Nonlinear Analytical Model of Eccentric Synchronous Reluctance Machines Considering the Iron Saturation and Slotting Effect

Mahmoud, Hanafy

doi:10.1109/tia.2017.2666085

Cited by 25 publications

(20 citation statements)

References 23 publications

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“…A wide investigation of the theoretical models of both REL and PMAREL machines is presented in [11], [12], [23], and [13]. Those models are general and valid for different stator winding arrangements, number of poles, and number of slots.…”

Section: Theoretical Analyses Literature Reviewmentioning

confidence: 99%

“…It has been proven that the analysis presented in [11] and [23] works for any end angles of the rotor flux-barriers. As it can be noted in [13], the machine non-linearity, as the stator slotting effect and the magnetic saturation of the motor iron are considered analytically. Then, the FE and the experimental validation of the theoretical analyses is reported in [13].…”

Section: Theoretical Analyses Literature Reviewmentioning

confidence: 99%

“…As it can be noted in [13], the machine non-linearity, as the stator slotting effect and the magnetic saturation of the motor iron are considered analytically. Then, the FE and the experimental validation of the theoretical analyses is reported in [13]. In addition, this non-linear analytical model is extended to the eccentricity case and again it is validated by the FE analyses and the experimental measurements.…”

Section: Theoretical Analyses Literature Reviewmentioning

confidence: 99%

“…However, the literature is showing that the magnetic performance of the eccentric reluctance (REL) and permanent magnet assisted reluctance (PMAREL) synchronous machines are only marginally investigated in [11]- [13]. Although there are several comparisons between the performance of REL, PMAREL, and SPM synchronous machines, with cylindrical rotor [14], [15] comparison among these machines at different eccentricity cases is missing.…”

Section: Introductionmentioning

confidence: 99%

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Eccentric Reluctance and Permanent Magnet Synchronous Machines Comparison

Mahmoud

Al-Ani

Gerada

2018

IEEE Trans. on Ind. Applicat.

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Abstract-This paper deals with a comparative study between reluctance (REL), permanent magnet assisted reluctance (PMAREL), and surface mounted permanent magnet synchronous machines with rotor eccentricity. Static, dynamic, and combined eccentricity cases are considered. For the sake of generality, this comparison is carried out at different levels of airgap flux density, as different current angles, different permanent magnet (PM) materials, and different number of magnetic poles. Additionally, different stator windings arrangements, i.e, distributed and fractional slot concentrated windings are taken into account. Besides, different rotor geometries of REL and PMAREL machines are included. As a case of study, 36-slot machine is analyzed, considering three flux barriers per pole, however, the study can be applied to any machine geometry.Due to the structural criticality of the rotor iron ribs of the REL machines, the impact of the eccentricity on the mechanical stress acting on those ribs and the deformation of the rotor is studied.

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Section: Theoretical Analyses Literature Reviewmentioning

confidence: 99%

Section: Theoretical Analyses Literature Reviewmentioning

confidence: 99%

Section: Theoretical Analyses Literature Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Eccentric Reluctance and Permanent Magnet Synchronous Machines Comparison

Mahmoud

Al-Ani

Gerada

2018

IEEE Trans. on Ind. Applicat.

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“…These phenomena strongly affect the air-gap flux density distribution [10]- [12]. In fact, some dips appear in the air-gap flux density distribution due to the magnetic reluctance variations in the air-gap caused by the slot openings [13]- [16]. In addition, the magnetic voltage drops, occurring in the stator and rotor iron, limit the magnetic fluxes flowing through the iron parts of the motor.…”

Section: Introductionmentioning

confidence: 99%

Synchronous Reluctance Motor Iron Losses: Considering Machine Nonlinearity at MTPA, FW, and MTPV Operating Conditions

Mahmoud

Bacco

Gerada

2018

IEEE Trans. Energy Convers.

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Synchronous reluctance machine has high flux density fluctuations in the iron due to the high harmonics results from the rotor anisotropy. Thus, an accurate computation of the iron losses is of paramount importance, especially during the design stage. In this paper, a non-linear analytical model considering the magnetic iron saturation and the slotting effect is proposed. The model estimates accurately the iron losses at a wide range of operating speed. In addition, the accuracy of the non-linear model when the machine is highly saturated, i.e. when it works along the MTPA trajectory, is presented and verified. The model presented is general and can be applied to other configurations. A 36-slot four-pole machine, with three flux-barriers per pole is considered as a case study. Finite element analysis is used to validate the results achieved by means of the non-linear analytical model. Furthermore, an experimental setup is built to validate the simulation results.

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