Pobuda ultrazvučnog pretvarača rezonantnim pretvornikom veće snage

undergraduate thesis

• Title (english): Excitation of ultrasound transducer by using high power resonant converter
• Author: Anamarija Jelić
• Mentor: Antonio Petošić (mentor)
• Committee member: Antonio Petošić (predsjednik povjerenstva)
• Committee member: Ivan Đurek (član povjerenstva)
• Committee member: Marko Horvat (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2020-07-06, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Ovaj završni rad bavi se pobuđivanjem ultrazvučnog pretvarača rezonantnim pretvornikom veće snage. Definirani su parametri ultrazvučnog polja kako bi se razumio rad ultrazvučnog pretvarača. Izmjerena je električna impedancija ultrazvučnog pretvarača kako bi se odredila rezonantna frekvencija na temelju koje se mikrokontrolerom generira pravokutni pobudni signal. Objašnjen je način dobivanja pobudnog signala s odbrojavanjem sata u sustavu i modulom za modulaciju trajanja impulsa. Signal generiran mikrokontrolerom nema dovoljnu snagu za pobuđivanje ultrazvučnog pretvarača zbog toga je u radu obrađeno pojačalo snage klase E na koje se spaja izlaz mikrokontrolera.

Abstract (english)

This BSc thesis considers the excitation of ultrasound transducer by using a high power resonant converter. Parameters of the ultrasound field are defined to understand the operation of the ultrasound transducer. The electrical impedance of the ultrasound transducer was measured to determine its resonant frequency. Rectangular excitation signal of the same frequency as the resonant frequency is generated by the microcontroller. The method of generating an excitation signal with a system timer or pulse width modulation module is explained. The signal generated by the microcontroller does not have enough power to excite the ultrasonic transducer and that is why the signal has to be amplified. In this thesis class E resonant power converter with zero voltage switch is analyzed.

• Keywords: piezoelektrični materijali; ultrazvučni pretvarači; pojačala snage klase E; mikrokontroler
• Keywords (english): piezoelectric materials; ultrasound transducers; resonant power converter; microcontroller
• Language: croatian
• URN:NBN: urn:nbn:hr:168:988720
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-14 08:59:16