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.

• 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%25的转矩输出。