Advantages of Piezoelectric Actuators
A piezoelectric actuator can produce extremely fine position changes down to the subnanometer range. The smallest changes in operating voltage are converted into smooth movements. Motion is not influenced by striction/friction or threshold voltages.
Large Force Generation
Piezoelectric actuators can generate a force of several 10,000 N. PI Ceramic offers units that can bear loads up to several tons and position within a range of more than 100 µm with sub-nanometer resolution.
Piezoelectric actuators offer the fastest response time available. Microsecond time constants and acceleration rates of more than 10,000 g’s can be obtained.
No Magnetic Fields
Piezoelectric actuators are especially well-suited for applications where magnetic fields cannot be tolerated. For extreme requirements, PI Ceramic is able to deliver assemblies which have no measurable remnant magnetism.
Low Power Consumption
The piezoelectric effect directly converts electrical energy into motion, absorbing electrical energy during movement only. Static operation, even holding heavy loads, does not consume power.
No Wear and Tear
A piezoelectric actuator has neither gears nor rotating shafts. Its displacement is based on pure solid-state effects and exhibits no wear and tear. PI Ceramic has conducted endurance tests on actuators in which no change in performance was observed after several billion cycles.
Vacuum and Clean-Room Compatible
Piezoelectric actuators employ ceramic elements that do not need any lubricants and exhibit no wear or abrasion. This makes them clean-room compatible and ideally suited for ultra-high-vacuum applications.
Operation at Cryogenic Temperatures
The piezoelectric effect is based on electric fields and functions down to almost zero kelvin, albeit at reduced specifications.
Design of a PZT stack actuator
Parallel bimorph and serial bimorph