Asynchronous induction motors

Introduced: September 1968

Last revised: January 2006

Full Title

Asynchronous induction motors; Asynchronous induction generators > Asynchronous induction motors

Classification Context

Section:: ELECTRICITY
Class:: GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
Subclass:: DYNAMO-ELECTRIC MACHINES

Filing statistics

IPC H02K 17/02 belongs to the parent subclass H02K, which recorded 426,168 patent applications worldwide between 2013 and 2023. Annual filings grew from 23,896 in 2013 to 46,626 in 2023 (+95%), peaking at 54,100 applications in 2020. 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

9 direct subcodes

Child Classifications

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H02K 17/04 for single phase current
H02K 17/12 for multi-phase current
H02K 17/16 having rotors with internally short-circuited windings, e.g. cage rotors
H02K 17/22 having rotors with windings connected to slip-rings
H02K 17/26 having rotors or stators designed to permit synchronous operation
H02K 17/28 having compensating winding for improving phase angle
H02K 17/3 Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
H02K 17/32 Structural association of asynchronous induction motors with auxiliary mechanical devices, e.g. with clutches or brakes
H02K 17/34 Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter

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