Analysis of Direct-On-Line Synchronous Reluctance Machine Start-Up Using a Magnetic Field Decomposition

Tampio, Juha; Kansakangas, Tero; Suuriniemi, Saku; Kolehmainen, J.; Kettunen, Lauri; Ikaheimo, J.

doi:10.1109/tia.2016.2642891

Cited by 36 publications

(10 citation statements)

References 14 publications

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“…The torque region S 3 RM machine can be represented into three unique stages: transient, subtransient and steady state (synchronization). 28 In the transient stage, the speed is low, and the machine consumes a huge input current. So, cage torque (asynchronous torque or induction torque) delivered by the rotor cage is high.…”

Section: Discussion On Cage and Reluctance Torquementioning

confidence: 99%

Self‐start synchronous reluctance motor new rotor designs and its performance characteristics

Ganesan

Lenin

2019

Int Trans Electr Energ Syst

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Summary Self‐start (often called line start) synchronous reluctance motor (a type of synchronous motor) designed with different rotor structures have been analyzed and compared. The torque, output power, rotor mass, and efficiency are calculated through theoretical study. A genetic algorithm is performed to attain optimal machine parameters. The flux distribution, effect on the inductances, starting torque, average torque, power factor, efficiency, and torque ripple are completely examined by the numerical study. The energy consumption comparison of self‐start synchronous reluctance motor and induction motor are calculated. Further, a study on the effects of end‐ring resistance is discussed for starting and steady‐state conditions. Experimental results reveal that the fabricated high efficient rotor structure is closely correlated with the numerical and theoretical studies.

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Section: Discussion On Cage and Reluctance Torquementioning

confidence: 99%

Self‐start synchronous reluctance motor new rotor designs and its performance characteristics

Ganesan

Lenin

2019

Int Trans Electr Energ Syst

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“…The start‐up region of a DOL‐SynRM machine can be divided into three different phases: (a) transient (inrush), (b) subtransient (oscillation), and (c) steady state (synchronization) . During transient period, from the electromagnetic torque waveform, one can understand that starting torque of S1 is 7.79% and 10.52% higher than S2 and S4, respectively, due to higher rotor resistance, which is shown in Figure .…”

Section: Finite Element Analysismentioning

confidence: 97%

Single‐phase direct‐on‐line synchronous motor for a specific application in comparison with an induction motor

Ganesan

Lenin

2019

Int Trans Electr Energ Syst

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Summary The efficiency of the motor is of paramount importance during selection and operation as well as energy consumption. In countries like India, international efficiency class (IE2) is versatile in use. Prominent efficiency improvements can produce very large energy savings across the country. Induction motors (IMs) are widely used for pump applications in India. IM exhibits high rotor (I2R) losses due to the presence of rotor current. This results in less efficient, more energy consumption compared with energy‐efficient motors. Energy‐efficient motor such has single phase direct‐on‐line synchronous reluctance motor (DOL‐SynRM) would be a right alternative for IM due to the absence of rotor current. DOL‐SynRM has been designed, optimized, and tested for a centrifugal pump application. Initially, single phase SynRM with capacitor start and capacitor run is modeled using equivalent circuit parameters and simultaneously simulated using MATLAB. The machine parameters like rib width, length, and thickness are optimized using genetic algorithm technique. The optimized rotor structures are taken to numerical analysis platform for performance prediction. The flux distribution, moment of inertia, air gap flux density, the effect on the inductances, starting torque, average torque, and torque ripple are thoroughly investigated using this analysis. The high‐efficiency rotor structure is fabricated and configured with a centrifugal pump. Experimental results reveal that the overall system efficiency has been improved compared with the existing induction motor. Moreover, thermal analysis is carried out for two types of frame structures (conventional and proposed) to study the hot spot in the proposed motor.

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“…In asynchronous speed, the rotor current is generated by the slip speed that is the relative speed between the synchronous speed and the rotor speed. Similar to the operation principle of IMs, the Energies 2020, 13,384 3 of 15 rotor current provides the required magnetic torque for the speed to approach synchronous speed. This magnetic torque is expressed as follows and is the same for IMs [33]:…”

Section: Asynchronous Operationmentioning

confidence: 99%

Study on Line-Start Permanent Magnet Assistance Synchronous Reluctance Motor for Improving Efficiency and Power Factor

Kim

Park

Liu³

et al. 2020

Energies

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In order to improve the efficiency, a line-start synchronous reluctance motor (LS-SynRM) is studied as an alternative to an induction motor (IM). However, because of the saliency characteristic of SynRM, LS-SynRM have a limited power factor. Therefore, to improve the efficiency and power factor of electric motors, we propose a line-start permanent magnet assistance synchronous reluctance motor (LS-PMA-SynRM) with permanent magnets inserted into LS-SynRM. IM and LS-SynRM are selected as reference models, whose performances are analyzed and compared with that of LS-PMA-SynRM using a finite element analysis. The performance of LS-PMA-SynRM is analyzed considering the position and length of its permanent magnet, as well as its manufacture. The final model of LS-PMA-SynRM is designed for improving the efficiency and power factor of electric motors compared with LS-SynRM. To verify the finite element analysis (FEA) result, the final model is manufactured, experiments are conducted, and the performance of LS-PMA-SynRM is verified.

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Analysis of Direct-On-Line Synchronous Reluctance Machine Start-Up Using a Magnetic Field Decomposition

Cited by 36 publications

References 14 publications

Self‐start synchronous reluctance motor new rotor designs and its performance characteristics

Self‐start synchronous reluctance motor new rotor designs and its performance characteristics

Single‐phase direct‐on‐line synchronous motor for a specific application in comparison with an induction motor

Study on Line-Start Permanent Magnet Assistance Synchronous Reluctance Motor for Improving Efficiency and Power Factor

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