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Three-Phase Circuits

Three-Phase AC Generator Windings

Description

A three-phase AC generator uses rotating magnet windings and a stationary stator to make three-phase voltage. The rotor carries a magnet that spins inside the stator. The stator holds the three-phase winding, and mutual induction creates the voltage.

The stator windings are spread evenly around t...

Transcript

采用带有旋转磁铁且周围环绕静止绕组的三相交流发电机来产生三相电压。

定子包含三个独立的线圈或绕组,其端子相互间隔120度放置。

当转子旋转时,其磁场与线圈相交,从而在线圈中感应出幅值相等、相位差为120度的电压。

每个线圈充当单相发电机,使三相发电机能够同时为单相和三相负载供电。

三相系统通过三根或四根输电线将三个电压源连接至负载。这些电源可以接成星形(Y)或三角形(Δ)连接。

对于幅值和频率相同且相位差为120度的Y型连接电压源,线路a、b、c与中性线之间的电压为相电压,这些相电压是对称的,具有相等的幅值,且彼此之间相位相差120度。

在风力涡轮机中,旋转的叶片带动发电机转子,从而在定子线圈中感应出三...