The paper examines the weakly nonlinear behavior of a 5-layer beam-like piezo- electric transformer operating near resonance, where the main structure of the device consists of properly poled and electroded flexible p...The paper examines the weakly nonlinear behavior of a 5-layer beam-like piezo- electric transformer operating near resonance, where the main structure of the device consists of properly poled and electroded flexible piezoceramic four-layers separated by a central metallic layer. Nonlinear effects of the large deflection to induce the incidental implane extension near res- onance are considered, which is shown that on one side of the resonant frequency the output-input relation becomes nonlinear, and the other side output voltage experiences jumps.展开更多
Main aim of the presented paper is the theoretical analysis and experimental verification of the transformation parameters for the new type of nonhomogeneously poled ring transformer.The input part is poled in the thi...Main aim of the presented paper is the theoretical analysis and experimental verification of the transformation parameters for the new type of nonhomogeneously poled ring transformer.The input part is poled in the thickness direction and output part in the radial direction.Two transformer geometries are studied—the input part is at inner ring segment,or it is at the outer ring segment.The optimum electrode size aspect ratios have been found experimentally as d_(1)=D≈0:60-0:65 for the ring with aspect ratio d=D¼0:2.The fundamental as well as higher overtone resonances were studied for the transformation ratio,the optimum resistive load,efficiency and no-load transformation ratio.Higher overtones have better transformation parameters compared to the fun-damental resonance.The new type ring transformer exhibits very high transformation ratios up to 200 under no-load and up to 13.4 under a high efficiency of 97%at the optimum load conditions of 10kΩ.Strong electric field gradient at the output circuit is applicable for the electrical discharge generation.展开更多
基金Project supported by the National Science Foundation of China(Nos.10932004 and 11272127)
文摘The paper examines the weakly nonlinear behavior of a 5-layer beam-like piezo- electric transformer operating near resonance, where the main structure of the device consists of properly poled and electroded flexible piezoceramic four-layers separated by a central metallic layer. Nonlinear effects of the large deflection to induce the incidental implane extension near res- onance are considered, which is shown that on one side of the resonant frequency the output-input relation becomes nonlinear, and the other side output voltage experiences jumps.
基金This work was supported by the Czech Ministry of Education under the project LO1213.
文摘Main aim of the presented paper is the theoretical analysis and experimental verification of the transformation parameters for the new type of nonhomogeneously poled ring transformer.The input part is poled in the thickness direction and output part in the radial direction.Two transformer geometries are studied—the input part is at inner ring segment,or it is at the outer ring segment.The optimum electrode size aspect ratios have been found experimentally as d_(1)=D≈0:60-0:65 for the ring with aspect ratio d=D¼0:2.The fundamental as well as higher overtone resonances were studied for the transformation ratio,the optimum resistive load,efficiency and no-load transformation ratio.Higher overtones have better transformation parameters compared to the fun-damental resonance.The new type ring transformer exhibits very high transformation ratios up to 200 under no-load and up to 13.4 under a high efficiency of 97%at the optimum load conditions of 10kΩ.Strong electric field gradient at the output circuit is applicable for the electrical discharge generation.
