Piezo Bimorphs features:
- Low-Voltage Bimorph Benders with 150 V Max Voltage
- Sub-Millisecond Response Time
- ±450 µm Maximum Displacement
- Available with or without Holder
- low power consumption
- small and lightweight
- single PZT layer or two PZT layers
- low cost and moderate price
- custom design capability
- fast delivery
hese Piezoelectric Benders provide a tip deflection whose magnitude and direction is a function of the applied bias voltages. They are found in applications such as wire bonding, electrical switches, beam deflection, valves, and acceleration sensors. The benders are constructed of multiple, co-fired piezoceramic layers, in which the voltage bias across the top half of the layers is controlled independently of the voltage bias across the bottom half of the layers. The length of the layers increases as the voltage applied across them increases. Tip deflection of the bender occurs when the top and bottom sets of layers elongate by different amounts. For example, downward displacement of the bimorph bender occurs when the top layer elongates while the length of the bottom layer remains the same. These bimorph benders can provide displacement up to ±450 µm.
Electrical connections to the three electrodes are located on the top surface, and each electrode is connected to a wire lead; the electrode connected to the red lead should always be positively biased and is marked with a silver plus sign. Providing different bias over these two sets of layers enables deflection in either direction. Do not apply a voltage bias in excess of 150 V between any two leads, as this can damage the bender.