Principle and Design of small Power Claw-Type Bearingless Permanent Magnet Slice Motor

• Published in: 2024 5th International Conference on Mechatronics Technology and Intelligent Manufacturing (ICMTIM) pp. 122 - 125
• Main Authors: Zhen, Jinshuai, Xu, Yanliang, Zhang, Wenjing, Ding, Mingming, Hao, Daqian, Chu, Yang
• Format: Conference Proceeding
• Language: English
• Published: IEEE 26.04.2024
• Subjects: Axial passive levitation force; Blood centrifugal pumps; Claw-type bearingless permanent magnet slice motors; Force; Magnetic cores; Radial active levitation force; Rotors; SMC-Si Combination Stator Cores; Stator cores; Stator windings; Torque; Windings
• DOI: 10.1109/ICMTIM62047.2024.10629429

Aiming at the design requirements of the small power bearingless permanent magnet lamellar motor, firstly, the principle of the motor and the mathematical model of levitation force are introduced, then the stator and rotor are designed based on the theoretical calculations and finite element simulation, and the torque winding and levitation winding are designed with the objectives of torque and levitation force. Combined with the actual engineering heart blood pump medical devices, proposed claw-shaped stator core structure, higher freedom of stator tooth size parameters compared to bearingless slice motors, and it generates more levitation., because the claw-type three-dimensional magnetic circuit structure is more special, in accordance with the actual process processing convenience as well as the cost of the problem, the SMC material has a magnetic and thermal isotropic characteristics, and molding is easy, but the material permeability is low, this paper proposes a SMC-Si combination of the core and the Si core of the two structures, compared with the electromagnetic performance, radial suspension force, suspension force pulsation and other objectives of the motor torque windings and suspension windings. force, levitation force pulsation and other parameters of the output performance, and electromagnetic simulation of axial passive levitation force stiffness, in order to ensure that the rotor can realize stable levitation.