Development of a magnetic actuator for an artificial heart

这项研究从1996年到1998年（财政年度）进行，并获得了以下结果：环形磁铁已被制造出来。采用Nd-Fe-B材料。对执行机构的结构进行了设计和制造。建立了一个循环系统模型。建立了由力矩计、编码器、线性电位器、电子电路和个人计算机组成的致动器和泵的测量系统。执行器和泵的评估已经完成。执行器效率达90%以上。该泵的效率约为50%。提出了一种改进的作动器驱动方法。对拟议系统的全面评估已经完成。结果表明，系统输出功率达到0.2W，相当于人体心脏的输出功率。

This research has been carried out from 1996 to 1998 (fiscal years) and following results have been obtained.1. Ring-shaped magnets have been manufactured. Nd-Fe-B material was used.2. The structure of the actuator has been designed and manufactured.3. A circulatory system model has been made. Measurement system for the actuator and the pump has been established with a torque meter, an encoder, a linear potentiometer, electronic circuits and a personal computer.4. Evaluations of the actuator and the pump have been completed. The efficiency of the actuator is more than 90%. The efficiency of the pump is about 50%.5. An improved driving method of the actuator has been worked out.6. Total evaluation of the proposed system has been completed. It is found that the system output power reaches 0.2W which corresponds to the output of the human heart.