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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    JD1A電磁調速電機控制器調整與試運行

    2014/3/25 8:42:32      點擊:

    JD1A電磁調速電機控制器 調整與試運行;1、JD1A、JD2A按(圖1)接線,輸出端(3)、(4)接入離合器線圈或接入100W的照明燈泡做摸擬負載,并在輸出端接入100V以上的直流電壓表。
    2、接通電源,指示燈亮,當轉動速度指令電位器W1時,輸出端應有0~90V的突跳電壓(因測速負反饋未加入時的開環(huán)放大倍數很大,則認為開環(huán)時工作基本正常)。
    3、起動交流異步電動機,使系統(tǒng)閉環(huán)工作。
    a、轉速表的校正(適用于JD1A,JD2A跳過此項操作):由于每臺測速發(fā)電機的電壓都不同,故轉速表上的指示值必須要根據實際轉速進行校正。當離合器運轉在某一轉速時,用軸測式轉速表或數字轉速表測量其實際轉速,當出現(xiàn)轉速表的指示值與測得的實際轉速不一致時,調節(jié)“轉速表校準”電位器,使之一致。
    b、最高轉速整定;此整定方法就是對速度反饋量的調節(jié),將速度指令電位器順時針方向調節(jié)至最大,并調節(jié)“反饋量調節(jié)”電位器,使之轉速達到滑差電機的最高額定轉速(小容量為1250轉/分,大容量為1320轉/分)。
    4、運行中,當加入負載后發(fā)現(xiàn)轉速有周期性的擺動,可將輸出端(3)、(4)交換連接。

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