Principles of Alternating Current Machinery
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In our eReader you can find the full English version of the book. Read Principles of Alternating Current Machinery 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 Principles of Alternating Current Machinery
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Since low resist- ance is desirable, it is best to solder the short-circuiting end rings to the bars even if they are also bolted. The inductors of most squirrel-cage rotors are now electrically welded to the end rings. One type of squirrel-cage rotor is indicated in Fig. 221.
1 Page 35, Synchronous Generators.
470 PRINCIPLES OF ALTERNATING-CURRENT MACHINERY Advantages and Disadvantages of the Two Types of Rotor.
The chief advantage possessed by the coil-wound rotor is the possibility it offers... of having its apparent resistance varied by inserting resistances between its slip rings. This variation in resistance may be used to increase the starting torque or to vary the speed. The chief disadvantages of this type of rotor are its higher cost, slightly higher resistance 1 and less ruggedness FIG. 221.
than the squirrel-cage type. Squirrel-cage rotors are extremely rugged and have very low resistances. Consequently, they de- velop low starting torque but have good speed regulation. The starting current taken by a motor having a squirrel-cage rotor is large and the power factor at starting is low.
What to read after Principles of Alternating Current Machinery?
You can find similar books in the "Read Also" column, or choose other free books by Ralph Restieaux Lawrence to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Since low resist- ance is desirable, it is best to solder the short-circuiting end rings to the bars even if they are also bolted. The inductors of most squirrel-cage rotors are now electrically welded to the end rings. One type of squirrel-cage rotor is indicated in Fig. 221.
1 Page 35, Synchronous Generators.
470 PRINCIPLES OF ALTERNATING-CURRENT MACHINERY Advantages and Disadvantages of the Two Types of Rotor.
The chief advantage possessed by the coil-wound rotor is the possibility it offers... of having its apparent resistance varied by inserting resistances between its slip rings. This variation in resistance may be used to increase the starting torque or to vary the speed. The chief disadvantages of this type of rotor are its higher cost, slightly higher resistance 1 and less ruggedness FIG. 221.
than the squirrel-cage type. Squirrel-cage rotors are extremely rugged and have very low resistances. Consequently, they de- velop low starting torque but have good speed regulation. The starting current taken by a motor having a squirrel-cage rotor is large and the power factor at starting is low.
What to read after Principles of Alternating Current Machinery?
You can find similar books in the "Read Also" column, or choose other free books by Ralph Restieaux Lawrence to read onlineMoreLess
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