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
Additional Content IPC
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.
Of 14 combined children, 11 exist in both systems.
3 codes are CPC-only extensions.
IPC defines codes here since 2006.
Child Classifications
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- H02P 21/02 specially adapted for optimising the efficiency at low load since 2006 IPC+CPC Available in IPC and CPC
- H02P 21/05 specially adapted for damping motor oscillations, e.g. for reducing hunting since 2006 IPC+CPC Available in IPC and CPC
- H02P 21/06 Rotor flux based control involving the use of rotor position or rotor speed sensors since 2006 IPC+CPC Available in IPC and CPC
- H02P 21/12 Stator flux based control involving the use of rotor position or rotor speed sensors since 2006 IPC+CPC Available in IPC and CPC
- H02P 21/13 Observer control, e.g. using Luenberger observers or Kalman filters since 2006 IPC+CPC Available in IPC and CPC
- H02P 21/14 Estimation or adaptation of machine parameters, e.g. flux, current or voltage since 2006 +2 CPC IPC+CPC Available in IPC and CPC
- H02P 21/22 Current control, e.g. using a current control loop since 2016 IPC+CPC Available in IPC and CPC
- H02P 21/24 Vector control not involving the use of rotor position or rotor speed sensors since 2016 IPC+CPC Available in IPC and CPC
- H02P 21/36 Arrangements for braking or slowing; Four quadrant control since 2016 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
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