Description
控制电路由频率,电压的运算电路,主电路的电压,电流检测电路,电动机的速度检测电路,将运算电路的控制信号进行放大的驱动电路,以及逆变器和电动机的保护电路等组成。控制回路有开环和闭环的区别。无速度检测电路为开环控;
Cisco AS5400 AS54-CT3-648-AC 648 VOIP Access Server
90 Day Hardware Warranty – Free Shipping -14 available!
Cisco 4GE-SFP-LC 4-port GE ISE Upgraded to 1G DRAM
90 Day Warranty – Free Overnight Shipping!
Juniper PB-4OC3-SON-SMIR 4-port SONET,SDH OC-3,STM1 PIC
90 Day Warranty – Free Shipping!