Loss analysis and efficiency improvement of the power supply system using magnetic coupling for medical implants

Noninvasive electric power supply for medical implants, such as artificial hearts and cardiac pacemakers, should be indispensable, as the function of these devices becomes more sophisticated and the power consumption is increasing. The paper proposed a novel power supply system for a deep position, using magnetic coupling. The system does not have a danger of the wire break or corrode. Several losses of the system were analyzed, in order to improve the system. In addition, exchanging the rectifier, the rotation speed can be kept slower and the mechanical loss is decreased when the batteries are charged.