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The power/signal synchronous transmission between converters has attracted much attention since no extra independent signal transmitting equipment is required. In this paper, bifurcation behaviors of a cascaded two-stage Buck-Boost converter are discussed by simplifying the second stage boost converter as constant power load. The amplitude variation of the bus voltage caused by bifurcation is used...
The paper presents an original concept for interfacing of tensoresistive and capacitive force sensors with applications in modern microelectronics systems. In the first part, the authors show the results and conclusions of a PSPICE simulation for an original patented circuit. The used simulations models were introduced in some circuit components corresponding to the realistic behavior implementation...
Application of static synchronous series compensator (SSSC) based damping controller for enhancement of power system stability is throughout investigated in this paper. SSSC is effectively utilized for power flow control in the power system. A SSSC-based damping controller is proposed for rotor angle stability enhancement and to eliminate the power oscillation damping in power system. To improve the...
Wind technology is one of the fastest developing renewable technologies. Squirrel cage induction generator (SCIG) with back to back fully rated converter used for wind energy conversion systems (WECS) is a meritorious option among its class. SCIG's offer advantages of being robust, suitable for any harsh environment, cheaply available and unsophisticated than the other types available. To enable increased...
A lower power consumption, smaller output ripple and better regulation current-mode CMOS buck power converter with a novel on-chip slope compensation circuits for feedback control is presented in this paper. In current-mode converters, the slope compensation circuits needs to add ramp voltage signal with the inductor current signal in order to avoid subharmonic oscillation. The converter is designed...
The pulse-train (PT) control technique for switching dc–dc converters is simple to design and benefits from excellent control performance. Up to now, almost all of the works on PT control are focused on switching dc–dc converters operating in discontinuous conduction mode, with few works reported on PT control of switching dc–dc converters operating in continuous conduction mode (CCM). In this paper,...
This paper proposed a novel multi-objective predictive direct power control (P-DPC) approach to achieve three different control targets dependent on the operation of the network: eliminating negative sequence currents, eliminating active power oscillation and eliminating reactive power oscillation. The proposed P-DPC strategy decouples positive and negative sequence components in the stationary reference...
This paper demonstrates a CMOS Ring Voltage Controlled Oscillator (RVCO) whose oscillation frequency is insensitive to supply noise. Our RVCO achieves this with on-chip adaptive bias-current and voltage-swing control. A prototype RVCO is fabricated with 0.13um CMOS technology and it achieves static supply voltage sensitivity of 0.013%-fvco/1%-Vdd and dynamic sensitivity of 0.08%-fvco/1%-Vdd.
By controlling the Static Var Compensator SVC equivalent susceptance could control bus voltage in the steady-state operation and damp power oscillation in dynamic process of the system. But to achieve the two effects have certain constraints. In this paper, based on the design of the main control model of voltage control, through the two auxiliary control signals input the main control, voltage and...
A new energy-saving scheme of voltage-regulation control for induction motors at periodically varying loads with almost constant speed is presented in this paper. The energy-saving principle, control strategies, triggering mode of SCRs are studied. Based on the analysis of the current oscillation in the voltage-regulation by 3-phase thyristors with the synchronous voltage signal, the solution to current...
For PWM DC-DC converters, keeping the output voltage steady is very important. When the input voltage has a step change, up impulse or down impulse voltage will occur in the output. Both the magnitude and the duration time of the over voltage are severely influencing to the whole system, which will destroy or disorder the circuit. Step-down converter is used as an example to investigate the input...
A delay-locked loop of multi-band selector with wide-locking range and low power dissipation is presented. The architecture of the proposed delay-locked loop consists of phase frequency detector, charge pump, band selector, multi-control delay line, and start-up circuit. The multi-band selector is used to extend operation frequency of delay-locked loop by switching the multi-control delay line. The...
Plasma-exposed Si surface related to Si recess in source/drain region was investigated in detail for various superposed bias configurations with frequencies of 13.56 MHz and 400 kHz. Two different bias powers were utilized by an inductively coupled plasma reactor (ICP). The surface layer (SL) and the interfacial layer between the SL and Si substrate (IL) were analyzed by spectroscopic ellipsometry...
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