Fabrication of high-power piezoelectric transformers using lead-free ceramics for application in electronic ballasts

Song Ling Yang, Shih Ming Chen, Cheng Che Tsai, Cheng Shong Hong, Sheng-Yuan Chu

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

CuO is doped into (Na0.5K0.5)NbO3 (NKN) ceramics to improve the piezoelectric properties and thus obtain a piezoelectric transformer (PT) with high output power. In X-ray diffraction patterns, the diffraction angles of the CuO-doped NKN ceramics shift to lower values because of an expansion of the lattice volume, thus inducing oxygen vacancies and enhancing the mechanical quality factor. A homogeneous microstructure is obtained when NKN is subjected to CuO doping, leading to improved electrical properties. PTs with different electrode areas are fabricated using the CuO-doped NKN ceramics. Considering the efficiency, voltage gain, and temperature rise of PTs at a load resistance of 1 kΩ, PTs with an electrode with an inner diameter of 15 mm are combined with the circuit design for driving a 13-W T5 fluorescent lamp. A temperature rise of 6°C and a total efficiency of 82.4% (PT and circuit) are obtained using the present PTs.

Original languageEnglish
Article number6416496
Pages (from-to)408-413
Number of pages6
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume60
Issue number2
DOIs
Publication statusPublished - 2013 Feb 4

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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