Analytical modelling and optimisation of line start LSPM synchronous motors

Ghahfarokhi, Mohammadreza Mostafavi; Aliabad, Aliakbar Damaki; Boroujeni, Samad Taghipour; Amiri, Ebrahim; Faradonbeh, Vahid Zamani

doi:10.1049/iet-epa.2019.0644

Cited by 30 publications

(34 citation statements)

References 37 publications

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“…As is evident from (10)- (12), the VCs are calculated from the magnetic flux density. In addition, the magnetic flux density in each region is computed from the VCs, PM and armature currents.…”

Section: Virtual Currentsmentioning

confidence: 99%

“…In the first step, the values of VCs are set to zero and the magnetic flux density in each region is initially obtained. Using the initially calculated magnetic flux density, the VCs are computed based on (9)- (12). In the next step, the magnetic flux density in each region is updated using the recently calculated VCs.…”

Section: Virtual Currentsmentioning

confidence: 99%

“…Although the finite-element method (FEM) is able to consider all the geometrical details of the machine and the non-linear magnetic properties of materials, the computational time is relatively high. Therefore, for the optimal design stage of the machine, analytical methods such as the SD technique [2][3][4][5][6][7], conformal mapping (CM) [8,9], winding function [10,11], magnetic islands [12] and magnetic equivalent circuit (MEC) [1,12] are preferred than the numerical ones such as FEM.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analytical model for slotted stator brushless surface inset permanent magnet machines using virtual current theory

Faradonbeh

Rahideh

Markadeh

2020

IET Electric Power Applications

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A two-dimensional analytical model is presented for predicting the air-gap magnetic flux density due to the permanent magnet (PM) and armature currents in brushless surface inset PM (BSIPM) machines. The virtual current theory is used to model the effects of the stator slots and rotor grooves. In this approach, the BSIPM machine is initially modelled as a machine without any stator slot and rotor groove, and the rotor groove and stator slot effects are modelled by a set of surface currents. By extracting the governing Laplace and Poisson equations and applying the boundary conditions, the magnetic flux density due to the PM and armature current is obtained in different parts of the machine. The accuracy of the proposed analytical model is confirmed by comparing its results with those of the finite-element method and experimental results. The proposed model is also compared with the subdomain analytical model in terms of computational speed and accuracy. Nomenclature A magnetic vector potential, Wb/m B r radial component of magnetic flux density, T B φ tangential component of magnetic flux density, T

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Section: Virtual Currentsmentioning

confidence: 99%

Section: Virtual Currentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analytical model for slotted stator brushless surface inset permanent magnet machines using virtual current theory

Faradonbeh

Rahideh

Markadeh

2020

IET Electric Power Applications

Self Cite

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“…Line-start synchronous machines (LSSMs) are actively studied because they can meet the efficiency of IE4. In addition, a LSSM is direct-on-line (DOL) motor, such as IM, so it does not require an inverter, in which the cost of electric system can be reduced [12][13][14][15][16][17]. LSSM can be classified into two types; line-start permanent magnet synchronous motor (LSPM) and line-start synchronous reluctance motor (LS-SynRM).…”

Section: Introductionmentioning

confidence: 99%

A Study on the Rotor Design of Line Start Synchronous Reluctance Motor for IE4 Efficiency and Improving Power Factor

Kim

Park

et al. 2020

Energies

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As international regulations of motor efficiency are strengthened, the line-start synchronous reluctance motor (LS-SynRM) is being studied to improve the efficiency of the electrical motor in industrial applications. However, in industrial applications, the power factor is also an important performance index, but the LS-SynRM has poor power factor due to the saliency characteristic. In this paper, the rotor design of LS-SynRM is performed to improve the efficiency and power factor. First, the barrier design is performed to improve the efficiency and power factor using the response surface method (RSM). Second, the rotor slot design is performed according to the length of bar for synchronization. Lastly, the rib design is performed to satisfy the power factor and the mechanical reliability. The final model through the design process is analyzed using finite element analysis (FEA), and the objective performance is satisfied. To verify the FEA result, the final model is manufactured, and experiment is performed.

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“…One is a structure in which a secondary conductor bar is embedded on the outer diameter side of the rotor based on the structure of a PMSM. These motors are named line-start type PMSMs (LS-PMSMs) [2][3][4][5][6][7][8][9][10][11][12]. It consists of a combination of an IM and an embedded PMSM.…”

Section: Introductionmentioning

confidence: 99%

Verification of effect of secondary conductor bar on starting characteristics in line‐start type self‐excited wound‐field synchronous motor

Aoyama

Mizuta

Ito

2020

IET Electric Power Applications

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This study clarifies experimentally the effect of the secondary conductor bar on line-start characteristics in a line-start type self-excited wound-field synchronous motor. This motor is based on a brushless wound-field synchronous motor having a rotor winding connected to a diode rectifier circuit. And it has a secondary conductor bar that is independently connected at a pitch of one pole, without end-ring. First, the operation principle of the proposed motor and its magnetic circuit design are described, and then the details of the prototype for principle verification are clarified. Next, when the combination of the connecting of the secondary conductor bar is changed, an experiment of line-starting characteristics and measured rotor field current is demonstrated. Consequently, it was clarified that the influence on the synchronous pull-in, speed ripple, and rotor field current.

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Analytical modelling and optimisation of line start LSPM synchronous motors

Cited by 30 publications

References 37 publications

Analytical model for slotted stator brushless surface inset permanent magnet machines using virtual current theory

Analytical model for slotted stator brushless surface inset permanent magnet machines using virtual current theory

A Study on the Rotor Design of Line Start Synchronous Reluctance Motor for IE4 Efficiency and Improving Power Factor

Verification of effect of secondary conductor bar on starting characteristics in line‐start type self‐excited wound‐field synchronous motor

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