H02M 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.
Filing statistics
IPC subclass H02M recorded 261,349 patent applications worldwide between 2013 and 2023. Annual filings grew from 17,789 in 2013 to 29,685 in 2023 (+67%). The most active applicants in class H02 are SGCC(STATE GRID CORPORATION OF CHINA) (54,496 applications), MITSUBISHI ELECTRIC CORPORATION (10,495 applications) and TOYOTA MOTOR CORPORATION (9,464 applications).
Source: EPO PATSTAT, worldwide filings
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
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