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General piezo symbols

 

 

Symbol

Description

    Unit       

Generel/

Noliac

A

Electrode surface area

  mm2

N

c

Stiffness coefficient

  N/m2

G

C

Capacitance

 F

G

d

Piezoelectric charge coefficient

C/N

G

f

Frequency

Hz

G

f max Maximum frequency

Hz

N

fa

Anti resonance frequency

Hz

G

fr

Resonance frequency

Hz

G

Fb

Blocking force

N

N

F dyn Dynamic Force N

N

g

gravitational constant

kg m / s2

G

gij

Piezoelectric voltage coefficienct

V•m/N

G

H

Height

mm

N

I

Current

A

G

Iavg Average Current A

N

Imax Maximum Current A

N

IE

Current Closed Circuit

V

N

ID

Inner diameter

mm

N

k

Coupling factor

 

G

k Stiffness of actuator mm/N

N

K0

Spring constant

mm/N

N

K

Relative dielectric constant

 -

G

l0 Nominal Displacement m

N

L

Length

mm

N

Lc

Clamping length (on plate benders)

mm

N

∆L

Maximum free displacement

µm

N

m

Mass

kg

N

meff Effective Mass kg

N

n

Number

-

N

N

Frequency constant

Hz•m

N

OD

Outer diameter

mm

N

ODm

Maximum outer diameter

mm

N

P

Power

W

G

Q

Charge

C

G

Qm

Mechanical factor

 -

G

s

Elastic compliance

M2/N

G

s

Stroke

µm

N

t

Time

s

G

tp

Minimum rising time in pulsed operation

s

N

tr

Period time of actuator's resonance

s

N

t0

Arbitrary time when measurement started

s

N

tan δ

Dissipation factor

 -

G

T

Thickness/ height of internal ceramic layers

µm

N

Tc

Curie temperature

°C

G

Y

Youngs modulus

N/m2

G

U

Voltage

V

N

Upp

Voltage peak to peak

V

N

UD

Voltage Open Circuit

V

N

W

Width

mm

N

Wm

Maximum Width (including external electrodes)

mm

N

ε0

Permittivity of free space

8,854 • 10-12 F/m

G

εT

Permittivity

F/m

G

ρ

Density

g/mm3

G

 

 

Subscript:

 

31 = direction perpendicular to polarisation field

33 = direction parallel to polarisation field

m = maximum

scma = Stacked Ceramic Multilayer Actuator

cma = Ceramic Multilayer Actuator

0 = original

in = in / beginning

p = planar (f.ex. coupling factor)

t = thickness/ height (f.ex. coupling factor)

b = blocking force

 

Superscript:

 

D = Open Curcuit

E = Closed Circuit

More information

Please contact:

Sales

Tel.: +45 4912 5034

 

 

 

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Modification or disassembly of Noliac products or any software connected is at the customers’ own risk and leads to the exclusion of warranty rights towards Noliac.

 
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