一、交流接触器直流控制无声运行交流接触器是现代工业中应用最广泛的一种低压电器,工作时它的线圈内通过的是交流电流。因此,不可避免地产生交流噪声,(以每秒100次频率变化的),特别是大型交流接触器比较集中的地方噪声更大,影响工作人员健康。另一方面,交流接触器一经操作合闸后,除产生衔铁吸力外其余的电功率都以发热的形式损耗掉了,所以交流接触器运行中不仅产生 First, AC contactor DC control silent operation AC contactor is the most widely used in modern industry, a low-voltage electrical appliances, work through the coil is the AC current. As a result, ac noise is inevitably produced (at 100 frequencies per second), especially where large AC contactors are more concentrated and have a greater impact on staff health. On the other hand, once the AC contactor closing operation, in addition to armature suction generated outside the rest of the electric power is lost in the form of fever, so AC contactor operation not only produce