A new structure of dual channel of coarse and fine coupling structure of reluctance resolver was put forward based on the magnetic analysis. Meanwhile, the paper also gave us the possibility to decouple the coarse-exact channel EMF signals of the same magnetic circuit and points out that the structure of dual channel rotary transformer can be coarse and fine signal decoupling principle of possibility. At the same time, the magnetic field finite element method was used to calculate the decoupling effect and ...