Mechanical impacting is involved in many technical process such as demolition of concrete by chiseling, structure borne sound analysis, impact-echo analysis of extended structures, characterization of material properties at high strain rates, and indentation hardness tests.
To generate an impact a hard-mass body is accelerated during a starting phase (e.g. a hammer head) and collides with a hard counterpart (e.g. chisel) within μs.
The starting and contact phases of an impact scenario are difficult to be exactly reproduced. Common setups of precision impact measurement do not allow high repetition rates. Another challenge is the precise timing of the impact. Meanwhile composite materials require more and more accurate testing methods. hpower shock generators follow a different approach. Our piezo technology uses an adaptive impact generation principle, where impact parameters and timing are controlled by electrical driving conditions. Thus – hpower shock piezo actuators have advantages over traditional solutions.
Speed and power are a potent combination that is often hard to achieve simultaneously. In most cases, one needs to be sacrificed to achieve the other. To achieve both, traditional solutions need to combine different technologies, such as hydraulics and mechanical drives that takes up space and comes at great expense.
With our PiSha shaker series, we take our energy dense, high powered systems and compact them further into stiff, superbly dynamic systems. Hpower shakers deliver speeds up to 100kHz, while maintaining force capabilities up to 10kN, all under 100mm in length. These systems all preloaded and encased to allow for top performance in highly dynamic running conditions. These piezo actuators are often used in for applications such as HALT (Highly Accelerated Lifecyle Testing) for small electronic components such as MEMS, and other forms of materials testing.
hpower shake piezo actuators can work very fast. They have the capability to generate high force modulations and can move high masses. To achieve the best results and best technical parameters hpower shake actuators have to be optimized for every application. There are no off-the-shelf (standard) actuators for these high-end technical solutions.
Technical Data
(See Datasheet PDFs below this chart for the complete list of product variations)
Ring type actuators are based on an open-center cylindrical design. Compared with stack type actuators, ring actuators have a higher bending stability, better heat management efficiency and allow access to the system’s axis. Given the same volume of PZT material, a ring actuator has a larger total diameter, which results in an increase in stability against bending and buckling forces applied to the actuator. Their overall larger surface also removes heat quicker from the system, which allows them to run at much higher frequencies than stack type actuators without overheating. The hpower ring series is offered with or without preload, and with or without optional casing.
Our ring actuators can achieve a motion range of up to 130µm, while generating maximum forces of up to 35kN.
The hpower rings can be customized with low temperature modification, thermostability and cooling options and even an axial cable exit, giving you more freedom and flexibility with your application design.
Technical Data
(See Datasheet PDFs below this chart for the complete list of product variations)
hpower solid stack actuators are comprised of our smart PZT ceramics, optimized to deliver high power with dynamic performance. hpower stack actuators are unique with a disk layering design, and serve as the straight forward solution to many applications. These actuators feature a motion range up to 260 µm and higher upon request – with forces up to 50kN.
All of our piezo actuators have both encased and bare stack options, with and without a preload. Preloaded actuators allows for increased dynamic capabilities by protecting the system from problematic tensile forces. Encasing the actuators also protects them from the environment, and can be augmented to allow for operation in vacuum conditions and increased thermo-stability for longer run times. All of our actuators can also have acceleration/force measurement and position systems integrated.
The PSt series comes without casing and without a preload. The PSt VS series comes with casing and with a preload. There is a wide variety of hpower high-power piezo actuators (stacks and rings) available for applications such as materials testing and shock generation.
Technical Data
(See Datasheet PDFs below this chart for the complete list of product variations)
Series RA ring actuators consist of a large number of contacted ceramic discs. Compared with a tube actuator, the ring actuator reaches a higher stiffness and the expansion is twice as high.
Series RA piezo actuators are encased, and also include a mechanical pre-load so they can be used in dynamic applications.
Series RA actuators are available for open-loop systems, and closed-loop (strain gauge) systems.
Please ask for a screwing top plate for easy mounting of mirrors.
Technical Data
(See Datasheet PDFs below this chart for the complete list of product variations)
4 Example Products
UNIT
RA 12/24
RA 50/35
RA 12/24SG
RA 50/35SG
Part #
P-401-10
P-406-10
P-401-11
P-406-11
Motion Open-Loop (±10%)*
μm
12
50
–
–
Motion Closed-Loop (±0.2%)
μm
–
–
10
40
Capacitance (±20%)**
μF
2.9
24
2.9
24
Stiffness
N/μm
160
80
160
80
Resolution Open-Loop***
nm
0.03
0.1
–
–
Resolution Closed-Loop
nm
–
–
0.5
2.0
Dimensions – Length
mm
36.5
70.5
36.5
70.5
Outer Diameter
mm
24
35
24
35
*Typical value measured with an NV 40/1 CLE amplifier. **Typical value for small electrical field strength. ***The resolution is only limited by the noise of the power amplifier.
