Optimization of Flux Barriers of Line-start Synchronous Reluctance Motors for Transient- and Steady-state Operation

Boroujeni, Samad Taghipour; Haghparast, Mortaza; Bianchi, Nicola

doi:10.1080/15325008.2014.984819

Cited by 24 publications

(19 citation statements)

References 19 publications

(30 reference statements)

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“…u is the length of the barrier perpendicular to q‐ axis, and v is the length parallel to d‐ axis. The barrier angle is denoted by m , ranging between 130° and 146° (electrical degree) . The tangential rib is denoted as t rib .…”

Section: Overview Of Rotor Structuresmentioning

confidence: 99%

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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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Section: Overview Of Rotor Structuresmentioning

confidence: 99%

“…The flux that crosses the air gap flows in three paths in the rotor. The first portion goes through flux barriers, the second part streams through the rotor ribs, and the third part flows through the rotor iron body . The first and second portion of q‐ axis flux depends on the shape of the flux barriers, which is investigated.…”

Section: Finite Element Analysismentioning

confidence: 99%

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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“…e is the length of the barrier perpendicular to q axis, and f is the length parallel to d axis. The p signifies the barrier angle, which is limits between 130° and 146° (electrical degree) . The radial rib and tangential rib are indicated as r r and t r , respectively.…”

Section: Rotor Structures—an Overviewmentioning

confidence: 99%

“…The p signifies the barrier angle, which is limits between 130°and 146°(electrical degree). 18 The radial rib and tangential rib are indicated as r r and t r , respectively. With increase in r r , q-axis inductance also increases, which thus reduces the output torque.…”

Section: Rotor Structures-an Overviewmentioning

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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“…They have reliable self-starting without need for any kind of start-up procedure; a durable windingless rotor structure; high output power/unit volume; smooth, vibration-free operation; quiet operation; nonzero torque at rest; constant torque; and low inrush current [1][2][3][4][5]. There are also various studies to be found in the literature [6][7][8] on line-start permanent magnet synchronous motors without using the hysteresis ring.…”

Section: Introductionmentioning

confidence: 99%

Design of a self-starting hybrid permanent magnet hysteresis synchronous motor connected directly to the grid

Gedikpınar¹,

Atdogmus²

2017

Turk J Elec Eng & Comp Sci

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Abstract:In this work, a permanent magnet hysteresis synchronous (PMHS) motor was designed to improve the efficiency of the system. The proposed motor is intended for pumping applications, such as submersible pump motors, fire pumps, oil-well pumps, and circulation pumps requiring high-speed operation. The efficiency of the pump system increases depending on the speed of the pump fans. The total efficiency of the pump system is reduced because the load increases exponentially in these types of application systems. The speed is important for the pumping applications in order to improve the efficiency of the pump system. Nowadays, traditional induction motors are widely used in these applications; however, they experience rotor slip when operating under synchronous speed with loaded conditions. The system efficiency is dramatically reduced when the rotor slip is increased by depending on the pump load. The proposed motor can achieve self-starting without any kind of driver for direct connection to the grid. In addition, the proposed motor can be operated at synchronous speed under full load conditions. The designed motor is analyzed by using simulation results, such as the performance of the starting motor at various loads, stator-rotor flux density, and synchronous speed at stand-still.

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Optimization of Flux Barriers of Line-start Synchronous Reluctance Motors for Transient- and Steady-state Operation

Cited by 24 publications

References 19 publications

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

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

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

Design of a self-starting hybrid permanent magnet hysteresis synchronous motor connected directly to the grid

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