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2017 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) & 2017 Intl Aegean Conference on Electrical Machines and Power Electronics (ACEMP)
Advance in high-tech industries is due to evolution, respectively performance of electrical machines. Worldwide, designers are concerned to find answers to current questions such as: performance growth of asynchronous motors, reduce manufacturing and operating costs by adopting solution in line with global optimization approaches. Condition imposed to asynchronous motor design is limited startup current...
In this article we'll tackle the control of multi-motors electric drives with high dynamic, with rapid changes in torque and speed, with rigid coupling of motors, where the control strategy is FOC (Field Oriented Control) for each drives and the distributed control in local network using the CanOpen protocol. In the surface mining industry, from which the electric drive application for this article...
The purpose of this article is to design electromagnetic model for a three phase induction motor premium efficiency (IE3), rated power of 7.5 kW, 1000 rpm single layer windings, designed and produced as prototype by the company Electroprecizia Electrical Motors located in the county of Brasov, Romania.
Due to the high efficiency at the rated point and at partial load, the interest in synchronous reluctance machines grows steadily. A particular difficulty is the design of the flux barriers in the rotor. A simple approach to determine the shape of these barriers is to replicate the magnetic field lines in an isotropic rotor. For this purpose, a magnetostatic model is created and calculated analytically...
This paper presents a four stator-pole stator-ferrite permanent magnet synchronous machine single-phase self-starting small motor drive in terms of: adopted topology, FEM assisted optimization design and controlled dynamic model simulation results for PN=85W, IN=0.65A, VDC=290V (single phase inverter fed), nN=3000rpm, for an electrical efficiency of 87%.
In this paper, an observer-based speed sensorless field oriented control (FOC) algorithm is presented for induction machines. The state observer is based on a new, detailed observer model which describes the machine with seven state variables, i.e. with seven equations. Since these equations are strongly non-linear, the applied observer algorithm is the unscented Kalman filter (UKF). Using the advantages...
This paper deals with the start-up analysis of a synchronous reluctance motors (SynRMs) with uniformly distributed cage bars in the rotor structure. Two SynRMs are modelled using 2D Finite Element Method (FEM). The rotors of both motors are built with stamped conventional steel laminations having flux barriers. The first motor model (SynRM1) has closed rotor slots above each flux barrier separated...
The main purpose of this paper is to perform a vibro-acoustic analysis in order to predict acoustic response by Computer-Aided Engineering (CAE) models related to a single phase permanent split capacitor motor noise. The radial magnetic force between stator and rotor is a main excitation source to create deformations of the stator housing, causing vibrations and acoustic noise. These forces are determined...
This paper presents a control strategy for small wind turbines (WTs) to enhance their dynamic support capability in microgrids (MGs). For this purpose, the paper analyses two operation cases, namely the normal mode associated with the conventional control based on maximizing the power production, and a deloading mode where the WT operates under the maximum available power. The aim is to maintain a...
A new step-down dc-dc converter with one active switch and two diodes is presented. DC analysis is performed and static characteristics are derived, and then device stresses are evaluated and compared to other buck topologies. Design equations are provided, a prototype is simulated and finally experimentally tested. The measurements proved the feasibility of the proposed circuit. This novel converter...
A novel start-up method for an isolated full-bridge boost converter with modified phase-shift technique, for RES and automotive applications is proposed. In order to avoid the high inrush currents, the converter is operated in flyback mode at start-up. For precharging the output capacitor no auxiliary circuits or modified switching strategy is necessary. All the power switches of the isolated boost...
This paper is concerned with a portable automatic solar panel, mounted on a mobile trailer. The benefits of a mobile solar panel versus one mounted in a fixed position are highlighted. The paper focuses mostly on the efficiency of the solar panel, in relation to the sunlight angle with respect to the panel surface. The results of the analysis performed demonstrate the higher efficiency of the panel...
A family of DC/DC step-down converters with quadratic voltage transformation rate with only one low-side active switch is presented. The most promising topology using coupled inductors with pronounced step-down ratio is analyzed in detail. The circuit is especially useful for higher input voltages when diodes are used, which have lower losses than the active switch. The current and voltage waveforms...
With the popularity of Electrical Vehicles (EVs), Lithium-ion battery industry is also developing rapidly. To ensure the battery safety usage and reduce the average lifecycle cost, accurate State Of Charge (SOC) tracking algorithms for real-time implementation are required in different applications. Many different SOC estimation methods have been proposed in the literature. However, only few of them...
Hardware in the Loop (HiL) supports development processes in many types of applications. Power electronic systems with switching frequencies up to several kilo hertz constitute some of the most demanding applications for the quantization time of the HiL. The non-avoidable delay forces very short calculation periods which lead to high effort in hardware and software implementation. For PWM based controllers...
The purpose of this paper is to estimate the efficiency of the inverter circuits used for the Photovoltaic (PV) systems. The analysis of a power electronics converter with the SPICE during the steady-state operation takes a long time and the results may not be obtained accurately due to convergence problem in the solver. The MATLAB package program is widely preferred to analyze the power electronics...
Sustainable use of energy through an increased public and individual awareness is an important goal from several perspectives: it is a useful mean to obtain energy savings based on users behavior change, it is a way to understand the local and general context of energy ecosystem related to renewable energy contribution and to carbon footprint and its possible correlation with ambient factors. Thus...
The hydropower plants have been one of the most important points in the secure operation of the system in the last period. The massive introduction of the renewable energy sources with a variable production, determined the hydropower plants to become a major player in the power system control, helping stabilize fluctuations between demand and supply. The availability, flexibility and reliability of...
Efficacious work of the Li-ion battery (LIB) is strongly influenced by several factors as temperature, nominal voltage, capacity and charge/discharge current rate, determining its health and state-of-charge (SOC). SOC is an indicator mirroring the available charge stored in the battery relative to its maximum capacity when new, resembling the fuel gauge in the conventional, internal combustion engine...
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