Ushbu maqolada asinxron motor reaktiv quvvatini nazorat qilish va boshqarish uchun tok o‘zgartkichidan foydalanildi. Tok o‘zgartkich asinxron motor stator pazlari va asosiy chulg‘am pona orasiga joylashtirildi. Bu esa asinxron motor stator chulg‘amida hosil bo‘luvchi asosiy va sochiluvchan magnit oqimlar hisobiga kuchlanish ko‘rinishida signal chiqaradi. Turli xususiyatli miqdorlarning o‘zaro ta’sirini hisobga olgan holda, o‘lchov chulg‘amidan olinayotgan signalning dinamik xususiyatlarini o‘rganish o‘zgartkichning birlamchi va ikkilamchi signal o‘zgartirish bo‘laklari, signal uzatish elementlari hamda o‘tish jarayonlarini tavsiflovchi differensial tenglamalarni shakllantirishda yuzaga keladigan qiyinchiliklar tufayli tadqiqotlarning ilg‘or matematik apparati – graf modeli va uning analitik ifodalari asosida olib boriladi. Tok o‘zgartkichning asosiy elementi o‘lchov chulg‘ami, ya’ni sezgir element hisoblanadi. O‘lchov sezgir elementi asinxron motor stator pazlari sonidan kelib chiqib, ikki yoki uch halqali qilib joylashtiriladi. Mustaqil o‘lchov chulg‘amiga nisbatan o‘lchashning aniqligi, ishonchliligi, sezgirligi ortadi. O‘lchov sezgir element halqalari mustaqil yoki ketma-ket ulanadi. Ketma-ket ulanganda, chiqish kuchlanishining miqdori ikki marta oshadi. Mustaqil va ketma-ket ulaganimizda, asinxron motor birlamchi stator tokiga ta’sirining dinamik tavsiflar yordamida tadqiqoti olindi.
Ushbu maqolada asinxron motor reaktiv quvvatini nazorat qilish va boshqarish uchun tok o‘zgartkichidan foydalanildi. Tok o‘zgartkich asinxron motor stator pazlari va asosiy chulg‘am pona orasiga joylashtirildi. Bu esa asinxron motor stator chulg‘amida hosil bo‘luvchi asosiy va sochiluvchan magnit oqimlar hisobiga kuchlanish ko‘rinishida signal chiqaradi. Turli xususiyatli miqdorlarning o‘zaro ta’sirini hisobga olgan holda, o‘lchov chulg‘amidan olinayotgan signalning dinamik xususiyatlarini o‘rganish o‘zgartkichning birlamchi va ikkilamchi signal o‘zgartirish bo‘laklari, signal uzatish elementlari hamda o‘tish jarayonlarini tavsiflovchi differensial tenglamalarni shakllantirishda yuzaga keladigan qiyinchiliklar tufayli tadqiqotlarning ilg‘or matematik apparati – graf modeli va uning analitik ifodalari asosida olib boriladi. Tok o‘zgartkichning asosiy elementi o‘lchov chulg‘ami, ya’ni sezgir element hisoblanadi. O‘lchov sezgir elementi asinxron motor stator pazlari sonidan kelib chiqib, ikki yoki uch halqali qilib joylashtiriladi. Mustaqil o‘lchov chulg‘amiga nisbatan o‘lchashning aniqligi, ishonchliligi, sezgirligi ortadi. O‘lchov sezgir element halqalari mustaqil yoki ketma-ket ulanadi. Ketma-ket ulanganda, chiqish kuchlanishining miqdori ikki marta oshadi. Mustaqil va ketma-ket ulaganimizda, asinxron motor birlamchi stator tokiga ta’sirining dinamik tavsiflar yordamida tadqiqoti olindi.
В данной статье описано использование преобразователя тока для контроля и управления реактивной мощностью асинхронного двигателя. Трансформатор тока размещен между обмотками статора асинхронного двигателя и основной обмоткой. В результате возникает сигнал в виде напряжения из-за основного и блуждающего магнитных токов, генерируемых в обмотке статора асинхронного двигателя. Исследование динамических свойств сигнала, принимаемого от измерительного прибора, с учетом взаимодействия различных специфических величин, дифференциальных уравнений, описывающих переходные процессы в первичных и вторичных секциях изменения сигнала преобразователя, элементах передачи сигнала и за счет трудности в формировании, проводится на основе развитого математического аппарата – графовой модели и ее аналитических выражений. Основным элементом трансформатора тока является измерительная катушка, т. е. чувствительный элемент. В зависимости от количества пазов статора асинхронного двигателя измерительный чувствительный элемент выполнен в виде двух- или трехкольцевого. Точность измерения, надежность и чувствительность повышаются по сравнению с независимым измерительным устройством. Кольца датчиков подключаются независимо или последовательно. При последовательном соединении измерительных контуров величина выходного напряжения удваивается. Влияние асинхронного двигателя на первичный ток статора при независимом и последовательном соединении колец измерительного элемента получено с помощью динамических описаний.
This paper describes the use of a current transformer to monitor and control the reactive power of an induction motor. The current transformer is placed between the induction motor stator windings and the main winding. The result is a voltage signal due to the main and stray magnetic currents generated in the induction motor stator winding. The study of dynamic properties of the signal received from the measuring instrument, taking into account the interaction of various specific quantities, differential equations describing the transient processes in the primary and secondary sections of the transformer signal change, signal transmission elements and due to the difficulty in formation, is conducted on the basis of the developed mathematical apparatus - the graph model and its analytical expressions. The main element of the current transformer is the measuring coil, i.e. sensitive element. Depending on the number of slots of the induction motor stator the sensing element is made in the form of two- or three-ring. The measuring accuracy, reliability and sensitivity are increased compared to an independent measuring device. The sensor rings are connected independently or in series. When measuring circuits are connected in series, the output voltage value doubles. Influence of asynchronous motor on primary stator current at independent and series connection of gauge rings is obtained by means of dynamic descriptions.
| № | Муаллифнинг исми | Лавозими | Ташкилот номи |
|---|---|---|---|
| 1 | BOIXANOV Z.U. | texnika fanlari boʻyicha falsafa doktori (PhD) | Andijon mashinasozlik instituti |
| № | Ҳавола номи |
|---|---|
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