Abstract
Survival times of experimental animals with pneumatically driven artificial hearts and assist devices increased significantly. But any of these pumps are not totally implantable due to the bulky energy source and energy conversion system. An electrically powered and mechanically driven pump is the only choice for the long term application.
we chose the polarized electromagnetic energy conversion system with a rear earth magnet as a driving mechanism of the artificial heart.
The blood pump is a pusher plate type. a pusher plate is connected with the armature by a link to magnify the stroke of the armature.
To obtain the high efficiency, the dynamic responce of the armature, springs, links and so on are analyzed.
Specification of this pump is as follows; stroke volume=20mL, heart rate=0 to 150bpm, mean aortic pressure=100mmHg.
In the estimation of the computer simulation, the efficiency of this pump driving system is more than 35%. The bench test model of the driving mechanism to confirm the concept design of this pump have been assembled.
