H
SECTION H — ELECTRICITY
 H

Note(s)

These Notes cover the basic principles and general instructions for use of section H.

  1. Section H covers:
    1. basic electric elements, which cover all electric units and the general mechanical structure of apparatus and circuits, including the assembly of various basic elements into what are called printed circuits and also cover to a certain extent the manufacture of these elements (when not covered elsewhere);
    2. generation of electricity, which covers the generation, conversion and distribution of electricity together with the controlling of the corresponding gear;
    3. applied electricity, which covers:
      1. general utilisation techniques, viz. those of electric heating and electric lighting circuits;
      2. some special utilisation techniques, either electric or electronic in the strict sense, which are not covered by other sections of the Classification, including:
        1. electric light sources, including lasers;
        2. electric X-ray technique;
        3. electric plasma technique and the generation and acceleration of electrically charged particles or neutrons;
    4. basic electronic circuits and their control;
    5. radio or electric communication technique;
    6. the use of a specified material for the manufacture of the article or element described. In this connection, paragraphs 88 to 90 of the Guide should be referred to.
  2. In this section, the following general rules apply:
    1. Subject to the exceptions stated in I(c), above, any electric aspect or part peculiar to a particular operation, process, apparatus, object or article, classified in one of the sections of the Classification other than section H, is always classified in the subclass for that operation, process, apparatus, object or article. Where common characteristics concerning technical subjects of similar nature have been brought out at class level, the electric aspect or part is classified, in conjunction with the operation, process, apparatus, object or article, in a subclass which covers entirely the general electrical applications for the technical subject in question;
    2. The electrical applications referred to under (a), above, either general or particular, include:
      1. the therapeutic processes and apparatus, in class A61;
      2. the electric processes and apparatus used in various laboratory or industrial operations, in classes B01 and B03 and in subclass B23K;
      3. the electricity supply, electric propulsion and electric lighting of vehicles in general and of particular vehicles, in the subsection "Transporting" of section B;
      4. the electric ignition systems of internal-combustion engines, in subclass F02P, and of combustion apparatus in general, in subclass F23Q;
      5. the whole electrical part of section G, i.e. measuring devices including apparatus for measuring electric variables, checking, signalling and calculating. Electricity in that section is generally dealt with as a means and not as an end in itself;
    3. All electrical applications, both general and particular, presuppose that the "basic electricity" aspect appears in section H (see I(a) above) as regards the electric "basic elements" which they comprise. This rule is also valid for applied electricity, referred to in I(c), above, which appears in section H itself.
  3. In this section, the following special cases occur:
    1. Among the general applications covered by sections other than section H, it is worth noting that electric heating in general is covered by subclasses F24D or F24H or class F27, and that electric lighting in general is partly covered by class F21, since in section H (see I(c), above) there are places in H05B which cover the same technical subjects;
    2. In the two cases referred to under (a), above, the subclasses of section F, which deal with the respective subjects, essentially cover in the first place the whole mechanical aspect of the apparatus or devices, whereas the electrical aspect, as such, is covered by subclass H05B;
    3. In the case of lighting, this mechanical aspect should be taken to cover the material arrangement of the various electric elements, i.e., their geometrical or physical position in relation to one another; this aspect is covered by subclass F21V, the elements themselves and the primary circuits remaining in section H. The same applies to electric light sources, when combined with light sources of a different kind. These are covered by subclass H05B, whereas the physical arrangement which their combination constitutes is covered by the various subclasses of class F21;
    4. As regards heating, not only the electric elements and circuitry designs, as such, are covered by subclass H05B, but also the electric aspects of their arrangement, where these concern cases of general application; electric furnaces being considered as such. The physical disposition of the electric elements in furnaces is covered by section F. If a comparison is made with electric welding circuits, which are covered by subclass B23K in connection with welding, it can be seen that electric heating is not covered by the general rule stated in II, above.

 H02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
 H02K
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)
 H02K

Note(s)

  1. This subclass covers the structural adaptation of the machines for the purposes of their control.
  2. This subclass does not cover starting, regulating, electronically commutating, braking, or otherwise controlling motors, generators or dynamo-electric converters, in general, which are covered by subclass H02P.
