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This paper proposes two different low-cost ferrite solutions: first a V permanent magnet assisted synchronous reluctance rotor (VPMSynRM) and the second a permanent magnet synchronous rotor with flux concentrator (PMSM-FC) as an alternative solution to the rare earth inserted tangential permanent magnet synchronous motor (PMSM). Finite element (FEM) approach has been utilized to show the performance...
This paper proposes two low-cost ferrite V permanent magnet assisted synchronous reluctance rotors (VPMSynRM) as an alternative solution to the rare earth inserted tangential permanent magnet synchronous motor (PMSM). Finite element (FEM) approach has been utilized to show the performance of the proposed rotors. The purpose of the proposed solution is to replace only the rotor of such a PMSM that...
The paper deals with the design, FEM analysis, and testing of a surface-mounting permanent magnet (PM) generator with an inner rotor for wind applications. The purpose of this work has been to build a PM generator with simple structure, good performances and very low cogging torque. With a view to minimize the cogging torques, a very high Least Common Multiplier (LCM) between the number of poles and...
The paper establishes a preliminary pragmatic method to obtain the control strategy of an innovative small windgenerator prototype. There is presented the proposed structure of the considered wind energy conversion system, respectively its components and subsystems. There were considered the wind turbine, the generator, the electronic converters, the brake systems and their characteristics, being...
Based on the mathematical model of the wind turbine at a wind speed modeled as a sin wave in time, this paper analyses the behavior of the system with P, PI and PID regulators. We determine the speed at which the system must work in order to obtain a maximum amount of electricity in a time interval of hours and days. For this purpose, we measure the wind speed and knowing the mechanical characteristic...
The paper deals with the design, FEM analysis, and testing of a surface-mounting permanent magnet (PM) generator with an inner rotor for wind applications. The purpose of this work has been to build a PM generator with simple structure, good performances and very low cogging torque. The paper presents the main design aspects and the performance characteristics of a 5 kW, 120 rpm and some test results...
The present paper refers to some examples that use the finite element method (FEM) in the process of analysis, design and optimization of the electrical machines used in wind energy conversion systems. The 2D-FEM program Opera 13 of Vector Fields is used in the analyzed examples. These examples refer to two types of synchronous generators with permanent magnets. Some possibilities and advantages of...
The power quality is one of the main interests within the power generation, delivery and transmission domains. In order to have a higher quality for the power produced in synchronous generators (mainly located in hydro power plants), using an adequate excitation system is essential. This paper shows a general overview of the main tasks which Romanian power producers have to accomplish today. It also...
The paper deals with the design and testing of a surface-mounting permanent magnet (PM) generator with an outer rotor for variable speed applications. The purpose of this work has been to build a PM generator with simple structure, good performances and relatively low costs. The paper presents the main design specifications and the performance characteristics of a 3 kW, 250 rpm and some test results...
The magnetic field and the levitation force produced by a rotor with alternating magnetic poles in a hydrostatic bearing, with magnetic fluid, are evaluated numerically. The magnetic liquid is considered as a nonlinear medium. The 3D-FEM program MagNet 5.0 is used for the magnetic field computation and the MatLab program is used for the numerical evaluation of the levitation force that acts on the...
The paper presents a comparison between two models used for nonlinear magnetic field analysis of three phase induction machine in no-load conditions. The firs one is a numerical model based on Finite Element Method (FEM) and the second one is an analytical anisotropic model. In the paper are presented some numerical comparative results concerning space distributions of the magnetic field and some...
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