Device for detecting excess-current in a direct-current generator with controlled rectifier
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United States of America Patent
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Jan 26, 1988
Issued Date -
N/A
app pub date -
May 26, 1987
filing date -
Jan 28, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The apparatus relates to an excess-current monitoring device in a direct-current generator having a controlled rectifier, and is particularly useful for electro-chemical machining. A reference signal is generated by a signal generator in accordance with the voltage drive of the rectifier and the mean current supplied to the load. The reference signal is supplied to a comparator which supplies a current-switch-off-signal when the value of the reference signal as compared to the instantaneous load current indicates excess mean load current. This enables optimum machining.
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