This paper proposes an AC-DC converter with the application of active type soft switching techniques. Boost converter with active snubber is used to achieve power factor correction. Boost converter main switch uses Zero Voltage Transition switching for turn on and Zero Current Transition switching for turn off. The active snubber auxillary switch uses Zero Current Switching for both turn on and...

This paper presents a novel space-vector based Generalized Discontinuous pulse width modulation (GDPWM) algorithm without angle estimation based on the concept of imaginary switching times. The conventional space vector pulse width modulation (CSVPWM) method with equal division of zero state vectors V0 and V7 is modified. A constantvariable μ and modulation phase angle δ ranging from 0 to 1 are...

This paper presents a novel fuzzy control scheme applied to shunt active power filters for harmonic and reactive power compensation. A TSK type fuzzy logic controller is proposed for APF reference current generation. To control the maximum switching frequency of the converter within limit a novel fuzzy hysteresis band current controller is used. The band height, based on fuzzy control principle...

To meet the requirements of output harmonic distortion neutral point clamped (NPC) three-level inverter under low switching frequency conditions, multi-mode synchronous space vector modulation is usually adopted. When between different pulse patterns, there will be oscillation in current. This paper proposes a smooth method for modulation. compensates phase angle reference voltage vector, order...

Abstract The current study investigates the discursive strategies used by Jewish Israeli women when telling stories of self-empowerment involving interpersonal tension with authority figures. Our corpus is based on in-depth interviews thirty aged fifty to ninety-three from southern city Beer Sheva, Israel. We identified forty-two narratives manifesting tension, mostly Drawing theoretical framew...

VAR support should be supplied as close to the load as possible to minimize transmission losses. For voltage control and for improvement of total power factor in a distribution system the circuit- breaker switched capacitor banks can be used. The problems with this solution are the voltage steps caused by the large sizes of the capacitor banks as well as the transients caused on insertion. Thyr...

We solve the coupled mode equations governing the chalcogenide nonlinear fiber Bragg gratings (FBGs) numerically, and obtain the bistability characteristics. The characteristics of the chalcogenide nonlinear FBGs such as: switching threshold intensity, bistability interval and on-off switching ratio are studied. The effects of FBG length and its third order nonlinear refractive index on FBG cha...

Control systems with switching modes in which different dynamics are assigned are called hybrid dynamical systems and are being actively researched (1–6). The continuous behavior in the hybrid dynamical system is expressed generally by differential or difference equations, while the discrete behavior is described by logics or state machines such as automata. If a system can be regarded as a hyb...