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21 coding
1) кодированиеа) представление информации в виде последовательности элементов некоторой совокупности символов или сигналов по определённой системе правилб) вчт. программирование2) модуляция (напр. в системе с дельта-модуляцией)•- adaptive coding
- adaptive transform acoustic coding
- alphabetic coding
- alpha-geometric coding
- alpha-photographic coding
- alternate mark inversion coding
- AMI coding
- angle coding
- angular coding
- antinoise coding
- automatic coding
- binary coding
- bipolar coding
- bit-by-bit coding
- biternary coding
- blink rate coding
- block coding
- block-to-block coding
- channel coding
- color coding
- component coding
- composite coding
- conditional replenishment coding
- contour coding
- convolution coding
- convolutional coding
- depth coding
- deviations from means coding
- digital coding
- direct-feedback coding
- display coding
- double-frequency coding
- duobinary coding
- eight-to-fourteen modulation coding
- entropy coding
- fractal block coding
- fractal coding
- fuzzy coding
- gap coding
- grid coding
- Hadamard transform image coding
- hash coding
- image coding
- image sequence coding
- interfield coding
- interframe coding
- interleaved coding
- intraframe coding
- linear coding
- luminance coding
- MIDI coding
- minimum-access coding
- modular coding
- multilevel coding
- numeric coding
- parametric coding
- partial-response coding
- picture coding
- plateau coding
- precision adaptive subband coding
- predictive coding
- program coding
- progressive coding
- pulse-width coding
- relative coding
- reply coding
- robust coding
- run-length coding
- run-length limited coding
- sequential coding
- serial coding
- shape coding
- size coding
- slant transform coding
- source coding
- space-time coding
- specific coding
- structured coding
- subsampling coding
- symbolic coding
- symbology coding
- transformation coding
- transition coding
- two-dimensional transform coding
- variable-length coding
- video coding
- Walsh coding
- waveform coding
- Weston coding
- width codingThe New English-Russian Dictionary of Radio-electronics > coding
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22 sweep
развертка
– azimuth sweep
– circular sweep
– delayed sweep
– driven sweep
– elevation sweep
– expanded sweep
– exponential sweep
– field sweep
– free-running sweep
– horizontal sweep
– range sweep
– retrace sweep
– rope sweep
– sweep beam
– sweep circuit
– sweep current
– sweep deck
– sweep duration
– sweep exapnder
– sweep expansion
– sweep generator
– sweep magnifier
– sweep method
– sweep motion
– sweep of lathe
– sweep of the wood
– sweep oscillator
– sweep template
– sweep trace
– sweep voltage
– variable sweep
– vertical sweep
– wing sweep
linear sweep generator — <phot.> генератор линейного напряжения развертки
range sweep generator — <tech.> генератор развертки дальности
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23 VPW
1) Спорт: Virtual Pro Wrestling2) Техника: vertically polarized wave3) Автомобильный термин: variable pulse width4) Транспорт: V-8 Power Wagon5) Фирменный знак: Video Placement Worldwide6) СМИ: Virginia Press Women7) Программное обеспечение: Visual Programmer's WorkBench -
24 VPWM
Автомобильный термин: variable pulse width modulated -
25 primary switch mode power supply
- импульсный источник электропитания с коммутацией тока на первичной стороне
импульсный источник электропитания с коммутацией тока на первичной стороне
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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
Англо-русский словарь нормативно-технической терминологии > primary switch mode power supply
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