  3. Attention is drawn to the Notes following the titles of class B81 and subclass B81B relating to "micro-structural devices" and "micro-structural systems". [7]
 H02K
Subclass index
GENERATORS OR MOTORS
Continuously rotating
ac machines: asynchronous; synchronous; with mechanical commutator 17/00; 19/00, 21/00; 27/00
dc machines or universal ac/dc motors: with mechanical commutator; with interrupter 23/00; 25/00
with non-mechanical commutating devices 29/00
Acyclic machines; oscillating machines; motors rotating step by step 31/00; 33/00, 35/00; 37/00
Generators producing a non-sinusoidal waveform 39/00
Machines with more than one rotor or stator 16/00
SPECIAL DYNAMO-ELECTRIC APPARATUS
Machines for transmitting angular displacements; torque motors 24/00; 26/00
Machines involving dynamo-electric interaction with a plasma or a flow of conductive liquid or of fluid-borne conductive or magnetic particles 44/00
Systems for propulsing a rigid body along a path 41/00
Converters 47/00
Dynamo-electric clutches or brakes; dynamo-electric gears 49/00; 51/00
Alleged perpetua mobilia53/00
Machines operating at cryogenic temperatures 55/00
Machines not otherwise provided for 57/00
DETAILS
Magnetic circuits; windings; casings 1/00; 3/00; 5/00
Arrangements structurally associated with the machine for handling mechanical energy; cooling; measuring or protective devices; current collection or commutation 7/00; 9/00; 11/00; 13/00
MANUFACTURE 15/00
P:260 H02K 1/00
Details of the magnetic circuit (magnetic circuits or magnets in general, magnetic circuits for transformers for power supply H01F; magnetic circuits for relays H01H 50/16)
 H02K 1/02
·  characterised by the magnetic material
 H02K 1/04
·  characterised by the material used for insulating the magnetic circuit or parts thereof (insulation of windings H02K 3/30)
 H02K 1/06
·  characterised by the shape, form, or construction
 H02K 1/08
·  ·  Salient poles
 H02K 1/10
·  ·  ·  Commutating poles
 H02K 1/12
·  ·  Stationary parts of the magnetic circuit
 H02K 1/14
·  ·  ·  Stator cores with salient poles
 H02K 1/16
·  ·  ·  Stator cores with slots for windings
 H02K 1/17
·  ·  ·  Stator cores with permanent magnets  [5]
 H02K 1/18
·  ·  ·  Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
 H02K 1/20
·  ·  ·  with channels or ducts for flow of cooling medium
 H02K 1/22
·  ·  Rotating parts of magnetic circuit
 H02K 1/24
·  ·  ·  Rotor cores with salient poles
 H02K 1/26
·  ·  ·  Rotor cores with slots for windings
 H02K 1/27
·  ·  ·  Rotor cores with permanent magnets  [5]
 H02K 1/28
·  ·  ·  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
 H02K 1/30
·  ·  ·  ·  using intermediate part or parts, e.g. spider
 H02K 1/32
·  ·  ·  with channels or ducts for flow of cooling medium
 H02K 1/34
·  ·  Reciprocating, oscillating, or vibrating part of magnetic circuit
P:270 H02K 3/00
Details of windings (coils in general H01F 5/00)
 H02K 3/02
·  Windings characterised by the conductor material (conductors in general H01B 1/00, H01B 5/00)
 H02K 3/04
·  Windings characterised by the conductor shape, form, or construction, e.g. with bar conductor
 H02K 3/12
·  ·  arranged in slots
 H02K 3/14
·  ·  ·  with transposed conductors, e.g. twisted conductor
 H02K 3/16
·  ·  ·  for damping, commutating, or other auxiliary purposes
 H02K 3/18
·  ·  Windings for salient poles
 H02K 3/20
·  ·  ·  for damping, commutating, or other auxiliary purposes
 H02K 3/22
·  ·  consisting of hollow conductors
 H02K 3/24
·  ·  with channels or ducts between the conductors for flow of cooling medium
 H02K 3/26
·  ·  consisting of printed conductors
 H02K 3/28
·  ·  Layout of windings or of connections between windings (windings for pole-changing H02K 17/06, H02K 17/14, H02K 19/12, H02K 19/32)
 H02K 3/30
·  Windings characterised by the insulating material (insulating bodies in general H01B 3/00, H01B 17/00)
 H02K 3/32
·  Windings characterised by the shape, form, or construction of the insulation
