Subminiature current transformer
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United States of America Patent
Stats
-
Mar 24, 1987
Grant Date -
N/A
app pub date -
Jan 3, 1986
filing date -
Jan 29, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In conventional subminiature current transformers, voltage withstandability property is not reliable and frequency characteristics are inferior. The current transformer of the invention, advantageously, is able to withstand high voltages and also has other advantageous characteristics. A primary coil and a secondary coil are wound about individual bobbins disposed on two L-shaped legs connected together to form a square 'O' shaped core. Compensation for various errors is accomplished by a condenser and a resistor connected between the input and output terminals of an operational amplifier (of the integrated circuit type) which is connected to the output of the secondary coil. The primary and secondary core areas are selectively controlled as to the currents applied to enable the transformer to withstand the high voltages.
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