-
1 буферный резистор
буферный резистор
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]Тематики
- электротехника, основные понятия
EN
Русско-английский словарь нормативно-технической терминологии > буферный резистор
-
2 буферный резистор
Engineering: buffer resistor -
3 opornik
m 1. Elektr. resistor- opornik drutowy/warstwowy a wire-wound/a film resistor2. Wojsk. (mechaniczny) recoil spring; (hydrauliczny) recoil cylinder* * *ELEKTR resistor* * *miGen. -a1. el. resistor.2. wojsk. buffer, recoil brake.The New English-Polish, Polish-English Kościuszko foundation dictionary > opornik
-
4 импульсный источник электропитания с коммутацией тока на первичной стороне
импульсный источник электропитания с коммутацией тока на первичной стороне
-
In primary switch mode power supplies, the AC mains voltage is first rectified and smoothed and then chopped ("switched"). Chopping means that the DC voltage is switched periodically at a frequency of 40 to 200 kHz using a power transistor.
In contrast to linearly regulated power supplies, the power transistor does not act as a variable resistor but as a switch instead. This generates a square-wave AC voltage that is transformed to the secondary circuit using a high-frequency transformer. In the secondary circuit, the voltage is rectifi ed and smoothed. The quantity of energy transformed to the secondary circuit is controlled, depending on the load, by varying the chopping rate. The longer the transistor is conductive, the higher is the quantity of energy transformed to the secondary circuit ( pulse width modulation).
Due to the use of high-frequency AC voltage, primary switch mode power supplies have the decisive advantage that their transformer can be of much smaller size than required for the transformation of low frequencies. This reduces the weight and the dissipation inside the unit. The effi ciency of these units is between 85 and 95 %. Since the output voltage does not directly depend on the input voltage, these units can be used for a wide input voltage range and can even be supplied with DC voltage. Furthermore, it is possible to buffer short-time mains voltage breakdowns up to 200 ms. However, the power failure buffering time is limited by the size of capacitor C1 since a longer buffering time requires a higher capacity and thus a bigger size of the capacitor. Especially in case of small power supplies this is not desirable.
Therefore, a practicable compromise has to be made between the size of the power supply and the buffering time.
Primary switch mode power supplies can be used for all purposes. For example, they are suitable for the supply of all kind of electronics as well as for electromechanical applications.
[ABB]Тематики
EN
Русско-английский словарь нормативно-технической терминологии > импульсный источник электропитания с коммутацией тока на первичной стороне
См. также в других словарях:
Buffer amplifier — A buffer amplifier (sometimes simply called a buffer) is one that provides electrical impedance transformation from one circuit to another. Two main types of buffer exist: the voltage buffer and the current buffer. Figure 1: Top: Ideal voltage… … Wikipedia
Pull-up resistor — Pull up resistors are used in electronic logic circuits to ensure that inputs to logic systems settle at expected logic levels if external devices are disconnected. Pull up resistors may also be used at the interface between two different types… … Wikipedia
буферный резистор — — [Я.Н.Лугинский, М.С.Фези Жилинская, Ю.С.Кабиров. Англо русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.] Тематики электротехника, основные понятия EN buffer resistor … Справочник технического переводчика
Operational amplifier applications — This article illustrates some typical applications of operational amplifiers. A simplified schematic notation is used, and the reader is reminded that many details such as device selection and power supply connections are not shown. Contents 1… … Wikipedia
Common base — Figure 1: Basic NPN common base circuit (neglecting biasing details). In electronics, a common base (also known as grounded base) amplifier is one of three basic single stage bipolar junction transistor (BJT) amplifier topologies, typically used… … Wikipedia
Symbole electronique — Symbole électronique Les symboles électroniques sont largement utilisés pour représenter les composants des circuits électroniques. Cet article a pour vocation de tous les représenter et de faire office de liste ou « dictionnaire ».… … Wikipédia en Français
Symbole électronique — Les symboles électroniques sont largement utilisés pour représenter les composants des circuits électroniques. Cet article a pour vocation de tous les représenter et de faire office de liste ou « dictionnaire ». Sommaire 1 … Wikipédia en Français
Symboles électroniques — Symbole électronique Les symboles électroniques sont largement utilisés pour représenter les composants des circuits électroniques. Cet article a pour vocation de tous les représenter et de faire office de liste ou « dictionnaire ».… … Wikipédia en Français
Valve audio amplifier - technical — Circuitry and performance Characteristics of valves Valves are very high input impedance (near infinite in most circuits) and high output impedance devices. They are also high voltage / low current devices.While valves themselves are described… … Wikipedia
Sallen–Key filter — A Sallen–Key filter is a type of active filter, particularly valued for its simplicity. The circuit produces a 2 pole (12 dB/octave) lowpass or highpass response using two resistors, two capacitors and (usually) a unity gain buffer amplifier.… … Wikipedia
Schmitt trigger — In electronics, a Schmitt trigger is a comparator circuit that incorporates positive feedback.When the input is higher than a certain chosen threshold, the output is high; when the input is below another (lower) chosen threshold, the output is… … Wikipedia
