500kW／380V国产大功率变频器在钻机上的应用

针对国外变频器价格昂贵、调试周期和维修周期长等特点，我公司自主研发了可替代进口机的高性能钻机国产专用变频器。该变频器能够从零开始调速。当钻井卡钻时，能及时断开电动机，在低速提升时，能最大限度地发挥电动机的动力特性，提供220％的转矩输出。变频器具有易安装、调试、维护，性能稳定。应用中据实测数据显示，采用变频改造后，打1口井可节省柴油15t。

The Application of Domestic High Efficiency Inverter Made for 500kW/ 380V on Drill rig

In consideration of the disadvantage of high price, long periods of debugging and maintenance of foreign inverters, a special inverter is developed for the high quality domestic drill rig, which can be used to replace the imported rigs. The inverter can start from zero to the modulate velocity, when low speed increases, power performance of the motor will be brought into full plays and 220% torque input is provided. The inverter is easy to be installed and debugged, repaired and with high stability. Detected data indicate that 15 t of diesel oil is saved for drill a well, after the reconstructed inverter is used.