Title :
Predicting the zero-voltage switching profiles of half-bridge driven inductor-less piezoelectric transformer-based inverters
Author :
Foster, Martin P. ; Horsley, E.L. ; Stone, David A.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield, UK
fDate :
8/1/2012 12:00:00 AM
Abstract :
A methodology for predicting the ability of an inductor-less driven piezoelectric transformer (PT)-based inverter to achieve zero-voltage switching (ZVS) is presented. Cyclic-mode analysis is used to derive a model of the PT operating in the vicinity of ZVS. The output of the model is a normalised parameter that indicates the PT-based inverter´s ability to achieve ZVS for a given operating condition. Subsequently, the model is employed to generate the ZVS profiles of a PT-based inverter that indicates regions where ZVS can be achieved and provides the loci of the operating frequency and dead-time when working at the ZVS boundary. The ZVS profiles of two PT-based inverters with different characteristics are presented to highlight the need to consider the ZVS loci when selecting a PT for a given application.
Keywords :
bridge circuits; inductors; invertors; piezoelectric devices; transformers; zero voltage switching; ZVS; cyclic-mode analysis; half-bridge driven inductor-less piezoelectric transformer-based inverter; zero-voltage switching profile;
Journal_Title :
Power Electronics, IET
DOI :
10.1049/iet-pel.2011.0344