High Energy Absorption Resistors
Zinc oxide utilizes material science technology to connect zinc oxide and silicon carbide in series, achieving automatic current sharing and self-protection. Due to the relatively rigid volt-ampere characteristics of zinc oxide surge arresters, they possess good clamping characteristics. When high-energy zinc oxide resistors are used for demagnetization in generator rotors, they can achieve rapid demagnetization while also providing over-voltage protection. Therefore, zinc oxide demagnetization components are widely used in small and medium-sized power stations and power plants.
**Limitations of Traditional Zinc Oxide Demagnetization Resistors**
Due to the rigid characteristics of the volt-ampere curve of zinc oxide resistors, in a parallel branch of zinc oxide, when the resistance of one branch is relatively low, that branch will bear a larger current compared to the other branches. Additionally, since zinc oxide exhibits negative resistance characteristics, it can easily create a vicious cycle leading to the breakdown and burnout of the zinc oxide in that branch. Therefore, when using zinc oxide resistors for demagnetization alone, it is necessary to connect a relatively large fast-blow fuse in series with each branch, resulting in a larger component size, which limits the application of zinc oxide.