ویژگی های الکتریکی ترانسفورماتور فیزوالکتریک توان بالا برای لامپ فلورسنت 28 واتی

In order to drive the T5 fluorescent lamp developed recently, contour vibration mode piezoelectric transformers with the composition of Pb(Ni1/2, W1/2)O3–Pb(Mn1/3, Nb2/3)O3–Pb(Zr, Ti)O3 (PNW–PMN–PZT) were fabricated to the modified filter structure. The composition ceramics were consolidated to the square plate using cold isostatic pressing and the ring/dot electrodes were designed on it for the impedance matching of the fluorescent lamp. Electrical properties and characteristic temperature rise caused by the vibration were measured. Efficiencies of the transformers proved to be above 90%. A 28 W fluorescent lamp was successfully driven by all of the transformers. The transformer with ring/dot electrode ratio of 1.83 showed the best properties in terms of output power, efficiency and characteristic temperature rise, 30.95 W, 97.5% and 8.3°C, respectively.