Limits...
Energy Harvesting from Upper-Limb Pulling Motions for Miniaturized Human-Powered Generators.

Yeo J, Ryu MH, Yang Y - Sensors (Basel) (2015)

Bottom Line: This study proposes a portable human-powered generator which is designed to obtain mechanical energy from an upper limb pulling motion for improved human motion economy as well as efficient human-mechanical power transfer.Its small form factor (50 mm × 32 mm × 43.5 mm, 0.05 kg) and the substantial electricity produced verify the effectiveness of the proposed method in the utilization of human power.It is expected that the developed generator could provide a mobile power supply.

View Article: PubMed Central - PubMed

Affiliation: Healthcare Engineering, Chonbuk National University, Deokjin-dong Jeonju 664-14, Korea. yeojjin85@jbnu.ac.kr.

ABSTRACT
The human-powered self-generator provides the best solution for individuals who need an instantaneous power supply for travel, outdoor, and emergency use, since it is less dependent on weather conditions and occupies less space than other renewable power supplies. However, many commercial portable self-generators that employ hand-cranking are not used as much as expected in daily lives although they have enough output capacity due to their intensive workload. This study proposes a portable human-powered generator which is designed to obtain mechanical energy from an upper limb pulling motion for improved human motion economy as well as efficient human-mechanical power transfer. A coreless axial-flux permanent magnet machine (APMM) and a flywheel magnet rotor were used in conjunction with a one-way clutched power transmission system in order to obtain effective power from the pulling motion. The developed prototype showed an average energy conversion efficiency of 30.98% and an average output power of 0.32 W with a maximum of 1.89 W. Its small form factor (50 mm × 32 mm × 43.5 mm, 0.05 kg) and the substantial electricity produced verify the effectiveness of the proposed method in the utilization of human power. It is expected that the developed generator could provide a mobile power supply.

No MeSH data available.


Related in: MedlinePlus

Electromagnetic coupling structure of the proposed APMM.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4541857&req=5

sensors-15-15853-f003: Electromagnetic coupling structure of the proposed APMM.

Mentions: Figure 3 shows the APMM scheme proposed in this study in which a neodymium (NdFeB) magnet rotor and the coil stator are coupled in an axial direction for better miniaturization [16,17,18]. All 12 magnets were positioned in the disc rotor along its edge with alternating polarities. Every two coils were electrically paired to double the induced voltage when moving magnetic field changes its polarity in the midst of each paired coil.


Energy Harvesting from Upper-Limb Pulling Motions for Miniaturized Human-Powered Generators.

Yeo J, Ryu MH, Yang Y - Sensors (Basel) (2015)

Electromagnetic coupling structure of the proposed APMM.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541857&req=5

sensors-15-15853-f003: Electromagnetic coupling structure of the proposed APMM.
Mentions: Figure 3 shows the APMM scheme proposed in this study in which a neodymium (NdFeB) magnet rotor and the coil stator are coupled in an axial direction for better miniaturization [16,17,18]. All 12 magnets were positioned in the disc rotor along its edge with alternating polarities. Every two coils were electrically paired to double the induced voltage when moving magnetic field changes its polarity in the midst of each paired coil.

Bottom Line: This study proposes a portable human-powered generator which is designed to obtain mechanical energy from an upper limb pulling motion for improved human motion economy as well as efficient human-mechanical power transfer.Its small form factor (50 mm × 32 mm × 43.5 mm, 0.05 kg) and the substantial electricity produced verify the effectiveness of the proposed method in the utilization of human power.It is expected that the developed generator could provide a mobile power supply.

View Article: PubMed Central - PubMed

Affiliation: Healthcare Engineering, Chonbuk National University, Deokjin-dong Jeonju 664-14, Korea. yeojjin85@jbnu.ac.kr.

ABSTRACT
The human-powered self-generator provides the best solution for individuals who need an instantaneous power supply for travel, outdoor, and emergency use, since it is less dependent on weather conditions and occupies less space than other renewable power supplies. However, many commercial portable self-generators that employ hand-cranking are not used as much as expected in daily lives although they have enough output capacity due to their intensive workload. This study proposes a portable human-powered generator which is designed to obtain mechanical energy from an upper limb pulling motion for improved human motion economy as well as efficient human-mechanical power transfer. A coreless axial-flux permanent magnet machine (APMM) and a flywheel magnet rotor were used in conjunction with a one-way clutched power transmission system in order to obtain effective power from the pulling motion. The developed prototype showed an average energy conversion efficiency of 30.98% and an average output power of 0.32 W with a maximum of 1.89 W. Its small form factor (50 mm × 32 mm × 43.5 mm, 0.05 kg) and the substantial electricity produced verify the effectiveness of the proposed method in the utilization of human power. It is expected that the developed generator could provide a mobile power supply.

No MeSH data available.


Related in: MedlinePlus