A detailed user-defined UD auxiliaryfrequency controller AFC model of HVDC has been developed based on Power System Analysis Software Package PSASP.
基于电力系统分析软件包p SASP，使用其用户自定义功能，建立了辅助频率控制模型。
2
Such a motor can not start, we must use another special auxiliary motor winding or so after the arrival of the appropriate frequency before it can be connected to AC.
此种电动机不能自己开动，必须用另一电动机或特殊辅助绕线使到达适当的频率后，始可接通交流电。
3
Based on the actuality that in China's printing industry equipment, the main drive mostly adjusts speed by variable frequency, but less usage in itss auxiliary function.