The extremal and partly marginally trapped surfaces in Minkowski 4-space, which are invariant under the group of boost isometries, are classified. Moreover, it is shown that there do not exist extremal surfaces of this kind with constant Gaussian curvature. A procedure is given in order to construct a partly marginally trapped surface by gluing two marginally trapped surfaces which are invarian...

Space vector control is popular for controlling motor drives or three-phase rectifiers since it offers reduced switching losses and better utilization of the DC bus compared to conventional PWM modulation. This report describes a space vector controller for a three-phase boost-type rectifier that is implemented in PLECS. The schematic diagram of the boost rectifier is shown in Fig. 1. The sourc...

The extremal and partly marginally trapped surfaces in Minkowski 4-space, which are invariant under the group of boost isometries, are classified. Moreover, it is shown that there do not exist extremal surfaces of this kind with constant Gaussian curvature. A procedure is given in order to construct a partly marginally trapped surface by gluing two marginally trapped surfaces which are invarian...

We propose the effective generation of entangled and squeezed states in an optoelectromechanical system comprising a macroscopic $LC$ electrical circuit optomechanical system. notice enhancement optoelectrical entanglement. This boost is obtained by application modulations laser drive amplitude, voltage spring constant movable end mirror. The maximum amount entanglement observed to be primarily...

Abstract: In many power factor correction applications, the power level can reach maximum value and sometimes the input voltage also will be too high. For high power and high voltage applications the inductor volume and weight is the major concern of the conventional boost converter. In this paper the two inductor boost converter is adopted which uses smaller inductors yielding high power densi...

Photovoltaic array exhibits highly nonlinear electrical characteristics and the maximum power point tracking (MPPT) is always challenging. It becomes more complex during partial shading condition. The P-V array characteristics for shading condition have multiple maxima points and conventional MPPT technique fails to track global maximum power point. The operating point may settle at local point...

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract –This paper proposes the controlling of the photovoltaic (PV) system by sliding mode control(SMC). Here, open circuit voltage MPPT technique is used to track maximum power point. There is a difficulty in tracking the maximum power point of the phot...

In this paper presents new topologies Multilevel DC-DC buck-boost converter which consists of an inductor based boost circuit and a switched capacitor circuit has high voltage gain and flexible output voltage. Operation of these switching devices causes inherently nonlinear characteristic to the DC-DC Converters include buck-boost converter. It is suitable for a low voltage power source such as...

converter generally consists of power semiconductor devices which are operate as an electronic switches. Operation of these switching devices causes inherently nonlinear characteristic to the DC-DC Converters include buck-boost converter. Proposed system consists of development of fuzzy logic controller for generating control PWM pulses of required duty cycle for MOSFET of the buck-boost conver...

Homogeneous charge compression ignition technology has exhibited high potential to reduce fuel consumption and NOx emissions over normal spark-ignition engines significantly. Optimized kinetic process technology is implemented to realize homogeneous charge compression ignition combustion in a port fuel injection gasoline engine. The combustion and emission characteristics are investigated with ...