Stamford AS440 automatic voltage regulator

The Stamford AS440 is a half wave phase controlled thyristor type AVR and is and forms part of the excitation system for a brushless generator. The design employs Surface Mount Technology (SMT) for high integration of features in a small footprint AVR.Positive voltage build up from residual levels is ensured by the use of efficient semiconductors in the power circuitry of the AVR. The power and voltage sensing circuits have separate terminals, allowing the excitation power to be derived directly from the stator winding for basic applications or from an auxiliairy winding if sustained short ciruit performance is required.The AVR is linked with the main stator windings and the exciter field windings to provide closed loop control of the output voltage with load regulatorion of approx.