低压电器控制技术课件：鼠笼式三相异步电动机的降压起动控制线路-

鼠笼式三相异步电动机的降压起动控制线路任务一、手动切换Y－△降压起动控制线路Y－△降压起动原理:U2V1V2W1W2U1U2V1V2W1W2U1U2V1V2W1W2U1U2V1V2W1W2（a）电动机定子绕组（b）Y形接法（c）△接法（d）△接法图5-1电动机定子绕组接线图U1

控制线路L1L2L3KM1QSFUL11L21L31L12L22L32L13L23L33FRU1V1W1M3～KM3KM2U2V2W20K1K2KM1KM1FRSB1SB21357HL1FU1KM2SB3913KM3KM2HL2KM2KM31115（a）主电路（b）控制电路图5-2手动切换Y－△降压起动控制线路安装接线L1L2L3L11L21L31QSL11L21L31L12L22L32K11FUFU1L13L23L331U1V1W13FR118U1V1W17159KM2W2U2V213K211接实验台接电动机接操作箱L12L22L3277KM1L13L23L335K2图5-3控制板接线图U2V2W21113KM3000K215任务二、时间继电器自动切换Y－△降压起动控制线路

控制线路K1K2KM1KM1FRSB1SB2135157KTFU1KM2KT913KM3KM2KM3HLKTKM211图5-5时间继电器自动切换Y－△降压起动控制电路安装接线L1L2L3L11L21L31QSL11L21L31L12L22L32K11FUFU1L13L23L331U1V1W13FRU1V1W115159KM2W2U2V213K27接实验台接电动机接操作箱L12L22L3277KM1L13L23L335K2图5-6控制板接线图U2V2W2117KM3000K213KT139915K211时间继电器自动切换Y－△降压起动控制电路图5-8时间继电器自动切换Y－△降压起动控制电路K1K2KM1KM1FRSB1SB2135157KTFU1KM2KT917KM3KM2KM3HL2KTKM213手动切换自动起动停止111921SB3SAHL1KAKAKAHL3手动自动SA图5-9时间继电器自动切换Y－△降压起动控制电路K1K2KM1KM1FRSB1SB2135157KTFU1KM2KT917KM3KM2KM3HL2KTKM213KA切换起动停止111921SB3HL1KAHL4手动自动Y—△降压起动控制

任务三、手动切换自耦变压器降压起动控制线路

控制线路UVWM3～KM3L1L2L3KM1QSFUL11L21L31L12L22L32L13L23L33FRKM2T0图5-10按钮切换自耦变压器降压起动控制电路K1K2KM3KM2FRSB1SB21357SB3FU1KM3KA915KM2KAHLKM1KM113KM1KA17KM311（a）主电路（b）控制电路L15L25L35L14L24L34安装接线L1L2L3L11L21L31QSL11L21L31L12L22L32K11FUFU1L13L23L331UVW3FRL12L22L32511KM2L14L24L34713接实验台接电动机接操作箱L12L22L32151713KM1L13L23L335K2K2图5-11控制板接线图KM3L15L25L357917000111315515915137KATL15L25L35L14L24L34L13L23L33任务四、时间继电器自动切换自耦变压器降压起动控制线路

控制线路图5-11时间继电器自动切换自耦变压器降压起动控制电路K2KAKM113KM3KM3KM2KTKAKM1HL9K1KM3FRSB1SB21357FU1KA11KTKA1715KM1安装接线L1L2L3L11L21L31QSL11L21L31L12L22L32K11FUFU1L12L22L329KM2L14L24L34K2接实验台接电动机接操作箱L13L23L335K211L12L22L32151713L13L23L331UVW3FRKM1图5-12控制板接线图KM3L15L25L3559170007K215551