AP Series Amplified Piezoelectric Actuators

AP Amplified Piezo Actuators

The PiezoDrive AP Series 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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AP120 - 120um Range

AP120 Amplified Piezo Actuator

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

AP350B - 350um Range, Small Size

AP370B Amplified Piezo Actuator

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

AP340 - 340um Range

AP340 Amplified Piezo Actuator

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

AP350 - 350um Range

AP350 Amplified Piezo Actuator

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

AP830 - 830um Range

AP830 Amplified Piezo Actuator

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

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.

Amplified Piezo Actuator Mounting

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: $$ I_p = 2 \pi f V_{p-p} $$ 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.