Annular transformer type brushless resolver sensor

An annular transformer type brushless resolver sensor solves the problems of low angle measurement precision, insufficient stability and poor applicability in the prior art. The rotary transformer comprises a common rotary transformer body and is characterized in that the common rotary transformer body is composed of a first common rotary transformer coil set and a second common rotary transformercoil set, and a common rotary transformer middle shaft is arranged between the first common rotary transformer coil set and the second common rotary transformer coil set; an annular transformer is arranged on one side of a common rotary transformer, the annular transformer is composed of an annular transformer jacket, an annular transformer coil is arranged in the annular transformer jacket, andan annular transformer magnetic core is arranged in the annular transformer coil; and a measuring lead is arranged at the joint of the annular transformer and the common rotary transformer. The deviceis reasonable in design, c