Piezo Actuators

Piezo Motors and Stages

Piezo ActuatorsOverviewStepping Piezoelectric Actuators (SPA) are new long-stroke linear or rotating piezoelectric motors for micro/nano positioning applications benefiting from proven APA® heritage. They operate by accumulation of small steps. The motion can be...

Piezo Drivers and Controllers

Piezo ActuatorsOverviewTo fulfill various requirements in terms of driving and control conditions for its piezo actuators (static, pulse, dynamic), CEDRAT TECHNOLOGIES has developed 3 different families of standard drivers: CA45: Low cost, compact (1 channel)...

Piezo Actuator Mechanisms

Piezo ActuatorsOverviewMainly based on the APA® concept, CEDRAT TECHNOLOGIES has developed different mechanisms in order to fulfill its customers’ requests for several degrees of freedom kinematics. These mechanisms take advantage of the APA® concept offering a...

Amplified Piezoelectric Actuators (APA®)

Piezo ActuatorsOverviewPatented by CEDRAT TECHNOLOGIES, the Amplified piezoelectric actuator, is a mechanical magnified preloaded stack of low voltage piezoelectric ceramics (MLA). The mechanical amplification is obtained thanks to an external elliptical shell made of...

Parallel Pre-stressed Actuators (PPA)

Overview

The PPA is a preloaded low voltage piezoelectric actuator using a direct-acting multilayer ceramic stack (MLA).

Most conventional Direct Piezo Acutators use an MLA preloaded by Belville washers on the end of the stack, enclosed in a rigid case. The PPA design, however, obtains its preload (or pre-stress) from an external spring frame made of stainless steel which protects the MLA against tensile force and provides convenient mechanical interfaces for the user. The PPA is lighter and more compact than competing designs, making mechanical integration easier. The pre-stressing frame applies an optimal preload force to the MLA stack which ensures a longer lifetime, lower noise and significantly improved dynamic performance.

Three series (M, L, XL) of PPAs are available in order to meet the different needs in terms of stroke, force and dimensions.

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