Inversor ressonante em comutação suave para levitação ultrassônica

• Autor(a) principal: Silva, Mateus Marcoto
• Data de Publicação: 2021
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/215937
• topic: Power electronics; Resonant inverter; Ultrasonic levitation; Eletrônica de potência; Inversor ressonante; Levitação ultrassônica

In this work was developed an ultrasonic resonant inverter as a power source for a power ultrasonic transducer capable of emitting acoustic waves enough to levitate small particles. It has been allied with a hypothetical application in high performance printers for long uninterrupted duty cycles as an alternative proposal to the thermal method for viscosity change in paper ink deposition. Its inverter was projected as a reference to a common product in the ultrasonic clearing sector, including a solvent reservatory that cavitates because of the transducer vibration, a tiny bubble formation due to solvent high displacement granting to clear delicate small pieces as mechanical components, jewels or lenses, saving it from abrasive wastage. Thus, the project stands out to solve efficiency, form factor and power factor without increase in the final price. This Is because the resonant circuits technology results in better adjusted waveforms to the load characteristics such as presented in only the fundamental harmonic component of the desired signal to the proper device working. Besides that, the soft switching technique proportionate significantly less commutation power loss, ZCS - Zero Current Switch. All these technological advantages are featured on the same topology of the reference circuit, a half bridge inverter. And its economic advantage is only possible because of the breakdown voltage of its active switches being cheaper for its application. Its result was realized afterwards by a step-by-step qualitative circuit analysis, from Laplace transformation of each current enlace and latter quantitative analysis within prerequisites for levitating established by the load, a 28kHz and 100W transducer.