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Hybridization of passenger vehicles is about to become a significant business among carmakers and suppliers. This will start in a couple of months in the premium class and will arrive, step by step, in the high volume classes. This process is often referred to as the migration of electric drives in cars. However, a paradigm change from hybrid to electric cars is not achievable by the technology used...
Recently, the automobile industry has focused on increasingly severe environmental issues. Both the reduction of CO2 and the promotion of alternative energy sources have become of immediate importance, and thereby, demands for next-generation vehicles have been growing. Toyota has introduced several hybrid vehicles (HVs) since 1997, and has recently been developing plug-in hybrid vehicles (PHVs),...
This paper demonstrates an analytical suggested model for enhancing the performance of Thin-Film Transistors (TFTs) by replacing the conventional silicon dioxide gate dielectric with high-k gate dielectric novel nano-composite PVP/La2O3 (kox=25). Our suggested model has a Single nano-composite Material Gate SMG MOSFETs. Also, it has been studied the effects of the gate-dielectric permittivity, spacer...
A new ground fault detection method based on third harmonic injection and the measurement of third harmonic current is presented. As the third harmonic is a common mode signal in a three phase system, its existence in current is a sign of a ground fault.
This paper describes small-signal analysis of a photovoltaic boost converter with an emulated load controller and a resistive load. The simulation results of the derived model are compared to time-domain large-signal simulation results for verification. This analysis helps select the time interval between iterations of Perturb and Observe algorithm. It was found that output voltage takes longer time...
Novel compact high frequency high voltage (HV) power supply is introduced for small volume, lightweight, ultra fast high voltage output application. The two key factors high frequency HV transformer and voltage multiplier diodes are evaluated in this paper. The HV resonant tank size is only 1L for 400kHz∼500kHz 35kV 2kW output, the rise time for output HV is around 100us by lab prototype experiment...
For vehicle comparison from point of view of green gas production it is necessary to add to the green gas production of the vehicle itself also the quantity that was necessary to produce the fuel for internal combustion engine ICE or the electric energy for electric vehicle. Only this attitude is objective. This paper reveals simulation results of CO2 emission produced by different types of car drives...
Under an unbalanced load 2nd harmonic DC link and 3rd harmonic at AC input current of a shunt APF appear due to the fundamental negative frequency load current. These low order harmonics can cause a series of high order harmonics at both of AC and DC sides. In this paper a new control method is presented to eliminate the 2nd ripple of DC link voltage to alleviate the stress of the DC-link capacitor...
The Energetic Macroscopic Representation (EMR) has been imitated in 2000 to define control schemes of electric drives. Since 2002 this graphical tool has been introduced to teach drive control in France, then Canada, Switzerland and more recently China. A first paper has described a 5-ECTS unit for initiation level in a Master degree. A second paper has described a 5-ECTS unit for an expert level...
The goal of this paper is to evaluate an interleaved buck topology for driving high current light-emitting diodes. Low output capacitor value allows the use of non-electrolytic capacitors extending the lifetime of the converter. Converter is operated as a constant, regulated current source which increases luminous efficacy of LED compared to PWM dimmed system. Because of the low dynamic resistance...
The paper analyses the dynamics of generator-units, as well as induction motors during impact loads. Mathematical model of integral motor drives consisting of: diesel engine, synchronous generator and motor drives has been developed. The aim is to compare torsional dynamics during direct-on-line starting of induction motors with changing loads.
This paper presents a transformerless topology of series active power filter with capability to protect sensitive loads against harmonics, sags, swells and unbalances of the power system voltages. The proposed topology is constituted by three isolated H-bridge with a voltage source at the DC side. The series active power filter has been studied with the help of PSIM (Power Simulation software) and...
This paper presents a frequency switching analysis of an interchanging topology of the Unified Power Quality Conditioner (iUPQC). It includes simulations with hardware-in-the-loop development tool, which allows the control code development (embedded in an actual fixed-point DSP) directly working in a simulated iUPQC (PSCAD/EMTDC simulator). The aim is to reduce the frequency switching of both series...
The energy accumulator in electric vehicles must be laid out for many different areas of application. On the one hand, the battery must provide enough energy to overcome longer distances with high velocity. On the other hand the battery must be laid out to temporarily supply high peak current for a short time, e.g., during the acceleration. Or the battery has to store much energy in a short-time e...
The first modular multilevel converter for HVDC application went operational in 2010. The Trans Bay Cable project transfers 400 MW of electrical power from Pittsburg, CA to the city of San Francisco, via a subsea cable of 88 km. It clearly demonstrated that the advantages of this technology are not only of theoretical nature, but can also be achieved in practice: efficiency comparable to thyristor-based...
This paper proposes the planar passive components integration technology for power converters to investigate the technology feasibility. The planar passive components integration technology with the advantage of component amounts reduction, compact volume, better thermal management, high reliability and potential cost saving is an enabling platform technology for power converters miniaturization....
This paper is about the development of a temperature-dependent driving strategy for a 3.3 kV-1200 A planar-gate non-punch-through (NPT) insulated-gate-bipolar-transistor (IGBT) power module. In particular, the proposed strategy aims at counterbalancing the effect of variations in ambient temperature on the power losses of the semiconductor devices by regulating the amplitude of the applied gate-emitter...
In this paper, we propose a novel direct torque control (DTC) system for permanent magnet synchronous motors (PMSM) based on model predictive control (MPC). The proposed method achieves a comparable torque ripple with lower inverter switching frequency than a conventional DTC.
Restricted battery capacities and long charging times for battery electric vehicles (BEV), range extender vehicles are a good alternative to reach a bigger range. This paper describes how an operation strategy which is adapted to the power requirements of the driving cycle is used to increase the range of range extender hybrid vehicles. Adaptation of the range extender unit's power output to the momentary...
The planned increase of instrumentation sensitivity in the ATLAS experiment of the Large Hadron Collider (LHC), at CERN, calls for a thorough re-design of the power distribution architecture. The paper describes the implementation of the main DC-DC converter for the LAr electromagnetic calorimeter. Design consideration and experimental results are provided.
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