G
SECTION G — PHYSICS
  
INSTRUMENTS
 G05
CONTROLLING; REGULATING (specially adapted to a particular field of use, see the relevant subclass for that field, e.g. B23Q)
 G05

Note(s)

  1. This class covers methods, systems, and apparatus for controlling, in general.
  2. In this class, the following terms or expressions are used with the meanings indicated:
    • "controlling" means influencing a variable in any way, e.g. changing its direction or its value (including changing it to or from zero), maintaining it constant, limiting its range of variation;
    • "regulation" means maintaining a variable automatically at a desired value or within a desired range of values. The desired value or range may be fixed, or manually varied, or may vary with time according to a predetermined "programme" or according to variation of another variable. Regulation is a form of control;
    • "automatic control" is often used in the art as a synonym for "regulation".
  3. Attention is drawn to the Notes following the title of section G, especially as regards the definition of the term "variable".
 G05F
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES (regulating the timing or recurrence frequency of pulses in radar or radio navigation systems G01S; closed-loop systems for regulating non-electric variables by electric means G05D; regulating electric power distribution networks H02J; regulating the charging of batteries H02J 7/00; regulating of the output of static converters, e.g. switching regulators, H02M; regulation of the output of electric generators H02N, H02P 9/00, H03L; controlling transformers, reactors or choke coils H02P 13/00; regulating frequency response, gain, maximum output, amplitude or bandwidth of amplifiers H03G; regulating tuning of resonant circuits H03J; regulating characteristics of transmission lines H04B; electric control of X-ray apparatus H05G 1/30)
 G05F

Note(s)

