Performance evaluation of fractional-slot tubular permanent magnet machines with low space harmonics

Wang, Jiabin

doi:10.1515/aee-2015-0049

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…It is also known that the frequency of phase mechanical resonance (hereinafter the phase mechanical resonance means the coincidence of the main harmonic components of electromagnetic force and mover speed) does not coincide with the frequency of maximum motor efficiency and maximum amplitudes of acceleration and displacement [8]. If we take into account that in addition to mechanical resonances, there are also electrical resonances, as well as some influence of the salient-pole structure of the magnetic system and harmonics of electromagnetic force on the force-angle characteristics of the motor [9,10], the problem of choosing the optimal machine parameters to provide the required mode of mechanical oscillations becomes ambiguous and controversial.…”

Section: Introductionmentioning

confidence: 99%

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Resonant Modes of a Linear Permanent Magnet Vibratory Motor

Bondar

2022

Teh. elektrodin.

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The work considers the resonant operation modes of the linear permanent magnet vibratory motor. On the basis of electrical and mechanical equivalent circuits with lumped parameters, expressions for determining the frequencies of mechanical, electrical, energy and power resonances are obtained. The presence of two frequencies of electrical resonance (when the phases of supply voltage and motor current coincide) in a single-mass electromechanical system and four in a two-mass one is substantiated. Representing, according to the electromechanical analogy approach, the back EMF induced due to the movement of the mover by the corresponding voltage drop, expressions for equivalent mechanical impedances are obtained. The dependences of the energy characteristics of the motor (mechanical work and efficiency) on the equivalent circuit parameters are obtained. Based on the expression for the reluctance electromagnetic force, mechanical work is found and its dependence on the phase difference between displacement and current is shown. The phase difference at which the total mechanical work of the motor is maximal is determined. It is shown that the results of the analysis of resonant modes well agree with results of a numerical field study carried out on the basis of the equations of the quasi-stationary magnetic field in the time domain using the finite element method and the moving type of calculation mesh in the mover region. References 12, figures 6, tables 1.

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Section: Introductionmentioning

confidence: 99%

“…. Analysis of expression (9) shows that the dependence of mechanical reactance on frequency has two areas with are inductive reactance and two areas with capacitive one. It follows that, depending on the mechanical and electrical impedances, electrical resonances at four different frequencies can be observed in such a system.…”

Section: Introductionmentioning

confidence: 99%

Resonant Modes of a Linear Permanent Magnet Vibratory Motor

Bondar

2022

Teh. elektrodin.

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“…On one hand, the motor running high-frequency electromagnetic noise is loud [4], and the motor efficiency is reduced. On the other hand, due to the motor rotor has difficult heat dissipation, eddy current loss produced by permanent magnet will cause permanent magnet (PM) temperature rise too high [5][6][7], even partial irreversible demagnetization, which will seriously influence motor performance and operation reliability [8][9]. So it is significant to study the effect of harmonics on the motor performance.…”

Section: Introductionmentioning

confidence: 99%

Research on the influence of driving harmonic on electromagnetic field and temperature field of permanent magnet synchronous motor

Qiu

et al. 2017

Archives of Electrical Engineering

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At present, the drivers with different control methods are used in most of permanent magnet synchronous motors (PMSM). A current outputted by a driver contains a large number of harmonics that will cause the PMSM torque ripple, winding heating and rotor temperature rise too large and so on. In this paper, in order to determine the influence of the current harmonics on the motor performance, different harmonic currents were injected into the motor armature. Firstly, in order to study the influence of the current harmonic on the motor magnetic field, a novel decoupling method of the motor magnetic field was proposed. On this basis, the difference of harmonic content in an air gap magnetic field was studied, and the influence of a harmonic current on the air gap flux density was obtained. Secondly, by comparing the fluctuation of the motor torque in the fundamental and different harmonic currents, the influence of harmonic on a motor torque ripple was determined. Then, the influence of different current harmonics on the eddy current loss of the motor was compared and analyzed, and the influence of the drive harmonic on the eddy current loss was obtained. Finally, by using a finite element method (FEM), the motor temperature distribution with different harmonics was obtained.

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“…In [20], Wang assessed the performance of fractional-slot tubular-linear PM machines that cancel the most undesirable space harmonics in a simple and cost-effective manner. He proposed a topology with a slot-pole combination (N s , 2p)= (18, 10) which is based on the one having (N s , 2p)=(9, 10) with a special winding configuration.…”

Section: Introductionmentioning

confidence: 99%

Feature Investigation of a T-LPMSM Following the Selection of Its Slot-Pole Combination

Souissi

Abdennadher

Masmoudi

et al. 2017

IEEE Trans. on Ind. Applicat.

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This paper investigates the no-load and the on-load behaviour of a fractional-slot tubular-linear permanent magnet synchronous machine (T-LPMSM). The study is initiated by the selection of the machine slot-pole combination. To do so, a formulation of the air gap flux density, based on the solution of the magnetic potential vector equation in the air gap and in the PM regions, is derived. The electromagnetic model allows the prediction of the phase back-EMFs and of the cogging force. The effect of the slot-pole combination on these features is then considered to the aim of the optimal selection of the slot per pole and per phase. A case study considering the optimized slot per pole and per phase number is treated where the analyticallypredicted no-load features are validated by finite element analysis (FEA). The investigation is extended to the on-load characteristic which is predicted by FEA and is validated by experiments. Index Terms-fractional-slot tubular linear PM synchronous machines; air gap flux density distribution; no-load features; onload features; finite element analysis; experimental validation. 0093-9994 (c)

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Performance evaluation of fractional-slot tubular permanent magnet machines with low space harmonics

Cited by 4 publications

References 6 publications

Resonant Modes of a Linear Permanent Magnet Vibratory Motor

Resonant Modes of a Linear Permanent Magnet Vibratory Motor

Research on the influence of driving harmonic on electromagnetic field and temperature field of permanent magnet synchronous motor

Feature Investigation of a T-LPMSM Following the Selection of Its Slot-Pole Combination

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