Development of the Multilayer Alternately Poled Piezoelectric Transformers

Abstract

The structure of piezoelectric transformers were studied to enlarge the output power capacity. The power parameter m A 2 2 was proposed to predict the performance of the high-power piezoelectric transformers. In a former report, we proposed a new-structure piezoelectric transformer named alternately poled piezoelectric transformer (APT). Its step-up ratio was twice as large as that of the Rosen type transformer, in spite of the single layer structure. In this study, the APT with 1.5 wavelength resonant mode was modified to increase the output power capacity and the multilayer structure was utilized to enlarge the step-up ratio. As a result, both a high step-up ratio of 23 and the output power capacity of 7.1 W were accomplished under a load of 100 k Ω.

Design and construction of a multifunction piezoelectric transformer

“…Meanwhile, mechanical parameters can be replaced by their electric counterparts. Around the 1950s, the piezoelectric transformers had emerged, and its equivalent circuits had been derived [9][10][11] in the forms of different basic model cells.…”

“…In addition to the conventional applications such as ballast for back light inverter in notebook computers, camera flash, and fuel ignition, several new applications have emerged such as AC/DC converter, power supply for displays, image intensifiers, and automobile lighting. Several transformer designs have been proposed to meet the specifications in multifunctional applications [8][9][10][11].…”

Effect of Sintering Process on Characteristics of Multilayer Piezoelectric Pb(Mg1/3Nb2/3)O3–Pb(Zn1/3Nb2/3)O3–Pb(Zr,Ti)O3 Ceramic Transformers

“…Up to now, MPT materials with high mechanical quality factor, high piezoelectric constant, high electromechanical coupling factor, low dielectric loss, and low firing temperature have been investigated intensively. [7][8][9] However, there are few reports on fabrication of new types of MPT with favorable performance.…”