This paper investigates the effect of pole and slot combination on vibration noise in permanent magnet synchronous motor (PMSM). Two PMSMs that have same performances but different combinations are studied. A numerical analysis process for is introduced. First, by using electromagnetic field finite element (FEA) Maxwell stress tensor method, radial forces these two motors analyzed. In order to evaluate force vibration, then equivalent magnetizing current method used calculate local which...

As materials with various properties have been developed for the improvement of performance and lowering material cost permanent magnet (PM) motors, become major factors in determining motor performance. such a material, recently anisotropic bonded NdFeB PM showed nonlinear demagnetization curve. Thus, this paper, by considering property PM, process to calculate operating point, coupled analysis core, is proposed, applying process, characteristics interior synchronous according different...

This paper deals with two types of interior permanent magnet (IPM) motors, S-type and V-type. The V-type is optimized in the rotor shape to obtain better performance than S-type. In general, average operational torque (AOT) ripple IPM motors are greater those other due reluctance torque. generated by arrangement motor causes noise vibration. Therefore, this presents optimal V-shape, based on finite-element method, robust design, called Taguchi reduce improve ratio between AOT

This paper presents the method of reducing torque ripple brushless direct current (BLDC) motor. In BLDC motor, is decided by back-electromotive force (EMF) and waveform. If back-EMF constant in conduction region current, depends on ripple. The period freewheeling can be acquired circuit analysis using Laplace transformation also reduced varying input voltage to reduce suggested confirmed dynamic simulation with parameters 500W motor

This paper deals with the analysis for irreversible demagnetization characteristics of a ferrite-type permanent magnet in line-start motor using two-dimensional finite-element method (2-D FEM). The demagnetizing currents are calculated from transient combination voltage equation mechanical dynamic equation, and peak applied to computed by 2-D FEM. nonlinear characteristic magnetic core is considered as well that on B-H curve demagnetization.

Interior permanent magnet synchronous motor (IPMSM) is widely used for many industrial applications such as power train, compressor and home appliances due to its high density wide speed range. However, IPMSM have relatively torque ripple in comparison with surface mounted motor. In case of IPMSM, d-axis current should be fed use reluctance torque, the more needed goes up. Therefore, back electromotive force (EMF) contains much harmonics tend increase increase. This paper proposes a method...

In this paper, the bridge shape of interior permanent magnet synchronous motor (IPMSM) is designed for integrated starter and generator (ISG) which applied in hybrid electric vehicle (HEV). Mechanical stress rotor core caused by centrifugal force main issue when IPMSM operated at high speed. The thin area where mechanically weak point significantly affects leakage flux electromagnetic performance. Therefore, should be considering both mechanic characteristics. design process, we firstly find...

Integrated starter and generator (ISG) is working as after vehicle idle stopping during driving. When ISG works to operate engine, produces maximum power at the operating speed 4000 rpm remove vibration of initial starting engine. In that time whine noise which can be detected inside a vehicle. There are two methods reduce noise. One improving stiffness stator other reduction electromagnetic exciting force. Although improvement using mechanical design utilized effectively noise, forces more...

On account of high efficiency and power density, permanent-magnet synchronous motors (PMSMs) are mainly applied to a high-speed machine. Especially, because relatively easy magnetic circuit design control, surface-mounted PMSM them is adopted in almost the entire applications. However, has some weak points due sleeve, which nonmagnetic steel used order maintain mechanical integrity rotor assembly rotation. The sleeve causes additional eddy current loss besides permanent magnet increases not...

Radial force and tangential force, which deform stator core, are the main causes of vibration noise. There many methods to minimize such electro-magnetic exciting forces by designing magnetic core shape. However, modification rotor shape increases development cost motor. Therefore, step skewed is applied design reduce so that both reduction noise cost-effectiveness can be achieved. In order consider in interior permanent magnet synchronous motor (IPMSM), 3-dimensional finite element analysis...

This paper deals with the temperature estimation of interior permanent magnet synchronous motor (IPMSM). A thermal equivalent circuit IPMSM is proposed considering eddy current loss PM as well core losses rotor. Heat sources, which are stator/rotor and PM, calculated by numerical method to enhance accuracy estimation. The model represented resistances capacitances, determined configuration. Meanwhile, a test performed using prototype determine heat transfer. Finally, this verified in 25 kW...

Induction motors are widely used in various industrial applications with different torque-speed characteristics. Since the configuration of rotor slot has a great impact on electromagnetic characteristics, design optimization process is necessary to improve motor performance induction motor. The material boundaries represented by level set function, and voltage driven time-harmonic field analysis performed estimate characteristics An problem formulated maximize torque at one speed either...

