The traditional rotary electromechanical converter has the problems of low linearity and small work range of static characteristics.To improve its performance, a novelrotating proportional electromechanical converter is designed.The static characteristics of the rotating proportional electromechanical converter arestudied by means of magnetic circuit analysis, Maxwell 3D static magnetic field finite element analysis and experimental tests. Meanwhile,a prototype isdeveloped and a series of experiments are conducted.Experimentalresults indicate that the proportional electromechanical converter has a working range from -5° to 5°, and the maximum torque is about ±252 mN·m. In addition,it has a positive magnetic stiffness.The experiment and simulation of torque values are concentrated within the 96 mN·m.The relative error is less than 6%, which meansthat electromechanical converter has good repeatability.Furthermore, the nonlinear error of the angletorque curve is less than 15%with a hysteresis of less than 35%,which demonstrates that the currenttorque curve has good linearity and low hysteresis. It proves that the test results are basically consistent with the simulation results.