BA Series Bender Actuators

BA6020 Piezo Bimorph Bender
BA6020 Piezo Bender

The BA Series are piezoelectric bimorph actuators poled in the parallel configuration. An insulated resin coating is applied to the external surfaces to protect the actuator and to eliminate electrical faults. The actuators can be wired in a three-wire or two-wire configuration as illustrated below.

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Specifications

Part Number BA3502 BA4902 BA6020
Deflection 0.6 mm 1.3 mm 2.6 mm
Force 0.07 N 0.1 N 0.5 N
Dimensions 35 x 2.1 mm 49 x 2.1 mm 60 x 20 mm
Thickness 0.6 mm 0.75 mm 0.8 mm
Free Length 28 mm 38 mm 53 mm
Voltage 0 to 150 V 0 to 200 V 0 to 150 V
AC Voltage +/-37 V +/-50 V +/-37 V
Capacitance 18 nF 20 nF 320 nF
Stiffness 233 N/m 154 N/m 380 N/m
Resonance Freq. 230 Hz 140 Hz 60 Hz
Mass 0.23 g 0.41 g 5 g

Electrical Connection

Piezo Bender Electrical Connection

The three wire configuration requires a single +200V supply; however, a bipolar configuration with a +/-100V supply is electrically equivalent. In the two-wire (AC) configuration, the maximum deflection and force is reduced by 30%.

Wires can be attached using conductive epoxy (Circuitworks CW2400) or standard solder and Rosin flux. After flux application, a one second contact with a 300C iron is recommended. The positive terminal is indicated by a red stripe.

Mounting

BA4902 Piezo Bender
BA4902 Piezo Bimorph Bender

Bimorph actuators can be mounted with a soft clamp or bonded to a base using an adhesive such as Araldite. The longest life time is achieved when soft materials such as rubber are used at the clamping surface. The recommended clamping length is 2mm for for the BA3502 and 5mm for the BA4902 and BA6020.

Electrical Current Requirements

Calculate Power Bandwidth

The required current is \( I = C \frac{dV}{dt} \) 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

The recommended drivers and connection diagrams are listed below.

Amplifier Application Configuration Voltage
PDu100B General purpose Two wire +/-50V
PDu100 Miniature Two wire +/-50V
PDm200B High performance Two or three wire +200V or +/-50V

Piezo Bender Connection Diagram

Options / OEM Customization

  • Custom range and dimensions
  • Custom wiring arrangement / connectors