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In the present work, two algebraic approaches to calculate magnetic flux linkage of Surface Permanent Magnets Synchronous Machines, (SPMSM), are described. The first one is based on a developed magnetic circuit for load condition, and the second one consists on a magnetic permeance network. Although both approaches's base is algebraic, the existing complexity difference between them, makes interesting...
This study introduces indirect water cooling systems and their improvements utilized in proto typing of vehicle machines. Due the vehicle machines require high torque at acceleration they are often equipped with indirect liquid cooling. One common method to implement liquid cooling is a water jacket inside machine frame as well as on the end plates. The flow rate of different cooling systems are studied...
This work studies the effect of protrusions and voids in DC cables taking into account the effect of conductivity and field distribution in DC cables. A 2D-FE model has been developed in order to verify theoretical analysis, revealing good agreement with analytical formulas.
This project has been oriented to the development of an energy system unit for powering tramways during shorts periods of time. The aim of this work is to present the results obtained for a high frequency DC-DC converter which is included in the energy unit. The energy unit will consist on two type of energy storage devices: a battery stack and a supercapacitor stack. A comparison of the simulated...
The influence of flat magnets (FM) in surface- mounted permanent magnet machines (PMM) is analyzed taking the conventional single curved magnet (SCM) configuration as reference. The flat shape of magnets and the air gap between them increase the magnetic circuit reluctance and distort air gap flux density. As a consequence, the back electromotive force (BEMF) decreases due to a reduction in the fundamental...
The presented work analyzes the influence of using Flat Magnets (FM) instead of a Single Curved Magnet (SCM) in surface-mounted Permanent Magnet Machines (PMM). FMs distort the air gap flux density due to non- constant air gap height above magnets and air spaces between magnets. Consequently, the air gap flux density fundamental harmonic component is smaller than that produced by a SCM. The larger...
This paper presents two control techniques for a radial active magnetic bearing (AMB) system in a kinetic energy storage flywheel: Pole placement control and Sliding mode control. Both control methods are based on a previous feedback linearization of the nonlinear 3-pole magnetic bearing configuration. The whole system is modelled and simulated in MATLAB/Simulink so that both controls can be compared...
This paper provides an automatic tool for the sizing, calculation, optimization and simulation of multipole radial flux permanent magnet synchronous machines (RPMSM). Only four parameters must be defined to obtain the machine: output power, rated voltage, frequency and number of pole pairs. firstly, geometric, electric and magnetic characteristics are obtained. Secondly, an accurate calculation of...
This paper presents a MATLAB/Simulink simulation model for a direct space vector modulated matrix converter (MC). The power circuit model, consisting of an input filter, a matrix of bidirectional switches and an RL load, is completely implemented using the power library in Simulink, contributing to the simplicity and clearness of the whole model. Two switching strategies are modeled, simulated and...
The main purpose of the work presented in this paper is to obtain a simple and reliable analytical method for the pre-design of surface permanent magnet synchronous generators. With this aim in mind, a design algorithm based on several methods from the bibliography has been developed and programmed. The results from this pre-design have been contrasted by Finite Element Method models and also by testing...
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