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IPC Subgroup
H02P 21/08

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

Introduced: January 2006

Last revised: January 2016

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

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

1 direct subcode

Child Classifications

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  • H02P 21/09 Field phase angle calculation based on rotor voltage equation by adding slip frequency and speed proportional frequency

Top Applicants

Top 10 applicants by patent filingsfor 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