the present invention relates to a control system for an engine driven generator , and more specifically , to a control system for controlling the field current to the field coil of the generator to prevent a rapid decrease in the engine rotational speed throughout a transient period when an electric load , such as a head light or an air conditioner , is switched on and begins to draw current . in one embodiment of the invention , the control system comprises digital control means for repeatedly alternating throughout the transient period between calculating an on period and switching the field current on for the on period , and then calculating an off period and switching the field current off for the off period . the digital control means also detects a high output torque operating condition of the engine , and when such a condition is present , switches the field current on throughout the entire transient period . in a second embodiment of the invention , the control system comprises analog or &# 34 ; hard - wired &# 34 ; control means for performing the same functions as the digital control means .