Eccentricity is an inevitable fault in electric motors and hence its diagnosis important topic. Thus, the influence of static dynamic eccentricities on harmonics frequency spectra unbalanced magnetic pull analyzed. In this article, dimensional tolerances rotor stator are also considered. All parts have their designs real magnitudes vary to some extent from theoretical values after manufacturing process. Thanks analytical calculations finite element simulations, verified with experimental...

Nowadays the comfort in passenger transport system is very relevant. One source of noise and vibration torque ripple. Torque ripple can be generated by an inappropriate machine control tuning inherent machine. In permanent magnet machines, composed three components: electromagnetic torque, reluctant caused winding magnetic field, commonly known as cogging torque. order to assess at each working point, analysis using a Finite Element Method (FEM) accurate solution. dynamic simulation high...

Linear switched-flux machines are a kind of permanent magnet machine with passive ferromagnetic secondary. Therefore, they can achieve both good performance and low cost in long stroke applications. However, due to the end effect, these generate high detent force on load thrust ripples. There several solutions literature that aim minimise ripple. One those is placement additional poles ends machine. These be passive, <italic xmlns:mml="http://www.w3.org/1998/Math/MathML"...

In the present paper a time domain simulation of overall electric drive, comprising power converter, cables and electrical machine is developed in order to analyse detail electromagnetic compatibility system. The simulations are validated by experimental test performed over an industrial converter-motor system, very good agreement obtained between results measurements.

Nowadays the compactness, cost effectiveness and low torque ripple are some of most demanded requirements in electrical machines. Due to these requirements, Fractional Slot Concentrated Windings Permanent Magnet Synchronous Machines getting more popularity. However, this kind machines sensible mass production tolerances, which can increase ideal ripple. Apart from that, decreasing volume magnets and/or selecting with worse thermal properties, costs decreased. Nevertheless, fact increases...

There are several fault types that may arise in electric motors decreasing both reliability and comfort. Eccentricity is one of the main faults, therefore, tools needed to detect do not fulfil quality requirements. This paper proposes a methodology based on novel experimental test bench assess static dynamic eccentricities, since it generates continuous controlled values eccentricities. A permanent magnet synchronous motor analysed bench. The unbalanced magnetic pull measured by force...

Eccentricity is an inevitable fault in electric motors and hence its diagnosis important topic. Thus, the influence of static dynamic eccentricities on harmonics frequency spectra unbalanced magnetic pull analyzed.In this study, dimensional tolerances rotor stator are also considered. All parts have their designs real magnitudes vary to some extent from theoretical values after manufacturing process. Thanks finite element simulations, verified with experimental results, it observed that...

Permanent Magnet Synchronous Motors (PMSMs) are increasingly being used and required to satisfy noise vibration specifications. Thus, it is necessary develop design guidelines for electric motors that consider response as a key output of the design. This work shows influence main parameters regarding PMSMs: number slots poles. First, in natural frequencies analysed by Finite Element calculations, which experimentally verified. Then, analytical calculation explained. applied several...

The use of electric motors, and particularly, Permanent Magnet Synchronous Motors, is increasing in recent years, their vibration response one the most crucial aspects regarding behaviour. Thus, reduction vibrations key objectives when optimizing motors. In an initial design state, influence main parameters on behaviour machines not always clear. For that reason, this work presents a global sensitivity analysis procedure allows identifying influential determining guidelines to optimize...

Noise and vibration of electrical machines are a major concern for applications where comfort is significant aspect. There several faults that may arise in increasing noise vibration. Cogging one the main Permanent Magnet Synchronous Machines (PMSMs). Tools diagnosis cogging needed to detect do not fulfil quality requirements. The usual methods found bibliography assess Motor Current Signature Analysis (MCSA) or directly measuring it by means torque sensor. This paper studies feasibility...

The fractional slot permanent magnet synchronous machines are well-known for their low torque ripple. However, in mass-production machines, not all the magnets identical due to manufacturing tolerances and new harmonics could appear. In addition, magnetic field is modified unbalanced pull (UMP) happen. Apart from that it important study effect on vibrations since no longer ideal. So, here, a of unevenly magnetised distribution ripples, unbalance pull, proposed. that, tolerance grade...

Nowadays Fractional Slot Permanent Magnet Synchronous Machines are getting more and relevance due to their cost effectiveness low torque ripple. Therefore, they suitable for high comfort applications. However, if during the manufacturing process assembling errors made or tolerances not properly set, ideal conceptual characteristics could be achieved. Hence, in this paper an error magnetization caused by incorrect alignment of magnetizer is studied. Demagnetized magnets placed rotor then a...

Thanks to the usage and placement of permanent magnets, linear switched flux machines exhibit a good performance even at moderate cost. However, these are affected by high detent force on load thrust ripples. The additional magnets in ends machine is one possible solutions deal with depending magnet width sizing approach, this solution may increase value peak force. In paper, two new end optimisation approaches presented compared conventional approach. results show that both ripple can be...

Eccentricity is a common error in electric motors, so its diagnosis an important issue. Therefore, the effect of static and dynamic eccentricities on harmonics frequency spectra voltage phase studied.In this research, dimensional tolerances stator rotor are also taken into account. The designs all pieces have tolerances, hence their real magnitudes change to degree from theoretical values after manufacturing process. As result finite element simulations, validated by experimental results,...

In this article a general analytical model for the analysis of permanent magnet synchronous machines with static eccentricity is presented. The continuation [1] and it based on Fourier time-space series formulated in 2-D coordinates. results are corroborated by simulations finite element method over two different machines. show good agreement obtained from simulations.

The vibration of the stator frame due to electromagnetic forces is one main noise and sources electric machines. In some applications, wide variety working conditions, design optimizations are not enough, control machine needed reduce vibrations. Therefore, this work presents a reduced model, be used during control, which able estimate vibrations Permanent Magnet Synchronous Machine. Finite Element calculations performed, results saved in Look-Up Tables implemented calculation procedure,...

Line start permanent magnet machines (LSPMSMs) are a promising machine technology for upgrading the industrial induction motors. Thanks to usage of magnets, LSPMSMs can generate high torque density values, which be very useful direct-drive applications. Nevertheless some critical design aspects such as starting and synchronization issues must overcome. These performances even more in pole number In this paper, multipole LSPMSM comprising 16 poles is designed analysed its application an...