Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H02P 21/08

Indirect field-oriented control; Rotor flux feed-forward control

Introduced: January 2006

Full Title

Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation > Rotor flux based control involving the use of rotor position or rotor speed sensors > Indirect field-oriented control; Rotor flux feed-forward control

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

IPC defines codes here since 2016.

Child Classifications

Navigate with arrow keys, Enter to open

  • H02P 21/09 Field phase angle calculation based on rotor voltage equation by adding slip frequency and speed proportional frequency since 2016 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class H02,2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 54,496
  2. MITSUBISHI ELECTRIC CORPORATION JP 10,495
  3. TOYOTA MOTOR CORPORATION 9,464
  4. GUANGDONG POWER GRID CORPORATION 9,339
  5. ROBERT BOSCH DE 8,226
  6. SIEMENS DE 8,218
  7. DENSO CORPORATION 7,063
  8. MITSUBISHI ELECTRIC CORPORATION 6,619
  9. SAMSUNG ELECTRONICS COMPANY KR 5,826
  10. GREE ELECTRIC APPLIANCES 5,094

Top Applicants (CPC)

Class H02,2013–2023, worldwide · Source: EPO PATSTAT

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