초록 ▼

The problem of providing field power to a stationary main generator rotor is addressed such that it can be used as a synchronous or brushless dc motor. To that end, a dynamoelectric machine performs the dual-functions of an exciter generator and a rotating transformer integrated into a single unit (

The problem of providing field power to a stationary main generator rotor is addressed such that it can be used as a synchronous or brushless dc motor. To that end, a dynamoelectric machine performs the dual-functions of an exciter generator and a rotating transformer integrated into a single unit (14). The heads (64) of the stator salient poles (60) include pole slots (68) for a primary transformer winding (34) for the rotating transformer, while the rotating armature winding (36) serves as the transformer secondary. To assist in starting the engine (10), external ac power (42) is applied to the primary transformer windings (34), coupled to armature windings (36), and rectified (44) to develop dc field power for the main generator (12).

대표청구항 ▼

A dynamoelectric machine comprising: rotor means for rotating about a shaft, said rotor means having armature winding means for providing electric power; and stator means for enclosing said rotor means, said stator means having a plurality of salient pole means for creating an electromagnetic field,

A dynamoelectric machine comprising: rotor means for rotating about a shaft, said rotor means having armature winding means for providing electric power; and stator means for enclosing said rotor means, said stator means having a plurality of salient pole means for creating an electromagnetic field, each of said salient pole means projecting inwardly toward said rotor means, and having a slotted face disposed adjacent to the face of said rotor means, and having a base disposed between said pole face and said stator means, at least one of said pole means having both: (a) a field winding wound about said base for developing power in said armature winding means via generator action when said field winding is energized with direct current at least when said rotor means is rotating; and (b) a polyphase transformer winding wound in said slotted face for coupling polyphase power to said armature winding means via transformer action when said transformer winding is energized with polyphase alternating current at least when said rotor means is not rotating, whereby said armature winding means provides power when said rotor means is and is not rotating.