Patent ID: 11936196
Assignee: INDUCTEV, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A magnetic inductive resonance charging circuit, comprising:
a resonant network comprising an inductive secondary coil that converts a magnetic field received from an inductive primary coil into an alternating current (AC) signal and first and second balanced capacitors connected in series to respective ends of the secondary coil whereby the AC signal series resonates with the first and second capacitors;
a synchronous rectifier that rectifies the AC signal to generate a direct current (DC) signal for application to a load to be charged, the synchronous rectifier comprising a pair of normally open switches and a pair of normally closed switches, one of the pair of normally open switches and one of the pair of normally closed switches being connected to the first balanced capacitor and another of the pair of normally open switches and another of the pair of normally closed switches being connected to the second balanced capacitor, wherein the normally closed switches are arranged to shunt the secondary coil in the event of a fault or loss of rectification control;
a rectifier controller that monitors at least one of voltage or current in the resonant network to detect the fault or loss of rectification control and that disconnects the resonant network from the load to be charged upon detection of the fault or loss of rectification control; and
a charging processor that, when a fault or loss of rectification control condition is detected by the rectifier controller, disables the rectifier controller, which holds the pair of normally open switches off and the pair of normally closed switches on,
wherein the normally closed switches shunt current flow out of the resonant network when the fault or loss of rectification control is detected during active rectification, and
wherein the normally open switches disconnect the resonant network from the load when no power is applied to the synchronous rectifier.