SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

Description

G05F encompasses control systems that regulate electrical or magnetic variables to maintain them at desired values or within specified ranges. These systems include voltage regulators, current regulators, magnetic field controllers, and frequency stabilizers used in power supplies, electrical machinery, and electromagnetic devices. The subclass covers both analog and digital regulation methods, feedback control mechanisms, and various sensing and actuation technologies employed to achieve stable operation of electrical and magnetic parameters. Applications range from simple linear voltage regulators to complex switching power supplies and electromagnetic field management systems.

Filing statistics

IPC subclass G05F recorded 38,687 patent applications worldwide between 2013 and 2023. Annual filings declined from 3,937 in 2013 to 3,173 in 2023 (-19%). The most active applicants in class G05 are SIEMENS (4,725 applications), SGCC(STATE GRID CORPORATION OF CHINA) (4,571 applications) and FANUC (4,233 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Regulation of current or voltage specially adapted for use in electronic time-pieces Regulating power supply of digital computers Circuit arrangements for obtaining desired operating characteristics of electromagnets with armatures Regulating electric power distribution networks Regulating the charging of batteries Regulation of the output of static converters, e.g. switching regulators Regulation of the output of electric generators , Controlling transformers, reactors or choke coils Regulating frequency response, gain, maximum output, amplitude or bandwidth of amplifiers Regulating tuning of resonant circuits Controlling generators of electronic oscillations or pulses Regulating characteristics of transmission lines Controlling electric light sources , , , , Electric control of X-ray apparatus