Model of the multipolar engine with decreased cogging torque by asymmetrical distribution of the magnets

Goryca, Z.; Paduszynski, Kamil P.; Pakosz, Artur

doi:10.1515/phys-2018-0008

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…The design and development of high-performance BLDC motors for various applications are given in [136]. The technology used to develop the design optimum balanced solution of various factors like cost, power density, torque density, max speed, efficiency, simplicity for ease in manufacturing, etc., are discussed.…”

Section: Design Platform For Bldc Motormentioning

confidence: 99%

A Review of BLDC Motor: State of Art, Advanced Control Techniques, and Applications

et al. 2022

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Brushless direct current (BLDC) motors are mostly preferred for dynamic applications such as automotive industries, pumping industries, and rolling industries. It is predicted that by 2030, BLDC motors will become mainstream of power transmission in industries replacing traditional induction motors. Though the BLDC motors are gaining interest in industrial and commercial applications, the future of BLDC motors faces indispensable concerns and open research challenges. Considering the case of reliability and durability, the BLDC motor fails to yield improved fault tolerance capability, reduced electromagnetic interference, reduced acoustic noise, reduced flux ripple, and reduced torque ripple. To address these issues, closed-loop vector control is a promising methodology for BLDC motors. In the literature survey of the past five years, limited surveys were conducted on BLDC motor controllers and designing. Moreover, vital problems such as comparison between existing vector control schemes, fault tolerance control improvement, reduction in electromagnetic interference in BLDC motor controller, and other issues are not addressed. This encourages the author in conducting this survey of addressing the critical challenges of BLDC motors. Furthermore, comprehensive study on various advanced controls of BLDC motors such as fault tolerance control, Electromagnetic interference reduction, field orientation control (FOC), direct torque control (DTC), current shaping, input voltage control, intelligent control, drive-inverter topology, and its principle of operation in reducing torque ripples are discussed in detail. This paper also discusses BLDC motor history, types of BLDC motor, BLDC motor structure, Mathematical modeling of BLDC and BLDC motor standards for various applications.INDEX TERMS BLDC motor, torque ripple, current shaping techniques, controlling input voltage, direct torque control, drive-inverter topology, field orientation control, motor design, fault tolerance control and electromagnetic interference reduction.

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Section: Design Platform For Bldc Motormentioning

confidence: 99%

A Review of BLDC Motor: State of Art, Advanced Control Techniques, and Applications

et al. 2022

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“…The simulation models [18][19][20][21] were developed from the software FEMM 4.1 library. We selected materials used for simulation and defined the areas containing coils.…”

Section: Simulation Testsmentioning

confidence: 99%

Impact of Selected Methods of Cogging Torque Reduction in Multipolar Permanent-Magnet Machines

Goryca

Różowicz

et al. 2020

Energies

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This paper focuses on the matter of cogging torque reduction by combining various methods of cogging torque minimization. Due to the high costs of prototype construction, cogging torque is minimized during the design phase by using numerical methods, while computer simulations are used to find a magnetic circuit arrangement for which the cogging torque has the smallest possible value. Cogging torque occurs as a result of combined impact of the magnetic field of a permanent magnet located at rotor and stator with variable magnetic conductivity depending on an angle of rotation. It is a pulsating torque and occurs permanently during machine operation, impacting the operation of the entire device cooperating with the electric machine and causing vibrations, tension, and noise. It results in braking torque and subsequent power losses and leads to faster wear and tear of machine structural elements. High cogging torque values cause problems with rotational speed adjustment. In the case of electric generators used in wind power plants, it impedes the start-up of power plants at high wind speeds. Considering the above, the reduction of cogging torque in permanent-magnet machines is extremely important.

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“…In fact, those methods for cogging torque reduction can be classified into two main groups: Machine-based and control-based. Optimization of cogging torque can be accomplished by skewing stator slots or rotor magnets, injection the harmonic current, changing the embrace and offset of the magnet, designing a fractional slot, and adding additional slots or teeth [11,[14][15][16][17]. In terms of control method, the torque harmonic spectrum of a 12/10 pole machine is investigated for the optimization of the cogging torque.…”

Section: Introductionmentioning

confidence: 99%

Cogging Torque Minimization Using Skewed and Separated Magnet Geometries

et al. 2020

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Çalışmada, 2,5 kW gücünde 14 kutuplu, 84 oluklu sabit mıknatıslı senkron generatörün (SMSG) analitik tasarımı, analizi ve optimizasyonu gerçekleştirilmiştir. Bu tasarıma ait verim, tork, vuruntu torku ve manyetik akı yoğunluğu gibi performans özelikleri değerlendirilmiştir. Ardından mıknatıs geometrisinin vuruntu torkuna etkisini incelemek amacıyla ilgili generatörün 3 boyutlu modeli çıkartılmıştır. Bu bağlamda bölünmüş ve kaykı/çarpıklık (skew) verilmiş mıknatıs yapılarının etkileri araştırılmıştır. İlk tasarımda mıknatıs tek parça modellenmiş ve vuruntu torkunun etkin değeri 436,75 mNm olarak bulunmuştur. İkinci tasarımda mıknatıs yüzeyi boyunca belli ölçüde çarpık bir yarık açılmış ve bu işlem vuruntu torkunu 434,58 mNm değerine düşürmüştür. Diğer tasarımda, birinci tasarımdaki mıknatıs iki parçaya bölünmüş ve bölünen mıknatıslar çarpık şekilde tekrar birleştirilmişlerdir. Böylece vuruntu torkunun değeri 159,60 mNm olarak bulunmuştur. Son olarak, son modeldeki mıknatıs geometrisine belli ölçülerde iki tane yarık açılarak vuruntu torku 89,95 mNm'e kadar düşürülmüştür. Elde edilen sonuçlardan, son tasarımın, ilk tasarıma kıyasla vuruntu torku değerinde %80'e varan bir iyileşme sağladığı sonucuna varılmıştır.

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Model of the multipolar engine with decreased cogging torque by asymmetrical distribution of the magnets

Cited by 8 publications

References 3 publications

A Review of BLDC Motor: State of Art, Advanced Control Techniques, and Applications

A Review of BLDC Motor: State of Art, Advanced Control Techniques, and Applications

Impact of Selected Methods of Cogging Torque Reduction in Multipolar Permanent-Magnet Machines

Cogging Torque Minimization Using Skewed and Separated Magnet Geometries

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