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Analog continuous current controller
System structure for implementing
Discontinuous current operating points
6 other sections not shown
adaptive controller program analog portion analog-to-digital converter armature current becomes assembly language program Bode plot calculated circuits simulation program clock interrupt routine compute continuous current controller continuous current operation current becomes zero current loop current operating points DC gain delay determined digital controller discontinuous current operation driven DC motor DTIME Equation 4-l5 Figure l2 FIRES SCR firing angle firing circuits simulation firing pulses Fortran program given in Equation implemented input instantaneous armature current integer KWLI line clock interrupt line-to-line voltage linear approximation load torque loop transfer function microseconds motor speed natural commutation Nieniewski l3 obtained output voltage overshoot phase margin point of natural pointer radians per second radix point region region of discontinuous SCR converter SCR driven DC SCR is fired shown in Figure slope step response stored SUBROUTINE tion transportation lag value of K2 VOFD WOFD WOPD