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41 максимальное напряжение постоянного тока
максимальное напряжение постоянного тока
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[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва]Тематики
- электротехника, основные понятия
EN
Русско-английский словарь нормативно-технической терминологии > максимальное напряжение постоянного тока
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42 виды коррекции коэффициента мощности
виды коррекции коэффициента мощности
-There are 2 types of power factor correction: fixed or automatic.
Fixed power factor correction consists of inserting, in parallel on the network, a capacitor bank whose total power is provided by the assembly of capacitors of identical or different ratings. The bank is energized by a contactor that simultaneously supplies all the capacitors (a single step).
The inrush current peak, in the case of fixed correction, can reach 30 times the nominal current of the capacitor bank.
An automatic power factor correction system, on the other hand, consists of several capacitor banks of identical or different ratings (several steps), energized separately according to the value of the power factor to be corrected.
An electronic device automatically determines the power of the steps to be energized and activates the relevant contactors.
The inrush current peak, in the case of automatic correction, depends on the power of the steps already on duty, and can reach 100 times the nominal current of the step to be energized.
[ABB]
PFC Types
There are two types of Power Factor Correction - Passive PFC and Active PFC.
Passive PFC uses passive elements like a ferrite core inductor on the AC input. It is very easy to implement in existing power circuits although the power factor is low at 60-80%. The proper AC input voltage (115V or 230V) must also be chosen manually. In addition, significant EMI can still result with a 115V AC source. Of course, a 230V AC source will not have this problem!.
Active PFC, on the other hand, uses a switching regulator with active elements like an IC, FETs (Field Effect Transistors) and diodes to create an active PFC circuit. This circuit allows the power supply to achieve a power factor of up to 95%, significantly reduce harmonics and automatically adjusts the AC input voltage. This means you do not have to manually select the AC input voltage. It works with all voltages from 110V to 240V.
[ http://www.techarp.com/showarticle.aspx?artno=81&pgno=1]
Тематики
EN
Русско-английский словарь нормативно-технической терминологии > виды коррекции коэффициента мощности
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43 импульсный ток пучка ускоренных частиц
импульсный ток пучка ускоренных частиц
Ток пучка ускоренных частиц, усредненный по длительности макроимпульса.
Примечание
В резонансных ускорителях различают макроимпульсы тока и следующие с частотой ускоряющего высокочастотного поля микроимпульсы.
[ ГОСТ Р 52103-2003]Тематики
EN
Русско-английский словарь нормативно-технической терминологии > импульсный ток пучка ускоренных частиц
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44 логические схемы с переключением тока
1. current mode logic2. current sinking logic3. current steering logicРусско-английский большой базовый словарь > логические схемы с переключением тока
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45 рабочий ток
1. телегр. mark currentток холостого хода — no-load current; open-circuit current
2. эл. operating current -
46 блуждающий ток
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47 пульсирующий ток
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48 разомкнет ток
1. break the current2. breaking the current -
49 зависимый от тока
1. current dependent2. current dependentlyток холостого хода — no-load current; open-circuit current
Русско-английский новый политехнический словарь > зависимый от тока
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50 разомкнет ток
1. break the current2. breaking the currentток холостого хода — no-load current; open-circuit current
Русско-английский словарь по информационным технологиям > разомкнет ток
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51 разомкнет ток
1. break the current2. breaking the currentРусско-английский военно-политический словарь > разомкнет ток
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52 пик тока
1) Engineering: peak current2) Electronics: current peak -
53 входной ток
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54 запомненный ток
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55 избыточный ток
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56 испытание методом несовпадающих токов
Русско-английский большой базовый словарь > испытание методом несовпадающих токов
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57 начальный ток
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58 обратный ток
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59 остаточный ток
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60 регулирующий ток
Русско-английский большой базовый словарь > регулирующий ток
См. также в других словарях:
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