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The purpose of this paper is to investigate the development of new high efficiency switched reluctance drives for hydraulic pump systems at low-cost applications. Therefore, the induction motors often used in conventional hydraulic pump systems until now, should be replaced by switched reluctance drives. Thus, switched reluctance machines, with can shields in the shape of hollow cylinders are mounted...
The aim of this paper is to analyse effects of power supply interruption on dynamics of induction motors connected to a synchronous generator in an autonomous operation. A complex mathematical model has been developed, whose components are: a diesel engine, a synchronous generator, a mechanical connection, and two unregulated induction motors which are fed directly from the synchronous generator terminals.
Although the multilevel inverter topologies are comprehensively studied in power conversion issues, novel topologies are still being sought in order to decrease required semiconductors for same output levels that are currently obtained with classical multilevel topologies. Several studies have been reported in the literature on multilevel inverter topologies and control techniques. However, the cascaded...
In this paper, the implementation of the Field Oriented Control and the Direct Torque Control in matrix converter supplied induction motor drives is analysed, and compared with the implementation in drives supplied by the Voltage Source Inverter. The analysis is accompanied by the results of numerical simulations and experimental implementations of these two control methods.
Starting form an existing induction motor, which was tested according to an international standard, an optimized model is developed in order to reach higher energy efficiency. The optimization procedure is based on the analytical model of the machine. Hence, the first step is to develop the model and to compare the results with the data provided by the international standard for validity purpose....
In the modern industrial world, many electronic and electrical control devices are designed with the use of modern power electronics, are characterized by an extreme sensitivity on power quality variations. Voltage sag, swell or interruption in one phase of a three-phase system due to LG fault, capacitor switching or any other reason is to be mitigated immediately for proper functioning of all the...
In this paper, firstly, the structural features and operating conditions of a universal motor are presented. Alternating current (AC) and direct current (DC) operating conditions of the motor and the difference between them are explained. Universal motors give similar speed and torque characteristics on both AC and DC operations when the effective current is kept equal. When AC and DC operations are...
Different current balancing configurations have been investigated for Primary Parallel Isolated Boost Converter (PPIBC). It has been shown that parallel branch current balancing is possible with several configurations of coupled/uncoupled inductors. Analytical expressions for branch currents have been derived for different cases of gate signal mismatch causing current imbalance. It has been observed...
Due to decrease in the cost of personal computer and several easily accessible software packages, computer-aided training has been became the most important technique regarding to other education methods in recent years. In this study, a training tool has been developed to analyze the serial and parallel RLC circuits which are one of the basic topics in the field of electrical engineering. For this...
This paper presents the control strategy of the permanent magnet synchronous generator (PMSG) for standalone wind power generation system with battery energy storage management during wind speed and load variations. The complete system includes a PMSG connected to the load through a fully controlled back to back PWM converter and an intermediate DC link capacitor which is connected to a battery energy...
Interleaving techniques are widely used to reduce input/output ripples, to increase the efficiency and to increase the power capacity of the DC/DC converters. This paper proposes an interleaved multiple-input power converter (IMIPC) that interfaces the fuel cell and energy storage systems (e.g. Batteries or/and Supercapacitors) to the powertrain of the hybrid electric vehicles. The IMIPC is responsible...
The main contribution of this paper is the application of Loss Minimization control algorithm of a three-phase squirrel-cage induction motor which is used in parallel with an internal combustion engine (ICE), in hybrid electric vehicles (HEV). During steady state operation of the electric motor, the electric motor's optimal motor flux profile minimizes the electric motor losses and maximizes the overall...
The main objective of static power converters is to produce an AC output waveform from a DC power supply. The output voltage waveform is not exactly a sinusoidal wave. Some ways should be found to improve the output voltage waveform. This paper introduces a method to minimize the total harmonic distortion (THD) of output voltage waveform in multilevel inverters. Steps amplitude of output voltage wave...
In this paper the performance of a neutral point clamped three level voltage source inverter is investigated. The inverter feeds an electrical drive which is controlled by field oriented control (F.O.C). The modulation technique used is Space Vector Pulse Width Modulation (SVPWM). Specifically, a new approach is proposed for SVPWM a three level inverter which can be extended to multilevel inverters...
Switched Reluctance Motor is simple structure motor which has great features that is appealing for industrial applications. The major remarkable features consist of robustness, no rotor winding which provides high speed application for this kind of motor. In this paper, a novel Multilayer Switched Reluctance Motor (MSRM) with 4 magnetically independent layers which each layer consists of 4 rotor poles...
We present in this paper an analytical model of the current-voltage (I-V) characteristics for submicron GaAs MESFET transistors. This model takes account the analysis of the charge distribution in the active region and incorporate a field depended electron mobility, velocity saturation and charge build-up in the channel. We propose In this framework an algorithm of simulation based on mathematical...
In this paper, we present the voltage build up process and the terminal voltage control of an isolated wind powered induction generator driven by a variable speed wind turbine using rotor flux oriented vector control. A description of the studied system is provided, and a simulation study is presented. The model used for the autonomous induction generator is a diphase one obtained by application of...
The switched reluctance motor is a simple and robust machine, which has found application over a wide power and speed ranges in different shapes and geometries. This paper introduces a new configuration for a three phase switched reluctance motor. The proposed novel motor consists of two magnetically independent stator and rotor layers, where each stator set includes six salient poles with windings...
This paper presents a method to maximize the output power of a DFIG wind turbine. In this method, an optimization technique based on mathematical analysis has been used. The modeling of DFIG is performed using MATLAB. To evaluate the maximum output power of a DFIG, detailed expressions for output power and losses are derived as functions of generator slip, the magnitude and phase angle of rotor excitation...
The paper presents a “hardware in the loop” emulator for a wind turbine system, used to tune and test in the laboratory the generator and the associate power electronics and control. The emulator includes: a Matlab/Simulink model of the wind turbine, an a.c. drive with direct torque control (the wind turbine equivalent) coupled with the real generator and the corresponding load. Digital simulations...
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