闭环调速常识(外国英文资料).docVIP

闭环调速常识(国外英文资料) Closed-loop speed control common sense Saturday, December 05, 2009 19:47 Why do you have to add a magnifying element to the front passage of a single closed-loop speed control system? Answer: the closed-loop speed control system has a much more rigid steady-state property than the open-loop speed control system. To guarantee the request of the static rate can improve the speed range, the required price is increasing the number of voltage amplifier and detection and feedback device. Why is the high precision single closed-loop dc speed regulating system required to have a high precision given power supply as a guarantee? Answer: the accuracy of the system depends on the accuracy of the given and the feedback. High-precision speed regulating system must have higher precision for a given stable voltage. Why is a single closed-loop dc speed control system using a proportional regulator as a deviation control System. Answer: because the deviation can adjust the system, if there is no deviation the system can not function normally. 4, what is the object of movement control? Answer: control object is electric machine Speed adjustment type is: ac speed adjustment, dc speed adjustment What is a composite control system? Answer: the control system that is composed of the closed-loop control system based on the disturbance compensation and the closed-loop control system What is a single closed-loop dc system? How does the system detect the speed of the motor? Answer: the dc speed control system of the speed closed-loop, and the speed is feedback in the way of voltage value. The speed tests are carried out by the speed generator with the motor coaxial. What is the static and dynamic index of the speed regulating system? Answer: static index: the stable operation indicator of the motor (the bigger the better) the static differential (the smaller the better). Dynamic indicator: the index of the transition process starts the stop process What is the role of current