The main circuit of the controllable circulating current reversible speed regulation system adopts the cross-connection method.One of the secondary windings of the rectifier transformer is connected into a Y type,and the other is connected into a△type.The phases of the two AC power sources are staggered by 30°,and the frequency of the circulating voltage is l2 times the power frequency.In order to suppress the AC circulating current,two equalizing reactors are connected between the two groups of controllable rectifier bridges,and one smoothing reactor is still reserved in the armature circuit.
The control circuit is mainly composed of the speed regulator ASR,the current regulator ACR,the circulating current regulator ARR,the positive group trigger GTD,the reverse group trigger GTS,and the current feedback device TCV.The synchronous transformer corresponding to the transformer
可控环流可逆调速系统的主电路采用交叉联接方式,整流变压器的一个副边绕组接成Y型,另一个接成△型,2个交流电源的相位错开30°,其环流电压的频率为l2倍工频。为了抑交流环流,在2组可控整流桥之间接放了2只均衡电抗器,电枢回路中仍保留一只平波电抗器。
控制电路主要由转速调节器ASR、电流调节器ACR、环流调节器ARR,正组触发器GTD、反组触发器GTS、电流反馈器TCV组成,其中2组触发器的同步信号分别取自与整流变压器相对应的同步变压器
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