Power source load control

ChangeBridge: Patent Grants - Power Supply (H02J)

Published March 31st, 2026

Detected March 31st, 2026

Summary

The USPTO granted Patent US12592578B1 to PSLC LLC for a method and apparatus controlling AC power source load through frequency modulation. The system enables loads to determine available power and respond to overload conditions without traditional wired or wireless communications. Invented by J Carl Cooper.

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What changed

USPTO granted Patent US12592578B1 to PSLC LLC covering a method and apparatus for controlling total load on AC power sources such as generators or inverters. The patent describes controlling the frequency of output AC power in response to loading conditions, allowing that frequency to carry loading information through the AC power itself. The frequency can indicate overload conditions, with loads being responsive to reduce themselves. This eliminates the need for traditional communication systems between power sources and controlled loads.

Patent grants do not impose regulatory obligations or compliance requirements on other entities. This is a routine intellectual property notice confirming exclusive rights have been granted to the assignee. No action is required from other parties unless they seek to license the technology or develop similar systems.

Source document (simplified)

← USPTO Patent Grants

Power source load control

Grant US12592578B1 Kind: B1 Mar 31, 2026

Assignee

PSLC LLC

Inventors

J Carl Cooper

Abstract

A method and apparatus for controlling the total load presented to an AC power source such as a generator or inverter used to provide backup or portable power. The frequency of the output AC power is controlled in response to the loading on the power source, thereby providing information about that loading of the power source which is carried by the AC power itself, thus reducing or eliminating the need for traditional wired and wireless communications. By controlling the frequency of AC power, controllable loads and load control devices can determine the amount of remaining power available from the power source in order to determine if a given load can be connected without creating an overload. The frequency may also be controlled at the power source to indicate an overload, with the loads being responsive to that overload frequency to reduce the load and thereby alleviate the overload.