GALVANICALLY SEPERATED CURRENT SENSOR

摘要

The sensor is used in systems of automated electric driving,in automation, electronics, and others. It operates on theprinciple of magnetic compensation by measuring AC, DC and pulsecurrent without any galvanic connection in its circuitry. Itconsists of a Hall sensor (23) and duly connected operationalamplifiers (OAs) (1,2,3 & 4), resistors(5 to 14), adjustableresistors (15 & 16), capacitor (17), transistors (18 & 19), diodes(20) 21) and compensation coil (22). The Hall sensor (23) issupplied across OA (1) and resistor (5). The frequency band ofthe circuit is adjusted by OA (2), and the mass nonequipotetiality- by OA (3). The sensor includes a PI-regulator formed of OA (3),resistors (10 & 11) and capacitor (17).