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Micro-energy storage system using permanent magnet and high-temperature superconductor

Lee, Kangwon and Yi, Ji-eun and Kim, Bongsu and Ko, Junseok and Jeong, Sangkwon and Noh, Myoungyu and Lee, Seung S. (2008) Micro-energy storage system using permanent magnet and high-temperature superconductor. Sensors and Actuators A: Physical, 143 (1). 106 - 112.

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Official URL: http://www.sciencedirect.com/science/article/B6THG...

Abstract

This paper presents the design and experiment with a micro-energy storage system using an axial-flux permanent magnet and a high-temperature superconductor (HTS). This system consists of a three-phase planar stator, flywheel, and HTS. The three-phase planar stator is fabricated with five lines, width of 100 μm, and height of 50 μm for low eddy current loss and high current density. The flywheel with a diameter of 50 mm is integrated by eight motor/generator magnets on the upper side and a single bearing magnet on the bottom side. The HTS is made of melt-textured yttrium-barium-copper-oxide (YBCO) and is used as the non-contact bearing by a levitation force. The maximum rotational speed of the flywheel is 51,000 rpm at 12 V and 0.68 A. At this speed, the flywheel stores a rotational kinetic energy of 337 J and the no-load three-phase electric output is 802 mVrms. By using a three-phase full-wave rectifier, an electric output power of 50 mW is measured.

Item Type:Article
Additional Information:Micromechanics Section of Sensors and Actuators (SAMM), based on contributions revised from the Technical Digest of the IEEE 20th International Conference on Micro Electro Mechanical Systems (MEMS 2007) - MEMS 2007, IEEE 20th International Conference on Micro Electro Mechanical Systems
Uncontrolled Keywords:Power MEMS; High-temperature superconductor; Axial-flux permanent-magnet motor; Planar stator; Energy conversion
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Technology > Nanotechnology and energy applications
ID Code:4921
Deposited By:SPI
Deposited On:09 Apr 2009 14:23
Last Modified:09 Apr 2009 14:23

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