An Effective Sandwiched Wireless Power Transfer System for Charging Implantable Cardiac Pacemaker

This paper presents a new effective sandwiched wireless power transfer (WPT) system, which is adopted to recharge the battery of a micro medical robotics for a cardiac pacemaker. The key of the design is to use the distinct sandwiched topology in both the transmitter and receiver coils, whose operating frequency of 160 kHz is significantly lower than the reported WPT system up to megahertz. Furthermore, the implantable receiver adopts the bilateral coil design, which can harness more power within a limited size. Meanwhile, with the sandwiched transmitting coils, the proposed design achieves the high feasibility and flexibility of the controllable distance for different kinds of micro medical robotics in patients. As a result, the proposed system can provide the power as high as 5 W and the transmission efficiency up to 88%. Finally, the corresponding theoretical analysis, simulation, and experimentation are carried out to prove the validity of the proposed sandwiched medical WPT system for the implantable device in the patient body.

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