Working Characteristics Analysis Of The Cylindrical Permanent Magnet Governor

Permanent magnet governor(PMG) is a new speed control device. The magnetic coupling technology is utilized to realize the speed control. A non-contact, high-efficiency running between the motor and load is achieved. The study of the cylindrical PMG can provide theory basis for optimizing the working characteristics of the PMG.Firstly, the working principle and applications of the PMG are simply introduced in this thesis. The magnetic field distribution and the output torque of the PMG are also analyzed. The research contents include: the structure of the cylindrical PMG is modeled by using the electromagnetic field analysis module of the ANSYS software, and the working magnetic field distribution is solved by the results of changing the size of main structural parameters of the PMG, which can provide a reference for the research of the PMG’s working characteristics; a mathematical modeling of the output torque and eddy-current loss is built in this thesis to analyze the impact of the size of PMG’s main structural parameters to the output torque and the eddy-current loss. The results of the magnetic field analysis by the ANSYS software and the results of the mathematical modeling are compared. The comparisons show that: as the slip speed increases, the output torque firstly increases and then decreases. As the copper conductor thickness increases, the output torque firstly increases and then decreases.According to the simulation of the working magnetic field and the calculation of the output torque, the factors that affect the cylindrical PMG’s working characteristics are discussed. The conclusions provide theory basis for the future industrial manufacture and further study of the PMG.