文档介绍：关于电机,继电器和接触器的分析与学****摘要: 电动机也称为“马达”, 把电能转变为机械能的机器。利用电动机可以把发电机所产生的大量电能, 应用到生产事业中去。构造和发电机基本上一样, 原理却正好相反, 电动机是通电于转子线圈以引起运动, 而发电机则是借转子在磁场中之运动产生电流。为了获得强大的磁场起见, 不论电动机还是发电机, 都以使用电磁铁为宜。电动机因输入的电流不同, 可分为直流电动机与交流电动机:( 1 )直流电动机——用直流电流来转动的电动机叫直流电动机。因磁场电路与电枢电路连结之方式不同,又可分为串激电动机、分激电动机、复激电动机; (2 )交流电动机——用交流电流来转动的电动机叫交流电动机。继电器是一种当输入量(电、磁、声、光、热) 达到一定值时, 输出量将发生跳跃式变化的自动控制器件。交流接触器广泛用作电力的开断和控制电路。交流接触器利用主接点来开闭电路,用辅助接点来执行控制指令。主接点一般只有常开接点, 而辅助接点常有两对具有常开和常闭功能的接点, 小型的接触器也经常作为中间继电器配合主电路使用。关键字:电动机, 继电器, 交流接触器 ABSTRACT: Motor is also known as "motor" and electricity into mechanical energy machines. The use of motor generator which can produce a lot of energy, applied to production to the cause. Construction and generators basically the same, the principle has been just the opposite, motor rotor is electrifying in the coil to cause movement, while generator rotor is through the ic field generated which isa current campaign. In order to obtain the sake ofa strong ic field, regardless of motor or generator, it is advisable to use the . Motor due to the importation of the different currents, can be divided into DC motor with AC motor : (1) DC motor -- DC current to the motor rotation called DC motor. Because ic circuit with the armature circuit connecting different manner, can be divided into Cascade motor, motor-stimulated, Minute Motor; (2) AC motor -- AC current to the motor rotation called AC motor. When the re