BA4902/BA3502/BA6020 Insulated Bender
Piezoelectric Insulated Bending Actuators
|Dimensions||49 x 2.1 mm||35 x 2.5 mm||40 x 10 mm||60 x 20 mm|
|Deflection||+/- 0.65 mm||+/- 0.35 mm||+/- 0.55 mm||+/- 1.3 mm|
|DC Voltage||0 to 150V||0 to 150V||0 to 150V||0 to 150V|
|AC Voltage||+/- 37V||+/- 37V||+/- 37V||+/- 37V|
|Thickness||0.80 mm||0.80 mm||0.80 mm||0.80 mm|
|Capacitance||20 nF||18 nF||110 nF||320 nF|
|Resonance Freq||140 Hz||230 Hz||250 Hz||60 Hz|
|Free Length||42 mm||28 mm||33 mm||53 mm|
The BA4902 is a piezoelectric bimorph actuator 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.
The three wire configuration requires a single +200V supply; however, a bipolar configuration with a +/-100V supply is electrically equivalent. In the two-wire configuration, the maximum deflection and force is reduced by 30%.
Bimorph actuators can be mounted with a clamp or bonded to a base using an adhesive such as Araldite. Wires are soldered to the electrodes with a one second contact at 300 degrees C. The use of a rosin flux will improve the bond. The positive terminal is indicated by a red stripe.
Electrical Current Requirements
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:
Where Vp-p is the peak-to-peak voltage. For a triangle wave, the required peak current is:
The recommended drivers and connection diagrams are listed below.
|PDu100b||General Purpose||Two Wire||+/-50V|
|PDm200B||High Performance||Two or Three Wire||+200V or +/-50V|
- Custom range and dimensions
- Custom wiring arrangement/connectors
- Wires Attachment