Attention is drawn to the notes (particularly the definition of the term "variable") on page 7 of this Section.
This class covers methods, systems, and apparatus for controlling in general.
In this class, the following terms 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; the term "automatic control" is often used in the art as a synonym for "regulation".
This sub-class includes the use of hydraulic, pneumatic, mechanical, and electrical motors for varying electric characteristics of devices which restore the quantity regulated.
This sub-class is restricted to systems, the elements per se being in the relevant sub-classes.
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
using tap transformers or variable inductors as final control devices
G05F 1/16
· · · ·
combined with discharge tubes or semiconductor devices
G05F 1/18
· · · · ·
discharge tubes only
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 1/26
· · · ·
combined with discharge tubes or semiconductor devices
G05F 1/28
· · · · ·
discharge tubes only
G05F 1/30
· · · · ·
semiconductor devices only
G05F 1/32
· · ·
using magnetic devices having a controllable degree of saturation as final control devices
G05F 1/34
· · · ·
combined with discharge tubes or semiconductor devices
G05F 1/36
· · · · ·
discharge tubes only
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 is dc
G05F 1/48
· · ·
using variable impedances as final control devices
G05F 1/50
· · · ·
in series with the load
G05F 1/52
· · · · ·
being discharge tubes
G05F 1/54
· · · · · ·
additionally controlled by the unregulated supply
G05F 1/56
· · · · ·
being semiconductor devices
G05F 1/58
· · · · · ·
combined with overload protection; combined with temperature compensation
G05F 1/60
· · · ·
in parallel with the load
G05F 1/607
· · · · ·
being discharge tubes [3]
G05F 1/613
· · · · ·
being semiconductor devices [3]
G05F 1/62
· · ·
using bucking or boosting dc sources
G05F 1/64
· ·
wherein the variable is dc and there is conversion between the unregulated supply and the regulated output to the load (regulating converters Fulltext... Hierarchy... Expanded...H02P)
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
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