APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF

Introduced: September 1968

Last revised: January 1990

Classification Context

Section:: ELECTRICITY
Class:: GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
Subclass:: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF

Description

H02M encompasses apparatus and methods for converting electrical power between different forms: AC-to-AC, AC-to-DC, and DC-to-DC conversions, as well as generating surge or pulse output from steady input power. This subclass covers rectifiers, inverters, frequency converters, voltage regulators, power supplies, and associated control and regulation circuits designed for use with utility mains, battery systems, or similar primary power sources. The classification includes both the converter hardware (transformers, semiconductor switching devices, reactive components) and control systems that manage conversion efficiency, output stability, and protection against electrical faults. Related switching power supplies, uninterruptible power supplies (UPS), and stabilized voltage/frequency supplies fall within this scope.

Additional Content

Glossary

conversion conversions In respect of an electric variable, e.g. voltage or current, conversion means the change of one or more of the parameters of the variable, e.g. amplitude, frequency, phase or polarity.

Limiting references

Transformers Dynamo-electric converters Controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters

Application references

Conversion of current or voltage specially adapted for use in electronic time-pieces with no moving parts for digital computers

Related Keywords

CIRCUITS for converting power suppliesCIRCUITS for rectifying power supplieselectric CONVERTERS for AC/DC, DC/AC or DC/DC circuitselectric CONVERTERS for frequency or phase-changing circuitsvibratory electric CONVERTERScircuits for IGNITING of static convertersgenerating electric OSCILLATIONS in power inverterscircuits for conversion of electric POWERcircuits for RECTIFYING electric currentscircuits for TRANSFORMING electric currents

6 direct subcodes

Child Classifications

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H02M 1/00 Details of apparatus for conversion
H02M 11/00 Power conversion systems not covered by the other groups of this subclass
H02M 3/00 Conversion of DC power input into DC power output
H02M 5/00 Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
H02M 7/00 Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
H02M 9/00 Conversion of DC or AC input power into surge output power

Top Applicants

Top 10 applicants by patent filingsfor class H02, 2013–2023, worldwide · Source: EPO PATSTAT

SGCC(STATE GRID CORPORATION OF CHINA) 54,496
MITSUBISHI ELECTRIC CORPORATION JP 10,495
TOYOTA MOTOR CORPORATION 9,464
GUANGDONG POWER GRID CORPORATION 9,339
ROBERT BOSCH DE 8,226
SIEMENS DE 8,218
DENSO CORPORATION 7,063
MITSUBISHI ELECTRIC CORPORATION 6,619
SAMSUNG ELECTRONICS COMPANY KR 5,826
GREE ELECTRIC APPLIANCES 5,094