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TTR wires for actuator

How to Use

Ni-Ti SMA wire expands and contracts between its Martensite and Austenite (phase) transformation. It is achieved by heating the SMA wire under a fixed load. Ni-Ti with its high electrical resistance, SMA wire can be heated simply by applying electric current. On and off of current, wire contracts and expands, its cycle form an actuation device.




Advantages

  • Easy to actuate - simply apply an electric current
    →Helps to make your system small, light, simple
  • Lightweight but High Output
  • Power & Speed of actuation are controllable by the current applied
  • Silent and smooth actuation
* Patent:JPN3956613


Property
Alloy types Product name Diameter (μm) Electric
resistance
(R.T.)
(W/m)
Min. current
to move
(R.T.)
(mA)
Time(R.T.) Max.
actual
load
(gf(MPa))
Max.
actual
strain
%
Contraction
(sec)
Expansion
(sec)
Ni-Ti NT-
 M3-
  TTR
50 400 110 0.3 0.7 60(300) ~5
100 100 300 0.6 2.5 200(250)
200 25 700 1.5 7.0 640(200)
Ni-Ti-Cu NT-
 H5-
  TTR
50 550 90 0.3 0.8 70(350) ~5
100 140 240 1.0 2.5 240(300)
200 35 600 2.0 8.0 800(250)
NT-
 H7-
  TTR
50 550 90 0.5 1.0 80(400) ~5
100 140 200 1.0 3.0 280(350)
200 35 500 2.5 9.0 960(300)
** ** Above data are for your reference only, not a guarantee of performance. Actual electric current required for an actuation and the actual duration of an actuation vary according to the surrounding temperature and air-flow conditions of the test. Actual recoverable performance varies according to the fixed load and electric current flow of the test.


Strain Temperature curves by constant load test

   
 

Effect of electrical current on the strain change (by constant load 200MPa at R.T. )

   
 

Transformation temperatures (Af, Mf) change with load


Effect on strain change by thermal cycles.

S-N curve for breakage



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