Low power and proximity AC current sensor

摘要

Disclosed herein is a low-power proximity AC current sensor. A low-power proximity AC current sensor according to the present invention includes a magnetic material (21) having a location that changes depending on the intensity of a magnetic field formed outside the magnetic material; a piezoelectric film (22) disposed at a location adjacent to the magnetic material and configured to generate electric charge due to a change in location of the magnetic material; and a substrate (25) for securing the piezoelectric film. Another low-power proximity AC current sensor according to the present invention includes a magnetic material (71) having a location that changes depending on the intensity of a magnetic field formed outside the magnetic material; corresponding electrodes (72,73) disposed at a location adjacent to the magnetic material and configured to vary capacitance depending on a change in location of the magnetic material; and a substrate (77) for securing the lower electrode (73).