Giant Magnetostrictive Material Micro-displacement Actuator Spatial Distribution Of Magnetic Field Characteristics Of The Study

Giant Magnetostrictive Material, GMM in abbreviatory, is one kind of new function materialsand can give giant magnetostriction strains with temperature indoor and low magnetic field. Ithas good features such as giant strains, high force, high energy density, highmechanical-magnetic coupling coefficient, microsecond response and so on. So, GiantMagnetostrictive Actuators equipped with GMM are now being employed in a variety ofapplications such as vibration control, micro-feeding-on control, micro-displacemetntpositioning control with relative simply structures and small body.This paper was mainly concerned with the design and establishment of model of spacemagnetic field of GMM in the Giant Magnetostrictive Actuator (GMA), and solution ofmagnetic field uniformity degree of GMM in the GMA.The establishment of model of GMM is processed as follow: firstly, established the model ofspace magnetic field in the GMM using the theory of scalar magnetic potential; secondly,emulated the magnetic field of GMM and validate the model by ANSYS magnetic analysissoftware; lastly analyzed the magnetic field distribution characteristic of GMM.The solution of magnetic field equality degree of GMM in the GMA is described as follow:firstly, applied a few pair of soft iron to offer the magnet field for the GMM according totheory of winding uniformization; secondly, optimized the parameter by MATLABmathematics emulation software; thirdly, designed the magnetic circuit framework byparameter; lastly, emulate magnetic field uniformity degree of GMM in the new GMA, andvalidate the model by ANSYS magnetic analysis software. From the emulation solution, theGMM magnetic field has perfectly uniformed in the new GMA.In addition, the paper introduce the method to improve the precision of programme controlconstant current source(CCS). the circuit framework is designed and optimization ofparameter is described.This paper established a magnetic field model of GMM in GMA, provided a method toimprove the strong magnetic field uniformity degree, and improve the precision of constantcurrent source. It will highly benefit for the design of GMA and control precision of GMA.