Torque sensitivity analysis for triple‐speed coaxial magnetic gear using finite element method

Abstract

Abstract The authors introduce a new type of triple‐speed coaxial magnetic gear (TSCMG) and analyses its operation with sensitivity analysis. The effect of various factors is evaluated on TSCMG performance, including the yoke thickness, permanent magnet (PM) thickness, number of pole pairs (gear ratios), axial length, pole‐arc coefficient, PMs and air gap length. At first, a preliminary design of TSCMG is made, and then its optimal parameters are selected using sensitivity analysis based on the finite element method (FEM). Then, TSCMG is simulated by applying both preliminary and optimal design parameters. The flux density distribution and rotor torque within TSCMG are extracted. Analysis results show that TSCMG can offer higher pull‐out torque and lower maximum flux density at the edges and corners of TSCMG. Finally, the performance of the designed TSCMG is validated with a prototype.