| 摘要 |
<p>PURPOSE:To minimize higher harmonic components contained in the primary current of the AC converter by so setting the value of reactance of an AC converter winding that the commutation of each converter will be done in the prescribed order when each converter simultaneously starts its commutation. CONSTITUTION:A commutation current of the first converter starts to flow and during this commutation period a change of the commutation current of other converters 14-22 is held almost at zero. At the phasial angle point of the completed commutation of the first converter 12 the commutation current of the second converter 14 starts to flow and during this commutation period the current change of the other converters 16-22 is held almost at zero and at the phasial angle of the point of completed commutation of the second converter 14, the third converter 16 commutation current starts to flow. Likewise each converter commutation is done in turn and at the phasial angle of the finished commutation of the last converter 22 the communication of all converters 16-22 will finish.</p> |
