Comparison of Linear and Switching Drive Amplifiers for Piezoelectric Actuators
نویسندگان
چکیده
The power requirements imposed on the amplifier by piezoelectric actuators is discussed. We consider a two-degree-of-freedom mechanical system driven by a piezoelectric stack for the purpose of analyzing power flow and power dissipation of four amplifiers. Two of the amplifiers are benchtop linear amplifiers. The other two amplifiers are based on switching topologies. The power consumption of all four of these amplifiers is measured and compared. It is shown that the linear amplifiers consume significantly more power than the switching amplifiers. These measurements confirm well-known analyses of these two amplifier topologies.
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