An elementary book on electricity and magnetism and their applications . t generator the current inducedin the armature windings is an alternating current and re-quires a special device, called a commutator, to deliver to theexternal circuit unidirectional or continuous current. There-fore, all we have to do to convert a direct-current generatorinto an alternating-current generator is to omit this rectifyingdevice and to lead the current out by means of collecting short, we substitute the collecting rings for the commutatorin order to convert a d-c. generator into an a-c.
An elementary book on electricity and magnetism and their applications . t generator the current inducedin the armature windings is an alternating current and re-quires a special device, called a commutator, to deliver to theexternal circuit unidirectional or continuous current. There-fore, all we have to do to convert a direct-current generatorinto an alternating-current generator is to omit this rectifyingdevice and to lead the current out by means of collecting short, we substitute the collecting rings for the commutatorin order to convert a d-c. generator into an a-c. , we shall see that the alternating-current generator, oralternator, is a simpler machine to build and to understand thanthe direct- or continuous-current generator. 239. Revolving-field alternator. Since it is the relativemotion between conductors and magnetic flux which generatesthe electric current, we can easily see that it is merely a matterof convenience in construction whether the conductors movethrough a stationary magnetic field (that is, the armature 350. Fig. 236. — Cylindrical form of partly wound revolving field used withsteam turbines. It has 4 poles.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19
