Nitinol Actuators by Miga Technologies LLC

Using Nitinol or Flexinol to replace Solenoids

All of the actuators below can be used to actuate solenoids. An SMA powered solenoid can be many times smaller and lighter than an elecotro-magnet powered solenoid. SMA powered solenoids will also use a small fraction of the power.

Solenoids are much heavier than nitinol actuators for comparable force output. Solenoids are also ON/OFF devices, and do not have speed, force, or position control. All of which are possible with nitinol actuators. Nitinol actuators also produce a constant force throughout the entire stroke, while the output force of a solenoid drops dramatically after the first 10% of motion

High Force Valve Actuator

High Force Valve Actuator

This prototype actuator was designed to provide 24 pounds of force and 3/8" of stroke. There is a U-shaped Nitinol wire actuator on each side of the PCB (only one is currently installed), and they operate on a shared linkage. The SMA wire used here was 0.020"...

Pulley Valve Nitinol Actuator

Pulley Valve Nitinol Actuator

This is a high force linear actuator with a single SMA wire wound around pulleys to provide high force. Pulley Valve Actuator Test Clockwise 90deg turn 230 Newtons Pulley Valve Actuator Clockwise and Counterclockwise turns, 15 pound lift, 64 watts of power input Close...

Nitinol Pneumatic Cylinder Replacement

Nitinol Pneumatic Cylinder Replacement

This long stroke, high speed, prototype SMA actuator was designed for Sony to remove DVD's that did not pass quality control from an assembly line. Mineral oil is used in the body of this actuator to enhance cooling of the Nitinol. This actuator features 8" of 0.010"...

Haptic Force Feedback using a Wireless Solenoid

Haptic Force Feedback using a Wireless Solenoid

This video illustrates how a thin film force sensitive resistor can provide haptic feedback through the use of printed coils and a fixed magnet. 1.5 mm thin printed coils are energized when force in the resistor exceeds a given threshold. That causes the resistor and...