Implementation of a high accuracy ac current sensing scheme using hall-sensor

摘要

The paper represents an accurate and economic low range (up to 5 A) ac current sensing scheme using high precision ACS712 hall-sensor. ATmega microcontroller is used in processing signal and for data-acquisition from the hall-sensor output in order to make the system self-dependency. The reproducibility of the developed system is increased due to high speed operation and wide temperature-tolerance range of ACS712 hall-sensor. A proto-type of current sensing system is designed to sense up to 5 A (ac) with a precision of 0.01 A and resolution of 10 bit. Simulation and experimental validations are included to defend performance of the design with regard to high quality current sensing ability.