 H02K 3/34
·  ·  between conductors or between conductor and core, e.g. slot insulation  [3]
 H02K 3/38
·  ·  around winding heads, equalising connectors, or connections thereto
 H02K 3/40
·  ·  for high voltage, e.g. affording protection against corona
 H02K 3/42
·  Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding  [2]
 H02K 3/44
·  Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas
 H02K 3/46
·  Fastening of windings on stator or rotor structure
 H02K 3/47
·  ·  Air-gap windings, i.e. iron-free windings  [3]
 H02K 3/48
·  ·  in slots
 H02K 3/487
·  ·  ·  Slot-closing devices  [3]
 H02K 3/493
·  ·  ·  ·  where the devices are magnetic  [3]
 H02K 3/50
·  ·  Fastening of winding heads, equalising connectors, or connections thereto
 H02K 3/51
·  ·  ·  applicable to rotors only  [3]
 H02K 3/52
·  ·  Fastening salient pole windings or connections thereto
P:290 H02K 5/00
Casings; Enclosures; Supports (casings for electric apparatus in general H05K 5/00)
 H02K 5/02
·  Casings or enclosures characterised by the material thereof
 H02K 5/04
·  Casings or enclosures characterised by the shape, form, or construction thereof
 H02K 5/06
·  ·  Cast metal casings
 H02K 5/08
·  ·  Insulating casings
 H02K 5/10
·  ·  affording protection from ingress, e.g. of water, of fingers
 H02K 5/12
·  ·  specially adapted for operating in liquid or gas (combined with cooling arrangements H02K 9/00)
 H02K 5/124
·  ·  ·  Sealing of the shaft  [3]
 H02K 5/128
·  ·  ·  using air-gap sleeve or air-gap disc  [3]
 H02K 5/132
·  ·  ·  Submersible electric motor (H02K 5/128 takes precedence; pumping installations or systems for submerged use F04D 13/08)  [3]
 H02K 5/136
·  ·  ·  explosion-proof  [3]
 H02K 5/14
·  ·  Means for supporting or protecting brushes or brush holders  [3]
 H02K 5/15
·  ·  Mounting arrangements for bearing-shields or end plates  [3]
 H02K 5/16
·  ·  Means for supporting bearings, e.g. insulating support, means for fitting the bearing in the bearing-shield (magnetic bearings H02K 7/09)
 H02K 5/167
·  ·  ·  using sliding-contact or spherical cap bearings  [3]
 H02K 5/173
·  ·  ·  using ball bearings or bearings with rolling contact  [3]
 H02K 5/18
·  ·  with ribs or fins for improving heat transfer
 H02K 5/20
·  ·  with channels or ducts for flow of cooling medium
 H02K 5/22
·  ·  Other additional parts of casings, e.g. shaped to form connection or terminal box
 H02K 5/24
·  specially adapted for suppression or reduction of noise or vibration
 H02K 5/26
·  Means for adjusting the casing relative to its support
P:0 H02K 7/00
Arrangements for handling mechanical energy structurally associated with the machine, e.g. structural association with mechanical driving motor or auxiliary dynamo-electric machine
 H02K 7/02
·  Additional mass for increasing inertia, e.g. flywheel
 H02K 7/04
·  Balancing means
 H02K 7/06
·  Means for converting reciprocating into rotary motion or vice versa
 H02K 7/065
·  ·  Electromechanical oscillators; Vibrating magnetic drives (in time-pieces G04C 5/00)  [3]
 H02K 7/07
·  ·  using pawl and ratchet wheel  [3]
 H02K 7/075
·  ·  using crankshaft or eccentric  [3]
 H02K 7/08
·  Structural association with bearings (support in machine casing H02K 5/16)
 H02K 7/09
·  ·  with magnetic bearings  [3]
 H02K 7/10
·  Structural association with clutches, brakes, gears, pulleys, mechanical starters
 H02K 7/102
·  ·  with friction brakes
 H02K 7/104
·  ·  with eddy-current brakes
 H02K 7/106
·  ·  with dynamo-electric brakes
 H02K 7/108
·  ·  with friction clutches
 H02K 7/11
·  ·  with dynamo-electric clutches
 H02K 7/112
·  ·  with friction clutches and brakes
 H02K 7/114
·  ·  with dynamo-electric clutches and brakes
 H02K 7/116
·  ·  with gears
 H02K 7/118
·  ·  with starting device
 H02K 7/12
·  ·  with auxiliary limited movement of stator, rotor, or core parts, e.g. rotor axially movable for the purpose of clutching or braking
 H02K 7/14
