Designing and Modelling A Ventricular Assistive Device

An Increase In The Number Of Cardiac Patients And A Decrease In Number Of HeartDonors Has triggered The Development Of ArtificialHeartPump To Support The ProperFunctioning Of The Heart.This paperPresents Design Of MagneticallyLevitated (Maglev) Axial Magnetic Flux Brushless Direct CurrentMotor (Af-Bldc) For Axial Blood Flow VentricularAssistDevice (Vad).A ventricularassistdevice (VAD) is an electromechanicaldevice for assistingcardiac circulation, whichisusedeither to partially or to completely replace the function of afailingheart. The developeddevice has three phase Two axial flow Bldcmotors are placedsymmetrically and the rotors are coupled to the pump. The stator and rotor of the Bldcconsist a hole, sincemagnetic flux pathdoesn’tpassthrough the central part. In order to get large volume in pumpchamber and lower speed, the pumpimpellersmaybeplaced in thishole. Motor has passive magneticbearing, whichdoesn’tinvolve contact and friction, thusitminimize the blood damage. For minimizing the penetration of magneticfieldto blood, the axial magnetic fluxes are parallel to the direction of blood.