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трансформатор при холостом ходе лабораторная работа

трансформатор при холостом ходе лабораторная работа

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трансформатор при холостом ходе лабораторная работа, Трансформатор — Википедия, Трансформатор – Уикипедия, Трансформаторы — назначение, виды и характеристики, Трансформатор: назначение, устройство, типы, принцип работы, Transformer - Wikipedia, Трансформатори ️ Изгодни Цени | Tashev-Galving, ТРАНСФОРМАТОРЫН ҮНДСЭН ОЙЛГОЛТ. - Scribd.
Наличие проводников, разделённых диэлектриком, приводит к возникновению паразитных ёмкостей между обмотками, слоями и витками. Моделирование этого явления производится введением т. н. продольных и поперечных ёмкостей. К поперечным относят межслоевую и межобмоточные ёмкости. К продольным — межвитковые и межкатушечные. Через ёмкости могут из первичной во вторичную обмотку проникать высокочастотные помехи, что нежелательно для некоторых применений трансформатора (устраняется межобмоточным заземляемым экраном). Данные эквивалентные ёмкости только в первом приближении можно считать сосредоточенными; в действительности эти величины являются распределёнными. Распределёнными являются и индуктивности рассеяния. В нормальном режиме эксплуатации напряжение равномерно распределяется по обмоткам, линейно изменяясь по виткам и слоям (для заземлённых обмоток — от фазного значения до нуля). При различных переходных процессах, связанных с резким изменением напряжения на обмотке, начинаются волновые процессы, обусловленные распределёнными ёмкостями. Особенно ярко это проявляется при грозовых и коммутационных перенапряжениях с очень крутым (порядка нескольких микросекунд для грозовых и несколько десятков микросекунд для коммутационных импульсов) передним фронтом, такие помехи имеют спектр с высокочастотными гармониками большой амплитуды. При этом распределение напряжения в начальный момент времени по обмоткам становится крайне неравномерным и большая часть напряжения падает на витках и слоях, расположенных ближе к фазным выводам, эти части обмотки подвергаются наибольшей опасности пробоя, что должно учитываться в конструкции трансформаторов (в основном силовых высоковольтных). Кроме того, наличие распределённых (продольных и поперечных) ёмкостей и индуктивностей приводит к созданию в трансформаторе паразитных колебательных контуров и при импульсах напряжения, проникающих в обмотку трансформатора, происходит высокочастотный затухающий колебательный процесс (в начальный период напряжение будет прикладываться к начальным виткам обмотки, затем распределение на обмотке меняется на противоположное и большая часть уже прикладывается к конечным виткам и т. д.). Данный эффект должен также учитываться для некоторых конструкций трансформаторов., Трансформатор осуществляет преобразование переменного напряжения и/или гальваническую развязку в самых различных областях применения — электроэнергетике, электронике и радиотехнике., При идеализиран трансформатор, индуцираното напрежение във вторичната намотка (V s) е пропорционално на напрежението в първичната намотка (V p) и на отношението на броя на навивките във .
Трансформатор, определение, общее устройство, принцип работы и основные характеристики. Виды трансформаторов и область их применения., Трансформатор — это статическое электромагнитное устройство, предназначенное для преобразования переменного тока одного напряжения в переменный ток другого напряжения., An ideal transformer is linear, lossless and perfectly coupled.Perfect coupling implies infinitely high core magnetic permeability and winding inductance and zero net magnetomotive force (i.e. i p n p − i s n s = 0). [4] [c]Ideal transformer connected with source V P on primary and load impedance Z L on secondary, where 0 < Z L < ∞. Ideal transformer and induction law [d], Разделителен трансформатор, 220 v - 220 v, 1000 a. Използва се за захранване на оперативните вериги за управление на контактори., Трансформатор нь бүтцийн хувьд энгийн хийцтэй. Жишээ болгож 1 фазын трансформаторын бүтэц, ажиллах зарчмыг үзье., Трансформатор нь түүн рүү орж буй талын ороомогт ирэх хувьсах хүчдэлийг, гаргалтын хоёр дахь ороомгоор гаралтын хувьсах хүчдэл болгон хувиргах төхөөрөмж юм. Ингэж хувирахдаа оролт болон .
 
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