Abstract
Piezoelectric transformers (PTs) are solid-state devices that transform electrical energy into electrical energy by means of a mechanical vibration. These devices are manufactured using piezoelectric materials that are driven at resonance. 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 transformer, without making use of magnetic materials and obtaining excellent conversion efficiencies. The initial concept of a piezoelectric ceramic transformer was proposed by Charles A. Rosen in 1954. Since then, the evolution of piezoelectric transformers through history has been linked to the relevant work of some excellent researchers as well as to the evolution in materials, manufacturing processes, and driving circuit techniques. This paper summarizes the historical evolution of the technology.
Highlights
Introduction of of piezoelectric transformers transformers (PTs)PTs for for cold cathode fluorescent lamps (CCFLs)cathode fluorescent fluorescent lamps lamps (CCFL) Backlighting Backlighting1.5. 1990s–2000s: Commercial Introduction of PTs for CCFL BacklightingIn the the late late 1980s, 1980s, several several JapaneseJapanese companies, companies, including including NEC NEC Corp
Salt Rochelle single crystals, the only extensively available material at the time. The use of this material material led to obvious limitations in performance, design and applicability as compared to the later led to obvious limitations in performance, design and applicability as compared to the later developed developed piezoceramic materials
He returned to Canada where he spent the period of World War II supervising supervising a group testing Canadian fighter planes before they were sent to battle in Britain
Summary
Alexander McLean Nicolson has the honor of being the first researcher to investigate the idea of of aa piezoelectric piezoelectric transformer. One of the crystal elements was driven with an input electric signal generating a vibration in www.mdpi.com/journal/actuators the crystal. 2016, 5, 12crystal elements was driven with an input electric signal generating a vibration in 2 ofthe. Salt Rochelle single crystals, the only extensively available material at the time. The use of this material material led to obvious limitations in performance, design and applicability as compared to the later led to obvious limitations in performance, design and applicability as compared to the later developed developed piezoceramic materials
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