Power limiter for electrical contacts
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United States of America Patent
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-
Nov 10, 1987
Grant Date -
N/A
app pub date -
Apr 11, 1985
filing date -
Apr 11, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bias control circuit controlling the power transistor Q2 in a transistor amplifier circuit for supressing the arc formed across the contacts 12, 14, 16 in a glow plug controller 10 for diesel engines. The bias circuit generates a load line for the contacts 12, 14, 16 which has a high voltage, low current portion and a high current, low voltage portion. The arc is formed when the contact 14, which may be slow operating, is required to break a high current, high voltage line.
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