Design of an Energy Efficient Line-Start Two-Pole Ferrite Assisted Synchronous Reluctance Motor for Water Pumps

Baka, Srinivas; Sashidhar, S.; Fernandes, B. G.

doi:10.1109/tec.2020.3029110

Cited by 26 publications

(14 citation statements)

References 25 publications

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“…In the latter, the measured results reported a fullload power factor of 0.83, with optimal torque ripple of 29.1%. Though the work reported in [6] improved the power factor and reduced the torque ripple, it also dropped the average torque. Both works in [5] and [6] used a low-cost ferrite magnet.…”

Section: Introductionmentioning

confidence: 96%

“…Though the work reported in [6] improved the power factor and reduced the torque ripple, it also dropped the average torque. Both works in [5] and [6] used a low-cost ferrite magnet. The latter is known to have low remnant flux and cohesive force as compared to rare-earth PM materials.…”

Section: Introductionmentioning

confidence: 96%

“…Although the work in [5] has presented simulation results that reported the full-load power factor of 0.885 for driving constant loads, the analysis focused mostly on economic considerations rather than technical performance of the proposed line-start PM assisted synchronous reluctance motor with ferrite magnet. Furthermore, the work in [6] reported both simulation and measured results of line-start ferrite assisted synchronous reluctance motor for water pump application. In the latter, the measured results reported a fullload power factor of 0.83, with optimal torque ripple of 29.1%.…”

Section: Introductionmentioning

confidence: 99%

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Line-Start Synchronous Reluctance Motor With V-Shaped Rotor Laminations

Muteba

2022

IEEE Access

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A line-start synchronous reluctance motor (LS-SynRM) that meets the IE4 efficiency and has satisfactory starting and synchronizing capabilities while operating with acceptable power factor will find application in constant speed drives. This paper introduces a line-start synchronous reluctance motor with Vshape rotor laminations (LS-SynRM-VSRL). The motor, which has been designed from an IE2-132S4 conventional foot mounted three-phase induction motor NEMA frame, was modeled using the threedimensional (3D) Finite Element Method (FEM), then prototyped and tested for transient, dynamic, and steady-state performance under different load conditions. The Finite Element Analysis (FEA) and measured results of the LS-SynRM-VSRL are compared with those of a conventional line-start synchronous reluctance motor (CLS-SynRM). The results evidenced that both LS-SynRMs achieved successful synchronization on no-load, with the proposed LS-SynRM-VSRL reaching the steady state condition much quicker than the CLS-SynRM. Under steady-state operations, both LS-SynRMs achieved IE4 efficiency, with the proposed LS-SynRM-VSRL reaching an efficiency of 93.6% on full-load, in contrast to the 84.9% that the IE2-132S4 induction motor has achieved under the same loading condition.INDEX TERMS Constant speed drives, dynamic response and transient analysis, experimental measurements, finite element analysis, IE4 efficiency, line-start motor, low torque ripple, steady-state analysis, synchronizing capability, synchronous reluctance motor.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Line-Start Synchronous Reluctance Motor With V-Shaped Rotor Laminations

Muteba

2022

IEEE Access

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“…This material can make PMA-SynRM rotors without bridges and/or centre posts to improve the motor performance. In reference [14], a 2-pole line-start PMA-SynRM was designed for a pump, and the prototype verified that the motor has the advantages of a high efficiency and a high-power factor. References [15,16] calculated the motor Q-axis inductance and D-axis and gave the motor magnetic circuit distribution method.…”

Section: Introductionmentioning

confidence: 99%

A Novel Modular Permanent Magnet-Assisted Synchronous Reluctance Motor

Liu

et al. 2021

IEEE Access

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This paper proposes a novel modular permanent magnet-assisted synchronous reluctance motor (MPMA-SynRM) structure. The rotor is composed of two types of rotor modules that are axially combined. This article analyses and explains the combined angle of the axial assembly of different rotor modules. The MPMA-SynRM rotor module is optimized using a differential evolution algorithm and the MPMA-SynRM space vector diagram is established to give the torque calculation an analytical expression. Whether there is axial magnetic isolation between different rotors is analysed, and various segment numbers, pole arc coefficients, and length ratios are used for different rotor modules to affect the electromagnetic influence of the MPMA-SynRM's cogging torque. Detailed analyses of the MPMA-SynRM loss, efficiency, and permanent magnet demagnetization state are given. The no-load back EMF, power factor, efficiency, eddy current loss, and cogging torque of the MPMA-SynRM with traditional Nd-Fe-B permanent magnet motors and permanent magnet auxiliary synchronous reluctance motors are compared, and a prototype is made to prove the performance of this motor.

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“…Synchronous reluctance motors (SynRMs) are a viable alternative to induction motors (IMs) in variable speed inverter-driven applications (Baka et al , 2021; Cai et al , 2014; Cupertino et al , 2014). They are used in applications in which synchronous speed, high dynamics, wide flux weakening region and fault-tolerant capability are needed (Bacco and Bianchi, 2019; Bianchi et al , 2008; Guan et al , 2016).…”

Section: Introductionmentioning

confidence: 99%

Proposing a sequential iterative method based on a per-unit model for rotor shape optimization in permanent magnet assisted synchronous reluctance motors

Fard

Mirsalim

2022

COMPEL

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Purpose During the design process of synchronous reluctance motors (SynRMs), one crucial step, after its main dimensioning, is optimizing the rotor geometry for maximum average torque and minimum torque ripple. However, because of the complexity of rotor flux-barrier layers geometry, the number of rotor geometrical parameters is high and this step could be quite complex and time-consuming. To obtain a good performance, one needs a robust algorithm to optimize the rotor geometry. The purpose of this paper is to present a sequential iterative method for rotor shape optimization in SynRMs based on the per-unit rotor model to maximize the average torque and minimize the torque ripple. Design/methodology/approach In the presented method, at first, rotor geometrical parameters are classified into several groups based on their geometrical similarities, and then optimization is done on these individual groups iteratively. The method starts with an arbitrary feasible rotor geometry and proceeds to optimize it. Because the method’s performance depends on initial rotor geometry, different cases are studied to investigate the convergence and robustness of the method. The MATLAB software is used to implement the optimization algorithm, and the ANSYS Maxwell software is used for the finite element analysis. Findings The performance of the proposed method is studied on a three-phase 0.75 kW-1,500 rpm permanent magnet assisted SynRM. The results show that the method improves the average torque while reducing the torque ripple. Even if the method starts with an inappropriate initial rotor geometry, it is robust enough and converges within an acceptable number of iterations. Originality/value The value of this paper is in introducing a per-unit rotor model. When the authors optimize the rotor geometry for a specific motor rating, it can be scaled up or down for other ratings with little effort. In this work, the number of rotor poles is four and the number of rotor flux-barrier layers per pole is three. Other combinations could be analyzed in future studies.

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Design of an Energy Efficient Line-Start Two-Pole Ferrite Assisted Synchronous Reluctance Motor for Water Pumps

Cited by 26 publications

References 25 publications

Line-Start Synchronous Reluctance Motor With V-Shaped Rotor Laminations

Line-Start Synchronous Reluctance Motor With V-Shaped Rotor Laminations

A Novel Modular Permanent Magnet-Assisted Synchronous Reluctance Motor

Proposing a sequential iterative method based on a per-unit model for rotor shape optimization in permanent magnet assisted synchronous reluctance motors

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