Mechano Transformer Corp.

PRODUCTS

Multilayer stacked piezoelectric actuator: by TOKIN

Multilayer piezoelectric actuators are ceramic elements for converting electrical energy into mechanical energy such as displacement or force by utilizing the piezoelectric longitudinal effect.
This multilayer stacked actuator is resin coated and can be applied on ultra-fine positioning mechanisms and drive sources.
Basic information is per the following, for reference purpose TOKIN’s catalogue can be downloaded from the button below.

Features

  • Highly responsive
  • High conversion efficiency from electrical to mechanical energy (approx. 60%)
  • High mechanical energy generation per unit volume (approx. 20 mJ per 1 cm³)
  • High output force (approx. 3500N per 1 cm² of cross sectional area)
  • Good energy source for mechanical transformer
  • Accurate positioning: Controllable in nm order
  • Low power consumption: Can be retained at the leakage current state (100μA or less)

TOKIN’s Multilayer Piezoelectric Actuator
Internal Structure Diagram

Applications

Positioning, Auto focusing of optical system, Pumps, Valves, Vibration source, Vibration controls, Sensors, Image stabilization of DSC, Mirror / Prism positioning, Manipulators, Motors, Printer, etc.

Specifications & Price

Product Applied Voltage 150V
(Max.)
Applied Voltage 100V
(Rec.)
Resonant
Frequency
(kHz)
Electrostatic
Capacitance
(μF)
** 
Insulation
Resistance
(MΩ)
Price
(JPY)*** 
Displacement
(μm)
Blocked force
(N)*
Energy
(mJ)*
Displacement
(μm)
Blocked force
(N)*
Energy
 (mJ)*
AE0203D04DF 4.6±1.5 237 0.55 3.0±1.5 155 0.23 261 0.09 100 5,700
AE0203D08DF 9.1±1.5 235 1.07 6.1±1.5 157 0.48 138 0.18 50 6,400
AE0203D16DF 17.4±2.0 224 1.95 11.6±2.0 150 0.87 69 0.35 50 7,600
AE0203D44H40DF 42.0±6.6 271 5.69 28.0±6.6 181 2.53 34 0.82 20 14,200
AE0505D08DF 9.1±1.5 978 4.45 6.1±1.5 656 2.00 138 0.75 50 11,400
AE0505D16DF 17.4±2.0 935 8.14 11.6±2.0 624 3.62 69 1.4 10 14,250
AE0505D44H40DF 42.0±6.6 1129 23.7 28.0±6.6 753 10.5 34 3.4 5 26,400
AE1010D16DF 18.4±3.5 3956 36.4 12.3±3.5 2645 16.3 69 5.4 5 39,000
AE1010D44H40DF 42.0±6.6 4515 94.8 28.0±6.6 3010 42.1 34 13.6 2 89,500
AE1414D16DF 18.4±3.5 7754 71.3 12.3±3.5 5183 31.9 69 10.8 2 150,000
AE2525D15DF 15.6±2.0 21000 163.5 10.1±2.0 13600 68.5 69 30.5 0.4 112,500
AE1020D44H40DF 42.0±6.6 9030 189.6 28.0±6.6 6020 84.2 34 27.2 - 168,000
AH10x12.5D50H40DF 48.5±6.6 6517 158.0 32.3±6.6 4345 70.2 34 27.0 - 192,000

Note

*The value was calculated based on the displacement value and Young’s modulus – 4.4 X 1010 N/m2

