Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
H02K 23/02

characterised by arrangement for exciting

Introduced: September 1968

Last revised: January 2006

Full Title

DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors > characterised by arrangement for exciting

Classification Context

Section:
ELECTRICITY
Class:
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
Subclass:
DYNAMO-ELECTRIC MACHINES

11 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • H02K 23/04 having permanent magnet excitation
  • H02K 23/06 having shunt connection of excitation windings
  • H02K 23/08 having series connection of excitation windings
  • H02K 23/1 having compound connection of excitation windings
  • H02K 23/12 having excitation produced by current sources independent of the armature circuit
  • H02K 23/14 having high-speed excitation or de-excitation, e.g. by neutralising the remanent excitation field
  • H02K 23/16 having angularly adjustable excitation field, e.g. by pole reversing or pole switching
  • H02K 23/18 having displaceable main or auxiliary brushes
  • H02K 23/2 having additional brushes spaced intermediately of the main brushes on the commutator, e.g. cross-field machines, metadynes, amplidynes or other armature-reaction excited machines
  • H02K 23/22 having compensating or damping windings
  • H02K 23/24 having commutating-pole windings

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