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23 May 1997 Drive electronics for large piezoactuators
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This paper describes drive amplifier development for large, high voltage piezo actuators. Piezo actuation's highly capacitive nature and its influence on drive amplifiers is discussed. A switching amplifier driving an inductor in series with the piezo material and controlled by an appropriate control law can drive piezo actuators. Since large piezo actuators tend toward higher voltages, a multi- level topology is described that allows drive amplifiers to provide voltages higher than solid state switching device ratings. High efficiency piezo drive amplifiers must accommodate energy stored in the piezo material. A topology is described that actively stores the capacitative energy, thus reducing the size, weight and power consumption of the electronics system. Test results are presented for a developmental 1.2 KV, piezo drive amplifier that can drive a 0.6 (mu) F piezo actuator at 100 Hz. This work done in conjunction with Smart Structures for Rotor Craft Consortium in support of AFORS/DARPA.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dan J. Clingman "Drive electronics for large piezoactuators", Proc. SPIE 3044, Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies, (23 May 1997);

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