Описание работы типовых релейно-контакторных электрических схем управления электроприводами, страница 19

                    a)                                                                              б)                                                                                                                                                                                                                        SB2

         +    SB1                                                                   KM1  -                                                                                         KM2.2                                                                                                                                                                                                                                                                                                                                   KM1.1                                                                                                                                                                                                                                                                                                                                                                 SB3                                                                                                                                                                   KM2                                                                                             KM1.2                                                                                                                                                                                                         KM2.1                                                                                                                                                                                                                                                                                         

          Рисунок 7.23 – Управления двигателем постоянного тока:

                                  а) главные цепи безреостатного пуска и реверсирова-
                                      ния маломощного двигателя с последовательным
                                      возбуждением;
                                  б) главные цепи безреостатного пуска и реверсирова-
                                       вания маломощного двигателя в двумя секциями
                                       последовательной обмотки возбуждения;

                                    в) схема управления главными цепями по варианту
                                         а и б

          +                                                                                                             -                                       КМ1                      LM                        KM1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            ОЯ                                                                                                                                                   R3                   R2                   R1     KM1                                                                                                                                                                                                                                                                                                                                                                                                                                           KV3                       KV3             KV2                KV1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                KV2                                                                                                                                                                                                                                                                                                                                                                                                              KV1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             SB1             SB2                                                                                                                                                                               KM1                                                                                                                                                                                                                                                                                                                                                KM1.1