Study on high speed traction drive CVT for aircraft power generation (Analysis of ratio-changing response)

Recent high energy density thin film material development has led to an increased interest in pyroelectric energy conversion. Using state-of-the-art lead-zirconate-titanate piezoelectric films capable of withstanding high electric fields we previously demonstrated single cycle energy conversion densities of 4.28 J/cm3. While material improvement is ongoing, an equally challenging task involves developing the thermal and thermodynamic process though which we can harness this thermal-to-electric energy conversion capability. By coupling high speed thermal transients from pulsed heating with rapid charge and discharge cycles, there is potential for achieving high energy conversion efficiency. We briefly present thermodynamic equivalent models for pyroelectric power generation based on the traditional Brayton and Ericsson cycles, where temperature-pressure states in a working fluid are replaced by temperature-field states in a solid pyroelectric material. Net electrical work is then determined by integrating the path taken along the temperature dependent polarization curves for the material. From the thermodynamic cycles we identify the necessary cyclical thermal conditions to realize net power generation, including a figure of merit, rEC, or the electrocaloric ratio, to aid in guiding generator design. Additionally, lumped transient analytical heat transfer models of the pyroelectric system with pulsed thermal input have been developed to evaluate the impact of reservoir temperatures, cycle frequency, and heating power on cycle output. These models are used to compare the two thermodynamic cycles. This comparison shows that as with traditional thermal cycles the Ericsson cycle provides the potential for higher cycle work while the Brayton cycle can produce a higher output power at higher thermal efficiency. Additionally, limitations to implementation of a high-speed Ericsson cycle were identified, primarily tied to conflicts between the available temperature margin and the requirement for isothermal electrical charging and discharging.

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New Highway Power Generation Device Based on Auto Wake

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.288.172 ◽

2013 ◽

Vol 288 ◽

pp. 172-174

Author(s):

Jian Bo Xiao ◽

Wei Gang Zheng ◽

Yan Su

Keyword(s):

Power Generation ◽

Wind Energy ◽

Energy Conversion ◽

Wind Power ◽

Power Supply ◽

High Speed ◽

Wind Power Generation ◽

Supply Problem ◽

Electric Equipment ◽

The Government

With the increasingly serious environment pollution and energy shortage problem of further deepening, how to use more effective and more environmental protection equipment of the new energy conversion and utilization of become social the public and the government attaches great importance to the problem. According to the high speed highway car wake contains huge wind, the wind power generation unit born. The vertical shaft by double S rotor, wind deflector, variable speed clutch institutions, centripetal vertical pendulum and low speed generator composition , realized respectively the wind energy collection, transmission, temporary and transformation. This device for wind power generation field provides a more efficient energy conversion mode. Among them, we creatively applied the ratchet, vertical pendulum mechanism so that the wind energy conversion rate has been increased greatly. At the same time, can also solve the highway electric equipment of the power supply problem. This device design makes the highway lighting lamps and other electric equipment of the power supply problem to obtain the very good solve, reduce power facilities installation cost. The effective use of natural wind, expand the scope of the use of wind energy, alleviate energy nervous, also reduce the pollution of the environment.

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Fundamental Study on Friction-Driven Gyroscopic Power Generator Works Under Arbitrary Vibration

Volume 4: Dynamics, Vibration, and Control ◽

10.1115/imece2019-10474 ◽

2019 ◽

Author(s):

Aya Watanabe ◽

Ryousuke Yuyama ◽

Hiroshi Hosaka ◽

Akira Yamashita

Keyword(s):

