DC Generators The purpose of providing dummy coils in a generator is To enhance flux density To amplify voltage To reduce eddy current losses To provide mechanical balance for the rotor To enhance flux density To amplify voltage To reduce eddy current losses To provide mechanical balance for the rotor ANSWER DOWNLOAD EXAMIANS APP
DC Generators Number of tapings for each equalizer ring is equal to Number of pole pairs Number of parallel paths Number of commutator segments Number of poles Number of pole pairs Number of parallel paths Number of commutator segments Number of poles ANSWER DOWNLOAD EXAMIANS APP
DC Generators The insulating material used between the commutator segments is normally Graphite Mica Paper Insulating varnish Graphite Mica Paper Insulating varnish ANSWER DOWNLOAD EXAMIANS APP
DC Generators A 4-pole , lap wound dc shunt generator has an armature winding consisting of 220 turns each of 0.004 Ω. The armature resistance is 0.055 Ω 0.5 Ω 0.025 Ω 1 Ω 0.055 Ω 0.5 Ω 0.025 Ω 1 Ω ANSWER DOWNLOAD EXAMIANS APP
DC Generators When two D.C. generators are running in parallel an equalizer bar is used So that the two identical machines will pass approximately equal currents to the load To reduce the combined effect of armature reaction of both the machines To increase the series flux To increase the generated e.m.f. So that the two identical machines will pass approximately equal currents to the load To reduce the combined effect of armature reaction of both the machines To increase the series flux To increase the generated e.m.f. ANSWER DOWNLOAD EXAMIANS APP
DC Generators A separately excited generator as compared to a self-excited generator Has exciting current independent of load current Has all above features Is more stable Is amenable to better voltage control Has exciting current independent of load current Has all above features Is more stable Is amenable to better voltage control ANSWER DOWNLOAD EXAMIANS APP
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