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电磁调速电机控制器调整与试运行

2014/3/25 8:42:32      点击:

JD1A电磁调速电机控制器 调整与试运行;1、JD1A、JD2A按(图1)接线,输出端(3)、(4)接入离合器线圈或接入100W的照明灯泡做摸拟负载,并在输出端接入100V以上的直流电压表。
2、接通电源,指示灯亮,当转动速度指令电位器W1时,输出端应有0~90V的突跳电压(因测速负反馈未加入时的开环放大倍数很大,则认为开环时工作基本正常)。
3、起动交流异步电动机,使系统闭环工作。
a、转速表的校正(适用于JD1A,JD2A跳过此项操作):由于每台测速发电机的电压都不同,故转速表上的指示值必须要根据实际转速进行校正。当离合器运转在某一转速时,用轴测式转速表或数字转速表测量其实际转速,当出现转速表的指示值与测得的实际转速不一致时,调节“转速表校准”电位器,使之一致。
b、最高转速整定;此整定方法就是对速度反馈量的调节,将速度指令电位器顺时针方向调节至最大,并调节“反馈量调节”电位器,使之转速达到滑差电机的最高额定转速(小容量为1250转/分,大容量为1320转/分)。
4、运行中,当加入负载后发现转速有周期性的摆动,可将输出端(3)、(4)交换连接。