Systems, devices, and methods for improving wireless power transmission are disclosed herein. A method of powering an implantable ventricular assist device with an external charging device includes receiving a signal indicative of a change in a property of a deformable coil of the resonant circuit. A performance property of the deformable coil is determined based on the signal. An adjustment to a tuning of the resonant circuit is identified based on the performance property of the deformable coil. The resonant circuit is tuned according to the adjustment to the tuning of the resonant circuit. The resonant circuit is driven to transmit power to a secondary coil electrically coupled with the implantable ventricular assist device to power the ventricular assist device.

The disclosure relates to a device for transcutaneously transmitting energy into a human body. The device may include an extracorporeally arranged transmission device that includes an induction charging coil and a sensor. Upon receiving an electrical current, the induction charging coil may provide a magnetic field to inductively transmit energy to an induction coil arranged intracorporeally, transcutaneously powering a medical device, such as a mechanical circulatory support system within in the body. The sensor may provide a position signal representing a relative position between the induction charging coil and the induction coil. In turn the position signal may be used to position the extracorporeal induction coil so that energy it is concentrically aligned with the intracorporeal induction coil and energy can be efficiently transferred to the medical device.

A transcutaneous energy transfer system (TETS) that includes external and internal coils that have permeable cores is provided. According to one aspect, the TETS includes an external coil having disposed in proximity thereto, a first set of at least one permeable core that is wound by windings of the external coil. The TETS also includes an internal coil having disposed in proximity thereto, for each permeable core disposed in proximity to the external coil, a corresponding permeable core that is wound by windings of the internal coil.

Disclosed is a distributed transformer or extension cord component for a transcutaneous energy transfer system used to transfer electric power to an implanted medical device. The extension cord component may enable power transfer to occur at various points on or near the body of the subject within whom the medical device is implanted. In this way, the subject may gain greater flexibility and high levels of convenience in connection with use of the transcutaneous energy transfer system.

An operable implant adapted to be implanted in the body of a patient, the operable implant comprising an operation device and a body engaging portion, wherein the operation device comprises a first unit comprising a receiving unit for receiving wireless energy and a first gear system adapted to receive mechanical work having a first force and first velocity, and output mechanical work having a different second force and a different second velocity. The operation device further comprises a second unit comprising an electrical motor adapted to transform electrical energy to the mechanical work, and a distance element adapted to separate the first and second units such that the receiving unit, when receiving wireless energy, is not substantially affected by the second unit.

The present disclosure relates to an improved transcutaneous energy transfer (TET) system that generates and wirelessly transmits a sufficient amount of energy to power one or more implanted devices, including a heart pump, while maintaining the system's efficiency, safety, and overall convenience of use. The disclosure further relates one or more methods of operation for the improved system.

In an implanted medical device system, an external power transmitter and methods for adjusting a rate of search pulse transmission by an external power transmitter of an implanted medical device system are disclosed. According to one aspect, a method includes detecting a condition of the external power transmitter, and selecting among rates of transmission of search pulses based on the detected condition.

A method of estimating a depth of an implanted receiving coil of a transcutaneous energy transfer system (TETS) includes aligning the implanted receiving coil with an external transmission coil. A coupling coefficient between the implanted receiving coil and the external transmission coil is estimated based on a first transfer function and operating conditions. The depth of the implanted receiving coil is estimated from the estimated coupling coefficient based on a second transfer function.

An external coil system for a transcutaneous energy transfer system (TETS), the external coil being configured to transfer energy sufficient to power and implantable blood pump. The system includes a housing containing the external coil, the housing includes a thermal insulating base, the external coil being partially disposed within the thermal insulating base and a thermally conductive plastic, the external coil being partially disposed within the thermally conductive plastic.

An external coil system for a transcutaneous energy transfer system (TETS), the external coil being configured to transfer energy sufficient to power and implantable blood pump. The system includes a housing containing the external coil, the housing includes a thermal insulating base, the external coil being partially disposed within the thermal insulating base and a thermally conductive plastic, the external coil being partially disposed within the thermally conductive plastic.