Amplified Piezoelectric Actuators

The AP family of high-displacement actuators utilize an advanced flexural mechanism and high performance piezoelectric stack actuators to provide an exceptionally large range of motion, fast response, and sub-nanometer resolution. The advanced dual-hinge flexure mechanism significantly outperforms competing devices due to its significantly higher in-plane and out-of-plane stiffness, greater mechanical efficiency, and higher resonance frequency. The dual-hinge flexure design also results in extremely compact dimensions.

Applications include: Nanopositioning, Biomedical, Microscopy, Precision machining, Vibration control, High-speed valves, and Optics. A range of standard devices are available for immediate delivery, however, custom dimensions and travel ranges can be produced with a four-week lead time.

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AP Series Amplified Piezoelectric Actuators
Order Code Range Force Resonance Buy Now
AP120 120 um 11 N 900 Hz Buy Now
AP350B 350 um 6 N 400 Hz Out of stock
AP340 340 um 16 N 460 Hz Buy Now
AP350 350 um 18 N 480 Hz Out of stock
AP830 830 um 90 N 230 Hz Out of stock

AP120 – 120um Range

AP120 – 120um Range 800w
Displacement >120 um
Voltage -15V to +150V
Unipolar Disp. >110 um
Resonance 900 Hz
Force 11 N
Stiffness 0.10 N/um
Capacitance 400 nF
Mass 5 g
3D Model AP120.igs

Dimensions (Click to enlarge)

AP120 Dimensions

AP350B – 350um Range, Small Size

AP350B – 350um Range, Small Size
Displacement >350 um
Voltage -15V to +150V
Unipolar Disp. >320 um
Resonance 400 Hz
Force 6 N
Stiffness 0.019 N/um
Capacitance 900 nF
Mass 7 g

Dimensions (Click to enlarge)

AP350B Dimensions

AP340 – 340um Range

AP340 – 340um Range 800w
Displacement >340 um
Voltage -15V to +150V
Unipolar Disp. >310 um
Resonance 460 Hz
Force 16 N
Stiffness 0.052 N/um
Capacitance 780 nF
Mass 8 g

Dimensions (Click to enlarge)

AP340 Dimensions

AP350 – 350um Range

AP350 – 350um Range 800w
Displacement >350 um
Voltage -15V to +150V
Unipolar Disp. >320 um
Resonance 480 Hz
Force 18 N
Stiffness 0.057 N/um
Capacitance 900 nF
Mass 9 g
3D Model AP350.igs

Dimensions (Click to enlarge)

AP350 Dimensions

AP830 – 830um Range

AP830 – 830um Range 800w
Displacement >830 um
Voltage -15V to +150V
Unipolar Disp. >750 um
Resonance 230 Hz
Force 90 N
Stiffness 0.12 N/um
Capacitance 8.3 uF
Mass 60 g
3D Model AP830.igs

Dimensions (Click to enlarge)

AP830 Dimensions

Quality / Testing

Each actuator is individually tested for displacement range, blocking force, and resonance frequency. A test report is provided with each delivery.

Mounting

The AP actuators can be mounted in a fixed-free or free-free configuration using the threaded mounting holes. When a voltage is applied, a proportional expansion is developed in the vertical direction, as illustrated below.

ap mounting 400w

Tension Force

The maximum tension force is 10% of the blocking (compressive) force.

Range

The range is specified for an applied voltage of -15V to +150V. The unipolar range is from 0V to +150V.

When an amplified actuator is driving a spring, the range is reduced by the factor $$\frac{k_a}{k_a+k_L}$$ where \(k_a\) is the actuator stiffness and \(k_L\) is the load stiffness.

Capacitance

The actuator capacitance is the small-signal capacitance measured at room temperature. Due to hysteresis, the effective capacitance increases with applied voltage. When operating at full range, the effective capacitance is approximately twice the small-signal capacitance. The capacitance also increases with temperature. A temperature increase of approximately 50 degrees C will double the effective capacitance.

Electrical Current Requirements

Calculate Power Bandwidth

The required current is \( I = C~ dV/dt \) where \( I \) is the current, \( C \) is the effective capacitance, and \( dV/dt \) is the voltage rate of change. For a sine-wave, the required peak current is equal to: $$ I_p = \pi C f V_{p-p} $$ where \( V_{p-p} \) is the peak-to-peak voltage. For a triangle wave, the required peak current is equal to: $$ I_p = 2 C f V_{p-p} $$

 

Recommended Drivers

Amplifier Application
PDm200B General purpose, low cost
MX200 High Current, Low noise, low cost
PDu150 Ultra-low noise
PD200 High speed, low noise
PX200 High current, low noise

Vacuum Compatibility

The AP Actuators and wiring insulation meet the outgassing requirements for NASA SP-R-0022A.

Customization

Custom dimensions and travel ranges can be produced with a four-week lead time.