Electric Motors Their Action Control And Application
The book Electric Motors Their Action Control And Application was written by author Francis Bacon Crocker Here you can read free online of Electric Motors Their Action Control And Application book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Electric Motors Their Action Control And Application a good or bad book?
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If all three lamps simultaneously become FIG. 80. CONNECTIONS FOR SYNCHRONIZING THREE-PHASE MOTOR. bright or dark, the connections are correct, and the line switch may be closed at the instant of darkness. It may happen, how- ever, that the lamps do not glow at the same instant but succes- sively. This indicates that the leads are not connected in their proper order. In this case the motor lines should be transposed until the lamps brighten simultaneously. After the machines have SYNCHRONOUS AL...TERNATING-CURRENT MOTOR. 139 been once properly connected their synchronizing can be accom- plished with a single lamp. If the voltage of the circuit is too high for the direct use of lamps, transformers should be inserted as indi- cated in Fig. 81, their secondary coils being in series with each FIG. 8l. CONNECTIONS FOR SYNCHRONIZING ON HIGH-VOLTAGE CIRCUIT. EXCITER USED AS STARTING MOTOR. other and with the lamp /. The latter will glow when the motor e. M. F. Opposes that of the line, provided the connections of either the primary or secondary coils are reversed, the former case being represented in Fig.
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