Current Sensor based on Magnetic Sensor using a Variable Bias for Smart Grid

摘要

A magnetic sensor based current sensor using a variable bias power supply for a smart grid is provided. The current sensor according to the embodiment of the present invention, the magnetic sensor for measuring the magnitude of the magnetic field generated by the current, the signal processor for calculating the magnitude of the current from the magnitude of the magnetic field measured by the magnetic sensor and the output scale of the magnetic sensor It includes a controller that variably controls. As a result, the magnetic sensor is driven using a variable bias power supply, so that the sensitivity can be improved without adding an element to the current sensor even in a section in which the current is small in AC.