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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...
This paper describes a PSIM simulator for the analytical approach of the HEV (Hybrid Electric Vehicle) power train operation. For this research, a series-parallel type HEV (SPHEV) are chosen to apply the Forward-Facing approach simulation method. As the traction power of the series-parallel type HEV can be supplied from both of the ICE (Internal Combustion Engine) and the traction motor, the planetary...
Ion implantation is one of the most common processes in semiconductor manufacturing. Unfortunately the implantation depth and is limited due to the mass of phosphorous or arsenic. Proton irradiation can go beyond this limit and be utilized to adjust the doping of silicon power devices even in a high depth. The creation of donors is studied for high energy, high dose proton irradiation (2 MeV, fluences...
Reliability is a major economic and technical challenge for power electronics. This paper aims at exploring the impact of reconstruction of source metallization [1] due to ageing on temperature and mechanical strain distributions within a smart power device. Based on 3D FEM electro-thermal simulations, we explore thermal and mechanical impact of source metallization ageing on bonding wires during...
This paper introduces neural network aided unscented Kalman filter (NNUKF) for sensorless control of ac motor drives. Unscented Kalman filter (UKF) is completed by on-line trained neural network which compensates unmodeled dynamics and uncertainties of a drive model. This technique significantly improves behaviour of estimator in critical operating states, especially in low speeds.
With the fast development of wind power, the reliability of power systems becomes more difficult to be evaluated. Grid operators are lacking tools for day-ahead decision making in presence of a high penetration of uncertain generation. Short-term power system reliability evaluation using Monte Carlo Simulation (MCS) is not feasible due to its high computation cost. This study proposes to use the First-Order...
This paper points out the need for increasing availability of the power electronic converter in offshore wind turbines by means of statistical data. Therefor possible strategies such as condition monitoring, prognosis, and fault tolerance are proposed and discussed by taking into consideration state of the art and feasibility. Fault tolerant operation is evaluated to be the most efficient way to increase...
In this paper, a new switching table for direct power control (DPC) strategy is proposed for three-level NPC rectifier. The strategy is developed by analyzing active and reactive power and introducing convenient controllers to optimize the voltage selection which is the fundamental task in that control method. The dc-link voltages are maintained at the required level using hysteresis controller for...
Wind energy has been regarded as an environmentally friendly, logistically feasible and economically responsible alternative energy resource. In order to produce as much power as possible in variable speed wind turbine generators, the maximum power point tracking (MPPT) becomes a hotspot of research in this field. In this paper, a simple control method for maximum power point tracking (MPPT) in a...
A time-localised iterative least square (TILS) based predictive zero-crossing detection (ZCD) algorithm for signals with slowly varying amplitudes and phases has been proposed in this paper. Useful for digital implementation, this technique predicts the zero crossing instant in advance so that further control decision based on ZCD could be performed without delay. The analytical formulation has been...
Active du/dt filtering method can reduce the size of filter component physical size, and achieve superior filtering results. This enables very low overvoltage with long motor cables. The losses and power dissipation associated with the method is addressed. A comparison with passive filters is introduced, and silicon carbide components evaluated. The use of silicon carbide free-wheeling diodes results...
This paper presents a detailed analysis of the behavior of a DC-DC boost-flyback converter which is a single-switch step up converter with a high voltage gain. The behavioral investigation of this converter is carried out supposing it consists of two converters, a boost and a flyback connected in series. The interesting characteristic of this boost-flyback converter is its modes of operation (continuous,...
A predictive control scheme for a three-phase cascaded h-bridge rectifier is presented. The main objectives of this control scheme is to minimize the error between the input active and reactive power and their references, and to balance the dc-link capacitor voltages. These objectives are expressed as a cost function to be minimized. A model of the converter is used for calculation of the predicted...
In this work, we report the characterization results of GaN/4H-SiC heterojunction vertical pn power diode. The diode is realized using four separate epitaxial growth mechanisms: a) direct growth of p-GaN over n-(4H)SiC; b) growth of p-GaN over n-(4H)SiC with AlN as the interface layer; c) growth of p-GaN over n-(4H)SiC with Ga-flux as the interface layer; and d) growth of p-GaN over p-(4H)SiC. The...
This paper presents the effect of energy efficient control strategies on positioning processes of induction motor servo drives. In comparison to conventional trajectories that operate at constant rated flux optimized motion and flux trajectories lead to a significant reduction of energy losses in the drive system.
A new power converter interface for permanent magnet synchronous generator (PMSG) based wind energy conversion systems (WECS) is presented in this paper. The converter stage is capable to step-up the low-voltage side of standard six-phase PMSG used in today's WECS to a medium-voltage grid side. The proposed converter is an hybrid back-to-back topology composed of two series connected three-phase voltage...
Power Hardware In the Loop (PHIL) is a recognized technique to extend Hardware In the Loop tests to power level by enforcing conservation of energy at the connection between real and virtual portions of the system under test. In this paper we present the design of a flexible hardware interface to perform PHIL testing: some experimental results are also presented
A hardware implementation of a quad-inverter configuration for multi-phase multi-level induction motor drives is presented in this paper. The scheme is based on four conventional 2-level three-phase voltage source inverters, able to supply the open-end windings of a dual three-phase motor (asymmetric six-phase machine), quadrupling the power capability of a single VSI with given voltage and current...
In modern high power industrial processes, multipulse cycloconverters are fundamental to feed synchronous motors. Given the importance of these critical processes, especially for mining industry, the reliability of the high power drive is critical. Having a fault-tolerant cycloconverter is quite valuable and it will reduce the economic losses caused by long repair times of the converter. Currently...
A novel current-mode nonlinear fuzzy controller with adaptive gain is developed for the LCC resonant converter applied in very low frequency high voltage generators using switching frequency and duty cycle as control variables. The designed fuzzy controller is verified through simulations. Comparison between the fuzzy controller and a standard linear controller indicates the correctness and effectiveness...
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