·  Structural association with mechanical load, e.g. hand-held machine tool, fan (with fan or impeller for cooling the machine H02K 9/06; for suction cleaners A47L)
 H02K 7/16
·  ·  for operation above critical speed of vibration of rotating parts
 H02K 7/18
·  Structural association of electric generator with mechanical driving motor, e.g. turbine (if the driving-motor aspect predominates, see the relevant place of section F, e.g. F03B 13/00)
 H02K 7/20
·  Structural association with auxiliary dynamo-electric machine, e.g. with electric starter motor, with exciter
P:280 H02K 9/00
Systems 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)
 H02K 9/02
·  by ambient air flowing through the machine
 H02K 9/04
·  ·  having means for generating flow of cooling medium, e.g. having fan
 H02K 9/06
·  ·  ·  with fan or impeller driven by the machine shaft
 H02K 9/08
·  by gaseous cooling medium circulating wholly within the machine casing (H02K 9/10 takes precedence)
 H02K 9/10
·  by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
 H02K 9/12
·  ·  wherein the cooling medium circulates freely within the casing
 H02K 9/14
·  wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
 H02K 9/16
·  ·  wherein the cooling medium circulates through ducts or tubes within the casing
 H02K 9/18
·  ·  wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
 H02K 9/19
·  for machines with closed casing and with closed-circuit cooling using a liquid cooling medium, e.g. oil
 H02K 9/193
·  ·  with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
 H02K 9/197
·  ·  in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
 H02K 9/20
·  ·  wherein the cooling medium vaporises within the machine casing
 H02K 9/22
·  by solid heat conducting material embedded in, or arranged in contact with, stator or rotor, e.g. heat bridge
 H02K 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)
 H02K 9/26
·  Structural association with machine of devices for cleaning or drying cooling medium, e.g. of filter
 H02K 9/28
·  Cooling of commutators, slip-rings, or brushes, e.g. by ventilating (current collectors in general H01R 39/00)
P:250 H02K 11/00
Structural association with measuring or protective devices or electric components, e.g. with resistor, with switch, with suppressor for radio interference
 H02K 11/02
·  for suppression of radio interference  [6]
 H02K 11/04
·  for rectification  [6]
P:240 H02K 13/00
Structural 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
 H02K 13/02
·  Connections of slip-rings with the winding
 H02K 13/04
·  Connections of commutator segments with the winding
 H02K 13/06
·  ·  Resistive connections between winding and commutator segments, e.g. by high-resistance choke, by transistor
 H02K 13/08
·  ·  Segments formed by extensions of winding
 H02K 13/10
·  Special arrangements of brushes or commutators for the purpose of improving commutation
 H02K 13/12
·  Means for producing an axial reciprocation of the rotor and its associated current collector part, e.g. for polishing commutator surface
 H02K 13/14
·  Circuit arrangements for improvement of commutation, e.g. by use of unidirectionally conductive element
P:300 H02K 15/00
Methods or apparatus specially adapted for manufacturing, assembling, maintaining, or repairing dynamo-electric machines (manufacture of current collectors in general H01R 43/00)
 H02K 15/02
·  of stator or rotor bodies
 H02K 15/03
·  ·  having permanent magnets  [5]
 H02K 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)
 H02K 15/06
·  Embedding prefabricated windings in the machine
 H02K 15/08
·  Forming windings by laying conductors into or around core part
 H02K 15/085
·  ·  by laying conductors into slotted stators
 H02K 15/09
·  ·  by laying conductors into slotted rotors
 H02K 15/095
·  ·  by laying conductors around salient poles
 H02K 15/10
·  Applying solid insulation to the windings, the stator, or the rotor
 H02K 15/12
·  Impregnating, heating or drying of windings, stators, rotors, or machines
