Motor Troubles the Tracing of Direct Current And Alternating Current Motor Trou
Motor Troubles the Tracing of Direct Current And Alternating Current Motor Trou
Edward Brackett Raymond
The book Motor Troubles the Tracing of Direct Current And Alternating Current Motor Trou was written by author Edward Brackett Raymond Here you can read free online of Motor Troubles the Tracing of Direct Current And Alternating Current Motor Trou book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Motor Troubles the Tracing of Direct Current And Alternating Current Motor Trou a good or bad book?
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The contact resistance of copper brushes being only one-tenth that of carbon, is so small that it can be neglected. The driving motor should be of such a size that when driving its alternator at its normal speed and with the maximum field current at which core loss is desired, that it will be loaded only to about half load. This is so that no particular shifting of the brushes on the motor will then be necessary, for it is to keep the core loss of the driving motor constant throughout, so that ...when sub- tracting- the motor input (which includes its own core loss) with field off the alternator, ' from its input with field on the alternator, the core loss of the driving motor being the same in each case will disappear in the calcu- lation. MAKING THE TEST. To this end, the field on the driving motor is kept perfectly constant throughout the core loss test by the ammeter in its circuit, and since the motor is so chosen 142 ALTERNATING-CURRENT GENERATORS. in size that it is but half loaded, the armature reaction has no influence upon the actual field flux of the motor.
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