due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step

Full Title

Arrangements for controlling electric generators for the purpose of obtaining a desired output > by variation of field (H02P9/08, H02P9/10 take precedence) > due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step

1 direct subcode

Child Classifications

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H02P 9/18 the switching being caused by a servomotor, measuring instrument, or relay

Top Applicants

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

SGCC(STATE GRID CORPORATION OF CHINA) 24,515
MITSUBISHI ELECTRIC CORPORATION JP 11,346
SIEMENS DE 9,026
ROBERT BOSCH DE 9,005
SAMSUNG ELECTRONICS COMPANY KR 6,729
GUANGDONG POWER GRID CORPORATION 5,740
DENSO CORPORATION JP 5,077
LG ELECTRONICS KR 5,041
LG INNOTEK COMPANY KR 4,442
TOYOTA MOTOR CORPORATION 4,349