An auxiliary capacitor based ultra-fast drive circuit for shear piezoelectric motors
Author(s)Chatterjee, Kamalesh; Boyer, Michael C.; Wise, W. D.; Hudson, Eric
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Shear piezoelectric motors frequently require large voltage changes on very short time scales. Since piezos behave electrically as capacitors, this requires a drive circuit capable of quickly sourcing or sinking a large amount of current at high voltages. Here we describe a novel circuit design using a high voltage amplifier, transistor switching stage, and auxiliary capacitor. This circuit can drive piezoelectric motors at higher speeds and lower costs than conventional methods and with greater flexibility for computer automation. We illustrate its application in a controller for a scanning tunneling microscope coarse approach mechanism and discuss other possible applications and modifications of this circuit.
DepartmentMassachusetts Institute of Technology. Department of Physics
Review of Scientific Instruments
American Institute of Physics
Chatterjee, Kamalesh et al. “An auxiliary capacitor based ultrafast drive circuit for shear piezoelectric motors.” Review of Scientific Instruments 80.9 (2009): 095110-5.
Author's final manuscript