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This paper presents the design and optimization of a high-efficiency permanent magnet synchronous alternator with the desired output power of 2 kW at 6 krpm applying to the truck power system. This kind of alternator requires low output voltage and high current. In order to effectively increase the overload power handing capability and efficiency of the designed alternator, the low torque angle is...
This paper presents a research regarding a special design for a micro-wind turbine that drives a permanent magnet generator with two rotors that spin in opposite directions and recovering the energy by intermediate of brushes-rings system. The aim of this study is to develop and prove the functionality of a two rotors counter rotating permanent magnet generator by comparative results between the finite...
Multiphase induction motor (MIM) drives are becoming popular for high-power applications because of fault tolerant capability and wide range speed-torque characteristics. Using pole-phase modulation (PPM) technique, it is able to give high-torque for faster acceleration as well as high speed during steady operation. To achieve both these features, the MIM drive requires higher number of stator slots...
The paper presents the analysis of the performances of an Outer Rotor Synchronous Reluctance Machine as potential candidate for direct-driven low speed industrial application. The influence of slot/pole combination, as well as the number of flux-barriers was investigated in order to arrive to a topology suitable for the targeted application. The proposed machine has the highest average torque and...
Based on the fact that the three-phase induction machine proves higher performance under six-phase supply, which was demonstrated in Part 1 of the paper, this work investigates the fault-tolerance capability of the six-phase structure with asymmetrical configuration (30° phase shifting both for space and time conditions). It is taken into discussion the cut-off of one, two and three phases respectively...
Torque ripple presents the main disadvantage of switched reluctance motor. Advanced control methods allow to minimize the torque ripple, which requires knowing the motor parameters — inductance and torque characteristics. The paper presents parameter identification of switched reluctance motor with 2p1/2p2 = 12/8 number of poles. Included in this document are results of inductance and torque measurements...
In this paper, a semi-analytical modeling method is applied to a Doubly Salient Permanent Magnets machine. This machine is characterized by a rotor carrying a large number of teeth. It is suitable to applications requiring high torque and low speed. A Reluctance Network is used in order to model the machine with a good compromise between accuracy and simulation duration. Moreover, the antisymmetric...
The output torque of an interior permanent magnet synchronous motor (IPMSM) can be controlled within its allowable range using a pulse-width modulation (PWM) inverter. In this paper, the effect of the load torque on the iron losses of an IPMSM is studied by investigating three driving conditions, namely no-current, no-load and load conditions. The experimental data demonstrates that a torque increase...
This paper deals with the transient analysis of direct-on-line synchronous reluctance motor (SynRM) with symmetrical distributed rotor cage bars. Finite Element is utilized to analyze the transient behavior in both synchronized and unsynchronized regimes of the direct-on-line SynRM. In this paper two Synchronous reluctance motors are modelled and analyzed. The first motor is referred to as SynRM1...
The aim of this paper is the multi-physical modeling of synchronous permanent magnet machines using reluctance network, lumped mechanical & thermal models. First, the modeling approaches are presented and validated by comparing the obtained results to those of finite element method. Second series of parametric studies are done to maximize the torque's mean value and reduce its ripple by acting...
The variable reluctance machine (VRM), also known as the switched reluctance machine, is a class of electrical machines that exhibits many interesting characteristics. However, the satisfactory analytical formulation of its working equations (torque and voltage equations) in a saturated regime is not yet completely available for covering some of its operational aspects, such as the analysis of transient...
The low-efficiency design method of traditional motor usually needs a long time, so Cloud Computing is introduced for the traditional FEM and BP neural network to reduce the time consuming. In this paper, the electromagnetic axial torque of permanent magnet synchronous motor (PMSM) is used as calculation case. The utilizing Cloud Computing curtails approximately 4 times hour to calculate this case...
In this paper, a proposed analytical model is introduced for acceptable optimization of an axial flux permanent magnet (AFPM) machines. Nowadays the finite-element model is one of the most powerful tool to analysis the electrical machine. However, sometimes this method can be very time-consuming for further optimization. Therefore, in this paper, a hybrid analytical model based on sub-domain algorithm...
The cogging torque of variable flux reluctance machines (VFRMs) is usually large, which will result in undesired vibrations and acoustic noises. This paper introduces several methods to reduce the cogging torque of VFRMs including asymmetrical rotor teeth, circumferential rotor teeth pairing, rotor teeth shaping and rotor dummy slots. First, the cogging torque of VFRMs are analytically calculated,...
This paper presents a field-circuit coupled design and analysis method for the permanent magnet synchronous motor (PMSM) system used in electric vehicles. The time-stepping finite-element method is used to simulate the motor system, which integrates the electromagnetic field analysis of the motor prototype and the control algorithm of the drive system. A two-dimensional transient electromagnetic field...
Electrical and mechanical faults in a three phase Induction machine is modelled and analysed, to identify potential fault signatures. Electrical, magnetic and torque signatures are analysed for various faults and their combinations, for potential fault signature identification. A multi-physics Finite Element tool is chosen for this analysis considering the possibilities to extend the study to thermal...
An external rotor transverse flux motor has been proposed in our previous research, which has the advantages of low manufacturing cost and high torque density. In this paper, a novel transverse flux is introduced based on the foregoing motor's structure. At first, the detail motor structures and working principle are introduced. Then, the three-dimensional model of proposed motor is built by finite...
Following paper presents development and results of finite element structural simulations prepared in order to estimate contact pressure distribution on teeth flanks of gear transmission caused by assembly errors. In first paragraphs, importance of alignment precision of gear transmission components is described. As well, influence of machining and assembly errors on spur gear transmission was introduced...
An electric machine with permanent magnets on both its rotor and stator is proposed and studied. The key idea is to using the bi-directional flux modulation effect to realize a structure with more rotor poles and less stator poles. Compared with the conventional machines with single-sided permanent magnet excitation, the proposed machine has more flexible pole-slot design when the pole number is large...
The single-phase line-start synchronous reluctance motor (LSSynRM) is suitable for household appliances, but an optimized design of rotor, crucially influences the performance of motor, is hard to obtain. This paper optimizes the rotor design of LSSynRM to make a higher saliency ratio with the trade-off between saliency ratio and synchronizing ability. The mechanical-field-circuit coupled Finite element...
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