner periphery of each through-bore which surround and are conductively coupled to each perforating conductor. When compared to a conventional high voltage capacitor, the present invention has a reduced number of components, is simple in construction, and is not subject to a lowering of the breakdown voltage durability caused by a heat cycle or the like.

Claims8

Dependent claims

A high voltage capacitor comprising:

a capacitor unit including a dielectric, said dielectric having a pair of opposite end surfaces, a peripheral side surface extending between said end surfaces, and two through-bores extending therethrough between and open to said opposite end surfaces,
a respective inner electrode disposed in each of said through-bores and extending over a respective inner peripheral surface of said dielectric that defines each of said through-bores, and
an outer electrode extending over the outer peripheral surface of said dielectric;
a ground terminal having a through-bore extending therethrough and in which said capacitor unit is disposed, an inner peripheral edge of said ground terminal extending over and conductively coupled to said outer electrode;
a perforating conductor extending in each of said through-bores and electrically conductively coupled to the inner electrode disposed therein;
tubular insulating casings encircling said capacitor unit on opposite sides of said ground terminal, respectively;
and
insulating resin disposed within each of said tubular casings, said insulating resin covering said capacitor unit.

5 more elements

Dependencies are inferred from the claim text.