3PS465.9---3PS465.9

---在相控整流电路中，若设交流电压和电流基波分量之间的相位角为j，如忽略换流重叠角，在相控角为a时，整流装置的相位移系数cosj与相控角a间有如下关系式：：张亮（工程师）    专线：
24小时移动专线：         【】

                    cosj = cosa

交－交变频器的输出电压既然由各段相控整流电压组成，因此cosj不高，而且cosa越小，cosj也越小。无论输出的负载性质如何，这种相位滞后都不可避免。图1为不同负载功率因数角y和不同电压降系数e时，cosj的变化规律。

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