 H02K 15/14
·  Casings; Enclosures; Supports
 H02K 15/16
·  Centering the rotor within the stator; Balancing the rotor (balancing in general G01M)
P:20 H02K 16/00
Machines with more than one rotor or stator  [2]
 H02K 16/02
·  Machines with one stator and two rotors  [2]
 H02K 16/04
·  Machines with one rotor and two stators  [2]
 H02K 17/00 - 
H02K 53/00

Note(s)

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

P:210 H02K 17/00
Asynchronous induction motors; Asynchronous induction generators
 H02K 17/02
·  Asynchronous induction motors
 H02K 17/04
·  ·  for single phase current
 H02K 17/06
·  ·  ·  having windings arranged for permitting pole-changing
 H02K 17/08
·  ·  ·  Motors with auxiliary phase obtained by externally fed auxiliary winding, e.g. capacitor motor
 H02K 17/10
·  ·  ·  Motors with auxiliary phase obtained by split-pole carrying short-circuited winding
 H02K 17/12
·  ·  for multi-phase current
 H02K 17/14
·  ·  ·  having windings arranged for permitting pole-changing
 H02K 17/16
·  ·  having rotor with internally short-circuited windings, e.g. cage rotor
 H02K 17/18
·  ·  ·  having double- or multiple-cage rotor
 H02K 17/20
·  ·  ·  having deep-bar rotor
 H02K 17/22
·  ·  having rotor with windings connected to slip-rings
 H02K 17/24
·  ·  ·  in which both stator and rotor are fed with ac
 H02K 17/26
·  ·  having rotor or stator designed to permit synchronous operation
 H02K 17/28
·  ·  having compensating winding for improving phase angle
 H02K 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)
 H02K 17/32
·  ·  Structural association with auxiliary mechanical devices, e.g. clutch, brake (control arrangements external to the motor H02P)
 H02K 17/34
·  ·  Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter (control of cascade arrangements H02P)
 H02K 17/36
·  ·  ·  with another asynchronous induction motor
 H02K 17/38
·  ·  ·  with a commutator machine
 H02K 17/40
·  ·  ·  with a rotary ac/dc converter (cascade ac/dc converters H02K 47/06)
 H02K 17/42
·  Asynchronous induction generators (H02K 17/02 takes precedence)  [4]
 H02K 17/44
·  ·  Structural association with exciting machine
P:150 H02K 19/00
Synchronous motors or generators (having permanent magnet H02K 21/00)
 H02K 19/02
·  Synchronous motors
 H02K 19/04
·  ·  for single-phase current
 H02K 19/06
·  ·  ·  Motors having windings on the stator and a variable-reluctance soft-iron rotor without windings, e.g. inductor motor
 H02K 19/08
·  ·  ·  Motors having windings on the stator and a smooth rotor of material with large hysteresis without windings, e.g. hysteresis motor
 H02K 19/10
·  ·  for multi-phase current
 H02K 19/12
·  ·  ·  characterised by the arrangement of exciting windings, e.g. for self-excitation, for compounding, for pole-changing
 H02K 19/14
·  ·  having additional short-circuited winding for starting as an asynchronous motor
 H02K 19/16
·  Synchronous generators
 H02K 19/18
·  ·  having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar generator
 H02K 19/20
·  ·  ·  with variable-reluctance soft-iron rotor without winding
 H02K 19/22
·  ·  having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generator
 H02K 19/24
·  ·  ·  with variable-reluctance soft-iron rotor without winding
 H02K 19/26
·  ·  characterised by the arrangement of exciting winding
 H02K 19/28
·  ·  ·  for self-excitation
 H02K 19/30
·  ·  ·  for compounding
 H02K 19/32
·  ·  ·  for pole-changing
 H02K 19/34
·  ·  Generators with two or more outputs
 H02K 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)
 H02K 19/38
·  ·  Structural association with exciting machine
P:140 H02K 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)
 H02K 21/02
·  Details
 H02K 21/04
·  ·  Windings on magnet for additional excitation
 H02K 21/10
·  ·  Rotating armatures
 H02K 21/12
·  with stationary armature and rotating magnet
 H02K 21/14
·  ·  magnet rotating within armature
