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.
Series R 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 R piezo actuators are without casing, and without a pre-load. They are only connected at the ceramic top and ground plate. These ring actuators (without a pre-load) should not be used in dynamic applications.
Series R actuators are for open-loop systems only.
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)
3 Example Products
UNIT
R 12/14
R 25/20
R 50/20
Part #
P-401-00
P-404-00
P-406-00
Motion Open-Loop (±10%)*
μm
12
25
50
Capacitance (±20%)**
μF
2.9
12
24
Stiffness
N/μm
160
160
80
Resolution Open-Loop***
nm
0.03
0.05
0.1
Dimensions – Height
mm
13.5
27
54
Outer Diameter
mm
14
20
20
*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.
The new PAHS piezo actuators achieve higher motion than a conventional actuator of similar length. With more than four times higher travel they are a perfect solution when space is limited but high resolution requirements exist.
PAHS actuators operate with the same voltage band of 150V and can therefore be easily integrated into existing systems using the same controllers.
Like PAHL piezo actuators, PAHS actuators have high blocking forces and can move large masses. Due to the integrated mechanical pre-load, they can work under tensile forces and in dynamic applications. They also have high resonant frequencies guaranteeing fast settling times.
Technical Data
(See Datasheet PDF below this chart for the complete list of product specifications)
Models
UNIT
PAHS 40
PAHS 240
Part #
P-181-00
P-186-00
Motion @ -20…130V*
μm
40
240
Capacitance **
μF
3.5
21
Resolution OL***
nm
0.09
0.54
Dimensions – Length
mm
46
91
Diameter
mm
20
20
*Typical value measured with 0.3mV controller. **Typical value for a small electrical field strength. ***Typical values, measured at -20V…+130V.
hpower-HPSt-10-5-Datasheet.pdf (329 KB)
