A Linear 10 kV Power Amplifier for Piezo Actuators
Proceedings:
Conference:
CIPS 2010 - 6th International Conference on Integrated Power Electronics Systems
Town:
Nuremberg, Germany
Date:
03/16/2010 - 03/18/2010
Authors:
Horn, T.; Melbert, J. (Institute for Electronic Circuits and Measurement, Ruhr-Universität Bochum, Germany)
File size:
617,63 kB
Pages:
5
Language:
english
Type:
Price:
15.00 €
Payment:
Abstract:
Linear pulse amplifiers with current mode output are advantageous for driving high voltage capacitive loads like piezoelectric or electrorheological actuators. The new amplifier implements output voltages up to 10 kV with 2 kW peak power and 80 microsec rise time. Low quiescent current of 0.6 mA minimizes static power losses. The structure consists of multiple stacked feedback loops in order to reach high transfer linearity and a symmetrical voltage division among the cascaded output power transistors. The linear approach eliminates the inherent ripple of switched mode power amplifiers and improves rise and fall times by at least one order of magnitude.
