scholarly journals Design of Low-Torque-Ripple Synchronous Reluctance Motor with External Rotor

2017 ◽  
Vol 54 (1) ◽  
pp. 23-30
Author(s):  
L. Lavrinovicha ◽  
J. Dirba ◽  
R. Dobriyan
Keyword(s):  
Magnetic Field ◽  
Torque Ripple ◽  
Numerical Calculations ◽  
Electromagnetic Torque ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Low Torque ◽  
External Rotor

Abstract The paper presents new designs for synchronous reluctance motors that have external rotor (segment-shaped rotor, rotor with additional non-magnetic space to the quadrature axis of the rotor, and rotor with several flux barriers). Impact of the external rotor configuration on the electromagnetic torque and torque ripple is analysed. Electromagnetic torque ripple factor is calculated for each studied motor using the results of magnetic field numerical calculations.

scholarly journals Study of the Synchronous Reluctance Motor Design

2016 ◽  
Vol 53 (4) ◽  
pp. 22-29 ◽  
Author(s):  
J. Dirba ◽  
L. Lavrinovicha ◽  
R. Dobriyan
Keyword(s):  
Magnetic Flux ◽  
Torque Ripple ◽  
Electromagnetic Torque ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Motor Design ◽  
Twofold Decrease ◽  
External Rotor

AbstractThe paper focuses on studying the external-rotor synchronous reluctance motor. The analysis is performed to estimate the influence of the number of stator slots and non-magnetic areas in the rotor (i.e., flux barriers) on the electromagnetic torque and torque ripple of the studied motor. It is concluded that the increase in the number of stator slotsZ= 6 toZ= 18 causes an approximately twofold decrease in the ripple factor, but torque increases by 5 %. Electromagnetic torque will be increased approximately by 24 %, if non-magnetic flux barriers are created in the rotor of the studied synchronous reluctance motor.

scholarly journals Theoretical and Experimental Research of Synchronous Reluctance Motor

2017 ◽  
Vol 54 (5) ◽  
pp. 38-47 ◽  
Author(s):  
R. Dobriyan ◽  
S. Vitolina ◽  
L. Lavrinovicha ◽  
J. Dirba
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Electromagnetic Torque ◽  
The Finite Element Method ◽  
Magnetomotive Force ◽  
Research On Evaluation ◽  
Stator Windings ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Experimental Values

Abstract The paper presents the research on evaluation of accuracy of magnetic field calculations of synchronous reluctance motor in comparison with the results obtained in experiments. Magnetic field calculations are performed with the finite element method to determine values of the magnetic flux and electromagnetic torque according to the current value in motor stator and load angle between the rotor direct-axis and axis of stator magnetomotive force (MMF). Experimental values of magnetic flux and electromagnetic torque are obtained on motor with locked rotor while equivalent direct current is applied to the stator windings. The research shows that the results obtained from the magnetic field calculations coincide well with the experimental data.

Low‐torque ripple design of a ferrite‐assisted synchronous reluctance motor

2016 ◽  
Vol 10 (5) ◽  
pp. 319-329 ◽  
Author(s):  
Massimo Barcaro ◽  
Tomas Pradella ◽  
Ivano Furlan
Keyword(s):  
Torque Ripple ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Low Torque

scholarly journals Metamodels for Optimum Design of Outer-Rotor Synchronous Reluctance Motor

2014 ◽  
Vol 5 (1) ◽  
pp. 34-39
Author(s):  
Ludmila Lavrinovicha ◽  
Roman Dobriyan ◽  
Oskars Onzevs
Keyword(s):  
Optimal Design ◽  
Unit Volume ◽  
Numerical Calculations ◽  
Outer Diameter ◽  
Electromagnetic Torque ◽  
Electromagnetic Parameters ◽  
Synchronous Reluctance Motor ◽  
Comparison Results ◽  
Outer Rotor ◽  
Reluctance Motor

Abstract A new design of synchronous reluctance motor with segment-shaped outer rotor is presented and investigated in this paper. In order to obtain correct recommendations for optimal design of the studied synchronous reluctance motor, analytical relations of motor electromagnetic parameters and geometrical dimensions (also known as metamodels) have been synthesized. Electromagnetic parameters, which have been used for metamodels synthesis, are obtained by means of magnetostatic field numerical calculations with finite element method using software QuickField. The paper includes the analysis of the studied synchronous reluctance motor geometrical parameters (stator outer diameter, height and overlap angle of rotor’s segment-shaped packages) influence on the electromagnetic torque per unit volume. Testing of synthesized metamodels shows that relative difference between the results obtained by numerical calculations and those obtained with the help of synthesized metamodels does not exceed eight percent at experimental points and intermediate points as well. The proposed optimal design of the segment-shaped outerrotor synchronous reluctance motor obtained with the help of synthesized metamodels has been compared with a salient-pole outer-rotor synchronous reluctance motor having ferromagnetic yoke with the same value of the electromagnetic torque. The comparison results of both motors show that the highest value of electromagnetic torque per unit volume can be achieved with the proposed new design of the synchronous reluctance motor with segment-shaped outer rotor.

Design Optimization of Synchronous Reluctance Motor for Low Torque Ripple

2019 ◽  
pp. 53-69
Author(s):  
Andrea Credo ◽  
Andrea Cristofari ◽  
Stefano Lucidi ◽  
Francesco Rinaldi ◽  
Francesco Romito ◽  
...  
Keyword(s):  
Design Optimization ◽  
Torque Ripple ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Low Torque

scholarly journals Design of External Rotor Ferrite-Assisted Synchronous Reluctance Motor for High Power Density

2021 ◽  
Vol 11 (7) ◽  
pp. 3102
Author(s):  
Md. Zakirul Islam ◽  
Seungdeog Choi ◽  
Malik E. Elbuluk ◽  
Sai Sudheer Reddy Bonthu ◽  
Akm Arafat ◽  
...  
Keyword(s):  
Rare Earth ◽  
Permanent Magnets ◽  
Design Procedure ◽  
Lumped Parameter Model ◽  
High Power Density ◽  
Analytical Design ◽  
Synchronous Reluctance Motor ◽  
Lumped Parameter ◽  
Reluctance Motor ◽  
External Rotor

The rare-earth (RE) permanent magnets (PM) have been increasingly adopted in traction motor application. However, the RE PM is expensive, less abundant, and has cost uncertainties due to limited market suppliers. This paper presents a new design of a RE-free five-phase ferrite permanent magnet-assisted synchronous reluctance motor (Fe-PMaSynRM) with the external rotor architecture with a high saliency ratio. In such architecture, the low magnetic coercivity and demagnetization risk of the ferrite PM is the challenge. This limits the number of flux barriers, saliency ratio, and reluctance torque. A precise analytical design procedure of rotor and stator configuration is presented with differential evolution numerical optimizations by utilizing a lumped parameter model. A 3.7 kW prototype is fabricated to validate the proposed idea.

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