Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following Londonfl jerseys supplyn Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of swomen nfl jerseystaying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yecheap nfl jerseys wholesales," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won http://govoriotkrito.bg/libs/nflcn08.htmthe globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.cheap nfl jerseys
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磁保持继电器

2014/11/10 9:04:20点击:
磁保持继电器是近几年发展起来的一种新型继电器,也是一种自动开关。和其他电磁继电器一样,对电路起着自动接通和切断作用。所不同的是,磁保持继电器的常闭或常开状态完全是依赖永久磁钢的作用,其开关状态的转换是靠一定宽度的脉冲电信号触发而完成的。
当继电器的触点需要置位时,只需要用正直流脉冲电压激励线圈J2,线圈J2励磁后产生的磁极与永磁铁的磁极相互作用,同极性相互吸引,异极性相互排斥,使得继电器在瞬间就完成了复位到置位的状态转换。磁保持继电器由置位状态转换为复位状态的过程同理。
磁保持继电器分为单相和三相。据有关资料介绍,目前市场上的磁保持继电器的触点转换电流最大可达150A;控制线圈电压分为DC9V、DC12V等。一般电器寿命10000次;机械寿命1000000次;触点接触压降<100mV。因此,具有省电、性能稳定、体积小、承载能力大,比一般电磁继电器性能优越的特点。