Wide-range power-regulation method for wireless power receiving units by using hybrid multi-level topologies

Abstract

A power-regulated Power Receiving Unit (PRU) of an RWPT system, comprising an ML post-regulation stage via which a load is connected to the PRU; a controller circuit, being adapted to: determine target/predicted values for voltage and current of the a Power Transmit Unit (PTU) of the RWPT system; determine the wireless medium characteristics and resonant frequency of the RWPT system; generate an overall system model by using First Harmonic Approximation (FHA); determine a desired output power; calculate the voltage VS1 of the first harmonic; use VS1 to calculate the equivalent reflected impedance Zo of the load; and calculate the duty-cycle d using the predicted values of the efficiency n the conversion ratio M(D) and the calculated equivalent reflected impedance Zo.

Dependencies are inferred from the claim text.