Magnetic power generation device based on neodymium iron boron permanent magnet

The utility model relates to a neodymium iron boron permanent magnet-based magnetic power generation device, which comprises a permanent magnet, a coil slot, a shell, a coil, a permanent magnet, a bearing, a magnet shell and a fin, the coil slot, a seawater channel and a magnet slot are arranged in the shell, the magnet slot is communicated with the seawater channel, the magnet shell is arranged in the magnet slot, the permanent magnet is arranged in the magnet shell, the magnet shell is in a circular ring shape, and the fin is arranged in the coil slot. Fins are fixedly connected to the outer periphery of the magnet shell, the inner portion of the magnet shell is connected with the shell through a bearing, the magnet shell can rotate in the shell, coil grooves are coaxially formed in the outer portion of the magnet shell, coils are arranged in the coil grooves, and the section of one end of the seawater channel is large and the section of the other end of the seawater channel is small. The device has the adv