Title :
Design of an BLDC drive with iron core to improve the efficiency of Ventricular Assist Devices
Author :
Pohlmann, A. ; Hameyer, Kay
Author_Institution :
Inst. of Electr. Machines, RWTH Aachen Univ., Aachen, Germany
Abstract :
Single sided Brushless DC (BLDC) drives with axial flux have the advantage of a flat design and high torque. This makes them a good choice for operating less invasive implantable Ventricular Assist Devices (VADs), which can be applied for the therapy of cardio vascular diseases. The disadvantage of such drives is the occurrence of high axial forces. In order to avoid axial forces some VAD drives have air gap windings. Their torque generation completely relies on magnetic stray fluxes. Therefore an increase in efficiency is expected when using iron teeth with single tooth windings. As iron losses have to be considered now, a study is performed to identify the key parameters for iron and copper losses. From this study an efficient VAD drive design is deduced.
Keywords :
DC motor drives; air gaps; artificial organs; brushless DC motors; magnetic cores; magnetic flux; BLDC drives; VAD; air gap windings; axial flux; axial forces; cardio vascular diseases therapy; copper losses; iron core; iron losses; iron teeth; magnetic stray fluxes; single sided brushless DC drives; ventricular assist devices; Copper; Iron; Soft magnetic materials; Stator windings; Torque; Windings;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2013 International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4799-1446-3
DOI :
10.1109/ICEMS.2013.6713142