 H02K 21/16
·  ·  ·  having an annular armature core with salient poles (with homopolar co-operation H02K 21/20)
 H02K 21/18
·  ·  ·  having horse-shoe armature core (with homopolar co-operation H02K 21/20)
 H02K 21/20
·  ·  ·  having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar machine
 H02K 21/22
·  ·  magnet rotating around armature, e.g. flywheel magneto
 H02K 21/24
·  ·  magnet axially facing armature, e.g. hub-type cycle dynamo
 H02K 21/26
·  with rotating armature and stationary magnet
 H02K 21/28
·  ·  armature rotating within magnet
 H02K 21/30
·  ·  ·  having an annular armature core with salient poles (with homopolar co-operation H02K 21/36)
 H02K 21/32
·  ·  ·  having a horse-shoe magnet (with homopolar co-operation H02K 21/36)
 H02K 21/34
·  ·  ·  having bell-shaped or bar-shaped magnet, e.g. for cycle lighting (with homopolar co-operation H02K 21/36)
 H02K 21/36
·  ·  ·  with homopolar co-operation
 H02K 21/38
·  with rotating flux distributor, and armature and magnet both stationary
 H02K 21/40
·  ·  flux distributor rotating around magnet and within armature
 H02K 21/42
·  ·  flux distributor rotating around armature and within magnet
 H02K 21/44
·  ·  armature windings wound upon magnet
 H02K 21/46
·  Motors having additional short-circuited winding for starting as an asynchronous motor
 H02K 21/48
·  Generators with two or more outputs
P:190 H02K 23/00
Dc commutator motors or generators having mechanical commutator; Universal ac/dc commutator motors
 H02K 23/02
·  characterised by the exciting arrangement
 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 23/10
·  ·  having compound connection of excitation windings
 H02K 23/12
·  ·  having excitation produced by a current source 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, by pole switching
 H02K 23/18
·  ·  having displaceable main or auxiliary brushes
 H02K 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
 H02K 23/22
·  ·  having compensating or damping winding
 H02K 23/24
·  ·  having commutating-pole winding
 H02K 23/26
·  characterised by the armature winding
 H02K 23/28
·  ·  having open winding, i.e. not closed within armature
 H02K 23/30
·  ·  having lap winding; having loop winding
 H02K 23/32
·  ·  having wave winding; having undulating winding
 H02K 23/34
·  ·  having mixed windings
 H02K 23/36
·  ·  having more than one winding; having more than one commutator; having more than one stator
 H02K 23/38
·  ·  having winding or connection for improving commutation, e.g. equipotential connection
 H02K 23/40
·  characterised by the arrangement of the magnet circuit
 H02K 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
 H02K 23/44
·  ·  having movable or turnable iron parts
 H02K 23/46
·  ·  having stationary shunts, i.e. magnetic cross flux
 H02K 23/48
·  ·  having adjustable armature
 H02K 23/50
·  Generators with two or more outputs
 H02K 23/52
·  Motors acting also as generators, e.g. starting motor used as generator for ignition or lighting
 H02K 23/54
·  Disc armature motors or generators
 H02K 23/56
·  Motors or generators having the iron core separated from armature winding
 H02K 23/58
·  Motors or generators having no iron core
 H02K 23/60
·  Motors or generators having a rotating armature and a rotating excitation field
 H02K 23/62
·  Motors or generators with stationary armature and rotating excitation field
 H02K 23/64
·  Motors specially adapted for running on dc or ac by choice
 H02K 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)
 H02K 23/68
·  Structural association with auxiliary mechanical devices, e.g. with clutch, with brake (control arrangements external to the machine H02P)
P:80 H02K 24/00
Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
P:180 H02K 25/00
Dc interrupter motors or generators
P:170 H02K 26/00
Machines adapted to function as torque motors, i.e. to exert a torque when stalled
P:200 H02K 27/00
