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IPC 7
  H02K - H02K 7/20  
H02K00900-H02K01938
  H02K 21/00 - H02K 31/04  

SECTION H – ELECTRICITY


H 02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER


H 02 KDYNAMO-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)


9/

00Systems for cooling or ventilating (channels or ducts in parts of the magnetic circuit H02K 1/20, H02K 1/32; channels or ducts in or between conductors H02K 3/22, H02K 3/24)

9/

02.by ambient air flowing through the machine

9/

04..having means for generating flow of cooling medium, e.g. having fan

9/

06...with fan or impeller driven by the machine shaft

9/

08.by gaseous cooling medium circulating wholly within the machine casing (H02K 9/10 takes precedence)

9/

10.by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing

9/

12..wherein the cooling medium circulates freely within the casing

9/

14.wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle

9/

16..wherein the cooling medium circulates through ducts or tubes within the casing

9/

18..wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing

9/

19.for machines with closed casing and with closed-circuit cooling using a liquid cooling medium, e.g. oil

9/

193..with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium

9/

197..in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator

9/

20..wherein the cooling medium vaporises within the machine casing

9/

22.by solid heat conducting material embedded in, or arranged in contact with, stator or rotor, e.g. heat bridge

9/

24.Protection against failure of cooling arrangements, e.g. due to loss of cooling medium, due to interruption of the circulation of cooling medium (circuit arrangements affording such protection H02H 7/00)

9/

26.Structural association with machine of devices for cleaning or drying cooling medium, e.g. of filter

9/

28.Cooling of commutators, slip-rings, or brushes, e.g. by ventilating (current collectors in general H01R 39/00)


11/

00Structural association with measuring or protective devices or electric components, e.g. with resistor, with switch, with suppressor for radio interference

11/

02.for suppression of radio interference  [6]

11/

04.for rectification  [6]


13/

00Structural associations of current collectors with motors or generators, e.g. brush mounting plates, connections to windings (supporting or protecting brushes or brush holders in motor casings or enclosures H02K 5/14); Disposition of current collectors in motors or generators; Arrangements for improving commutation

13/

02.Connections of slip-rings with the winding

13/

04.Connections of commutator segments with the winding

13/

06..Resistive connections between winding and commutator segments, e.g. by high-resistance choke, by transistor

13/

08..Segments formed by extensions of winding

13/

10.Special arrangements of brushes or commutators for the purpose of improving commutation

13/

12.Means for producing an axial reciprocation of the rotor and its associated current collector part, e.g. for polishing commutator surface

13/

14.Circuit arrangements for improvement of commutation, e.g. by use of unidirectionally conductive element


15/

00Methods or apparatus specially adapted for manufacturing, assembling, maintaining, or repairing dynamo-electric machines (manufacture of current collectors in general H01R 43/00)

15/

02.of stator or rotor bodies

15/

03..having permanent magnets  [5]

15/

04.of windings, prior to mounting into the machine (insulating windings H02K 15/10, H02K 15/12; coil manufacture in general H01F 41/02)

15/

06.Embedding prefabricated windings in the machine

15/

08.Forming windings by laying conductors into or around core part

15/

085..by laying conductors into slotted stators

15/

09..by laying conductors into slotted rotors

15/

095..by laying conductors around salient poles

15/

10.Applying solid insulation to the windings, the stator, or the rotor

15/

12.Impregnating, heating or drying of windings, stators, rotors, or machines

15/

14.Casings; Enclosures; Supports

15/

16.Centering the rotor within the stator; Balancing the rotor (balancing in general G01M)


16/

00Machines with more than one rotor or stator  [2]

16/

02.Machines with one stator and two rotors  [2]

16/

04.Machines with one rotor and two stators  [2]

Note

 Group H02K 16/00 takes precedence over groups H02K 17/00 to H02K 53/00.  [2]


17/

00Asynchronous induction motors; Asynchronous induction generators

17/

02.Asynchronous induction motors

17/

04..for single phase current

17/

06...having windings arranged for permitting pole-changing

17/

08...Motors with auxiliary phase obtained by externally fed auxiliary winding, e.g. capacitor motor

17/

10...Motors with auxiliary phase obtained by split-pole carrying short-circuited winding

17/

12..for multi-phase current

17/

14...having windings arranged for permitting pole-changing

17/

16..having rotor with internally short-circuited windings, e.g. cage rotor

17/

18...having double- or multiple-cage rotor

17/

20...having deep-bar rotor

17/

22..having rotor with windings connected to slip-rings

17/

24...in which both stator and rotor are fed with ac

17/

26..having rotor or stator designed to permit synchronous operation

17/

28..having compensating winding for improving phase angle

17/

30..Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the motor, e.g. with impedance, with switch (control arrangements external to the motor H02P)

17/

32..Structural association with auxiliary mechanical devices, e.g. clutch, brake (control arrangements external to the motor H02P)

17/

34..Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter (control of cascade arrangements H02P)

17/

36...with another asynchronous induction motor

17/

38...with a commutator machine

17/

40...with a rotary ac/dc converter (cascade ac/dc converters H02K 47/06)

17/

42.Asynchronous induction generators (H02K 17/02 takes precedence)  [4]

17/

44..Structural association with exciting machine


19/

00Synchronous motors or generators (having permanent magnet H02K 21/00)

19/

02.Synchronous motors

19/

04..for single-phase current

19/

06...Motors having windings on the stator and a variable-reluctance soft-iron rotor without windings, e.g. inductor motor

19/

08...Motors having windings on the stator and a smooth rotor of material with large hysteresis without windings, e.g. hysteresis motor

19/

10..for multi-phase current

19/

12...characterised by the arrangement of exciting windings, e.g. for self-excitation, for compounding, for pole-changing

19/

14..having additional short-circuited winding for starting as an asynchronous motor

19/

16.Synchronous generators

19/

18..having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar generator

19/

20...with variable-reluctance soft-iron rotor without winding

19/

22..having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generator

19/

24...with variable-reluctance soft-iron rotor without winding

19/

26..characterised by the arrangement of exciting winding

19/

28...for self-excitation

19/

30...for compounding

19/

32...for pole-changing

19/

34..Generators with two or more outputs

19/

36..Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the generator, e.g. with impedance, with switch (control arrangements external to the generator H02P)

19/

38..Structural association with exciting machine

  H02K - H02K 7/20    H02K 21/00 - H02K 31/04  
 

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