Piezo d33

Piezoelectric d33

Operates as a Sensor and a Bonded Actuator with higher strain output and greater coupling efficiency

d33 Effect - Principle of Operation

Traditional 3-1 strain actuators have piezoceramic elements with electrodes on the top and bottom surfaces and are poled through the thickness. They expand and contract in plane, perpendicular to applied field, through the less dramatic piezoelectric 3-1 effect. In contrast, QuickPack IDE Actuators have a special interdigital electrode pattern, allowing the piezo element to be poled along its length. Because of this difference, QuickPack IDE Actuators exhibit piezoelectric properties that are over 50% higher than previously possible.

Custom Piezoelectric d33

Custom QuickPack actuators are available in a myriad of sizes and shapes.
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Piezo d33

QuickPack IDE Actuators represent a revolutionary new type of device: a surface-bonded actuator that works like a stack. Unlike traditional strain actuators that operate on the indirect piezoelectric 3-1 effect, QuickPack IDE Actuators operate on the stronger direct 3-3 effect, providing greater coupling efficiency and more output. QuickPack IDE Actuators operate directionally, providing the capability to control torsional motion in structures. Also, QuickPack IDE actuators have significantly higher electromechanical coupling than traditional piezoelectric strain actuators, giving them higher output for a given applied field. And like all QuickPack actuators, QuickPack IDE actuators encapsulate fragile piezoelectric elements in a protective skin with pre-attached electrical leads, making them easy to work with.

Principle of Operation

Traditional 3-1 strain actuators have piezoceramic elements with electrodes on the top and bottom surfaces and are poled through the thickness. They expand and contract in plane, perpendicular to applied field, through the less dramatic piezoelectric 3-1 effect. In contrast, QuickPack IDE Actuators have a special interdigital electrode pattern, allowing the piezo element to be poled along its length. Because of this difference, QuickPack IDE Actuators exhibit piezoelectric properties that are over 50% higher than previously possible.

Specifications

Application type:	strain actuator only
Device size (in):	2.05 x 1.19 x 0.015
Device weight (oz):	0.1
Active elements:	1 piezo wafer
Electrode spacing (in):	0.060 (center to center)
Electrode width (in):	0.015
Device capacitance (nF):	1.02
Full scale voltage range (V):	±1200
Full-scale longitudinal strain*:	(µε) ±347
Full-scale transverse strain*:	(µε) ±123

*Note: The QuickPack IDE has different properties in the longitudinal and traverse directions. In the longitudinal direction, the actuator takes advantage of the d33 effect, while transverse direction is excited by the less efficient d31 effect. Strains in the longitudinal and transverse directions are out of phase with each other, i.e., when the length increases, the width decreases, and vice versa. Because it is directional. the QuickPack IDE actuator must be oriented properly in order to achieve desired performance.

Quickpack 10ni Actuators

Directional strain output for torsion control. High coupling coefficients for passive piezo damping.

Quickpack IDE Actuators Have:

1. Interdigital electrodes
2. Poling oriented along the length
3. Directional (anisotropic) actuation
4. High 3-3 coupling coefficients

Versus Traditional Strain Actuators, Quickpack IDE

1. Actuators Have:
2. Higher strain per field
3. Directional strain output
4. Greater strain energy capture

Like Other Quickpack Actuators, Quickpack IDE Actuators Have:

1. No wires to solder
2. No solder joints to break
3. Protection against breakage during handling and installation
4. Resistance to microcracks during operation
5. Electrical insulation
6. Protection against moisture and the environment

Piezo d33

Bonded Configuration

Full scale strain, extension (µε): ±347

Comparison

Below is a comparison of Strain vs. Field between the IDE strain actuator, qp10ni, and a traditional 3-1 strain actuator, qp10n.