Title :
Quantum mode control for piezoelectric transformers in AC/DC applications
Author :
Nuño, Fernando ; Martín, Juan A. ; Diaz, Juan ; Prieto, Miguel J. ; Fernández-Linera, Francisco M.
Author_Institution :
Area de Tecnologia Electronica, Univ. de Oviedo, Gijon, Spain
Abstract :
Piezoelectric transformers (PTs) could be an attractive solution to reduce size and weight in AC/DC adapters for portable terminals. In these topologies, the magnetic transformers limit the converter miniaturization and are also EMI sources. Piezoelectric transformers feature low profile high power density and low EMI generation. In this paper, a new control method ("Quantum") for PT-based converters is introduced. As a result, an 8-Watt AC/DC adapter (110 VAC input, 12 VDC output) is also presented operating at frequencies around 500 kHz with quantum mode control.
Keywords :
AC-DC power convertors; electromagnetic interference; piezoelectric devices; transformers; voltage control; 110 V; 12 V; 500 kHz; 8 W; AC/DC adapters; AC/DC applications; EMI sources; converter miniaturization; low EMI generation; low profile high power density; magnetic transformers; output voltage control; piezoelectric transformers; portable terminals; quantum mode control; Equivalent circuits; Frequency; Impedance; Magnetic devices; Magnetic materials; Pulse width modulation; Switches; Topology; Transformers; Voltage control;
Conference_Titel :
Power Electronics Congress, 2002. Technical Proceedings. CIEP 2002. VIII IEEE International
Print_ISBN :
0-7803-7640-4
DOI :
10.1109/CIEP.2002.1216660
