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Open AccessArticle

Miniaturized Air-Driven Planar Magnetic Generators

by Jingjing Zhao 1,2, Gengchen Shi 1 and Lin Du 1,*
1
National Lab of Mechatronics Engineering and Control, Beijing Institute of Technology, Beijing 100081, China
2
Department of Precision Instrument, Tsinghua University, Beijing 100084, China
*
Author to whom correspondence should be addressed.
Academic Editor: Issouf Fofana
Energies 2015, 8(10), 11755-11769; https://doi.org/10.3390/en81011755
Received: 3 June 2015 / Revised: 28 July 2015 / Accepted: 14 September 2015 / Published: 19 October 2015
This paper presents the design, analysis, fabrication and testing of two miniaturized air-driven planar magnetic generators. In order to reduce the magnetic resistance torque, Generator 1 establishes a static magnetic field by consisting a multilayer planar coil as the stator and two multi-pole permanent-magnet (PM) rotors on both sides of the coil. To further decrease the starting torque and save more space, Generator 2 adopts the multilayer planar coil as the rotor and the multi-pole PMs as the stator, eliminating the casing without compromising the magnetic structure or output performance. The prototypes were tested gathering energy from wind which can work at a low wind speed of 1~2 m/s. Prototype of Generator 1 is with a volume of 2.61 cm3 and its normalized voltage reaches 485 mV/krpm. Prototype of Generator 2 has a volume of 0.92 cm3 and a normalized voltage as high as 538 mV/krpm. Additionally, output voltage can be estimated at better than 96% accuracy by the theoretical model developed in this paper. The two micro generators are capable of producing substantial electricity with little volume to serve as compact power conversion devices. View Full-Text
Keywords: magnetic generator; miniaturized generator; planar generator; air-driven generator magnetic generator; miniaturized generator; planar generator; air-driven generator
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Zhao, J.; Shi, G.; Du, L. Miniaturized Air-Driven Planar Magnetic Generators. Energies 2015, 8, 11755-11769.

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