Patent ID: 11923678
Assignee: CISCO TECHNOLOGY, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method performed at a power transmitter that provides power over a current loop to a power receiver, the method comprising:
coupling power to the current loop for transport to the power receiver;
monitoring current level on the current loop;
determining, by a controller of the power transmitter, whether the current level on the current loop passes a safety check within a predetermined time interval since a previous determination that the current level was not within a safe range; and
controlling connectivity of the power to the current loop depending on whether the safety check has or has not passed within the predetermined time interval, wherein controlling connectivity of the power to the current loop comprises controlling connectivity of alternating current (AC) power, wherein the power receiver disconnects from the current loop to stop Dulling power for multiple different periods of time that encompass corresponding multiple different portions within one period of an AC waveform of the AC power to enable the determining, by the controller of the power transmitter, whether the current level on the current loop passes a safety check, and wherein the multiple different portions of the AC waveform include a first portion that encompasses a zero crossing of the AC waveform and a second portion that encompasses a peak of the AC waveform.