Miniaturized Air-Driven Planar Magnetic Generators

Jingjing Zhao, Gengchen Shi and Lin Du
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Jingjing Zhao: National Lab of Mechatronics Engineering and Control, Beijing Institute of Technology, Beijing 100081, China
Gengchen Shi: National Lab of Mechatronics Engineering and Control, Beijing Institute of Technology, Beijing 100081, China
Lin Du: National Lab of Mechatronics Engineering and Control, Beijing Institute of Technology, Beijing 100081, China

Energies, 2015, vol. 8, issue 10, 1-15

Abstract: 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 cm 3 and its normalized voltage reaches 485 mV/krpm. Prototype of Generator 2 has a volume of 0.92 cm 3 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.

Keywords: magnetic generator; miniaturized generator; planar generator; air-driven generator (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
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