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Bo Cheng, Shengzhao Pang, Huanyu Ou, Zeyan Hu and Zhaoyong Mao
Underwater vehicles have been widely used in marine exploration and development. A contra-rotating propeller (CRP) can improve propulsion efficiency, eliminate the roll moment of the propeller acting on underwater vehicles, and significantly improve the ...
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Vladimir Dmitrievskii, Vadim Kazakbaev and Vladimir Prakht
Due to the high cost and the predicted shortage of rare earth elements in the near future, the task of developing energy-efficient electric machines without rare earth magnets is of great importance. This article presents a comparative analysis of optimi...
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Morena Petrini, Margherita Tumedei, Alessandro Cipollina, Simonetta D?Ercole, Maria Stella Di Carmine, Adriano Piattelli, Marco Re and Giovanna Iezzi
(1) Background: Recently, novel dental implants that are characterized by different levels of surface roughness in the distinct parts of the fixture?s body have been introduced in the market. These surface characteristics could affect the primary stabili...
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Sungwoo Chang, Noboru Niguchi, Je-Hoon Lee and Katsuhiro Hirata
In electric motors, the use of rare-earth magnets has been increasing rapidly. A stronger magnet force of the magnet enables the motor?s higher performance, resulting in the most high-performance motors generally using rare-earth magnets. However, these ...
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Claudio Bianchini, Giovanni Franceschini and Ambra Torreggiani
This paper proposes an optimized flux weakening (FW) control strategy for interior permanent-magnet synchronous electric motor to address the critical issues that could occur under torque setpoint transition in flux weakening region, due, for example, to...
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Meng Guo, Cheng Liu, Qingdong Yan, Zhifang Ke, Wei Wei and Juan Li
Hydraulic torque converter is widely used in transmission units as it is able to provide variable speed and torque ratio, isolate vibration, and absorb shock. The pursuit of a highly packed power unit requires a high capacity/speed torque converter, cons...
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Mohammad Nasim Imtiaz Khan and Swaroop Ghosh
Several promising non-volatile memories (NVMs) such as magnetic RAM (MRAM), spin-transfer torque RAM (STTRAM), ferroelectric RAM (FeRAM), resistive RAM (RRAM), and phase-change memory (PCM) are being investigated to keep the static leakage within a toler...
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Udochukwu B. Akuru, Maarten J. Kamper
The China-based monopoly of high-energy permanent magnet materials used in modern wind generators impact the economic viability and local content value of most wind turbines installed in South Africa, especially large installations. It is possible to des...
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Mustafa E. Amiryar, Keith R. Pullen and Daniel Nankoo
Energy storage systems (ESS) are key elements that can be used to improve electrical system efficiency by contributing to balance of supply and demand. They provide a means for enhancing the power quality and stability of electrical systems. They can enh...
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Bayu Praharsena, Era Purwanto, Arma Jaya, Muhammad Rizani Rusli, Handri Toar, Ridwan wk
Pág. 168 - 184
The operation of induction motors with high performance contributes significantly to the global energy savings but hysteresis loss is one of the factors causing decreased performance. Stator flux density (B) and magnetic field intensity (H) must be plott...
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