The d. c. traction portion of which comprises current and voltage feedback to form double closed-loop speed adjustment system.
该机的直流牵引部采用具有电流反馈和电压反馈的双闭环调速系统。
The theoretical analysis and field adjustment of a AC cascade speed regulating system with double closed-loop employed in a synthetic fibre bar making unit imported from Switzerland are conducted.
本文对一从瑞士引进的应用于合成纤维成条机的交流串级调速双闭环系统进行了理论分析与现场调试。
The test results show that the control system can realize starting, speed adjustment, clockwise and anti-clockwise running and current closed-loop control functions of motor.
调试结果表明，控制系统可实现电机启动、调速、正反转和电流闭环控制。
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