Systems and methods for inductively coupled power transfer and bidirectional communication
US10256676B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2016 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | Apr 4, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of wireless power transfer includes providing a primary rail voltage to a primary coil via a primary transistor network, driving the primary transistor network with a primary PWM signal, inducing a secondary current on a secondary coil, providing a secondary rail voltage to a load via a secondary transistor network, generating a voltage signal from the secondary current via a current sense amplifier, phase-locking the voltage signal to the secondary current, adjusting a phase shift and amplitude of the voltage signal based on the impedance of the load, thereby generating a driving voltage, converting the driving voltage to a secondary PWM signal, and driving the secondary transistor network with the PWM signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.