Power Converters for Power-Ultrasonic Transducers

Ying Wang, Mike Draper, Simon Denley, Francis Robinson, Peter Shepherd

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

5 Citations (SciVal)
945 Downloads (Pure)


High-performance power-converters in the form of single-tone class-D amplifiers are required to drive power-ultrasonic transducers in industrial applications. These must produce low-distortion, variable-frequency, and variable-amplitude sinusoidal currents to efficiently drive the piezoelectric cell and horn of transducers, and thereby vibrate materialprocessing stages. A resonant-tracking control strategy is generally used to efficiently couple and regulate output power delivery at a high-Q probe-system resonant mode. This paper reviews a number of power-converter control options suitable for such probe drivers, including quasi-squarewave (QS), naturally sampling pulse width modulation (PWM) and programmed PWM (PPWM). Typical output-waveform quality and the PSPICE models of the power-converter and piezoelectric transducer developed to assess and compare methods are presented.
Original languageEnglish
Title of host publication46th International Universities' Power Engineering Conference (UPEC)
Place of PublicationGermany
Pages1 - 6
Number of pages6
Publication statusPublished - Sept 2011
Event46th International Universities' Power Engineering Conference (UPEC 2011) - Soest, Germany
Duration: 5 Sept 20118 Sept 2011


Conference46th International Universities' Power Engineering Conference (UPEC 2011)


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