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Glossary of power electronics 6/6 https://en.wikipedia.org/wiki/Glossary_of_power_electronics reference science, encyclopedia 2026-05-05T07:51:12.696950+00:00 kb-cron

stabilized power supply In the field of power electronics an equipment which takes electrical energy from a source and supplies it stabilized by means inside the equipment to one or more pairs of output terminals.

stage (of a series connection) A part of a series connection of two or more converter connections consisting of one or more parallel connected converter connections.

steady-state condition (capacitor) Thermal equilibrium attained by the capacitor at constant output and at constant cooling-air temperature.

symmetrical phase control Phase control with equal delay angles in all principal arms of a fully controllable converter connection or commutating group.

switched valve device A controllable valve device which may be turned on and off by a control signal.

== T ==

tangent of the loss angle (tanδ) of a capacitor The ratio between the equivalent series resistance and the capacitive reactance of a capacitor at specified sinusoidal alternating voltage and frequency. threshold voltage (of an electronic valve device) The value of the voltage obtained at the intersection of the voltage axis and the straight line approximation of the on-state characteristic of an electronic valve device.

transfer factor (of a DC converter) The ratio of the voltage on the load side and the voltage on the source side.

transition current The mean direct current of a converter connection when the direct current(s) of the commutation group(s) become(s) intermittent when decreasing the current.

trigger advance angle The time expressed in angular measure by which the trigger pulse is advanced with respect to the reference instant.

trigger delay angle The time expressed in angular measure by which the trigger pulse is delayed with respect to the reference instant in the case of phase control.

triggering The control action to achieve firing of a latching valve device or an arm consisting of such devices.

tolerance band With stabilized power supplies the range of steady-state values of a stabilized output quantity lying between specified limits of deviation from a preset value, e.g. a nominal value.

total direct voltage regulation The direct voltage regulation including the effect of the AC system impedance.

total harmonic distortion THD The ratio of the rms value of the harmonic content of an alternating quantity to the rms value of the fundamental component of the quantity.

turn-off arm An auxiliary arm which temporarily takes over the current directly from a conducting valve arm, consisting of one or more latching valve devices which cannot be turned off by a control signal.

two-quadrant converter An AC/DC or DC converter with two possible directions of DC power flow associated with one direction of direct current and two directions of direct voltage or vice versa.

== U ==

uniform connection A connection with either all principal arms controllable or all principal arms non-controllable.

== V ==

valve device assembly An electrically and mechanically combined assembly of electronic valve devices or stacks, complete with all its connections and auxiliaries in its own mechanical structure.

valve device blocking An operation to prevent further turn-on of a controllable valve device or an arm consisting of such devices by inhibiting the control signals.

valve device commutation A method of self-commutation in which the commutating voltage is created by turning off the conducting electronic valve device by a control signal.

valve device quenching A method of quenching in which the quenching is performed by the electronic valve device itself.

valve device stack A single structure of one or more electronic valve devices with its (their) associated mounting(s) and auxiliaries if any.

voltage stiff AC/DC converter An electronic AC/DC converter having an essentially smooth voltage on the DC side provided e.g. by a low impedance path for the harmonic currents.

voltage source inverter voltage fed inverter A voltage stiff inverter.

== Overview of electronic power converters ==

== See also == Glossary of engineering Glossary of civil engineering Glossary of mechanical engineering Glossary of structural engineering

== Notes ==

== References ==

=== Attribution === This article incorporates text from this source, which is in the public domain: IS 1885-27: Electrotechnical vocabulary. 27. New Delhi, Bureau of Indian Standards. 2008. This article incorporates text from this source, which is in the public domain: IS 13648: Power electronics capacitors. New Delhi, Bureau of Indian Standards. 1993.

== External links ==

=== Websites === Online Electrotechnical Vocabulary A Glossary of Electrical Terms Electronic Terminology Electronics Glossary Glossary / Dictionary of Electronics Terms

=== PDFs === Pictorial Glossary Electrical Engineering Dictionary Archived 2021-04-13 at the Wayback Machine