外文翻譯---雙閉環(huán)直流調(diào)速系統(tǒng)的說明-其他專業(yè)-全文預(yù)覽
【正文】 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(shè)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. Main circuit current by the bridge is reduced to zero after the inverter. LT and CSR output will soon reach the maximum reverse. CF pulse output to reach βmin, current loop for openloop. motor torque under deceleration until the motor speed close to the given new value, current loop and speed loop one after another into the closedloop work, motor in the new value of a given run . 3) Grid voltage fluctuation: This motor because of the larger moment of inertia, which caused the first change in armature current, ST output also did not change the effect of current loop, LT rapidly changing the output so that angle α be adjusted quickly, so the impact on the speed . 4） Small changes in load: in the operation, load changes, will cause the motor speed deviation from the given value. speed up the recovery process and the aforementioned speed (or deceleration) is similar to the process. 畢業(yè)設(shè)計 （外文 翻譯 ） 4 2. Common Fault Analysis and Processing (1) The normal supply voltage, thyristor rectifier output waveform arrhythmia caused by this phenomenon is due to trigger sawtooth slope caused inconsistency. Sawtooth slope adjust potentiometer, the output waveform uniformity could be achieved. in the adjustment process to strike a balance between Qi, this point should be paid attention to the actual debugging. (2) DC Motor Analysis of mechanical properties of soft thyristor DC motor system, when the current intermittent mechanical properties when the first noload speed is characterized by high ideals, and the second is characterized by mechanical properties of soft . The socalled mechanical features soft, that is, small changes in load will cause great changes in speed. oscilloscope to observe when using the bridge rectifier output waveform, one may find that missing relativ
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號-1