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High Torque Density Propulsion Motors
Naval Engineers Journal, 2005The size and weight of electric drive components are primary considerations in their successful integration into various Naval platforms. Direct drive propulsion motors are of particular importance due to their requirement of developing full power at low shaft speed.
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Torque and Power Density of Coaxial Magnetic Gears
2019 II International Conference on High Technology for Sustainable Development (HiTech), 2019In the present work, the recent positive trend in torque and power density of the coaxial magnetic gears is discussed. Timeline of magnetic gears development according to design topology and magnetic materials improvements is presented. Five generations of magnetic gears are recognized according to the torque density limitations.
Valentin Mateev +2 more
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Determination of tidal torques independently of densities
Studia Geophysica et Geodaetica, 1986The components of the tidal torques along the axes of the inertia ellipsoid of a perfectly elastic Earth have been derived quite independently of the density distribution of masses within the Earth. It has been demonstrated that not only the sectorial, but also the tesseral terms in the tidal forming potential are responsible for the tidal deceleration
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Implant micromotion is related to peak insertion torque and bone density
Clinical Oral Implants Research, 2009Abstract Objectives: Measuring peak insertion torque in relation to different bone densities, the present study seeks to determine whether micromotion at the interface is related to primary stability achieved by increasing insertion torque.
TRISI P +5 more
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Realization of High Torque Density Encoderless Servo Drive System
IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019This paper proposes an encoderless servo drive system including high torque density servomotor capable of handling large load, and high response and high accuracy saliency based sensorless drive technology. As an encoderless servomotor, the spoke type Interior Permanent Magnet Synchronous Motor (IPMSM) that is used for a general purpose servomotor is ...
Shinya Morimoto +2 more
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High Power/Torque-Density Devices
2020Mechanical power transmission and handling devices are evaluated according to their power density, or else their torque density if it is not the power that is the issue of primary concern. The combination of high power or torque density with good energy efficiency may collectively be termed high-performance density.
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A magnetic gearbox with an active region torque density of 239Nm/L
2014 IEEE Energy Conversion Congress and Exposition (ECCE), 2014In this paper, a 1:4.25 ratio ferrite magnet and Nd-Fe-B magnet flux-focusing magnetic gearbox with a high pole count is analyzed. A simple parameter sweep analysis is used to show that higher than previously published torque density values are achievable.
Kiran K. Uppalapati +5 more
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Segmented exterior-rotor PMSM for increased torque density
2023 13th International Electric Drives Production Conference (EDPC), 2023Embedded permanent magnets are widely used for electrical machines with interior-rotor. This provides better protection of the magnets and enables the use of an additional reluctance torque for torque density improvements. For external rotors, the use of surface-mounted permanent magnets is common.
Wilfling, Timo +3 more
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Relationship of extremity muscle torque and bone mineral density in postmenopausal women
Maturitas, 1990The purpose of this study was to examine the correlations between the torque of four extremity muscle groups and the bone mineral density (BMD) of the lumbar spine and hip in postmenopausal women. Fifty-six postmenopausal women (means age = 55.4 years, s = 7.1; means height = 162.6 cm, s = 6.4; means weight = 65.9 kg, s = 9.3) served as subjects.
C L, Zimmermann +4 more
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A Rotationally Asymmetric Reluctance Machine With Improved Torque Density
IEEE Transactions on Energy Conversion, 2013Reluctance machines (RM) have desirable features including low rotor and no-load rotational losses. In this paper, a new type of RM is introduced, namely the asymmetrical RM. This machine has higher torque density than a conventional RM and is useful in situations where low rotor and no-load rotational losses are desirable.
Cahya A. Harianto, Scott D. Sudhoff
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