Synchronizing Current

Author: E.E. Kimberly

After the synchronizing switch in Fig. 20-8 has been closed at the proper instant, the drifting of alternator (a) does not instantly cease but continues until the resultant voltages E₁aE₁bj E₂aEzb, and E₃aE₃b become large enough to enable the motorizing current circulating between the alternators to hold them exactly in synchronism. This current is called synchronizing current. If the prime mover driving alternator (a) were then disconnected, the synchronizing current would rise just enough to drive machine (a) as a synchronous motor.