STABILITY ANALYSIS OF SLIP ENERGY RECOVERY DRIVE

Abstract

Steady state and stability analysis of a constant power type slip energy recovery drive is presented in this work. The system equations are written in s'mchronously•rotating reference frame. Complete performance under steady state is investigated_. For stability study a set of non-linear differential equations describing the dynamics of the system is linearized about an operating point using small displacement theory. Using the characteristic equation of the linearized model and Routh Hurwitz criterion, instability regions in the torque slip plane have been established from the results of a digital computer study. Two subroutines for steady state analysis and stability analysis respectively have been deve-loped.. The latter directly gives the instability contour data to be plotted on CALCO plotter or to give a visual presentation on TEKTRONICS graphic terminal. Effects of various parameters of the system upon the instability region h atw been investigated and conclusions drawn. 11