High-torque low-speed electric motor with a rolling rotor, as an alternative to existing gear motors

Abstract

Purpose. Getting the dependence of three-tooth motor with a rolling rotor (MRR) torque value from the active length of its rotor by the calculation of magnetic field distribution in four different construction of the MRR. Methodology. Modeling of electro-magnetic processes in ANSYS Maxwell 3D solution, which appeared in MRR with different type of construction and properties of its material. Results. The results of numerical and field calculation in the ANSYS Maxwell program of four design versions differing via the length of the rotor core active parts and the materials of the stator are presented. The distributions of the magnetic induction in the air gap were obtained, as well as the value of the torque for each MRR design. Also as a result we made the conclusions, that rotor with a half-length of the rotor has a best result of the torque value and less size of its main parts. Originality. MRR is a non-standard machine in which the rotor rolls over the stator surface with guaranteed eccentricity. Practical value. A 3D model of a high-torque low-speed MRR with an axial magnetic flux are presented, and the results of its modeling calculation and experimental researches are shown for various type of its construction with different size and material properties.