CURRENT DETECTOR

PURPOSE:To provide a current detector which can be operated with a single power supply and in which detection accuracy is enhanced and the size of secondary winding coil wound around a troidal core is prevented from increasing while inhibiting over specification of power supply circuit. CONSTITUTION...

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Bibliographic Details
Main Authors OTAKA MICHIHIRO, ARAI YOICHI
Format Patent
LanguageEnglish
Published 02.06.1995
Edition6
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:PURPOSE:To provide a current detector which can be operated with a single power supply and in which detection accuracy is enhanced and the size of secondary winding coil wound around a troidal core is prevented from increasing while inhibiting over specification of power supply circuit. CONSTITUTION:A power supply circuit 15 being fed with power from a vehicle- mounted subbattery power supply Vin produces the power supply V+, V- for a current amplifier 35 and the power supply VHI for a Hall element 43 from the secondary coil of a transformer. Current flowing through the secondary winding coil 59 of a troidal coil 51 is subjected to current-voltage conversion through a detection resistor 61 and then subjected to frequency conversion through a V-F converter 63 to produce a digital signal, i.e., a sensor output So.
Bibliography:Application Number: JP19930288990