**Capacitance allowance: +/- 20% [Condition: f=1kHz, V=1Vms (<10μF); f=120Hz, V=1Vms (>10 μF)]

***Price stated does not include shipping cost and is negotiable if per order is greater than 50 units.

Dimensions

Outer Dimensions

Wire Dimensions

Unit: mm

  H W1 W2 W3 T1 T2 L Φd φD
AE0203D04DF 5±0.1 3±0.1 3.4Max 5.5Max 2±0.1 2.4Max 100 0.3 0.5
AE0203D08DF 10±0.1
AE0203D16DF 20±0.1
AE0203D44H40DF 40±0.1
AE0505D08DF 10±0.1 5±0.1 5.4Max 7.5Max 5±0.1 5.4Max
AE0505D16DF 20±0.1 0.5 0.8
AE0505D44H40DF 40±0.1
AE1010D16DF 20±0.1 10±0.1 10.4Max 12.5Max 10±0.1 10.4Max
AE1010D44H40DF 40±0.1
AE1414D16DF 20±0.1 14.2±0.1 14.6Max 16.7Max 14.2±0.1 14.6Max
AE2525D15DF 20±0.1 25.1±0.1 25.5Max 27.6Max 25.1±0.1 25.5Max
AE1020D44H40DF 40±0.1 20±0.1 20.4Max 22.5Max 10±0.1 10.4Max
AH10x12.5D50H40DF 40±0.1 12.5±0.1 12.9Max 15.0Max 10±0.1 10.4Max

Performance

Item Standard Conditions
Operating temperature range -25 to +85℃ When applied with a DC voltage: Ambient temperature When driven by an AC voltage: Ambient temperature + Temperature rise due to generated heat
Recommended Storage condition -5 to +40℃ / less than 40%R.H Recommend storage at room temperature.
No condensation.
Dissipation factor 5% or less  
Tensile strength 1/10 of generated force  
Temperature cycle test Displacement: Initial value ±20%
Capacitance: Initial value ±30%
tanδ: Less than initial rated value
Insulation resistance: 1MΩ or more
Appearance: No noticeable defect
Room temperature (3 min)
–25℃(30 min)
Room temperature (3 min)
+85℃(30 min)
Repetition of 10 cycles of the above

Characteristic Data
(Data source: TOKIN catalogue – Multilayer Piezoelectric Actuators)

Reliability Guidelines

Piezo actuators can be influenced by humidity as well as applied voltage and ambient temperature.
Reliability of Tokin’s multilayer piezoelectric actuators for static usage is represented by MTTF (mean time to failure). The following description is only based on obtained data.

DC voltage application

The MTTFr in actual applications is estimated using equation (1) below with MTTFs observed under accelerated condition as the reference value.

Pulse voltage application

Temperature rises when driven by pulse voltage as a result of heating due to dielectric loss of ceramics.
Therefore the element is less influenced by humidity. The effect is affected by the element shape, pulse waveform and frequency, which cannot be calculated by an equation as in the case of DC voltage application.
In TOKIN’s testing on the AE0203D08, there was no failure confirmed after 0-150V rectangular pulse wave applied with 500Hz for 500 hours (equivalent to 900 million pulses applied).

Caution: Physical damage may occur due to ringing phenomenon caused by fixed method of the element and voltage rise speed.

User Guidelines

* For reliability purposes, avoid handling these piezoelectric actuators (resin-coated) with bare hands, avoid excessive physical shock, and store preferably in a dry atmosphere (below 40% RH) at ordinary temperatures (-5 to +40oC), without vibration. Avoid condensation on the product surface.

* Center axis of generated displacement to be aligned with the center axis of the load. Axis of the generated displacement to be vertical to the mounting surface.

* Prevent from being bent, twisted, tensile force applied (including the lead wire), as well as physical shock.
 Reference: Guide for tolerance of twisting and tension

Reference value Remarks
Twisting force 3 X 10-1 N.m or less For an actuator which generates a force of 800 N (compression resistance)
Tension 50N or less

* If the actuator is exposed to high temperature above 100oC or it is used after long storage period (more than 3 months), it should by polarized using the circuit configuration and conditions shown below.

* Epoxy-based adhesives with high rigidity and minimum thickness are recommended for bonding. Do not form adhesives at the side of actuator.

* For thermosetting resin, perform polarizing treatment (mentioned above) again after the adhesive is settled.

Electrical connection and handling precautions

Electrical connection

Connect the red lead wire to the positive (+) terminal of the power supply. Also prevent reverse voltage application.

Handling precautions

Basically the voltage controls the aimed displacement and generated force.
・In driving, it is also necessary to take ringing due to the resonance or hysteresis of the element itself into consideration. Driving the actuator so that the rising speed is more than 3 times as much as the resonance period to prevent the device from ringing damage.
・In pulse driving, it is further necessary to pay sufficient attention to heat generation due to dielectric loss, charge/discharge current due to the capacitive component and the power output impedance as well.

Generate force and load relation

Static load: No load value change when actuator moves

Fluctuating load: Load value changes by spring reaction when actuator moves.

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