The piezoelectric transformer is a combination of piezoelectric actuators as the primary side and piezoelectric transducers as the secondary side, both of which work in longitudinal or transverse. The principle operation of a piezoelectric transformer pt is a. Piezoelectric converters for dcdc and acdc applications a. Anintroductionto piezoelectricmaterials andapplications. Sanders is with the electrical engineering and computer science. Implementing a piezoelectric transformer for a ferroelectric phase. Pdf general study on piezoelectric transformer researchgate. These devices are manufactured using piezoelectric materials that are driven at resonance. Pdf electrical properties of low temperature sintering. With appropriate design and circuitry, it is possible to step up and step down the voltages between the input and output sections of the piezoelectric. The last two decades of research into piezoelectric transformer pt based power.
These phase shifters require a dc bias voltage, up to 300 vdc, for continuous 0 to 360 degree phase shift. Highvoltage piezoelectric transformers have been adopted by power electronic engineers and researchers worldwide. The principle operation of a piezoelectric transformer pt is a combined function of actuators. The highly resonance nature of a piezoelectric transformer is also its. Electrical properties of low temperature sintering stepdown multilayer piezoelectric transformer. Understanding piezoelectric transformers in ccfl backlight. Design and analysis of piezoelectric transformer converters by chihyi lin fred c.
A high voltage piezoelectric transformer for active interrogation presented by andrew benwell, a candidate for the degree of doctor of philosophy of electrical engineering, and hereby certify that in their opinion it is worthy of acceptance. A resonant piezoelectric transformer circuit was developed for high voltage. Piezoelectric transformers for ultralow voltage energy harvesting applications article pdf available in procedia engineering 87. This research explores using a piezoelectric transformer pt as the alternative. A transducer can be anything that converts one form of energy to another. Based on this, the tutorial describes vital elements of the piezo transformer such as electrical equivalent circuit, soft switching and the longitudinal mode transformer. Actuators free fulltext piezoelectric transformers. Transformers tutorial this piezo tutorial provides a basic introduction to piezoelectric transformers. Pdf piezoelectric transformer pzt is a device which transforms. Pdf piezoelectric transformers for ultralow voltage. Piezo transformer boost the input voltage 5v to several kilovolts that cause glow of of neon bulbs. Design and analysis of piezoelectric transformer converters. Technical university of denmark, department of electrical engineering. Abstract the increasing utilization of piezoelectric transformers pt in power electronics requires fundamental analysis and design of pt power converters.
Implementing a piezoelectric transformer for a ferroelectric phase shifter circuit anthony roberts abstract the ferroelectric phase shifter is the fundamental component in a new type of scanning phased array, the ferroelectric reflectarray. Engineering, and hereby certify that in their opinion it is worthy of acceptance. A piezoelectric transducer also known as a piezoelectric sensor is a device that uses the piezoelectric effect to measure changes in acceleration, pressure, strain, temperature or force by converting this energy into an electrical charge. Lee, chairman electrical engineering abstract piezoelectric ceramics are characterized as smart materials and have been widely used in the area of actuators and sensors. Understanding piezoelectric transformers in ccfl backlight applications market forces are reducing both the size and energy consumption requirements of portable devices such as pdas, internet appliances, and subnotebook computers. Piezoelectric transformer characterization and application. Piezoelectric products, piezo actuators, piezo motors, piezo ceramics, piezo transducers, atila fea software, piezoelectricity. Piezoelectric transformers of bar, plate, disc, and ring shapes are analytically modeled by the immittance method for onedimensional vibration modes as a function of dimensions, material. Power electronics research center, department of electrical engineering. Lowprofile cold cathode fluorescent lamp ccfl backlight solutions are commonly used in these applications. Kovaleski, dissertation advisor electrical and computer engineering.