A magnet generator can generate electricity by rotating. The size of the electricity depends on the size of the generator. Even if the motor turns to 1000 revolutions, it only has a very small amount of electricity. Large generators are all non magnetic. Magnets are generally used for low-power applications. High power generators use excitation to generate electricity, meaning that the rotor and point wires are connected together. To generate electricity, first transmit a little electricity to the stator while rotating the generator. This way, the rotor coil will cut the weak magnetic field generated by the stator, and the generated electricity will flow into the stator again. This cycle generates electricity. But the generator requires some instruments to stabilize and control the flow of electricity. So there is a control box on top of the generator. If there is no control box to control the electricity transmitted by the rotor to the stator coil, it will cause the voltage and current to increase, which will cause the stator or rotor to heat up and burn out due to being unable to withstand such high current and voltage. For example, the generators in power plants and water conservancy generators generate electricity in this way.

Composition of neodymium iron boron permanent magnet materials

The main raw materials for neodymium iron boron permanent magnets include rare earth metallic neodymium (Nd) 32%, metallic element iron (Fe) 64%, and non-metallic element boron (B) 1% (with small additions of elements such as dysprosium (Dy), terbium (Tb), cobalt (Co), niobium (Nb), gallium (Ga), aluminum (Al), copper (Cu), etc.). Nd-Fe-B ternary system permanent magnetic material is based on Nd2Fe14B compound, and its composition should be similar to the Molecular formula of compound Nd2Fe14B. But when the distribution ratio is completely based on Nd2Fe14B, the magnetic properties of the magnet are very low, or even demagnetized. Only when the content of neodymium and boron in actual magnets is higher than that in Nd2Fe14B compounds can better permanent magnetic performance be achieved.