Magnetic fluid actuator


An actuator that uses magnetic fluid.

Magnetic fluid is a colloidal solid-liquid mixed fluid that can be obtained by dispersing a large amount of fine magnetic particles in the dispersion medium fluid. When a magnetic field is applied to a flexible container filled with the magnetic fluid, the container changes its shape depending on the magnetic field strength, wherefrom mechanical output can be derived. Characteristics of the magnetic fluid actuator are: 1) electrically controllable and energy can be supplied externally without contact, 2) no mechanical sliders are used, and 3) no risk of leak of fluid is imposed. Application examples of magnetic fluid actuators to micro-valves and micro-pumps have been reported.


[Related Terms]
Microvalve, Micropump