Piezocomposite actuators Piezos for high forces! Faster than resonant frequencies! ■ high forces up to 70 kN ■ resonant frequencies up to 60 kHz ■ variable lengths from millimeters to meter incredibly precise

1 Piezocomposite actuators Piezocomposites are linear high load actuators designed in a discrete joining technology. Their advantages lay in high force generation and high stiffness. Another key advantage is the ability to use a variable selection of piezo-ceramics. With these varieties in design and material, piezocomposite actuators can be used in many applications. Applications of piezocomposite actuators Piezocomposite actuators are used for:  shakers active vibration damping  shock wave generation  material testing  short impulse excitation  Features Features of piezocomposites (compared...

Image 2: Pulse shape of an impulse generator with a symmetrical arrangement. Image 3: Typical double-pulse shape with a seismic mass. PIA-electronics - requirements of the electronic High Voltage Pulser HVP Controller  high pulse currents up to 400 A µs accurate triggering  peak power up to 400 kW  rise times in the µs-range  The basic principle of the HVP amplifier is the following: A capacitor (multiple 100 µF) is charged with a desired voltage. The capacitor will be disconnected from its power supply and suddenly discharged through the piezoshock generator. Currents reach several hundred...

3 Piezoelectrical PiSha Shakers  frequency up to 100 kHz (depending on the shakers configuration) compact dimensions down to mm range are available management for high dynamics. Operating principle of piezoeletric shakers Piezo shakers convert the electrical excitation signal directly into a motion. The amplitude is set by the operating voltage, velocity and maximum frequency are depending on the current. The internal structure of the shaker is adapted to the occurring high forces, pressures and accelerations. So the shaker achieves a reliable operation under oscillation at a continuous load....

Geo-Shaker: for vibration excitation of the ground and of buildings   coupling to the ground via base plate force-generation: reaction/acceleration forces in conjunction with seismic masses power electronics: amplifier RCV 1000/7 (peak power 7 kW) voltages up to 1000 V seismic mass up to 200 kg (depending on the frequency tuning) max. amplitude vibration 80 microns max. force modulation ca. +/-15 kN basic response: typically at 200 Hz (depending on the seismic mass) Image 6: Geo-Shaker with test object. Micro-Shaker: Ring type  mounting arrangement by clamps or as seismic response type  working...

4 Product range4.1 Stack type actuatorsPSt series - stack type actuators without casing and without preload ■ maximum force generation up to 50'000 N ■ temperature range from -60 °C up to +200 °C electrical capacity [nF] further versions at www.piezosystem.com/piezocomposite PSt 1000/35/60 80/60 54 2500 600 PSt VS series - stack type actuators with casing and with preload ■ maximum force generation up to 50'000 N ■ ideally suited for dynamic application due to high preload ■ temperature range from -60 °C up to +200 °C further versions at www.piezosystem.com/piezocomposite PSt 1000/35/150...

HPSt VS series - ring type actuators with casing and with preload ■ free inside aperture ■ with internal preload: ideally suited for optical applications with high dynamics ■ also available as 500 V version with diameters 10-5 and 15-8 electrical capacity [nF] further versions at www.piezosystem.com/piezocomposite HPSt 1000/35-25/80 VS45 105/80 89 1300 250 4.3 Piezo amplifiers 1 and 3-channel-amplifier SVR1000 - up to 1000 V ■ for static and quasi-static applications ■ max. current 8 mA ■ low noise (~1 mV at 0.47 pF load) ■ manual control of DC-offsets ■ also available as ±350 V bipolar...

Zweite Formel für die englische Broschüre: 1 · V · Yceramic · d33 · E 2 2 W: energy content (up to several Joule) V: volume (up to 100 cm³) Yceramic: Young’s modulus of the ceramic material (4 … 5 · 1010 N/mm²) d33: piezo electric charge constant (approx. 700 C/N) E: electric field strength (up to 2 kV/mm) W = In dynamic applications the generation of tensile andErste Formel: pressure forces depends on the acceleration. For a sinusoidal input signal the following formula applies: d2 s = m · s · 4π 2 f 2 · sin(2πf t) ˆ dt2 F = force ŝ = amplitude m = moved mass f = working frequency a = acceleration...