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composite characteristic | Physics | 1 | A characteristic consisting of parts of the stabilized voltage and stabilized current characteristics. |
conducting direction | Physics | 1 | The direction in which an electronic valve device or a valve arm is capable of conducting current. |
conduction interval | Physics | 1 | That part of an elementary period in which the valve arm conducts. |
conduction ratio | Physics | 1 | The ratio of the conduction interval to the sum of the conduction interval and the idle interval. |
conduction through | Physics | 1 | 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. |
(power) conversion | Physics | 1 | 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. |
(power) converter | Physics | 1 | 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 | Physics | 1 | 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 | Physics | 1 | 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 | Physics | 1 | A valve device the current path of which is bistably controlled in its conducting direction. |
constant current power supply | Physics | 1 | A power supply that stabilizes output current with respect to changes of influence quantities. |
constant voltage power supply | Physics | 1 | A power supply that stabilizes output voltage with respect to changes of influence quantities. |
constant voltage or constant current power supply | Physics | 1 | 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 | Physics | 1 | 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 | Physics | 1 | A flow of direct current which is not periodically interrupted. |
conversion factor | Physics | 1 | The ratio of the fundamental output power or DC output power to the fundamental input power or DC input power. |
container temperature rise | Physics | 1 | 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 | Physics | 1 | 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 | Physics | 1 | 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 | Physics | 1 | 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 | Physics | 1 | 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. |
θamb | Physics | 1 | 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 | Physics | 1 | 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 | Physics | 1 | 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 | Physics | 1 | The time expressed in angular measure by which the starting instant of current conduction is delayed by phase control. |
current pulse width | Physics | 1 | The time of current flow during the charging or discharging from one voltage value to another of the capacitor. |
τ | Physics | 1 | The time of current flow during the charging or discharging from one voltage value to another of the capacitor. |
current source inverter | Physics | 1 | A current stiff inverter. |
current fed inverter | Physics | 1 | A current stiff inverter. |
current stiff ac/dc converter | Physics | 1 | 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 | Physics | 1 | A direct frequency converter. |
dc capacitor | Physics | 1 | A capacitor essentially designed for operation with direct voltage. |
dc converter | Physics | 1 | A converter for DC conversion. |
dc conversion factor | Physics | 1 | for DC conversion, the ratio of the DC power value on the load side to that on the source side. |
dc (power) conversion | Physics | 1 | Electronic conversion from DC to DC |
dc filter | Physics | 1 | A filter on the DC side of a converter, designed to reduce the ripple in the associated system. |
dc form factor | Physics | 1 | The ratio of the rms value to the mean value averaged over a full period of a periodically varying quantity having a non zero DC component. |
dc power | Physics | 1 | The product of the direct voltage and the direct current (mean values). |
dc ripple factor | Physics | 1 | The ratio of half the difference between the maximum and minimum value of a pulsating direct current to the mean, value of this current. |
direct ac/dc converter | Physics | 1 | An electronic AC/DC converter without a DC or AC link. |
direct ac converter | Physics | 1 | An AC converter without a DC link. |
direct (power) conversion | Physics | 1 | Electronic conversion without a DC or AC link. |
direct dc converter | Physics | 1 | A DC converter without an AC link. |
dc chopper | Physics | 1 | A DC converter without an AC link. |
direct commutation | Physics | 1 | A commutation between two principal arms without transfer through any auxiliary arms. |
direct inverter | Physics | 1 | An inverter without a DC link. |
direct rectifier | Physics | 1 | A rectifier without a DC or AC link. |
direct voltage regulation | Physics | 1 | The difference between the conventional no-load direct voltage and the direct voltage at load at the same trigger delay angle excluding the correcting effect of stabilizing means if any. |
double converter | Physics | 1 | A current stiff reversible AC/DC converter with direct current in both directions. |
double-way connection | Physics | 1 | A converter connection such that the current through each of the phase terminals of the AC circuit is bidirectional. |
duty cycle | Physics | 1 | 1. continuous duty; Operation time such that a capacitor is at thermal equilibrium for most of the time. |
electronic ac (power) switch | Physics | 1 | An electronic power switch capable of switching alternating current. |
electronic ac power controller | Physics | 1 | A unit which is able to operate as a controllable direct AC voltage converter as well as an electronic AC switch. |
electronic dc (power) switch | Physics | 1 | An electronic power switch capable of switching direct current. |
electronic device | Physics | 1 | A device the function of which is based on charge carriers moving through a semiconductor, a high vacuum or a gas discharge. |
elementary frequency | Physics | 1 | The reciprocal of the elementary period. |
elementary period | Physics | 1 | The duration of one cycle of the phenomena that are periodically repeated. |
electronic power filter | Physics | 1 | A converter for filtering. |
