Rapid thermomagnetic cycle power generation method and system

The invention discloses a rapid thermomagnetic cycle power generation method, which comprises the following steps of: 1) rapidly starting heating a soft magnet to enable the temperature of the soft magnet to reach an overheating phase change temperature; (2) the soft magnet is subjected to phase change at the overheating high-temperature phase change temperature, a magnetic state is changed into a non-magnetic state, the magnetic field intensity in a coil wound around the soft magnet is changed, and current is generated in the coil and power is generated; (3) the magnet is rapidly cooled due to overheating phase change heat absorption of the soft magnet, so that the magnet rapidly reaches the low-temperature phase change temperature, current in the direction opposite to that in the step (2) is generated in the coil, and power is generated; (4) low-temperature phase change heat release of the soft magnet causes rapid heating of the magnet itself, and external auxiliary heating is added, so that the soft magnet