Power Generation ◽

High Speed ◽

Electrical Power ◽

Low Frequency ◽

Inertial Force ◽

Fundamental Study ◽

Power Generator ◽

Energy Harvesters ◽

Low Frequency Vibration ◽

Circular Track

Abstract This paper describes a friction-driven gyro generator that works under arbitrary vibrations and generates more than 1 W of power. Vibrational generators are energy harvesters that convert environmental vibrations into electrical power via the inertial force of pendulums. In conventional generators that use simple vibration, the power is less than 10 mW for a wearable size because vibrations in the natural environment are as low as 1 Hz. Gyroscopic generators increase the inertial force by rotating a pendulum at high speed and creating a gyro effect. In this generator, a palm-size product that generates 0.1 W and weighs 280 g has already been commercialized, but this device operates only under a particular vibration that synchronizes rotor precession and stalls under random vibration. To solve this problem, in this research, two gimbals and a precession spring are introduced to support the rotor. We developed a prototype generator with straight tracks measuring 16 cm × 11 cm × 12 cm with a mass of 980 g. Under a vibration of 4 Hz and ±20 degrees, power generation of 1.6 W was confirmed. Next, a prototype circular track was made. Power generation of 0.2 W with a vibration of 1 Hz and ±90 degrees was confirmed. Finally, a simple formula to estimate the upper limit of the generation power is derived. It is suggested that the circular-type generator is suitable for low-frequency vibration and can generate twice the power of a straight-type generator.

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Design and analysis of a high-speed induction machine as electric vehicle traction drive

2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe) ◽

10.1109/epe.2016.7695691 ◽

2016 ◽

Cited By ~ 6

Author(s):

Torsten Epskamp ◽

Benjamin Butz ◽

Martin Doppelbauer

Keyword(s):

Electric Vehicle ◽

High Speed ◽

Induction Machine ◽

Traction Drive

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Undercut GaAs/In0.5Ga0.5P High-Speed Laser Power Converter for Simultaneous 10 Gbit/sec Data Detection and Efficient dc Electrical Power Generation

10.7567/ssdm.2012.a-6-5 ◽

2012 ◽

Author(s):

J. M. Wun ◽

J. W. Shi ◽

C. Y. Tsai ◽

Y. M. Hsin

Keyword(s):

Power Generation ◽

Electrical Power Generation ◽

Laser Power ◽

High Speed ◽

Electrical Power ◽

Power Converter ◽

Data Detection

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621 Shear response of lubricant on high speed traction drive

The Proceedings of Conference of Tokai Branch ◽

10.1299/jsmetokai.2000.49.371 ◽

2000 ◽

Vol 2000.49 (0) ◽

pp. 371-372

Author(s):

Ryuei HAKAMATA ◽

Fumihiro ITOIGAWA ◽

Takashi NAKAMURA ◽

Tomio MATSUBARA ◽

Masanobu NAKANE

Keyword(s):

High Speed ◽

Traction Drive ◽

Shear Response

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Comparison between Water Contents Reported and Actual Water Contents in High Speed Diesel Used for Industrial Power Generation in Pakistan to Establish Relationship between NOx Reported and NOx Observed in Industrial Emissions

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.396-398.2275 ◽

2011 ◽

Vol 396-398 ◽

pp. 2275-2278

Author(s):

Farrukh Afaq Qasmi ◽

Atif Naveed Hadis ◽

Syed Jawid Askari

Keyword(s):

Power Generation ◽

High Speed ◽

Consumer Good ◽

Oxides Of Nitrogen ◽

Industrial Emissions ◽

Contributing Factors ◽

Industrial Emission ◽

High Speed Diesel ◽

Day By Day ◽

Water Contents

Environmental pollution due to industrial emission is becoming a growing problem day by day and Oxides of Nitrogen (NOx) are one of the contributing factors in it. Researchers are in continuous efforts for finding out ways to control these NOx. Out of many, one of the ways to control these NOx is by controlling the volume of water in High Speed Diesel (HSD) used for power generation in Diesel generators (DGs). Water content in HSD provides oxygen for the formation of NOx. Research presented in this paper also revolves around the relation ship between the water contents of HSD and NOx emitted by the DGs. Relevant industrial data of water contents in HSD and NOx percentage in emissions has been collected from selected Industry in Pakistan the largest consumer good manufacturer in Pakistan and one of the largest Multi-national consumer goods manufacturer.

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