A Study of Contactor Servomechanisms with Positive Hysteresis

A contactor servomechanism is analyzed and constructed. The system is compensated by using positive hysteresis characteristics. It is shown that stability and dynamic, or transient, response are greatly improved by compensation in this manner. From an analytical study, it is shown that this type of compensation can achieve stability in cases where normal phase-lead compensation might fail. As a practical application of positive hysteresis compensation, a laboratory model is constructed and tested. The experimental results verify the analytical study.