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The unified dynamical model of DC-DC buck converter is set up, and then two sliding mode controllers are introduced called conventional sliding mode controller and sliding mode proportional integral derivative (PID) controller. The stability are analyzed for the DC-DC converter system controlled by the sliding mode PID, and the optimum sliding mode PID parameters are determined. Finally, the system...
The substrate resistance of 45 nm CMOS devices shows a strong dependence on the distance between the device edge and the substrate contact ring, as well as on the number of sides that the surrounding ring contacts the substrate. We find that the unilateral gain is impacted by the substrate resistance (Rsx) through the gate-body capacitance feedback path at low to medium frequencies (< 20 GHz)....
The sustained oscillation often appears in the induction motor (IM) systems with indirect field-oriented control (IFOC) and essentially caused by the unstable equilibrium points undergoing Hopf bifurcation. In order to stabilize these undesirable oscillations, a convenient time-delayed state feedback method is presented and its accomplishing process is indicated for a tested IM system in detail. It...
An effective Hopf bifurcation criterion is provided for an induction motor (IM) drive system with indirect field oriented control (IFOC). According to the criterion, the bifurcation surface is shown to indicate parameters' influences on Hopf bifurcation set. Research results instruct us how to quench Hopf bifurcation by proper setting of PI parameters. Then, time-delayed state feedback method is introduced...
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