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In this paper an indirect model predictive current control strategy is proposed. The proposed method simplifies the computational cost while avoiding the use of weighting factors. Weighting factors are an issue for model predictive control in a direct matrix converter due to the large number of available switching states and necessity to control both input and output sides of the converter.
We report, for the first time, a gate last process, used to fabricate Negative Capacitance field effect transistors (NCFETs) with Hf0.5Zr0.5O2 (HZO) as ferroelectric (FE) dielectric in a metal/ferroelectric/insulator/semiconductor (MFIS) configuration. Long channel NCFET's with HZO thickness down to 5 nm exhibit consistent switching behavior with switching slope (SSrev) below kT/q over four decades...
The subthreshold swing (SS) in MOSFETs is limited to 60 mV/dec change in drain current at room temperature by the Boltzmanr distribution of carriers, thus limiting its operating voltage (VD>SS×log Ion/IOFF). Ferroelectric FETs can achieve sub-60 mV/dec by harnessing the negative capacitance (NC) effect in a Ferroelectric (FE) material, thus enabling low voltage operation [1]. Previous works have...
Traditional spin transfer torque MRAM (STT-MRAM) uses one transistor and one MTJ (1T-1MTJ) architecture, where the transistor provides bi-polar currents to switch the magnetization of the free layer of the MTJ. Due to the limitation of the maximum current that is available from a typical transistor, for a MTJ device with required thermal stability and data retention at extreme densities, the size...
Acoustic switches (ASs) can control the wave propagation in media for acoustic wave applications including smart acoustic structures and materials [1]. Especially, contactless magnetic-controlled AS based on magnetoelastic Terfenol-D/epoxy phononic crystals has been developed by exploiting external static magnetic fields [2]. However, the magnetic-controlled AS exhibits an ultra-high threshold of...
Planar wire array Z pinches were carried out on the QiangGuang-I facility (1.3 MA, 100 ns). The effect of prepulse current and insulating coatings on the Z pinch behavior is investigated. Commonly there is a multichannel gas switch filled with 0.5 Mpa dry air between the transmission line and the MITL to cut off the prepulse current. By varying gas pressure filled in the switch, the parameters of...
3-dimensional Multiple-Input Multiple-Output (3D MIMO) systems have received great interest recently because of the spatial diversity advantage and capability for full-dimensional beamforming, making them promising candidates for practical realization of massive MIMO. For 3D MIMO system design, it is important to have full characterization of the 3D MIMO propagation channel, i.e., characterize both...
This paper proposed a novel dc-dc converter to achieve high step-up voltage gain without an extremely high duty ratio. The proposed converter controlled by only a single pulse width modulation (PWM) for the power switch. This thesis is a design of Boost-Forward-Flyback (BFF) converter with high voltage gain. The circuit structure is integrated by Boost, Forward and Flyback.The figuration of the proposed...
In this paper, an integrated EDMOS H-bridge that incorporates both segmented output transistors and segmented gate drivers is presented. This fully segmented design approach allows the output resistance of the H-bridge and the output resistance of the gate drivers to be dynamically adjusted. Dynamic adjustment of these parameters allows for the continuous optimization of the power conversion efficiency...
Important aspects of pulsed power processing that up to now received little attention are opened and summarized. A start is made in dealing with these aspects. They can be summarized as matching power source to process by controlling the global parameters impedance, time distribution, energy distribution and spatial distribution. An application is presented that can help changing the future of the...
Supercritical fluid(SCF), characterized by high pressure and high density, combines the advantage of gas and liquid: high ability of mass transfer (dense, high diffusivity and low viscosity) and high heat transfer (high heat conductivity). Research on discharge behavior of SCF in high electrical field are more recent and less common, and are also motivated by new environmental and economical reasons...
This paper presents a residential energy and power conservation system that utilizes an optimization model and user side controller. The aim of this paper is to enforce a reduction in the users' current level of consumption and yet minimize any discomfort as the result. An energy usage optimization model is the foundation of this work. It computes a set of directives for a specific user based on the...
This paper defines and evaluates a model predictive control strategy with binary integer programming optimization for load shifting in a water pumping scheme. Both time-of-use and maximum demand charges are considered in the control model. The control model yields near optimal switching times which reduce time-of-use and maximum demand based electricity costs. Both the time-of-use and maximum demand...
This paper proposes a filtering method to filter out impulses in the position error signal (PES) due to corrupt servo pattern or demodulation timing in hard disk drives. The impulse disturbance, leading to a sudden change in PES; may be distributed separately or consecutively. A nonlinear switched filtering method is used to smooth the PES before feeding into servo controller. With the nonlinear switched...
It is well known that air density and humidity have significant effects on the flashover strength of insulators and air gaps. IEEE Standard 4-1995 and IEC Standard 60060-1 both call for the application of correction factors to ac, switching-surge, and lightning-surge flashover levels in laboratory testing. However, atmospheric conditions vary over a wide range at different times and locations, which...
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