Ac commutator motors or generators having mechanical commutator (universal ac/dc motors H02K 23/64)
 H02K 27/02
·  characterised by the armature winding
 H02K 27/04
·  having single-phase operation in series or shunt connection
 H02K 27/06
·  ·  with a single or multiple short-circuited commutator, e.g. repulsion motor
 H02K 27/08
·  ·  with multiple-fed armature
 H02K 27/10
·  ·  with switching devices for different modes of operation, e.g. repulsion-induction motor
 H02K 27/12
·  having multi-phase operation
 H02K 27/14
·  ·  in series connection
 H02K 27/16
·  ·  in shunt connection with stator feeding
 H02K 27/18
·  ·  in shunt connection with rotor feeding
 H02K 27/20
·  Structural association with a speed regulating device
 H02K 27/22
·  having means for improving commutation, e.g. auxiliary fields, double windings, double brushes
 H02K 27/24
·  having two or more commutators
 H02K 27/26
·  having disc armature
 H02K 27/28
·  Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine (control arrangements external to the machine H02P)
 H02K 27/30
·  Structural association with auxiliary mechanical devices, e.g. clutch, brake (control arrangements external to the machine H02P)
P:70 H02K 29/00
Motors or generators having non-mechanical commutating devices, e.g. discharge tubes, semiconductor devices
 H02K 29/03
·  with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems  [6]
 H02K 29/06
·  with position sensing devices (H02K 29/03 takes precedence)  [4,6]
 H02K 29/08
·  ·  using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K 29/12 takes precedence)  [4]
 H02K 29/10
·  ·  using light effect devices  [4]
 H02K 29/12
·  ·  using detecting coils  [4]
 H02K 29/14
·  with speed sensing devices (H02K 29/03 takes precedence)  [4,6]
P:160 H02K 31/00
Acyclic motors or generators, i.e. dc machines having a drum or disc armature with continuous current collectors
 H02K 31/02
·  with solid-contact collectors
 H02K 31/04
·  with at least one liquid-contact collector
P:100 H02K 33/00
Motors with reciprocating, oscillating, or vibrating magnet, armature, or coil system (arrangements for handling mechanical energy structurally associated with motors H02K 7/00, e.g. H02K 7/06)
 H02K 33/02
·  with armature moved one way by energisation of a single coil system and returned by mechanical force, e.g. by spring
 H02K 33/04
·  ·  wherein the frequency of operation is determined by the frequency of uninterrupted ac energisation
 H02K 33/06
·  ·  ·  with polarised armature
 H02K 33/08
·  ·  ·  with dc energisation superimposed on ac energisation
 H02K 33/10
·  ·  wherein the alternate energisation and de-energisation of the single coil system is effected or controlled by movement of the armature
 H02K 33/12
·  with armature moving in alternate directions by alternate energisation of two coil systems
 H02K 33/14
·  ·  wherein the alternate energisation and de-energisation of the two coil systems are effected or controlled by movement of the armature
 H02K 33/16
·  with polarised armature moving in alternate directions by reversal or energisation of a single coil system
 H02K 33/18
·  with coil system moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnet
P:110 H02K 35/00
Generators with reciprocating, oscillating, or vibrating coil system, magnet, armature, or other part of the magnetic circuit (arrangements for handling mechanical energy structurally associated with generators H02K 7/00, e.g. H02K 7/06)
 H02K 35/02
·  with moving magnet and stationary coil system
 H02K 35/04
·  with moving coil system and stationary magnet
 H02K 35/06
·  with moving flux distributor, and both coil system and magnet stationary
P:130 H02K 37/00
Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
 H02K 37/02
·  variable reluctance type  [4]
 H02K 37/04
·  ·  Rotor situated within stator  [4]
 H02K 37/06
·  ·  Rotor situated around stator  [4]
 H02K 37/08
·  ·  Rotor axially facing stator  [4]
 H02K 37/10
·  permanent magnet type (H02K 37/02 takes precedence)  [4]
