Characteristics of a diode-bridge-loaded synchronous generator without damper windings

The paper extends the theoretical study of diode-bridge-loaded synchronous generators without damper windings to loads with commutation angles equal to or greater than 60° (modes 2 and 3). The equations necessary to establish the performance in these operating modes, and a simple method of establishing the boundaries between the modes, are given. Constant flux linkages are assumed. Experimental results from tests on a 5 kVA laboratory generator have been used to check the computed theoretical results obtained by using the published equations. A larger, turbogenerator exciter has been used to illustrate the theoretical difference between operation in mode 1 and mode 2.