| IPC 7 English version |
 H02K 9/00 - H02K 19/38 |
| H02K02100-H02K03104 |
H02K 33/00 - H02K 57/00  |
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| SECTION H – ELECTRICITY |
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| H 02 | GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER |
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| H 02 K | DYNAMO-ELECTRIC MACHINES (measuring instruments G01; dynamo-electric relays H01H 53/00; conversion of dc or ac input power into surge output power H02M 9/00; loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers H04R) |
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21/ | 00 | Synchronous motors having permanent magnet; Synchronous generators having permanent magnet (stator cores with permanent magnets H02K 1/17; rotor cores with permanent magnets H02K 1/27) |
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21/ | 02 | . | Details |
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21/ | 04 | . | . | Windings on magnet for additional excitation |
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21/ | 10 | . | . | Rotating armatures |
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21/ | 12 | . | with stationary armature and rotating magnet |
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21/ | 14 | . | . | magnet rotating within armature |
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21/ | 16 | . | . | . | having an annular armature core with salient poles (with homopolar co-operation H02K 21/20) |
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21/ | 18 | . | . | . | having horse-shoe armature core (with homopolar co-operation H02K 21/20) |
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21/ | 20 | . | . | . | having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar machine |
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21/ | 22 | . | . | magnet rotating around armature, e.g. flywheel magneto |
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21/ | 24 | . | . | magnet axially facing armature, e.g. hub-type cycle dynamo |
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21/ | 26 | . | with rotating armature and stationary magnet |
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21/ | 28 | . | . | armature rotating within magnet |
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21/ | 30 | . | . | . | having an annular armature core with salient poles (with homopolar co-operation H02K 21/36) |
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21/ | 32 | . | . | . | having a horse-shoe magnet (with homopolar co-operation H02K 21/36) |
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21/ | 34 | . | . | . | having bell-shaped or bar-shaped magnet, e.g. for cycle lighting (with homopolar co-operation H02K 21/36) |
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21/ | 36 | . | . | . | with homopolar co-operation |
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21/ | 38 | . | with rotating flux distributor, and armature and magnet both stationary |
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21/ | 40 | . | . | flux distributor rotating around magnet and within armature |
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21/ | 42 | . | . | flux distributor rotating around armature and within magnet |
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21/ | 44 | . | . | armature windings wound upon magnet |
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21/ | 46 | . | Motors having additional short-circuited winding for starting as an asynchronous motor |
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21/ | 48 | . | Generators with two or more outputs |
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23/ | 00 | Dc commutator motors or generators having mechanical commutator; Universal ac/dc commutator motors |
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23/ | 02 | . | characterised by the exciting arrangement |
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23/ | 04 | . | . | having permanent magnet excitation |
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23/ | 06 | . | . | having shunt connection of excitation windings |
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23/ | 08 | . | . | having series connection of excitation windings |
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23/ | 10 | . | . | having compound connection of excitation windings |
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23/ | 12 | . | . | having excitation produced by a current source independent of the armature circuit |
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23/ | 14 | . | . | having high-speed excitation or de-excitation, e.g. by neutralising the remanent excitation field |
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23/ | 16 | . | . | having angularly adjustable excitation field, e.g. by pole reversing, by pole switching |
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23/ | 18 | . | . | having displaceable main or auxiliary brushes |
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23/ | 20 | . | . | having additional brushes spaced intermediately of the main brushes on the commutator, e.g. cross-field machine, metadyne, amplidyne, other armature-reaction excited machine |
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23/ | 22 | . | . | having compensating or damping winding |
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23/ | 24 | . | . | having commutating-pole winding |
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23/ | 26 | . | characterised by the armature winding |
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23/ | 28 | . | . | having open winding, i.e. not closed within armature |
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23/ | 30 | . | . | having lap winding; having loop winding |
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23/ | 32 | . | . | having wave winding; having undulating winding |
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23/ | 34 | . | . | having mixed windings |
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23/ | 36 | . | . | having more than one winding; having more than one commutator; having more than one stator |
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23/ | 38 | . | . | having winding or connection for improving commutation, e.g. equipotential connection |
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23/ | 40 | . | characterised by the arrangement of the magnet circuit |
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23/ | 42 | . | . | having split poles, i.e. zones for varying reluctance by gaps in poles or by poles with different spacing of the air gap |
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23/ | 44 | . | . | having movable or turnable iron parts |
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23/ | 46 | . | . | having stationary shunts, i.e. magnetic cross flux |
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23/ | 48 | . | . | having adjustable armature |
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23/ | 50 | . | Generators with two or more outputs |
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23/ | 52 | . | Motors acting also as generators, e.g. starting motor used as generator for ignition or lighting |
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23/ | 54 | . | Disc armature motors or generators |
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23/ | 56 | . | Motors or generators having the iron core separated from armature winding |
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23/ | 58 | . | Motors or generators having no iron core |
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23/ | 60 | . | Motors or generators having a rotating armature and a rotating excitation field |
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23/ | 62 | . | Motors or generators with stationary armature and rotating excitation field |
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23/ | 64 | . | Motors specially adapted for running on dc or ac by choice |
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23/ | 66 | . | Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedance, with switch (control arrangements external to the machine H02P) |
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23/ | 68 | . | Structural association with auxiliary mechanical devices, e.g. with clutch, with brake (control arrangements external to the machine H02P) |
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24/ | 00 | Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn |
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25/ | 00 | Dc interrupter motors or generators |
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26/ | 00 | Machines adapted to function as torque motors, i.e. to exert a torque when stalled |
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27/ | 00 | Ac commutator motors or generators having mechanical commutator (universal ac/dc motors H02K 23/64) |
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27/ | 02 | . | characterised by the armature winding |
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27/ | 04 | . | having single-phase operation in series or shunt connection |
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27/ | 06 | . | . | with a single or multiple short-circuited commutator, e.g. repulsion motor |
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27/ | 08 | . | . | with multiple-fed armature |
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27/ | 10 | . | . | with switching devices for different modes of operation, e.g. repulsion-induction motor |
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27/ | 12 | . | having multi-phase operation |
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27/ | 14 | . | . | in series connection |
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27/ | 16 | . | . | in shunt connection with stator feeding |
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27/ | 18 | . | . | in shunt connection with rotor feeding |
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27/ | 20 | . | Structural association with a speed regulating device |
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27/ | 22 | . | having means for improving commutation, e.g. auxiliary fields, double windings, double brushes |
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27/ | 24 | . | having two or more commutators |
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27/ | 26 | . | having disc armature |
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27/ | 28 | . | Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine (control arrangements external to the machine H02P) |
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27/ | 30 | . | Structural association with auxiliary mechanical devices, e.g. clutch, brake (control arrangements external to the machine H02P) |
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29/ | 00 | Motors or generators having non-mechanical commutating devices, e.g. discharge tubes, semiconductor devices |
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29/ | 03 | . | with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems [6] |
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29/ | 06 | . | with position sensing devices (H02K 29/03 takes precedence) [4,6] |
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29/ | 08 | . | . | using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K 29/12 takes precedence) [4] |
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29/ | 10 | . | . | using light effect devices [4] |
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29/ | 12 | . | . | using detecting coils [4] |
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29/ | 14 | . | with speed sensing devices (H02K 29/03 takes precedence) [4,6] |
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31/ | 00 | Acyclic motors or generators, i.e. dc machines having a drum or disc armature with continuous current collectors |
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31/ | 02 | . | with solid-contact collectors |
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31/ | 04 | . | with at least one liquid-contact collector |
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| H02K 9/00 - H02K 19/38 |  | H02K 33/00 - H02K 57/00 |
