A converter
AssigneeAuckland Uniservices Limited
InventorsDuleepa Jayanath THRIMAWITHANA, Wenwei WANG
Life of this patent
Estimating the term…
Abstract
A wireless power transfer system and a method of operating a multilevel converter for wireless power transfer are disclosed. The wireless power transfer system comprises a multilevel converter with stack inductors that both suppress circulating currents and replace the series inductor of a tuned LCL circuit. A zero voltage switching routine for wireless power transfer is also disclosed.
Claims21
A method comprising switching a multilevel converter to produce a repeating AC waveform across a compensation network of a resonant inductive power transfer primary, wherein the multilevel converter comprises a plurality of submodules each having at least two switches, and the method comprises complementarily switching the at least two switches of each of the plurality of submodules to substantially coincide with zero crossings in the repeating AC waveform.
The method of claim 3, wherein the method comprises alternating submodules from a first limb of the converter with submodules from a second limb of the converter to produce a symmetric bipolar square voltage waveform across the compensation network.
A method comprising driving a resonant inductive power transfer primary at discrete power levels by operating a multilevel converter at a resonant frequency of the resonant inductive power transfer primary, wherein the multilevel converter comprises a plurality of submodules and each of the plurality of submodules has at least two switches, and the method comprises switching the submodules of the converter with a duty cycle selected from the group of duty cycles consisting of:
- 0%, 50% and 100%.
A method comprising switching a multilevel inverter to cause inductive power transfer from a resonant inductive power transfer primary, wherein the multilevel inverter comprises a plurality of submodules, and the method comprises switching each of the plurality of submodules, with zero voltage turn-on, to selectively insert each of the plurality of submodules into a circuit with a compensation network of the resonant inductive power transfer primary.
-40. (canceled)
Dependencies are inferred from the claim text.