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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Glossary of power electronics | 2/6 | https://en.wikipedia.org/wiki/Glossary_of_power_electronics | reference | science, encyclopedia | 2026-05-05T07:51:12.696950+00:00 | kb-cron |
circuit off-state interval The interval during which a controllable valve device or an arm consisting of such devices is in the off state.
characteristic (curve) (of a converter) A curve showing the relationship between the values of the output voltage and the values of the output current.
commutating voltage The voltage which causes the current to commutate.
commutation In a power converter the transfer of current from one conducting arm to the next to conduct in sequence, without interruption of the current, both arms conducting simultaneously during a finite time interval.
commutation circuit The circuit consisting of the commutating arms and the source providing the commutating voltage.
commutating group A group of principal arms which commutate cyclically among themselves without intermediate commutation of the current to other principal arms.
commutation capacitor A capacitor included in the commutation circuit to supply commutating voltage.
commutation inductance The resulting inductance in the commutation circuit.
commutation interval The time interval in which commutating arms are carrying principal current simultaneously.
commutation failure A failure to commutate the current from a conducting arm to the succeeding arm.
commutation notch A periodic voltage transient that may appear in the AC side voltage of a line or machine commutated converter due to the commutation.
commutation number The number of commutations from one principal arm to another during one elementary period in each commutating group.
commutation reactor A reactor included in the commutation circuit to increase the commutation inductance.
composite characteristic A characteristic consisting of parts of the stabilized voltage and stabilized current characteristics.
conducting direction (of an electronic valve device or of a valve arm) The direction in which an electronic valve device or a valve arm is capable of conducting current.
conduction interval (of a valve arm) That part of an elementary period in which the valve arm conducts.
conduction ratio The ratio of the conduction interval to the sum of the conduction interval and the idle interval.
conduction through In inverter operation, the situation that a valve arm continues conduction at the end of the normal conduction interval or at the end of the hold-off interval.
(electronic) (power) conversion Change of one or more of the characteristics of an electric power system essentially without appreciable loss of power by means of electronic valve devices.
(electronic) (power) converter An operative unit for electronic power conversion, comprising one or more electronic valve devices, transformers and filters if necessary and auxiliaries if any.
converter connection The electrical arrangement of valve arms and other components essential for the function of the main power circuit of a converter.
converter section of a double converter That part of a double converter in which the main direct current when viewed from the DC terminals always flows in the same direction.
controllable valve device A valve device the current path of which is bistably controlled in its conducting direction.
constant current power supply A power supply that stabilizes output current with respect to changes of influence quantities.
constant voltage power supply A power supply that stabilizes output voltage with respect to changes of influence quantities.
constant voltage or constant current power supply A stabilized power supply that operates as a constant voltage power supply or constant current power supply depending on load conditions.
constant voltage to constant current crossover The behavior of a stabilized power supply that automatically converts the mode of operation from voltage stabilization to current stabilization when the output current reaches a preset value, and vice versa.
continuous flow (of direct current) A flow of direct current which is not periodically interrupted.
conversion factor (in general) The ratio of the fundamental output power or DC output power to the fundamental input power or DC input power.
container temperature rise (△θcase) (capacitor) The difference between the temperature of the hottest point of the container and the temperature of the cooling air.
controlled ideal no-load direct voltage The theoretical no-load direct voltage of an AC/DC converter corresponding to a specified trigger delay angle assuming no threshold voltages of electronic valve devices and no voltage rise at small loads.
controlled conventional no-load direct voltage The mean value of the direct voltage corresponding to a specified trigger delay angle which would be obtained by extrapolating the direct voltage/current characteristic from the region of continuous flow of direct current to zero current.
conventional no-load direct voltage The mean value of the direct voltage which would be obtained by extrapolating the direct voltage/current characteristic. from the region of continuous flow of direct current to zero current at zero trigger delay angle, i.e. without phase control.
cooling-air temperature (θamb) (capacitor) The temperature of the cooling air measured at the hottest position in the bank, under steady-state conditions, midway between two units. If only one unit is involved, it is the temperature measured at a point approximately 0-1 m away from the capacitor container and at two-thirds of the height from its base.
crossover area With stabilized power supplies, the range of values of the output quantities within which a change of mode of operation occurs, e.g. from constant voltage to constant current.
crossover point With stabilized power supplies a point given by the intersection of the lines representing the nominal values of the two stabilized output quantities, usually the centre of the crossover area.
current delay angle The time expressed in angular measure by which the starting instant of current conduction is delayed by phase control.
current pulse width (τ) (capacitor)The time of current flow during the charging or discharging from one voltage value to another of the capacitor. current source inverter current fed inverter A current stiff inverter.
current stiff AC/DC converter An electronic AC/DC converter having an essentially smooth current on the DC side provided e.g. by means to reduce the harmonic currents.
cycloconverter A direct frequency converter.
== D ==
DC capacitor A capacitor essentially designed for operation with direct voltage.DC converter A converter for DC conversion.