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Electric traction can be considered as one of the promising technologies towards significant improvements in performance & efficiency of vehicle, energy utilization and polluting emissions. The induction machine (IM) is usually selected as work horse of traction industry because of its most suitable torque-speed characteristics. In the present context the regenerative braking is considered to...
In recent times, along with the growth of the solar energy extractions, the grid connected solar inverters are gaining more popularity. The huge deployment of solar inverters may reduce the power quality of utility grid, if they deployed without proper power quality measures. As per the IEEE 1547 standards, the current total harmonic distortion (THD) should not be more that 3 % at the point of common...
This paper presents design and modelling of single stage standalone PV based PMSM (Permanent Magnet Synchronous Motor) drive. Standalone power supply system is more feasible and convenient option for water pumping applications in irrigation. Three phase DTC (Direct Torque Control) VSI (Voltage Source Inverter) is presented for supplying the PMSM for variation in solar irradiation to control the flow...
This paper presents a power-hardware-in-the-loop (PHiL) grid emulator (GE) which is based on switch-mode voltage source inverters (VSI) with the magnetic coupling. The grid emulator is controlled to reproduce the typical grid fault behaviors (under-voltage, interruption, frequency variation, fault-ride-through etc.) for the equipment under test (EUT). In past several different commercial grid emulators...
We demonstrate that sub-harmonic injection locked oscillators (SHILOs) can serve as building blocks of neural networks. After numerically studying the locking properties of injection-locked ring-oscillator models, we show that resistively or capacitively interconnected networks of such oscillators fall into well-defined ground states, which ground states, in turn, depend on the strength of interconnections...
Air-core inductive charging systems offer significant weight, cost and reliability advantages over competing ferrite based solutions at the expense of reduced coupling factor. Acceptable magnetic link efficiencies (>95%) can nonetheless be achieved by operating at MHz frequencies where the coil Q is inherently very high (>1000). We present a design approach for transmit-side power electronics...
This paper proposes a single-bit ADC system based Proportional and Integral (PI) controller to regulate the output voltage of Capacitive Power Transfer (CPT) systems. A simple single-bit ADC system i.e., Single-Bit Modulator (SBM) is considered as an alternative to the commonly used multi-bit ADC systems. Unique features of employing SBM are 1) its ability to convert analog signals into single-bit...
Inductive power transfer (IPT) systems are often designed to achieve their highest efficiency at a fixed load value and at a fixed coil separation distance and misalignment. A variation in the position of the coils or the load value tends to drastically affect the efficiency, and therefore makes the designed IPT system not practical for applications that are mobile with variable loading conditions...
Inductive Power Transfer (IPT) is the most available method to transfer the power wireless by loose coupling. Various IPT systems for electric vehicles are either under development or deployed as aftermarket options in the automotive industry. In this work, a series-series compensated inductive power transfer system for electric vehicles is presented and investigated, which allows a power transmission...
We demonstrate that FDSOI transistors co-integrated with a diode implemented below the buried oxide (BOX) become strongly sensitive to visible light. The carriers photogenerated in the diode create a Light-Induced Vt Shift (LIVS) in both NFET & PFET transistors by means of capacitive coupling, without direct electrical connection between the photodiode and the sensing transistor. This optical...
The feasibility of flipflop designs for storing hexadecimal datum is studied in this work. Hexadecimal signal processing appears the benefit on the great reduction of interconnections, which leads to the potential of improving various performances. However, the storage of hexadecimal datum is very challenging for the conventional binary implementations. In this paper, a prototype of hexadecimal flipflop...
This paper presented the design of a capacitive power transfer (CPT) system by implementing a Class-E inverter due to its high efficiency, which in theory can reach close to 100% performance. However, the Class-E inverter is highly sensitive to its circuit parameters under the scenario of having small capacitance at the coupling plate. As a solution, an additional capacitor can be integrated into...
For the application of on-board energy storage equipment of rail transit vehicle, the bi-directional DC/DC is the significant converter. Considering the converter and super-capacitor load, the paper proposes a wireless charging circuit topology for the light rail transit. And a dual side control strategy is proposed to not only meet the requirements of the system energy output, but also maintain the...
The significant constraint for the applications of wireless power transfer is the low efficiency, compared to the traditional electric wired connection. In order to improve the transfer efficiency, a variety of compensation networks are proposed to reduce the reactive power transfer but parameter selection is only based on coupling coils and ignores the inverter loss. In this paper, compensation capacitor...
With the advent and development of power semiconductor switches like IGBT or MOSFET, high-speed switching devices have sprung up and sped up dynastic response of converters. However, these devices in operation will produce very large dv/dt and di/dt, which result in sever electromagnetic interference(EMI). In a variable-frequency drive(VFD) system, due to the coupling common-mode(CM) noise, communication...
This paper presents the design and implementation of a high frequency magnetic resonant coupling wireless power transfer (WPT) for middle power charging applications. The size and efficiency of resonator are depending on the resonant coupling frequency in the WPT system with magnetic resonant coupling. To improve the WPT efficiency, power capacity and resonator size, a high resonant coupling frequency...
In this paper an improved method for designing electric propulsion systems consisting of e-machine and inverter, based on a co-simulation, is presented. As the mandated emission limits of vehicles are expected to become stricter, advanced design methods are necessary to calculate accurate losses of machine and inverter. The approach contains the influence of inverter effects with acceptable calculation...
The coupling between adjacent through-silicon vias (TSVs) in 3D IC has been designed and analyzed from the power and frequency view. At first presented 2D 13 stage ring oscillator which consists of 45nm VTH CMOS transistors. Then 3D ring oscillator has been explored which consists of 3 tiers, where each tier consists of 4 or 5 inverters and each tier connected to the next tier vertically by TSV. The...
Distributed ac power systems using inverters connected in parallel are becoming increasingly widespread with the development of autonomous microgrids. Inverters can be controlled to emulate the dynamics of nonlinear oscillators, such that multiple inverters coupled through an electrical network will synchronize and share load in proportion to their ratings. In this paper, a communication-less control...
In this paper, the zero sequence circulating current in open winding (OW) permanent magnet synchronous machine (OW-PMSM) drives with common DC bus is systematically analysed for the first time. It is revealed that the zero sequence circulating current is affected by zero sequence back electromotive force (EMF), cross coupling voltages in zero sequence, from the machine side, pulse width modulation...
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