| 摘要 |
A variable speed generator for producing AC electrical power includes an alternator to generate a first AC current, and a first rectifier which rectifies the first AC current from the alternator; a main exciter having a first field winding which receives the rectified first AC current and a first armature which produces a second AC current in response; a second rectifier which rectifies the second AC current from the first armature; a main generator having a second field winding which receives the rectified second AC current and a second armature which produces an output AC current in response; and a control arrangement for activating a selected pole configuration. The second field winding provides a plurality of selectively activatable pole configurations which differ in the number of their poles, such that the frequency of the output AC current can be varied by switching between the pole configurations. |
