Outer-Rotor Toroidal-Windings Permanent Magnet Vernier Machine with High-Torque Density
The end length of toroidal windings is notably shorter than that of traditional distributed windings,which contributes to improve the torque density of electric machine.Con-sequently,this paper innovatively introduces a new type of outer-rotor permanent magnet vernier machine with toroidal windings,the design of which effectively shortens the length of end wind-ings through adopting the toroidal windings,and then decreases the overall volume of the ma-chine while retaining a high magnetic field modulation ratio.Furthermore,combining the outer rotor with the toroidal windings significantly increases the torque density of the machine.In or-der to verify the design effect,the finite-element method was adopted to compare and analyze the no-load back electromotive force,output torque,overload performance and other character-istics of the proposed toroidal windings machine with that of the conventional distributed wind-ings machine.Ultimately,a prototype was manufactured and tested,the experimental results has aligned closely with the expectation values.
Toroidal windingsend lengthouter rotortorque density
万方数据
维普
