Input power appraisal based wireless power system

摘要

A wireless power system (WPS) has a wireless power transmitter (WPT) that appraises an input power available to a power inverter from one or more input power sources. The WPT comprises the power inverter that wirelessly transmits power to a wireless power receiver (WPR) of the WPS, and a power appraiser circuit (PAC). The PAC ascertains maximum input power available to the power inverter from the input power sources. The PAC includes a variable load connected to a path carrying the input power to the power inverter or one or more input pins that receive power ratings of the input power sources that indicate available maximum input power from the input power sources. The ascertaining of maximum input power available to the power inverter from the input power sources appraises the input power available to the power inverter. The WPR receives information representing maximum power deliverable by the WPT.

主权项

1. A wireless power transmitter comprising: a power inverter configured to wirelessly transmit power to a wireless power receiver, and a power appraiser circuit configured to ascertain maximum input power available to said power inverter from one or more of a plurality of said input power sources, said wireless power transmitter configured to select the input power source that best satisfies a power requirement of said wireless power receiver; wherein, by ascertaining said maximum input power available from said one or more of said plurality of input power sources and selecting the input power source that best satisfies said power requirement of said wireless power receiver, said wireless power transmitter is able to transmit power to said wireless power receiver in a stable manner.