广州3TB39010XM0西门子接触器供应商 3TB41010XC2

直流接触器作为应用广泛的电气开关之一，其生产和需求数量巨大，在正常使用过程中，电磁铁线圈一直通电工作，产生电磁吸力，保证铁芯和衔铁吸合，带动动、静触头闭合，接通电路。在上述过程中，线圈本身存在电阻，持续消耗电能，这是直流接触器主要的使用成本之一，浪费了大量的能源和财产，因此，如何降低直流接触器的工作耗能，是研究直流接触器的关键点和重难点。直流接触器永磁操动机构是一种在传统直流接触器电磁操动机构基础上发展而来，将电磁操动机构和永磁铁相结合的混合型操动机构，不单单使用原有的电磁吸力和弹簧反力作为铁心吸合与分离的动力，而是加入了永磁铁对铁心的吸引力，采用储能电容充放电提供合闸、分闸电力，通常称之为“电磁操动，永磁保持，电子控制”。在分、合闸运动过程中，电磁吸力，永磁吸力与弹簧作用力共同作用，在稳定工作过程中，采用永磁吸力代替之前的电磁吸力，保持衔铁与铁芯心的吸合状态。一则，永磁操动机构大量节约了保持线圈的电能消耗，环保节能。二则，永磁体保持吸合与电磁吸合相比，噪音低，无污染。三则，永磁操动机构剔除了电磁机构中一系列复杂繁琐锁扣保护装置，大大提高了接触器操动机构的工作可靠性，降低了生产工序和成本，减小了接触器的体积。 [1] 
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交流接触器利用主接点来控制电路，
用接点来导通控制回路。
主接点一般是常开接点，而接点常有两对常开接点和常闭接点，小型的接触器也经常作为中间继电器配合主电路使用。
交流接触器的接点，由银钨合金制成，具有良好的导电性和耐高温烧蚀性。
交流接触器动作的动力源于交流通过带铁芯线圈产生的磁场，电磁铁芯由两个「山」字形的幼硅钢片叠成，其中一个固定铁芯，套有线圈，工作电压可多种选择。为了使磁力稳定，铁芯的吸合面加上短路环。交流接触器在失电后，依靠弹簧复位。
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