This paper presents a new composite soft-switching configuration for single-phase inverters where power bridge leg modules are used. The presented configuration consists of only one inductor and one capacitor as well as two low-power-rated switches/diodes for full-bridge circuits. It can realize snubber functions and/or resonant zero-current switching at any load current for switches in power i...

Domain wall motion during polarization switching in ferroelectric thin films is fundamentally important and poses challenges for both experiments and modeling. We have visualized the switching of a Pb(Zr, Ti)O(3) capacitor using time-resolved x-ray microdiffraction. The structural signatures of switching include a reversal in the sign of the piezoelectric coefficient and a change in the intensi...

Polarization for Au/Pb(Zr Ti )O /YBa Cu O ferroelectric capacitor has been studied and measured by pulse method. A sequence of pulses with amplitudes varying from 0 to 10 volts in 2 volt steps is applied and a conventional polarization curve is obtained by integrating the charge flow from the polarization switching induced by the voltage ramp. A value of 25?C/cm2 is measured for the satur...

Presented in this paper is a low power, area efficient reconfigurable analog-to-digital (ADC) converter, utilising a charge-summation technique with a switched-capacitor implementation. Using a non-inverting switched-capacitor integrator a staircase ramp is produced using switching capacitors and a fixed reference voltage, as opposed to a linear ramp. The advantage of the charge summation techn...

This paper presents an alternate quasi-resonant dc link (QRDCL) circuit for soft switched inverters which does not require paralleling of a charged capacitor with another charged capacitor or a voltage source. The circuit momentarily pulls down the DC link voltage to zero as commandled by the control circuit to facilitate zero voltage switching (ZVS) of inverter devices. Operation of this circu...

Abstract The DSPTMS320F28335, which is utilized as the main control chip, aims to measure system power factor and current voltage, switching capacitor, improve accuracy of capacity capacitor reduce regulation time. hardware circuit designed experimental model built. According results, reactive compensation controller with DSP chip can quickly compensate more than 0.9 even under condition load c...

Switched capacitor filters have been in wide-spread used for a few years, for the realization of stable, accurate and high quality filters for operating frequencies below the megahertz range. This paper would like to prove the feasibility of an integrated and tuned switched capacitor filter with high quality factor of several hundreds for wireless radio frequency applications. The filter was de...

The paper presents some considerations regarding the structure and behaviour of the static var compensator (SVC). Thus, starting from a structure of the compensator it determinates the fundamental impedance of the SVC and it analyses the dependence of the impedance v.s. the components elements (C, R, Lc). Also, it has been realised and the analyses regarding the overvoltages which can appears o...

Thyristor-controlled series capacitor (TCSC) as one of the most important FACT devices can be used for various purposes such as reactive power compensation, voltage control, dynamic stability improvement and power oscillation damping in power systems. Practical aspects on sizing of TCSC elements must be considered to have the fast and reliable switching from capacitor to inductive region and vi...