active power filter | Physics | 1 | A converter for filtering. |
electronic (power) switching | Physics | 1 | Switching an electric power circuit by means of electronic valve devices. |
electronic (power) switch | Physics | 1 | An operative unit for electronic power switching comprising at least one controllable valve device. |
electronic valve device | Physics | 1 | An indivisible electronic device for electronic power conversion or electronic power switching, comprising a single non-controllable or bistably controlled unidirectionally conducting current path. |
equivalent series resistance of a capacitor | Physics | 1 | An effective resistance which, if connected in series with an ideal capacitor of capacitance value equal to that of the capacitor in question, would have a power loss equal to the active power dissipated in that capacitor underspecified operating conditions. |
external commutation | Physics | 1 | A commutation where the commutating voltage is supplied by a source outside the converter or electronic switch. |
external quenching | Physics | 1 | A method of quenching in which the quenching results from causes external to the electronic valve device. |
false firing | Physics | 1 | The firing of a latching valve device or an arm consisting of such devices at an incorrect instant. |
flyback converter | Physics | 1 | A DC converter where the energy is transferred from the source side to the load side during the idle interval(s) of the controllable principal arm(s) after being stored in an inductance. |
firing | Physics | 1 | The establishment of current in the conducting direction in a latching valve device or an arm consisting of such devices. |
firing failure | Physics | 1 | A failure to achieve conduction in a latching valve device or an arm consisting of such devices during the conduction interval. |
forward breakdown | Physics | 1 | A failure that permanently deprives a controllable valve device or an arm consisting of such devices of its property to block forward voltage. |
forward converter | Physics | 1 | A DC converter where the energy is transferred from the source side to the load side during the conduction interval(s) of the controllable principal arm(s). |
four-quadrant converter | Physics | 1 | An AC/DC or DC converter with two directions of DC power flow, associated with two directions of direct voltage and two directions of direct current. |
free-wheeling arm | Physics | 1 | A by-pass arm containing only non-controllable valve devices. |
frequency converter | Physics | 1 | An AC converter for changing the frequency. |
forced characteristic | Physics | 1 | A characteristic obtained by additional means, e.g. stabilization, with specified variation limits of influence quantities. |
fully controllable connection | Physics | 1 | A uniform connection with all principal arms controllable. |
fundamental factor | Physics | 1 | The ratio of the rms value of the fundamental component to the rms value of the alternating quantity. |
fundamental power | Physics | 1 | The active power determined by the fundamental components of voltage and current. |
half-controllable connection | Physics | 1 | A non-uniform connection with half the number of principal arms controllable. |
harmonic content | Physics | 1 | The quantity obtained by subtracting from an alternating quantity its fundamental component. |
(total) harmonic factor | Physics | 1 | The ratio of the rms value of the harmonic content of an alternating quantity to the r.m.s. value of the quantity. |
high vacuum valve device | Physics | 1 | An electronic valve device in which the degree of vacuum is so high that the effects of ionization are negligible. |
hold-off interval | Physics | 1 | The interval between the instant when the on-state current of a latching valve device has decreased to zero and the instant when the same valve device is subjected to reapplied off-state voltage. |
indirect ac converter | Physics | 1 | An AC converter with a DC link. |
indirect ac/dc converter | Physics | 1 | An electronic AC/DC converter with a DC or AC link. |
indirect commutation | Physics | 1 | A series of commutations from one principal arm to another or back to the original one by successive commutations via one or more auxiliary arms. |
indirect (power) conversion | Physics | 1 | Electronic conversion with one or more DC or AC link(s). |
indirect current link ac converter | Physics | 1 | An AC converter with a current stiff DC link . |
indirect dc converter | Physics | 1 | A DC converter with an AC link. |
indirect inverter | Physics | 1 | An inverter with a DC link. |
indirect rectifier | Physics | 1 | A rectifier with a DC or AC link. |
indirect voltage link ac converter | Physics | 1 | An AC converter with a voltage stiff DC link. |
inductive direct voltage regulation | Physics | 1 | The direct voltage regulation due to the commutation inductance(s). |
influence quantity | Physics | 1 | In the field of power electronics any quantity generally external to a power supply which may affect its performance. |
inherent delay angle | Physics | 1 | The current delay angle occurring, even without phase control, caused by multiple overlap. |
inherent direct voltage regulation | Physics | 1 | The direct voltage regulation excluding the effect of the AC system impedance. |
intermittent flow | Physics | 1 | A flow of direct current which is periodically interrupted. |
internal discharge device | Physics | 1 | A device incorporated in the capacitor connecting the terminals of the unit, capable of reducing the residual voltage effectively to zero after the capacitor has been disconnected from the supply. |
internal (element) fuse | Physics | 1 | A device incorporated in the capacitor which disconnects an element or a group of elements in the event of breakdown. |
insulation voltage | Physics | 1 | The RMS rated value of the insulation voltage of capacitive elements and terminals to case or earth. If not specified, the RMS value of the insulating voltage is equivalent to the rated voltage divided by a square root of 2. |
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