Direct-current magnetic field induction heating device and system

The utility model relates to the technical field of electric power and electrician equipment, in particular to a direct-current magnetic field induction heating device and system, and aims to solve the problems of high operation and maintenance cost, poor reliability and high energy consumption of superconducting induction heating. The direct-current magnetic field induction heating device provided by the utility model comprises a magnetic conductive iron core, a permanent magnet and an electromagnetic coil, the magnetic conductive iron core is of an annular structure, and the annular structure is provided with a notch to form an air gap. The permanent magnet is connected with the magnetic core to apply a magnetic field to the magnetic core; the electromagnetic coil surrounds the magnetic conductive iron core; after the electromagnetic coil is electrified, a magnetic field consistent with the permanent magnet in direction is generated, and a heated workpiece rotates in the air gap to cut the magnetic field, s