In a synchronous machine, cylindrical pole construction has been found to suit best for ___________ ?
A. low speed prime movers
B. high speed prime movers
C. medium speed prime movers
D. any of the mentioned
Answer:A
In a synchronous machine, cylindrical pole construction has been found to suit best for ___________ ?
A. low speed prime movers B. high speed prime movers C. medium speed prime movers D. any of the mentioned
Explanation: For high speed prime movers, if salient pole construction is used, the rotor structure may not be able to withstand the enormous centrifugal forces, developed by the salient poles. Therefore, cylindrical rotor construction is best suited from mechanical considerations. 3. Commercially, which of the following generators is called turbo-alternators or turbo-generators?