ABSTRACT
In Chapter 7, we discussed the synchronous machine operating in a variety of environments and configurations, but always in a balanced three-phase mode with sinusoidal excitation, and at constant speed. The machine model presented was quite satisfactory for the applications discussed, and should by all means be used in those situations. But what if one, or more, of these restrictions are violated? For example, suppose we wish to predict machine performance if one of its phases is suddenly opened, or shorted? Suppose we are interested in the dynamic performance of the machine, if it were suddenly decoupled from its load (operating as a motor), or its prime mover (operating as a generator)? How about performance on nonsinusoidal excitation, as would be the case when operated from a PWM drive?
