Robust Maximum Efficiency Tracking Control of Wirelessly Powered Directly Supplied Heart Pumps

In recent times, wireless power transfer systems have been identified as a reliable option to supply medical implants. Up now, Wireless Power Transfer Systems (WPTS) only used charge batteries of low-power However, for implants requiring relatively higher power, such ventricular assist device, which is an implanted blood pump in the patient’s abdominal cavity, external has used. When WPTS implants, it increases number required converter stages and hardware complexity along with volume, tends reduce overall efficiency. addition, existence uncertainties WPTS-based load mutual inductance variations, can lead system instability or poor performance. The focus this paper design motor directly through its inverter based on requirements drive (MDS) without resorting additional DC-to-DC stage. To end, constraints that imposes upon identified. make closed-loop operation, µ-synthesis robust controller designed sure maintains stability performance respect system’s existing uncertainties. A experimental results are provided verify effectiveness adopted approach corresponding WPTS. Furthermore, findings maximum efficiency tracking (MET) (to minimize coil losses) constant DC link voltage control shown compared. According analysis, former appears perform better. dynamic other hand, demonstrates latter’s advantage.