Wireless Power Relay with Constant Power Controlled Converter

A power converter comprising:

• a power stage comprising at least one inductor and at least one switching device;
• a current controller configured to control the at least one switching device;
• an current measurement circuit configured to measure at least one of an input current or output current of the power stage and provide a signal corresponding to the measured current to the current controller;
• and
• an outer voltage loop configured to measure at least one of an input voltage or an output voltage of the power stage and provide an error signal corresponding to a difference between the measured voltage and a reference signal to the current controller.

A wireless power relay system comprising:

• a wireless power relay device comprising a first wireless power receiver configured to receive power wirelessly from a first wireless power transmitter and a second wireless power transmitter configured to deliver power wirelessly to a second wireless power receiver;
• and
• the second wireless power receiver;
• wherein:
• the first wireless power receiver is configured to communicate with the first wireless power transmitter via a first communication channel employing modulation of the received power from the first wireless power transmitter, and the second wireless power receiver is configured to communicate with the second wireless power transmitter via a second communication channel employing modulation of the received power from the second wireless power transmitter;
• and
• the wireless power relay device further comprises means for isolating the first communication channel from the second communication channel.

A wireless power relay device comprising:

• a first wireless power receiver configured to receive power from a first wireless power transmitter in another device, wherein the first wireless power receiver is configured to communicate with the first wireless transmitter via a first communication link employing modulation of the received power;
• a second wireless power transmitter configured to deliver power from the wireless power relay device to a second wireless power receiver in another device, wherein the second wireless power transmitter is configured to receive communication from the second wireless power receiver via a second communication link employing modulation of the transmitted power;
• a power converter having an input coupled to the first wireless power receiver and an output coupled to the second wireless power transmitter;
• and
• a jamming circuit configured to introduce a jamming signal into the first communication link.