An analytical model for an N-flux barrier per pole permanent magnet-assisted synchronous reluctance motor

Nikbakhtian, B.; Talebi, Salman; Niazi, P.; Toliyat, H.A.

doi:10.1109/iemdc.2009.5075195

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…The risk of unsuccessful synchronization because of irregular cage configuration and lack of any theoretical approach in LS-SynRM design were the strong motivations behind this work. The proposed model in [1,2] was used to consider the effect of rotor reluctance. Results obtained from this model were combined into the cage.…”

Section: Discussionmentioning

confidence: 99%

“…An analytical method for investigation of magnetic field distribution in a reluctance rotor on which several flux barriers might be incorporated is required to be established as a primary step toward harmonic cusps calculation. In here, the well-known analytical approach firstly proposed in [1] and later developed in other papers such as [2] is used. A general reluctance rotor with two hyperbolic-line flux barriers per pole and a stator belonged to a reference NEMA-213 frame IM is considered.…”

Section: Fiield Analysis Over the Reluctance Rotormentioning

confidence: 99%

“…An analytical approach to achieve this goal is proposed in this paper in order to predict the probable cusps created after embedding the cage into the reluctance rotor. The theoretical model derived in [1,2] is used to calculate field distribution through the reluctance rotor. In the last section, all of the results obtained by the proposed approach is compared with FEA simulation results to verify the functionality of the proposed method.…”

Section: Introductionmentioning

confidence: 99%

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An analytical approach for determining harmonic cusps and torque dips in line start synchronous reluctance motors

Negahdari

Sundaram

Toliyat

2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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Excellence of line start synchronous reluctance motors (LS-SynRM) such as their high efficiency amongst other types of line start motors necessitates the existence of analytical methods in their design. The start-up period of these motors is of high importance and regarding this, the cage design needs to be discussed thoroughly since the squirrel cage is responsible for speeding up the motor to reach at synchronism. One of the issues in this sense is the rich harmonic content of the air-gap MMF arising from irregular bars configuration which afterwards could lead to creation of the torque dips in the torque-speed characteristic of the machine and making it incapable of synchronization under load. An analytical approach to calculate these harmonic effects while also considering the reluctance rotor contribution on them is proposed in this paper. This scheme starts from the stator winding configuration as a known parameter, obtaining the air gap MMF due to only the stator magnetic field, calculating the current and voltages induced through the rotor bars considering the effect of saliency using the model proposed in [1, 2]. Next, harmonic contribution of the rotor cage in the air gap MMF is derived. Finally, probable harmonic cusps and consequently torque dips is found in the torquespeed characteristic of the motor which is helpful in anticipating the synchronization capability under various loads. The results have been verified with a sample 4-pole, two flux barriers per pole LS-SynRM which suffers crawling due to the existence of the torque dips in its torque-speed characteristic. All simulations have been done by finite element analysis (FEA) software and a comprehensive program was written in Matlab to implement the proposed algorithm.

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Section: Discussionmentioning

confidence: 99%

Section: Fiield Analysis Over the Reluctance Rotormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An analytical approach for determining harmonic cusps and torque dips in line start synchronous reluctance motors

Negahdari

Sundaram

Toliyat

2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…Little has been done however to apply winding function theory to machines with permanent magnets, one example of which is found in [15]. Its usefulness lies in the fact that it can take into account geometrical variations of the machines and be used to simulate transient performance.…”

Section: Winding Function Theory For the Magnetic Gearmentioning

confidence: 98%

Analysis of the Concentric Planetary Magnetic Gear With Strengthened Stator and Interior Permanent Magnet Inner Rotor

Frank

Toliyat²

2011

IEEE Trans. on Ind. Applicat.

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102

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Magnetic gears have been proposed as a means of increasing torque density within electromechanical systems, while avoiding problems associated with traditional mechanical gears. While the idea behind magnetic gears goes back to early patents, their study and use in industry has been very limited to date. This study looks into variations of the concentric planetary magnetic gear which could lead to further use. It also investigates applying winding function theory (WFT) to aid in analysis of the gear. The new application of winding function theory is verified with the use of finite element analysis (FEA) as well as a prototype which has been fabricated.Index Terms-Finite element analysis (FEA), magnetic gears, permanent magnets, winding function theory.

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Analysis of the concentric planetary magnetic gear with strengthened stator and interior permanent magnet (IPM) inner rotor

Frank

Toliyat

2010

2010 IEEE Energy Conversion Congress and Exposition

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An analytical model for an N-flux barrier per pole permanent magnet-assisted synchronous reluctance motor

Cited by 8 publications

References 11 publications

An analytical approach for determining harmonic cusps and torque dips in line start synchronous reluctance motors

An analytical approach for determining harmonic cusps and torque dips in line start synchronous reluctance motors

Analysis of the Concentric Planetary Magnetic Gear With Strengthened Stator and Interior Permanent Magnet Inner Rotor

Analysis of the concentric planetary magnetic gear with strengthened stator and interior permanent magnet (IPM) inner rotor

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