Dynamic Performance Analysis of Permanent Magnet Synchronous Motors

Rahman, M.A.; Little, T.

doi:10.1109/mper.1984.5526098

Cited by 27 publications

(8 citation statements)

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“…Thus, the hysteresis motor may be considered as a temporary PM motor [3], [5], [6], [10], [17], [26]. The performances of a single-phase IPM motor are computed using main and auxiliary stator windings [19], [23]. Problems of line-starting for single-phase IPM motors are the magnet brake torque during asynchronous speeds.…”

Section: Performance Resultsmentioning

confidence: 99%

“…However, these favorable properties stand opposite to the limitations of its self-starting ability arising out of oscillatory field, which is decomposed into forward and backward moving fields [3]- [6], [16], [22]. Like all PM motors, if the single-phase IPM synchronous motor is to be utilized widely in a line-starting mode, the rotor should be provided with good squirrel (conduction) cage bars including skewing [18], [19]. The starting behavior of the single-phase IPM motor should be further studied, and their performances need to be accurately predicted taking into account the magnet brake torque phenomenon arising due to rotor PM excitation.…”

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confidence: 99%

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Advances on Single-Phase Line-Start High Efficiency Interior Permanent Magnet Motors

Rahman

Osheiba²,

Kurihara

et al. 2012

IEEE Trans. Ind. Electron.

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The past 25 years have been a significant period with advances in the development of interior permanent magnet (IPM) machines. Line-start small IPM synchronous motors have expanded their presence in the domestic marketplace from few specialized niche markets in high efficiency machine tools, household appliances, small utility motors, and servo drives to mass-produced applications. A closer examination reveals that several different knowledge-based technological advancements and market forces as well as consumer demand for high efficiency requirements have combined, sometimes in fortuitous ways, to accelerate the development of the improved new small energy efficient motors. This paper provides a broad explanation of the various factors that lead to the current state of the art of the single-phase interior permanent motor drive technology. A unified analysis of single-phase IPM motor that permits the determination of the steady-state, dynamic, and transient performances is presented. The mathematical model is based on both d-q axis theory and finite-element analysis. It leads to more accurate numerical results and meets the engineering requirements more satisfactorily than any other methods. Finally, some concluding comments and remarks are provided for efficiency improvement, manufacturing, and future research trends of line-start energy efficient permanent magnet synchronous motors. Index Terms-Dynamicoperation, fractional horsepower, high efficiency, improved performance, interior permanent magnet, line-start, small motors, steady state. NOMENCLATURE A Magnetic vector potential. A z Axial component of magnetic vector potential A. B o Friction coefficient. C r Running capacitor. C s Starting capacitor.

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Section: Performance Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Advances on Single-Phase Line-Start High Efficiency Interior Permanent Magnet Motors

Rahman

Osheiba²,

Kurihara

et al. 2012

IEEE Trans. Ind. Electron.

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“…So far, starting and synchronisation of LSPMS motors have been challenging issues and of concern to many researchers [4, 5, [14][15][16][17]. A generalised simulation technique was developed based on 2-axis theory to predict the dynamic behaviour of the motor [15]. The main restriction factor in LSPMSSPM is the braking torque produced by PM and rotor flux barrier or rotor reluctance.…”

Section: Lspmsspm Challenge: Starting and Synchronisationmentioning

confidence: 99%

Design, optimisation, analysis and experimental verification of a new line‐start permanent magnet synchronous shaded‐pole motor

Shamlou

Mirsalim

2013

IET Electric Power Applications

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In this study, an optimal design of a new line-start permanent magnet synchronous shaded-pole motor (LSPMSSPM) is proposed. A genetic algorithm optimisation method based on transient two-dimensional finite-element method (FEM) is applied to reach a global optimum design. Advantages and challenges of the proposed LSPMSSPM are investigated, and its performance characteristics are calculated. Efficiency, power factor, starting behaviour and cost as important key factors are analysed. Finally, FEM results are verified with experimental tests. Nomenclature SY stator yoke Lfe stator and rotor stack length CL coil length CW coil width N turns of stator coil WG wire gauge BW stator bridge air-gap width BH stator bridge air-gap height BC stator bridge air-gap centre position α angle of stepped air-gap α0 starting angle of stepped air-gap SAB air-gap step at beginning SAE air-gap step at end θ1 angle of shading 1 θ2 angle of shading 2 RSH1 radius of shadings 1 RSH2 radius of shadings 2 RD rotor diameter NR number of rotor slots RSH rotor slot height RTW rotor tooth width MT magnet thickness ORM outer radius of magnet RR rotor rib BJ distance between rotor air-bridge and slot bottom BT rotor air-bridge thickness JML motor and load moment of inertia

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“…Starting and synchronization of LS-PMS motors have been challenging issues concerned by many researches so far [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Starting and Synchronizationmentioning

confidence: 99%