Alternating current energisation forma adjustable-speed generator

摘要

PURPOSE:To suppress higher harmonic distortion and to obtain a high quality output voltage waveform by selecting the order (k) of higher harmonic field magnetomotive force of a stator slot so that a relation k2-knot equal to 1 is satisfied when the number of slot of rotor is k2. CONSTITUTION:Rotor slots 11 and stator slots 12 are arranged, respectively, in a rotor 7 and a stator 8 with same intervals. Higher harmonic voltage caused by the number of the rotor slot is suppressed by reducing the number of winding coefficient with respect to the spatial higher harmonic of the armature winding. When the number k2 of the stator slot per two poles and the order (k) of the higher harmonic of field magnetomotive force do not satisfy a relation ¦k2-k¦=1 and the winding coefficient of the armature winding with respect to ¦k2-k¦ order spatial higher harmonic is reduced, higher harmonic voltage caused by the number of stator slot and the higher harmonic components of field magnetomotive force can be suppressed.