This paper presents a design methodology and analysis for 4-kW 150-krpm ultra-high-speed surface-mounted permanent-magnet synchronous motor (SPMSM) to electrically assist turbocharger. The proposed is aimed at achieving required torque speed. In addition, this study seeks fast-speed response as objective eliminate turbo lag more effectively. First, an existing prototype that does not meet the target performance presented. loss prototype, which difficult obtain theoretically, obtained...

This paper proposes a new numerical formula and design method to reduce the torque ripple while improving efficiency control performance of an interior permanent magnet synchronous motor. In previous studies, inverse cosine function (ICF) has been used for reduction by making air gap flux density distribution sinusoidal under no-load condition. However, in this paper, advanced (AICF) based on ICF is proposed. It determines asymmetric rotor shape rendering sinusoidal, considering certain load...

This article proposes a design method of the high-speed multilayer interior permanent magnet synchronous motor (HSML IPMSM) employing ferrite (PM). Since maximum speed traction in this is 15 kr/min, mechanical stability must be considered. Additionally, case HSML IPMSM, as number PM layers increases, thickness PMs reduced to mechanically stable. On other hand, because has relatively low coercive force compared with Nd PM, an irreversible demagnetization IPMSM likely occur. Therefore, and...

This paper presents an investigation of the parameter modeling on basis improved finite element (FE) analysis in which variable frequency characteristic field weakening is considered interior permanent magnet synchronous motors (IPMSM). The parameters IPMSM have a nonlinear under load conditions and due to current phase angle system fed inverter. From FE, new vector control algorithm proposed by neural network using inductance estimator. performances are simulated algorithm, validity FE...

Detent force produced in permanent magnet linear machines generally causes an undesired vibration and noise. This paper analyzes detent thrust synchronous motor by using various minimization techniques. A two-dimensional finite-element analysis is used to predict due structural factors nonlinearity. Moreover, moving node techniques for the drawing models reduce modeling time efforts.

This paper deals with the optimum rotor design solution on torque ripple reduction for a synchronous reluctance motor (SynRM) concentrated winding using response surface methodology (RSM). The RSM has been achieved to use experimental method in combination finite element (FEM) and well adapted make analytical model complex problem considering lot of interaction variables. Comparisons are given characteristics SynRM according flux barrier number, width variation, respectively.

This paper presents the optimal design method of synchronous reluctance motor (SynRM) for high torque and power factor. It is difficult to barrier shape rotor by analytical because leakage flux between barriers saturation in core. Therefore, SynRM including structure proposed this using finite element (FEM) simulation experiment (DOE). Finally, characteristics model are compared with those worst one

Interior permanent magnet (IPM) motor is widely used for many industrial applications and has relatively high torque ripple generated by reluctance which results in noise vibration. Since the configuration of stator great influence on torque, design optimization necessary to improve performance IPM motor. In this paper, structural based level set method formulated reduce ripples minimizing difference between values at defined rotor positions constant target average value under constrained...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> This paper presents methods to reduce acoustic noise in an interior permanent-magnet motor during the design stage. Mechanical and magnetic sources are considered of machine, structural electromagnetic designs performed. In structural-design stage mechanical source, resonances moved higher frequency for enhancement stiffness. Then, electromagnetic-design exciting forces, harmonic amplitude forces...

This paper presents modeling of core loss resistance for <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">d</i> - xmlns:xlink="http://www.w3.org/1999/xlink">q</i> equivalent circuit analysis IPMSM considering harmonic linkage flux. High efficiency is one the major advantages IPMSM, therefore precise required high design. However, there practical limitation in calculation due to components flux especially speed region where field weakening generally...

In this paper, a static rotor eccentricity analysis method is proposed. Electromagnetic noise by occurs in the course of manufacturing. The increase errors attributed to manufacturing components: assembly and torsional caused shrink fitting. For these reasons, displaced from center stator bore, but it still turns on its own axis. Accordingly, acoustic using electromagnetic excitation force was analyzed according eccentricity. Finite-element used analyze considering electrical mechanical...

This paper proposes the design process of a 2.62-kW 150-krpm high-speed surface-mounted permanent-magnet synchronous motor. To meet required specifications, numbers poles and slots were determined by considering maximum speed rotary stability affected vibration rotor. In addition, this describes not only appropriate material selection method but also geometry based on analytic approaches. Furthermore, to precisely evaluate bearing windage losses at high speed, that combines finite-element...

Interior permanent magnet synchronous motors (IPMs) usually use NdFeB for achieving high-torque and high-efficiency performance. This paper reviews the performance of concentrated-flux-type ferrite (CFFMs) that ferrite, as an alternative to general type IPMs NdFeB. A structure reduce motor volume improve torque density CFFMs is suggested in this paper. The characteristics different rotor types are analyzed. parameters Using 2-D finite element analysis (FEA), efficiency size compared with...