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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继电器在电压不足的情况下工作分析解决

2013/11/8 13:34:15点击:
      一旦加到线圈上的电压不足,继电器会不工作,或动作不稳定,将引起接点的耐久性下降或熔接等接点障碍。特别是大型马达等,当接通电源时,在产生较大浪涌电流的负载动作瞬间,加到继电器线圈上的电压有时会下降。

    如果继电器在电压不足的状态下工作,即使是规格书以及目录等中规定的规格以内的振动、冲击值,也会引起继电器误动作。因此,请在继电器的线圈上施加额定电压。

    对于电源电压的变动,请向线圈施加各继电器可以完全动作的电压。如果向线圈施加不能使继电器完全动作的电压,线圈会异常发热,致使线圈烧坏。

    另外,如果在和继电器的操作电路的同一电源线路上连接马达、螺线管、变压器等,当那些装置工作时,电源电压会降低,继电器的接点从而发生振动,引起接点烧坏、熔接、或不能自保。

    特别是通过小型变压器时以及变压器没有充裕容量时,如果配线较长,或家庭用、商店用等配线较细的情况下会出现这种使用方法。如果发生类似故障的情况下,请使用同步示波器等正确调整电压的变化情况,在采取对策的同时,采用适当的继电器或变换为直流电路,在下图所示电路中通过电容器吸收电压变动。