Linearized Resolver

Resolvers are used in position estimation systems. These electromagnetic sensors, take the benefits of electrical machines. In comparison with encoders, they are robust and more reliable. However, their accuracy is questioned when one of the output voltages is in the peak position. In these situation the other signal is about zero. Therefore, the rate of signal to noise is too low and more susceptible to be affected from environmental disturbances. To overcome this inefficiency, a new winding scheme is suggested in this paper. The proposed winding arrangement that is carried out on a disk type variable reluctance resolver has its own merits: compact size, fault tolerate capability, high accuracy and easy to manufacture. Finite element analysis verify the analytical expressions. Finally, a prototype of proposed resolver is fabricated. Both the finite element analysis and experimental results confirms the excellence of new winding configuration over the custom one.