The invention provides a
current sensor based on an auto-bias magnetoelectric
composite material; the
current sensor comprises a support pedestal, a packaging housing, a
mass block and an auto-bias magnetoelectric
composite material; one end of the auto-bias magnetoelectric
composite material is fixedly connected with the support pedestal, and the other end is connected with the
mass block; the auto-bias magnetoelectric composite material comprises a hard magnetic
thin layer, a magnetic induced shrinkage or elongation material layer and a piezoelectric material layer; the hard magnetic
thin layer and the piezoelectric material layer are respectively laminated on the top and bottom surfaces of the magnetic induced shrinkage or elongation material layer; the hard magnetic
thin layer providesa
DC bias magnetic field for the magnetic induced shrinkage or elongation material layer, thus allowing the magnetic induced shrinkage or elongation material layer to make reactions on an annular minimal
magnetic field formed by a current carrying wire under a
zero bias magnetic field, finally enabling the magnetic induced shrinkage or elongation material layer to realize an auto bias magnetic-mechanical-
electric coupling effect. When the auto-bias magnetoelectric composite material senses the annular magnetic field formed by the current carrying wire, electric output can be formed by the auto-bias magnetoelectric
coupling effect, thus finally realizing current sensing.