Modeling, design and control of high-speed powerful solenoid based on giant magnetostrictive material

A high-speed powerful solenoid using magnetostrictive material, Terfenol-D has been designed and built. The mechanical structure design, lump parameter electrical-mechanical dynamic model and control method were presented. The prototype of the solenoid is 55 mm in diameter and 60 mm long. Experiment data state that the magnetostrictive valve on-time is 0.2 ms, off-time is 0.5 ms, output force is 1000 N, and can get 1500 μm through the mini-amplifier. Experiment and computer simulation show that variable structure control method has more advantage than the PID control method for the solenoid. Compared with conventional solenoid, the magnetostrictive solenoid has more rapid dynamic response and can provide higher blocking forces. It may have prospective application in high-speed and large-flux hydraulic system.