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Hybrid electric vehicles are one of the most practicable technologies in the automobile industry to conserve resources and to protect the environment. Mode transitions between different modes are critical to improve fuel economy and driving performances. Due to the response delay of the engine and the engagement of the clutch, smooth transitions are sometimes difficult to achieve. Fuzzy sliding mode...
Horizontal oil-water two-phase flow is widely encountered in power plants, chemical engineering and petroleum industry. Understanding the flow characterization of horizontal oil-water two-phase is significant to uncover the flow mechanics underlying oil-water flow, which will facilitate the safety design and optimization of the process engineering and facilities. Oil-water two-phase flow experiments...
In this paper, we propose a multifunctional active frequency selective surface (MAFSS), which can be switched freely between the electromagnetic switching function and the polarization selection function. Thus, four different working states can be attained by controlling two external bias networks independently. Resonant structures take upon themselves the role of allowing DC currents to pass through...
For the battery/super-capacitor hybrid system as the wireless power transfer system load, it is rarely discussed. In this paper, the characteristics of such a system are considered, a charging topology is proposed. And a control strategy is proposed to not only meet the requirements of the system energy output, but also maintain the high efficiency of the system based on rational design of power allocation...
In the 55nm technology node and beyond of integrated circuits, tungsten is used in contact layer interconnection. Before tungsten deposition, a contact glue layer consist of titanium and titanium nitride (Ti/TiN) is used to enhance adhesion, reduce resistance and prevent tungsten diffusion into the substrate. The growth condition of contact glue layer(s) determines the characteristic of gap fill tungstenfilm,...
This study presents a simple process for producing resistance-based humidity sensors utilizing dopamine (DA) coated gold nano-particles (AuNPs) as the sensing material. Highly hydrophilic bio-molecule of dopamine is physically bonded onto 4–6 nm AuNPs to enhance the humidity sensing performance. Results show that the DA coated AuNPs have nice humidity sensing responses in the measuring range of 20–90%RH...
A new method used in error and VI characteristics measurement of current transformer is developed based on the equivalent model of current transformer. Using this method, the up-flow unit and the standard current transformer are not necessary. And more characteristics of current transformer can be inferred. The current transformer calibrator developed based on this method can carry out rapid and precise...
In order to effectively reduce the hidden trouble of electric window on automobile, many cars now use the electric windows anti-pinch systems. It adds anti-pinch circuit based on the window control module. PIC18F258 micro controller samples and process the current of electric window motor. The method of combining current amplitude and current integral method is used to determine whether the window...
Resistive switching characteristics of Ag/SiO2/Pt memory cells with different set current compliance are studied. Ag/SiO2/Pt cells with low set current compliances show excellent bipolar switching characteristics after forming, including low operation voltage (<;0.5V), low operation current (~1μA), high resistance ratio (104) and good retention characteristic. Co-existence of bipolar and unipolar...
With breakthroughs in battery technology, plug-in hybrid electric vehicles (PHEVs), jointly powered by an electric drive and an internal combustion engine are becoming a realistic alternative. In a PHEV, the battery is charged by the grid and the electric machine plays the major role in the vehicle drive so that the engine is only required to provide extra torque when accelerating and to drive the...
Much attention has been paid to electric vehicles recently due to environmental concerns. The plug-in hybrid electric vehicle (PHEV) consisting of both electricity storage and gasoline tank is welcome to electric vehicle market. In the PHEV system, the electric machine drive is one of the key issues. The ideal tendency is to use the drive machine over the entire torque/speed range with high starting...
This paper investigates the design and analysis of a linear induction motor (LIM) drive for a prototype transportation system, which is levitated by the interaction force between high temperature superconducting (HTS) bulks placed on the ground and permanent magnets (PMs) mounted on the bottom of the vehicle, while the driving force is provided by a linear induction motor system on the side of the...
Several optimal design schemes of a single-sided linear induction motor (SLIM) adopted in linear metro are presented in this paper. Firstly, the equivalent circuit of SLIM fully considering the end effects, half-filled slots, back-iron saturation and skin effect is proposed, based on one-dimensional air-gap magnetic equations. In the circuit, several coefficients including longitudinal end effect...
This paper proposes a practical method to identify the parameters in the train motion model. Focusing on the repeatability of the train motion system, the new method develops an iterative learning identifier to estimate the parameters through repetitive trials. With rigorous analysis, it is shown that each parameter can effectively converge to its actual point after enough iteration. At last, the...
This paper presents the switching characterization of 1200 V, 5 A SiC JFET prototype devices for application in an AC three-phase current-source rectifier (CSR) with a switching frequency of 150 kHz. The result of device on-resistance is shown as a function of junction temperature. Using a simplified gate drive design, the switching characteristics of the SiC JFET are measured experimentally at voltage...
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