Please use this identifier to cite or link to this item: https://etd.cput.ac.za/handle/20.500.11838/1093
Title: Development of a hand-held multicell inverter-based ultrasonic plastic welder
Authors: Davies, Edward 
Keywords: Plastics -- Welding;Ultrasonic welding
Issue Date: 2009
Publisher: Cape Peninsula University of Technology
Abstract: This thesis presents the design and development of a multicell inverter for ultrasonic plastic welding applications and other ultrasonic applications. An overview of the main multilevel topologies is given, but this research focuses on the multicelll inverter, because of its capacitor voltage balancing properties. Loading effects of various plastic materials to an ultrasonic plastic welding tool are provided in this thesis. A simple method to create an approximate electrical equivalent circuit of the ultrasonic welding tool, using an impedance analyser, loaded with different plastics is discussed and illustrated. Experimental results of the four-level multicell inverter driving a resistive load and an ultrasonic transducer tool are presented in this thesis. These results provide proof that the multicell inverter topology is capable of driving a non-linear load. The inverter was tested with the ultrasonic load as an ultrasonic plastic welder and an ultrasonic drill. The welding joints on the plastic samples are also evaluated in order to evaluate whether or not this solution is suitable for plastic welding. The ultrasonic drilling results are also shown in this thesis. It is further illustrated that the ultrasonic tool and power supply combination may be used in other ultrasonic applications.
Description: Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2009
URI: http://hdl.handle.net/20.500.11838/1093
Appears in Collections:Electrical, Electronic and Computer Engineering - Master's Degree

Files in This Item:
File Description SizeFormat 
Development of a hand-held multicell inverter-based ultrasonic plastic welder.pdf19.57 MBAdobe PDFThumbnail
View/Open
Show full item record

Page view(s)

484
Last Week
0
Last month
3
checked on Dec 23, 2024

Download(s)

142
checked on Dec 23, 2024

Google ScholarTM

Check


This item is licensed under a Creative Commons License Creative Commons