Implant location detection and adaptive temperature control

A device comprising:

• a user interface;
• a power transmitting unit configured to wirelessly transfer electromagnetic energy to a power receiving unit;
• and
• processing circuitry configured to:
• calculate a coupling position, wherein the coupling position comprises a relative position between the power transmitting unit and the power receiving unit;
• cause the user interface to output an indication of an alignment of the power transmitting unit and the power receiving unit based on the calculated relative position.

A method comprising:

• computing, by processing circuitry, a target output power deliverable by a wireless power transmitting unit for a first duration;
• controlling, by the processing circuitry, circuitry to output the target output power based in part on a heat limit;
• receiving an indication of a first temperature from a first temperature sensor at a first location on the power receiving unit;
• receiving an indication of a second temperature from a second temperature sensor at a second location on the power receiving unit;
• comparing the first temperature to the second temperature;
• updating an adjustment factor based on the first temperature and the second temperature;
• and
• applying the adjustment factor to the heat limit for a subsequent duration.