 H02K 37/12
·  ·  with stationary armature and rotating magnet  [4]
 H02K 37/14
·  ·  ·  Magnet rotating within armature  [4]
 H02K 37/16
·  ·  ·  ·  having horseshoe armature core  [4]
 H02K 37/18
·  ·  ·  ·  homopolar type  [4]
 H02K 37/20
·  ·  with rotating flux distributor, the armature and magnet both being stationary  [4]
 H02K 37/22
·  Damping units  [4]
 H02K 37/24
·  Structural association with auxiliary mechanical devices  [4]
P:120 H02K 39/00
Generators specially adapted for producing a desired non-sinusoidal waveform
P:90 H02K 41/00
Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
 H02K 41/02
·  Linear motors; Sectional motors  [3]
 H02K 41/025
·  ·  Asynchronous motors  [3]
 H02K 41/03
·  ·  Synchronous motors; Motors moving step by step; Reluctance motors (H02K 41/035 takes precedence)  [3]
 H02K 41/035
·  ·  Dc motors; Unipolar motors  [3]
 H02K 41/06
·  Rolling motors, i.e. having the rotor axis parallel to the stator axis and following a circular path as the rotor rolls around the inside or outside of the stator
P:30 H02K 44/00
Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or vice versa  [3]
 H02K 44/02
·  Electrodynamic pumps  [3]
 H02K 44/04
·  ·  Conduction pumps  [3]
 H02K 44/06
·  ·  Induction pumps  [3]
 H02K 44/08
·  Magnetohydrodynamic (MHD) generators  [3]
 H02K 44/10
·  ·  Constructional details of electrodes  [3]
 H02K 44/12
·  ·  Constructional details of fluid channel  [3]
 H02K 44/14
·  ·  ·  Circular or screw-shaped channel  [3]
 H02K 44/16
·  ·  Constructional details of the magnetic circuit  [3]
 H02K 44/18
·  ·  for generating ac power  [3]
 H02K 44/20
·  ·  ·  by changing the polarity of the magnetic field  [3]
 H02K 44/22
·  ·  ·  by changing the conductivity of the fluid  [3]
 H02K 44/24
·  ·  ·  by reversing the direction of fluid  [3]
 H02K 44/26
·  ·  ·  by creating a travelling magnetic field  [3]
 H02K 44/28
·  Association of MHD generators with conventional generators (nuclear power plants including a MHD generator G21D 7/02)  [3]
P:40 H02K 47/00
Dynamo-electric converters
 H02K 47/02
·  Ac/dc converters or vice versa
 H02K 47/04
·  ·  Motor/generators
 H02K 47/06
·  ·  Cascade converters
 H02K 47/08
·  ·  Single-armature converters
 H02K 47/10
·  ·  ·  with booster machine on the ac side
 H02K 47/12
·  Dc/dc converters
 H02K 47/14
·  ·  Motor/generators
 H02K 47/16
·  ·  Single-armature converters, e.g. metadyne
 H02K 47/18
·  Ac/ac converters
 H02K 47/20
·  ·  Motor/generators
 H02K 47/22
·  ·  Single-armature frequency converters with or without phase-number conversion
 H02K 47/24
·  ·  ·  having windings for different numbers of poles
 H02K 47/26
·  ·  ·  operating as under- or over-synchronously running asynchronous induction machines, e.g. cascade arrangement of asynchronous and synchronous machines
 H02K 47/28
·  ·  ·  operating as commutator machines with added slip-rings
 H02K 47/30
·  ·  Single-armature phase-number converters without frequency conversion
P:60 H02K 49/00
Dynamo-electric clutches; Dynamo-electric brakes (electrically or magnetically actuated clutches or brakes F16D 27/00, F16D 29/00, F16D 65/34, F16D 65/36; magnetic-particle clutches F16D 37/02; adapted for use as dynamometers G01L)
 H02K 49/02
·  of the asynchronous induction type
 H02K 49/04
·  ·  of the eddy-current hysteresis type
 H02K 49/06
·  of the synchronous type
 H02K 49/08
·  of the collector armature type
 H02K 49/10
·  of the permanent-magnet type
 H02K 49/12
·  of the acyclic type
P:50 H02K 51/00
Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts
P:220 H02K 53/00
Alleged dynamo-electric perpetua mobilia
P:10 H02K 55/00
Dynamo-electric machines having windings operating at cryogenic temperatures  [3]
 H02K 55/02
·  of the synchronous type  [3]
 H02K 55/04
·  ·  with rotating field windings  [3]
 H02K 55/06
·  of the homopolar type  [3]
P:230 H02K 57/00
Dynamo-electric machines not provided for in groups H02K 17/00-H02K 55/00  [3]