外文翻譯---雙閉環(huán)直流調速系統(tǒng)的說明-其他專業(yè)-展示頁
2025-01-31 09:23本頁面
【正文】 he result? A: When the load changes, Idl Idm, speed decreased rapidly, the current Id soon to Idm, and of limited amplitude, rapid rate of ASR saturation, ACR has been limiting conditions, to form a blocking phenomenon, longrunning will damage the system. 2. System Speed regulator and current regulator in the Double Loop DC Motor Control System can be summarized as follows: (1). The role of speed regulator Speed regulator is a speed control system of the dominant regulator, which allows speed n will soon change with a given voltage Un * changes in steadystate speed error can be reduced, if the PI regulator can achieve the nonstatic error. 1) The effect of load changes in the role of antidisturbance. 2) The output amplitude of the decision limit the maximum allowable motor current. (2) The role of current regulator 1) As a regulator of the inner ring, outer ring at the speed of the adjustment process, it makes the current closely followed the given voltage Ui * (that is, the outer ring modulator output) changes. 2) Fluctuations in voltage from the role of disturbance rejection in time. 3) The speed of the dynamic process of ensuring that the maximum allowable motor current, thereby speeding up the dynamic process. 4) When the motor overload or stall when the armature current limit of the maximum, automatic protection from the role of acceleration. Once the fault disappears, the system automatically return to normal. Yesterday, the role of the reliable operation is very important. Ⅱ doubleloop speed control system mon faults analysis of a system (1). Doubleloop speed control system ponents in Figure Current loop: from the current regulator LT, trigger CF (input transformation for the CSR), siliconcontrolled rectifier bridge, motor armature and current loop transform LB ponent. the speed of outer ring: the speed regulator from ST, current loop, such as link inertia, motor and load moment of inertia and the speed of transformation 畢業(yè)設計 （外文 翻譯 ） 3 ponents SB. in the doubleloop speed control system, the speed of the decision loop of the running characteristics of the whole system and stability, and play a leading role, and to change the current ring plays the role of the internal structure of the system is dependent, but since it is as a whole to participate in the closedloop speed to the speed of a direct impact on the work of the closedloop, it must first good debugging current loop, and then testing the speed of outer ring, so that the whole system has good dynamic performance. (2). Doubleloop speed control system of the typical working condition 1) Start (or the speed): ST in the startup process has been saturated, so that the speed of this loop in the equivalent openloop state. System only in the constant current loop under the regulation to ensure the motor at a constant current of the maximum allowable under the startup. Figure 1 doubleloop speed control system structure 2) slow down (or stop): ST at this time to reach the output amplitude of the reverse limit.
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