Continuous development of technology determines the search for new solutions in the field of electric machine design with improved electromechanical properties. In recent years, there has been an increased interest in passive and active magnetic gears. This paper presents the design, operation and performance analysis of the modified magnetic gear. The new prototype magnetic gear allows obtaining a ratio of 4:1 or 5:1. For the analyzed construction, two and three-dimensional numerical models are developed for which the series of the magnetic field calculations are carried out . The characteristics of the magnetic torque vs. angle position of the inner rotor with respect to the intermediate ring (modulation ring) and the outer rotor are determined and compared. The examples of flux density distributions for the analyzed converter construction are presented. The calculation results are verified with measurements on the prototype.