Классификация электрических информационных микромашин автоматических устройств. Тахогенераторы. Классификация электромеханических реле. Сельсины. Дистанционные передачи на базе сельсинов. Поворотные трансформаторы, страница 4

 - щеточно-коллекторный контакт

 - постоянная машины

Погрешности:

1 падение напряжения на щеточном контакте, за счет этого появляется зона нечувствительности, следовательно уменьшения диапазона измерения.

Меры борьбы: уменьшение R_пер(проволочные щетки)

2 влияние реакции якоря, появляется в искажении выходной характеристики. Из-за размагничивающего действия реакции якоря магнитный поток с увеличением n уменьшается, что приводит к уменьшению крутизны выходной характеристики.

3 температурная погрешность, методы борьбы аналогичны

4 асимметрия U_вых. Причины: неточная установка щеток на геометрической нейтрали машины изначально; Смещение щеток в процессе работы.

Достоинства: 1 малая масса 2 малые габариты 3 большая выходная мощность 4 возможность работы без внешнего источника питания, за счет магнита

Недостатки: 1 щеточно-коллекторный узла 2 наличие пульсаций U_вых 3 пониженная надежность.

5.  Классификация электромеханических реле.

Р        Е        Л       Е

И З М Е Р И-      Т Е Л Ь Н Ы Е

МАКСИМАЛЬНЫЕ МИНИМАЛЬНЫЕ

АКУСТИЧЕСКИЕ

ОПТИЧЕСКИЕ

ТЕПЛОВЫЕ

МЕХАНИЧЕСКИЕ

ЭЛЕКТРИЧЕСКИЕ

ПЕРВИЧНЫЕ  ВТОРИЧНЫЕ   ШУНТОВЫЕ

ПОСТОЯННОГО            ТОКА     ПЕРЕМЕННОГО            ТОКА УНИВЕРСАЛЬНЫЕ

ЗАВИСИМОЙ НЕЗАВИСИМОЙ ОГРАНИЧЕННО-   ЗАВИСИМОЙ

БЕЗ МАГНИТО-       ПРОВОДА ФЕРРОДИНАМИ         ЧЕСКИЕ

НЕПОЛЯРИЗО      ВАННЫЕ     ПОЛЯРИЗО       ВАННЫЕ

БЕЗ   ГЕРКОНОВ ГЕРКОНОВЫЕ

СТАТИЧЕСКИЕ    ЭЛЕКТРОМЕХА       НИЧЕСКИЕ

ЭЛ.МАГНИТНЫЕ МАГНИТОЭЛЕКТРИЧ.     ЭЛЕКТРОДИНАМИ             ЧЕСКИЕ     ИНДУКЦИОННЫЕ ЭЛЕКТРОТЕПЛОВЫЕ

С ВЫДЕРЖКОЙ             ВРЕМЕНИ С НЕНОРМИРУЕМЫМ           ВРЕМЕНЕМ

ТОКА    НАПРЯЖЕНИЯ      АКТИВНОЙ                                 МОЩНОСТИ    РЕАКТИВНОЙ     МОЩНОСТИ        ПОЛНОГО СОПРОТИВЛЕНИЯ        ЧАСТОТЫ

ПРОМЕЖУТОЧНЫЕ      УКАЗАТЕЛЬНЫЕ

С  НЕНОРМИРУЕМЫМ          ВРЕМЕНЕМ       РЕЛЕ  ВРЕМЕНИ

ЛОГИЧЕСКИЕ

ОДНОСТАБИЛЬНЫЕ ДВУХСТАБИЛЬНЫЕ

ПОЛЯРИЗОВАННЫЕ     НЕЙТРАЛЬНЫЕ

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                                                       7                                                                                                                                              5                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 3                                                4                                                                                                                                                                                                                                  6                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               11                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           11                   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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           9                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1 – в зависимости от физической природы управляющего сигнала: 2 – от рода тока: 3 – от способа включения в электрическую цепь: 4 – от выполняемых функций: