PIEZOELECTRIC EFFECT DRIVER
The piezo driver must be able to output such high current, high voltage, and high frequency at the same time. For a high-frequency piezoelectric actuator whose capacitance is 1.1uF, the required peak voltage is 30V, and the driving frequency is 15kHz the peak current required from the driver is about 2.5A (5.0A peak-to-peak). Let’s exam the fundamentals of piezo devices and techniques for driving them. Some of these PZT devices are operating at DC voltages, while some are driven by AC waveforms such as sine, square, and others. Examples of inverse piezoelectric effect devices are: piezo actual, motor, speaker/buzzer, high-power ultrasound transducer for cleaning, imaging, levitation, etc. Most piezo (sometimes called PZT) devices today use the inverse piezoelectric effect. PZT) and the invention of many practical piezoelectric devices.įigure 1 Piezo device expand/contract as applied voltage swing positive to negative Over the next 100 years since the discovery, there have been numerous advancements leading to the discovery of many superior piezo materials (i.e. The inverse piezoelectric effect is when voltage applied to some ceramic materials causes it to expand or contract as shown in Figure 1. French physicists Jacques and Pierre Curie discovered the effect in 1880.
Piezoelectric effect is when certain solid material is compressed under mechanical stress, and it develops a voltage potential by accumulating electrical charges.
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