Abstract
Based on the magnetic field modulation effect, this article presents a magnetic gear with intersecting axes and straight stationary pole-pieces. Except for a higher utilization of permanent magnets and a greater output torque, the magnetic gear with intersecting axes and straight stationary pole-pieces provides several advantages, such as a smaller volume, higher torque density, and lower processing cost. The magnetic gear with intersecting axes and straight stationary pole-piece topology is herein introduced and the deduced constraints of the structural design are outlined. The transmission mechanism is demonstrated by analyzing the output torque in the middle of the air gaps. The effects of the main design parameters on the maximum static torque are evaluated using the finite element method. Based on the orthogonal experimental design and the response surface method, the optimum design results are provided. Prototype of the magnetic gear with intersecting axes and straight stationary pole-pieces has been realized and the static torque has been verified experimentally.
Highlights
Magnetic bevel gears (MBGs) have several advantages, such as no contact, no wear, no lubrication, low vibration and noise, and overload protection.[1]. They have received considerable attention since the 1980s as an alternative to mechanical bevel gears. They have few pairs of teeth to engage in the meshing on account of their adoption of the mechanical bevel gear topology
In the response surface method, the agreement of the approximate model with the experimental samples usually is measured by the multiple correlation coefficient R2
The intersection angle between the input and output rotors can be changed by adjusting the radial section parameters of the stationary polepieces (SP)
Summary
Magnetic bevel gears (MBGs) have several advantages, such as no contact, no wear, no lubrication, low vibration and noise, and overload protection.[1]. It is composed of the input and output rotors and the SP. The influence parameters are (1) the axial thicknesses of the PMs on the input and output rotors are equal and synchronously change. When the thickness of the back irons hb is thin and increase, the maximum static torque increases quickly and the volume of the MGIASSP system increases relatively slowly.
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