Journal
JOURNAL OF ELECTROCERAMICS
Volume 31, Issue 1-2, Pages 35-41Publisher
SPRINGER
DOI: 10.1007/s10832-013-9817-9
Keywords
Piezoelectricity; Energy harvesting system; Vibration; Superconducting Maglev
Categories
Funding
- Future Rail Technology Development Project (KICTEP)
- Ministry of Land, Transport and Maritime Affairs, Republic of Korea (Development of piezoelectric harvesting system for application of train)
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In order to scavenge wasted energy from the vertical vibration of the superconductor Maglev bogie system into usable energy, an energy harvesting system was designed and optimized by applying steel balls for piezoelectric material to effectively convert mechanical energy into electrical energy. Different size of steel balls were placed on a piezoelectric plate to amplify effects of piezoelectric material caused by the ambient vibration of superconducting Maglev train. An experiment was conducted to study the effects of the size of the balls (5.95, 7.14, 7.95, 9.55, 11.15, 12.71 or 15.89 mm), different total loads (68, 80, 100 g), vibration frequencies (11, 28 Hz), and the insertion of an LED. The following experimental results were found. First, the output voltages of the piezoelectric system increased when the steel ball diameter sizes increased until the optimum size determined by its geometric structure was reached. Secondly, as the vibration frequency increased, the output voltage also increased from millivolts to volts.
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