  1. This subclass covers:
    • systems only;
    • use of hydraulic, pneumatic, mechanical, and electrical motors for varying electric characteristics of devices which restore the quantity regulated;
    • the combination of static converters and current or voltage regulators, if the invention resides in the combination.
  2. This subclass does not cover elements per se, which are covered by the relevant subclasses.
 G05F 1/00
Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
 G05F 1/02
·  Regulating electric characteristics of arcs (arrangements for feeding electrodes B23K 9/12, H05B 7/109, H05B 31/18; automatic control of power for heating by discharge H05B 7/148)  [2]
 G05F 1/04
·  ·  by means of saturable magnetic devices
 G05F 1/06
·  ·  by means of discharge tubes
 G05F 1/08
·  ·  by means of semiconductor devices
 G05F 1/10
·  Regulating voltage or current (G05F 1/02 takes precedence; for electric railways B60M 3/02)
 G05F 1/12
·  ·  wherein the variable is actually regulated by the final control device is ac (G05F 1/625 takes precedence)
 G05F 1/13
·  ·  ·  using ferroresonant transformers as final control devices  [4]
 G05F 1/14
·  ·  ·  using tap transformers or tap changing inductors as final control devices
 G05F 1/147
·  ·  ·  ·  with motor driven tap switch  [4]
 G05F 1/153
·  ·  ·  ·  ·  controlled by discharge tubes or semiconductor devices  [4]
 G05F 1/16
·  ·  ·  ·  combined with discharge tubes or semiconductor devices
 G05F 1/18
( covered by G05F 1/16 )
 G05F 1/20
·  ·  ·  ·  ·  semiconductor devices only
 G05F 1/22
·  ·  ·  ·  combined with separate magnetic control devices having a controllable degree of saturation
 G05F 1/24
·  ·  ·  using bucking or boosting transformers as final control devices
 G05F 1/247
·  ·  ·  ·  with motor in control circuit  [4]
 G05F 1/253
·  ·  ·  ·  the transformers including plural windings in series between source and load (G05F 1/247 takes precedence)  [4]
 G05F 1/26
·  ·  ·  ·  combined with discharge tubes or semiconductor devices
 G05F 1/28
( covered by G05F 1/26 )
 G05F 1/30
·  ·  ·  ·  ·  semiconductor devices only
 G05F 1/32
·  ·  ·  using magnetic devices having a controllable degree of saturation as final control devices
 G05F 1/325
·  ·  ·  ·  with specific core structure, e.g. gap, aperture, slot, permanent magnet  [4]
 G05F 1/33
·  ·  ·  ·  with plural windings through which current to be controlled is conducted  [4]
 G05F 1/335
·  ·  ·  ·  ·  on different cores  [4]
 G05F 1/34
·  ·  ·  ·  combined with discharge tubes or semiconductor devices
 G05F 1/36
( covered by G05F 1/34 )
 G05F 1/38
·  ·  ·  ·  ·  semiconductor devices only
 G05F 1/40
·  ·  ·  using discharge tubes or semiconductor devices as final control devices
 G05F 1/42
·  ·  ·  ·  discharge tubes only
 G05F 1/44
·  ·  ·  ·  semiconductor devices only
 G05F 1/445
·  ·  ·  ·  ·  being transistors in series with the load  [3]
 G05F 1/45
·  ·  ·  ·  ·  being controlled rectifiers in series with the load  [3]
 G05F 1/455
·  ·  ·  ·  ·  ·  with phase control  [3]
 G05F 1/46
·  ·  wherein the variable actually regulated by the final control device is dc (G05F 1/625 takes precedence)
 G05F 1/48
( transferred to G05F 1/63, G05F 1/652, G05F 1/656, covered by G05F 1/46 )
 G05F 1/50
( transferred to G05F 1/63, G05F 1/656, covered by G05F 1/46 )
 G05F 1/52
·  ·  ·  using discharge tubes in series with the load as final control devices
 G05F 1/54
·  ·  ·  ·  additionally controlled by the unregulated supply
 G05F 1/56
·  ·  ·  using semiconductor devices in series with the load as final control devices
 G05F 1/563
·  ·  ·  ·  including two stages of regulation, at least one of which is output level responsive, e.g. coarse and fine regulation  [4]
 G05F 1/565
·  ·  ·  ·  sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor (G05F 1/563 takes precedence)  [4]
 G05F 1/567
·  ·  ·  ·  ·  for temperature compensation  [4]
 G05F 1/569
·  ·  ·  ·  ·  for protection  [4]
 G05F 1/571
·  ·  ·  ·  ·  ·  with overvoltage detector  [4]
 G05F 1/573
·  ·  ·  ·  ·  ·  with overcurrent detector  [4]
 G05F 1/575
·  ·  ·  ·  characterised by the feedback circuit  [4]
 G05F 1/577
·  ·  ·  ·  for plural loads  [4]
 G05F 1/58
( transferred to G05F 1/567, G05F 1/569 )
 G05F 1/585
·  ·  ·  ·  ·  providing voltages of opposite polarities  [4]
 G05F 1/59
·  ·  ·  ·  including plural semiconductor devices as final control devices for a single load  [4]
 G05F 1/595
·  ·  ·  ·  ·  semiconductor devices connected in series  [4]
 G05F 1/60
( transferred to G05F 1/652, G05F 1/656, covered by G05F 1/46 )
 G05F 1/607
·  ·  ·  using discharge tubes in parallel with the load as final control devices  [3]
 G05F 1/61
·  ·  ·  ·  including two stages of regulation, at least one of which is output level responsive  [4]
 G05F 1/613
·  ·  ·  using semiconductor devices in parallel with the load as final control devices  [3]
 G05F 1/614
·  ·  ·  ·  including two stages of regulation, at least one of which is output level responsive  [4]
 G05F 1/618
·  ·  ·  using semiconductor devices in series and in parallel with the load as final control devices  [4]
 G05F 1/62
·  ·  ·  using bucking or boosting dc sources
 G05F 1/625
·  ·  wherein it is irrelevant whether the variable actually regulated is ac or dc  [4]
 G05F 1/63
·  ·  ·  using variable impedances in series with the load as final control devices  [4]
 G05F 1/635
·  ·  ·  ·  being Hall effect devices, magnetoresistors or thermistors  [4]
 G05F 1/64
( transferred to H02M 3/00, covered by H02M 1/00 )
 G05F 1/644
·  ·  ·  ·  being pressure-sensitive resistors  [4]
 G05F 1/648
·  ·  ·  ·  being plural resistors among which a selection is made  [4]
 G05F 1/652
·  ·  ·  using variable impedances in parallel with the load as final control devices  [4]
 G05F 1/656
·  ·  ·  using variable impedances in series and in parallel with the load as final control devices  [4]
 G05F 1/66
·  Regulating electric power
 G05F 1/67
·  ·  to the maximum power available from a generator, e.g. from solar cell  [4]
 G05F 1/70
·  Regulating power factor; Regulating reactive current or power  [3]
 G05F 3/00
Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
 G05F 3/02
·  Regulating voltage or current
 G05F 3/04
·  ·  wherein the variable is ac
 G05F 3/06
·  ·  ·  using combinations of saturated and unsaturated inductive devices, e g. combined with resonant circuit
 G05F 3/08
·  ·  wherein the variable is dc
 G05F 3/10
·  ·  ·  using uncontrolled devices with non-linear characteristics
 G05F 3/12
·  ·  ·  ·  being glow discharge tubes
 G05F 3/16
·  ·  ·  ·  being semiconductor devices  [3]
 G05F 3/18
·  ·  ·  ·  ·  using Zener diodes  [3]
 G05F 3/20
·  ·  ·  ·  ·  using diode-transistor combinations (G05F 3/18 takes precedence)  [3]
 G05F 3/22
·  ·  ·  ·  ·  ·  wherein the transistors are of the bipolar type only (G05F 3/26, G05F 3/30 take precedence)  [4]
 G05F 3/24
·  ·  ·  ·  ·  ·  wherein the transistors are of the field-effect type only (G05F 3/26, G05F 3/30 take precedence)  [4]
 G05F 3/26
·  ·  ·  ·  ·  ·  Current mirrors  [4]
 G05F 3/28
·  ·  ·  ·  ·  ·  ·  combined with a non-linear current amplifier  [4]
 G05F 3/30
·  ·  ·  ·  ·  ·  Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities (G05F 3/26 takes precedence)  [4]
 G05F 5/00
Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
 G05F 5/02
·  Phase controlled switching using electronic tubes or three or more terminal semiconductive devices  [4]
 G05F 5/04
·  using a transformer or inductor as the final control device  [4]
 G05F 5/06
·  ·  saturable  [4]
 G05F 5/08
·  using a linearly acting final control device  [4]
 G05F 7/00
Regulating magnetic variables