Patent ID: 9725003
Date: 2017-08-08
CPC Classifications: B60L,H02J,Y02T

Claim:
1. An electrical charging system configured to wirelessly charge an energy storage device, said system comprising: an electrical power transmitter including a variable frequency oscillator configured to source electrical power having an alternating current, an alternating voltage, and a frequency; a controller operable to adjust the variable frequency oscillator, thereby changing the frequency of the sourced electrical power; an off-transducer in electrical communication with the electrical power transmitter, configured to be electromagnetically coupled to an on-vehicle transducer that is in electrical communication with said energy storage device, thereby inducing the on-vehicle transducer to capture electrical power to charge the energy storage device; and a phase detection circuit in communication with the controller and the off-transducer and configured to determine a phase difference between the alternating voltage and the alternating current, wherein the controller is configured to adjust the variable frequency oscillator based on the phase difference such that the frequency of the sourced electrical power maintains the phase difference within a desired range; and a wireless transmitter in electrical communication with the controller, wherein said on-vehicle transducer is in electrical communication with a power detection circuit configured to determine a value of the captured electrical power, wherein the power detection circuit is in electrical communication with a wireless receiver configured to wirelessly transmit the value of the captured electrical power to the controller via the wireless transmitter, and wherein the controller is configured to determine a power efficiency by comparing the value of the captured electrical power to the value of the sourced electrical power.