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三相驱动系统的优点与直流驱动系统相比较,采用循环换流器频率控制的三相电动机,其结构简单、效率高、损耗低,在静止和低速时具有高转矩,以满足提升机紧绳需要等优点。由于可制成大功率单机驱动,三相电机比相应的直流电机重量轻,这对于塔式提升机特别有利。提升机特点主要技术数据如下表两套装置都是摩擦提升机,具有φ6.5m的摩擦轮,装有液压盘形闸。提升机置于地面。井筒深1150m。在井架上有四个天轮,按四个水平排列,主绳14根。由于布置和场地条件。两套提升机前后装在井架一侧。换流器供电和电力电路具有相应补偿和滤波电路的两台提升机的电力电路如图1。在每一相中,循环变流器包含三个线路换向可逆换流器,用直接反并联可控硅联接的三相桥式电路,在工作时无环流。即每一
The advantages of three-phase drive system Compared with the DC drive system, the three-phase motor with cycloconverter frequency control has the advantages of simple structure, high efficiency, low loss, high torque at rest and at low speed, Rope needs and other advantages. Due to the high power stand-alone drive possible, the three-phase motor is lighter than the corresponding DC motor, which is particularly advantageous for tower hoists. Lifting machine features The main technical data are as follows Table two sets of devices are friction hoist with φ6.5m friction wheel, equipped with hydraulic disc brake. Lifts on the ground. Wellbore depth 1150m. In the derrick has four days round, according to the four horizontal arrangement, the main rope 14. Due to the layout and site conditions. Two sets of hoist mounted on the derrick side. Converter power supply and power circuit with the corresponding compensation and filter circuit of the two hoist power circuit shown in Figure 1. In each phase, the cycloconverter contains three line commutation inverters with a three-phase bridge circuit with direct anti-parallel thyristor coupling, with no circulating current during operation. Each one