Title :
Subharmonic driving: a new concept to drive piezoelectric transformers in power converters
Author :
Alou, P. ; Cobos, J.A. ; Sanz, M. ; Prieto, R. ; Uceda, J. ; Rivas, M. ; Navas, J.
Author_Institution :
Div. de Ingenieria Electron., Univ. Politecnica de Madrid, Spain
Abstract :
A new concept to drive piezoelectric transformers (PT) is presented and validated in this paper. The subharmonic driving consists on applying a voltage waveform to the PT whose fundamental frequency (f PT/n) contains the resonance harmonic (fPT) at which the PT transfers the energy. It is important to highlight that this solution is proposed in order to improve the whole power converter, even if the PT performance is not as good as it could be with sinusoidal excitation. The PT should be specifically designed to handle more energy
Keywords :
driver circuits; piezoelectric devices; power convertors; power transformers; energy transfer; fundamental frequency; performance; piezoelectric transformers; power converters; resonance harmonic; sinusoidal excitation; subharmonic driving; voltage waveform application; Electromagnetic interference; Impedance measurement; Resonance; Resonant frequency; Shape; Switches; Switching frequency; Thickness measurement; Transformers; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.911691
