Motors With Buried Magnets for Medium-Speed Applications

Kolehmainen, J.; Ikaheimo, J.

doi:10.1109/tec.2007.914331

Cited by 25 publications

(11 citation statements)

References 11 publications

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“…Yet, the authors pointed out the inaccuracy of the results in case that the tested PMSM has a heavy saturation along "d-axis". Numerical methods, especially FEA can provide accurate values of synchronous reactance along "d-axis", respectively "q-axis" and correlate with load conditions, [6], [16] ,and [17]. The two applied methods for parameter determination considered in this paper, load test and finite element analysis, show results with good correlation.…”

Section: Introductionmentioning

confidence: 89%

A study on determination of parameters for permanent magnet synchronous machine by comparing load tests and Finite Element Analysis

Carpenter

Deleanu

Nguyen

et al. 2011

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE)

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This paper presents a comparison between results, for two methods of obtaining the values of "d-axis" synchronous reactance X sd and "q-axis" synchronous reactance X sq , of the permanent magnet synchronous motor with radial magnets (RPMSM). The paper provides a background describing the benefits of using the RPMSM machine and how the synchronous reactance parameters are valuable in determining stability and control algorithms for the machine. The two methods described are a load test under constant frequency conditions and Finite Element Analysis (FEA). Results obtained from the load tests, including the internal load angle į, have been used to calculate X sd and X sq and represent their values with respect to the armature current and internal angle į. Comparative results have been extracted using FEA. Good agreement between results is illustrated. Future developments conclude the paper.Index Terms-Permanent Magnet Synchronous Motor (PMSM), Permanent magnets, synchronous reactance, radial permanent magnets synchronous motor (RPMSM), counter electromotive force (back EMF), saliency ratio, Finite Element Analysis (FEA), position transducer, Samarium Cobalt (SmCo), Normal Flux Density SYMBOLS AND NOMENCLATUREf n -nominal frequency I sd , I sq -"d-axis" , respectively "q-axis" component of the stator current in the rotor reference frame V sd , V sq -"d-axis" , respectively "q-axis" component of the stator voltage in the rotor reference frame L s -Stator self inductance L sd , L sq -stator synchronous inductance along the "d", "q" axis RR ngle) s -stator resistance v s , i s -space vector of the stator voltage and current į i -electrical Angle between the phase voltage and the phase induced EMF (internal angle or load a ĳ -power Factor Angle (angle between v s and i s ) ȕ -torque Angle (the angle between i s and the "d-axis") Ȧ r -rotor angular frequency Ȧ n -nominal angular frequency) T e -electromagnetic (developed) torque T L -load torque E i -total Induced EMF per phase E PM -induced EMF due to the permanent magnets per phase X sd , X sq -direct ("d-axis") and quadrature ("q-axis") reactance V s , I s -stator voltage, respectively current, steady state S 1 , P 1 -apparent , respectively real input power of PMSM cosĳ -input power factor of PMSM P 1 -input real power P 2 -output (shaft) power S 1 -input apparent power INTRODUCTIONThe PMSM has become popular in recent years because of its advantages over the wound rotor synchronous motor: These advantages include higher specific torque and shaft power, robustness, lower maintenance costs, better dynamic performances, as well as simplified converter configurations for variable frequency operation.In comparison with the induction machine, a PMSM displays higher efficiency and power factor vales for the same load conditions. Consequently, a PMSM drive will require a variable frequency converter with lower ratings than an induction motor similar pole configuration and power rating.Following significant advances in power electronic systems, control strategies and permane...

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Section: Introductionmentioning

confidence: 89%

A study on determination of parameters for permanent magnet synchronous machine by comparing load tests and Finite Element Analysis

Carpenter

Deleanu

Nguyen

et al. 2011

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE)

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“…The magnets are mounted on the rotor in different ways. Axial-flux machines usually have their magnets mounted on the surface of the rotor, while radial-flux machines may have the magnets either surface mounted or internal mounted (Kolehmainen & Ikäheimo, 2008). Internal mounted magnet machine properties vary with the geometry and configuration of the rotor.…”

Section: Pm Machine Topologiesmentioning

confidence: 99%

Electric Machine Topologies in Energy Storage Systems

De¹,

Oliveir²

2010

Energy Storage

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“…Depending on the arrangement of the magnets, 3 main variants of this typology may be identified: polygonal, radial or star layout (e.g. [3], see fig. 2).…”

Section: B Buried Magnets Machinesmentioning

confidence: 99%

Consequent-pole brushless machines featuring uneven magnet-pole width ratio

Bolognesi

Papini

Biagini

2010

The XIX International Conference on Electrical Machines - ICEM 2010

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Φ Abstract--Permanent magnets synchronous machines are used in many different applications. While the popular surface magnets isotropic variant is the simplest to manufacture and control, its relatively low airgap flux density limits the specific performances that are further reduced when a bandage is used to retain magnets. The different buried magnets variants may be tailored to improve the most relevant aspects, yet resulting more complex and expensive with a less robust rotor core. Inset magnets machines may constitute an interesting intermediate solution. In particular, the consequent pole variant features a simple and robust structure with some design flexibility. This paper investigates the opportunity to design consequent-pole machines featuring rotors with different pole and magnet angular width, aiming to improve the specific performances by better exploiting the potential of silicon steel laminations.

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Motors With Buried Magnets for Medium-Speed Applications

Cited by 25 publications

References 11 publications

A study on determination of parameters for permanent magnet synchronous machine by comparing load tests and Finite Element Analysis

A study on determination of parameters for permanent magnet synchronous machine by comparing load tests and Finite Element Analysis

Electric Machine Topologies in Energy Storage Systems

Consequent-pole brushless machines featuring uneven magnet-pole width ratio

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