By September 1887 Tesla discovered that he could produce a rotating magnetic field by feeding two separate alternating currents into pairs of coils set on opposite sides of the stator [see illustration on page 80].
By September 1887 Tesla discovered that he could produce a rotating magnetic field by feeding two separate alternating currents into pairs of coils set on opposite sides of the stator [see illustration on page 80].
到了1887年，特士拉发现，他可以将两道分开的交流电导入附在定子两侧的一对线圈，产生转动的磁场（见100页插图）。