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IPC Main Group
H02P 8/00

Arrangements for controlling dynamo-electric motors rotating step by step

Introduced: July 1974

Last revised: January 2006

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

Related Keywords

control of dynamo-electric motors rotating STEP-BY-STEP

11 direct subcodes

Child Classifications

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  • H02P 8/02 specially adapted for single-phase or bi-pole stepper motors, e.g. watch-motors, clock-motors
  • H02P 8/12 Control or stabilisation of current
  • H02P 8/22 Control of step size; Intermediate stepping, e.g. microstepping
  • H02P 8/32 Reducing overshoot or oscillation, e.g. damping
  • H02P 8/34 Monitoring operation
  • H02P 8/4 Special adaptations for controlling two or more stepping motors
  • H02P 8/42 characterised by non-stepper motors being operated step by step

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