Abstract
In this paper, a dynamic model for a magnetic planetary gear drive is proposed. Based on the model, the dynamic equations for the magnetic planetary gear drive are given. From the magnetic meshing forces and torques between the elements for the drive system, the tangent and radial magnetic meshing stiffness is obtained. Using these equations, the natural frequencies and the modes of the magnetic planetary gear drive are investigated. The sensitivity of the natural frequencies to the system parameters is discussed. Results show that the pole pair number and the air gap have obvious effects on the natural frequencies. For the planetary gear number larger than two, the vibrations of the drive system include the torsion mode of the center elements, the translation mode of the center elements, and the planet modes. For the planetary gear number equal to two, the planet mode does not occur, the crown mode and the sun gear mode occur.
Highlights
The magnetic gear drive is without wear and noise, and suitable for the technical fields such as medical apparatus, chemical equipment and food processing equipment, etc. [1]
The mechanism by which magnetic force is generated in the meshing area was elucidated and an experimental meshing model was used to clarify the principle of operation of the magnetic gear [2]
A parallel magnetized spur gear was described by an analytical model and the analytical model was verified with the finite element method [7]
Summary
The magnetic gear drive is without wear and noise, and suitable for the technical fields such as medical apparatus, chemical equipment and food processing equipment, etc. [1]. The influence of the distance between the magnetic gears on the output torque for the drive was investigated [3]. As the driving torque of the magnetic gear drive is relatively small. It limits the application of the drive. Zhu / Natural frequencies and vibrating modes for a magnetic planetary gear drive. The natural frequencies and vibration modes of the magnetic planetary gear drive is yet to be developed. The natural frequencies and vibration modes of the magnetic planetary gear drive is investigated. The authors study the problem in two steps: (1) deduce the dynamic equations for the magnetic planetary gear drive; (2) study the natural frequencies and the modes of the drive system, and the sensitivity of the natural frequencies to the system parameters
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