6.7 KiB
| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Glossary of power electronics | 5/6 | https://en.wikipedia.org/wiki/Glossary_of_power_electronics | reference | science, encyclopedia | 2026-05-05T07:51:12.696950+00:00 | kb-cron |
operating temperature (capacitor) The temperature of the hottest point on the case of the capacitor in thermal equilibrium.
overpressure disconnector A disconnecting device designed to interrupt the current path in the case of abnormal increase of the internal pressure.
== P ==
pair of antiparallel arms Two valve arms in parallel with opposite conducting directions.
pair of arms Two series connected valve arms with the same conducting direction.
parallel operation A mode of operation of stabilized power supplies in which all similar output terminals are connected together and arranged so that the total load is shared by all the supplies.
phase control factor In the case of phase control, the ratio of the voltage at prevailing current delay angle to the voltage at zero current delay angle, all voltage drops being assumed to be zero.
phase converter An AC converter for changing the number of phases.
phase control The process of varying the instant within the cycle at which current conduction in an electronic valve device or a valve arm begins.
power electronic capacitor A power capacitor intended to be used in power electronic equipment and capable of operating continuously under non-sinusoidal current or voltage.
power electronics The field of electronics which deals with the conversion or switching of electric power with or without control of that power.
principal arm A valve arm involved in the major transfer of power from one side of the converter or electronic switch to the other.
pulse control The process of varying the starting or termination instants or both of a repeated current conduction in a principal arm.
pulse control factor The conduction ratio of a principal arm in the case of pulse duration control, assuming the commutation inductance to be zero.
pulse frequency (fp) (capacitor) The repetition rate of periodic current pulses.
pulse frequency control Pulse control at variable frequency and fixed pulse duration.
pulse frequency control Pulse control at variable frequency and fixed pulse duration.
pulse number The number of non-simultaneous symmetrical direct or indirect commutations from one principal arm to another which occur during one elementary period.
pulse width modulation control PWM control (abbreviation) Pulse control in which the pulse width or frequency or both are modulated within each fundamental period to produce a certain output waveform.
== Q ==
quenching The termination of current flow in an arm without commutation.
quenching voltage The voltage which causes quenching of the current.
== R ==
reactive power converter A converter for reactive power compensation that generates or consumes reactive power without the flow of active power except for the power losses in the converter.
rated AC voltage (Un) (capacitor) The maximum operating peak recurrent voltage of either polarity of a reversing type waveform for which the capacitor has been designed.
rated DC voltage (Un) (capacitor) The maximum operating peak voltage of either polarity but of a non-reversing type wave form, for which the capacitor has been designed, for continuous operation.
real no-load direct voltage The actual mean direct voltage at zero direct current.
(electronic) (power) rectification Electronic conversion from AC to DC
rectification factor For rectification, the ratio of the DC power to the fundamental input power.
rectifier An AC/DC converter for rectification.
regenerative arm A valve arm which transfers a part of the power from the load side to the source side.
(electronic) (power) resistance control Control using the continuous variation of the resistance of electronic devices.
resistive direct voltage regulation The direct voltage regulation due to resistance (threshold voltages of electronic valve devices excluded).
resonant converter A converter using (a) resonant circuit(s) to provide commutation or to reduce switching losses.
resonant frequency (fr) (capacitor) The lowest frequency at which the impedance of the capacitor becomes minimum.
reversible converter A converter in which the direction of the power flow is reversible.
reverse blocking state the non-conducting state of a reverse blocking valve device or an arm consisting of such devices when reverse voltage is applied between its main terminals (electrodes).
reverse blocking valve device A valve device which is capable of blocking a specified direct voltage applied in its non-conducting direction.
reverse breakdown A failure that permanently deprives a reverse blocking valve device or an arm consisting of such devices of its property to block reverse voltage.
ripple voltage (on the DC side) The peak-to-peak alternating voltage component of the voltage on the DC side of a converter.
== S ==
slave operation A mode of operation of stabilized power supplies achieving coordinated control of interconnected stabilized supplies by setting the master supply alone.
self-commutation A commutation where the commutating voltage is supplied by components within the converter or the electronic switch.
self-healing metallized dielectric capacitor A capacitor, the electrodes of which are deposited on the dielectric (usually by evaporation); in the event of breakdown of the dielectric, the capacitor restores itself.
semiconductor converter An power converter with semiconductor valve devices.
semiconductor switch An electronic power switch with semiconductor valve devices.
semiconductor valve device An electronic valve device which is a semiconductor device.
sequential phase control Asymmetrical phase control such that the delay angles are determined according to a given sequence.
single converter A current stiff reversible AC/DC converter with direct current in one direction.
single-way connection (of a converter) A converter connection such that the current through each of the phase terminals of the AC circuit is unidirectional.
snubber (circuit) A subcircuit connected to one or more electronic valve devices in order to relieve it (them) of stress as for instance overvoltage transients, switching losses, high rate of rise of current or voltage, etc.
stabilized current characteristic A characteristic with a stabilized output current.
stabilized output characteristic A forced characteristic with an output quantity which is stabilized with respect to changes of influence quantities.
stabilized voltage characteristic A characteristic with a stabilized output voltage.
stabilization In the field of power electronics the reduction of the effect of changes of influence quantities on the output quantity.