✦ LIBER ✦

Influence of capacitor properties on irregular ignition of discharge circuit using a thyristor

✍ Scribed by Keiichi Miyairi; Eiji Itoh; Norimasa Morimitsu; Makoto Ishikawa; Katsuo Hagiwara

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 221 KB
Volume: 137
Category: Article
ISSN: 0424-7760
DOI: 10.1002/eej.1082

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✦ Synopsis

Abstract

A misfire phenomenon taking place in a discharge circuit composed of a capacitor and thyristor has been investigated. This circuit was operated at a frequency of up to 198 Hz. A misfire was observed in a circuit with a PET capacitor at low temperatures, while no misfire was observed with a PP capacitor under any conditions. Transient currents in the range of 40 A to 1 mA were measured with a digital oscilloscope. In the case of a PET capacitor, the current initially decreased exponentially at a given time constant, but exhibited a slow decay which caused the misfire. This current is associated with residual charges trapped in the bulk of the PET film. © 2001 Scripta Technica, Electr Eng Jpn, 137(2): 1–7, 2001

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