Title :
Effects of electrode layouts on electrical characteristics for unipoled step-down piezoelectric transformers
Author :
Bai, Feng-Xian ; Dong, Wei-Jie ; Xu, Yong-Jie
Author_Institution :
Sch. of Electron. & Inf. Eng., Dalian Univ. of Technol., Dalian, China
Abstract :
The electrical characteristics of single layer unipoled step-down piezoelectric transformers are investigated. The configuration of PT is circle-circle, where the inner circle is input and outer ring is output. The electrical characteristics simulation and performance test are focused on voltage gains and output power. Moreover, effects of input and output electrode area on voltage gains and output power are discussed. It was shown that a good voltage step-down effect accompanied with not ideal output power is obtained from small input/output area ratio. The step-down ratio of 0.12 with an efficiency of 93% is obtained at RL=20 Omega in the PT with input inner diameter of 7 mm, gap of 1 mm and disc diameter of 30 mm.
Keywords :
electrodes; piezoelectric devices; transformers; electrical characteristics simulation; electrode layout effect; unipoled step-down piezoelectric transformer; Capacitance; Consumer electronics; Electric variables; Electrodes; Equivalent circuits; Personal digital assistants; Power generation; Testing; Transformers; Voltage;
Conference_Titel :
Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4970-5
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2009.5307543
