Patent ID: 9354620
Filing Date: 2016-05-31
CPC Classification: A61N,G05B,H02J,H04B

Claim Text:
1. A method of triggering power transmission in an inductively coupled power transmission system comprising: a. waiting a time duration; b. electrically exciting a primary coil in a power transmitter; c. receiving a signal indicative of resonance properties of said primary coil; d. determining if a secondary coil in a power receiver is inductively coupled to said primary coil by: determining a change in effective inductance of said primary coil; determining a change in effective resistance of said primary coil; and determining a match between: values indicative of effective inductance of said primary coil, and values indicative of effective resistance of said primary coil; and at least one set of values associated with a primary coil inductively coupled to a secondary coil; and e. triggering power transmission from said primary coil to said secondary coil if said secondary coil is inductively coupled to said primary coil, or repeating steps a-d if said secondary coil is not inductively coupled to said primary coil.