Title :
An improved model for Rosen type piezoelectric transformer for power converter
Author :
Fung, S.W. ; Pong, M.H.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
Abstract :
Piezoelectric transformer is attractive because of its small thickness. Rosen Type piezoelectric transformer has high step-up ratio which is advantageous for high voltage power converters. In most cases the load has a range of variable resistances that can greatly affect the output characteristic of a piezoelectric transformer. The conventional model is not sufficient to model the gain characteristics with a wide load range. In this paper a modified model is presented. A simple fictitious resistor is employed to modify the conventional model and it produces excellent match with measurements. Experimental measurements are given to show the merits of the proposed model.
Keywords :
piezoelectric devices; power convertors; transformers; Rosen type piezoelectric transformer; conventional model; fictitious resistor; gain characteristics; power converter; step-up ratio; variable resistances; Electrical resistance measurement; Equivalent circuits; Frequency; Gain measurement; Laboratories; Power electronics; Power engineering and energy; Resistors; Resonance; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual
Print_ISBN :
0-7803-8399-0
DOI :
10.1109/PESC.2004.1355839