CEDRAT Parallel Pre-stressed Actuators Specifications
CEDRAT Piezoelectric Actuators
The parallel pre-stressed actuator is a preloaded stack of low voltage piezoelectric ceramics (MLA). The preload (or pre-stress) is obtained from an external spring frame made of stainless steel which protects the MLA against tensile force and provides mechanical interfaces for the user allowing an easier integration. This prestressing frame applies an optimal preloading force to the MLA which ensures a longer lifetime and better performance with dynamic applications than traditional preloaded actuators.
Designed by CEDRAT TECHNOLOGIES, this new direct piezo actuator results from contracts carried out for CNES, the French Space Agency. The PPA model is lighter than the compacting Direct Piezo Actuator, with the same electromechanical properties. Its compact size also makes integration easier in mechanical assembly.
Three series of PPAs are available (M, L, XL) in order to meet the different needs in terms of stroke, force and dimensions:
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PPA10M
Smallest size version of the Parallel Pre-stressed Actuator M series
Stroke: 9µm
Blocked Force: 800N
Resonance Freq: 60800Hz (unloaded)
Dimensions (mm): 18x10x9
Options: Strain Gauge; Non magnetic; Vacuum; High Temperature; Specific Interface
Status: Standard Product
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PPA20M
Middle size version of the Parallel Pre-stressed Actuator M series
Stroke: 20µm
Blocked Force: 800N
Resonance Freq: 38500Hz (unloaded)
Dimensions (mm): 28x10x9
Options: Strain Gauge; Non magnetic; Vacuum; High Temperature; Specific Interface
Status: Standard Product
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PPA40M
Biggest size version of the Parallel Pre-stressed Actuator M series
Stroke: 36µm
Blocked Force: 800N
Resonance Freq: 23400Hz (unloaded)
Dimensions (mm): 48x10x9
Options: Strain Gauge; Non magnetic; Vacuum; High Temperature; Specific Interface
Status: Standard Product
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PPA40L
Smallest size version of the Parallel Pre-stressed Actuator L series
Stroke: 45µm
Blocked Force: 3500N
Resonance Freq: 14300Hz (unloaded)
Dimensions (mm): 57x23.5x18
Options: Strain Gauge; Vacuum; High Temperature; Specific Interface
Status: Standard Product
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PPA60L
Middle size version of the Parallel Pre-stressed Actuator L series
Stroke: 70µm
Blocked Force: 3500N
Resonance Freq: 10900Hz (unloaded)
Dimensions (mm): 77x23.5x18
Options: Strain Gauge; Vacuum; High Temperature; Specific Interface
Status: Standard Product
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PPA80L
Biggest size version of the Parallel Pre-stressed Actuator L series
Stroke: 94µm
Blocked Force: 3500N
Resonance Freq: 8840Hz (unloaded)
Dimensions (mm): 97x23.5x18
Options: Strain Gauge; Vacuum; High Temperature; Specific Interface
Status: Standard Product
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PPA120L
Biggest size version of the Parallel Pre-stressed Actuator L series
Stroke: 130µm
Blocked Force: 2957N
Resonance Freq: 13191Hz (unloaded)
Dimensions (mm): 137x23.5x18
Options: Strain Gauge; Vacuum; Specific Interface
Status: Standard Product
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PPA40XL
Smallest size version of the Parallel Pre-stressed Actuator XL series
Stroke: 44µm
Blocked Force: 7000N
Resonance Freq: 13600Hz (unloaded)
Dimensions (mm): 60x30x30
Options: Strain Gauge; Vacuum; Specific Interface
Status: Standard Product
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PPA80XL
Middle size version of the Parallel Pre-stressed Actuator XL series
Stroke: 91µm
Blocked Force: 7000N
Resonance Freq: 8500Hz (unloaded)
Dimensions (mm): 100x30x30
Options: Strain Gauge; Vacuum; Specific Interface
Status: Standard Product
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PPA120XL
Biggest size version of the Parallel Pre-stressed Actuator XL series
Stroke: 128µm
Blocked Force: 7000N
Resonance Freq: 6180Hz (unloaded)
Dimensions (mm): 140x30x30
Options: Strain Gauge; Vacuum; Specific Interface
Status: Standard Product
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