Electric Railway Motors: Their Construction, Operation And Maintenance. An ...
Electric Railway Motors: Their Construction, Operation And Maintenance. An ...
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In our eReader you can find the full English version of the book. Read Electric Railway Motors: Their Construction, Operation And Maintenance. An ... Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Electric Railway Motors: Their Construction, Operation And Maintenance. An ...
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This latter can be readily proved by placing an iron bar across the pole pieces of a stationary motor, thus diverting some of the lines of force from the armature. A very noticeable increase of Digitized by CjOOQ IC BEQUIfiEMENTS OF St>E£D BEGULATION. 165 speed of armature will at once occur due to the weakening in this way of the field in which the armature is working.
Thus far we have assumed that the car is run- ning upon a level track or up a uniform grade, or, in other words, that the work... the motors are called upon to perform remains constant.
Of course if the load be increased, more energy- is required to move it at the same speed — a greater torque will be required in the armature, and this may be accomplished by increasing the current in the latter,^ as already stated. The conditions for maintaining uniform speed under increased load, therefore, are obtained by a relatively large increase of armature magnetism over field strength. Thus in a shunt motor operating under constant E.
What to read after Electric Railway Motors: Their Construction, Operation And Maintenance. An ...?
You can find similar books in the "Read Also" column, or choose other free books by Nelson Williiam Perry to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This latter can be readily proved by placing an iron bar across the pole pieces of a stationary motor, thus diverting some of the lines of force from the armature. A very noticeable increase of Digitized by CjOOQ IC BEQUIfiEMENTS OF St>E£D BEGULATION. 165 speed of armature will at once occur due to the weakening in this way of the field in which the armature is working.
Thus far we have assumed that the car is run- ning upon a level track or up a uniform grade, or, in other words, that the work... the motors are called upon to perform remains constant.
Of course if the load be increased, more energy- is required to move it at the same speed — a greater torque will be required in the armature, and this may be accomplished by increasing the current in the latter,^ as already stated. The conditions for maintaining uniform speed under increased load, therefore, are obtained by a relatively large increase of armature magnetism over field strength. Thus in a shunt motor operating under constant E.
What to read after Electric Railway Motors: Their Construction, Operation And Maintenance. An ...?
You can find similar books in the "Read Also" column, or choose other free books by Nelson Williiam Perry to read onlineMoreLess
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