Abstract
In the development of total artificial heart (TAH), we must design left and right pumps separately to achieve a proper flow balance. In this study, we designed a motor of pump to maintain right heat circulation and prototyped. The Motor was designed by using Assumptive Magnetic Flux Path Method. We made equivalent circuit by this method, and evaluated synthetic reluctance, magnetic flux of gap for the purpose of inhibiting magnetic saturation. We adopted structure of DC brushless, four poles and 12 slots. We assumed the pump efficiency was 50%.We set maximum amount of cardiac output was 10L/min, maximum pressure was 20mmHg when rotation number was 3000rpm.In measurement, we examined the effect of gap difference, we changed the gap was 1.0 mm and 1.5 mm respectively. Result of measurement, torque and speed constants was 55 mNm/A and 180 rpm/V, 51 mNm/A and 198 rpm/V when the gap difference was 1.0 mm and 1.5 mm respectively. We confirmed the characteristics of the motor tend to high torque when the gap is narrow. On the other hand, it tends to high revolution when the gap is wide.
