H02P 21/00 Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
Introduced: January 1995
Last revised: January 2016
Classification Context
- Section:
- ELECTRICITY
- Class:
- GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
- Subclass:
- CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
Filing statistics
IPC H02P 21/00 belongs to the parent subclass H02P, which recorded 122,940 patent applications worldwide between 2013 and 2023. Annual filings grew from 9,364 in 2013 to 11,656 in 2023 (+24%), peaking at 12,542 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
Additional Content
Vector control Vector control is a method of controlling the speed of a three phase AC motor by varying its power supply in accordance with a mathematical model of the machine flux. Stator currents are measured and transformed into a complex current space vector, allowing control of flux and torque. The vector components are then transformed to a rotating coordinate system and voltages calculated in this system are generated by an inverter and applied to the motor.
Related Keywords
11 direct subcodes
Child Classifications
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- H02P 21/02 specially adapted for optimising the efficiency at low load
- H02P 21/04 specially adapted for very low speeds
- H02P 21/05 specially adapted for damping motor oscillations, e.g. for reducing hunting
- H02P 21/06 Rotor flux based control involving the use of rotor position or rotor speed sensors
- H02P 21/12 Stator flux based control involving the use of rotor position or rotor speed sensors
- H02P 21/13 Observer control, e.g. using Luenberger observers or Kalman filters
- H02P 21/14 Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P 21/22 Current control, e.g. using a current control loop
- H02P 21/24 Vector control not involving the use of rotor position or rotor speed sensors
- H02P 21/34 Arrangements for starting
- H02P 21/36 Arrangements for braking or slowing; Four quadrant control
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