# AP Series Amplified Piezoelectric 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.

Order Code Range Force Resonance $AU Buy Now AP120 120 um 11 N 900 Hz$1063 Buy Now
AP350B 350 um 6 N 400 Hz $1221 Out of stock AP340 340 um 16 N 460 Hz$1151 Buy Now
AP350 350 um 18 N 480 Hz $1160 Out of stock AP830 830 um 90 N 230 Hz$1683 Out of stock

### AP120 – 120um Range

 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)

### 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)

### AP340 – 340um Range

 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)

### AP350 – 350um Range

 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)

## AP830 – 830um Range

 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)

### 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.

### 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.

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