船舶电力推进用双馈感应电机的调速范围研究

本文首先根据双馈电机的等效电路推导出转子电流、电压、功率表达式，然后讨论双馈电机在带螺旋桨负载和恒功率负载情况下的转子电流、电压、视在功率与转差率及定子无功功率之间的关系曲线。通过理论计算、仿真分析，得出双馈电机带螺旋桨负载时，在宽调速范围内实现经济调速，需要把双馈电机的同步速定在调速范围的最大值。

The Speed range of Double-fed Motor in Electric Propulsion System of a Ship

This paper gives some discussion about double-fed motor with screw propeller load. Firstly, the expressions of rotor current, voltage and power are derived from T type equivalent circuit.Then, relationship between these expressions and power are analyzed when slip ration is changing with different screw propeller load. Finally, the range of speed adjustment and method are given and it can be proved by simulation that this method can save energy economically when induction motor with screw propeller load is running as a double-fed motor.