What is the voltage(Ub)measured when there is no energy in the excitation circuit?, Is the relation between the excitation current(le)increase and generator voltage (Ub) increase linearly? Explain the reason if not. Does the generator voltage increase when the excitation current increases very much? Explain. What is the percentage of the excitation current to its rated value when the generator voltage takes its rated value? How can the excitation circuit be controlled without using the resistance RL? Exp. 4 Devir [[Sahi sabit 3 416 150.6 156.1 160.7 166. Opet risca Uyartm Uu 196 196.1 961 195.9 Ju 0.36 04 0.43 0.46