A Snubberless Solid-State Tap Changer for Permanent Magnet Synchronous Motors

Im, Seong-Hwan; Gu, Bon-Gwan

doi:10.1109/tpel.2020.2988933

Cited by 15 publications

(1 citation statement)

References 14 publications

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“…The switching transient (torque, current, and/or voltage pulsations), which might damage the stator windings or inverter, is another drawback of this method. Several research [33][34][35][36] have addressed this issue and proved the feasibility of winding changeover during machine operation. In addition, it has been shown that the high-pulsations in voltage or current can be eliminated by implementing a zero-crossing voltage or current control method [37], [38].…”

Section: Introductionmentioning

confidence: 99%

Improving the Flux-Weakening Capability of Interior Permanent Magnet Machines by Number of Turns Changing Methodology

Gündoğdu

2022

Turkish Journal of Science and Technology

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Bu çalışmada, sınırlı akı zayıflatma (AZ) kapasitesi ve verimi aynı anda arttırabilmek için farklı sipir sayılarına sahip birbirinden izole iki adet sargısı olan bir gömülü tip kalıcı mıknatıslı (IPM) makina geliştirilmiştir. Akı ayarlayabilme aralığı, AZ kapasitesini düşüren sınırlı maksimum inverter gerilimi ve yüksek manyetik doygunluk nedeniyle sınırlanmaktadır. Kısıtlı AZ kabiliyetini geliştirmek için, ana sargıya göre daha düşük sipir sayısına sahip yardımcı bobinlerin sistematik olarak anahtarlanması ile akı bağlantısının azalmasını sağlayan benzersiz bir sarım-anahtarlama konsepti tanıtılmıştır. Sargı topolojileri, tasarım hususları, AZ ilkesi ve hesaplamaları tümüyle ele alınmıştır. Önerilen AZ kapasitesi geliştirme stratejisinin uygulanabilirliğini doğrulamak için, çeşitli sargı topolojilerine sahip IPM makinelerinin kararlı durum ve AZ performans özelliklerini belirlemek için 2-boyutlu sonlu elemanlar yöntemine (SEY) ve MatLab kodlarına dayalı bir ortak simülasyon prosedürü kullanılmıştır. Klasik ve önerilen IPM makinalarının tüm kararlı durum ve AZ performans özellikleri nicel olarak karşılaştırılmıştır. Ayrıca, bu çalışmada sağlanan analitik ve sayısal hesaplamaların doğruluğunu sağlamak için, orijinal Toyota Prius 2010 IPM makinasının öngörülen verimlilik haritası, sağlanan verimlilik ölçümleri kullanılarak doğrulanmıştır.

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Section: Introductionmentioning

confidence: 99%

Improving the Flux-Weakening Capability of Interior Permanent Magnet Machines by Number of Turns Changing Methodology

Gündoğdu

2022

Turkish Journal of Science and Technology

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E‐Gear Functionality Based on Mechanical Relays in Permanent Magnet Synchronous Machines

Verkroost,

Demeyer,

Soltani Gohari

et al. 2024

IET Electrical Systems in Transportation

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Permanent magnet synchronous machines (PMSMs) are still the first choice for use in electric vehicles, due to their unparalleled efficiency and power density. However, they suffer from an inherently limited speed range. As field weakening or the addition of a mechanical gearbox deteriorates the efficiency of the drive, it is suggested in this paper to equip the drive with reconfiguration switches, giving rise to a so‐called e‐gear. The switches—which are implemented by means of mechanical relays—allow to change the winding connection of the electric machine from a series to a parallel connection and hence to double its efficient speed range. Simulations and experimental results on a 4‐kW axial‐flux PMSM confirm the feasibility of the concept and prove that the reconfiguration can be conducted in less than 35 ms.

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Improvement of the Constant-Power Speed Range of Surface-Permanent Magnet Machine Using Winding Switching

2021

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In this study, a cumulative/differential winding switching method is proposed for the extended constant power operation (CPO) of a surface-permanent magnet (SPM) machine. In this method, the threephase winding of the machine is divided into two equal sub-phase sets, and field weakening is realized by switching the interconnections between the sets. The field-weakening ratio depends on the shift angle between the two sub-phase sets. Hence, it is possible to adjust this angle to obtain a constant power speed range (CPSR). The dependence of the CPO possibility of the proposed winding switching method on the shift angle is analyzed. The analytical requirement for the CPO is formulated, and an algorithm for choosing an optimal winding layout is proposed. The winding switching method is then implemented on a four-pole 24slotted surface-permanent magnet synchronous machine, and the stator winding is changed according to the CPO requirement. The finite element modeling and experimental results verify the extension of the CPSR to four per unit (pu), using the proposed winding switching method with a suitable shift angle. Hence, this method is suitable for constant-power applications, such as traction and electric vehicles.INDEX TERMS Field-weakening, constant power speed range, permanent magnet machines, winding reconfiguration, winding switching.

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A Snubberless Solid-State Tap Changer for Permanent Magnet Synchronous Motors

Cited by 15 publications

References 14 publications

Improving the Flux-Weakening Capability of Interior Permanent Magnet Machines by Number of Turns Changing Methodology

Improving the Flux-Weakening Capability of Interior Permanent Magnet Machines by Number of Turns Changing Methodology

E‐Gear Functionality Based on Mechanical Relays in Permanent Magnet Synchronous Machines

Improvement of the Constant-Power Speed Range of Surface-Permanent Magnet Machine Using Winding Switching

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