Design and rotor shape modification of a multiphase high speed permanent magnet assisted synchronous reluctance motor for stress reduction

Tarek, Tawhid Bin; Choi, Seungdeog

doi:10.1109/ecce.2017.8096902

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…A bench-marked five-phase PMaSynRM, specially designed for high speed operation [80] is used for the initial simulations. The machine model takes the same form as Table. 2.1.…”

Section: Proposed Model Predictive Control Algorithm For Speed Controlmentioning

confidence: 99%

Model Predictive Control of Five-Phase Permanent Magnet Assisted Synchronous Reluctance Motor

Dharmasena

Choi

2019

2019 IEEE Applied Power Electronics Conference and Exposition (APEC)

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“…A bench-marked five-phase PMaSynRM, specially designed for high speed operation [80] is used for the initial simulations. The machine model takes the same form as Table. 2.1.…”

Section: Proposed Model Predictive Control Algorithm For Speed Controlmentioning

confidence: 99%

Model Predictive Control of Five-Phase Permanent Magnet Assisted Synchronous Reluctance Motor

Dharmasena

Choi

2019

2019 IEEE Applied Power Electronics Conference and Exposition (APEC)

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“…One of these multiphase machines, is the five-phase permanent magnet assisted synchronous reluctance motors (5phase PMa-SynRMs). These machines have the inherent characteristics of high torque-inertia ratio, rapid control response, high power factor, high efficiency, fault-tolerant aptitude due to the greater number of phases available along with high-power density [4].…”

Section: Introductionmentioning

confidence: 99%

Encoderless Five-phase PMa-SynRM Drive System Based on Robust Torque-speed Estimator with Super-twisting Sliding Mode Control

Aziz

Khan

2023

Trans. Electr. Mach. Syst.

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In this paper, a robust torque speed estimator (RTSE) for linear parameter changing (LPC) system is proposed and designed for an encoderless five-phase permanent magnet assisted synchronous reluctance motor (5-phase PMa-SynRM). This estimator is utilized for estimating the rotor speed and the load torque as well as can solve the speed sensor fault problem, as the feedback speed information is obtained directly from the virtual sensor. In addition, this technique is able to enhance the 5-phase PMa-SynRM performance by estimating the load torque for the real time compensation. The stability analysis of the proposed estimator is performed via Schur complement along with Lyapunov analysis. Furthermore, for improving the 5phase PMa-SynRM performance, five super-twisting sliding mode controllers (ST-SMCs) are employed with providing a robust response without the impacts of high chattering problem. A super-twisting sliding mode speed controller (ST-SMSC) is employed for controlling the PMa-SynRM rotor speed, and four super-twisting sliding mode current controllers (ST-SMCCs) are employed for controlling the 5-phase PMa-SynRM currents. The stability analysis and the experimental results indicate the effectiveness along with feasibility of the proposed RTSE and the ST-SMSC with ST-SMCCs approach for a 750-W 5-phase PMa-SynRM under load disturbance, parameters variations, single open-phase fault, and adjacent two-phase open circuit fault conditions.

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“…Because of the existence of a high number of blank spaces in the rotor lamination of SynRMs, we should pay particular attention to validating the mechanical robustness of the rotor for high torque and high-speed applications Babetto et al (2018), Tarek and Choi (2017). A study on rotor shape optimization in SynRMs considering mechanical stress analysis of the rotor under high-speed operation was presented by Tarek and Choi (2017). It was mentioned that adding mini flux-barrier layers in each of the rotor flux-barrier layers can reduce stress significantly.…”

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 and rotor shape modification of a multiphase high speed permanent magnet assisted synchronous reluctance motor for stress reduction

Cited by 5 publications

References 11 publications

Model Predictive Control of Five-Phase Permanent Magnet Assisted Synchronous Reluctance Motor

Model Predictive Control of Five-Phase Permanent Magnet Assisted Synchronous Reluctance Motor

Encoderless Five-phase PMa-SynRM Drive System Based on Robust Torque-speed Estimator with Super-twisting Sliding Mode Control

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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