If balanced three-phase current flow through these three-phase distributed windings,a rotating magnetic field of constant amplitude and speed will be produced in the air gap and will induce current in the rotor circuit to produce torque.

• 如果平衡型三相电流流经这三相分布式绕组，将在气隙中产生振幅及速度稳定的旋转磁场，并会诱发电流在转子回路产生转矩。