| 主权项 |
1. A synchronous electric machine comprising:
a stator including a plurality of teeth arranged at equal angular intervals and having first and second active surfaces, a first stator winding having a series of first coils wound on said teeth, a second stator winding having a series of second coils wound on said teeth, a first rotor having a series of first permanent magnets arranged at equal angular intervals with alternate polarities and facing said first active surfaces, a second rotor having a series of second permanent magnets arranged at equal angular intervals with alternate polarities and facing said second active surfaces, wherein the first and the second rotors are supported in rotation, independently of each other, around a common axis, wherein the first coils and the second coils of each stator winding are arranged in pairs, with two coils of each pair offset from each other by a predetermined angle, wherein, during operation as a motor, two first coils of each pair produce concordant torque contributions on the first rotor and discordant torque contributions on the second rotor and the two second coils of each pair produce concordant torque contributions on the second rotor and discordant torque contributions on the first rotor. |
