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8177293 
Journal Article 
Piezoelectric ceramic bimorph coupled to thin metal plate as cooling fan for electronic devices 
Yoo, JH; Hong, JI; Cao, W 
2000 
1 
Sensors and Actuators A: Physical
ISSN: 0924-4247
EISSN: 1873-3069 
ELSEVIER SCIENCE SA 
LAUSANNE 
79 
1 
8-12 
WOS:000084935300002 
Several types of piezoelectric fans for cooling electronic devices were constructed and tested at 60 Hz, 110 V and 220 V, respectively. The aim of the work is to investigate the possibility of replacing the rotary type of fan in some noise-sensitive electronic devices. Different vibrating metal plates were tested and analyzed theoretically. It is found that the resonant frequency of the vibrating plate decreases with the increase of its length (l) if the length of the piezoelectric ceramic bimorph (L) is kept construct. The series-type fan with l = 31.8 mm, made of phosphor bronze vibrating plate (S6), shows the highest value of fan tip displacement of 35.5 mm and produced wind velocity of 3.1 m/s driven by a 220 V, 60 Hz power source. (C) 2000 Elsevier Science S.A. All rights reserved. 
piezoelectric fan; vibrating plate; PZT-5; displacement; wind velocity