AC current / voltage conversion circuit

Published:2011/7/5 7:36:00 Author:Lucas | Keyword: AC , current / voltage conversion | From:SeekIC

The circuit uses CT current converter, and the first level of flows the measured current, then the secondary level could get the AC voltage being proportional to the input current. When the measured AC current wire crosses the ring core CT, due to the magnetic field changes generate inducing voltage on the two ends of coil, and the higher current frequency will result higher induced voltage. Low-frequency characteristics of coil depends on the load resistors R1 and RP1, RP2, which are used to adjust the switching sensitivity. If using RP1 and RP2 to do interaction adjustment, it will make the circuit have flat frequency characteristics.



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