Open AccessPLL controller for achieving zero‐voltage switching (ZVS) in inductorless half‐bridge drive piezoelectric transformer resonant power supplies
Author(s) -
Foster Martin P.,
Davidson Jonathan N.,
Stone D. A.,
Yappa Ruchira
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8063
Subject(s) - transformer , voltage , phase locked loop , piezoelectricity , electrical engineering , power mosfet , power (physics) , control theory (sociology) , computer science , physics , mosfet , engineering , control (management) , transistor , jitter , quantum mechanics , artificial intelligence
Inductorless half‐bridge, piezoelectric transformer (PT) resonant power supplies require careful control if zero‐voltage switching (ZVS) of the MOSFETs is to be achieved. Here, the authors describe how a phase‐locked loop (PLL) may be used to achieve this by ensuring adequate deadtime exists between the two MOSFETs to allow the PT input voltage to fully charge to the DC link. Experimental results demonstrate the operation of the system.